Mercurial > octave-nkf
annotate src/lex.ll @ 10048:e6441e13acb2
lex.ll: Mac OSX's flex converts EOF to 0.
| author | Ben Abbott <bpabbott@mac.com> |
|---|---|
| date | Sat, 02 Jan 2010 12:09:01 -0500 |
| parents | 7ad32bf759c3 |
| children | 5813ec5077b5 |
| rev | line source |
|---|---|
| 1994 | 1 /* |
| 1 | 2 |
| 7017 | 3 Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
| 8920 | 4 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 |
| 5 John W. Eaton | |
| 1 | 6 |
| 7 This file is part of Octave. | |
| 8 | |
| 9 Octave is free software; you can redistribute it and/or modify it | |
| 10 under the terms of the GNU General Public License as published by the | |
| 7016 | 11 Free Software Foundation; either version 3 of the License, or (at your |
| 12 option) any later version. | |
| 1 | 13 |
| 14 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 17 for more details. | |
| 18 | |
| 19 You should have received a copy of the GNU General Public License | |
| 7016 | 20 along with Octave; see the file COPYING. If not, see |
| 21 <http://www.gnu.org/licenses/>. | |
| 1 | 22 |
| 23 */ | |
| 24 | |
| 4753 | 25 %option prefix = "octave_" |
| 26 | |
|
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27 %top { |
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28 #ifdef HAVE_CONFIG_H |
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29 #include <config.h> |
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30 #endif |
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31 } |
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32 |
| 4208 | 33 %s COMMAND_START |
| 34 %s MATRIX_START | |
| 4240 | 35 |
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36 %x SCRIPT_FILE_BEGIN |
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37 %x FUNCTION_FILE_BEGIN |
| 1 | 38 |
| 39 %{ | |
| 240 | 40 |
| 1341 | 41 #include <cctype> |
| 42 #include <cstring> | |
| 43 | |
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44 #include <iostream> |
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45 #include <set> |
| 5765 | 46 #include <sstream> |
| 1823 | 47 #include <string> |
| 4214 | 48 #include <stack> |
| 1823 | 49 |
| 4093 | 50 #ifdef HAVE_UNISTD_H |
| 51 #ifdef HAVE_SYS_TYPES_H | |
| 52 #include <sys/types.h> | |
| 53 #endif | |
| 54 #include <unistd.h> | |
| 55 #endif | |
| 56 | |
| 2926 | 57 #include "cmd-edit.h" |
| 4153 | 58 #include "quit.h" |
| 4910 | 59 #include "lo-mappers.h" |
| 2926 | 60 |
| 1497 | 61 // These would be alphabetical, but y.tab.h must be included before |
| 62 // oct-gperf.h and y.tab.h must be included after token.h and the tree | |
| 63 // class declarations. We can't include y.tab.h in oct-gperf.h | |
| 64 // because it may not be protected to allow it to be included multiple | |
| 65 // times. | |
| 66 | |
| 4264 | 67 #include "Cell.h" |
| 3665 | 68 #include "comment-list.h" |
| 2181 | 69 #include "defun.h" |
| 1355 | 70 #include "error.h" |
| 4910 | 71 #include "gripes.h" |
| 1351 | 72 #include "input.h" |
| 1355 | 73 #include "lex.h" |
| 2891 | 74 #include "ov.h" |
| 1355 | 75 #include "parse.h" |
| 2987 | 76 #include "pt-all.h" |
| 2891 | 77 #include "symtab.h" |
| 78 #include "token.h" | |
| 79 #include "toplev.h" | |
| 1355 | 80 #include "utils.h" |
| 81 #include "variables.h" | |
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82 #include <oct-parse.h> |
| 2492 | 83 #include <oct-gperf.h> |
| 1 | 84 |
| 2716 | 85 #if ! (defined (FLEX_SCANNER) \ |
| 86 && defined (YY_FLEX_MAJOR_VERSION) && YY_FLEX_MAJOR_VERSION >= 2 \ | |
| 87 && defined (YY_FLEX_MINOR_VERSION) && YY_FLEX_MINOR_VERSION >= 5) | |
| 88 #error lex.l requires flex version 2.5.4 or later | |
| 89 #endif | |
| 90 | |
| 4753 | 91 #define yylval octave_lval |
| 92 | |
| 93 // Arrange to get input via readline. | |
| 94 | |
| 95 #ifdef YY_INPUT | |
| 96 #undef YY_INPUT | |
| 97 #endif | |
| 98 #define YY_INPUT(buf, result, max_size) \ | |
| 99 if ((result = octave_read (buf, max_size)) < 0) \ | |
| 100 YY_FATAL_ERROR ("octave_read () in flex scanner failed"); | |
| 101 | |
| 102 // Try to avoid crashing out completely on fatal scanner errors. | |
| 103 // The call to yy_fatal_error should never happen, but it avoids a | |
| 104 // `static function defined but not used' warning from gcc. | |
| 105 | |
| 106 #ifdef YY_FATAL_ERROR | |
| 107 #undef YY_FATAL_ERROR | |
| 108 #endif | |
| 109 #define YY_FATAL_ERROR(msg) \ | |
| 110 do \ | |
| 111 { \ | |
| 112 error (msg); \ | |
| 113 OCTAVE_QUIT; \ | |
| 114 yy_fatal_error (msg); \ | |
| 115 } \ | |
| 116 while (0) | |
| 117 | |
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118 #define DISPLAY_TOK_AND_RETURN(tok) \ |
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119 do \ |
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120 { \ |
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121 int tok_val = tok; \ |
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122 if (Vdisplay_tokens) \ |
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123 display_token (tok_val); \ |
| 8535 | 124 if (lexer_debug_flag) \ |
| 125 { \ | |
| 126 std::cerr << "R: "; \ | |
| 127 display_token (tok_val); \ | |
| 128 std::cerr << std::endl; \ | |
| 129 } \ | |
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130 return tok_val; \ |
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131 } \ |
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132 while (0) |
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133 |
| 4910 | 134 #define COUNT_TOK_AND_RETURN(tok) \ |
| 135 do \ | |
| 136 { \ | |
| 137 Vtoken_count++; \ | |
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138 DISPLAY_TOK_AND_RETURN (tok); \ |
| 4910 | 139 } \ |
| 140 while (0) | |
| 141 | |
| 4753 | 142 #define TOK_RETURN(tok) \ |
| 143 do \ | |
| 144 { \ | |
| 145 current_input_column += yyleng; \ | |
| 146 lexer_flags.quote_is_transpose = false; \ | |
| 147 lexer_flags.convert_spaces_to_comma = true; \ | |
| 4910 | 148 COUNT_TOK_AND_RETURN (tok); \ |
| 4753 | 149 } \ |
| 150 while (0) | |
| 151 | |
| 152 #define TOK_PUSH_AND_RETURN(name, tok) \ | |
| 153 do \ | |
| 154 { \ | |
| 155 yylval.tok_val = new token (name, input_line_number, \ | |
| 156 current_input_column); \ | |
| 157 token_stack.push (yylval.tok_val); \ | |
| 158 TOK_RETURN (tok); \ | |
| 159 } \ | |
| 160 while (0) | |
| 161 | |
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162 #define BIN_OP_RETURN(tok, convert, bos) \ |
| 4753 | 163 do \ |
| 164 { \ | |
| 165 yylval.tok_val = new token (input_line_number, current_input_column); \ | |
| 166 token_stack.push (yylval.tok_val); \ | |
| 167 current_input_column += yyleng; \ | |
| 168 lexer_flags.quote_is_transpose = false; \ | |
| 169 lexer_flags.convert_spaces_to_comma = convert; \ | |
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170 lexer_flags.looking_for_object_index = false; \ |
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171 lexer_flags.at_beginning_of_statement = bos; \ |
| 4910 | 172 COUNT_TOK_AND_RETURN (tok); \ |
| 4753 | 173 } \ |
| 174 while (0) | |
| 175 | |
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176 #define XBIN_OP_RETURN(tok, convert, bos) \ |
| 4753 | 177 do \ |
| 178 { \ | |
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179 gripe_matlab_incompatible_operator (yytext); \ |
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180 BIN_OP_RETURN (tok, convert, bos); \ |
| 4753 | 181 } \ |
| 182 while (0) | |
| 183 | |
| 8535 | 184 #define LEXER_DEBUG(pattern) \ |
| 185 do \ | |
| 186 { \ | |
| 187 if (lexer_debug_flag) \ | |
| 188 lexer_debug (pattern, yytext); \ | |
| 189 } \ | |
| 190 while (0) | |
| 191 | |
| 3883 | 192 // TRUE means that we have encountered EOF on the input stream. |
| 193 bool parser_end_of_input = false; | |
| 194 | |
| 1826 | 195 // Flags that need to be shared between the lexer and parser. |
| 196 lexical_feedback lexer_flags; | |
| 197 | |
| 1351 | 198 // Stack to hold tokens so that we can delete them when the parser is |
| 199 // reset and avoid growing forever just because we are stashing some | |
| 200 // information. This has to appear before lex.h is included, because | |
| 201 // one of the macros defined there uses token_stack. | |
| 2614 | 202 // |
| 5775 | 203 // FIXME -- this should really be static, but that causes |
| 2614 | 204 // problems on some systems. |
| 4214 | 205 std::stack <token*> token_stack; |
| 1351 | 206 |
| 1826 | 207 // Did eat_whitespace() eat a space or tab, or a newline, or both? |
| 1 | 208 |
| 1826 | 209 typedef int yum_yum; |
| 1 | 210 |
| 1826 | 211 const yum_yum ATE_NOTHING = 0; |
| 212 const yum_yum ATE_SPACE_OR_TAB = 1; | |
| 213 const yum_yum ATE_NEWLINE = 2; | |
| 1088 | 214 |
| 3351 | 215 // Is the closest nesting level a square bracket, squiggly brace or a paren? |
| 1826 | 216 |
| 4214 | 217 class bracket_brace_paren_nesting_level |
| 1826 | 218 { |
| 219 public: | |
| 220 | |
| 4214 | 221 bracket_brace_paren_nesting_level (void) : context () { } |
| 1826 | 222 |
| 3351 | 223 ~bracket_brace_paren_nesting_level (void) { } |
| 224 | |
| 4214 | 225 void bracket (void) { context.push (BRACKET); } |
| 226 bool is_bracket (void) | |
| 227 { return ! context.empty () && context.top () == BRACKET; } | |
| 228 | |
| 229 void brace (void) { context.push (BRACE); } | |
| 230 bool is_brace (void) | |
| 231 { return ! context.empty () && context.top () == BRACE; } | |
| 232 | |
| 233 void paren (void) { context.push (PAREN); } | |
| 234 bool is_paren (void) | |
| 235 { return ! context.empty () && context.top () == PAREN; } | |
| 236 | |
| 4608 | 237 bool is_bracket_or_brace (void) |
| 238 { return (! context.empty () | |
| 239 && (context.top () == BRACKET || context.top () == BRACE)); } | |
| 240 | |
| 4214 | 241 bool none (void) { return context.empty (); } |
| 242 | |
| 243 void remove (void) { if (! context.empty ()) context.pop (); } | |
| 244 | |
| 245 void clear (void) { while (! context.empty ()) context.pop (); } | |
| 1826 | 246 |
| 247 private: | |
| 248 | |
| 4214 | 249 std::stack<int> context; |
| 250 | |
| 5225 | 251 static const int BRACKET; |
| 252 static const int BRACE; | |
| 253 static const int PAREN; | |
| 1826 | 254 |
| 3351 | 255 bracket_brace_paren_nesting_level (const bracket_brace_paren_nesting_level&); |
| 1826 | 256 |
| 3351 | 257 bracket_brace_paren_nesting_level& |
| 258 operator = (const bracket_brace_paren_nesting_level&); | |
| 1826 | 259 }; |
| 260 | |
| 5225 | 261 const int bracket_brace_paren_nesting_level::BRACKET = 1; |
| 262 const int bracket_brace_paren_nesting_level::BRACE = 2; | |
| 263 const int bracket_brace_paren_nesting_level::PAREN = 3; | |
| 264 | |
| 3351 | 265 static bracket_brace_paren_nesting_level nesting_level; |
| 1 | 266 |
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267 static bool Vdisplay_tokens = false; |
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268 |
| 4910 | 269 static unsigned int Vtoken_count = 0; |
| 270 | |
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271 // The start state that was in effect when the beginning of a block |
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272 // comment was noticed. |
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273 static int block_comment_nesting_level = 0; |
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274 |
| 8535 | 275 // Internal variable for lexer debugging state. |
| 276 static bool lexer_debug_flag = false; | |
| 277 | |
| 146 | 278 // Forward declarations for functions defined at the bottom of this |
| 279 // file. | |
| 280 | |
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281 static int text_yyinput (void); |
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282 static void xunput (char c, char *buf); |
| 1 | 283 static void fixup_column_count (char *s); |
| 146 | 284 static void do_comma_insert_check (void); |
| 4867 | 285 static int is_keyword_token (const std::string& s); |
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286 static int process_comment (bool start_in_block, bool& eof); |
| 2857 | 287 static bool match_any (char c, const char *s); |
| 3263 | 288 static bool next_token_is_sep_op (void); |
| 3246 | 289 static bool next_token_is_bin_op (bool spc_prev); |
| 290 static bool next_token_is_postfix_unary_op (bool spc_prev); | |
| 3523 | 291 static std::string strip_trailing_whitespace (char *s); |
| 3246 | 292 static void handle_number (void); |
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293 static int handle_string (char delim); |
| 4612 | 294 static int handle_close_bracket (bool spc_gobbled, int bracket_type); |
| 9476 | 295 static int handle_superclass_identifier (void); |
| 296 static int handle_meta_identifier (void); | |
| 3974 | 297 static int handle_identifier (void); |
| 3096 | 298 static bool have_continuation (bool trailing_comments_ok = true); |
| 299 static bool have_ellipsis_continuation (bool trailing_comments_ok = true); | |
| 3665 | 300 static void scan_for_comments (const char *); |
| 1826 | 301 static yum_yum eat_whitespace (void); |
| 302 static yum_yum eat_continuation (void); | |
| 3388 | 303 static void maybe_warn_separator_insert (char sep); |
| 3400 | 304 static void gripe_single_quote_string (void); |
| 4037 | 305 static void gripe_matlab_incompatible (const std::string& msg); |
| 306 static void maybe_gripe_matlab_incompatible_comment (char c); | |
| 307 static void gripe_matlab_incompatible_continuation (void); | |
| 308 static void gripe_matlab_incompatible_operator (const std::string& op); | |
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309 static void display_token (int tok); |
| 8535 | 310 static void lexer_debug (const char *pattern, const char *text); |
| 1 | 311 |
| 312 %} | |
| 313 | |
| 314 D [0-9] | |
| 315 S [ \t] | |
| 5570 | 316 NL ((\n)|(\r)|(\r\n)) |
| 2042 | 317 SNL ({S}|{NL}) |
| 1 | 318 EL (\.\.\.) |
| 967 | 319 BS (\\) |
| 320 CONT ({EL}|{BS}) | |
| 1 | 321 Im [iIjJ] |
| 967 | 322 CCHAR [#%] |
| 323 COMMENT ({CCHAR}.*{NL}) | |
| 324 SNLCMT ({SNL}|{COMMENT}) | |
| 325 NOT ((\~)|(\!)) | |
| 4037 | 326 POW ((\*\*)|(\^)) |
| 327 EPOW (\.{POW}) | |
| 5290 | 328 IDENT ([_$a-zA-Z][_$a-zA-Z0-9]*) |
| 1 | 329 EXPON ([DdEe][+-]?{D}+) |
| 3220 | 330 NUMBER (({D}+\.?{D}*{EXPON}?)|(\.{D}+{EXPON}?)|(0[xX][0-9a-fA-F]+)) |
| 1 | 331 %% |
| 332 | |
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333 %{ |
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334 // Make script and function files start with a bogus token. This makes |
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335 // the parser go down a special path. |
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336 %} |
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337 |
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338 <SCRIPT_FILE_BEGIN>. { |
| 8535 | 339 LEXER_DEBUG ("<SCRIPT_FILE_BEGIN>."); |
| 340 | |
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341 BEGIN (INITIAL); |
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342 xunput (yytext[0], yytext); |
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343 COUNT_TOK_AND_RETURN (SCRIPT_FILE); |
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344 } |
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345 |
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346 <FUNCTION_FILE_BEGIN>. { |
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347 LEXER_DEBUG ("<FUNCTION_FILE_BEGIN>."); |
| 8535 | 348 |
| 4323 | 349 BEGIN (INITIAL); |
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350 xunput (yytext[0], yytext); |
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351 COUNT_TOK_AND_RETURN (FUNCTION_FILE); |
| 4238 | 352 } |
| 353 | |
| 968 | 354 %{ |
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355 // Help and other command-style functions. |
| 968 | 356 %} |
| 357 | |
| 4208 | 358 <COMMAND_START>{NL} { |
| 8535 | 359 LEXER_DEBUG ("<COMMAND_START>{NL}"); |
| 360 | |
| 4323 | 361 BEGIN (INITIAL); |
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362 input_line_number++; |
| 967 | 363 current_input_column = 1; |
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364 |
| 2857 | 365 lexer_flags.quote_is_transpose = false; |
| 366 lexer_flags.convert_spaces_to_comma = true; | |
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367 lexer_flags.looking_for_object_index = false; |
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368 lexer_flags.at_beginning_of_statement = true; |
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369 |
| 4910 | 370 COUNT_TOK_AND_RETURN ('\n'); |
| 967 | 371 } |
| 1 | 372 |
| 4208 | 373 <COMMAND_START>[\;\,] { |
| 8535 | 374 LEXER_DEBUG ("<COMMAND_START>[\\;\\,]"); |
| 375 | |
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376 lexer_flags.looking_for_object_index = false; |
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377 lexer_flags.at_beginning_of_statement = true; |
| 5102 | 378 |
| 379 BEGIN (INITIAL); | |
| 380 | |
| 381 if (strcmp (yytext, ",") == 0) | |
| 382 TOK_RETURN (','); | |
| 967 | 383 else |
| 5102 | 384 TOK_RETURN (';'); |
| 967 | 385 } |
| 1 | 386 |
| 4208 | 387 <COMMAND_START>[\"\'] { |
| 8535 | 388 LEXER_DEBUG ("<COMMAND_START>[\\\"\\']"); |
| 389 | |
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390 lexer_flags.at_beginning_of_statement = false; |
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391 |
| 975 | 392 current_input_column++; |
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393 int tok = handle_string (yytext[0]); |
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394 |
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395 COUNT_TOK_AND_RETURN (tok); |
| 975 | 396 } |
| 397 | |
| 4923 | 398 <COMMAND_START>[^#% \t\r\n\;\,\"\'][^ \t\r\n\;\,]*{S}* { |
| 8535 | 399 LEXER_DEBUG ("<COMMAND_START>[^#% \\t\\r\\n\\;\\,\\\"\\'][^ \\t\\r\\n\\;\\,]*{S}*"); |
| 400 | |
| 3523 | 401 std::string tok = strip_trailing_whitespace (yytext); |
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402 |
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403 lexer_flags.looking_for_object_index = false; |
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404 lexer_flags.at_beginning_of_statement = false; |
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405 |
| 5279 | 406 TOK_PUSH_AND_RETURN (tok, SQ_STRING); |
| 967 | 407 } |
| 1 | 408 |
| 968 | 409 %{ |
| 1 | 410 // For this and the next two rules, we're looking at ']', and we |
| 971 | 411 // need to know if the next token is `=' or `=='. |
| 1 | 412 // |
| 413 // It would have been so much easier if the delimiters were simply | |
| 414 // different for the expression on the left hand side of the equals | |
| 415 // operator. | |
| 971 | 416 // |
| 417 // It's also a pain in the ass to decide whether to insert a comma | |
| 418 // after seeing a ']' character... | |
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419 |
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420 // FIXME -- we need to handle block comments here. |
| 968 | 421 %} |
| 422 | |
| 4208 | 423 <MATRIX_START>{SNLCMT}*\]{S}* { |
| 8535 | 424 LEXER_DEBUG ("<MATRIX_START>{SNLCMT}*\\]{S}*"); |
| 425 | |
| 3665 | 426 scan_for_comments (yytext); |
| 1001 | 427 fixup_column_count (yytext); |
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428 |
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429 lexer_flags.looking_at_object_index.pop_front (); |
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430 |
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431 lexer_flags.looking_for_object_index = true; |
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432 lexer_flags.at_beginning_of_statement = false; |
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433 |
| 1001 | 434 int c = yytext[yyleng-1]; |
| 435 int cont_is_spc = eat_continuation (); | |
| 4608 | 436 bool spc_gobbled = (cont_is_spc || c == ' ' || c == '\t'); |
| 5345 | 437 int tok_to_return = handle_close_bracket (spc_gobbled, ']'); |
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438 |
| 5345 | 439 if (spc_gobbled) |
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440 xunput (' ', yytext); |
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441 |
| 5345 | 442 COUNT_TOK_AND_RETURN (tok_to_return); |
| 4608 | 443 } |
| 444 | |
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445 %{ |
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446 // FIXME -- we need to handle block comments here. |
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447 %} |
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448 |
| 4608 | 449 <MATRIX_START>{SNLCMT}*\}{S}* { |
| 8535 | 450 LEXER_DEBUG ("<MATRIX_START>{SNLCMT}*\\}{S}*"); |
| 451 | |
| 4608 | 452 scan_for_comments (yytext); |
| 453 fixup_column_count (yytext); | |
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454 |
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455 lexer_flags.looking_at_object_index.pop_front (); |
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456 |
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457 lexer_flags.looking_for_object_index = true; |
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458 lexer_flags.at_beginning_of_statement = false; |
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459 |
| 4608 | 460 int c = yytext[yyleng-1]; |
| 461 int cont_is_spc = eat_continuation (); | |
| 462 bool spc_gobbled = (cont_is_spc || c == ' ' || c == '\t'); | |
| 5345 | 463 int tok_to_return = handle_close_bracket (spc_gobbled, '}'); |
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464 |
| 5345 | 465 if (spc_gobbled) |
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466 xunput (' ', yytext); |
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467 |
| 5345 | 468 COUNT_TOK_AND_RETURN (tok_to_return); |
| 967 | 469 } |
| 1 | 470 |
| 968 | 471 %{ |
| 1088 | 472 // Commas are element separators in matrix constants. If we don't |
| 473 // check for continuations here we can end up inserting too many | |
| 474 // commas. | |
| 968 | 475 %} |
| 476 | |
| 4208 | 477 <MATRIX_START>{S}*\,{S}* { |
| 8535 | 478 LEXER_DEBUG ("<MATRIX_START>{S}*\\,{S}*"); |
| 479 | |
| 1088 | 480 current_input_column += yyleng; |
| 3388 | 481 |
| 1088 | 482 int tmp = eat_continuation (); |
| 3388 | 483 |
| 2857 | 484 lexer_flags.quote_is_transpose = false; |
| 485 lexer_flags.convert_spaces_to_comma = true; | |
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486 lexer_flags.looking_for_object_index = false; |
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487 lexer_flags.at_beginning_of_statement = false; |
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488 |
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489 if (! lexer_flags.looking_at_object_index.front ()) |
| 3388 | 490 { |
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491 if ((tmp & ATE_NEWLINE) == ATE_NEWLINE) |
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492 { |
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493 maybe_warn_separator_insert (';'); |
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494 |
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495 xunput (';', yytext); |
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496 } |
| 3388 | 497 } |
| 498 | |
| 4910 | 499 COUNT_TOK_AND_RETURN (','); |
| 967 | 500 } |
| 1 | 501 |
| 968 | 502 %{ |
| 503 // In some cases, spaces in matrix constants can turn into commas. | |
| 504 // If commas are required, spaces are not important in matrix | |
| 1088 | 505 // constants so we just eat them. If we don't check for continuations |
| 506 // here we can end up inserting too many commas. | |
| 968 | 507 %} |
| 430 | 508 |
| 4208 | 509 <MATRIX_START>{S}+ { |
| 8535 | 510 LEXER_DEBUG ("<MATRIX_START>{S}+"); |
| 511 | |
| 1088 | 512 current_input_column += yyleng; |
| 3388 | 513 |
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514 lexer_flags.at_beginning_of_statement = false; |
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515 |
| 3388 | 516 int tmp = eat_continuation (); |
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517 |
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518 if (! lexer_flags.looking_at_object_index.front ()) |
| 967 | 519 { |
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520 bool bin_op = next_token_is_bin_op (true); |
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521 bool postfix_un_op = next_token_is_postfix_unary_op (true); |
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522 bool sep_op = next_token_is_sep_op (); |
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523 |
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524 if (! (postfix_un_op || bin_op || sep_op) |
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525 && nesting_level.is_bracket_or_brace () |
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526 && lexer_flags.convert_spaces_to_comma) |
| 3388 | 527 { |
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528 if ((tmp & ATE_NEWLINE) == ATE_NEWLINE) |
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529 { |
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530 maybe_warn_separator_insert (';'); |
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531 |
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532 xunput (';', yytext); |
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533 } |
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534 |
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535 lexer_flags.quote_is_transpose = false; |
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536 lexer_flags.convert_spaces_to_comma = true; |
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537 |
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538 maybe_warn_separator_insert (','); |
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539 |
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540 COUNT_TOK_AND_RETURN (','); |
| 3388 | 541 } |
| 967 | 542 } |
| 543 } | |
| 430 | 544 |
| 968 | 545 %{ |
| 1088 | 546 // Semicolons are handled as row seprators in matrix constants. If we |
| 547 // don't eat whitespace here we can end up inserting too many | |
| 548 // semicolons. | |
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549 |
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550 // FIXME -- we need to handle block comments here. |
| 968 | 551 %} |
| 552 | |
| 4208 | 553 <MATRIX_START>{SNLCMT}*;{SNLCMT}* { |
| 8535 | 554 LEXER_DEBUG ("<MATRIX_START>{SNLCMT}*;{SNLCMT}*"); |
| 555 | |
| 3665 | 556 scan_for_comments (yytext); |
| 967 | 557 fixup_column_count (yytext); |
| 1001 | 558 eat_whitespace (); |
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559 |
| 2857 | 560 lexer_flags.quote_is_transpose = false; |
| 561 lexer_flags.convert_spaces_to_comma = true; | |
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562 lexer_flags.looking_for_object_index = false; |
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563 lexer_flags.at_beginning_of_statement = false; |
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564 |
| 4910 | 565 COUNT_TOK_AND_RETURN (';'); |
| 967 | 566 } |
| 567 | |
| 968 | 568 %{ |
| 1088 | 569 // In some cases, new lines can also become row separators. If we |
| 570 // don't eat whitespace here we can end up inserting too many | |
| 571 // semicolons. | |
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572 |
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573 // FIXME -- we need to handle block comments here. |
| 985 | 574 %} |
| 575 | |
| 4208 | 576 <MATRIX_START>{S}*{COMMENT}{SNLCMT}* | |
| 577 <MATRIX_START>{S}*{NL}{SNLCMT}* { | |
| 8535 | 578 LEXER_DEBUG ("<MATRIX_START>{S}*{COMMENT}{SNLCMT}*|<MATRIX_START>{S}*{NL}{SNLCMT}*"); |
| 579 | |
| 3665 | 580 scan_for_comments (yytext); |
| 1082 | 581 fixup_column_count (yytext); |
| 1088 | 582 eat_whitespace (); |
| 3388 | 583 |
| 4476 | 584 lexer_flags.quote_is_transpose = false; |
| 585 lexer_flags.convert_spaces_to_comma = true; | |
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586 lexer_flags.at_beginning_of_statement = false; |
| 4476 | 587 |
| 588 if (nesting_level.none ()) | |
| 589 return LEXICAL_ERROR; | |
| 985 | 590 |
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591 if (! lexer_flags.looking_at_object_index.front () |
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592 && nesting_level.is_bracket_or_brace ()) |
| 3388 | 593 { |
| 594 maybe_warn_separator_insert (';'); | |
| 595 | |
| 4910 | 596 COUNT_TOK_AND_RETURN (';'); |
| 985 | 597 } |
| 598 } | |
| 599 | |
| 967 | 600 \[{S}* { |
| 8535 | 601 LEXER_DEBUG ("\\[{S}*"); |
| 602 | |
| 3351 | 603 nesting_level.bracket (); |
| 975 | 604 |
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605 lexer_flags.looking_at_object_index.push_front (false); |
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606 |
| 1082 | 607 current_input_column += yyleng; |
| 2857 | 608 lexer_flags.quote_is_transpose = false; |
| 609 lexer_flags.convert_spaces_to_comma = true; | |
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610 lexer_flags.looking_for_object_index = false; |
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611 lexer_flags.at_beginning_of_statement = false; |
| 975 | 612 |
| 5615 | 613 if (lexer_flags.defining_func && ! lexer_flags.parsed_function_name) |
| 614 lexer_flags.looking_at_return_list = true; | |
| 615 else | |
| 616 lexer_flags.looking_at_matrix_or_assign_lhs = true; | |
| 617 | |
| 975 | 618 promptflag--; |
| 619 eat_whitespace (); | |
| 620 | |
| 5102 | 621 lexer_flags.bracketflag++; |
| 622 BEGIN (MATRIX_START); | |
| 623 COUNT_TOK_AND_RETURN ('['); | |
| 967 | 624 } |
| 1 | 625 |
| 968 | 626 \] { |
| 8535 | 627 LEXER_DEBUG ("\\]"); |
| 628 | |
| 1826 | 629 nesting_level.remove (); |
| 968 | 630 |
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631 lexer_flags.looking_at_object_index.pop_front (); |
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632 |
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633 lexer_flags.looking_for_object_index = true; |
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634 lexer_flags.at_beginning_of_statement = false; |
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635 |
| 5102 | 636 TOK_RETURN (']'); |
| 968 | 637 } |
| 638 | |
| 639 %{ | |
| 640 // Imaginary numbers. | |
| 641 %} | |
| 642 | |
| 643 {NUMBER}{Im} { | |
| 8535 | 644 LEXER_DEBUG ("{NUMBER}{Im}"); |
| 645 | |
| 3246 | 646 handle_number (); |
| 4910 | 647 COUNT_TOK_AND_RETURN (IMAG_NUM); |
| 968 | 648 } |
| 649 | |
| 650 %{ | |
| 651 // Real numbers. Don't grab the `.' part of a dot operator as part of | |
| 652 // the constant. | |
| 653 %} | |
| 654 | |
| 8535 | 655 {D}+/\.[\*/\\^\'] | |
| 968 | 656 {NUMBER} { |
| 8535 | 657 LEXER_DEBUG ("{D}+/\\.[\\*/\\^\\']|{NUMBER}"); |
| 3246 | 658 handle_number (); |
| 4910 | 659 COUNT_TOK_AND_RETURN (NUM); |
| 968 | 660 } |
| 661 | |
| 662 %{ | |
| 663 // Eat whitespace. Whitespace inside matrix constants is handled by | |
| 4208 | 664 // the <MATRIX_START> start state code above. |
| 968 | 665 %} |
| 666 | |
| 967 | 667 {S}* { |
| 668 current_input_column += yyleng; | |
| 669 } | |
| 670 | |
| 968 | 671 %{ |
| 672 // Continuation lines. Allow comments after continuations. | |
| 673 %} | |
| 674 | |
| 967 | 675 {CONT}{S}*{NL} | |
| 676 {CONT}{S}*{COMMENT} { | |
| 8535 | 677 LEXER_DEBUG ("{CONT}{S}*{NL}|{CONT}{S}*{COMMENT}"); |
| 678 | |
| 4037 | 679 if (yytext[0] == '\\') |
| 680 gripe_matlab_incompatible_continuation (); | |
| 3665 | 681 scan_for_comments (yytext); |
| 967 | 682 promptflag--; |
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683 input_line_number++; |
| 967 | 684 current_input_column = 1; |
| 685 } | |
| 1 | 686 |
| 968 | 687 %{ |
| 688 // End of file. | |
| 689 %} | |
| 690 | |
| 967 | 691 <<EOF>> { |
| 8535 | 692 LEXER_DEBUG ("<<EOF>>"); |
| 693 | |
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694 if (block_comment_nesting_level != 0) |
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695 { |
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696 warning ("block comment open at end of input"); |
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697 |
| 9476 | 698 if ((reading_fcn_file || reading_script_file || reading_classdef_file) |
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699 && ! curr_fcn_file_name.empty ()) |
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700 warning ("near line %d of file `%s.m'", |
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701 input_line_number, curr_fcn_file_name.c_str ()); |
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702 } |
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703 |
| 967 | 704 TOK_RETURN (END_OF_INPUT); |
| 705 } | |
| 1 | 706 |
| 968 | 707 %{ |
| 970 | 708 // Identifiers. Truncate the token at the first space or tab but |
| 709 // don't write directly on yytext. | |
| 968 | 710 %} |
| 711 | |
| 967 | 712 {IDENT}{S}* { |
| 8535 | 713 LEXER_DEBUG ("{IDENT}{S}*"); |
| 714 | |
| 4238 | 715 int id_tok = handle_identifier (); |
| 716 | |
| 717 if (id_tok >= 0) | |
|
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718 COUNT_TOK_AND_RETURN (id_tok); |
| 967 | 719 } |
| 1 | 720 |
| 968 | 721 %{ |
| 9476 | 722 // Superclass method identifiers. |
| 723 %} | |
| 724 | |
| 725 {IDENT}@{IDENT}{S}* | | |
| 726 {IDENT}@{IDENT}.{IDENT}{S}* { | |
| 727 LEXER_DEBUG ("{IDENT}@{IDENT}{S}*|{IDENT}@{IDENT}.{IDENT}{S}*"); | |
| 728 | |
| 729 int id_tok = handle_superclass_identifier (); | |
| 730 | |
| 731 if (id_tok >= 0) | |
| 732 { | |
| 733 lexer_flags.looking_for_object_index = true; | |
| 734 | |
| 735 COUNT_TOK_AND_RETURN (SUPERCLASSREF); | |
| 736 } | |
| 737 } | |
| 738 | |
| 739 %{ | |
| 740 // Metaclass query | |
| 741 %} | |
| 742 | |
| 743 \?{IDENT}{S}* | | |
| 744 \?{IDENT}.{IDENT}{S}* { | |
| 745 LEXER_DEBUG ("\?{IDENT}{S}* | \?{IDENT}.{IDENT}{S}*"); | |
| 746 | |
| 747 int id_tok = handle_meta_identifier (); | |
| 748 | |
| 749 if (id_tok >= 0) | |
| 750 { | |
| 751 lexer_flags.looking_for_object_index = true; | |
| 752 | |
| 753 COUNT_TOK_AND_RETURN (METAQUERY); | |
| 754 } | |
| 755 } | |
| 756 | |
| 757 %{ | |
| 758 // Function handles and superclass references | |
| 4342 | 759 %} |
| 760 | |
| 4930 | 761 "@" { |
| 8535 | 762 LEXER_DEBUG ("@"); |
| 763 | |
| 4930 | 764 current_input_column++; |
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765 |
| 4930 | 766 lexer_flags.quote_is_transpose = false; |
| 767 lexer_flags.convert_spaces_to_comma = false; | |
| 768 lexer_flags.looking_at_function_handle++; | |
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769 lexer_flags.looking_for_object_index = false; |
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770 lexer_flags.at_beginning_of_statement = false; |
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771 |
| 4930 | 772 COUNT_TOK_AND_RETURN ('@'); |
| 9476 | 773 |
| 4342 | 774 } |
| 775 | |
| 776 %{ | |
| 968 | 777 // A new line character. New line characters inside matrix constants |
| 4208 | 778 // are handled by the <MATRIX_START> start state code above. If closest |
| 985 | 779 // nesting is inside parentheses, don't return a row separator. |
| 968 | 780 %} |
| 781 | |
| 967 | 782 {NL} { |
| 8535 | 783 LEXER_DEBUG ("{NL}"); |
| 784 | |
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785 input_line_number++; |
| 967 | 786 current_input_column = 1; |
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787 |
| 2857 | 788 lexer_flags.quote_is_transpose = false; |
| 789 lexer_flags.convert_spaces_to_comma = true; | |
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790 |
| 1826 | 791 if (nesting_level.none ()) |
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792 { |
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793 lexer_flags.at_beginning_of_statement = true; |
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794 COUNT_TOK_AND_RETURN ('\n'); |
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795 } |
| 4037 | 796 else if (nesting_level.is_paren ()) |
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797 { |
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798 lexer_flags.at_beginning_of_statement = false; |
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799 gripe_matlab_incompatible ("bare newline inside parentheses"); |
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800 } |
| 4608 | 801 else if (nesting_level.is_bracket_or_brace ()) |
| 985 | 802 return LEXICAL_ERROR; |
| 967 | 803 } |
| 1 | 804 |
| 968 | 805 %{ |
| 806 // Single quote can either be the beginning of a string or a transpose | |
| 807 // operator. | |
| 808 %} | |
| 809 | |
| 967 | 810 "'" { |
| 8535 | 811 LEXER_DEBUG ("'"); |
| 812 | |
| 967 | 813 current_input_column++; |
| 2857 | 814 lexer_flags.convert_spaces_to_comma = true; |
| 1 | 815 |
| 1826 | 816 if (lexer_flags.quote_is_transpose) |
| 967 | 817 { |
| 818 do_comma_insert_check (); | |
| 4910 | 819 COUNT_TOK_AND_RETURN (QUOTE); |
| 967 | 820 } |
| 821 else | |
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822 { |
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823 int tok = handle_string ('\''); |
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824 COUNT_TOK_AND_RETURN (tok); |
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825 } |
| 967 | 826 } |
| 1 | 827 |
| 968 | 828 %{ |
| 971 | 829 // Double quotes always begin strings. |
| 830 %} | |
| 831 | |
| 973 | 832 \" { |
| 8535 | 833 LEXER_DEBUG ("\""); |
| 834 | |
| 973 | 835 current_input_column++; |
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836 int tok = handle_string ('"'); |
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837 |
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838 COUNT_TOK_AND_RETURN (tok); |
| 973 | 839 } |
| 971 | 840 |
| 841 %{ | |
|
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842 // Gobble comments. |
| 985 | 843 %} |
| 968 | 844 |
| 967 | 845 {CCHAR} { |
| 8535 | 846 LEXER_DEBUG ("{CCHAR}"); |
| 847 | |
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848 lexer_flags.looking_for_object_index = false; |
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849 |
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850 xunput (yytext[0], yytext); |
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851 |
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852 bool eof = false; |
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853 int tok = process_comment (false, eof); |
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854 |
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855 if (eof) |
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856 TOK_RETURN (END_OF_INPUT); |
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857 else if (tok > 0) |
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858 COUNT_TOK_AND_RETURN (tok); |
| 967 | 859 } |
| 440 | 860 |
| 968 | 861 %{ |
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862 // Block comments. |
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863 %} |
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864 |
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865 ^{S}*{CCHAR}\{{S}*{NL} { |
| 8535 | 866 LEXER_DEBUG ("^{S}*{CCHAR}\\{{S}*{NL}"); |
| 867 | |
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868 lexer_flags.looking_for_object_index = false; |
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869 |
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870 input_line_number++; |
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871 current_input_column = 1; |
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872 block_comment_nesting_level++; |
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873 promptflag--; |
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874 |
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875 bool eof = false; |
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876 process_comment (true, eof); |
|
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|
877 } |
|
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878 |
|
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|
879 %{ |
| 968 | 880 // Other operators. |
| 881 %} | |
| 882 | |
|
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883 ":" { LEXER_DEBUG (":"); BIN_OP_RETURN (':', false, false); } |
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884 |
|
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885 ".+" { LEXER_DEBUG (".+"); XBIN_OP_RETURN (EPLUS, false, false); } |
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886 ".-" { LEXER_DEBUG (".-"); XBIN_OP_RETURN (EMINUS, false, false); } |
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887 ".*" { LEXER_DEBUG (".*"); BIN_OP_RETURN (EMUL, false, false); } |
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888 "./" { LEXER_DEBUG ("./"); BIN_OP_RETURN (EDIV, false, false); } |
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889 ".\\" { LEXER_DEBUG (".\\"); BIN_OP_RETURN (ELEFTDIV, false, false); } |
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890 ".^" { LEXER_DEBUG (".^"); BIN_OP_RETURN (EPOW, false, false); } |
|
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891 ".**" { LEXER_DEBUG (".**"); XBIN_OP_RETURN (EPOW, false, false); } |
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892 ".'" { LEXER_DEBUG (".'"); do_comma_insert_check (); BIN_OP_RETURN (TRANSPOSE, true, false); } |
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893 "++" { LEXER_DEBUG ("++"); do_comma_insert_check (); XBIN_OP_RETURN (PLUS_PLUS, true, false); } |
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894 "--" { LEXER_DEBUG ("--"); do_comma_insert_check (); XBIN_OP_RETURN (MINUS_MINUS, true, false); } |
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895 "<=" { LEXER_DEBUG ("<="); BIN_OP_RETURN (EXPR_LE, false, false); } |
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896 "==" { LEXER_DEBUG ("=="); BIN_OP_RETURN (EXPR_EQ, false, false); } |
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897 "~=" { LEXER_DEBUG ("~="); BIN_OP_RETURN (EXPR_NE, false, false); } |
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898 "!=" { LEXER_DEBUG ("!="); XBIN_OP_RETURN (EXPR_NE, false, false); } |
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899 ">=" { LEXER_DEBUG (">="); BIN_OP_RETURN (EXPR_GE, false, false); } |
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900 "&" { LEXER_DEBUG ("&"); BIN_OP_RETURN (EXPR_AND, false, false); } |
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901 "|" { LEXER_DEBUG ("|"); BIN_OP_RETURN (EXPR_OR, false, false); } |
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902 "<" { LEXER_DEBUG ("<"); BIN_OP_RETURN (EXPR_LT, false, false); } |
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903 ">" { LEXER_DEBUG (">"); BIN_OP_RETURN (EXPR_GT, false, false); } |
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904 "+" { LEXER_DEBUG ("+"); BIN_OP_RETURN ('+', false, false); } |
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905 "-" { LEXER_DEBUG ("-"); BIN_OP_RETURN ('-', false, false); } |
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906 "*" { LEXER_DEBUG ("*"); BIN_OP_RETURN ('*', false, false); } |
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907 "/" { LEXER_DEBUG ("/"); BIN_OP_RETURN ('/', false, false); } |
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908 "\\" { LEXER_DEBUG ("\\"); BIN_OP_RETURN (LEFTDIV, false, false); } |
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909 ";" { LEXER_DEBUG (";"); BIN_OP_RETURN (';', true, true); } |
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910 "," { LEXER_DEBUG (","); BIN_OP_RETURN (',', true, ! lexer_flags.looking_at_object_index.front ()); } |
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911 "^" { LEXER_DEBUG ("^"); BIN_OP_RETURN (POW, false, false); } |
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912 "**" { LEXER_DEBUG ("**"); XBIN_OP_RETURN (POW, false, false); } |
|
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913 "=" { LEXER_DEBUG ("="); BIN_OP_RETURN ('=', true, false); } |
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914 "&&" { LEXER_DEBUG ("&&"); BIN_OP_RETURN (EXPR_AND_AND, false, false); } |
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915 "||" { LEXER_DEBUG ("||"); BIN_OP_RETURN (EXPR_OR_OR, false, false); } |
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916 "<<" { LEXER_DEBUG ("<<"); XBIN_OP_RETURN (LSHIFT, false, false); } |
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917 ">>" { LEXER_DEBUG (">>"); XBIN_OP_RETURN (RSHIFT, false, false); } |
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918 |
| 967 | 919 {NOT} { |
| 8535 | 920 LEXER_DEBUG ("{NOT}"); |
| 921 | |
| 4037 | 922 if (yytext[0] == '~') |
|
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923 BIN_OP_RETURN (EXPR_NOT, false, false); |
| 4037 | 924 else |
|
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925 XBIN_OP_RETURN (EXPR_NOT, false, false); |
| 967 | 926 } |
| 1 | 927 |
| 967 | 928 "(" { |
| 8535 | 929 LEXER_DEBUG ("("); |
| 930 | |
|
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931 // If we are looking for an object index, then push TRUE for |
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932 // looking_at_object_index. Otherwise, just push whatever state |
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933 // is current (so that we can pop it off the stack when we find |
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934 // the matching close paren). |
|
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935 |
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936 lexer_flags.looking_at_object_index.push_front |
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937 (lexer_flags.looking_for_object_index); |
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938 |
| 4131 | 939 lexer_flags.looking_at_indirect_ref = false; |
|
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940 lexer_flags.looking_for_object_index = false; |
|
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941 lexer_flags.at_beginning_of_statement = false; |
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942 |
| 1826 | 943 nesting_level.paren (); |
| 985 | 944 promptflag--; |
|
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945 |
| 967 | 946 TOK_RETURN ('('); |
| 947 } | |
| 948 | |
| 949 ")" { | |
| 8535 | 950 LEXER_DEBUG (")"); |
| 951 | |
| 1826 | 952 nesting_level.remove (); |
| 967 | 953 current_input_column++; |
|
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|
954 |
|
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|
955 lexer_flags.looking_at_object_index.pop_front (); |
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956 |
| 2857 | 957 lexer_flags.quote_is_transpose = true; |
| 4608 | 958 lexer_flags.convert_spaces_to_comma = nesting_level.is_bracket_or_brace (); |
|
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|
959 lexer_flags.looking_for_object_index = true; |
|
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960 lexer_flags.at_beginning_of_statement = false; |
|
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|
961 |
| 1001 | 962 do_comma_insert_check (); |
|
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963 |
| 4910 | 964 COUNT_TOK_AND_RETURN (')'); |
| 967 | 965 } |
| 966 | |
|
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967 "." { |
|
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|
968 LEXER_DEBUG ("."); |
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969 |
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970 lexer_flags.looking_for_object_index = false; |
|
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971 lexer_flags.at_beginning_of_statement = false; |
|
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972 |
|
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973 TOK_RETURN ('.'); |
|
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|
974 } |
| 8535 | 975 |
|
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976 "+=" { LEXER_DEBUG ("+="); XBIN_OP_RETURN (ADD_EQ, false, false); } |
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977 "-=" { LEXER_DEBUG ("-="); XBIN_OP_RETURN (SUB_EQ, false, false); } |
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978 "*=" { LEXER_DEBUG ("*="); XBIN_OP_RETURN (MUL_EQ, false, false); } |
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979 "/=" { LEXER_DEBUG ("/="); XBIN_OP_RETURN (DIV_EQ, false, false); } |
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980 "\\=" { LEXER_DEBUG ("\\="); XBIN_OP_RETURN (LEFTDIV_EQ, false, false); } |
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981 ".+=" { LEXER_DEBUG (".+="); XBIN_OP_RETURN (ADD_EQ, false, false); } |
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982 ".-=" { LEXER_DEBUG (".-="); XBIN_OP_RETURN (SUB_EQ, false, false); } |
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983 ".*=" { LEXER_DEBUG (".*="); XBIN_OP_RETURN (EMUL_EQ, false, false); } |
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984 "./=" { LEXER_DEBUG ("./="); XBIN_OP_RETURN (EDIV_EQ, false, false); } |
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985 ".\\=" { LEXER_DEBUG (".\\="); XBIN_OP_RETURN (ELEFTDIV_EQ, false, false); } |
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986 {POW}= { LEXER_DEBUG ("{POW}="); XBIN_OP_RETURN (POW_EQ, false, false); } |
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987 {EPOW}= { LEXER_DEBUG ("{EPOW}="); XBIN_OP_RETURN (EPOW_EQ, false, false); } |
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988 "&=" { LEXER_DEBUG ("&="); XBIN_OP_RETURN (AND_EQ, false, false); } |
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989 "|=" { LEXER_DEBUG ("|="); XBIN_OP_RETURN (OR_EQ, false, false); } |
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990 "<<=" { LEXER_DEBUG ("<<="); XBIN_OP_RETURN (LSHIFT_EQ, false, false); } |
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991 ">>=" { LEXER_DEBUG (">>="); XBIN_OP_RETURN (RSHIFT_EQ, false, false); } |
| 2877 | 992 |
| 4608 | 993 \{{S}* { |
| 8535 | 994 LEXER_DEBUG ("\\{{S}*"); |
| 995 | |
| 3351 | 996 nesting_level.brace (); |
| 4608 | 997 |
|
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998 lexer_flags.looking_at_object_index.push_front |
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999 (lexer_flags.looking_for_object_index); |
|
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|
1000 |
| 4608 | 1001 current_input_column += yyleng; |
| 1002 lexer_flags.quote_is_transpose = false; | |
| 1003 lexer_flags.convert_spaces_to_comma = true; | |
|
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1004 lexer_flags.looking_for_object_index = false; |
|
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1005 lexer_flags.at_beginning_of_statement = false; |
| 4608 | 1006 |
| 3351 | 1007 promptflag--; |
| 4608 | 1008 eat_whitespace (); |
| 1009 | |
| 4613 | 1010 lexer_flags.braceflag++; |
| 4608 | 1011 BEGIN (MATRIX_START); |
| 4910 | 1012 COUNT_TOK_AND_RETURN ('{'); |
| 3351 | 1013 } |
| 1014 | |
| 1015 "}" { | |
| 8535 | 1016 LEXER_DEBUG ("}"); |
| 1017 | |
|
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1018 lexer_flags.looking_at_object_index.pop_front (); |
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1019 |
|
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1020 lexer_flags.looking_for_object_index = true; |
|
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1021 lexer_flags.at_beginning_of_statement = false; |
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1022 |
| 3351 | 1023 nesting_level.remove (); |
| 1024 | |
| 4608 | 1025 TOK_RETURN ('}'); |
| 3351 | 1026 } |
| 1027 | |
| 968 | 1028 %{ |
| 2066 | 1029 // Unrecognized input is a lexical error. |
| 968 | 1030 %} |
| 1 | 1031 |
| 2042 | 1032 . { |
| 8535 | 1033 LEXER_DEBUG ("."); |
| 1034 | |
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1035 xunput (yytext[0], yytext); |
| 4248 | 1036 |
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1037 int c = text_yyinput (); |
| 4248 | 1038 |
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1039 #if defined (__APPLE__) && defined (__MACH__) |
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1040 if (! (c == EOF || c == 0)) |
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1041 #else /* not MacOS X */ |
| 4248 | 1042 if (c != EOF) |
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1043 #endif |
| 4240 | 1044 { |
| 1045 current_input_column++; | |
| 1046 | |
| 1047 error ("invalid character `%s' (ASCII %d) near line %d, column %d", | |
| 4248 | 1048 undo_string_escape (static_cast<char> (c)), c, |
| 4240 | 1049 input_line_number, current_input_column); |
| 1050 | |
| 1051 return LEXICAL_ERROR; | |
| 1052 } | |
| 1053 else | |
| 1054 TOK_RETURN (END_OF_INPUT); | |
| 2066 | 1055 } |
| 1 | 1056 |
| 1057 %% | |
| 1058 | |
| 767 | 1059 // GAG. |
| 1060 // | |
| 1061 // If we're reading a matrix and the next character is '[', make sure | |
| 1062 // that we insert a comma ahead of it. | |
| 1063 | |
| 146 | 1064 void |
| 1 | 1065 do_comma_insert_check (void) |
| 1066 { | |
| 1001 | 1067 int spc_gobbled = eat_continuation (); |
| 2970 | 1068 |
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1069 int c = text_yyinput (); |
| 2970 | 1070 |
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1071 xunput (c, yytext); |
| 2970 | 1072 |
| 1001 | 1073 if (spc_gobbled) |
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1074 xunput (' ', yytext); |
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1075 |
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1076 lexer_flags.do_comma_insert = (! lexer_flags.looking_at_object_index.front () |
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1077 && lexer_flags.bracketflag && c == '['); |
| 1 | 1078 } |
| 1079 | |
| 767 | 1080 // Fix things up for errors or interrupts. The parser is never called |
| 1081 // recursively, so it is always safe to reinitialize its state before | |
| 1082 // doing any parsing. | |
| 1083 | |
| 1 | 1084 void |
| 1085 reset_parser (void) | |
| 1086 { | |
| 1826 | 1087 // Start off on the right foot. |
| 4323 | 1088 BEGIN (INITIAL); |
| 4318 | 1089 |
| 3883 | 1090 parser_end_of_input = false; |
| 4238 | 1091 |
| 1092 while (! symtab_context.empty ()) | |
| 1093 symtab_context.pop (); | |
| 287 | 1094 |
| 1826 | 1095 // We do want a prompt by default. |
| 1 | 1096 promptflag = 1; |
| 287 | 1097 |
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1098 // We are not in a block comment. |
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1099 block_comment_nesting_level = 0; |
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1100 |
| 3351 | 1101 // Error may have occurred inside some brackets, braces, or parentheses. |
| 985 | 1102 nesting_level.clear (); |
| 287 | 1103 |
| 1826 | 1104 // Clear out the stack of token info used to track line and column |
| 1105 // numbers. | |
| 143 | 1106 while (! token_stack.empty ()) |
| 4214 | 1107 { |
| 1108 delete token_stack.top (); | |
| 1109 token_stack.pop (); | |
| 1110 } | |
| 287 | 1111 |
| 1826 | 1112 // Can be reset by defining a function. |
| 9476 | 1113 if (! (reading_script_file || reading_fcn_file || reading_classdef_file)) |
| 985 | 1114 { |
| 1115 current_input_column = 1; | |
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1116 input_line_number = command_editor::current_command_number (); |
| 985 | 1117 } |
| 287 | 1118 |
| 1826 | 1119 // Only ask for input from stdin if we are expecting interactive |
| 1120 // input. | |
| 3174 | 1121 if ((interactive || forced_interactive) |
| 3880 | 1122 && ! (reading_fcn_file |
| 9476 | 1123 || reading_classdef_file |
| 3880 | 1124 || reading_script_file |
| 1125 || get_input_from_eval_string | |
| 3174 | 1126 || input_from_startup_file)) |
| 287 | 1127 yyrestart (stdin); |
| 991 | 1128 |
| 1826 | 1129 // Clear the buffer for help text. |
| 4426 | 1130 while (! help_buf.empty ()) |
| 1131 help_buf.pop (); | |
| 1755 | 1132 |
| 1826 | 1133 // Reset other flags. |
| 1134 lexer_flags.init (); | |
| 1 | 1135 } |
| 1136 | |
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1137 static void |
| 8535 | 1138 display_character (char c) |
| 1139 { | |
| 1140 if (isgraph (c)) | |
| 1141 std::cerr << c; | |
| 1142 else | |
| 1143 switch (c) | |
| 1144 { | |
| 1145 case 0: | |
| 1146 std::cerr << "NUL"; | |
| 1147 break; | |
| 1148 | |
| 1149 case 1: | |
| 1150 std::cerr << "SOH"; | |
| 1151 break; | |
| 1152 | |
| 1153 case 2: | |
| 1154 std::cerr << "STX"; | |
| 1155 break; | |
| 1156 | |
| 1157 case 3: | |
| 1158 std::cerr << "ETX"; | |
| 1159 break; | |
| 1160 | |
| 1161 case 4: | |
| 1162 std::cerr << "EOT"; | |
| 1163 break; | |
| 1164 | |
| 1165 case 5: | |
| 1166 std::cerr << "ENQ"; | |
| 1167 break; | |
| 1168 | |
| 1169 case 6: | |
| 1170 std::cerr << "ACK"; | |
| 1171 break; | |
| 1172 | |
| 1173 case 7: | |
| 1174 std::cerr << "\\a"; | |
| 1175 break; | |
| 1176 | |
| 1177 case 8: | |
| 1178 std::cerr << "\\b"; | |
| 1179 break; | |
| 1180 | |
| 1181 case 9: | |
| 1182 std::cerr << "\\t"; | |
| 1183 break; | |
| 1184 | |
| 1185 case 10: | |
| 1186 std::cerr << "\\n"; | |
| 1187 break; | |
| 1188 | |
| 1189 case 11: | |
| 1190 std::cerr << "\\v"; | |
| 1191 break; | |
| 1192 | |
| 1193 case 12: | |
| 1194 std::cerr << "\\f"; | |
| 1195 break; | |
| 1196 | |
| 1197 case 13: | |
| 1198 std::cerr << "\\r"; | |
| 1199 break; | |
| 1200 | |
| 1201 case 14: | |
| 1202 std::cerr << "SO"; | |
| 1203 break; | |
| 1204 | |
| 1205 case 15: | |
| 1206 std::cerr << "SI"; | |
| 1207 break; | |
| 1208 | |
| 1209 case 16: | |
| 1210 std::cerr << "DLE"; | |
| 1211 break; | |
| 1212 | |
| 1213 case 17: | |
| 1214 std::cerr << "DC1"; | |
| 1215 break; | |
| 1216 | |
| 1217 case 18: | |
| 1218 std::cerr << "DC2"; | |
| 1219 break; | |
| 1220 | |
| 1221 case 19: | |
| 1222 std::cerr << "DC3"; | |
| 1223 break; | |
| 1224 | |
| 1225 case 20: | |
| 1226 std::cerr << "DC4"; | |
| 1227 break; | |
| 1228 | |
| 1229 case 21: | |
| 1230 std::cerr << "NAK"; | |
| 1231 break; | |
| 1232 | |
| 1233 case 22: | |
| 1234 std::cerr << "SYN"; | |
| 1235 break; | |
| 1236 | |
| 1237 case 23: | |
| 1238 std::cerr << "ETB"; | |
| 1239 break; | |
| 1240 | |
| 1241 case 24: | |
| 1242 std::cerr << "CAN"; | |
| 1243 break; | |
| 1244 | |
| 1245 case 25: | |
| 1246 std::cerr << "EM"; | |
| 1247 break; | |
| 1248 | |
| 1249 case 26: | |
| 1250 std::cerr << "SUB"; | |
| 1251 break; | |
| 1252 | |
| 1253 case 27: | |
| 1254 std::cerr << "ESC"; | |
| 1255 break; | |
| 1256 | |
| 1257 case 28: | |
| 1258 std::cerr << "FS"; | |
| 1259 break; | |
| 1260 | |
| 1261 case 29: | |
| 1262 std::cerr << "GS"; | |
| 1263 break; | |
| 1264 | |
| 1265 case 30: | |
| 1266 std::cerr << "RS"; | |
| 1267 break; | |
| 1268 | |
| 1269 case 31: | |
| 1270 std::cerr << "US"; | |
| 1271 break; | |
| 1272 | |
| 1273 case 32: | |
| 1274 std::cerr << "SPACE"; | |
| 1275 break; | |
| 1276 | |
| 1277 case 127: | |
| 1278 std::cerr << "DEL"; | |
| 1279 break; | |
| 1280 } | |
| 1281 } | |
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1282 |
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1283 static int |
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1284 text_yyinput (void) |
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1285 { |
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1286 int c = yyinput (); |
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1287 |
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1288 if (lexer_debug_flag) |
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1289 { |
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1290 std::cerr << "I: "; |
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1291 display_character (c); |
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1292 std::cerr << std::endl; |
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1293 } |
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1294 |
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1295 // Convert CRLF into just LF and single CR into LF. |
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1296 |
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1297 if (c == '\r') |
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1298 { |
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1299 c = yyinput (); |
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1300 |
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1301 if (lexer_debug_flag) |
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1302 { |
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1303 std::cerr << "I: "; |
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1304 display_character (c); |
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1305 std::cerr << std::endl; |
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1306 } |
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1307 |
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1308 if (c != '\n') |
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1309 { |
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1310 xunput (c, yytext); |
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1311 c = '\n'; |
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1312 } |
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1313 } |
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1314 |
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1315 if (c == '\n') |
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1316 input_line_number++; |
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1317 |
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1318 return c; |
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1319 } |
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1320 |
| 8535 | 1321 static void |
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1322 xunput (char c, char *buf) |
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1323 { |
| 8535 | 1324 if (lexer_debug_flag) |
| 1325 { | |
| 1326 std::cerr << "U: "; | |
| 1327 display_character (c); | |
| 1328 std::cerr << std::endl; | |
| 1329 } | |
| 1330 | |
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1331 if (c == '\n') |
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1332 input_line_number--; |
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1333 |
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1334 yyunput (c, buf); |
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1335 } |
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1336 |
| 767 | 1337 // If we read some newlines, we need figure out what column we're |
| 1338 // really looking at. | |
| 1339 | |
| 1 | 1340 static void |
| 1341 fixup_column_count (char *s) | |
| 1342 { | |
| 1343 char c; | |
| 1344 while ((c = *s++) != '\0') | |
| 1345 { | |
| 1346 if (c == '\n') | |
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1347 { |
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1348 input_line_number++; |
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1349 current_input_column = 1; |
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1350 } |
| 1 | 1351 else |
| 1352 current_input_column++; | |
| 1353 } | |
| 1354 } | |
| 1355 | |
| 767 | 1356 // Include these so that we don't have to link to libfl.a. |
| 246 | 1357 |
| 3332 | 1358 int |
| 1 | 1359 yywrap (void) |
| 1360 { | |
| 287 | 1361 return 1; |
| 1 | 1362 } |
| 1363 | |
| 767 | 1364 // Tell us all what the current buffer is. |
| 1365 | |
| 1 | 1366 YY_BUFFER_STATE |
| 1367 current_buffer (void) | |
| 1368 { | |
| 1369 return YY_CURRENT_BUFFER; | |
| 1370 } | |
| 1371 | |
| 767 | 1372 // Create a new buffer. |
| 1373 | |
| 1 | 1374 YY_BUFFER_STATE |
| 1375 create_buffer (FILE *f) | |
| 1376 { | |
| 1377 return yy_create_buffer (f, YY_BUF_SIZE); | |
| 1378 } | |
| 1379 | |
| 767 | 1380 // Start reading a new buffer. |
| 1381 | |
| 1 | 1382 void |
| 1383 switch_to_buffer (YY_BUFFER_STATE buf) | |
| 1384 { | |
| 1385 yy_switch_to_buffer (buf); | |
| 1386 } | |
| 1387 | |
| 767 | 1388 // Delete a buffer. |
| 1389 | |
| 1 | 1390 void |
| 1391 delete_buffer (YY_BUFFER_STATE buf) | |
| 1392 { | |
| 1393 yy_delete_buffer (buf); | |
| 1394 } | |
| 1395 | |
| 767 | 1396 // Restore a buffer (for unwind-prot). |
| 1397 | |
| 1 | 1398 void |
| 1399 restore_input_buffer (void *buf) | |
| 1400 { | |
| 2861 | 1401 switch_to_buffer (static_cast<YY_BUFFER_STATE> (buf)); |
| 1 | 1402 } |
| 1403 | |
| 767 | 1404 // Delete a buffer (for unwind-prot). |
| 1405 | |
| 1 | 1406 void |
| 1407 delete_input_buffer (void *buf) | |
| 1408 { | |
| 2861 | 1409 delete_buffer (static_cast<YY_BUFFER_STATE> (buf)); |
| 1 | 1410 } |
| 1411 | |
|
8745
6dc61981d18b
better handling of object indexing in lexer
John W. Eaton <jwe@octave.org>
parents:
8701
diff
changeset
|
1412 static bool |
|
6dc61981d18b
better handling of object indexing in lexer
John W. Eaton <jwe@octave.org>
parents:
8701
diff
changeset
|
1413 inside_any_object_index (void) |
|
6dc61981d18b
better handling of object indexing in lexer
John W. Eaton <jwe@octave.org>
parents:
8701
diff
changeset
|
1414 { |
|
6dc61981d18b
better handling of object indexing in lexer
John W. Eaton <jwe@octave.org>
parents:
8701
diff
changeset
|
1415 bool retval = false; |
|
6dc61981d18b
better handling of object indexing in lexer
John W. Eaton <jwe@octave.org>
parents:
8701
diff
changeset
|
1416 |
|
6dc61981d18b
better handling of object indexing in lexer
John W. Eaton <jwe@octave.org>
parents:
8701
diff
changeset
|
1417 for (std::list<bool>::const_iterator i = lexer_flags.looking_at_object_index.begin (); |
|
6dc61981d18b
better handling of object indexing in lexer
John W. Eaton <jwe@octave.org>
parents:
8701
diff
changeset
|
1418 i != lexer_flags.looking_at_object_index.end (); i++) |
|
6dc61981d18b
better handling of object indexing in lexer
John W. Eaton <jwe@octave.org>
parents:
8701
diff
changeset
|
1419 { |
|
6dc61981d18b
better handling of object indexing in lexer
John W. Eaton <jwe@octave.org>
parents:
8701
diff
changeset
|
1420 if (*i) |
|
6dc61981d18b
better handling of object indexing in lexer
John W. Eaton <jwe@octave.org>
parents:
8701
diff
changeset
|
1421 { |
|
6dc61981d18b
better handling of object indexing in lexer
John W. Eaton <jwe@octave.org>
parents:
8701
diff
changeset
|
1422 retval = true; |
|
6dc61981d18b
better handling of object indexing in lexer
John W. Eaton <jwe@octave.org>
parents:
8701
diff
changeset
|
1423 break; |
|
6dc61981d18b
better handling of object indexing in lexer
John W. Eaton <jwe@octave.org>
parents:
8701
diff
changeset
|
1424 } |
|
6dc61981d18b
better handling of object indexing in lexer
John W. Eaton <jwe@octave.org>
parents:
8701
diff
changeset
|
1425 } |
|
6dc61981d18b
better handling of object indexing in lexer
John W. Eaton <jwe@octave.org>
parents:
8701
diff
changeset
|
1426 |
|
6dc61981d18b
better handling of object indexing in lexer
John W. Eaton <jwe@octave.org>
parents:
8701
diff
changeset
|
1427 return retval; |
|
6dc61981d18b
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John W. Eaton <jwe@octave.org>
parents:
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diff
changeset
|
1428 } |
|
6dc61981d18b
better handling of object indexing in lexer
John W. Eaton <jwe@octave.org>
parents:
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diff
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|
1429 |
| 4238 | 1430 // Handle keywords. Return -1 if the keyword should be ignored. |
| 767 | 1431 |
| 1 | 1432 static int |
| 4867 | 1433 is_keyword_token (const std::string& s) |
| 1 | 1434 { |
| 3805 | 1435 int l = input_line_number; |
| 1436 int c = current_input_column; | |
| 1437 | |
| 1823 | 1438 int len = s.length (); |
| 922 | 1439 |
| 5088 | 1440 const octave_kw *kw = octave_kw_hash::in_word_set (s.c_str (), len); |
| 191 | 1441 |
| 1497 | 1442 if (kw) |
| 143 | 1443 { |
| 1497 | 1444 yylval.tok_val = 0; |
| 1445 | |
| 1446 switch (kw->kw_id) | |
| 1447 { | |
| 1448 case break_kw: | |
| 1449 case catch_kw: | |
| 1450 case continue_kw: | |
| 1451 case else_kw: | |
| 2764 | 1452 case otherwise_kw: |
| 1497 | 1453 case return_kw: |
|
8746
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
1454 case unwind_protect_cleanup_kw: |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
1455 lexer_flags.at_beginning_of_statement = true; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
1456 break; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
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diff
changeset
|
1457 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
1458 case case_kw: |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
1459 case elseif_kw: |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
1460 case global_kw: |
| 2846 | 1461 case static_kw: |
| 3484 | 1462 case until_kw: |
|
8746
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
1463 break; |
| 1497 | 1464 |
| 1465 case end_kw: | |
| 9476 | 1466 if (! reading_classdef_file |
| 1467 && (inside_any_object_index () | |
| 1468 || (lexer_flags.defining_func | |
| 1469 && ! (lexer_flags.looking_at_return_list | |
| 1470 || lexer_flags.parsed_function_name)))) | |
| 4234 | 1471 return 0; |
|
9474
25ed2d6aacf6
Parse nested functions more accurately.
David Grundberg <individ@acc.umu.se>
parents:
9324
diff
changeset
|
1472 |
|
25ed2d6aacf6
Parse nested functions more accurately.
David Grundberg <individ@acc.umu.se>
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9324
diff
changeset
|
1473 yylval.tok_val = new token (token::simple_end, l, c); |
|
25ed2d6aacf6
Parse nested functions more accurately.
David Grundberg <individ@acc.umu.se>
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diff
changeset
|
1474 lexer_flags.at_beginning_of_statement = true; |
| 1497 | 1475 break; |
| 1476 | |
| 1477 case end_try_catch_kw: | |
|
8746
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
1478 yylval.tok_val = new token (token::try_catch_end, l, c); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
1479 lexer_flags.at_beginning_of_statement = true; |
| 1497 | 1480 break; |
| 1481 | |
| 1482 case end_unwind_protect_kw: | |
|
8746
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
1483 yylval.tok_val = new token (token::unwind_protect_end, l, c); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
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diff
changeset
|
1484 lexer_flags.at_beginning_of_statement = true; |
| 1497 | 1485 break; |
| 1486 | |
| 1487 case endfor_kw: | |
|
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5dd06f19e9be
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John W. Eaton <jwe@octave.org>
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diff
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|
1488 yylval.tok_val = new token (token::for_end, l, c); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
1489 lexer_flags.at_beginning_of_statement = true; |
| 1497 | 1490 break; |
| 1491 | |
| 1492 case endfunction_kw: | |
|
9474
25ed2d6aacf6
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David Grundberg <individ@acc.umu.se>
parents:
9324
diff
changeset
|
1493 yylval.tok_val = new token (token::function_end, l, c); |
|
25ed2d6aacf6
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David Grundberg <individ@acc.umu.se>
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diff
changeset
|
1494 lexer_flags.at_beginning_of_statement = true; |
| 1497 | 1495 break; |
| 1496 | |
| 1497 case endif_kw: | |
|
8746
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handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
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diff
changeset
|
1498 yylval.tok_val = new token (token::if_end, l, c); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
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diff
changeset
|
1499 lexer_flags.at_beginning_of_statement = true; |
| 1497 | 1500 break; |
| 1501 | |
| 2764 | 1502 case endswitch_kw: |
|
8746
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handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
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diff
changeset
|
1503 yylval.tok_val = new token (token::switch_end, l, c); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
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diff
changeset
|
1504 lexer_flags.at_beginning_of_statement = true; |
| 2764 | 1505 break; |
| 1506 | |
| 1497 | 1507 case endwhile_kw: |
|
8746
5dd06f19e9be
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John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
1508 yylval.tok_val = new token (token::while_end, l, c); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
1509 lexer_flags.at_beginning_of_statement = true; |
| 1497 | 1510 break; |
| 9476 | 1511 |
| 1512 case endclassdef_kw: | |
| 1513 yylval.tok_val = new token (token::classdef_end, l, c); | |
| 1514 lexer_flags.at_beginning_of_statement = true; | |
| 1515 break; | |
| 1516 | |
| 1517 case endevents_kw: | |
| 1518 yylval.tok_val = new token (token::events_end, l, c); | |
| 1519 lexer_flags.at_beginning_of_statement = true; | |
| 1520 break; | |
| 1521 | |
| 1522 case endmethods_kw: | |
| 1523 yylval.tok_val = new token (token::methods_end, l, c); | |
| 1524 lexer_flags.at_beginning_of_statement = true; | |
| 1525 break; | |
| 1526 | |
| 1527 case endproperties_kw: | |
| 1528 yylval.tok_val = new token (token::properties_end, l, c); | |
| 1529 lexer_flags.at_beginning_of_statement = true; | |
| 1530 break; | |
| 1497 | 1531 |
| 1532 case for_kw: | |
| 1533 case while_kw: | |
|
8746
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
1534 promptflag--; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
1535 lexer_flags.looping++; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
1536 break; |
| 4238 | 1537 |
| 1538 case do_kw: | |
|
8746
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
1539 lexer_flags.at_beginning_of_statement = true; |
| 1497 | 1540 promptflag--; |
| 1826 | 1541 lexer_flags.looping++; |
| 1497 | 1542 break; |
| 1543 | |
|
8746
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
1544 case try_kw: |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
1545 case unwind_protect_kw: |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
1546 lexer_flags.at_beginning_of_statement = true; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
1547 promptflag--; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
1548 break; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
1549 |
| 1497 | 1550 case if_kw: |
| 2764 | 1551 case switch_kw: |
| 1497 | 1552 promptflag--; |
| 1553 break; | |
| 1554 | |
| 9476 | 1555 case get_kw: |
| 1556 case set_kw: | |
| 1557 // 'get' and 'set' are keywords in classdef method | |
| 1558 // declarations. | |
| 1559 if (! lexer_flags.maybe_classdef_get_set_method) | |
| 1560 return 0; | |
| 1561 break; | |
| 1562 | |
| 1563 case properties_kw: | |
| 1564 case methods_kw: | |
| 1565 case events_kw: | |
| 1566 // 'properties', 'methods' and 'events' are keywords for | |
| 1567 // classdef blocks. | |
| 1568 if (! lexer_flags.parsing_classdef) | |
| 1569 return 0; | |
| 1570 // fall through ... | |
| 1571 | |
| 1572 case classdef_kw: | |
| 1573 // 'classdef' is always a keyword. | |
| 1574 promptflag--; | |
| 1575 break; | |
| 1576 | |
| 1497 | 1577 case function_kw: |
|
9474
25ed2d6aacf6
Parse nested functions more accurately.
David Grundberg <individ@acc.umu.se>
parents:
9324
diff
changeset
|
1578 promptflag--; |
|
25ed2d6aacf6
Parse nested functions more accurately.
David Grundberg <individ@acc.umu.se>
parents:
9324
diff
changeset
|
1579 |
|
25ed2d6aacf6
Parse nested functions more accurately.
David Grundberg <individ@acc.umu.se>
parents:
9324
diff
changeset
|
1580 lexer_flags.defining_func = true; |
|
25ed2d6aacf6
Parse nested functions more accurately.
David Grundberg <individ@acc.umu.se>
parents:
9324
diff
changeset
|
1581 lexer_flags.parsed_function_name = false; |
|
25ed2d6aacf6
Parse nested functions more accurately.
David Grundberg <individ@acc.umu.se>
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9324
diff
changeset
|
1582 |
| 9476 | 1583 if (! (reading_fcn_file || reading_script_file |
| 1584 || reading_classdef_file)) | |
|
9474
25ed2d6aacf6
Parse nested functions more accurately.
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diff
changeset
|
1585 input_line_number = 1; |
| 1497 | 1586 break; |
| 1587 | |
| 3174 | 1588 case magic_file_kw: |
| 1589 { | |
| 9476 | 1590 if ((reading_fcn_file || reading_script_file |
| 1591 || reading_classdef_file) | |
| 3174 | 1592 && ! curr_fcn_file_full_name.empty ()) |
| 1593 yylval.tok_val = new token (curr_fcn_file_full_name, l, c); | |
| 1594 else | |
| 1595 yylval.tok_val = new token ("stdin", l, c); | |
| 1596 } | |
| 1597 break; | |
| 1598 | |
| 1599 case magic_line_kw: | |
| 1600 yylval.tok_val = new token (static_cast<double> (l), "", l, c); | |
| 1601 break; | |
| 1602 | |
| 1497 | 1603 default: |
| 1604 panic_impossible (); | |
| 1605 } | |
| 1606 | |
| 1607 if (! yylval.tok_val) | |
| 1608 yylval.tok_val = new token (l, c); | |
| 1609 | |
| 476 | 1610 token_stack.push (yylval.tok_val); |
| 1497 | 1611 |
| 1612 return kw->tok; | |
| 143 | 1613 } |
| 1 | 1614 |
| 1615 return 0; | |
| 1616 } | |
| 1617 | |
| 2702 | 1618 static bool |
| 3523 | 1619 is_variable (const std::string& name) |
| 2702 | 1620 { |
|
8001
ff9e7873f8ea
improve handling of command-style names in matrix_or_assign_lhs context
John W. Eaton <jwe@octave.org>
parents:
7898
diff
changeset
|
1621 return (symbol_table::is_variable (name) |
|
ff9e7873f8ea
improve handling of command-style names in matrix_or_assign_lhs context
John W. Eaton <jwe@octave.org>
parents:
7898
diff
changeset
|
1622 || (lexer_flags.pending_local_variables.find (name) |
|
ff9e7873f8ea
improve handling of command-style names in matrix_or_assign_lhs context
John W. Eaton <jwe@octave.org>
parents:
7898
diff
changeset
|
1623 != lexer_flags.pending_local_variables.end ())); |
| 2702 | 1624 } |
| 1625 | |
|
7723
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1626 static std::string |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1627 grab_block_comment (stream_reader& reader, bool& eof) |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
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7722
diff
changeset
|
1628 { |
|
74f5e0c7de9e
first pass at handling block comments
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7722
diff
changeset
|
1629 std::string buf; |
|
74f5e0c7de9e
first pass at handling block comments
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diff
changeset
|
1630 |
|
74f5e0c7de9e
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diff
changeset
|
1631 bool at_bol = true; |
|
74f5e0c7de9e
first pass at handling block comments
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diff
changeset
|
1632 bool look_for_marker = false; |
|
74f5e0c7de9e
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7722
diff
changeset
|
1633 |
|
74f5e0c7de9e
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John W. Eaton <jwe@octave.org>
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diff
changeset
|
1634 bool warned_incompatible = false; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1635 |
|
74f5e0c7de9e
first pass at handling block comments
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diff
changeset
|
1636 int c = 0; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1637 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1638 while ((c = reader.getc ()) != EOF) |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1639 { |
|
74f5e0c7de9e
first pass at handling block comments
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parents:
7722
diff
changeset
|
1640 current_input_column++; |
|
74f5e0c7de9e
first pass at handling block comments
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parents:
7722
diff
changeset
|
1641 |
|
74f5e0c7de9e
first pass at handling block comments
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diff
changeset
|
1642 if (look_for_marker) |
|
74f5e0c7de9e
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parents:
7722
diff
changeset
|
1643 { |
|
74f5e0c7de9e
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parents:
7722
diff
changeset
|
1644 at_bol = false; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1645 look_for_marker = false; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1646 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1647 if (c == '{' || c == '}') |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1648 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1649 std::string tmp_buf (1, static_cast<char> (c)); |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1650 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1651 int type = c; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1652 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1653 bool done = false; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1654 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1655 while ((c = reader.getc ()) != EOF && ! done) |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1656 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1657 current_input_column++; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1658 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1659 switch (c) |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1660 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1661 case ' ': |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1662 case '\t': |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1663 tmp_buf += static_cast<char> (c); |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1664 break; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1665 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1666 case '\n': |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1667 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1668 current_input_column = 0; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1669 at_bol = true; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1670 done = true; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1671 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1672 if (type == '{') |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1673 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1674 block_comment_nesting_level++; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1675 promptflag--; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1676 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1677 else |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1678 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1679 block_comment_nesting_level--; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1680 promptflag++; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1681 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1682 if (block_comment_nesting_level == 0) |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1683 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1684 buf += grab_comment_block (reader, true, eof); |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1685 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1686 return buf; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1687 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1688 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1689 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1690 break; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1691 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1692 default: |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1693 at_bol = false; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1694 tmp_buf += static_cast<char> (c); |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1695 buf += tmp_buf; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1696 done = true; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1697 break; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1698 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1699 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1700 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1701 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1702 |
|
7898
cce16b4e0970
lex.l (grab_block_comment): Use parens around || expression within && expression
John W. Eaton <jwe@octave.org>
parents:
7728
diff
changeset
|
1703 if (at_bol && (c == '%' || c == '#')) |
|
7723
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1704 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1705 if (c == '#' && ! warned_incompatible) |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1706 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1707 warned_incompatible = true; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1708 maybe_gripe_matlab_incompatible_comment (c); |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1709 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1710 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1711 at_bol = false; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1712 look_for_marker = true; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1713 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1714 else |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1715 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1716 buf += static_cast<char> (c); |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1717 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1718 if (c == '\n') |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1719 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1720 current_input_column = 0; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1721 at_bol = true; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1722 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1723 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1724 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1725 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1726 if (c == EOF) |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1727 eof = true; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1728 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1729 return buf; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1730 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1731 |
|
7720
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1732 std::string |
|
7723
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1733 grab_comment_block (stream_reader& reader, bool at_bol, |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1734 bool& eof) |
| 1 | 1735 { |
| 4426 | 1736 std::string buf; |
| 1019 | 1737 |
|
7720
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1738 // TRUE means we are at the beginning of a comment block. |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1739 bool begin_comment = false; |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1740 |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1741 // TRUE means we are currently reading a comment block. |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1742 bool in_comment = false; |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1743 |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1744 bool warned_incompatible = false; |
| 3665 | 1745 |
| 1019 | 1746 int c = 0; |
| 1 | 1747 |
|
7720
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1748 while ((c = reader.getc ()) != EOF) |
| 1019 | 1749 { |
|
7720
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1750 current_input_column++; |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1751 |
| 2300 | 1752 if (begin_comment) |
| 1753 { | |
| 1754 if (c == '%' || c == '#') | |
|
7723
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1755 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1756 at_bol = false; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1757 continue; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1758 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1759 else if (at_bol && c == '{') |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1760 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1761 std::string tmp_buf (1, static_cast<char> (c)); |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1762 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1763 bool done = false; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1764 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1765 while ((c = reader.getc ()) != EOF && ! done) |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1766 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1767 current_input_column++; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1768 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1769 switch (c) |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1770 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1771 case ' ': |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1772 case '\t': |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1773 tmp_buf += static_cast<char> (c); |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1774 break; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1775 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1776 case '\n': |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
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|
1777 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1778 current_input_column = 0; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1779 at_bol = true; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1780 done = true; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1781 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1782 block_comment_nesting_level++; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1783 promptflag--; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1784 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1785 buf += grab_block_comment (reader, eof); |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1786 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1787 in_comment = false; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1788 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1789 if (eof) |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1790 goto done; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1791 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1792 break; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1793 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
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7722
diff
changeset
|
1794 default: |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1795 at_bol = false; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
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|
1796 tmp_buf += static_cast<char> (c); |
|
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first pass at handling block comments
John W. Eaton <jwe@octave.org>
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diff
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|
1797 buf += tmp_buf; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
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7722
diff
changeset
|
1798 done = true; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
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7722
diff
changeset
|
1799 break; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
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7722
diff
changeset
|
1800 } |
|
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John W. Eaton <jwe@octave.org>
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diff
changeset
|
1801 } |
|
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first pass at handling block comments
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1802 } |
| 2300 | 1803 else |
|
7723
74f5e0c7de9e
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John W. Eaton <jwe@octave.org>
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diff
changeset
|
1804 { |
|
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first pass at handling block comments
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changeset
|
1805 at_bol = false; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
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diff
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|
1806 begin_comment = false; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
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diff
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|
1807 } |
| 2300 | 1808 } |
| 1809 | |
| 1019 | 1810 if (in_comment) |
| 1 | 1811 { |
| 4426 | 1812 buf += static_cast<char> (c); |
| 1755 | 1813 |
| 1019 | 1814 if (c == '\n') |
| 3427 | 1815 { |
|
7723
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first pass at handling block comments
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1816 at_bol = true; |
|
7720
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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7715
diff
changeset
|
1817 current_input_column = 0; |
| 3427 | 1818 in_comment = false; |
|
8537
17ef48c699a5
lex.l (grab_comment_block): if not reading from a file, bail at first newline inside a comment:
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1819 |
|
17ef48c699a5
lex.l (grab_comment_block): if not reading from a file, bail at first newline inside a comment:
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1820 // FIXME -- bailing out here prevents things like |
|
17ef48c699a5
lex.l (grab_comment_block): if not reading from a file, bail at first newline inside a comment:
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1821 // |
|
17ef48c699a5
lex.l (grab_comment_block): if not reading from a file, bail at first newline inside a comment:
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1822 // octave> # comment |
|
17ef48c699a5
lex.l (grab_comment_block): if not reading from a file, bail at first newline inside a comment:
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1823 // octave> x = 1 |
|
17ef48c699a5
lex.l (grab_comment_block): if not reading from a file, bail at first newline inside a comment:
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1824 // |
|
17ef48c699a5
lex.l (grab_comment_block): if not reading from a file, bail at first newline inside a comment:
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1825 // from failing at the command line, while still |
|
17ef48c699a5
lex.l (grab_comment_block): if not reading from a file, bail at first newline inside a comment:
John W. Eaton <jwe@octave.org>
parents:
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diff
changeset
|
1826 // allowing blocks of comments to be grabbed properly |
|
17ef48c699a5
lex.l (grab_comment_block): if not reading from a file, bail at first newline inside a comment:
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1827 // for function doc strings. But only the first line of |
|
17ef48c699a5
lex.l (grab_comment_block): if not reading from a file, bail at first newline inside a comment:
John W. Eaton <jwe@octave.org>
parents:
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diff
changeset
|
1828 // a mult-line doc string will be picked up for |
|
17ef48c699a5
lex.l (grab_comment_block): if not reading from a file, bail at first newline inside a comment:
John W. Eaton <jwe@octave.org>
parents:
8536
diff
changeset
|
1829 // functions defined on the command line. We need a |
|
17ef48c699a5
lex.l (grab_comment_block): if not reading from a file, bail at first newline inside a comment:
John W. Eaton <jwe@octave.org>
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8536
diff
changeset
|
1830 // better way of collecting these comments... |
|
17ef48c699a5
lex.l (grab_comment_block): if not reading from a file, bail at first newline inside a comment:
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1831 if (! (reading_fcn_file || reading_script_file)) |
|
17ef48c699a5
lex.l (grab_comment_block): if not reading from a file, bail at first newline inside a comment:
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1832 goto done; |
| 3427 | 1833 } |
| 1019 | 1834 } |
| 1835 else | |
| 1836 { | |
| 1837 switch (c) | |
| 991 | 1838 { |
|
7720
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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changeset
|
1839 case ' ': |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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changeset
|
1840 case '\t': |
|
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unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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changeset
|
1841 break; |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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changeset
|
1842 |
| 4037 | 1843 case '#': |
|
7720
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unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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changeset
|
1844 if (! warned_incompatible) |
|
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unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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changeset
|
1845 { |
|
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unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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changeset
|
1846 warned_incompatible = true; |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
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diff
changeset
|
1847 maybe_gripe_matlab_incompatible_comment (c); |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1848 } |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1849 // fall through... |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
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diff
changeset
|
1850 |
| 1019 | 1851 case '%': |
| 2300 | 1852 in_comment = true; |
| 1853 begin_comment = true; | |
| 1019 | 1854 break; |
| 777 | 1855 |
| 1019 | 1856 default: |
|
7720
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1857 current_input_column--; |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1858 reader.ungetc (c); |
| 1019 | 1859 goto done; |
| 1 | 1860 } |
| 1861 } | |
| 1019 | 1862 } |
| 991 | 1863 |
| 1019 | 1864 done: |
| 991 | 1865 |
|
7715
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parse scripts completely before executing
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diff
changeset
|
1866 if (c == EOF) |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1867 eof = true; |
|
5b4d278ec828
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John W. Eaton <jwe@octave.org>
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diff
changeset
|
1868 |
| 4426 | 1869 return buf; |
| 1 | 1870 } |
| 1871 | |
|
7720
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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7715
diff
changeset
|
1872 class |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1873 flex_stream_reader : public stream_reader |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1874 { |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1875 public: |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1876 flex_stream_reader (char *buf_arg) : stream_reader (), buf (buf_arg) { } |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1877 |
|
7728
13820b9f5fd9
more consistent handling of CR/CRLF/LF line endings in lexer and parser
John W. Eaton <jwe@octave.org>
parents:
7723
diff
changeset
|
1878 int getc (void) { return ::text_yyinput (); } |
|
8447
adab48231a03
make input_line_number work again
John W. Eaton <jwe@octave.org>
parents:
8312
diff
changeset
|
1879 int ungetc (int c) { ::xunput (c, buf); return 0; } |
|
7720
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unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1880 |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1881 private: |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1882 char *buf; |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1883 }; |
|
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unify comment and help text processing in lex.l and parse.y
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diff
changeset
|
1884 |
|
7715
5b4d278ec828
parse scripts completely before executing
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diff
changeset
|
1885 static int |
|
7723
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
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7722
diff
changeset
|
1886 process_comment (bool start_in_block, bool& eof) |
|
7715
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diff
changeset
|
1887 { |
|
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parse scripts completely before executing
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diff
changeset
|
1888 eof = false; |
|
5b4d278ec828
parse scripts completely before executing
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diff
changeset
|
1889 |
|
5b4d278ec828
parse scripts completely before executing
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diff
changeset
|
1890 std::string help_txt; |
|
5b4d278ec828
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diff
changeset
|
1891 |
|
5b4d278ec828
parse scripts completely before executing
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changeset
|
1892 if (! help_buf.empty ()) |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1893 help_txt = help_buf.top (); |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1894 |
|
7720
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unify comment and help text processing in lex.l and parse.y
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diff
changeset
|
1895 flex_stream_reader flex_reader (yytext); |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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7715
diff
changeset
|
1896 |
|
7723
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first pass at handling block comments
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1897 // process_comment is only supposed to be called when we are not |
|
74f5e0c7de9e
first pass at handling block comments
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changeset
|
1898 // initially looking at a block comment. |
|
74f5e0c7de9e
first pass at handling block comments
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changeset
|
1899 |
|
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changeset
|
1900 std::string txt = start_in_block |
|
74f5e0c7de9e
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changeset
|
1901 ? grab_block_comment (flex_reader, eof) |
|
74f5e0c7de9e
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changeset
|
1902 : grab_comment_block (flex_reader, false, eof); |
|
7720
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diff
changeset
|
1903 |
| 8535 | 1904 if (lexer_debug_flag) |
|
8536
de1b944d5306
lex.l: finish previous change
John W. Eaton <jwe@octave.org>
parents:
8535
diff
changeset
|
1905 std::cerr << "C: " << txt << std::endl; |
| 8535 | 1906 |
|
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parse scripts completely before executing
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1907 if (help_txt.empty () && nesting_level.none ()) |
|
5b4d278ec828
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changeset
|
1908 { |
|
5b4d278ec828
parse scripts completely before executing
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changeset
|
1909 if (! help_buf.empty ()) |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1910 help_buf.pop (); |
|
5b4d278ec828
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diff
changeset
|
1911 |
|
5b4d278ec828
parse scripts completely before executing
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changeset
|
1912 help_buf.push (txt); |
|
5b4d278ec828
parse scripts completely before executing
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7634
diff
changeset
|
1913 } |
|
7720
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unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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|
1914 |
|
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unify comment and help text processing in lex.l and parse.y
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changeset
|
1915 octave_comment_buffer::append (txt); |
|
7715
5b4d278ec828
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changeset
|
1916 |
|
5b4d278ec828
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changeset
|
1917 current_input_column = 1; |
|
5b4d278ec828
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changeset
|
1918 lexer_flags.quote_is_transpose = false; |
|
5b4d278ec828
parse scripts completely before executing
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7634
diff
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|
1919 lexer_flags.convert_spaces_to_comma = true; |
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1920 lexer_flags.at_beginning_of_statement = true; |
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1921 |
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1922 if (YY_START == COMMAND_START) |
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1923 BEGIN (INITIAL); |
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1924 |
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1925 if (nesting_level.none ()) |
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1926 return '\n'; |
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1927 else if (nesting_level.is_bracket_or_brace ()) |
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1928 return ';'; |
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1929 else |
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1930 return 0; |
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1931 } |
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1932 |
| 767 | 1933 // Return 1 if the given character matches any character in the given |
| 1934 // string. | |
| 1935 | |
| 2857 | 1936 static bool |
| 2804 | 1937 match_any (char c, const char *s) |
| 1 | 1938 { |
| 1939 char tmp; | |
| 1940 while ((tmp = *s++) != '\0') | |
| 1941 { | |
| 1942 if (c == tmp) | |
| 2857 | 1943 return true; |
| 1 | 1944 } |
| 2857 | 1945 return false; |
| 1 | 1946 } |
| 1947 | |
| 767 | 1948 // Given information about the spacing surrounding an operator, |
| 1949 // return 1 if it looks like it should be treated as a binary | |
| 1950 // operator. For example, | |
| 1951 // | |
| 3774 | 1952 // [ 1 + 2 ] or [ 1+ 2] or [ 1+2 ] ==> binary |
| 1953 // | |
| 1954 // [ 1 +2 ] ==> unary | |
| 767 | 1955 |
| 2857 | 1956 static bool |
| 3246 | 1957 looks_like_bin_op (bool spc_prev, int next_char) |
| 1 | 1958 { |
| 3246 | 1959 bool spc_next = (next_char == ' ' || next_char == '\t'); |
| 1960 | |
| 608 | 1961 return ((spc_prev && spc_next) || ! spc_prev); |
| 1 | 1962 } |
| 1963 | |
| 3263 | 1964 // Recognize separators. If the separator is a CRLF pair, it is |
| 1965 // replaced by a single LF. | |
| 1966 | |
| 1967 static bool | |
| 1968 next_token_is_sep_op (void) | |
| 1969 { | |
| 1970 bool retval = false; | |
| 1971 | |
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1972 int c = text_yyinput (); |
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1973 |
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1974 retval = match_any (c, ",;\n]"); |
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1975 |
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1976 xunput (c, yytext); |
| 3263 | 1977 |
| 1978 return retval; | |
| 1979 } | |
| 1980 | |
| 767 | 1981 // Try to determine if the next token should be treated as a postfix |
| 1982 // unary operator. This is ugly, but it seems to do the right thing. | |
| 1983 | |
| 2857 | 1984 static bool |
| 3246 | 1985 next_token_is_postfix_unary_op (bool spc_prev) |
| 1 | 1986 { |
| 2857 | 1987 bool un_op = false; |
| 1 | 1988 |
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1989 int c0 = text_yyinput (); |
| 1 | 1990 |
| 3246 | 1991 if (c0 == '\'' && ! spc_prev) |
| 1992 { | |
| 1993 un_op = true; | |
| 1994 } | |
| 1995 else if (c0 == '.') | |
| 1996 { | |
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1997 int c1 = text_yyinput (); |
| 3246 | 1998 un_op = (c1 == '\''); |
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1999 xunput (c1, yytext); |
| 3246 | 2000 } |
| 4613 | 2001 else if (c0 == '+') |
| 2002 { | |
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2003 int c1 = text_yyinput (); |
| 4613 | 2004 un_op = (c1 == '+'); |
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2005 xunput (c1, yytext); |
| 4613 | 2006 } |
| 2007 else if (c0 == '-') | |
| 2008 { | |
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2009 int c1 = text_yyinput (); |
| 4613 | 2010 un_op = (c1 == '-'); |
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2011 xunput (c1, yytext); |
| 4613 | 2012 } |
| 1 | 2013 |
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2014 xunput (c0, yytext); |
| 1 | 2015 |
| 2016 return un_op; | |
| 2017 } | |
| 2018 | |
| 767 | 2019 // Try to determine if the next token should be treated as a binary |
| 3246 | 2020 // operator. |
| 1521 | 2021 // |
| 3246 | 2022 // This kluge exists because whitespace is not always ignored inside |
| 3774 | 2023 // the square brackets that are used to create matrix objects (though |
| 2024 // spacing only really matters in the cases that can be interpreted | |
| 2025 // either as binary ops or prefix unary ops: currently just +, -). | |
| 2026 // | |
| 3779 | 2027 // Note that a line continuation directly following a + or - operator |
| 2028 // (e.g., the characters '[' 'a' ' ' '+' '\' LFD 'b' ']') will be | |
| 2029 // parsed as a binary operator. | |
| 767 | 2030 |
| 2857 | 2031 static bool |
| 3246 | 2032 next_token_is_bin_op (bool spc_prev) |
| 1 | 2033 { |
| 2857 | 2034 bool bin_op = false; |
| 1 | 2035 |
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2036 int c0 = text_yyinput (); |
| 1 | 2037 |
| 2038 switch (c0) | |
| 2039 { | |
| 777 | 2040 case '+': |
| 2041 case '-': | |
| 3774 | 2042 { |
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2043 int c1 = text_yyinput (); |
| 3774 | 2044 |
| 2045 switch (c1) | |
| 2046 { | |
| 2047 case '+': | |
| 2048 case '-': | |
| 2049 // Unary ops, spacing doesn't matter. | |
| 2050 break; | |
| 2051 | |
| 2052 case '=': | |
| 2053 // Binary ops, spacing doesn't matter. | |
| 2054 bin_op = true; | |
| 2055 break; | |
| 2056 | |
| 2057 default: | |
| 2058 // Could be either, spacing matters. | |
| 2059 bin_op = looks_like_bin_op (spc_prev, c1); | |
| 2060 break; | |
| 2061 } | |
| 2062 | |
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2063 xunput (c1, yytext); |
| 3774 | 2064 } |
| 2065 break; | |
| 2066 | |
| 2067 case ':': | |
| 3246 | 2068 case '/': |
| 2069 case '\\': | |
| 2070 case '^': | |
| 3774 | 2071 // Always a binary op (may also include /=, \=, and ^=). |
| 2072 bin_op = true; | |
| 1276 | 2073 break; |
| 2074 | |
| 3246 | 2075 // .+ .- ./ .\ .^ .* .** |
| 1554 | 2076 case '.': |
| 2077 { | |
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2078 int c1 = text_yyinput (); |
| 3246 | 2079 |
| 3774 | 2080 if (match_any (c1, "+-/\\^*")) |
| 2081 // Always a binary op (may also include .+=, .-=, ./=, ...). | |
| 2082 bin_op = true; | |
| 3698 | 2083 else if (! isdigit (c1) && c1 != ' ' && c1 != '\t' && c1 != '.') |
| 3774 | 2084 // A structure element reference is a binary op. |
| 2085 bin_op = true; | |
| 3246 | 2086 |
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2087 xunput (c1, yytext); |
| 1554 | 2088 } |
| 2089 break; | |
| 2090 | |
| 3246 | 2091 // = == & && | || * ** |
| 2092 case '=': | |
| 1 | 2093 case '&': |
| 3246 | 2094 case '|': |
| 1 | 2095 case '*': |
| 3774 | 2096 // Always a binary op (may also include ==, &&, ||, **). |
| 2097 bin_op = true; | |
| 3246 | 2098 break; |
| 2099 | |
| 3774 | 2100 // < <= <> > >= |
| 1 | 2101 case '<': |
| 2102 case '>': | |
| 3774 | 2103 // Always a binary op (may also include <=, <>, >=). |
| 2104 bin_op = true; | |
| 2105 break; | |
| 2106 | |
| 2107 // ~= != | |
| 777 | 2108 case '~': |
| 2109 case '!': | |
| 3246 | 2110 { |
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2111 int c1 = text_yyinput (); |
| 3246 | 2112 |
| 3774 | 2113 // ~ and ! can be unary ops, so require following =. |
| 2114 if (c1 == '=') | |
| 2115 bin_op = true; | |
| 3246 | 2116 |
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2117 xunput (c1, yytext); |
| 3246 | 2118 } |
| 1 | 2119 break; |
| 2120 | |
| 2121 default: | |
| 1276 | 2122 break; |
| 1 | 2123 } |
| 2124 | |
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2125 xunput (c0, yytext); |
| 1 | 2126 |
| 2127 return bin_op; | |
| 2128 } | |
| 2129 | |
| 767 | 2130 // Used to delete trailing white space from tokens. |
| 2131 | |
| 3536 | 2132 static std::string |
| 1 | 2133 strip_trailing_whitespace (char *s) |
| 2134 { | |
| 3523 | 2135 std::string retval = s; |
| 1 | 2136 |
| 1823 | 2137 size_t pos = retval.find_first_of (" \t"); |
| 1 | 2138 |
| 8021 | 2139 if (pos != std::string::npos) |
| 1823 | 2140 retval.resize (pos); |
| 1 | 2141 |
| 2142 return retval; | |
| 2143 } | |
| 2144 | |
|
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2145 // FIXME -- we need to handle block comments here. |
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2146 |
| 3665 | 2147 static void |
| 2148 scan_for_comments (const char *text) | |
| 2149 { | |
| 2150 std::string comment_buf; | |
| 2151 | |
| 2152 bool in_comment = false; | |
| 2153 bool beginning_of_comment = false; | |
| 2154 | |
| 2155 int len = strlen (text); | |
| 2156 int i = 0; | |
| 2157 | |
| 2158 while (i < len) | |
| 2159 { | |
| 2160 char c = text[i++]; | |
| 2161 | |
| 2162 switch (c) | |
| 2163 { | |
| 2164 case '%': | |
| 2165 case '#': | |
| 2166 if (in_comment) | |
| 2167 { | |
| 2168 if (! beginning_of_comment) | |
| 3802 | 2169 comment_buf += static_cast<char> (c); |
| 3665 | 2170 } |
| 2171 else | |
| 2172 { | |
| 4037 | 2173 maybe_gripe_matlab_incompatible_comment (c); |
| 3665 | 2174 in_comment = true; |
| 2175 beginning_of_comment = true; | |
| 2176 } | |
| 2177 break; | |
| 2178 | |
| 2179 case '\n': | |
| 2180 if (in_comment) | |
| 2181 { | |
| 3802 | 2182 comment_buf += static_cast<char> (c); |
| 3665 | 2183 octave_comment_buffer::append (comment_buf); |
| 2184 comment_buf.resize (0); | |
| 2185 in_comment = false; | |
| 2186 beginning_of_comment = false; | |
| 2187 } | |
| 2188 break; | |
| 2189 | |
| 2190 default: | |
| 2191 if (in_comment) | |
| 2192 { | |
| 3802 | 2193 comment_buf += static_cast<char> (c); |
| 3665 | 2194 beginning_of_comment = false; |
| 2195 } | |
| 2196 break; | |
| 2197 } | |
| 2198 } | |
| 2199 | |
| 2200 if (! comment_buf.empty ()) | |
| 2201 octave_comment_buffer::append (comment_buf); | |
| 2202 } | |
| 2203 | |
| 1001 | 2204 // Discard whitespace, including comments and continuations. |
| 1088 | 2205 // |
| 2206 // Return value is logical OR of the following values: | |
| 2207 // | |
| 1826 | 2208 // ATE_NOTHING : no spaces to eat |
| 1088 | 2209 // ATE_SPACE_OR_TAB : space or tab in input |
| 2210 // ATE_NEWLINE : bare new line in input | |
| 1001 | 2211 |
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2212 // FIXME -- we need to handle block comments here. |
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2213 |
| 1826 | 2214 static yum_yum |
| 975 | 2215 eat_whitespace (void) |
| 2216 { | |
| 1826 | 2217 yum_yum retval = ATE_NOTHING; |
| 3665 | 2218 |
| 2219 std::string comment_buf; | |
| 2220 | |
| 2857 | 2221 bool in_comment = false; |
| 3665 | 2222 bool beginning_of_comment = false; |
| 2223 | |
| 2224 int c = 0; | |
| 2225 | |
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2226 while ((c = text_yyinput ()) != EOF) |
| 975 | 2227 { |
| 2228 current_input_column++; | |
| 2229 | |
| 2230 switch (c) | |
| 2231 { | |
| 2232 case ' ': | |
| 2233 case '\t': | |
| 3665 | 2234 if (in_comment) |
| 2235 { | |
| 3802 | 2236 comment_buf += static_cast<char> (c); |
| 3665 | 2237 beginning_of_comment = false; |
| 2238 } | |
| 1088 | 2239 retval |= ATE_SPACE_OR_TAB; |
| 975 | 2240 break; |
| 2241 | |
| 2242 case '\n': | |
| 1088 | 2243 retval |= ATE_NEWLINE; |
| 3665 | 2244 if (in_comment) |
| 2245 { | |
| 3802 | 2246 comment_buf += static_cast<char> (c); |
| 3665 | 2247 octave_comment_buffer::append (comment_buf); |
| 2248 comment_buf.resize (0); | |
| 2249 in_comment = false; | |
| 2250 beginning_of_comment = false; | |
| 2251 } | |
| 975 | 2252 current_input_column = 0; |
| 2253 break; | |
| 2254 | |
| 2255 case '#': | |
| 2256 case '%': | |
| 3665 | 2257 if (in_comment) |
| 2258 { | |
| 2259 if (! beginning_of_comment) | |
| 3802 | 2260 comment_buf += static_cast<char> (c); |
| 3665 | 2261 } |
| 2262 else | |
| 2263 { | |
| 4037 | 2264 maybe_gripe_matlab_incompatible_comment (c); |
| 3665 | 2265 in_comment = true; |
| 2266 beginning_of_comment = true; | |
| 2267 } | |
| 975 | 2268 break; |
| 2269 | |
| 1001 | 2270 case '.': |
| 2271 if (in_comment) | |
| 3665 | 2272 { |
| 3802 | 2273 comment_buf += static_cast<char> (c); |
| 3665 | 2274 beginning_of_comment = false; |
| 2275 break; | |
| 2276 } | |
| 1001 | 2277 else |
| 2278 { | |
| 2279 if (have_ellipsis_continuation ()) | |
| 2280 break; | |
| 2281 else | |
| 2282 goto done; | |
| 2283 } | |
| 2284 | |
| 2285 case '\\': | |
| 2286 if (in_comment) | |
| 3665 | 2287 { |
| 3802 | 2288 comment_buf += static_cast<char> (c); |
| 3665 | 2289 beginning_of_comment = false; |
| 2290 break; | |
| 2291 } | |
| 1001 | 2292 else |
| 2293 { | |
| 3105 | 2294 if (have_continuation ()) |
| 1001 | 2295 break; |
| 2296 else | |
| 2297 goto done; | |
| 2298 } | |
| 2299 | |
| 975 | 2300 default: |
| 2301 if (in_comment) | |
| 3665 | 2302 { |
| 3802 | 2303 comment_buf += static_cast<char> (c); |
| 3665 | 2304 beginning_of_comment = false; |
| 2305 break; | |
| 2306 } | |
| 975 | 2307 else |
| 2308 goto done; | |
| 2309 } | |
| 2310 } | |
| 2311 | |
| 3665 | 2312 if (! comment_buf.empty ()) |
| 2313 octave_comment_buffer::append (comment_buf); | |
| 2314 | |
| 975 | 2315 done: |
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2316 xunput (c, yytext); |
| 1082 | 2317 current_input_column--; |
| 1001 | 2318 return retval; |
| 975 | 2319 } |
| 2320 | |
| 3220 | 2321 static inline bool |
| 2322 looks_like_hex (const char *s, int len) | |
| 2323 { | |
| 2324 return (len > 2 && s[0] == '0' && (s[1] == 'x' || s[1] == 'X')); | |
| 2325 } | |
| 2326 | |
| 975 | 2327 static void |
| 3246 | 2328 handle_number (void) |
| 972 | 2329 { |
| 3220 | 2330 double value = 0.0; |
| 2331 int nread = 0; | |
| 2332 | |
| 3598 | 2333 if (looks_like_hex (yytext, strlen (yytext))) |
| 3220 | 2334 { |
| 2335 unsigned long ival; | |
| 3598 | 2336 |
| 2337 nread = sscanf (yytext, "%lx", &ival); | |
| 2338 | |
| 3220 | 2339 value = static_cast<double> (ival); |
| 2340 } | |
| 2341 else | |
| 3598 | 2342 { |
| 2343 char *tmp = strsave (yytext); | |
| 2344 | |
| 2345 char *idx = strpbrk (tmp, "Dd"); | |
| 2621 | 2346 |
| 3598 | 2347 if (idx) |
| 2348 *idx = 'e'; | |
| 2349 | |
| 2350 nread = sscanf (tmp, "%lf", &value); | |
| 2351 | |
| 2352 delete [] tmp; | |
| 2353 } | |
| 972 | 2354 |
| 1826 | 2355 // If yytext doesn't contain a valid number, we are in deep doo doo. |
| 985 | 2356 |
| 972 | 2357 assert (nread == 1); |
| 2358 | |
| 3988 | 2359 lexer_flags.quote_is_transpose = true; |
| 2360 lexer_flags.convert_spaces_to_comma = true; | |
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2361 lexer_flags.looking_for_object_index = true; |
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|
2362 lexer_flags.at_beginning_of_statement = false; |
| 972 | 2363 |
| 2364 yylval.tok_val = new token (value, yytext, input_line_number, | |
| 2365 current_input_column); | |
| 2366 | |
| 2367 token_stack.push (yylval.tok_val); | |
| 2368 | |
| 2369 current_input_column += yyleng; | |
| 2370 | |
| 2371 do_comma_insert_check (); | |
| 2372 } | |
| 2373 | |
| 1001 | 2374 // We have seen a backslash and need to find out if it should be |
| 2375 // treated as a continuation character. If so, this eats it, up to | |
| 2376 // and including the new line character. | |
| 2377 // | |
| 973 | 2378 // Match whitespace only, followed by a comment character or newline. |
| 2379 // Once a comment character is found, discard all input until newline. | |
| 2380 // If non-whitespace characters are found before comment | |
| 2381 // characters, return 0. Otherwise, return 1. | |
| 2382 | |
|
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7722
diff
changeset
|
2383 // FIXME -- we need to handle block comments here. |
|
74f5e0c7de9e
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7722
diff
changeset
|
2384 |
| 2857 | 2385 static bool |
| 3096 | 2386 have_continuation (bool trailing_comments_ok) |
| 973 | 2387 { |
| 5765 | 2388 std::ostringstream buf; |
| 973 | 2389 |
| 3665 | 2390 std::string comment_buf; |
| 2391 | |
| 2857 | 2392 bool in_comment = false; |
| 3665 | 2393 bool beginning_of_comment = false; |
| 2394 | |
| 2395 int c = 0; | |
| 2396 | |
|
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7723
diff
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|
2397 while ((c = text_yyinput ()) != EOF) |
| 973 | 2398 { |
| 3802 | 2399 buf << static_cast<char> (c); |
| 973 | 2400 |
| 2401 switch (c) | |
| 2402 { | |
| 2403 case ' ': | |
| 2404 case '\t': | |
| 3665 | 2405 if (in_comment) |
| 2406 { | |
| 3802 | 2407 comment_buf += static_cast<char> (c); |
| 3665 | 2408 beginning_of_comment = false; |
| 2409 } | |
| 973 | 2410 break; |
| 2411 | |
| 2412 case '%': | |
| 2413 case '#': | |
| 1091 | 2414 if (trailing_comments_ok) |
| 3665 | 2415 { |
| 2416 if (in_comment) | |
| 2417 { | |
| 2418 if (! beginning_of_comment) | |
| 3802 | 2419 comment_buf += static_cast<char> (c); |
| 3665 | 2420 } |
| 2421 else | |
| 2422 { | |
| 4037 | 2423 maybe_gripe_matlab_incompatible_comment (c); |
| 3665 | 2424 in_comment = true; |
| 2425 beginning_of_comment = true; | |
| 2426 } | |
| 2427 } | |
| 1091 | 2428 else |
| 2429 goto cleanup; | |
| 973 | 2430 break; |
| 2431 | |
| 2432 case '\n': | |
| 3665 | 2433 if (in_comment) |
| 2434 { | |
| 3802 | 2435 comment_buf += static_cast<char> (c); |
| 3665 | 2436 octave_comment_buffer::append (comment_buf); |
| 2437 } | |
| 975 | 2438 current_input_column = 0; |
| 1001 | 2439 promptflag--; |
| 4037 | 2440 gripe_matlab_incompatible_continuation (); |
| 2857 | 2441 return true; |
| 973 | 2442 |
| 2443 default: | |
| 3665 | 2444 if (in_comment) |
| 2445 { | |
| 3802 | 2446 comment_buf += static_cast<char> (c); |
| 3665 | 2447 beginning_of_comment = false; |
| 2448 } | |
| 2449 else | |
| 1091 | 2450 goto cleanup; |
| 2451 break; | |
| 973 | 2452 } |
| 2453 } | |
| 2454 | |
|
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diff
changeset
|
2455 xunput (c, yytext); |
| 2857 | 2456 return false; |
| 973 | 2457 |
| 3096 | 2458 cleanup: |
| 4051 | 2459 |
| 5765 | 2460 std::string s = buf.str (); |
| 4051 | 2461 |
| 2462 int len = s.length (); | |
| 2463 while (len--) | |
|
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|
2464 xunput (s[len], yytext); |
| 3096 | 2465 |
| 2857 | 2466 return false; |
| 973 | 2467 } |
| 2468 | |
| 1001 | 2469 // We have seen a `.' and need to see if it is the start of a |
| 2470 // continuation. If so, this eats it, up to and including the new | |
| 2471 // line character. | |
| 2472 | |
| 2857 | 2473 static bool |
| 3096 | 2474 have_ellipsis_continuation (bool trailing_comments_ok) |
| 973 | 2475 { |
|
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diff
changeset
|
2476 char c1 = text_yyinput (); |
| 973 | 2477 if (c1 == '.') |
| 2478 { | |
|
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diff
changeset
|
2479 char c2 = text_yyinput (); |
| 1091 | 2480 if (c2 == '.' && have_continuation (trailing_comments_ok)) |
| 2857 | 2481 return true; |
| 973 | 2482 else |
| 2483 { | |
|
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John W. Eaton <jwe@octave.org>
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changeset
|
2484 xunput (c2, yytext); |
|
adab48231a03
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diff
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|
2485 xunput (c1, yytext); |
| 973 | 2486 } |
| 2487 } | |
| 2488 else | |
|
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|
2489 xunput (c1, yytext); |
| 973 | 2490 |
| 2857 | 2491 return false; |
| 973 | 2492 } |
| 2493 | |
| 1001 | 2494 // See if we have a continuation line. If so, eat it and the leading |
| 2495 // whitespace on the next line. | |
| 1088 | 2496 // |
| 2497 // Return value is the same as described for eat_whitespace(). | |
| 1001 | 2498 |
| 1826 | 2499 static yum_yum |
| 1001 | 2500 eat_continuation (void) |
| 2501 { | |
| 1826 | 2502 int retval = ATE_NOTHING; |
| 3665 | 2503 |
|
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changeset
|
2504 int c = text_yyinput (); |
| 3665 | 2505 |
| 1001 | 2506 if ((c == '.' && have_ellipsis_continuation ()) |
| 3105 | 2507 || (c == '\\' && have_continuation ())) |
| 1001 | 2508 retval = eat_whitespace (); |
| 2509 else | |
|
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diff
changeset
|
2510 xunput (c, yytext); |
| 1001 | 2511 |
| 2512 return retval; | |
| 2513 } | |
| 2514 | |
| 973 | 2515 static int |
|
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John W. Eaton <jwe@octave.org>
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8745
diff
changeset
|
2516 handle_string (char delim) |
| 973 | 2517 { |
| 5765 | 2518 std::ostringstream buf; |
| 973 | 2519 |
| 3805 | 2520 int bos_line = input_line_number; |
| 2521 int bos_col = current_input_column; | |
| 2522 | |
| 973 | 2523 int c; |
| 1031 | 2524 int escape_pending = 0; |
| 973 | 2525 |
|
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John W. Eaton <jwe@octave.org>
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7723
diff
changeset
|
2526 while ((c = text_yyinput ()) != EOF) |
| 973 | 2527 { |
| 2528 current_input_column++; | |
| 2529 | |
| 3105 | 2530 if (c == '\\') |
| 973 | 2531 { |
| 5359 | 2532 if (delim == '\'' || escape_pending) |
| 1053 | 2533 { |
| 3802 | 2534 buf << static_cast<char> (c); |
| 1053 | 2535 escape_pending = 0; |
| 2536 } | |
| 2537 else | |
| 2538 { | |
| 3096 | 2539 if (have_continuation (false)) |
| 1053 | 2540 escape_pending = 0; |
| 2541 else | |
| 2542 { | |
| 3802 | 2543 buf << static_cast<char> (c); |
| 1053 | 2544 escape_pending = 1; |
| 2545 } | |
| 2546 } | |
| 1031 | 2547 continue; |
| 973 | 2548 } |
| 2549 else if (c == '.') | |
| 2550 { | |
| 5359 | 2551 if (delim == '\'' || ! have_ellipsis_continuation (false)) |
| 3802 | 2552 buf << static_cast<char> (c); |
| 973 | 2553 } |
| 2554 else if (c == '\n') | |
| 2555 { | |
| 1053 | 2556 error ("unterminated string constant"); |
| 973 | 2557 break; |
| 2558 } | |
| 2559 else if (c == delim) | |
| 2560 { | |
| 1031 | 2561 if (escape_pending) |
| 3802 | 2562 buf << static_cast<char> (c); |
| 973 | 2563 else |
| 2564 { | |
|
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parents:
7723
diff
changeset
|
2565 c = text_yyinput (); |
| 973 | 2566 if (c == delim) |
| 5102 | 2567 { |
| 2568 buf << static_cast<char> (c); | |
| 2569 } | |
| 973 | 2570 else |
| 2571 { | |
| 5102 | 2572 std::string s; |
|
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diff
changeset
|
2573 xunput (c, yytext); |
| 5765 | 2574 |
|
8746
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diff
changeset
|
2575 if (delim == '\'') |
| 5765 | 2576 s = buf.str (); |
| 5102 | 2577 else |
| 5765 | 2578 s = do_string_escapes (buf.str ()); |
| 975 | 2579 |
|
8746
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diff
changeset
|
2580 lexer_flags.quote_is_transpose = true; |
|
5dd06f19e9be
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John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2581 lexer_flags.convert_spaces_to_comma = true; |
| 975 | 2582 |
| 3805 | 2583 yylval.tok_val = new token (s, bos_line, bos_col); |
| 973 | 2584 token_stack.push (yylval.tok_val); |
| 3400 | 2585 |
| 4037 | 2586 if (delim == '"') |
| 2587 gripe_matlab_incompatible ("\" used as string delimiter"); | |
| 2588 else if (delim == '\'') | |
| 3400 | 2589 gripe_single_quote_string (); |
| 2590 | |
|
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8701
diff
changeset
|
2591 lexer_flags.looking_for_object_index = true; |
|
8746
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John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2592 lexer_flags.at_beginning_of_statement = false; |
|
8745
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John W. Eaton <jwe@octave.org>
parents:
8701
diff
changeset
|
2593 |
| 5279 | 2594 return delim == '"' ? DQ_STRING : SQ_STRING; |
| 973 | 2595 } |
| 2596 } | |
| 2597 } | |
| 2598 else | |
| 2599 { | |
| 3802 | 2600 buf << static_cast<char> (c); |
| 973 | 2601 } |
| 2602 | |
| 1031 | 2603 escape_pending = 0; |
| 973 | 2604 } |
| 2605 | |
| 2606 return LEXICAL_ERROR; | |
| 2607 } | |
| 2608 | |
| 3208 | 2609 static bool |
| 2610 next_token_is_assign_op (void) | |
| 2611 { | |
| 2612 bool retval = false; | |
| 2613 | |
|
7728
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John W. Eaton <jwe@octave.org>
parents:
7723
diff
changeset
|
2614 int c0 = text_yyinput (); |
| 3208 | 2615 |
| 2616 switch (c0) | |
| 2617 { | |
| 2618 case '=': | |
| 2619 { | |
|
7728
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more consistent handling of CR/CRLF/LF line endings in lexer and parser
John W. Eaton <jwe@octave.org>
parents:
7723
diff
changeset
|
2620 int c1 = text_yyinput (); |
|
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8312
diff
changeset
|
2621 xunput (c1, yytext); |
| 3208 | 2622 if (c1 != '=') |
| 2623 retval = true; | |
| 2624 } | |
| 2625 break; | |
| 2626 | |
| 2627 case '+': | |
| 2628 case '-': | |
| 2629 case '*': | |
| 2630 case '/': | |
| 2631 case '\\': | |
| 2632 case '&': | |
| 2633 case '|': | |
| 2634 { | |
|
7728
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more consistent handling of CR/CRLF/LF line endings in lexer and parser
John W. Eaton <jwe@octave.org>
parents:
7723
diff
changeset
|
2635 int c1 = text_yyinput (); |
|
8447
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John W. Eaton <jwe@octave.org>
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diff
changeset
|
2636 xunput (c1, yytext); |
| 3208 | 2637 if (c1 == '=') |
| 2638 retval = true; | |
| 2639 } | |
| 2640 break; | |
| 2641 | |
| 2642 case '.': | |
| 2643 { | |
|
7728
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more consistent handling of CR/CRLF/LF line endings in lexer and parser
John W. Eaton <jwe@octave.org>
parents:
7723
diff
changeset
|
2644 int c1 = text_yyinput (); |
| 3208 | 2645 if (match_any (c1, "+-*/\\")) |
| 2646 { | |
|
7728
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more consistent handling of CR/CRLF/LF line endings in lexer and parser
John W. Eaton <jwe@octave.org>
parents:
7723
diff
changeset
|
2647 int c2 = text_yyinput (); |
|
8447
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diff
changeset
|
2648 xunput (c2, yytext); |
| 3208 | 2649 if (c2 == '=') |
| 2650 retval = true; | |
| 2651 } | |
|
8447
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diff
changeset
|
2652 xunput (c1, yytext); |
| 3208 | 2653 } |
| 2654 break; | |
| 2655 | |
| 2656 case '>': | |
| 2657 { | |
|
7728
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John W. Eaton <jwe@octave.org>
parents:
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diff
changeset
|
2658 int c1 = text_yyinput (); |
| 3208 | 2659 if (c1 == '>') |
| 2660 { | |
|
7728
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changeset
|
2661 int c2 = text_yyinput (); |
|
8447
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diff
changeset
|
2662 xunput (c2, yytext); |
| 3208 | 2663 if (c2 == '=') |
| 2664 retval = true; | |
| 2665 } | |
|
8447
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diff
changeset
|
2666 xunput (c1, yytext); |
| 3208 | 2667 } |
| 2668 break; | |
| 2669 | |
| 2670 case '<': | |
| 2671 { | |
|
7728
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John W. Eaton <jwe@octave.org>
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diff
changeset
|
2672 int c1 = text_yyinput (); |
| 3208 | 2673 if (c1 == '<') |
| 2674 { | |
|
7728
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changeset
|
2675 int c2 = text_yyinput (); |
|
8447
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diff
changeset
|
2676 xunput (c2, yytext); |
| 3208 | 2677 if (c2 == '=') |
| 2678 retval = true; | |
| 2679 } | |
|
8447
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changeset
|
2680 xunput (c1, yytext); |
| 3208 | 2681 } |
| 2682 break; | |
| 2683 | |
| 2684 default: | |
| 2685 break; | |
| 2686 } | |
| 2687 | |
|
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John W. Eaton <jwe@octave.org>
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changeset
|
2688 xunput (c0, yytext); |
| 3208 | 2689 |
| 2690 return retval; | |
| 2691 } | |
| 2692 | |
| 4633 | 2693 static bool |
| 2694 next_token_is_index_op (void) | |
| 2695 { | |
|
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changeset
|
2696 int c = text_yyinput (); |
|
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changeset
|
2697 xunput (c, yytext); |
| 4633 | 2698 return c == '(' || c == '{'; |
| 2699 } | |
| 2700 | |
| 4612 | 2701 static int |
| 2702 handle_close_bracket (bool spc_gobbled, int bracket_type) | |
| 971 | 2703 { |
| 4612 | 2704 int retval = bracket_type; |
| 3208 | 2705 |
| 1826 | 2706 if (! nesting_level.none ()) |
| 971 | 2707 { |
| 1826 | 2708 nesting_level.remove (); |
| 4613 | 2709 |
| 2710 if (bracket_type == ']') | |
| 2711 lexer_flags.bracketflag--; | |
| 2712 else if (bracket_type == '}') | |
| 2713 lexer_flags.braceflag--; | |
| 2714 else | |
| 2715 panic_impossible (); | |
| 971 | 2716 } |
| 2717 | |
| 4613 | 2718 if (lexer_flags.bracketflag == 0 && lexer_flags.braceflag == 0) |
| 4323 | 2719 BEGIN (INITIAL); |
| 1001 | 2720 |
| 4608 | 2721 if (bracket_type == ']' |
| 2722 && next_token_is_assign_op () | |
| 2723 && ! lexer_flags.looking_at_return_list) | |
| 971 | 2724 { |
| 3208 | 2725 retval = CLOSE_BRACE; |
| 971 | 2726 } |
| 4613 | 2727 else if ((lexer_flags.bracketflag || lexer_flags.braceflag) |
| 2728 && lexer_flags.convert_spaces_to_comma | |
| 2729 && (nesting_level.is_bracket () | |
| 2730 || (nesting_level.is_brace () | |
|
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diff
changeset
|
2731 && ! lexer_flags.looking_at_object_index.front ()))) |
| 971 | 2732 { |
| 4633 | 2733 bool index_op = next_token_is_index_op (); |
| 2734 | |
| 2735 // Don't insert comma if we are looking at something like | |
| 2736 // | |
| 2737 // [x{i}{j}] or [x{i}(j)] | |
| 2738 // | |
| 2739 // but do if we are looking at | |
| 2740 // | |
| 2741 // [x{i} {j}] or [x{i} (j)] | |
| 2742 | |
| 2743 if (spc_gobbled || ! (bracket_type == '}' && index_op)) | |
| 971 | 2744 { |
| 4633 | 2745 bool bin_op = next_token_is_bin_op (spc_gobbled); |
| 2746 | |
| 2747 bool postfix_un_op = next_token_is_postfix_unary_op (spc_gobbled); | |
| 2748 | |
| 2749 bool sep_op = next_token_is_sep_op (); | |
| 2750 | |
| 2751 if (! (postfix_un_op || bin_op || sep_op)) | |
| 2752 { | |
| 2753 maybe_warn_separator_insert (','); | |
| 2754 | |
|
8745
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better handling of object indexing in lexer
John W. Eaton <jwe@octave.org>
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8701
diff
changeset
|
2755 xunput (',', yytext); |
| 4633 | 2756 return retval; |
| 2757 } | |
| 971 | 2758 } |
| 2759 } | |
| 2760 | |
| 2857 | 2761 lexer_flags.quote_is_transpose = true; |
| 2762 lexer_flags.convert_spaces_to_comma = true; | |
| 3208 | 2763 |
| 2764 return retval; | |
| 971 | 2765 } |
| 2766 | |
| 1072 | 2767 static void |
| 2768 maybe_unput_comma (int spc_gobbled) | |
| 2769 { | |
| 4613 | 2770 if (nesting_level.is_bracket () |
| 2771 || (nesting_level.is_brace () | |
|
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8701
diff
changeset
|
2772 && ! lexer_flags.looking_at_object_index.front ())) |
| 1072 | 2773 { |
| 3246 | 2774 int bin_op = next_token_is_bin_op (spc_gobbled); |
| 1072 | 2775 |
| 3246 | 2776 int postfix_un_op = next_token_is_postfix_unary_op (spc_gobbled); |
| 1072 | 2777 |
|
7728
13820b9f5fd9
more consistent handling of CR/CRLF/LF line endings in lexer and parser
John W. Eaton <jwe@octave.org>
parents:
7723
diff
changeset
|
2778 int c1 = text_yyinput (); |
|
13820b9f5fd9
more consistent handling of CR/CRLF/LF line endings in lexer and parser
John W. Eaton <jwe@octave.org>
parents:
7723
diff
changeset
|
2779 int c2 = text_yyinput (); |
| 2970 | 2780 |
|
8447
adab48231a03
make input_line_number work again
John W. Eaton <jwe@octave.org>
parents:
8312
diff
changeset
|
2781 xunput (c2, yytext); |
|
adab48231a03
make input_line_number work again
John W. Eaton <jwe@octave.org>
parents:
8312
diff
changeset
|
2782 xunput (c1, yytext); |
| 2970 | 2783 |
| 3263 | 2784 int sep_op = next_token_is_sep_op (); |
| 2970 | 2785 |
| 1072 | 2786 int dot_op = (c1 == '.' |
| 2787 && (isalpha (c2) || isspace (c2) || c2 == '_')); | |
| 2970 | 2788 |
| 3388 | 2789 if (postfix_un_op || bin_op || sep_op || dot_op) |
| 2790 return; | |
| 2791 | |
| 3985 | 2792 int index_op = (c1 == '(' || c1 == '{'); |
| 3388 | 2793 |
| 4476 | 2794 // If there is no space before the indexing op, we don't insert |
| 2795 // a comma. | |
| 2796 | |
| 2797 if (index_op && ! spc_gobbled) | |
| 2798 return; | |
| 2799 | |
| 2800 maybe_warn_separator_insert (','); | |
| 2801 | |
|
8745
6dc61981d18b
better handling of object indexing in lexer
John W. Eaton <jwe@octave.org>
parents:
8701
diff
changeset
|
2802 xunput (',', yytext); |
| 1072 | 2803 } |
| 2804 } | |
| 2805 | |
|
8746
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2806 static bool |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2807 next_token_can_follow_bin_op (void) |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2808 { |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2809 std::stack<char> buf; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2810 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2811 int c = EOF; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2812 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2813 // Skip whitespace in current statement on current line |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2814 while (true) |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2815 { |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2816 c = text_yyinput (); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2817 |
|
8767
026c6732ec7a
lex.l (next_token_can_follow_bin_op): push all characters read on to buffer stack
John W. Eaton <jwe@octave.org>
parents:
8746
diff
changeset
|
2818 buf.push (c); |
|
026c6732ec7a
lex.l (next_token_can_follow_bin_op): push all characters read on to buffer stack
John W. Eaton <jwe@octave.org>
parents:
8746
diff
changeset
|
2819 |
|
026c6732ec7a
lex.l (next_token_can_follow_bin_op): push all characters read on to buffer stack
John W. Eaton <jwe@octave.org>
parents:
8746
diff
changeset
|
2820 if (match_any (c, ",;\n") || (c != ' ' && c != '\t')) |
|
8746
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2821 break; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2822 } |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2823 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2824 // Restore input. |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2825 while (! buf.empty ()) |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2826 { |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2827 xunput (buf.top (), yytext); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2828 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2829 buf.pop (); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2830 } |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2831 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2832 return (isalnum (c) || match_any (c, "!\"'(-[_{~")); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2833 } |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2834 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2835 static bool |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2836 looks_like_command_arg (void) |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2837 { |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2838 bool retval = true; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2839 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2840 int c0 = text_yyinput (); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2841 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2842 switch (c0) |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2843 { |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2844 // = == |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2845 case '=': |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2846 { |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2847 int c1 = text_yyinput (); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2848 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2849 if (c1 == '=') |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2850 { |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2851 int c2 = text_yyinput (); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2852 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2853 if (! match_any (c2, ",;\n") && (c2 == ' ' || c2 == '\t') |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2854 && next_token_can_follow_bin_op ()) |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2855 retval = false; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2856 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2857 xunput (c2, yytext); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2858 } |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2859 else |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2860 retval = false; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2861 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2862 xunput (c1, yytext); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2863 } |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2864 break; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2865 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2866 case '(': |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2867 case '{': |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2868 // Indexing. |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2869 retval = false; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2870 break; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2871 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2872 case '\n': |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2873 // EOL. |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2874 break; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2875 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2876 case '\'': |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2877 case '"': |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2878 // Beginning of a character string. |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2879 break; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2880 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2881 // + - ++ -- += -= |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2882 case '+': |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2883 case '-': |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2884 { |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2885 int c1 = text_yyinput (); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2886 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2887 switch (c1) |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2888 { |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2889 case '\n': |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2890 // EOL. |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2891 case '+': |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2892 case '-': |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2893 // Unary ops, spacing doesn't matter. |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2894 break; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2895 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2896 case '\t': |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2897 case ' ': |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2898 { |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2899 if (next_token_can_follow_bin_op ()) |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2900 retval = false; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2901 } |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2902 break; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2903 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2904 case '=': |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2905 { |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2906 int c2 = text_yyinput (); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2907 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2908 if (! match_any (c2, ",;\n") && (c2 == ' ' || c2 == '\t') |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2909 && next_token_can_follow_bin_op ()) |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2910 retval = false; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2911 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2912 xunput (c2, yytext); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2913 } |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2914 break; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2915 } |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2916 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2917 xunput (c1, yytext); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2918 } |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2919 break; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2920 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2921 case ':': |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2922 case '/': |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2923 case '\\': |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2924 case '^': |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2925 { |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2926 int c1 = text_yyinput (); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2927 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2928 if (! match_any (c1, ",;\n") && (c1 == ' ' || c1 == '\t') |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2929 && next_token_can_follow_bin_op ()) |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2930 retval = false; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2931 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2932 xunput (c1, yytext); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2933 } |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2934 break; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2935 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2936 // .+ .- ./ .\ .^ .* .** |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2937 case '.': |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2938 { |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2939 int c1 = text_yyinput (); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2940 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2941 if (match_any (c1, "+-/\\^*")) |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2942 { |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2943 int c2 = text_yyinput (); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2944 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2945 if (c2 == '=') |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2946 { |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2947 int c3 = text_yyinput (); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2948 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2949 if (! match_any (c3, ",;\n") && (c3 == ' ' || c3 == '\t') |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2950 && next_token_can_follow_bin_op ()) |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2951 retval = false; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2952 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2953 xunput (c3, yytext); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2954 } |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2955 else if (! match_any (c2, ",;\n") && (c2 == ' ' || c2 == '\t') |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2956 && next_token_can_follow_bin_op ()) |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2957 retval = false; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2958 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2959 xunput (c2, yytext); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2960 } |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2961 else if (! match_any (c1, ",;\n") |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2962 && (! isdigit (c1) && c1 != ' ' && c1 != '\t' |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2963 && c1 != '.')) |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2964 { |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2965 // Structure reference. FIXME -- is this a complete check? |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2966 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2967 retval = false; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2968 } |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2969 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2970 xunput (c1, yytext); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2971 } |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2972 break; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2973 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2974 // & && | || * ** |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2975 case '&': |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2976 case '|': |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2977 case '*': |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2978 { |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2979 int c1 = text_yyinput (); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2980 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2981 if (c1 == c0) |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2982 { |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2983 int c2 = text_yyinput (); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2984 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2985 if (! match_any (c2, ",;\n") && (c2 == ' ' || c2 == '\t') |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2986 && next_token_can_follow_bin_op ()) |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2987 retval = false; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2988 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2989 xunput (c2, yytext); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2990 } |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2991 else if (! match_any (c1, ",;\n") && (c1 == ' ' || c1 == '\t') |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2992 && next_token_can_follow_bin_op ()) |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2993 retval = false; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2994 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2995 xunput (c1, yytext); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2996 } |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2997 break; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2998 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
2999 // < <= > >= |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3000 case '<': |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3001 case '>': |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3002 { |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3003 int c1 = text_yyinput (); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3004 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3005 if (c1 == '=') |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3006 { |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3007 int c2 = text_yyinput (); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3008 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3009 if (! match_any (c2, ",;\n") && (c2 == ' ' || c2 == '\t') |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3010 && next_token_can_follow_bin_op ()) |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3011 retval = false; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3012 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3013 xunput (c2, yytext); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3014 } |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3015 else if (! match_any (c1, ",;\n") && (c1 == ' ' || c1 == '\t') |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3016 && next_token_can_follow_bin_op ()) |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3017 retval = false; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3018 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3019 xunput (c1, yytext); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3020 } |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3021 break; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3022 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3023 // ~= != |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3024 case '~': |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3025 case '!': |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3026 { |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3027 int c1 = text_yyinput (); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3028 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3029 // ~ and ! can be unary ops, so require following =. |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3030 if (c1 == '=') |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3031 { |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3032 int c2 = text_yyinput (); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3033 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3034 if (! match_any (c2, ",;\n") && (c2 == ' ' || c2 == '\t') |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3035 && next_token_can_follow_bin_op ()) |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3036 retval = false; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3037 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3038 xunput (c2, yytext); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3039 } |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3040 else if (! match_any (c1, ",;\n") && (c1 == ' ' || c1 == '\t') |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3041 && next_token_can_follow_bin_op ()) |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3042 retval = false; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3043 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3044 xunput (c1, yytext); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3045 } |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3046 break; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3047 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3048 default: |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3049 break; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3050 } |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3051 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3052 xunput (c0, yytext); |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3053 |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3054 return retval; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3055 } |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3056 |
| 9476 | 3057 static int |
| 3058 handle_superclass_identifier (void) | |
| 3059 { | |
| 3060 eat_continuation (); | |
| 3061 | |
| 3062 std::string pkg; | |
| 3063 std::string meth = strip_trailing_whitespace (yytext); | |
| 3064 size_t pos = meth.find ("@"); | |
| 3065 std::string cls = meth.substr (pos).substr (1); | |
| 3066 meth = meth.substr (0, pos - 1); | |
| 3067 | |
| 3068 pos = cls.find ("."); | |
| 3069 if (pos != std::string::npos) | |
| 3070 { | |
| 3071 pkg = cls.substr (pos).substr (1); | |
| 3072 cls = cls.substr (0, pos - 1); | |
| 3073 } | |
| 3074 | |
| 3075 int kw_token = (is_keyword_token (meth) || is_keyword_token (cls) | |
| 3076 || is_keyword_token (pkg)); | |
| 3077 if (kw_token) | |
| 3078 { | |
| 3079 error ("method, class and package names may not be keywords"); | |
| 3080 return LEXICAL_ERROR; | |
| 3081 } | |
| 3082 | |
| 3083 yylval.tok_val | |
| 3084 = new token (meth.empty () ? 0 : &(symbol_table::insert (meth)), | |
| 3085 cls.empty () ? 0 : &(symbol_table::insert (cls)), | |
| 3086 pkg.empty () ? 0 : &(symbol_table::insert (pkg)), | |
| 3087 input_line_number, current_input_column); | |
| 3088 token_stack.push (yylval.tok_val); | |
| 3089 | |
| 3090 lexer_flags.convert_spaces_to_comma = true; | |
| 3091 current_input_column += yyleng; | |
| 3092 | |
| 3093 return SUPERCLASSREF; | |
| 3094 } | |
| 3095 | |
| 3096 static int | |
| 3097 handle_meta_identifier (void) | |
| 3098 { | |
| 3099 eat_continuation (); | |
| 3100 | |
| 3101 std::string pkg; | |
| 3102 std::string cls = strip_trailing_whitespace (yytext).substr (1); | |
| 3103 size_t pos = cls.find ("."); | |
| 3104 | |
| 3105 if (pos != std::string::npos) | |
| 3106 { | |
| 3107 pkg = cls.substr (pos).substr (1); | |
| 3108 cls = cls.substr (0, pos - 1); | |
| 3109 } | |
| 3110 | |
| 3111 int kw_token = is_keyword_token (cls) || is_keyword_token (pkg); | |
| 3112 if (kw_token) | |
| 3113 { | |
| 3114 error ("class and package names may not be keywords"); | |
| 3115 return LEXICAL_ERROR; | |
| 3116 } | |
| 3117 | |
| 3118 yylval.tok_val | |
| 3119 = new token (cls.empty () ? 0 : &(symbol_table::insert (cls)), | |
| 3120 pkg.empty () ? 0 : &(symbol_table::insert (pkg)), | |
| 3121 input_line_number, current_input_column); | |
| 3122 | |
| 3123 token_stack.push (yylval.tok_val); | |
| 3124 | |
| 3125 lexer_flags.convert_spaces_to_comma = true; | |
| 3126 current_input_column += yyleng; | |
| 3127 | |
| 3128 return METAQUERY; | |
| 3129 } | |
| 3130 | |
| 767 | 3131 // Figure out exactly what kind of token to return when we have seen |
| 4238 | 3132 // an identifier. Handles keywords. Return -1 if the identifier |
| 3133 // should be ignored. | |
| 767 | 3134 |
| 146 | 3135 static int |
| 3974 | 3136 handle_identifier (void) |
| 146 | 3137 { |
|
8746
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3138 bool at_bos = lexer_flags.at_beginning_of_statement; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3139 |
| 3974 | 3140 std::string tok = strip_trailing_whitespace (yytext); |
| 3141 | |
| 3142 int c = yytext[yyleng-1]; | |
| 3143 | |
| 3144 int cont_is_spc = eat_continuation (); | |
| 3145 | |
| 3146 int spc_gobbled = (cont_is_spc || c == ' ' || c == '\t'); | |
| 3147 | |
| 2970 | 3148 // If we are expecting a structure element, avoid recognizing |
| 3149 // keywords and other special names and return STRUCT_ELT, which is | |
| 3150 // a string that is also a valid identifier. But first, we have to | |
| 3151 // decide whether to insert a comma. | |
| 747 | 3152 |
| 1826 | 3153 if (lexer_flags.looking_at_indirect_ref) |
| 1072 | 3154 { |
| 2970 | 3155 do_comma_insert_check (); |
| 3156 | |
| 1072 | 3157 maybe_unput_comma (spc_gobbled); |
| 2819 | 3158 |
| 3159 yylval.tok_val = new token (tok, input_line_number, | |
| 3160 current_input_column); | |
| 3161 | |
| 3162 token_stack.push (yylval.tok_val); | |
| 3163 | |
| 2857 | 3164 lexer_flags.quote_is_transpose = true; |
| 3165 lexer_flags.convert_spaces_to_comma = true; | |
|
9324
29563379fa9b
don't look for object index after keyword
John W. Eaton <jwe@octave.org>
parents:
8974
diff
changeset
|
3166 lexer_flags.looking_for_object_index = true; |
| 2819 | 3167 |
| 3168 current_input_column += yyleng; | |
| 3169 | |
| 2970 | 3170 return STRUCT_ELT; |
| 1072 | 3171 } |
| 747 | 3172 |
|
8746
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3173 lexer_flags.at_beginning_of_statement = false; |
|
5dd06f19e9be
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John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3174 |
|
5dd06f19e9be
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John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3175 // The is_keyword_token may reset |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3176 // lexer_flags.at_beginning_of_statement. For example, if it sees |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3177 // an else token, then the next token is at the beginning of a |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3178 // statement. |
|
5dd06f19e9be
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John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3179 |
| 4930 | 3180 int kw_token = is_keyword_token (tok); |
| 3181 | |
|
8746
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3182 // If we found a keyword token, then the beginning_of_statement flag |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3183 // is already set. Otherwise, we won't be at the beginning of a |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3184 // statement. |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3185 |
| 4930 | 3186 if (lexer_flags.looking_at_function_handle) |
| 3187 { | |
| 3188 if (kw_token) | |
| 3189 { | |
| 3190 error ("function handles may not refer to keywords"); | |
| 3191 | |
| 3192 return LEXICAL_ERROR; | |
| 3193 } | |
| 3194 else | |
|
7722
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3195 { |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3196 yylval.tok_val = new token (tok, input_line_number, |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3197 current_input_column); |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3198 |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3199 token_stack.push (yylval.tok_val); |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3200 |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3201 current_input_column += yyleng; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3202 lexer_flags.quote_is_transpose = false; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3203 lexer_flags.convert_spaces_to_comma = true; |
|
9324
29563379fa9b
don't look for object index after keyword
John W. Eaton <jwe@octave.org>
parents:
8974
diff
changeset
|
3204 lexer_flags.looking_for_object_index = true; |
|
7722
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3205 |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3206 return FCN_HANDLE; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3207 } |
| 4930 | 3208 } |
| 3209 | |
| 5102 | 3210 // If we have a regular keyword, return it. |
|
7722
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3211 // Keywords can be followed by identifiers. |
| 146 | 3212 |
| 3213 if (kw_token) | |
| 3214 { | |
|
7722
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3215 if (kw_token >= 0) |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3216 { |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3217 current_input_column += yyleng; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3218 lexer_flags.quote_is_transpose = false; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3219 lexer_flags.convert_spaces_to_comma = true; |
|
9324
29563379fa9b
don't look for object index after keyword
John W. Eaton <jwe@octave.org>
parents:
8974
diff
changeset
|
3220 lexer_flags.looking_for_object_index = false; |
|
7722
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3221 } |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3222 |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3223 return kw_token; |
| 146 | 3224 } |
| 3225 | |
| 1826 | 3226 // See if we have a plot keyword (title, using, with, or clear). |
| 146 | 3227 |
|
7728
13820b9f5fd9
more consistent handling of CR/CRLF/LF line endings in lexer and parser
John W. Eaton <jwe@octave.org>
parents:
7723
diff
changeset
|
3228 int c1 = text_yyinput (); |
| 3480 | 3229 |
| 3230 bool next_tok_is_eq = false; | |
| 3231 if (c1 == '=') | |
| 3232 { | |
|
7728
13820b9f5fd9
more consistent handling of CR/CRLF/LF line endings in lexer and parser
John W. Eaton <jwe@octave.org>
parents:
7723
diff
changeset
|
3233 int c2 = text_yyinput (); |
|
8447
adab48231a03
make input_line_number work again
John W. Eaton <jwe@octave.org>
parents:
8312
diff
changeset
|
3234 xunput (c2, yytext); |
| 3480 | 3235 |
| 3236 if (c2 != '=') | |
| 3237 next_tok_is_eq = true; | |
| 3238 } | |
| 3239 | |
|
8447
adab48231a03
make input_line_number work again
John W. Eaton <jwe@octave.org>
parents:
8312
diff
changeset
|
3240 xunput (c1, yytext); |
| 1001 | 3241 |
| 2702 | 3242 // Kluge alert. |
| 3243 // | |
| 3244 // If we are looking at a text style function, set up to gobble its | |
| 2745 | 3245 // arguments. |
| 3246 // | |
| 3247 // If the following token is `=', or if we are parsing a function | |
| 3189 | 3248 // return list or function parameter list, or if we are looking at |
| 3249 // something like [ab,cd] = foo (), force the symbol to be inserted | |
| 3250 // as a variable in the current symbol table. | |
| 2702 | 3251 |
|
8746
5dd06f19e9be
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John W. Eaton <jwe@octave.org>
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8745
diff
changeset
|
3252 if (! is_variable (tok)) |
| 2702 | 3253 { |
|
8746
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3254 if (at_bos && spc_gobbled && looks_like_command_arg ()) |
|
5dd06f19e9be
handle commands in the lexer
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parents:
8745
diff
changeset
|
3255 { |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
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8745
diff
changeset
|
3256 BEGIN (COMMAND_START); |
|
5dd06f19e9be
handle commands in the lexer
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parents:
8745
diff
changeset
|
3257 } |
|
5dd06f19e9be
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8745
diff
changeset
|
3258 else if (next_tok_is_eq |
|
5dd06f19e9be
handle commands in the lexer
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8745
diff
changeset
|
3259 || lexer_flags.looking_at_decl_list |
|
5dd06f19e9be
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parents:
8745
diff
changeset
|
3260 || lexer_flags.looking_at_return_list |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
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8745
diff
changeset
|
3261 || (lexer_flags.looking_at_parameter_list |
|
5dd06f19e9be
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parents:
8745
diff
changeset
|
3262 && ! lexer_flags.looking_at_initializer_expression)) |
| 2745 | 3263 { |
|
8881
8ed42c679af5
after defining a script or function, clear local variables created for parsing
John W. Eaton <jwe@octave.org>
parents:
8812
diff
changeset
|
3264 symbol_table::force_variable (tok); |
| 2745 | 3265 } |
|
8001
ff9e7873f8ea
improve handling of command-style names in matrix_or_assign_lhs context
John W. Eaton <jwe@octave.org>
parents:
7898
diff
changeset
|
3266 else if (lexer_flags.looking_at_matrix_or_assign_lhs) |
|
ff9e7873f8ea
improve handling of command-style names in matrix_or_assign_lhs context
John W. Eaton <jwe@octave.org>
parents:
7898
diff
changeset
|
3267 { |
|
ff9e7873f8ea
improve handling of command-style names in matrix_or_assign_lhs context
John W. Eaton <jwe@octave.org>
parents:
7898
diff
changeset
|
3268 lexer_flags.pending_local_variables.insert (tok); |
|
ff9e7873f8ea
improve handling of command-style names in matrix_or_assign_lhs context
John W. Eaton <jwe@octave.org>
parents:
7898
diff
changeset
|
3269 } |
| 2702 | 3270 } |
| 3271 | |
| 4234 | 3272 // Find the token in the symbol table. Beware the magic |
| 3273 // transformation of the end keyword... | |
| 3274 | |
| 3275 if (tok == "end") | |
| 3276 tok = "__end__"; | |
| 146 | 3277 |
| 7336 | 3278 yylval.tok_val = new token (&(symbol_table::insert (tok)), |
| 3279 input_line_number, current_input_column); | |
| 3280 | |
| 146 | 3281 token_stack.push (yylval.tok_val); |
| 3282 | |
| 1826 | 3283 // After seeing an identifer, it is ok to convert spaces to a comma |
| 3284 // (if needed). | |
| 146 | 3285 |
| 2857 | 3286 lexer_flags.convert_spaces_to_comma = true; |
| 146 | 3287 |
|
8746
5dd06f19e9be
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John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3288 if (! (next_tok_is_eq || YY_START == COMMAND_START)) |
| 2877 | 3289 { |
| 3290 lexer_flags.quote_is_transpose = true; | |
| 146 | 3291 |
| 2877 | 3292 do_comma_insert_check (); |
| 3293 | |
| 3294 maybe_unput_comma (spc_gobbled); | |
| 146 | 3295 } |
| 3296 | |
| 2877 | 3297 current_input_column += yyleng; |
| 146 | 3298 |
|
9324
29563379fa9b
don't look for object index after keyword
John W. Eaton <jwe@octave.org>
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8974
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changeset
|
3299 if (tok != "__end__") |
|
29563379fa9b
don't look for object index after keyword
John W. Eaton <jwe@octave.org>
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8974
diff
changeset
|
3300 lexer_flags.looking_for_object_index = true; |
|
29563379fa9b
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8974
diff
changeset
|
3301 |
| 146 | 3302 return NAME; |
| 3303 } | |
| 3304 | |
| 1826 | 3305 void |
| 3306 lexical_feedback::init (void) | |
| 3307 { | |
| 3308 // Not initially defining a matrix list. | |
| 3351 | 3309 bracketflag = 0; |
| 1826 | 3310 |
| 4613 | 3311 // Not initially defining a cell array list. |
| 3312 braceflag = 0; | |
| 3313 | |
| 1826 | 3314 // Not initially inside a loop or if statement. |
| 3315 looping = 0; | |
| 3316 | |
| 2857 | 3317 // Not initially defining a function. |
| 3318 defining_func = false; | |
| 2877 | 3319 parsed_function_name = false; |
| 7336 | 3320 parsing_class_method = false; |
| 9476 | 3321 |
| 3322 // Not initially defining a class with classdef. | |
| 3323 maybe_classdef_get_set_method = false; | |
| 3324 parsing_classdef = false; | |
| 2857 | 3325 |
| 4930 | 3326 // Not initiallly looking at a function handle. |
| 3327 looking_at_function_handle = 0; | |
| 3328 | |
|
8701
1652e39b934e
handle command names in declaration lists
John W. Eaton <jwe@octave.org>
parents:
8537
diff
changeset
|
3329 // Not parsing a function return, parameter, or declaration list. |
| 2857 | 3330 looking_at_return_list = false; |
| 3331 looking_at_parameter_list = false; | |
|
8701
1652e39b934e
handle command names in declaration lists
John W. Eaton <jwe@octave.org>
parents:
8537
diff
changeset
|
3332 looking_at_decl_list = false; |
| 2857 | 3333 |
|
7634
ae90e05ad299
fix parameter list initializer bug
John W. Eaton <jwe@octave.org>
parents:
7587
diff
changeset
|
3334 // Not looking at an argument list initializer expression. |
|
ae90e05ad299
fix parameter list initializer bug
John W. Eaton <jwe@octave.org>
parents:
7587
diff
changeset
|
3335 looking_at_initializer_expression = false; |
|
ae90e05ad299
fix parameter list initializer bug
John W. Eaton <jwe@octave.org>
parents:
7587
diff
changeset
|
3336 |
| 3796 | 3337 // Not parsing a matrix or the left hand side of multi-value |
| 3338 // assignment statement. | |
| 3339 looking_at_matrix_or_assign_lhs = false; | |
| 3340 | |
| 4234 | 3341 // Not parsing an object index. |
|
8745
6dc61981d18b
better handling of object indexing in lexer
John W. Eaton <jwe@octave.org>
parents:
8701
diff
changeset
|
3342 while (! looking_at_object_index.empty ()) |
|
6dc61981d18b
better handling of object indexing in lexer
John W. Eaton <jwe@octave.org>
parents:
8701
diff
changeset
|
3343 looking_at_object_index.pop_front (); |
|
6dc61981d18b
better handling of object indexing in lexer
John W. Eaton <jwe@octave.org>
parents:
8701
diff
changeset
|
3344 |
|
6dc61981d18b
better handling of object indexing in lexer
John W. Eaton <jwe@octave.org>
parents:
8701
diff
changeset
|
3345 looking_at_object_index.push_front (false); |
|
6dc61981d18b
better handling of object indexing in lexer
John W. Eaton <jwe@octave.org>
parents:
8701
diff
changeset
|
3346 |
|
6dc61981d18b
better handling of object indexing in lexer
John W. Eaton <jwe@octave.org>
parents:
8701
diff
changeset
|
3347 // Object index not possible until we've seen something. |
|
6dc61981d18b
better handling of object indexing in lexer
John W. Eaton <jwe@octave.org>
parents:
8701
diff
changeset
|
3348 looking_for_object_index = false; |
| 4234 | 3349 |
|
8746
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3350 // Yes, we are at the beginning of a statement. |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3351 at_beginning_of_statement = true; |
|
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3352 |
| 2857 | 3353 // No need to do comma insert or convert spaces to comma at |
| 3354 // beginning of input. | |
| 3355 convert_spaces_to_comma = true; | |
| 3356 do_comma_insert = false; | |
| 3357 | |
| 1826 | 3358 // Not initially looking at indirect references. |
| 2857 | 3359 looking_at_indirect_ref = false; |
| 1826 | 3360 |
| 3361 // Quote marks strings intially. | |
| 2857 | 3362 quote_is_transpose = false; |
|
8001
ff9e7873f8ea
improve handling of command-style names in matrix_or_assign_lhs context
John W. Eaton <jwe@octave.org>
parents:
7898
diff
changeset
|
3363 |
|
ff9e7873f8ea
improve handling of command-style names in matrix_or_assign_lhs context
John W. Eaton <jwe@octave.org>
parents:
7898
diff
changeset
|
3364 // Set of identifiers that might be local variable names is empty. |
|
ff9e7873f8ea
improve handling of command-style names in matrix_or_assign_lhs context
John W. Eaton <jwe@octave.org>
parents:
7898
diff
changeset
|
3365 pending_local_variables.clear (); |
| 1826 | 3366 } |
| 3367 | |
| 4867 | 3368 bool |
| 3369 is_keyword (const std::string& s) | |
| 3370 { | |
| 5088 | 3371 return octave_kw_hash::in_word_set (s.c_str (), s.length ()) != 0; |
| 4867 | 3372 } |
| 3373 | |
|
8746
5dd06f19e9be
handle commands in the lexer
John W. Eaton <jwe@octave.org>
parents:
8745
diff
changeset
|
3374 DEFUN (iskeyword, args, , |
| 4264 | 3375 "-*- texinfo -*-\n\ |
| 3376 @deftypefn {Built-in Function} {} iskeyword (@var{name})\n\ | |
| 3377 Return true if @var{name} is an Octave keyword. If @var{name}\n\ | |
| 3378 is omitted, return a list of keywords.\n\ | |
| 3379 @end deftypefn") | |
| 3380 { | |
| 3381 octave_value retval; | |
| 3382 | |
| 3383 int argc = args.length () + 1; | |
| 3384 | |
| 4867 | 3385 string_vector argv = args.make_argv ("iskeyword"); |
| 4264 | 3386 |
| 3387 if (error_state) | |
| 3388 return retval; | |
| 3389 | |
| 3390 if (argc == 1) | |
| 3391 { | |
| 3392 string_vector lst (TOTAL_KEYWORDS); | |
| 3393 | |
| 3394 for (int i = 0; i < TOTAL_KEYWORDS; i++) | |
| 3395 lst[i] = wordlist[i].name; | |
| 3396 | |
|
8504
0e0bd07e6ae2
omission from last patch
Jaroslav Hajek <highegg@gmail.com>
parents:
8447
diff
changeset
|
3397 retval = Cell (lst.sort ()); |
| 4264 | 3398 } |
| 3399 else if (argc == 2) | |
| 3400 { | |
| 4867 | 3401 retval = is_keyword (argv[1]); |
| 4264 | 3402 } |
| 3403 else | |
| 5823 | 3404 print_usage (); |
| 4264 | 3405 |
| 3406 return retval; | |
| 3407 } | |
| 3408 | |
|
7715
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
3409 void |
|
9474
25ed2d6aacf6
Parse nested functions more accurately.
David Grundberg <individ@acc.umu.se>
parents:
9324
diff
changeset
|
3410 prep_lexer_for_script_file (void) |
|
7715
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
3411 { |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
3412 BEGIN (SCRIPT_FILE_BEGIN); |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
3413 } |
| 4264 | 3414 |
|
9474
25ed2d6aacf6
Parse nested functions more accurately.
David Grundberg <individ@acc.umu.se>
parents:
9324
diff
changeset
|
3415 void |
|
25ed2d6aacf6
Parse nested functions more accurately.
David Grundberg <individ@acc.umu.se>
parents:
9324
diff
changeset
|
3416 prep_lexer_for_function_file (void) |
|
25ed2d6aacf6
Parse nested functions more accurately.
David Grundberg <individ@acc.umu.se>
parents:
9324
diff
changeset
|
3417 { |
|
25ed2d6aacf6
Parse nested functions more accurately.
David Grundberg <individ@acc.umu.se>
parents:
9324
diff
changeset
|
3418 BEGIN (FUNCTION_FILE_BEGIN); |
|
25ed2d6aacf6
Parse nested functions more accurately.
David Grundberg <individ@acc.umu.se>
parents:
9324
diff
changeset
|
3419 } |
|
25ed2d6aacf6
Parse nested functions more accurately.
David Grundberg <individ@acc.umu.se>
parents:
9324
diff
changeset
|
3420 |
| 3388 | 3421 static void |
| 3422 maybe_warn_separator_insert (char sep) | |
| 3423 { | |
| 3523 | 3424 std::string nm = curr_fcn_file_full_name; |
| 3388 | 3425 |
| 5794 | 3426 if (nm.empty ()) |
| 3427 warning_with_id ("Octave:separator-insert", | |
| 3428 "potential auto-insertion of `%c' near line %d", | |
| 3429 sep, input_line_number); | |
| 3430 else | |
| 3431 warning_with_id ("Octave:separator-insert", | |
| 3432 "potential auto-insertion of `%c' near line %d of file %s", | |
| 3433 sep, input_line_number, nm.c_str ()); | |
| 3388 | 3434 } |
| 3435 | |
| 3400 | 3436 static void |
| 3437 gripe_single_quote_string (void) | |
| 3438 { | |
| 3523 | 3439 std::string nm = curr_fcn_file_full_name; |
| 3400 | 3440 |
| 5794 | 3441 if (nm.empty ()) |
| 3442 warning_with_id ("Octave:single-quote-string", | |
| 3443 "single quote delimited string near line %d", | |
| 3444 input_line_number); | |
| 3445 else | |
| 3446 warning_with_id ("Octave:single-quote-string", | |
| 3447 "single quote delimited string near line %d of file %s", | |
| 3448 input_line_number, nm.c_str ()); | |
| 3400 | 3449 } |
| 3450 | |
| 4037 | 3451 static void |
| 3452 gripe_matlab_incompatible (const std::string& msg) | |
| 3453 { | |
|
8974
fde2a916b2ac
include line and file info in parser warnings
John W. Eaton <jwe@octave.org>
parents:
8950
diff
changeset
|
3454 std::string nm = curr_fcn_file_full_name; |
|
fde2a916b2ac
include line and file info in parser warnings
John W. Eaton <jwe@octave.org>
parents:
8950
diff
changeset
|
3455 |
|
fde2a916b2ac
include line and file info in parser warnings
John W. Eaton <jwe@octave.org>
parents:
8950
diff
changeset
|
3456 if (nm.empty ()) |
|
fde2a916b2ac
include line and file info in parser warnings
John W. Eaton <jwe@octave.org>
parents:
8950
diff
changeset
|
3457 warning_with_id ("Octave:matlab-incompatible", |
|
fde2a916b2ac
include line and file info in parser warnings
John W. Eaton <jwe@octave.org>
parents:
8950
diff
changeset
|
3458 "potential Matlab compatibility problem: %s", |
|
fde2a916b2ac
include line and file info in parser warnings
John W. Eaton <jwe@octave.org>
parents:
8950
diff
changeset
|
3459 msg.c_str ()); |
|
fde2a916b2ac
include line and file info in parser warnings
John W. Eaton <jwe@octave.org>
parents:
8950
diff
changeset
|
3460 else |
|
fde2a916b2ac
include line and file info in parser warnings
John W. Eaton <jwe@octave.org>
parents:
8950
diff
changeset
|
3461 warning_with_id ("Octave:matlab-incompatible", |
|
fde2a916b2ac
include line and file info in parser warnings
John W. Eaton <jwe@octave.org>
parents:
8950
diff
changeset
|
3462 "potential Matlab compatibility problem: %s near line %d offile %s", |
|
fde2a916b2ac
include line and file info in parser warnings
John W. Eaton <jwe@octave.org>
parents:
8950
diff
changeset
|
3463 msg.c_str (), input_line_number, nm.c_str ()); |
| 4037 | 3464 } |
| 3465 | |
| 3466 static void | |
| 3467 maybe_gripe_matlab_incompatible_comment (char c) | |
| 3468 { | |
| 3469 if (c == '#') | |
| 3470 gripe_matlab_incompatible ("# used as comment character"); | |
| 3471 } | |
| 3472 | |
| 3473 static void | |
| 3474 gripe_matlab_incompatible_continuation (void) | |
| 3475 { | |
| 3476 gripe_matlab_incompatible ("\\ used as line continuation marker"); | |
| 3477 } | |
| 3478 | |
| 3479 static void | |
| 3480 gripe_matlab_incompatible_operator (const std::string& op) | |
| 3481 { | |
| 3482 std::string t = op; | |
| 3483 int n = t.length (); | |
| 3484 if (t[n-1] == '\n') | |
| 3485 t.resize (n-1); | |
| 3486 gripe_matlab_incompatible (t + " used as operator"); | |
| 3487 } | |
| 3488 | |
|
7722
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3489 static void |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3490 display_token (int tok) |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3491 { |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3492 switch (tok) |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3493 { |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3494 case '=': std::cerr << "'='\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3495 case ':': std::cerr << "':'\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3496 case '-': std::cerr << "'-'\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3497 case '+': std::cerr << "'+'\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3498 case '*': std::cerr << "'*'\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3499 case '/': std::cerr << "'/'\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3500 case ADD_EQ: std::cerr << "ADD_EQ\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3501 case SUB_EQ: std::cerr << "SUB_EQ\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3502 case MUL_EQ: std::cerr << "MUL_EQ\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3503 case DIV_EQ: std::cerr << "DIV_EQ\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3504 case LEFTDIV_EQ: std::cerr << "LEFTDIV_EQ\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3505 case POW_EQ: std::cerr << "POW_EQ\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3506 case EMUL_EQ: std::cerr << "EMUL_EQ\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3507 case EDIV_EQ: std::cerr << "EDIV_EQ\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3508 case ELEFTDIV_EQ: std::cerr << "ELEFTDIV_EQ\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3509 case EPOW_EQ: std::cerr << "EPOW_EQ\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3510 case AND_EQ: std::cerr << "AND_EQ\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3511 case OR_EQ: std::cerr << "OR_EQ\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3512 case LSHIFT_EQ: std::cerr << "LSHIFT_EQ\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3513 case RSHIFT_EQ: std::cerr << "RSHIFT_EQ\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3514 case LSHIFT: std::cerr << "LSHIFT\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3515 case RSHIFT: std::cerr << "RSHIFT\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3516 case EXPR_AND_AND: std::cerr << "EXPR_AND_AND\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3517 case EXPR_OR_OR: std::cerr << "EXPR_OR_OR\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3518 case EXPR_AND: std::cerr << "EXPR_AND\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3519 case EXPR_OR: std::cerr << "EXPR_OR\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3520 case EXPR_NOT: std::cerr << "EXPR_NOT\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3521 case EXPR_LT: std::cerr << "EXPR_LT\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3522 case EXPR_LE: std::cerr << "EXPR_LE\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3523 case EXPR_EQ: std::cerr << "EXPR_EQ\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3524 case EXPR_NE: std::cerr << "EXPR_NE\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3525 case EXPR_GE: std::cerr << "EXPR_GE\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3526 case EXPR_GT: std::cerr << "EXPR_GT\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3527 case LEFTDIV: std::cerr << "LEFTDIV\n"; break; |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
3528 case EMUL: std::cerr << "EMUL\n"; break; |
|
c3bb0b7a4261
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3529 case EDIV: std::cerr << "EDIV\n"; break; |
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3530 case ELEFTDIV: std::cerr << "ELEFTDIV\n"; break; |
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3531 case EPLUS: std::cerr << "EPLUS\n"; break; |
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3532 case EMINUS: std::cerr << "EMINUS\n"; break; |
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3533 case QUOTE: std::cerr << "QUOTE\n"; break; |
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3534 case TRANSPOSE: std::cerr << "TRANSPOSE\n"; break; |
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3535 case PLUS_PLUS: std::cerr << "PLUS_PLUS\n"; break; |
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3536 case MINUS_MINUS: std::cerr << "MINUS_MINUS\n"; break; |
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3537 case POW: std::cerr << "POW\n"; break; |
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3538 case EPOW: std::cerr << "EPOW\n"; break; |
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3539 case NUM: std::cerr << "NUM\n"; break; |
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3540 case IMAG_NUM: std::cerr << "IMAG_NUM\n"; break; |
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3541 case STRUCT_ELT: std::cerr << "STRUCT_ELT\n"; break; |
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3542 case NAME: std::cerr << "NAME\n"; break; |
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3543 case END: std::cerr << "END\n"; break; |
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3544 case DQ_STRING: std::cerr << "DQ_STRING\n"; break; |
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3545 case SQ_STRING: std::cerr << "SQ_STRING\n"; break; |
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3546 case FOR: std::cerr << "FOR\n"; break; |
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3547 case WHILE: std::cerr << "WHILE\n"; break; |
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3548 case DO: std::cerr << "DO\n"; break; |
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3549 case UNTIL: std::cerr << "UNTIL\n"; break; |
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3550 case IF: std::cerr << "IF\n"; break; |
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3551 case ELSEIF: std::cerr << "ELSEIF\n"; break; |
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3552 case ELSE: std::cerr << "ELSE\n"; break; |
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3553 case SWITCH: std::cerr << "SWITCH\n"; break; |
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3554 case CASE: std::cerr << "CASE\n"; break; |
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3555 case OTHERWISE: std::cerr << "OTHERWISE\n"; break; |
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3556 case BREAK: std::cerr << "BREAK\n"; break; |
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3557 case CONTINUE: std::cerr << "CONTINUE\n"; break; |
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3558 case FUNC_RET: std::cerr << "FUNC_RET\n"; break; |
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3559 case UNWIND: std::cerr << "UNWIND\n"; break; |
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3560 case CLEANUP: std::cerr << "CLEANUP\n"; break; |
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3561 case TRY: std::cerr << "TRY\n"; break; |
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3562 case CATCH: std::cerr << "CATCH\n"; break; |
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3563 case GLOBAL: std::cerr << "GLOBAL\n"; break; |
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3564 case STATIC: std::cerr << "STATIC\n"; break; |
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3565 case FCN_HANDLE: std::cerr << "FCN_HANDLE\n"; break; |
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3566 case END_OF_INPUT: std::cerr << "END_OF_INPUT\n\n"; break; |
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3567 case LEXICAL_ERROR: std::cerr << "LEXICAL_ERROR\n\n"; break; |
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3568 case FCN: std::cerr << "FCN\n"; break; |
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3569 case CLOSE_BRACE: std::cerr << "CLOSE_BRACE\n"; break; |
|
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3570 case SCRIPT_FILE: std::cerr << "SCRIPT_FILE\n"; break; |
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3571 case FUNCTION_FILE: std::cerr << "FUNCTION_FILE\n"; break; |
| 9476 | 3572 case SUPERCLASSREF: std::cerr << "SUPERCLASSREF\n"; break; |
| 3573 case METAQUERY: std::cerr << "METAQUERY\n"; break; | |
| 3574 case GET: std::cerr << "GET\n"; break; | |
| 3575 case SET: std::cerr << "SET\n"; break; | |
| 3576 case PROPERTIES: std::cerr << "PROPERTIES\n"; break; | |
| 3577 case METHODS: std::cerr << "METHODS\n"; break; | |
| 3578 case EVENTS: std::cerr << "EVENTS\n"; break; | |
| 3579 case CLASSDEF: std::cerr << "CLASSDEF\n"; break; | |
|
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3580 case '\n': std::cerr << "\\n\n"; break; |
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3581 case '\r': std::cerr << "\\r\n"; break; |
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3582 case '\t': std::cerr << "TAB\n"; break; |
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3583 default: |
|
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3584 { |
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3585 if (tok < 256) |
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3586 std::cerr << static_cast<char> (tok) << "\n"; |
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3587 else |
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3588 std::cerr << "UNKNOWN(" << tok << ")\n"; |
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3589 } |
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3590 break; |
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3591 } |
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3592 } |
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3593 |
| 8535 | 3594 static void |
| 3595 display_state (void) | |
| 3596 { | |
| 3597 std::cerr << "S: "; | |
| 3598 | |
| 3599 switch (YY_START) | |
| 3600 { | |
| 3601 case INITIAL: | |
| 3602 std::cerr << "INITIAL" << std::endl; | |
| 3603 break; | |
| 3604 | |
| 3605 case COMMAND_START: | |
| 3606 std::cerr << "COMMAND_START" << std::endl; | |
| 3607 break; | |
| 3608 | |
| 3609 case MATRIX_START: | |
| 3610 std::cerr << "MATRIX_START" << std::endl; | |
| 3611 break; | |
| 3612 | |
| 3613 case SCRIPT_FILE_BEGIN: | |
| 3614 std::cerr << "SCRIPT_FILE_BEGIN" << std::endl; | |
| 3615 break; | |
| 3616 | |
|
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|
3617 case FUNCTION_FILE_BEGIN: |
|
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|
3618 std::cerr << "FUNCTION_FILE_BEGIN" << std::endl; |
| 8535 | 3619 break; |
| 3620 | |
| 3621 default: | |
| 3622 std::cerr << "UNKNOWN START STATE!" << std::endl; | |
| 3623 break; | |
| 3624 } | |
| 3625 } | |
| 3626 | |
| 3627 static void | |
| 3628 lexer_debug (const char *pattern, const char *text) | |
| 3629 { | |
| 3630 std::cerr << std::endl; | |
| 3631 | |
| 3632 display_state (); | |
| 3633 | |
| 3634 std::cerr << "P: " << pattern << std::endl; | |
| 3635 std::cerr << "T: " << text << std::endl; | |
| 3636 } | |
| 3637 | |
|
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3638 DEFUN (__display_tokens__, args, nargout, |
|
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3639 "-*- texinfo -*-\n\ |
|
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3640 @deftypefn {Built-in Function} {} __display_tokens__ ()\n\ |
|
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3641 Query or set the internal variable that determines whether Octave's\n\ |
|
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3642 lexer displays tokens as they are read.\n\ |
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3643 @end deftypefn") |
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3644 { |
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3645 return SET_INTERNAL_VARIABLE (display_tokens); |
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3646 } |
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3647 |
| 4910 | 3648 DEFUN (__token_count__, , , |
| 3649 "-*- texinfo -*-\n\ | |
|
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3650 @deftypefn {Built-in Function} {} __token_count__ ()\n\ |
| 4910 | 3651 Number of language tokens processed since Octave startup.\n\ |
| 3652 @end deftypefn") | |
| 3653 { | |
| 3654 return octave_value (Vtoken_count); | |
| 3655 } | |
| 3656 | |
| 8535 | 3657 DEFUN (__lexer_debug_flag__, args, nargout, |
|
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3658 "-*- texinfo -*-\n\ |
|
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3659 @deftypefn {Built-in Function} {@var{old_val} =} __lexer_debug_flag__ (@var{new_val}))\n\ |
|
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3660 Undocumented internal function.\n\ |
|
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3661 @end deftypefn") |
| 8535 | 3662 { |
| 3663 octave_value retval; | |
| 3664 | |
| 3665 retval = set_internal_variable (lexer_debug_flag, args, nargout, | |
| 3666 "__lexer_debug_flag__"); | |
| 3667 | |
| 3668 return retval; | |
| 3669 } | |
| 3670 | |
| 1994 | 3671 /* |
| 3672 ;;; Local Variables: *** | |
| 3673 ;;; mode: C++ *** | |
| 3674 ;;; End: *** | |
| 3675 */ |