Mercurial > octave-nkf
annotate src/lex.l @ 7722:c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Fri, 18 Apr 2008 13:29:50 -0400 |
| parents | 4e2eafef689c |
| children | 74f5e0c7de9e |
| rev | line source |
|---|---|
| 1994 | 1 /* |
| 1 | 2 |
| 7017 | 3 Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
| 4 2002, 2003, 2004, 2005, 2006, 2007 John W. Eaton | |
| 1 | 5 |
| 6 This file is part of Octave. | |
| 7 | |
| 8 Octave is free software; you can redistribute it and/or modify it | |
| 9 under the terms of the GNU General Public License as published by the | |
| 7016 | 10 Free Software Foundation; either version 3 of the License, or (at your |
| 11 option) any later version. | |
| 1 | 12 |
| 13 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
| 7016 | 19 along with Octave; see the file COPYING. If not, see |
| 20 <http://www.gnu.org/licenses/>. | |
| 1 | 21 |
| 22 */ | |
| 23 | |
| 4753 | 24 %option prefix = "octave_" |
| 25 | |
| 4208 | 26 %s COMMAND_START |
| 27 %s MATRIX_START | |
| 4240 | 28 |
|
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29 %x SCRIPT_FILE_BEGIN |
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30 |
| 4240 | 31 %x NESTED_FUNCTION_END |
| 32 %x NESTED_FUNCTION_BEGIN | |
| 1 | 33 |
| 34 %{ | |
| 240 | 35 #ifdef HAVE_CONFIG_H |
| 1220 | 36 #include <config.h> |
| 240 | 37 #endif |
| 38 | |
| 1341 | 39 #include <cctype> |
| 40 #include <cstring> | |
| 41 | |
| 5765 | 42 #include <sstream> |
| 1823 | 43 #include <string> |
| 4214 | 44 #include <stack> |
| 1823 | 45 |
| 4093 | 46 #ifdef HAVE_UNISTD_H |
| 47 #ifdef HAVE_SYS_TYPES_H | |
| 48 #include <sys/types.h> | |
| 49 #endif | |
| 50 #include <unistd.h> | |
| 51 #endif | |
| 52 | |
| 2926 | 53 #include "cmd-edit.h" |
| 4153 | 54 #include "quit.h" |
| 4910 | 55 #include "lo-mappers.h" |
| 2926 | 56 |
| 1497 | 57 // These would be alphabetical, but y.tab.h must be included before |
| 58 // oct-gperf.h and y.tab.h must be included after token.h and the tree | |
| 59 // class declarations. We can't include y.tab.h in oct-gperf.h | |
| 60 // because it may not be protected to allow it to be included multiple | |
| 61 // times. | |
| 62 | |
| 4264 | 63 #include "Cell.h" |
| 3665 | 64 #include "comment-list.h" |
| 2181 | 65 #include "defun.h" |
| 1355 | 66 #include "error.h" |
| 4910 | 67 #include "gripes.h" |
| 1351 | 68 #include "input.h" |
| 1355 | 69 #include "lex.h" |
| 2891 | 70 #include "ov.h" |
| 1355 | 71 #include "parse.h" |
| 2987 | 72 #include "pt-all.h" |
| 2891 | 73 #include "symtab.h" |
| 74 #include "token.h" | |
| 75 #include "toplev.h" | |
| 1355 | 76 #include "utils.h" |
| 77 #include "variables.h" | |
| 2492 | 78 #include <y.tab.h> |
| 79 #include <oct-gperf.h> | |
| 1 | 80 |
| 2716 | 81 #if ! (defined (FLEX_SCANNER) \ |
| 82 && defined (YY_FLEX_MAJOR_VERSION) && YY_FLEX_MAJOR_VERSION >= 2 \ | |
| 83 && defined (YY_FLEX_MINOR_VERSION) && YY_FLEX_MINOR_VERSION >= 5) | |
| 84 #error lex.l requires flex version 2.5.4 or later | |
| 85 #endif | |
| 86 | |
| 4753 | 87 #define yylval octave_lval |
| 88 | |
| 89 // Arrange to get input via readline. | |
| 90 | |
| 91 #ifdef YY_INPUT | |
| 92 #undef YY_INPUT | |
| 93 #endif | |
| 94 #define YY_INPUT(buf, result, max_size) \ | |
| 95 if ((result = octave_read (buf, max_size)) < 0) \ | |
| 96 YY_FATAL_ERROR ("octave_read () in flex scanner failed"); | |
| 97 | |
| 98 // Try to avoid crashing out completely on fatal scanner errors. | |
| 99 // The call to yy_fatal_error should never happen, but it avoids a | |
| 100 // `static function defined but not used' warning from gcc. | |
| 101 | |
| 102 #ifdef YY_FATAL_ERROR | |
| 103 #undef YY_FATAL_ERROR | |
| 104 #endif | |
| 105 #define YY_FATAL_ERROR(msg) \ | |
| 106 do \ | |
| 107 { \ | |
| 108 error (msg); \ | |
| 109 OCTAVE_QUIT; \ | |
| 110 yy_fatal_error (msg); \ | |
| 111 } \ | |
| 112 while (0) | |
| 113 | |
|
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114 #define DISPLAY_TOK_AND_RETURN(tok) \ |
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115 do \ |
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116 { \ |
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117 int tok_val = tok; \ |
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118 if (Vdisplay_tokens) \ |
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119 display_token (tok_val); \ |
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120 return tok_val; \ |
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121 } \ |
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122 while (0) |
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123 |
| 4910 | 124 #define COUNT_TOK_AND_RETURN(tok) \ |
| 125 do \ | |
| 126 { \ | |
| 127 Vtoken_count++; \ | |
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128 DISPLAY_TOK_AND_RETURN (tok); \ |
| 4910 | 129 } \ |
| 130 while (0) | |
| 131 | |
| 4753 | 132 #define TOK_RETURN(tok) \ |
| 133 do \ | |
| 134 { \ | |
| 135 current_input_column += yyleng; \ | |
| 136 lexer_flags.quote_is_transpose = false; \ | |
| 137 lexer_flags.convert_spaces_to_comma = true; \ | |
| 4910 | 138 COUNT_TOK_AND_RETURN (tok); \ |
| 4753 | 139 } \ |
| 140 while (0) | |
| 141 | |
| 142 #define TOK_PUSH_AND_RETURN(name, tok) \ | |
| 143 do \ | |
| 144 { \ | |
| 145 yylval.tok_val = new token (name, input_line_number, \ | |
| 146 current_input_column); \ | |
| 147 token_stack.push (yylval.tok_val); \ | |
| 148 TOK_RETURN (tok); \ | |
| 149 } \ | |
| 150 while (0) | |
| 151 | |
| 152 #define BIN_OP_RETURN(tok, convert) \ | |
| 153 do \ | |
| 154 { \ | |
| 155 yylval.tok_val = new token (input_line_number, current_input_column); \ | |
| 156 token_stack.push (yylval.tok_val); \ | |
| 157 current_input_column += yyleng; \ | |
| 158 lexer_flags.quote_is_transpose = false; \ | |
| 159 lexer_flags.convert_spaces_to_comma = convert; \ | |
| 4910 | 160 COUNT_TOK_AND_RETURN (tok); \ |
| 4753 | 161 } \ |
| 162 while (0) | |
| 163 | |
| 164 #define XBIN_OP_RETURN(tok, convert) \ | |
| 165 do \ | |
| 166 { \ | |
| 167 gripe_matlab_incompatible_operator (yytext); \ | |
| 168 BIN_OP_RETURN (tok, convert); \ | |
| 169 } \ | |
| 170 while (0) | |
| 171 | |
| 3883 | 172 // TRUE means that we have encountered EOF on the input stream. |
| 173 bool parser_end_of_input = false; | |
| 174 | |
| 1826 | 175 // Flags that need to be shared between the lexer and parser. |
| 176 lexical_feedback lexer_flags; | |
| 177 | |
| 1351 | 178 // Stack to hold tokens so that we can delete them when the parser is |
| 179 // reset and avoid growing forever just because we are stashing some | |
| 180 // information. This has to appear before lex.h is included, because | |
| 181 // one of the macros defined there uses token_stack. | |
| 2614 | 182 // |
| 5775 | 183 // FIXME -- this should really be static, but that causes |
| 2614 | 184 // problems on some systems. |
| 4214 | 185 std::stack <token*> token_stack; |
| 1351 | 186 |
| 1826 | 187 // Did eat_whitespace() eat a space or tab, or a newline, or both? |
| 1 | 188 |
| 1826 | 189 typedef int yum_yum; |
| 1 | 190 |
| 1826 | 191 const yum_yum ATE_NOTHING = 0; |
| 192 const yum_yum ATE_SPACE_OR_TAB = 1; | |
| 193 const yum_yum ATE_NEWLINE = 2; | |
| 1088 | 194 |
| 3351 | 195 // Is the closest nesting level a square bracket, squiggly brace or a paren? |
| 1826 | 196 |
| 4214 | 197 class bracket_brace_paren_nesting_level |
| 1826 | 198 { |
| 199 public: | |
| 200 | |
| 4214 | 201 bracket_brace_paren_nesting_level (void) : context () { } |
| 1826 | 202 |
| 3351 | 203 ~bracket_brace_paren_nesting_level (void) { } |
| 204 | |
| 4214 | 205 void bracket (void) { context.push (BRACKET); } |
| 206 bool is_bracket (void) | |
| 207 { return ! context.empty () && context.top () == BRACKET; } | |
| 208 | |
| 209 void brace (void) { context.push (BRACE); } | |
| 210 bool is_brace (void) | |
| 211 { return ! context.empty () && context.top () == BRACE; } | |
| 212 | |
| 213 void paren (void) { context.push (PAREN); } | |
| 214 bool is_paren (void) | |
| 215 { return ! context.empty () && context.top () == PAREN; } | |
| 216 | |
| 4608 | 217 bool is_bracket_or_brace (void) |
| 218 { return (! context.empty () | |
| 219 && (context.top () == BRACKET || context.top () == BRACE)); } | |
| 220 | |
| 4214 | 221 bool none (void) { return context.empty (); } |
| 222 | |
| 223 void remove (void) { if (! context.empty ()) context.pop (); } | |
| 224 | |
| 225 void clear (void) { while (! context.empty ()) context.pop (); } | |
| 1826 | 226 |
| 227 private: | |
| 228 | |
| 4214 | 229 std::stack<int> context; |
| 230 | |
| 5225 | 231 static const int BRACKET; |
| 232 static const int BRACE; | |
| 233 static const int PAREN; | |
| 1826 | 234 |
| 3351 | 235 bracket_brace_paren_nesting_level (const bracket_brace_paren_nesting_level&); |
| 1826 | 236 |
| 3351 | 237 bracket_brace_paren_nesting_level& |
| 238 operator = (const bracket_brace_paren_nesting_level&); | |
| 1826 | 239 }; |
| 240 | |
| 5225 | 241 const int bracket_brace_paren_nesting_level::BRACKET = 1; |
| 242 const int bracket_brace_paren_nesting_level::BRACE = 2; | |
| 243 const int bracket_brace_paren_nesting_level::PAREN = 3; | |
| 244 | |
| 3351 | 245 static bracket_brace_paren_nesting_level nesting_level; |
| 1 | 246 |
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247 static bool Vdisplay_tokens = false; |
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248 |
| 4910 | 249 static unsigned int Vtoken_count = 0; |
| 250 | |
| 146 | 251 // Forward declarations for functions defined at the bottom of this |
| 252 // file. | |
| 253 | |
| 1 | 254 static void fixup_column_count (char *s); |
| 146 | 255 static void do_comma_insert_check (void); |
| 4867 | 256 static int is_keyword_token (const std::string& s); |
| 4238 | 257 static void prep_for_function (void); |
| 258 static void prep_for_nested_function (void); | |
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259 static int process_comment (bool& eof); |
| 2857 | 260 static bool match_any (char c, const char *s); |
| 3263 | 261 static bool next_token_is_sep_op (void); |
| 3246 | 262 static bool next_token_is_bin_op (bool spc_prev); |
| 263 static bool next_token_is_postfix_unary_op (bool spc_prev); | |
| 3523 | 264 static std::string strip_trailing_whitespace (char *s); |
| 3246 | 265 static void handle_number (void); |
| 975 | 266 static int handle_string (char delim, int text_style = 0); |
| 4612 | 267 static int handle_close_bracket (bool spc_gobbled, int bracket_type); |
| 3974 | 268 static int handle_identifier (void); |
| 3096 | 269 static bool have_continuation (bool trailing_comments_ok = true); |
| 270 static bool have_ellipsis_continuation (bool trailing_comments_ok = true); | |
| 3665 | 271 static void scan_for_comments (const char *); |
| 1826 | 272 static yum_yum eat_whitespace (void); |
| 273 static yum_yum eat_continuation (void); | |
| 3388 | 274 static void maybe_warn_separator_insert (char sep); |
| 3400 | 275 static void gripe_single_quote_string (void); |
| 4037 | 276 static void gripe_matlab_incompatible (const std::string& msg); |
| 277 static void maybe_gripe_matlab_incompatible_comment (char c); | |
| 278 static void gripe_matlab_incompatible_continuation (void); | |
| 279 static void gripe_matlab_incompatible_operator (const std::string& op); | |
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280 static void display_token (int tok); |
| 1 | 281 |
| 282 %} | |
| 283 | |
| 284 D [0-9] | |
| 285 S [ \t] | |
| 5570 | 286 NL ((\n)|(\r)|(\r\n)) |
| 2042 | 287 SNL ({S}|{NL}) |
| 1 | 288 EL (\.\.\.) |
| 967 | 289 BS (\\) |
| 290 CONT ({EL}|{BS}) | |
| 1 | 291 Im [iIjJ] |
| 967 | 292 CCHAR [#%] |
| 293 COMMENT ({CCHAR}.*{NL}) | |
| 294 SNLCMT ({SNL}|{COMMENT}) | |
| 295 NOT ((\~)|(\!)) | |
| 4037 | 296 POW ((\*\*)|(\^)) |
| 297 EPOW (\.{POW}) | |
| 5290 | 298 IDENT ([_$a-zA-Z][_$a-zA-Z0-9]*) |
| 1 | 299 EXPON ([DdEe][+-]?{D}+) |
| 3220 | 300 NUMBER (({D}+\.?{D}*{EXPON}?)|(\.{D}+{EXPON}?)|(0[xX][0-9a-fA-F]+)) |
| 1 | 301 %% |
| 302 | |
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303 <SCRIPT_FILE_BEGIN>. { |
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304 BEGIN (INITIAL); |
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305 yyunput (yytext[0], yytext); |
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306 COUNT_TOK_AND_RETURN (SCRIPT); |
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307 } |
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308 |
| 4240 | 309 <NESTED_FUNCTION_END>. { |
| 4323 | 310 BEGIN (NESTED_FUNCTION_BEGIN); |
| 4410 | 311 yyunput (yytext[0], yytext); |
| 4910 | 312 COUNT_TOK_AND_RETURN (';'); |
| 4240 | 313 } |
| 314 | |
| 315 <NESTED_FUNCTION_BEGIN>. { | |
| 4323 | 316 BEGIN (INITIAL); |
| 4410 | 317 yyunput (yytext[0], yytext); |
| 4238 | 318 prep_for_nested_function (); |
| 4910 | 319 COUNT_TOK_AND_RETURN (FCN); |
| 4238 | 320 } |
| 321 | |
| 968 | 322 %{ |
| 4208 | 323 // Help and other command-style functions are a pain in the ass. This |
| 968 | 324 // stuff needs to be simplified. May require some changes in the |
| 325 // parser too. | |
| 326 %} | |
| 327 | |
| 4208 | 328 <COMMAND_START>{NL} { |
| 4323 | 329 BEGIN (INITIAL); |
| 967 | 330 current_input_column = 1; |
| 2857 | 331 lexer_flags.quote_is_transpose = false; |
| 332 lexer_flags.convert_spaces_to_comma = true; | |
| 5212 | 333 lexer_flags.doing_rawcommand = false; |
| 4910 | 334 COUNT_TOK_AND_RETURN ('\n'); |
| 967 | 335 } |
| 1 | 336 |
| 4208 | 337 <COMMAND_START>[\;\,] { |
| 5102 | 338 if (lexer_flags.doing_rawcommand) |
| 5279 | 339 TOK_PUSH_AND_RETURN (yytext, SQ_STRING); |
| 5102 | 340 |
| 341 BEGIN (INITIAL); | |
| 342 | |
| 343 if (strcmp (yytext, ",") == 0) | |
| 344 TOK_RETURN (','); | |
| 967 | 345 else |
| 5102 | 346 TOK_RETURN (';'); |
| 967 | 347 } |
| 1 | 348 |
| 4208 | 349 <COMMAND_START>[\"\'] { |
| 975 | 350 current_input_column++; |
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351 int tok = handle_string (yytext[0], true); |
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352 COUNT_TOK_AND_RETURN (tok); |
| 975 | 353 } |
| 354 | |
| 4923 | 355 <COMMAND_START>[^#% \t\r\n\;\,\"\'][^ \t\r\n\;\,]*{S}* { |
| 3523 | 356 std::string tok = strip_trailing_whitespace (yytext); |
| 5279 | 357 TOK_PUSH_AND_RETURN (tok, SQ_STRING); |
| 967 | 358 } |
| 1 | 359 |
| 968 | 360 %{ |
| 1 | 361 // For this and the next two rules, we're looking at ']', and we |
| 971 | 362 // need to know if the next token is `=' or `=='. |
| 1 | 363 // |
| 364 // It would have been so much easier if the delimiters were simply | |
| 365 // different for the expression on the left hand side of the equals | |
| 366 // operator. | |
| 971 | 367 // |
| 368 // It's also a pain in the ass to decide whether to insert a comma | |
| 369 // after seeing a ']' character... | |
| 968 | 370 %} |
| 371 | |
| 4208 | 372 <MATRIX_START>{SNLCMT}*\]{S}* { |
| 3665 | 373 scan_for_comments (yytext); |
| 1001 | 374 fixup_column_count (yytext); |
| 375 int c = yytext[yyleng-1]; | |
| 376 int cont_is_spc = eat_continuation (); | |
| 4608 | 377 bool spc_gobbled = (cont_is_spc || c == ' ' || c == '\t'); |
| 5345 | 378 int tok_to_return = handle_close_bracket (spc_gobbled, ']'); |
| 379 if (spc_gobbled) | |
| 380 yyunput (' ', yytext); | |
| 381 COUNT_TOK_AND_RETURN (tok_to_return); | |
| 4608 | 382 } |
| 383 | |
| 384 <MATRIX_START>{SNLCMT}*\}{S}* { | |
| 385 scan_for_comments (yytext); | |
| 386 fixup_column_count (yytext); | |
| 387 int c = yytext[yyleng-1]; | |
| 388 int cont_is_spc = eat_continuation (); | |
| 389 bool spc_gobbled = (cont_is_spc || c == ' ' || c == '\t'); | |
| 5345 | 390 int tok_to_return = handle_close_bracket (spc_gobbled, '}'); |
| 391 if (spc_gobbled) | |
| 392 yyunput (' ', yytext); | |
| 393 COUNT_TOK_AND_RETURN (tok_to_return); | |
| 967 | 394 } |
| 1 | 395 |
| 968 | 396 %{ |
| 1088 | 397 // Commas are element separators in matrix constants. If we don't |
| 398 // check for continuations here we can end up inserting too many | |
| 399 // commas. | |
| 968 | 400 %} |
| 401 | |
| 4208 | 402 <MATRIX_START>{S}*\,{S}* { |
| 1088 | 403 current_input_column += yyleng; |
| 3388 | 404 |
| 1088 | 405 int tmp = eat_continuation (); |
| 3388 | 406 |
| 2857 | 407 lexer_flags.quote_is_transpose = false; |
| 408 lexer_flags.convert_spaces_to_comma = true; | |
| 3388 | 409 |
| 410 if ((tmp & ATE_NEWLINE) == ATE_NEWLINE) | |
| 411 { | |
| 412 maybe_warn_separator_insert (';'); | |
| 413 | |
| 4476 | 414 yyunput (';', yytext); |
| 3388 | 415 } |
| 416 | |
| 4910 | 417 COUNT_TOK_AND_RETURN (','); |
| 967 | 418 } |
| 1 | 419 |
| 968 | 420 %{ |
| 421 // In some cases, spaces in matrix constants can turn into commas. | |
| 422 // If commas are required, spaces are not important in matrix | |
| 1088 | 423 // constants so we just eat them. If we don't check for continuations |
| 424 // here we can end up inserting too many commas. | |
| 968 | 425 %} |
| 430 | 426 |
| 4208 | 427 <MATRIX_START>{S}+ { |
| 1088 | 428 current_input_column += yyleng; |
| 3388 | 429 |
| 430 int tmp = eat_continuation (); | |
| 431 int bin_op = next_token_is_bin_op (true); | |
| 432 int postfix_un_op = next_token_is_postfix_unary_op (true); | |
| 433 | |
| 434 if (! (postfix_un_op || bin_op) | |
| 4608 | 435 && nesting_level.is_bracket_or_brace () |
| 3388 | 436 && lexer_flags.convert_spaces_to_comma) |
| 967 | 437 { |
| 3388 | 438 if ((tmp & ATE_NEWLINE) == ATE_NEWLINE) |
| 439 { | |
| 440 maybe_warn_separator_insert (';'); | |
| 967 | 441 |
| 4476 | 442 yyunput (';', yytext); |
| 3388 | 443 } |
| 444 | |
| 4476 | 445 lexer_flags.quote_is_transpose = false; |
| 446 lexer_flags.convert_spaces_to_comma = true; | |
| 447 | |
| 448 maybe_warn_separator_insert (','); | |
| 449 | |
| 4910 | 450 COUNT_TOK_AND_RETURN (','); |
| 967 | 451 } |
| 452 } | |
| 430 | 453 |
| 968 | 454 %{ |
| 1088 | 455 // Semicolons are handled as row seprators in matrix constants. If we |
| 456 // don't eat whitespace here we can end up inserting too many | |
| 457 // semicolons. | |
| 968 | 458 %} |
| 459 | |
| 4208 | 460 <MATRIX_START>{SNLCMT}*;{SNLCMT}* { |
| 3665 | 461 scan_for_comments (yytext); |
| 967 | 462 fixup_column_count (yytext); |
| 1001 | 463 eat_whitespace (); |
| 2857 | 464 lexer_flags.quote_is_transpose = false; |
| 465 lexer_flags.convert_spaces_to_comma = true; | |
| 4910 | 466 COUNT_TOK_AND_RETURN (';'); |
| 967 | 467 } |
| 468 | |
| 968 | 469 %{ |
| 1088 | 470 // In some cases, new lines can also become row separators. If we |
| 471 // don't eat whitespace here we can end up inserting too many | |
| 472 // semicolons. | |
| 985 | 473 %} |
| 474 | |
| 4208 | 475 <MATRIX_START>{S}*{COMMENT}{SNLCMT}* | |
| 476 <MATRIX_START>{S}*{NL}{SNLCMT}* { | |
| 3665 | 477 scan_for_comments (yytext); |
| 1082 | 478 fixup_column_count (yytext); |
| 1088 | 479 eat_whitespace (); |
| 3388 | 480 |
| 4476 | 481 lexer_flags.quote_is_transpose = false; |
| 482 lexer_flags.convert_spaces_to_comma = true; | |
| 483 | |
| 484 if (nesting_level.none ()) | |
| 485 return LEXICAL_ERROR; | |
| 985 | 486 |
| 4608 | 487 if (nesting_level.is_bracket_or_brace ()) |
| 3388 | 488 { |
| 489 maybe_warn_separator_insert (';'); | |
| 490 | |
| 4910 | 491 COUNT_TOK_AND_RETURN (';'); |
| 985 | 492 } |
| 493 } | |
| 494 | |
| 967 | 495 \[{S}* { |
| 3351 | 496 nesting_level.bracket (); |
| 975 | 497 |
| 1082 | 498 current_input_column += yyleng; |
| 2857 | 499 lexer_flags.quote_is_transpose = false; |
| 500 lexer_flags.convert_spaces_to_comma = true; | |
| 975 | 501 |
| 5615 | 502 if (lexer_flags.defining_func && ! lexer_flags.parsed_function_name) |
| 503 lexer_flags.looking_at_return_list = true; | |
| 504 else | |
| 505 lexer_flags.looking_at_matrix_or_assign_lhs = true; | |
| 506 | |
| 975 | 507 promptflag--; |
| 508 eat_whitespace (); | |
| 509 | |
| 5102 | 510 lexer_flags.bracketflag++; |
| 511 BEGIN (MATRIX_START); | |
| 512 COUNT_TOK_AND_RETURN ('['); | |
| 967 | 513 } |
| 1 | 514 |
| 968 | 515 \] { |
| 1826 | 516 nesting_level.remove (); |
| 968 | 517 |
| 5102 | 518 TOK_RETURN (']'); |
| 968 | 519 } |
| 520 | |
| 521 %{ | |
| 522 // Imaginary numbers. | |
| 523 %} | |
| 524 | |
| 525 {NUMBER}{Im} { | |
| 3246 | 526 handle_number (); |
| 4910 | 527 COUNT_TOK_AND_RETURN (IMAG_NUM); |
| 968 | 528 } |
| 529 | |
| 530 %{ | |
| 531 // Real numbers. Don't grab the `.' part of a dot operator as part of | |
| 532 // the constant. | |
| 533 %} | |
| 534 | |
| 535 {D}+/\.[\*/\\^'] | | |
| 536 {NUMBER} { | |
| 3246 | 537 handle_number (); |
| 4910 | 538 COUNT_TOK_AND_RETURN (NUM); |
| 968 | 539 } |
| 540 | |
| 541 %{ | |
| 542 // Eat whitespace. Whitespace inside matrix constants is handled by | |
| 4208 | 543 // the <MATRIX_START> start state code above. |
| 968 | 544 %} |
| 545 | |
| 967 | 546 {S}* { |
| 547 current_input_column += yyleng; | |
| 548 } | |
| 549 | |
| 968 | 550 %{ |
| 551 // Continuation lines. Allow comments after continuations. | |
| 552 %} | |
| 553 | |
| 967 | 554 {CONT}{S}*{NL} | |
| 555 {CONT}{S}*{COMMENT} { | |
| 4037 | 556 if (yytext[0] == '\\') |
| 557 gripe_matlab_incompatible_continuation (); | |
| 3665 | 558 scan_for_comments (yytext); |
| 967 | 559 promptflag--; |
| 560 current_input_column = 1; | |
| 561 } | |
| 1 | 562 |
| 968 | 563 %{ |
| 564 // End of file. | |
| 565 %} | |
| 566 | |
| 967 | 567 <<EOF>> { |
| 568 TOK_RETURN (END_OF_INPUT); | |
| 569 } | |
| 1 | 570 |
| 968 | 571 %{ |
| 970 | 572 // Identifiers. Truncate the token at the first space or tab but |
| 573 // don't write directly on yytext. | |
| 968 | 574 %} |
| 575 | |
| 967 | 576 {IDENT}{S}* { |
| 4238 | 577 int id_tok = handle_identifier (); |
| 578 | |
| 579 if (id_tok >= 0) | |
| 4910 | 580 COUNT_TOK_AND_RETURN (id_tok); |
| 967 | 581 } |
| 1 | 582 |
| 968 | 583 %{ |
| 4342 | 584 // Function handles. |
| 585 %} | |
| 586 | |
| 4930 | 587 "@" { |
| 588 current_input_column++; | |
| 589 lexer_flags.quote_is_transpose = false; | |
| 590 lexer_flags.convert_spaces_to_comma = false; | |
| 591 lexer_flags.looking_at_function_handle++; | |
| 592 COUNT_TOK_AND_RETURN ('@'); | |
| 4342 | 593 } |
| 594 | |
| 595 %{ | |
| 968 | 596 // A new line character. New line characters inside matrix constants |
| 4208 | 597 // are handled by the <MATRIX_START> start state code above. If closest |
| 985 | 598 // nesting is inside parentheses, don't return a row separator. |
| 968 | 599 %} |
| 600 | |
| 967 | 601 {NL} { |
| 602 current_input_column = 1; | |
| 2857 | 603 lexer_flags.quote_is_transpose = false; |
| 604 lexer_flags.convert_spaces_to_comma = true; | |
| 1826 | 605 if (nesting_level.none ()) |
| 4910 | 606 COUNT_TOK_AND_RETURN ('\n'); |
| 4037 | 607 else if (nesting_level.is_paren ()) |
| 608 gripe_matlab_incompatible ("bare newline inside parentheses"); | |
| 4608 | 609 else if (nesting_level.is_bracket_or_brace ()) |
| 985 | 610 return LEXICAL_ERROR; |
| 967 | 611 } |
| 1 | 612 |
| 968 | 613 %{ |
| 614 // Single quote can either be the beginning of a string or a transpose | |
| 615 // operator. | |
| 616 %} | |
| 617 | |
| 967 | 618 "'" { |
| 619 current_input_column++; | |
| 2857 | 620 lexer_flags.convert_spaces_to_comma = true; |
| 1 | 621 |
| 1826 | 622 if (lexer_flags.quote_is_transpose) |
| 967 | 623 { |
| 624 do_comma_insert_check (); | |
| 4910 | 625 COUNT_TOK_AND_RETURN (QUOTE); |
| 967 | 626 } |
| 627 else | |
|
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628 { |
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629 int tok = handle_string ('\''); |
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630 COUNT_TOK_AND_RETURN (tok); |
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631 } |
| 967 | 632 } |
| 1 | 633 |
| 968 | 634 %{ |
| 971 | 635 // Double quotes always begin strings. |
| 636 %} | |
| 637 | |
| 973 | 638 \" { |
| 639 current_input_column++; | |
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640 int tok = handle_string ('"'); |
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641 COUNT_TOK_AND_RETURN (tok); |
| 973 | 642 } |
| 971 | 643 |
| 644 %{ | |
| 985 | 645 // Gobble comments. If closest nesting is inside parentheses, don't |
| 646 // return a new line. | |
| 647 %} | |
| 968 | 648 |
| 967 | 649 {CCHAR} { |
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650 bool eof = false; |
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651 yyunput (yytext[0], yytext); |
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652 int tok = process_comment (eof); |
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653 if (eof) |
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654 TOK_RETURN (END_OF_INPUT); |
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655 else if (tok > 0) |
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656 COUNT_TOK_AND_RETURN (tok); |
| 967 | 657 } |
| 440 | 658 |
| 968 | 659 %{ |
| 660 // Other operators. | |
| 661 %} | |
| 662 | |
| 5102 | 663 ":" { BIN_OP_RETURN (':', false); } |
| 664 | |
| 4037 | 665 ".+" { XBIN_OP_RETURN (EPLUS, false); } |
| 666 ".-" { XBIN_OP_RETURN (EMINUS, false); } | |
| 2857 | 667 ".*" { BIN_OP_RETURN (EMUL, false); } |
| 668 "./" { BIN_OP_RETURN (EDIV, false); } | |
| 669 ".\\" { BIN_OP_RETURN (ELEFTDIV, false); } | |
| 4037 | 670 ".^" { BIN_OP_RETURN (EPOW, false); } |
| 671 ".**" { XBIN_OP_RETURN (EPOW, false); } | |
| 2857 | 672 ".'" { do_comma_insert_check (); BIN_OP_RETURN (TRANSPOSE, true); } |
| 4037 | 673 "++" { do_comma_insert_check (); XBIN_OP_RETURN (PLUS_PLUS, true); } |
| 674 "--" { do_comma_insert_check (); XBIN_OP_RETURN (MINUS_MINUS, true); } | |
| 2857 | 675 "<=" { BIN_OP_RETURN (EXPR_LE, false); } |
| 676 "==" { BIN_OP_RETURN (EXPR_EQ, false); } | |
| 4037 | 677 "~=" { BIN_OP_RETURN (EXPR_NE, false); } |
| 678 "!=" { XBIN_OP_RETURN (EXPR_NE, false); } | |
| 2857 | 679 ">=" { BIN_OP_RETURN (EXPR_GE, false); } |
| 2877 | 680 "&" { BIN_OP_RETURN (EXPR_AND, false); } |
| 2857 | 681 "|" { BIN_OP_RETURN (EXPR_OR, false); } |
| 682 "<" { BIN_OP_RETURN (EXPR_LT, false); } | |
| 683 ">" { BIN_OP_RETURN (EXPR_GT, false); } | |
| 5102 | 684 "+" { BIN_OP_RETURN ('+', false); } |
| 685 "-" { BIN_OP_RETURN ('-', false); } | |
| 2857 | 686 "*" { BIN_OP_RETURN ('*', false); } |
| 687 "/" { BIN_OP_RETURN ('/', false); } | |
| 688 "\\" { BIN_OP_RETURN (LEFTDIV, false); } | |
| 689 ";" { BIN_OP_RETURN (';', true); } | |
| 690 "," { BIN_OP_RETURN (',', true); } | |
| 4037 | 691 "^" { BIN_OP_RETURN (POW, false); } |
| 692 "**" { XBIN_OP_RETURN (POW, false); } | |
| 2857 | 693 "=" { BIN_OP_RETURN ('=', true); } |
| 2877 | 694 "&&" { BIN_OP_RETURN (EXPR_AND_AND, false); } |
| 2857 | 695 "||" { BIN_OP_RETURN (EXPR_OR_OR, false); } |
| 4037 | 696 "<<" { XBIN_OP_RETURN (LSHIFT, false); } |
| 697 ">>" { XBIN_OP_RETURN (RSHIFT, false); } | |
| 967 | 698 |
| 699 {NOT} { | |
| 4037 | 700 if (yytext[0] == '~') |
| 701 BIN_OP_RETURN (EXPR_NOT, false); | |
| 702 else | |
| 703 XBIN_OP_RETURN (EXPR_NOT, false); | |
| 967 | 704 } |
| 1 | 705 |
| 967 | 706 "(" { |
| 4131 | 707 lexer_flags.looking_at_indirect_ref = false; |
| 1826 | 708 nesting_level.paren (); |
| 985 | 709 promptflag--; |
| 967 | 710 TOK_RETURN ('('); |
| 711 } | |
| 712 | |
| 713 ")" { | |
| 1826 | 714 nesting_level.remove (); |
| 967 | 715 current_input_column++; |
| 2857 | 716 lexer_flags.quote_is_transpose = true; |
| 4608 | 717 lexer_flags.convert_spaces_to_comma = nesting_level.is_bracket_or_brace (); |
| 1001 | 718 do_comma_insert_check (); |
| 4910 | 719 COUNT_TOK_AND_RETURN (')'); |
| 967 | 720 } |
| 721 | |
| 5102 | 722 "." { TOK_RETURN ('.'); } |
| 2066 | 723 |
| 4037 | 724 "+=" { XBIN_OP_RETURN (ADD_EQ, false); } |
| 725 "-=" { XBIN_OP_RETURN (SUB_EQ, false); } | |
| 726 "*=" { XBIN_OP_RETURN (MUL_EQ, false); } | |
| 727 "/=" { XBIN_OP_RETURN (DIV_EQ, false); } | |
| 728 "\\=" { XBIN_OP_RETURN (LEFTDIV_EQ, false); } | |
| 729 ".+=" { XBIN_OP_RETURN (ADD_EQ, false); } | |
| 730 ".-=" { XBIN_OP_RETURN (SUB_EQ, false); } | |
| 731 ".*=" { XBIN_OP_RETURN (EMUL_EQ, false); } | |
| 732 "./=" { XBIN_OP_RETURN (EDIV_EQ, false); } | |
| 733 ".\\=" { XBIN_OP_RETURN (ELEFTDIV_EQ, false); } | |
| 734 {POW}= { XBIN_OP_RETURN (POW_EQ, false); } | |
| 735 {EPOW}= { XBIN_OP_RETURN (EPOW_EQ, false); } | |
| 736 "&=" { XBIN_OP_RETURN (AND_EQ, false); } | |
| 737 "|=" { XBIN_OP_RETURN (OR_EQ, false); } | |
| 738 "<<=" { XBIN_OP_RETURN (LSHIFT_EQ, false); } | |
| 739 ">>=" { XBIN_OP_RETURN (RSHIFT_EQ, false); } | |
| 2877 | 740 |
| 4608 | 741 \{{S}* { |
| 3351 | 742 nesting_level.brace (); |
| 4608 | 743 |
| 744 current_input_column += yyleng; | |
| 745 lexer_flags.quote_is_transpose = false; | |
| 746 lexer_flags.convert_spaces_to_comma = true; | |
| 747 | |
| 3351 | 748 promptflag--; |
| 4608 | 749 eat_whitespace (); |
| 750 | |
| 4613 | 751 lexer_flags.braceflag++; |
| 4608 | 752 BEGIN (MATRIX_START); |
| 4910 | 753 COUNT_TOK_AND_RETURN ('{'); |
| 3351 | 754 } |
| 755 | |
| 756 "}" { | |
| 757 nesting_level.remove (); | |
| 758 | |
| 4608 | 759 TOK_RETURN ('}'); |
| 3351 | 760 } |
| 761 | |
| 968 | 762 %{ |
| 2066 | 763 // Unrecognized input is a lexical error. |
| 968 | 764 %} |
| 1 | 765 |
| 2042 | 766 . { |
| 4240 | 767 // EOF happens here if we are parsing nested functions. |
| 768 | |
| 4410 | 769 yyunput (yytext[0], yytext); |
| 4248 | 770 |
| 771 int c = yyinput (); | |
| 772 | |
| 773 if (c != EOF) | |
| 4240 | 774 { |
| 775 current_input_column++; | |
| 776 | |
| 777 error ("invalid character `%s' (ASCII %d) near line %d, column %d", | |
| 4248 | 778 undo_string_escape (static_cast<char> (c)), c, |
| 4240 | 779 input_line_number, current_input_column); |
| 780 | |
| 781 return LEXICAL_ERROR; | |
| 782 } | |
| 783 else | |
| 784 TOK_RETURN (END_OF_INPUT); | |
| 2066 | 785 } |
| 1 | 786 |
| 787 %% | |
| 788 | |
| 767 | 789 // GAG. |
| 790 // | |
| 791 // If we're reading a matrix and the next character is '[', make sure | |
| 792 // that we insert a comma ahead of it. | |
| 793 | |
| 146 | 794 void |
| 1 | 795 do_comma_insert_check (void) |
| 796 { | |
| 1001 | 797 int spc_gobbled = eat_continuation (); |
| 2970 | 798 |
| 1 | 799 int c = yyinput (); |
| 2970 | 800 |
| 4410 | 801 yyunput (c, yytext); |
| 2970 | 802 |
| 1001 | 803 if (spc_gobbled) |
| 4410 | 804 yyunput (' ', yytext); |
| 2970 | 805 |
| 3351 | 806 lexer_flags.do_comma_insert = (lexer_flags.bracketflag && c == '['); |
| 1 | 807 } |
| 808 | |
| 767 | 809 // Fix things up for errors or interrupts. The parser is never called |
| 810 // recursively, so it is always safe to reinitialize its state before | |
| 811 // doing any parsing. | |
| 812 | |
| 1 | 813 void |
| 814 reset_parser (void) | |
| 815 { | |
| 1826 | 816 // Start off on the right foot. |
| 4323 | 817 BEGIN (INITIAL); |
| 4318 | 818 |
| 3883 | 819 parser_end_of_input = false; |
| 4238 | 820 end_tokens_expected = 0; |
| 821 | |
| 822 while (! symtab_context.empty ()) | |
| 823 symtab_context.pop (); | |
| 287 | 824 |
| 7336 | 825 symbol_table::reset_parent_scope (); |
| 826 | |
| 1826 | 827 // We do want a prompt by default. |
| 1 | 828 promptflag = 1; |
| 287 | 829 |
| 3351 | 830 // Error may have occurred inside some brackets, braces, or parentheses. |
| 985 | 831 nesting_level.clear (); |
| 287 | 832 |
| 1826 | 833 // Clear out the stack of token info used to track line and column |
| 834 // numbers. | |
| 143 | 835 while (! token_stack.empty ()) |
| 4214 | 836 { |
| 837 delete token_stack.top (); | |
| 838 token_stack.pop (); | |
| 839 } | |
| 287 | 840 |
| 1826 | 841 // Can be reset by defining a function. |
| 985 | 842 if (! (reading_script_file || reading_fcn_file)) |
| 843 { | |
| 844 current_input_column = 1; | |
| 2926 | 845 input_line_number = command_editor::current_command_number () - 1; |
| 985 | 846 } |
| 287 | 847 |
| 1826 | 848 // Only ask for input from stdin if we are expecting interactive |
| 849 // input. | |
| 3174 | 850 if ((interactive || forced_interactive) |
| 3880 | 851 && ! (reading_fcn_file |
| 852 || reading_script_file | |
| 853 || get_input_from_eval_string | |
| 3174 | 854 || input_from_startup_file)) |
| 287 | 855 yyrestart (stdin); |
| 991 | 856 |
| 1826 | 857 // Clear the buffer for help text. |
| 4426 | 858 while (! help_buf.empty ()) |
| 859 help_buf.pop (); | |
| 1755 | 860 |
| 1826 | 861 // Reset other flags. |
| 862 lexer_flags.init (); | |
| 1 | 863 } |
| 864 | |
| 767 | 865 // If we read some newlines, we need figure out what column we're |
| 866 // really looking at. | |
| 867 | |
| 1 | 868 static void |
| 869 fixup_column_count (char *s) | |
| 870 { | |
| 871 char c; | |
| 872 while ((c = *s++) != '\0') | |
| 873 { | |
| 874 if (c == '\n') | |
| 143 | 875 current_input_column = 1; |
| 1 | 876 else |
| 877 current_input_column++; | |
| 878 } | |
| 879 } | |
| 880 | |
| 767 | 881 // Include these so that we don't have to link to libfl.a. |
| 246 | 882 |
| 3332 | 883 int |
| 1 | 884 yywrap (void) |
| 885 { | |
| 287 | 886 return 1; |
| 1 | 887 } |
| 888 | |
| 767 | 889 // Tell us all what the current buffer is. |
| 890 | |
| 1 | 891 YY_BUFFER_STATE |
| 892 current_buffer (void) | |
| 893 { | |
| 894 return YY_CURRENT_BUFFER; | |
| 895 } | |
| 896 | |
| 767 | 897 // Create a new buffer. |
| 898 | |
| 1 | 899 YY_BUFFER_STATE |
| 900 create_buffer (FILE *f) | |
| 901 { | |
| 902 return yy_create_buffer (f, YY_BUF_SIZE); | |
| 903 } | |
| 904 | |
| 767 | 905 // Start reading a new buffer. |
| 906 | |
| 1 | 907 void |
| 908 switch_to_buffer (YY_BUFFER_STATE buf) | |
| 909 { | |
| 910 yy_switch_to_buffer (buf); | |
| 911 } | |
| 912 | |
| 767 | 913 // Delete a buffer. |
| 914 | |
| 1 | 915 void |
| 916 delete_buffer (YY_BUFFER_STATE buf) | |
| 917 { | |
| 918 yy_delete_buffer (buf); | |
| 919 } | |
| 920 | |
| 767 | 921 // Restore a buffer (for unwind-prot). |
| 922 | |
| 1 | 923 void |
| 924 restore_input_buffer (void *buf) | |
| 925 { | |
| 2861 | 926 switch_to_buffer (static_cast<YY_BUFFER_STATE> (buf)); |
| 1 | 927 } |
| 928 | |
| 767 | 929 // Delete a buffer (for unwind-prot). |
| 930 | |
| 1 | 931 void |
| 932 delete_input_buffer (void *buf) | |
| 933 { | |
| 2861 | 934 delete_buffer (static_cast<YY_BUFFER_STATE> (buf)); |
| 1 | 935 } |
| 936 | |
| 4238 | 937 static void |
| 938 prep_for_function (void) | |
| 939 { | |
| 940 end_tokens_expected++; | |
| 941 | |
| 942 promptflag--; | |
| 943 | |
| 944 lexer_flags.defining_func = true; | |
| 945 lexer_flags.parsed_function_name = false; | |
| 946 | |
| 947 if (! (reading_fcn_file || reading_script_file)) | |
| 948 input_line_number = 1; | |
| 949 } | |
| 950 | |
| 951 static void | |
| 952 prep_for_nested_function (void) | |
| 953 { | |
| 4240 | 954 lexer_flags.parsing_nested_function = 1; |
| 4426 | 955 help_buf.push (std::string ()); |
| 4238 | 956 prep_for_function (); |
| 4240 | 957 // We're still only expecting one end token for this set of functions. |
| 958 end_tokens_expected--; | |
| 4238 | 959 yylval.tok_val = new token (input_line_number, current_input_column); |
| 960 token_stack.push (yylval.tok_val); | |
| 961 } | |
| 962 | |
| 963 // Handle keywords. Return -1 if the keyword should be ignored. | |
| 767 | 964 |
| 1 | 965 static int |
| 4867 | 966 is_keyword_token (const std::string& s) |
| 1 | 967 { |
| 3805 | 968 int l = input_line_number; |
| 969 int c = current_input_column; | |
| 970 | |
| 1823 | 971 int len = s.length (); |
| 922 | 972 |
| 5088 | 973 const octave_kw *kw = octave_kw_hash::in_word_set (s.c_str (), len); |
| 191 | 974 |
| 1497 | 975 if (kw) |
| 143 | 976 { |
| 1497 | 977 yylval.tok_val = 0; |
| 978 | |
| 979 switch (kw->kw_id) | |
| 980 { | |
| 981 case break_kw: | |
| 2764 | 982 case case_kw: |
| 1497 | 983 case catch_kw: |
| 984 case continue_kw: | |
| 985 case else_kw: | |
| 986 case elseif_kw: | |
| 987 case global_kw: | |
| 2764 | 988 case otherwise_kw: |
| 1497 | 989 case return_kw: |
| 2846 | 990 case static_kw: |
| 3484 | 991 case until_kw: |
| 1497 | 992 case unwind_protect_cleanup_kw: |
| 993 break; | |
| 994 | |
| 995 case end_kw: | |
| 4234 | 996 if (lexer_flags.looking_at_object_index) |
| 997 return 0; | |
| 998 else | |
| 4238 | 999 { |
| 1000 if (reading_fcn_file && end_tokens_expected == 1) | |
| 1001 return -1; | |
| 1002 else | |
| 1003 { | |
| 1004 yylval.tok_val = new token (token::simple_end, l, c); | |
| 1005 end_tokens_expected--; | |
| 1006 } | |
| 1007 } | |
| 1497 | 1008 break; |
| 1009 | |
| 1010 case end_try_catch_kw: | |
| 4238 | 1011 end_tokens_expected--; |
| 1497 | 1012 yylval.tok_val = new token (token::try_catch_end, l, c); |
| 1013 break; | |
| 1014 | |
| 1015 case end_unwind_protect_kw: | |
| 4238 | 1016 end_tokens_expected--; |
| 1497 | 1017 yylval.tok_val = new token (token::unwind_protect_end, l, c); |
| 1018 break; | |
| 1019 | |
| 1020 case endfor_kw: | |
| 4238 | 1021 end_tokens_expected--; |
| 1497 | 1022 yylval.tok_val = new token (token::for_end, l, c); |
| 1023 break; | |
| 1024 | |
| 1025 case endfunction_kw: | |
| 4238 | 1026 { |
| 1027 if (reading_fcn_file && end_tokens_expected == 1) | |
| 1028 return -1; | |
| 1029 else | |
| 1030 { | |
| 1031 yylval.tok_val = new token (token::function_end, l, c); | |
| 1032 end_tokens_expected--; | |
| 1033 } | |
| 1034 } | |
| 1497 | 1035 break; |
| 1036 | |
| 1037 case endif_kw: | |
| 4238 | 1038 end_tokens_expected--; |
| 1497 | 1039 yylval.tok_val = new token (token::if_end, l, c); |
| 1040 break; | |
| 1041 | |
| 2764 | 1042 case endswitch_kw: |
| 4238 | 1043 end_tokens_expected--; |
| 2764 | 1044 yylval.tok_val = new token (token::switch_end, l, c); |
| 1045 break; | |
| 1046 | |
| 1497 | 1047 case endwhile_kw: |
| 4238 | 1048 end_tokens_expected--; |
| 1497 | 1049 yylval.tok_val = new token (token::while_end, l, c); |
| 1050 break; | |
| 1051 | |
| 1052 case for_kw: | |
| 1053 case while_kw: | |
| 4238 | 1054 end_tokens_expected++; |
| 1055 // Fall through... | |
| 1056 | |
| 1057 case do_kw: | |
| 1497 | 1058 promptflag--; |
| 1826 | 1059 lexer_flags.looping++; |
| 1497 | 1060 break; |
| 1061 | |
| 1062 case if_kw: | |
| 1063 case try_kw: | |
| 2764 | 1064 case switch_kw: |
| 1497 | 1065 case unwind_protect_kw: |
| 4238 | 1066 end_tokens_expected++; |
| 1497 | 1067 promptflag--; |
| 1068 break; | |
| 1069 | |
| 1070 case function_kw: | |
| 4238 | 1071 { |
| 1072 if (lexer_flags.defining_func) | |
| 1073 { | |
| 1074 if (reading_fcn_file) | |
| 1075 { | |
| 1076 if (lexer_flags.parsing_nested_function) | |
| 1077 { | |
| 4323 | 1078 BEGIN (NESTED_FUNCTION_END); |
| 4240 | 1079 |
| 4238 | 1080 yylval.tok_val = new token (token::function_end, l, c); |
| 4240 | 1081 token_stack.push (yylval.tok_val); |
| 1082 | |
| 1083 return END; | |
| 4238 | 1084 } |
| 1085 else | |
| 1086 { | |
| 1087 prep_for_nested_function (); | |
| 4240 | 1088 |
| 4238 | 1089 return FCN; |
| 1090 } | |
| 1091 } | |
| 1092 else | |
| 1093 { | |
| 1094 error ("nested functions not implemented in this context"); | |
| 1095 | |
| 1096 if ((reading_fcn_file || reading_script_file) | |
| 1097 && ! curr_fcn_file_name.empty ()) | |
| 1098 error ("near line %d of file `%s.m'", | |
| 1099 input_line_number, curr_fcn_file_name.c_str ()); | |
| 1100 else | |
| 1101 error ("near line %d", input_line_number); | |
| 1102 | |
| 1103 return LEXICAL_ERROR; | |
| 1104 } | |
| 1105 } | |
| 1106 else | |
| 1107 prep_for_function (); | |
| 1108 } | |
| 1497 | 1109 break; |
| 1110 | |
| 3174 | 1111 case magic_file_kw: |
| 1112 { | |
| 1113 if ((reading_fcn_file || reading_script_file) | |
| 1114 && ! curr_fcn_file_full_name.empty ()) | |
| 1115 yylval.tok_val = new token (curr_fcn_file_full_name, l, c); | |
| 1116 else | |
| 1117 yylval.tok_val = new token ("stdin", l, c); | |
| 1118 } | |
| 1119 break; | |
| 1120 | |
| 1121 case magic_line_kw: | |
| 1122 yylval.tok_val = new token (static_cast<double> (l), "", l, c); | |
| 1123 break; | |
| 1124 | |
| 1497 | 1125 default: |
| 1126 panic_impossible (); | |
| 1127 } | |
| 1128 | |
| 1129 if (! yylval.tok_val) | |
| 1130 yylval.tok_val = new token (l, c); | |
| 1131 | |
| 476 | 1132 token_stack.push (yylval.tok_val); |
| 1497 | 1133 |
| 1134 return kw->tok; | |
| 143 | 1135 } |
| 1 | 1136 |
| 1137 return 0; | |
| 1138 } | |
| 1139 | |
| 2702 | 1140 static bool |
| 3523 | 1141 is_variable (const std::string& name) |
| 2702 | 1142 { |
| 7336 | 1143 return symbol_table::is_variable (name); |
| 2702 | 1144 } |
| 1145 | |
| 1146 static void | |
| 3523 | 1147 force_local_variable (const std::string& name) |
| 2702 | 1148 { |
| 7336 | 1149 octave_value& val = symbol_table::varref (name); |
| 1150 | |
| 1151 if (! val.is_defined ()) | |
| 1152 val = Matrix (); | |
| 2702 | 1153 } |
| 1154 | |
|
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1155 std::string |
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1156 grab_comment_block (stream_reader& reader, bool& eof) |
| 1 | 1157 { |
| 4426 | 1158 std::string buf; |
| 1019 | 1159 |
|
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1160 // TRUE means we are at the beginning of a comment block. |
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1161 bool begin_comment = false; |
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1162 |
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1163 // TRUE means we are currently reading a comment block. |
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1164 bool in_comment = false; |
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1165 |
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1166 bool warned_incompatible = false; |
| 3665 | 1167 |
| 1019 | 1168 int c = 0; |
| 1 | 1169 |
|
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1170 while ((c = reader.getc ()) != EOF) |
| 1019 | 1171 { |
|
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1172 current_input_column++; |
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1173 |
| 2300 | 1174 if (begin_comment) |
| 1175 { | |
| 1176 if (c == '%' || c == '#') | |
| 1177 continue; | |
| 1178 else | |
| 1179 begin_comment = false; | |
| 1180 } | |
| 1181 | |
| 1019 | 1182 if (in_comment) |
| 1 | 1183 { |
| 4426 | 1184 buf += static_cast<char> (c); |
| 1755 | 1185 |
| 1019 | 1186 if (c == '\n') |
| 3427 | 1187 { |
|
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1188 input_line_number++; |
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1189 current_input_column = 0; |
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1190 |
| 3427 | 1191 in_comment = false; |
| 1192 } | |
| 1019 | 1193 } |
| 1194 else | |
| 1195 { | |
| 1196 switch (c) | |
| 991 | 1197 { |
|
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1198 case ' ': |
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1199 case '\t': |
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1200 break; |
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1201 |
| 4037 | 1202 case '#': |
|
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1203 if (! warned_incompatible) |
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1204 { |
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1205 warned_incompatible = true; |
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1206 maybe_gripe_matlab_incompatible_comment (c); |
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1207 } |
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1208 // fall through... |
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1209 |
| 1019 | 1210 case '%': |
| 2300 | 1211 in_comment = true; |
| 1212 begin_comment = true; | |
| 1019 | 1213 break; |
| 777 | 1214 |
| 1019 | 1215 default: |
|
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1216 current_input_column--; |
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1217 reader.ungetc (c); |
| 1019 | 1218 goto done; |
| 1 | 1219 } |
| 1220 } | |
| 1019 | 1221 } |
| 991 | 1222 |
| 1019 | 1223 done: |
| 991 | 1224 |
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1225 if (c == EOF) |
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1226 eof = true; |
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1227 |
| 4426 | 1228 return buf; |
| 1 | 1229 } |
| 1230 | |
|
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1231 class |
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1232 flex_stream_reader : public stream_reader |
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1233 { |
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1234 public: |
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1235 flex_stream_reader (char *buf_arg) : stream_reader (), buf (buf_arg) { } |
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1236 |
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1237 int getc (void) { return ::yyinput (); } |
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1238 int ungetc (int c) { ::yyunput (c, buf); return 0; } |
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1239 |
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1240 private: |
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1241 char *buf; |
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1242 }; |
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1243 |
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1244 static int |
|
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1245 process_comment (bool& eof) |
|
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1246 { |
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1247 eof = false; |
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1248 |
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1249 std::string help_txt; |
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1250 |
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1251 if (! help_buf.empty ()) |
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1252 help_txt = help_buf.top (); |
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1253 |
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1254 flex_stream_reader flex_reader (yytext); |
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1255 |
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1256 std::string txt = grab_comment_block (flex_reader, eof); |
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1257 |
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1258 if (help_txt.empty () && nesting_level.none ()) |
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1259 { |
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1260 if (! help_buf.empty ()) |
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1261 help_buf.pop (); |
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1262 |
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1263 help_buf.push (txt); |
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1264 } |
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1265 |
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1266 octave_comment_buffer::append (txt); |
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1267 |
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1268 current_input_column = 1; |
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1269 lexer_flags.quote_is_transpose = false; |
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1270 lexer_flags.convert_spaces_to_comma = true; |
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1271 |
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1272 if (YY_START == COMMAND_START) |
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1273 BEGIN (INITIAL); |
|
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1274 |
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1275 if (nesting_level.none ()) |
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1276 { |
|
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1277 lexer_flags.doing_rawcommand = false; |
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1278 return '\n'; |
|
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1279 } |
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1280 else if (nesting_level.is_bracket_or_brace ()) |
|
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1281 return ';'; |
|
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1282 else |
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1283 return 0; |
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1284 } |
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|
1285 |
| 767 | 1286 // Return 1 if the given character matches any character in the given |
| 1287 // string. | |
| 1288 | |
| 2857 | 1289 static bool |
| 2804 | 1290 match_any (char c, const char *s) |
| 1 | 1291 { |
| 1292 char tmp; | |
| 1293 while ((tmp = *s++) != '\0') | |
| 1294 { | |
| 1295 if (c == tmp) | |
| 2857 | 1296 return true; |
| 1 | 1297 } |
| 2857 | 1298 return false; |
| 1 | 1299 } |
| 1300 | |
| 767 | 1301 // Given information about the spacing surrounding an operator, |
| 1302 // return 1 if it looks like it should be treated as a binary | |
| 1303 // operator. For example, | |
| 1304 // | |
| 3774 | 1305 // [ 1 + 2 ] or [ 1+ 2] or [ 1+2 ] ==> binary |
| 1306 // | |
| 1307 // [ 1 +2 ] ==> unary | |
| 767 | 1308 |
| 2857 | 1309 static bool |
| 3246 | 1310 looks_like_bin_op (bool spc_prev, int next_char) |
| 1 | 1311 { |
| 3246 | 1312 bool spc_next = (next_char == ' ' || next_char == '\t'); |
| 1313 | |
| 608 | 1314 return ((spc_prev && spc_next) || ! spc_prev); |
| 1 | 1315 } |
| 1316 | |
| 3263 | 1317 // Recognize separators. If the separator is a CRLF pair, it is |
| 1318 // replaced by a single LF. | |
| 1319 | |
| 1320 static bool | |
| 1321 next_token_is_sep_op (void) | |
| 1322 { | |
| 1323 bool retval = false; | |
| 1324 | |
| 1325 int c1 = yyinput (); | |
| 1326 | |
| 1327 if (c1 == '\r') | |
| 1328 { | |
| 1329 int c2 = yyinput (); | |
| 1330 | |
| 1331 if (c2 == '\n') | |
| 1332 { | |
| 1333 c1 = '\n'; | |
| 1334 | |
| 1335 retval = true; | |
| 1336 } | |
| 1337 else | |
| 4410 | 1338 yyunput (c2, yytext); |
| 3263 | 1339 } |
| 1340 else | |
| 1341 retval = match_any (c1, ",;\n]"); | |
| 1342 | |
| 4410 | 1343 yyunput (c1, yytext); |
| 3263 | 1344 |
| 1345 return retval; | |
| 1346 } | |
| 1347 | |
| 767 | 1348 // Try to determine if the next token should be treated as a postfix |
| 1349 // unary operator. This is ugly, but it seems to do the right thing. | |
| 1350 | |
| 2857 | 1351 static bool |
| 3246 | 1352 next_token_is_postfix_unary_op (bool spc_prev) |
| 1 | 1353 { |
| 2857 | 1354 bool un_op = false; |
| 1 | 1355 |
| 1356 int c0 = yyinput (); | |
| 1357 | |
| 3246 | 1358 if (c0 == '\'' && ! spc_prev) |
| 1359 { | |
| 1360 un_op = true; | |
| 1361 } | |
| 1362 else if (c0 == '.') | |
| 1363 { | |
| 1364 int c1 = yyinput (); | |
| 1365 un_op = (c1 == '\''); | |
| 4410 | 1366 yyunput (c1, yytext); |
| 3246 | 1367 } |
| 4613 | 1368 else if (c0 == '+') |
| 1369 { | |
| 1370 int c1 = yyinput (); | |
| 1371 un_op = (c1 == '+'); | |
| 1372 yyunput (c1, yytext); | |
| 1373 } | |
| 1374 else if (c0 == '-') | |
| 1375 { | |
| 1376 int c1 = yyinput (); | |
| 1377 un_op = (c1 == '-'); | |
| 1378 yyunput (c1, yytext); | |
| 1379 } | |
| 1 | 1380 |
| 4410 | 1381 yyunput (c0, yytext); |
| 1 | 1382 |
| 1383 return un_op; | |
| 1384 } | |
| 1385 | |
| 767 | 1386 // Try to determine if the next token should be treated as a binary |
| 3246 | 1387 // operator. |
| 1521 | 1388 // |
| 3246 | 1389 // This kluge exists because whitespace is not always ignored inside |
| 3774 | 1390 // the square brackets that are used to create matrix objects (though |
| 1391 // spacing only really matters in the cases that can be interpreted | |
| 1392 // either as binary ops or prefix unary ops: currently just +, -). | |
| 1393 // | |
| 3779 | 1394 // Note that a line continuation directly following a + or - operator |
| 1395 // (e.g., the characters '[' 'a' ' ' '+' '\' LFD 'b' ']') will be | |
| 1396 // parsed as a binary operator. | |
| 767 | 1397 |
| 2857 | 1398 static bool |
| 3246 | 1399 next_token_is_bin_op (bool spc_prev) |
| 1 | 1400 { |
| 2857 | 1401 bool bin_op = false; |
| 1 | 1402 |
| 1403 int c0 = yyinput (); | |
| 1404 | |
| 1405 switch (c0) | |
| 1406 { | |
| 777 | 1407 case '+': |
| 1408 case '-': | |
| 3774 | 1409 { |
| 1410 int c1 = yyinput (); | |
| 1411 | |
| 1412 switch (c1) | |
| 1413 { | |
| 1414 case '+': | |
| 1415 case '-': | |
| 1416 // Unary ops, spacing doesn't matter. | |
| 1417 break; | |
| 1418 | |
| 1419 case '=': | |
| 1420 // Binary ops, spacing doesn't matter. | |
| 1421 bin_op = true; | |
| 1422 break; | |
| 1423 | |
| 1424 default: | |
| 1425 // Could be either, spacing matters. | |
| 1426 bin_op = looks_like_bin_op (spc_prev, c1); | |
| 1427 break; | |
| 1428 } | |
| 1429 | |
| 4410 | 1430 yyunput (c1, yytext); |
| 3774 | 1431 } |
| 1432 break; | |
| 1433 | |
| 1434 case ':': | |
| 3246 | 1435 case '/': |
| 1436 case '\\': | |
| 1437 case '^': | |
| 3774 | 1438 // Always a binary op (may also include /=, \=, and ^=). |
| 1439 bin_op = true; | |
| 1276 | 1440 break; |
| 1441 | |
| 3246 | 1442 // .+ .- ./ .\ .^ .* .** |
| 1554 | 1443 case '.': |
| 1444 { | |
| 1445 int c1 = yyinput (); | |
| 3246 | 1446 |
| 3774 | 1447 if (match_any (c1, "+-/\\^*")) |
| 1448 // Always a binary op (may also include .+=, .-=, ./=, ...). | |
| 1449 bin_op = true; | |
| 3698 | 1450 else if (! isdigit (c1) && c1 != ' ' && c1 != '\t' && c1 != '.') |
| 3774 | 1451 // A structure element reference is a binary op. |
| 1452 bin_op = true; | |
| 3246 | 1453 |
| 4410 | 1454 yyunput (c1, yytext); |
| 1554 | 1455 } |
| 1456 break; | |
| 1457 | |
| 3246 | 1458 // = == & && | || * ** |
| 1459 case '=': | |
| 1 | 1460 case '&': |
| 3246 | 1461 case '|': |
| 1 | 1462 case '*': |
| 3774 | 1463 // Always a binary op (may also include ==, &&, ||, **). |
| 1464 bin_op = true; | |
| 3246 | 1465 break; |
| 1466 | |
| 3774 | 1467 // < <= <> > >= |
| 1 | 1468 case '<': |
| 1469 case '>': | |
| 3774 | 1470 // Always a binary op (may also include <=, <>, >=). |
| 1471 bin_op = true; | |
| 1472 break; | |
| 1473 | |
| 1474 // ~= != | |
| 777 | 1475 case '~': |
| 1476 case '!': | |
| 3246 | 1477 { |
| 1478 int c1 = yyinput (); | |
| 1479 | |
| 3774 | 1480 // ~ and ! can be unary ops, so require following =. |
| 1481 if (c1 == '=') | |
| 1482 bin_op = true; | |
| 3246 | 1483 |
| 4410 | 1484 yyunput (c1, yytext); |
| 3246 | 1485 } |
| 1 | 1486 break; |
| 1487 | |
| 1488 default: | |
| 1276 | 1489 break; |
| 1 | 1490 } |
| 1491 | |
| 4410 | 1492 yyunput (c0, yytext); |
| 1 | 1493 |
| 1494 return bin_op; | |
| 1495 } | |
| 1496 | |
| 767 | 1497 // Used to delete trailing white space from tokens. |
| 1498 | |
| 3536 | 1499 static std::string |
| 1 | 1500 strip_trailing_whitespace (char *s) |
| 1501 { | |
| 3523 | 1502 std::string retval = s; |
| 1 | 1503 |
| 1823 | 1504 size_t pos = retval.find_first_of (" \t"); |
| 1 | 1505 |
| 1823 | 1506 if (pos != NPOS) |
| 1507 retval.resize (pos); | |
| 1 | 1508 |
| 1509 return retval; | |
| 1510 } | |
| 1511 | |
| 3665 | 1512 static void |
| 1513 scan_for_comments (const char *text) | |
| 1514 { | |
| 1515 std::string comment_buf; | |
| 1516 | |
| 1517 bool in_comment = false; | |
| 1518 bool beginning_of_comment = false; | |
| 1519 | |
| 1520 int len = strlen (text); | |
| 1521 int i = 0; | |
| 1522 | |
| 1523 while (i < len) | |
| 1524 { | |
| 1525 char c = text[i++]; | |
| 1526 | |
| 1527 switch (c) | |
| 1528 { | |
| 1529 case '%': | |
| 1530 case '#': | |
| 1531 if (in_comment) | |
| 1532 { | |
| 1533 if (! beginning_of_comment) | |
| 3802 | 1534 comment_buf += static_cast<char> (c); |
| 3665 | 1535 } |
| 1536 else | |
| 1537 { | |
| 4037 | 1538 maybe_gripe_matlab_incompatible_comment (c); |
| 3665 | 1539 in_comment = true; |
| 1540 beginning_of_comment = true; | |
| 1541 } | |
| 1542 break; | |
| 1543 | |
| 1544 case '\n': | |
| 1545 if (in_comment) | |
| 1546 { | |
| 3802 | 1547 comment_buf += static_cast<char> (c); |
| 3665 | 1548 octave_comment_buffer::append (comment_buf); |
| 1549 comment_buf.resize (0); | |
| 1550 in_comment = false; | |
| 1551 beginning_of_comment = false; | |
| 1552 } | |
| 1553 break; | |
| 1554 | |
| 1555 case '\r': | |
| 1556 if (in_comment) | |
| 3802 | 1557 comment_buf += static_cast<char> (c); |
| 3665 | 1558 if (i < len) |
| 1559 { | |
| 1560 c = text[i++]; | |
| 1561 | |
| 1562 if (c == '\n') | |
| 1563 { | |
| 1564 if (in_comment) | |
| 1565 { | |
| 3802 | 1566 comment_buf += static_cast<char> (c); |
| 3665 | 1567 octave_comment_buffer::append (comment_buf); |
| 1568 in_comment = false; | |
| 1569 beginning_of_comment = false; | |
| 1570 } | |
| 1571 } | |
| 1572 } | |
| 1573 | |
| 1574 default: | |
| 1575 if (in_comment) | |
| 1576 { | |
| 3802 | 1577 comment_buf += static_cast<char> (c); |
| 3665 | 1578 beginning_of_comment = false; |
| 1579 } | |
| 1580 break; | |
| 1581 } | |
| 1582 } | |
| 1583 | |
| 1584 if (! comment_buf.empty ()) | |
| 1585 octave_comment_buffer::append (comment_buf); | |
| 1586 } | |
| 1587 | |
| 1001 | 1588 // Discard whitespace, including comments and continuations. |
| 1088 | 1589 // |
| 1590 // Return value is logical OR of the following values: | |
| 1591 // | |
| 1826 | 1592 // ATE_NOTHING : no spaces to eat |
| 1088 | 1593 // ATE_SPACE_OR_TAB : space or tab in input |
| 1594 // ATE_NEWLINE : bare new line in input | |
| 1001 | 1595 |
| 1826 | 1596 static yum_yum |
| 975 | 1597 eat_whitespace (void) |
| 1598 { | |
| 1826 | 1599 yum_yum retval = ATE_NOTHING; |
| 3665 | 1600 |
| 1601 std::string comment_buf; | |
| 1602 | |
| 2857 | 1603 bool in_comment = false; |
| 3665 | 1604 bool beginning_of_comment = false; |
| 1605 | |
| 1606 int c = 0; | |
| 1607 | |
| 975 | 1608 while ((c = yyinput ()) != EOF) |
| 1609 { | |
| 1610 current_input_column++; | |
| 1611 | |
| 1612 switch (c) | |
| 1613 { | |
| 1614 case ' ': | |
| 1615 case '\t': | |
| 3665 | 1616 if (in_comment) |
| 1617 { | |
| 3802 | 1618 comment_buf += static_cast<char> (c); |
| 3665 | 1619 beginning_of_comment = false; |
| 1620 } | |
| 1088 | 1621 retval |= ATE_SPACE_OR_TAB; |
| 975 | 1622 break; |
| 1623 | |
| 1624 case '\n': | |
| 1088 | 1625 retval |= ATE_NEWLINE; |
| 3665 | 1626 if (in_comment) |
| 1627 { | |
| 3802 | 1628 comment_buf += static_cast<char> (c); |
| 3665 | 1629 octave_comment_buffer::append (comment_buf); |
| 1630 comment_buf.resize (0); | |
| 1631 in_comment = false; | |
| 1632 beginning_of_comment = false; | |
| 1633 } | |
| 975 | 1634 current_input_column = 0; |
| 1635 break; | |
| 1636 | |
| 1637 case '#': | |
| 1638 case '%': | |
| 3665 | 1639 if (in_comment) |
| 1640 { | |
| 1641 if (! beginning_of_comment) | |
| 3802 | 1642 comment_buf += static_cast<char> (c); |
| 3665 | 1643 } |
| 1644 else | |
| 1645 { | |
| 4037 | 1646 maybe_gripe_matlab_incompatible_comment (c); |
| 3665 | 1647 in_comment = true; |
| 1648 beginning_of_comment = true; | |
| 1649 } | |
| 975 | 1650 break; |
| 1651 | |
| 1001 | 1652 case '.': |
| 1653 if (in_comment) | |
| 3665 | 1654 { |
| 3802 | 1655 comment_buf += static_cast<char> (c); |
| 3665 | 1656 beginning_of_comment = false; |
| 1657 break; | |
| 1658 } | |
| 1001 | 1659 else |
| 1660 { | |
| 1661 if (have_ellipsis_continuation ()) | |
| 1662 break; | |
| 1663 else | |
| 1664 goto done; | |
| 1665 } | |
| 1666 | |
| 1667 case '\\': | |
| 1668 if (in_comment) | |
| 3665 | 1669 { |
| 3802 | 1670 comment_buf += static_cast<char> (c); |
| 3665 | 1671 beginning_of_comment = false; |
| 1672 break; | |
| 1673 } | |
| 1001 | 1674 else |
| 1675 { | |
| 3105 | 1676 if (have_continuation ()) |
| 1001 | 1677 break; |
| 1678 else | |
| 1679 goto done; | |
| 1680 } | |
| 1681 | |
| 6187 | 1682 case '\r': |
| 1683 if (in_comment) | |
| 1684 comment_buf += static_cast<char> (c); | |
| 1685 c = yyinput (); | |
| 1686 if (c == EOF) | |
| 1687 break; | |
| 1688 else if (c == '\n') | |
| 1689 { | |
| 1690 retval |= ATE_NEWLINE; | |
| 1691 if (in_comment) | |
| 1692 { | |
| 1693 comment_buf += static_cast<char> (c); | |
| 1694 octave_comment_buffer::append (comment_buf); | |
| 1695 in_comment = false; | |
| 1696 beginning_of_comment = false; | |
| 1697 } | |
| 1698 current_input_column = 0; | |
| 1699 break; | |
| 1700 } | |
| 1701 | |
| 1702 // Fall through... | |
| 1703 | |
| 975 | 1704 default: |
| 1705 if (in_comment) | |
| 3665 | 1706 { |
| 3802 | 1707 comment_buf += static_cast<char> (c); |
| 3665 | 1708 beginning_of_comment = false; |
| 1709 break; | |
| 1710 } | |
| 975 | 1711 else |
| 1712 goto done; | |
| 1713 } | |
| 1714 } | |
| 1715 | |
| 3665 | 1716 if (! comment_buf.empty ()) |
| 1717 octave_comment_buffer::append (comment_buf); | |
| 1718 | |
| 975 | 1719 done: |
| 4410 | 1720 yyunput (c, yytext); |
| 1082 | 1721 current_input_column--; |
| 1001 | 1722 return retval; |
| 975 | 1723 } |
| 1724 | |
| 3220 | 1725 static inline bool |
| 1726 looks_like_hex (const char *s, int len) | |
| 1727 { | |
| 1728 return (len > 2 && s[0] == '0' && (s[1] == 'x' || s[1] == 'X')); | |
| 1729 } | |
| 1730 | |
| 975 | 1731 static void |
| 3246 | 1732 handle_number (void) |
| 972 | 1733 { |
| 3220 | 1734 double value = 0.0; |
| 1735 int nread = 0; | |
| 1736 | |
| 3598 | 1737 if (looks_like_hex (yytext, strlen (yytext))) |
| 3220 | 1738 { |
| 1739 unsigned long ival; | |
| 3598 | 1740 |
| 1741 nread = sscanf (yytext, "%lx", &ival); | |
| 1742 | |
| 3220 | 1743 value = static_cast<double> (ival); |
| 1744 } | |
| 1745 else | |
| 3598 | 1746 { |
| 1747 char *tmp = strsave (yytext); | |
| 1748 | |
| 1749 char *idx = strpbrk (tmp, "Dd"); | |
| 2621 | 1750 |
| 3598 | 1751 if (idx) |
| 1752 *idx = 'e'; | |
| 1753 | |
| 1754 nread = sscanf (tmp, "%lf", &value); | |
| 1755 | |
| 1756 delete [] tmp; | |
| 1757 } | |
| 972 | 1758 |
| 1826 | 1759 // If yytext doesn't contain a valid number, we are in deep doo doo. |
| 985 | 1760 |
| 972 | 1761 assert (nread == 1); |
| 1762 | |
| 3988 | 1763 lexer_flags.quote_is_transpose = true; |
| 1764 lexer_flags.convert_spaces_to_comma = true; | |
| 972 | 1765 |
| 1766 yylval.tok_val = new token (value, yytext, input_line_number, | |
| 1767 current_input_column); | |
| 1768 | |
| 1769 token_stack.push (yylval.tok_val); | |
| 1770 | |
| 1771 current_input_column += yyleng; | |
| 1772 | |
| 1773 do_comma_insert_check (); | |
| 1774 } | |
| 1775 | |
| 1001 | 1776 // We have seen a backslash and need to find out if it should be |
| 1777 // treated as a continuation character. If so, this eats it, up to | |
| 1778 // and including the new line character. | |
| 1779 // | |
| 973 | 1780 // Match whitespace only, followed by a comment character or newline. |
| 1781 // Once a comment character is found, discard all input until newline. | |
| 1782 // If non-whitespace characters are found before comment | |
| 1783 // characters, return 0. Otherwise, return 1. | |
| 1784 | |
| 2857 | 1785 static bool |
| 3096 | 1786 have_continuation (bool trailing_comments_ok) |
| 973 | 1787 { |
| 5765 | 1788 std::ostringstream buf; |
| 973 | 1789 |
| 3665 | 1790 std::string comment_buf; |
| 1791 | |
| 2857 | 1792 bool in_comment = false; |
| 3665 | 1793 bool beginning_of_comment = false; |
| 1794 | |
| 1795 int c = 0; | |
| 1796 | |
| 973 | 1797 while ((c = yyinput ()) != EOF) |
| 1798 { | |
| 3802 | 1799 buf << static_cast<char> (c); |
| 973 | 1800 |
| 1801 switch (c) | |
| 1802 { | |
| 1803 case ' ': | |
| 1804 case '\t': | |
| 3665 | 1805 if (in_comment) |
| 1806 { | |
| 3802 | 1807 comment_buf += static_cast<char> (c); |
| 3665 | 1808 beginning_of_comment = false; |
| 1809 } | |
| 973 | 1810 break; |
| 1811 | |
| 1812 case '%': | |
| 1813 case '#': | |
| 1091 | 1814 if (trailing_comments_ok) |
| 3665 | 1815 { |
| 1816 if (in_comment) | |
| 1817 { | |
| 1818 if (! beginning_of_comment) | |
| 3802 | 1819 comment_buf += static_cast<char> (c); |
| 3665 | 1820 } |
| 1821 else | |
| 1822 { | |
| 4037 | 1823 maybe_gripe_matlab_incompatible_comment (c); |
| 3665 | 1824 in_comment = true; |
| 1825 beginning_of_comment = true; | |
| 1826 } | |
| 1827 } | |
| 1091 | 1828 else |
| 1829 goto cleanup; | |
| 973 | 1830 break; |
| 1831 | |
| 1832 case '\n': | |
| 3665 | 1833 if (in_comment) |
| 1834 { | |
| 3802 | 1835 comment_buf += static_cast<char> (c); |
| 3665 | 1836 octave_comment_buffer::append (comment_buf); |
| 1837 } | |
| 975 | 1838 current_input_column = 0; |
| 1001 | 1839 promptflag--; |
| 4037 | 1840 gripe_matlab_incompatible_continuation (); |
| 2857 | 1841 return true; |
| 973 | 1842 |
| 3263 | 1843 case '\r': |
| 3665 | 1844 if (in_comment) |
| 3802 | 1845 comment_buf += static_cast<char> (c); |
| 3263 | 1846 c = yyinput (); |
| 1847 if (c == EOF) | |
| 1848 break; | |
| 1849 else if (c == '\n') | |
| 1850 { | |
| 3665 | 1851 if (in_comment) |
| 1852 { | |
| 3802 | 1853 comment_buf += static_cast<char> (c); |
| 3665 | 1854 octave_comment_buffer::append (comment_buf); |
| 1855 } | |
| 3263 | 1856 current_input_column = 0; |
| 1857 promptflag--; | |
| 4037 | 1858 gripe_matlab_incompatible_continuation (); |
| 3263 | 1859 return true; |
| 3665 | 1860 } |
| 3263 | 1861 |
| 3802 | 1862 // Fall through... |
| 1863 | |
| 973 | 1864 default: |
| 3665 | 1865 if (in_comment) |
| 1866 { | |
| 3802 | 1867 comment_buf += static_cast<char> (c); |
| 3665 | 1868 beginning_of_comment = false; |
| 1869 } | |
| 1870 else | |
| 1091 | 1871 goto cleanup; |
| 1872 break; | |
| 973 | 1873 } |
| 1874 } | |
| 1875 | |
| 4410 | 1876 yyunput (c, yytext); |
| 2857 | 1877 return false; |
| 973 | 1878 |
| 3096 | 1879 cleanup: |
| 4051 | 1880 |
| 5765 | 1881 std::string s = buf.str (); |
| 4051 | 1882 |
| 1883 int len = s.length (); | |
| 1884 while (len--) | |
| 4410 | 1885 yyunput (s[len], yytext); |
| 3096 | 1886 |
| 2857 | 1887 return false; |
| 973 | 1888 } |
| 1889 | |
| 1001 | 1890 // We have seen a `.' and need to see if it is the start of a |
| 1891 // continuation. If so, this eats it, up to and including the new | |
| 1892 // line character. | |
| 1893 | |
| 2857 | 1894 static bool |
| 3096 | 1895 have_ellipsis_continuation (bool trailing_comments_ok) |
| 973 | 1896 { |
| 1897 char c1 = yyinput (); | |
| 1898 if (c1 == '.') | |
| 1899 { | |
| 1900 char c2 = yyinput (); | |
| 1091 | 1901 if (c2 == '.' && have_continuation (trailing_comments_ok)) |
| 2857 | 1902 return true; |
| 973 | 1903 else |
| 1904 { | |
| 4410 | 1905 yyunput (c2, yytext); |
| 1906 yyunput (c1, yytext); | |
| 973 | 1907 } |
| 1908 } | |
| 1909 else | |
| 4410 | 1910 yyunput (c1, yytext); |
| 973 | 1911 |
| 2857 | 1912 return false; |
| 973 | 1913 } |
| 1914 | |
| 1001 | 1915 // See if we have a continuation line. If so, eat it and the leading |
| 1916 // whitespace on the next line. | |
| 1088 | 1917 // |
| 1918 // Return value is the same as described for eat_whitespace(). | |
| 1001 | 1919 |
| 1826 | 1920 static yum_yum |
| 1001 | 1921 eat_continuation (void) |
| 1922 { | |
| 1826 | 1923 int retval = ATE_NOTHING; |
| 3665 | 1924 |
| 1001 | 1925 int c = yyinput (); |
| 3665 | 1926 |
| 1001 | 1927 if ((c == '.' && have_ellipsis_continuation ()) |
| 3105 | 1928 || (c == '\\' && have_continuation ())) |
| 1001 | 1929 retval = eat_whitespace (); |
| 1930 else | |
| 4410 | 1931 yyunput (c, yytext); |
| 1001 | 1932 |
| 1933 return retval; | |
| 1934 } | |
| 1935 | |
| 973 | 1936 static int |
| 975 | 1937 handle_string (char delim, int text_style) |
| 973 | 1938 { |
| 5765 | 1939 std::ostringstream buf; |
| 973 | 1940 |
| 3805 | 1941 int bos_line = input_line_number; |
| 1942 int bos_col = current_input_column; | |
| 1943 | |
| 973 | 1944 int c; |
| 1031 | 1945 int escape_pending = 0; |
| 973 | 1946 |
| 1947 while ((c = yyinput ()) != EOF) | |
| 1948 { | |
| 1949 current_input_column++; | |
| 1950 | |
| 3105 | 1951 if (c == '\\') |
| 973 | 1952 { |
| 5359 | 1953 if (delim == '\'' || escape_pending) |
| 1053 | 1954 { |
| 3802 | 1955 buf << static_cast<char> (c); |
| 1053 | 1956 escape_pending = 0; |
| 1957 } | |
| 1958 else | |
| 1959 { | |
| 3096 | 1960 if (have_continuation (false)) |
| 1053 | 1961 escape_pending = 0; |
| 1962 else | |
| 1963 { | |
| 3802 | 1964 buf << static_cast<char> (c); |
| 1053 | 1965 escape_pending = 1; |
| 1966 } | |
| 1967 } | |
| 1031 | 1968 continue; |
| 973 | 1969 } |
| 1970 else if (c == '.') | |
| 1971 { | |
| 5359 | 1972 if (delim == '\'' || ! have_ellipsis_continuation (false)) |
| 3802 | 1973 buf << static_cast<char> (c); |
| 973 | 1974 } |
| 1975 else if (c == '\n') | |
| 1976 { | |
| 1053 | 1977 error ("unterminated string constant"); |
| 973 | 1978 break; |
| 1979 } | |
| 1980 else if (c == delim) | |
| 1981 { | |
| 1031 | 1982 if (escape_pending) |
| 3802 | 1983 buf << static_cast<char> (c); |
| 973 | 1984 else |
| 1985 { | |
| 1986 c = yyinput (); | |
| 1987 if (c == delim) | |
| 5102 | 1988 { |
| 1989 buf << static_cast<char> (c); | |
| 1990 if (lexer_flags.doing_rawcommand) | |
| 1991 buf << static_cast<char> (c); | |
| 1992 } | |
| 973 | 1993 else |
| 1994 { | |
| 5102 | 1995 std::string s; |
| 4410 | 1996 yyunput (c, yytext); |
| 5765 | 1997 |
| 5279 | 1998 if (lexer_flags.doing_rawcommand || delim == '\'') |
| 5765 | 1999 s = buf.str (); |
| 5102 | 2000 else |
| 5765 | 2001 s = do_string_escapes (buf.str ()); |
| 975 | 2002 |
| 5102 | 2003 if (text_style && lexer_flags.doing_rawcommand) |
| 2004 s = std::string (1, delim) + s + std::string (1, delim); | |
| 975 | 2005 else |
| 2006 { | |
| 2857 | 2007 lexer_flags.quote_is_transpose = true; |
| 2008 lexer_flags.convert_spaces_to_comma = true; | |
| 975 | 2009 } |
| 2010 | |
| 3805 | 2011 yylval.tok_val = new token (s, bos_line, bos_col); |
| 973 | 2012 token_stack.push (yylval.tok_val); |
| 3400 | 2013 |
| 4037 | 2014 if (delim == '"') |
| 2015 gripe_matlab_incompatible ("\" used as string delimiter"); | |
| 2016 else if (delim == '\'') | |
| 3400 | 2017 gripe_single_quote_string (); |
| 2018 | |
| 5279 | 2019 return delim == '"' ? DQ_STRING : SQ_STRING; |
| 973 | 2020 } |
| 2021 } | |
| 2022 } | |
| 2023 else | |
| 2024 { | |
| 3802 | 2025 buf << static_cast<char> (c); |
| 973 | 2026 } |
| 2027 | |
| 1031 | 2028 escape_pending = 0; |
| 973 | 2029 } |
| 2030 | |
| 2031 return LEXICAL_ERROR; | |
| 2032 } | |
| 2033 | |
| 3208 | 2034 static bool |
| 2035 next_token_is_assign_op (void) | |
| 2036 { | |
| 2037 bool retval = false; | |
| 2038 | |
| 2039 int c0 = yyinput (); | |
| 2040 | |
| 2041 switch (c0) | |
| 2042 { | |
| 2043 case '=': | |
| 2044 { | |
| 2045 int c1 = yyinput (); | |
| 4410 | 2046 yyunput (c1, yytext); |
| 3208 | 2047 if (c1 != '=') |
| 2048 retval = true; | |
| 2049 } | |
| 2050 break; | |
| 2051 | |
| 2052 case '+': | |
| 2053 case '-': | |
| 2054 case '*': | |
| 2055 case '/': | |
| 2056 case '\\': | |
| 2057 case '&': | |
| 2058 case '|': | |
| 2059 { | |
| 2060 int c1 = yyinput (); | |
| 4410 | 2061 yyunput (c1, yytext); |
| 3208 | 2062 if (c1 == '=') |
| 2063 retval = true; | |
| 2064 } | |
| 2065 break; | |
| 2066 | |
| 2067 case '.': | |
| 2068 { | |
| 2069 int c1 = yyinput (); | |
| 2070 if (match_any (c1, "+-*/\\")) | |
| 2071 { | |
| 2072 int c2 = yyinput (); | |
| 4410 | 2073 yyunput (c2, yytext); |
| 3208 | 2074 if (c2 == '=') |
| 2075 retval = true; | |
| 2076 } | |
| 4410 | 2077 yyunput (c1, yytext); |
| 3208 | 2078 } |
| 2079 break; | |
| 2080 | |
| 2081 case '>': | |
| 2082 { | |
| 2083 int c1 = yyinput (); | |
| 2084 if (c1 == '>') | |
| 2085 { | |
| 2086 int c2 = yyinput (); | |
| 4410 | 2087 yyunput (c2, yytext); |
| 3208 | 2088 if (c2 == '=') |
| 2089 retval = true; | |
| 2090 } | |
| 4410 | 2091 yyunput (c1, yytext); |
| 3208 | 2092 } |
| 2093 break; | |
| 2094 | |
| 2095 case '<': | |
| 2096 { | |
| 2097 int c1 = yyinput (); | |
| 2098 if (c1 == '<') | |
| 2099 { | |
| 2100 int c2 = yyinput (); | |
| 4410 | 2101 yyunput (c2, yytext); |
| 3208 | 2102 if (c2 == '=') |
| 2103 retval = true; | |
| 2104 } | |
| 4410 | 2105 yyunput (c1, yytext); |
| 3208 | 2106 } |
| 2107 break; | |
| 2108 | |
| 2109 default: | |
| 2110 break; | |
| 2111 } | |
| 2112 | |
| 4410 | 2113 yyunput (c0, yytext); |
| 3208 | 2114 |
| 2115 return retval; | |
| 2116 } | |
| 2117 | |
| 4633 | 2118 static bool |
| 2119 next_token_is_index_op (void) | |
| 2120 { | |
| 2121 int c = yyinput (); | |
| 2122 yyunput (c, yytext); | |
| 2123 return c == '(' || c == '{'; | |
| 2124 } | |
| 2125 | |
| 4612 | 2126 static int |
| 2127 handle_close_bracket (bool spc_gobbled, int bracket_type) | |
| 971 | 2128 { |
| 4612 | 2129 int retval = bracket_type; |
| 3208 | 2130 |
| 1826 | 2131 if (! nesting_level.none ()) |
| 971 | 2132 { |
| 1826 | 2133 nesting_level.remove (); |
| 4613 | 2134 |
| 2135 if (bracket_type == ']') | |
| 2136 lexer_flags.bracketflag--; | |
| 2137 else if (bracket_type == '}') | |
| 2138 lexer_flags.braceflag--; | |
| 2139 else | |
| 2140 panic_impossible (); | |
| 971 | 2141 } |
| 2142 | |
| 4613 | 2143 if (lexer_flags.bracketflag == 0 && lexer_flags.braceflag == 0) |
| 4323 | 2144 BEGIN (INITIAL); |
| 1001 | 2145 |
| 4608 | 2146 if (bracket_type == ']' |
| 2147 && next_token_is_assign_op () | |
| 2148 && ! lexer_flags.looking_at_return_list) | |
| 971 | 2149 { |
| 3208 | 2150 retval = CLOSE_BRACE; |
| 971 | 2151 } |
| 4613 | 2152 else if ((lexer_flags.bracketflag || lexer_flags.braceflag) |
| 2153 && lexer_flags.convert_spaces_to_comma | |
| 2154 && (nesting_level.is_bracket () | |
| 2155 || (nesting_level.is_brace () | |
| 2156 && ! lexer_flags.looking_at_object_index))) | |
| 971 | 2157 { |
| 4633 | 2158 bool index_op = next_token_is_index_op (); |
| 2159 | |
| 2160 // Don't insert comma if we are looking at something like | |
| 2161 // | |
| 2162 // [x{i}{j}] or [x{i}(j)] | |
| 2163 // | |
| 2164 // but do if we are looking at | |
| 2165 // | |
| 2166 // [x{i} {j}] or [x{i} (j)] | |
| 2167 | |
| 2168 if (spc_gobbled || ! (bracket_type == '}' && index_op)) | |
| 971 | 2169 { |
| 4633 | 2170 bool bin_op = next_token_is_bin_op (spc_gobbled); |
| 2171 | |
| 2172 bool postfix_un_op = next_token_is_postfix_unary_op (spc_gobbled); | |
| 2173 | |
| 2174 bool sep_op = next_token_is_sep_op (); | |
| 2175 | |
| 2176 if (! (postfix_un_op || bin_op || sep_op)) | |
| 2177 { | |
| 2178 maybe_warn_separator_insert (','); | |
| 2179 | |
| 2180 yyunput (',', yytext); | |
| 2181 return retval; | |
| 2182 } | |
| 971 | 2183 } |
| 2184 } | |
| 2185 | |
| 2857 | 2186 lexer_flags.quote_is_transpose = true; |
| 2187 lexer_flags.convert_spaces_to_comma = true; | |
| 3208 | 2188 |
| 2189 return retval; | |
| 971 | 2190 } |
| 2191 | |
| 1072 | 2192 static void |
| 2193 maybe_unput_comma (int spc_gobbled) | |
| 2194 { | |
| 4613 | 2195 if (nesting_level.is_bracket () |
| 2196 || (nesting_level.is_brace () | |
| 2197 && ! lexer_flags.looking_at_object_index)) | |
| 1072 | 2198 { |
| 3246 | 2199 int bin_op = next_token_is_bin_op (spc_gobbled); |
| 1072 | 2200 |
| 3246 | 2201 int postfix_un_op = next_token_is_postfix_unary_op (spc_gobbled); |
| 1072 | 2202 |
| 2203 int c1 = yyinput (); | |
| 2204 int c2 = yyinput (); | |
| 2970 | 2205 |
| 4410 | 2206 yyunput (c2, yytext); |
| 2207 yyunput (c1, yytext); | |
| 2970 | 2208 |
| 3263 | 2209 int sep_op = next_token_is_sep_op (); |
| 2970 | 2210 |
| 1072 | 2211 int dot_op = (c1 == '.' |
| 2212 && (isalpha (c2) || isspace (c2) || c2 == '_')); | |
| 2970 | 2213 |
| 3388 | 2214 if (postfix_un_op || bin_op || sep_op || dot_op) |
| 2215 return; | |
| 2216 | |
| 3985 | 2217 int index_op = (c1 == '(' || c1 == '{'); |
| 3388 | 2218 |
| 4476 | 2219 // If there is no space before the indexing op, we don't insert |
| 2220 // a comma. | |
| 2221 | |
| 2222 if (index_op && ! spc_gobbled) | |
| 2223 return; | |
| 2224 | |
| 2225 maybe_warn_separator_insert (','); | |
| 2226 | |
| 2227 yyunput (',', yytext); | |
| 1072 | 2228 } |
| 2229 } | |
| 2230 | |
| 767 | 2231 // Figure out exactly what kind of token to return when we have seen |
| 4238 | 2232 // an identifier. Handles keywords. Return -1 if the identifier |
| 2233 // should be ignored. | |
| 767 | 2234 |
| 146 | 2235 static int |
| 3974 | 2236 handle_identifier (void) |
| 146 | 2237 { |
| 3974 | 2238 std::string tok = strip_trailing_whitespace (yytext); |
| 2239 | |
| 2240 int c = yytext[yyleng-1]; | |
| 2241 | |
| 2242 int cont_is_spc = eat_continuation (); | |
| 2243 | |
| 2244 int spc_gobbled = (cont_is_spc || c == ' ' || c == '\t'); | |
| 2245 | |
| 2970 | 2246 // If we are expecting a structure element, avoid recognizing |
| 2247 // keywords and other special names and return STRUCT_ELT, which is | |
| 2248 // a string that is also a valid identifier. But first, we have to | |
| 2249 // decide whether to insert a comma. | |
| 747 | 2250 |
| 1826 | 2251 if (lexer_flags.looking_at_indirect_ref) |
| 1072 | 2252 { |
| 2970 | 2253 do_comma_insert_check (); |
| 2254 | |
| 1072 | 2255 maybe_unput_comma (spc_gobbled); |
| 2819 | 2256 |
| 2257 yylval.tok_val = new token (tok, input_line_number, | |
| 2258 current_input_column); | |
| 2259 | |
| 2260 token_stack.push (yylval.tok_val); | |
| 2261 | |
| 2857 | 2262 lexer_flags.quote_is_transpose = true; |
| 2263 lexer_flags.convert_spaces_to_comma = true; | |
| 2819 | 2264 |
| 2265 current_input_column += yyleng; | |
| 2266 | |
| 2970 | 2267 return STRUCT_ELT; |
| 1072 | 2268 } |
| 747 | 2269 |
| 4930 | 2270 int kw_token = is_keyword_token (tok); |
| 2271 | |
| 2272 if (lexer_flags.looking_at_function_handle) | |
| 2273 { | |
| 2274 if (kw_token) | |
| 2275 { | |
| 2276 error ("function handles may not refer to keywords"); | |
| 2277 | |
| 2278 return LEXICAL_ERROR; | |
| 2279 } | |
| 2280 else | |
|
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2281 { |
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2282 yylval.tok_val = new token (tok, input_line_number, |
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2283 current_input_column); |
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2284 |
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2285 token_stack.push (yylval.tok_val); |
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2286 |
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2287 current_input_column += yyleng; |
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2288 lexer_flags.quote_is_transpose = false; |
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2289 lexer_flags.convert_spaces_to_comma = true; |
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2290 |
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2291 return FCN_HANDLE; |
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2292 } |
| 4930 | 2293 } |
| 2294 | |
| 5102 | 2295 // If we have a regular keyword, return it. |
|
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2296 // Keywords can be followed by identifiers. |
| 146 | 2297 |
| 2298 if (kw_token) | |
| 2299 { | |
|
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2300 if (kw_token >= 0) |
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2301 { |
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2302 current_input_column += yyleng; |
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2303 lexer_flags.quote_is_transpose = false; |
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2304 lexer_flags.convert_spaces_to_comma = true; |
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2305 } |
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2306 |
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2307 return kw_token; |
| 146 | 2308 } |
| 2309 | |
| 1826 | 2310 // See if we have a plot keyword (title, using, with, or clear). |
| 146 | 2311 |
| 3480 | 2312 int c1 = yyinput (); |
| 2313 | |
| 2314 bool next_tok_is_paren = (c1 == '('); | |
| 2315 | |
| 2316 bool next_tok_is_eq = false; | |
| 2317 if (c1 == '=') | |
| 2318 { | |
| 2319 int c2 = yyinput (); | |
| 4410 | 2320 yyunput (c2, yytext); |
| 3480 | 2321 |
| 2322 if (c2 != '=') | |
| 2323 next_tok_is_eq = true; | |
| 2324 } | |
| 2325 | |
| 4410 | 2326 yyunput (c1, yytext); |
| 1001 | 2327 |
| 2702 | 2328 // Kluge alert. |
| 2329 // | |
| 2330 // If we are looking at a text style function, set up to gobble its | |
| 2745 | 2331 // arguments. |
| 2332 // | |
| 2333 // If the following token is `=', or if we are parsing a function | |
| 3189 | 2334 // return list or function parameter list, or if we are looking at |
| 2335 // something like [ab,cd] = foo (), force the symbol to be inserted | |
| 2336 // as a variable in the current symbol table. | |
| 2702 | 2337 |
| 4208 | 2338 if (is_command_name (tok) && ! is_variable (tok)) |
| 2702 | 2339 { |
| 2745 | 2340 if (next_tok_is_eq |
| 2341 || lexer_flags.looking_at_return_list | |
|
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2342 || (lexer_flags.looking_at_parameter_list |
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|
2343 && ! lexer_flags.looking_at_initializer_expression) |
| 4101 | 2344 || lexer_flags.looking_at_matrix_or_assign_lhs) |
| 2745 | 2345 { |
| 2346 force_local_variable (tok); | |
| 2347 } | |
| 6067 | 2348 else if (! (next_tok_is_paren || lexer_flags.looking_at_object_index)) |
| 2702 | 2349 { |
| 5102 | 2350 BEGIN (COMMAND_START); |
| 2351 } | |
| 2352 | |
| 6067 | 2353 if (is_rawcommand_name (tok) && ! lexer_flags.looking_at_object_index) |
| 5102 | 2354 { |
| 2355 lexer_flags.doing_rawcommand = true; | |
| 4323 | 2356 BEGIN (COMMAND_START); |
| 2702 | 2357 } |
| 2358 } | |
| 2359 | |
| 4234 | 2360 // Find the token in the symbol table. Beware the magic |
| 2361 // transformation of the end keyword... | |
| 2362 | |
| 2363 if (tok == "end") | |
| 2364 tok = "__end__"; | |
| 146 | 2365 |
| 7336 | 2366 yylval.tok_val = new token (&(symbol_table::insert (tok)), |
| 2367 input_line_number, current_input_column); | |
| 2368 | |
| 146 | 2369 token_stack.push (yylval.tok_val); |
| 2370 | |
| 1826 | 2371 // After seeing an identifer, it is ok to convert spaces to a comma |
| 2372 // (if needed). | |
| 146 | 2373 |
| 2857 | 2374 lexer_flags.convert_spaces_to_comma = true; |
| 146 | 2375 |
| 2877 | 2376 if (! next_tok_is_eq) |
| 2377 { | |
| 2378 lexer_flags.quote_is_transpose = true; | |
| 146 | 2379 |
| 2877 | 2380 do_comma_insert_check (); |
| 2381 | |
| 2382 maybe_unput_comma (spc_gobbled); | |
| 146 | 2383 } |
| 2384 | |
| 2877 | 2385 current_input_column += yyleng; |
| 146 | 2386 |
| 2387 return NAME; | |
| 2388 } | |
| 2389 | |
| 1826 | 2390 void |
| 2391 lexical_feedback::init (void) | |
| 2392 { | |
| 2393 // Not initially defining a matrix list. | |
| 3351 | 2394 bracketflag = 0; |
| 1826 | 2395 |
| 4613 | 2396 // Not initially defining a cell array list. |
| 2397 braceflag = 0; | |
| 2398 | |
| 1826 | 2399 // Not initially inside a loop or if statement. |
| 2400 looping = 0; | |
| 2401 | |
| 2857 | 2402 // Not initially defining a function. |
| 2403 defining_func = false; | |
| 2877 | 2404 parsed_function_name = false; |
| 4240 | 2405 parsing_nested_function = 0; |
| 7336 | 2406 parsing_class_method = false; |
| 2857 | 2407 |
| 4930 | 2408 // Not initiallly looking at a function handle. |
| 2409 looking_at_function_handle = 0; | |
| 2410 | |
| 2857 | 2411 // Not parsing a function return or parameter list. |
| 2412 looking_at_return_list = false; | |
| 2413 looking_at_parameter_list = false; | |
| 2414 | |
|
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|
2415 // Not looking at an argument list initializer expression. |
|
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|
2416 looking_at_initializer_expression = false; |
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|
2417 |
| 3796 | 2418 // Not parsing a matrix or the left hand side of multi-value |
| 2419 // assignment statement. | |
| 2420 looking_at_matrix_or_assign_lhs = false; | |
| 2421 | |
| 4234 | 2422 // Not parsing an object index. |
| 4237 | 2423 looking_at_object_index = 0; |
| 4234 | 2424 |
| 2857 | 2425 // No need to do comma insert or convert spaces to comma at |
| 2426 // beginning of input. | |
| 2427 convert_spaces_to_comma = true; | |
| 2428 do_comma_insert = false; | |
| 2429 | |
| 2430 // Not initially doing any plotting or setting of plot attributes. | |
| 5102 | 2431 doing_rawcommand = false; |
| 2857 | 2432 |
| 1826 | 2433 // Not initially looking at indirect references. |
| 2857 | 2434 looking_at_indirect_ref = false; |
| 1826 | 2435 |
| 2436 // Quote marks strings intially. | |
| 2857 | 2437 quote_is_transpose = false; |
| 1826 | 2438 } |
| 2439 | |
| 4867 | 2440 bool |
| 2441 is_keyword (const std::string& s) | |
| 2442 { | |
| 5088 | 2443 return octave_kw_hash::in_word_set (s.c_str (), s.length ()) != 0; |
| 4867 | 2444 } |
| 2445 | |
| 4264 | 2446 DEFCMD (iskeyword, args, , |
| 2447 "-*- texinfo -*-\n\ | |
| 2448 @deftypefn {Built-in Function} {} iskeyword (@var{name})\n\ | |
| 2449 Return true if @var{name} is an Octave keyword. If @var{name}\n\ | |
| 2450 is omitted, return a list of keywords.\n\ | |
| 2451 @end deftypefn") | |
| 2452 { | |
| 2453 octave_value retval; | |
| 2454 | |
| 2455 int argc = args.length () + 1; | |
| 2456 | |
| 4867 | 2457 string_vector argv = args.make_argv ("iskeyword"); |
| 4264 | 2458 |
| 2459 if (error_state) | |
| 2460 return retval; | |
| 2461 | |
| 2462 if (argc == 1) | |
| 2463 { | |
| 2464 string_vector lst (TOTAL_KEYWORDS); | |
| 2465 | |
| 2466 for (int i = 0; i < TOTAL_KEYWORDS; i++) | |
| 2467 lst[i] = wordlist[i].name; | |
| 2468 | |
| 2469 retval = Cell (lst.qsort ()); | |
| 2470 } | |
| 2471 else if (argc == 2) | |
| 2472 { | |
| 4867 | 2473 retval = is_keyword (argv[1]); |
| 4264 | 2474 } |
| 2475 else | |
| 5823 | 2476 print_usage (); |
| 4264 | 2477 |
| 2478 return retval; | |
| 2479 } | |
| 2480 | |
|
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2481 void |
|
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2482 prep_lexer_for_script (void) |
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2483 { |
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2484 BEGIN (SCRIPT_FILE_BEGIN); |
|
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2485 } |
| 4264 | 2486 |
| 3388 | 2487 static void |
| 2488 maybe_warn_separator_insert (char sep) | |
| 2489 { | |
| 3523 | 2490 std::string nm = curr_fcn_file_full_name; |
| 3388 | 2491 |
| 5794 | 2492 if (nm.empty ()) |
| 2493 warning_with_id ("Octave:separator-insert", | |
| 2494 "potential auto-insertion of `%c' near line %d", | |
| 2495 sep, input_line_number); | |
| 2496 else | |
| 2497 warning_with_id ("Octave:separator-insert", | |
| 2498 "potential auto-insertion of `%c' near line %d of file %s", | |
| 2499 sep, input_line_number, nm.c_str ()); | |
| 3388 | 2500 } |
| 2501 | |
| 3400 | 2502 static void |
| 2503 gripe_single_quote_string (void) | |
| 2504 { | |
| 3523 | 2505 std::string nm = curr_fcn_file_full_name; |
| 3400 | 2506 |
| 5794 | 2507 if (nm.empty ()) |
| 2508 warning_with_id ("Octave:single-quote-string", | |
| 2509 "single quote delimited string near line %d", | |
| 2510 input_line_number); | |
| 2511 else | |
| 2512 warning_with_id ("Octave:single-quote-string", | |
| 2513 "single quote delimited string near line %d of file %s", | |
| 2514 input_line_number, nm.c_str ()); | |
| 3400 | 2515 } |
| 2516 | |
| 4037 | 2517 static void |
| 2518 gripe_matlab_incompatible (const std::string& msg) | |
| 2519 { | |
| 5794 | 2520 warning_with_id ("Octave:matlab-incompatible", |
| 2521 "potential Matlab compatibility problem: %s", | |
| 2522 msg.c_str ()); | |
| 4037 | 2523 } |
| 2524 | |
| 2525 static void | |
| 2526 maybe_gripe_matlab_incompatible_comment (char c) | |
| 2527 { | |
| 2528 if (c == '#') | |
| 2529 gripe_matlab_incompatible ("# used as comment character"); | |
| 2530 } | |
| 2531 | |
| 2532 static void | |
| 2533 gripe_matlab_incompatible_continuation (void) | |
| 2534 { | |
| 2535 gripe_matlab_incompatible ("\\ used as line continuation marker"); | |
| 2536 } | |
| 2537 | |
| 2538 static void | |
| 2539 gripe_matlab_incompatible_operator (const std::string& op) | |
| 2540 { | |
| 2541 std::string t = op; | |
| 2542 int n = t.length (); | |
| 2543 if (t[n-1] == '\n') | |
| 2544 t.resize (n-1); | |
| 2545 gripe_matlab_incompatible (t + " used as operator"); | |
| 2546 } | |
| 2547 | |
|
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2548 static void |
|
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2549 display_token (int tok) |
|
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2550 { |
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2551 switch (tok) |
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2552 { |
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2553 case '=': std::cerr << "'='\n"; break; |
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2554 case ':': std::cerr << "':'\n"; break; |
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2555 case '-': std::cerr << "'-'\n"; break; |
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2556 case '+': std::cerr << "'+'\n"; break; |
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2557 case '*': std::cerr << "'*'\n"; break; |
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2558 case '/': std::cerr << "'/'\n"; break; |
|
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2559 case ADD_EQ: std::cerr << "ADD_EQ\n"; break; |
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2560 case SUB_EQ: std::cerr << "SUB_EQ\n"; break; |
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2561 case MUL_EQ: std::cerr << "MUL_EQ\n"; break; |
|
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2562 case DIV_EQ: std::cerr << "DIV_EQ\n"; break; |
|
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2563 case LEFTDIV_EQ: std::cerr << "LEFTDIV_EQ\n"; break; |
|
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2564 case POW_EQ: std::cerr << "POW_EQ\n"; break; |
|
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2565 case EMUL_EQ: std::cerr << "EMUL_EQ\n"; break; |
|
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2566 case EDIV_EQ: std::cerr << "EDIV_EQ\n"; break; |
|
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2567 case ELEFTDIV_EQ: std::cerr << "ELEFTDIV_EQ\n"; break; |
|
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2568 case EPOW_EQ: std::cerr << "EPOW_EQ\n"; break; |
|
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2569 case AND_EQ: std::cerr << "AND_EQ\n"; break; |
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2570 case OR_EQ: std::cerr << "OR_EQ\n"; break; |
|
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2571 case LSHIFT_EQ: std::cerr << "LSHIFT_EQ\n"; break; |
|
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2572 case RSHIFT_EQ: std::cerr << "RSHIFT_EQ\n"; break; |
|
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2573 case LSHIFT: std::cerr << "LSHIFT\n"; break; |
|
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2574 case RSHIFT: std::cerr << "RSHIFT\n"; break; |
|
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2575 case EXPR_AND_AND: std::cerr << "EXPR_AND_AND\n"; break; |
|
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2576 case EXPR_OR_OR: std::cerr << "EXPR_OR_OR\n"; break; |
|
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2577 case EXPR_AND: std::cerr << "EXPR_AND\n"; break; |
|
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2578 case EXPR_OR: std::cerr << "EXPR_OR\n"; break; |
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2579 case EXPR_NOT: std::cerr << "EXPR_NOT\n"; break; |
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2580 case EXPR_LT: std::cerr << "EXPR_LT\n"; break; |
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2581 case EXPR_LE: std::cerr << "EXPR_LE\n"; break; |
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2582 case EXPR_EQ: std::cerr << "EXPR_EQ\n"; break; |
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2583 case EXPR_NE: std::cerr << "EXPR_NE\n"; break; |
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2584 case EXPR_GE: std::cerr << "EXPR_GE\n"; break; |
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2585 case EXPR_GT: std::cerr << "EXPR_GT\n"; break; |
|
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2586 case LEFTDIV: std::cerr << "LEFTDIV\n"; break; |
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2587 case EMUL: std::cerr << "EMUL\n"; break; |
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2588 case EDIV: std::cerr << "EDIV\n"; break; |
|
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2589 case ELEFTDIV: std::cerr << "ELEFTDIV\n"; break; |
|
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2590 case EPLUS: std::cerr << "EPLUS\n"; break; |
|
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2591 case EMINUS: std::cerr << "EMINUS\n"; break; |
|
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2592 case QUOTE: std::cerr << "QUOTE\n"; break; |
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2593 case TRANSPOSE: std::cerr << "TRANSPOSE\n"; break; |
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2594 case PLUS_PLUS: std::cerr << "PLUS_PLUS\n"; break; |
|
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2595 case MINUS_MINUS: std::cerr << "MINUS_MINUS\n"; break; |
|
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2596 case POW: std::cerr << "POW\n"; break; |
|
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2597 case EPOW: std::cerr << "EPOW\n"; break; |
|
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2598 case NUM: std::cerr << "NUM\n"; break; |
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2599 case IMAG_NUM: std::cerr << "IMAG_NUM\n"; break; |
|
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2600 case STRUCT_ELT: std::cerr << "STRUCT_ELT\n"; break; |
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2601 case NAME: std::cerr << "NAME\n"; break; |
|
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2602 case END: std::cerr << "END\n"; break; |
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2603 case DQ_STRING: std::cerr << "DQ_STRING\n"; break; |
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2604 case SQ_STRING: std::cerr << "SQ_STRING\n"; break; |
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2605 case FOR: std::cerr << "FOR\n"; break; |
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2606 case WHILE: std::cerr << "WHILE\n"; break; |
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2607 case DO: std::cerr << "DO\n"; break; |
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2608 case UNTIL: std::cerr << "UNTIL\n"; break; |
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2609 case IF: std::cerr << "IF\n"; break; |
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2610 case ELSEIF: std::cerr << "ELSEIF\n"; break; |
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2611 case ELSE: std::cerr << "ELSE\n"; break; |
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2612 case SWITCH: std::cerr << "SWITCH\n"; break; |
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2613 case CASE: std::cerr << "CASE\n"; break; |
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2614 case OTHERWISE: std::cerr << "OTHERWISE\n"; break; |
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2615 case BREAK: std::cerr << "BREAK\n"; break; |
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2616 case CONTINUE: std::cerr << "CONTINUE\n"; break; |
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2617 case FUNC_RET: std::cerr << "FUNC_RET\n"; break; |
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2618 case UNWIND: std::cerr << "UNWIND\n"; break; |
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2619 case CLEANUP: std::cerr << "CLEANUP\n"; break; |
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2620 case TRY: std::cerr << "TRY\n"; break; |
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2621 case CATCH: std::cerr << "CATCH\n"; break; |
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2622 case GLOBAL: std::cerr << "GLOBAL\n"; break; |
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2623 case STATIC: std::cerr << "STATIC\n"; break; |
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2624 case FCN_HANDLE: std::cerr << "FCN_HANDLE\n"; break; |
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2625 case END_OF_INPUT: std::cerr << "END_OF_INPUT\n\n"; break; |
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2626 case LEXICAL_ERROR: std::cerr << "LEXICAL_ERROR\n\n"; break; |
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2627 case FCN: std::cerr << "FCN\n"; break; |
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2628 case CLOSE_BRACE: std::cerr << "CLOSE_BRACE\n"; break; |
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2629 case '\n': std::cerr << "\\n\n"; break; |
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2630 case '\r': std::cerr << "\\r\n"; break; |
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2631 case '\t': std::cerr << "TAB\n"; break; |
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2632 default: |
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2633 { |
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2634 if (tok < 256) |
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2635 std::cerr << static_cast<char> (tok) << "\n"; |
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2636 else |
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2637 std::cerr << "UNKNOWN(" << tok << ")\n"; |
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2638 } |
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2639 break; |
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2640 } |
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2641 } |
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2642 |
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2643 DEFUN (__display_tokens__, args, nargout, |
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2644 "-*- texinfo -*-\n\ |
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2645 @deftypefn {Built-in Function} {} __display_tokens__\n\ |
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2646 Query or set the internal variable that determines whether Octave's\n\ |
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2647 lexer displays tokens as they are read.\n\ |
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2648 @end deftypefn") |
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2649 { |
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2650 return SET_INTERNAL_VARIABLE (display_tokens); |
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2651 } |
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2652 |
| 4910 | 2653 DEFUN (__token_count__, , , |
| 2654 "-*- texinfo -*-\n\ | |
| 2655 @deftypefn {Built-in Function} {} __token_count__\n\ | |
| 2656 Number of language tokens processed since Octave startup.\n\ | |
| 2657 @end deftypefn") | |
| 2658 { | |
| 2659 return octave_value (Vtoken_count); | |
| 2660 } | |
| 2661 | |
| 1994 | 2662 /* |
| 2663 ;;; Local Variables: *** | |
| 2664 ;;; mode: C++ *** | |
| 2665 ;;; End: *** | |
| 2666 */ |