|
1994
|
1 /* |
|
1
|
2 |
|
2847
|
3 Copyright (C) 1996, 1997 John W. Eaton |
|
1
|
4 |
|
|
5 This file is part of Octave. |
|
|
6 |
|
|
7 Octave is free software; you can redistribute it and/or modify it |
|
|
8 under the terms of the GNU General Public License as published by the |
|
|
9 Free Software Foundation; either version 2, or (at your option) any |
|
|
10 later version. |
|
|
11 |
|
|
12 Octave is distributed in the hope that it will be useful, but WITHOUT |
|
|
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
|
|
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
|
|
15 for more details. |
|
|
16 |
|
|
17 You should have received a copy of the GNU General Public License |
|
|
18 along with GNU CC; see the file COPYING. If not, write to the Free |
|
1315
|
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
|
1
|
20 |
|
|
21 */ |
|
|
22 |
|
|
23 %s TEXT_FCN |
|
|
24 %s MATRIX |
|
|
25 |
|
|
26 %{ |
|
240
|
27 #ifdef HAVE_CONFIG_H |
|
1220
|
28 #include <config.h> |
|
240
|
29 #endif |
|
|
30 |
|
1341
|
31 #include <cctype> |
|
|
32 #include <cstring> |
|
|
33 |
|
1823
|
34 #include <string> |
|
|
35 |
|
973
|
36 #include <strstream.h> |
|
522
|
37 |
|
1
|
38 #include "SLStack.h" |
|
|
39 |
|
1497
|
40 // These would be alphabetical, but y.tab.h must be included before |
|
|
41 // oct-gperf.h and y.tab.h must be included after token.h and the tree |
|
|
42 // class declarations. We can't include y.tab.h in oct-gperf.h |
|
|
43 // because it may not be protected to allow it to be included multiple |
|
|
44 // times. |
|
|
45 |
|
2181
|
46 #include "defun.h" |
|
1355
|
47 #include "error.h" |
|
1351
|
48 #include "input.h" |
|
1355
|
49 #include "lex.h" |
|
2891
|
50 #include "ov.h" |
|
1355
|
51 #include "parse.h" |
|
1740
|
52 #include "pt-base.h" |
|
|
53 #include "pt-cmd.h" |
|
2891
|
54 #include "pt-const.h" |
|
1740
|
55 #include "pt-exp.h" |
|
1829
|
56 #include "pt-mat.h" |
|
1740
|
57 #include "pt-misc.h" |
|
|
58 #include "pt-plot.h" |
|
2891
|
59 #include "symtab.h" |
|
|
60 #include "token.h" |
|
|
61 #include "toplev.h" |
|
1355
|
62 #include "utils.h" |
|
|
63 #include "variables.h" |
|
2492
|
64 #include <y.tab.h> |
|
|
65 #include <oct-gperf.h> |
|
1
|
66 |
|
2716
|
67 #if ! (defined (FLEX_SCANNER) \ |
|
|
68 && defined (YY_FLEX_MAJOR_VERSION) && YY_FLEX_MAJOR_VERSION >= 2 \ |
|
|
69 && defined (YY_FLEX_MINOR_VERSION) && YY_FLEX_MINOR_VERSION >= 5) |
|
|
70 #error lex.l requires flex version 2.5.4 or later |
|
|
71 #endif |
|
|
72 |
|
1826
|
73 // Flags that need to be shared between the lexer and parser. |
|
|
74 lexical_feedback lexer_flags; |
|
|
75 |
|
1351
|
76 // Stack to hold tokens so that we can delete them when the parser is |
|
|
77 // reset and avoid growing forever just because we are stashing some |
|
|
78 // information. This has to appear before lex.h is included, because |
|
|
79 // one of the macros defined there uses token_stack. |
|
2614
|
80 // |
|
|
81 // XXX FIXME XXX -- this should really be static, but that causes |
|
|
82 // problems on some systems. |
|
|
83 SLStack <token*> token_stack; |
|
1351
|
84 |
|
1826
|
85 // Did eat_whitespace() eat a space or tab, or a newline, or both? |
|
1
|
86 |
|
1826
|
87 typedef int yum_yum; |
|
1
|
88 |
|
1826
|
89 const yum_yum ATE_NOTHING = 0; |
|
|
90 const yum_yum ATE_SPACE_OR_TAB = 1; |
|
|
91 const yum_yum ATE_NEWLINE = 2; |
|
1088
|
92 |
|
1
|
93 // Is the closest nesting level a square brace or a paren? |
|
1826
|
94 |
|
|
95 class brace_paren_nesting_level : public SLStack <int> |
|
|
96 { |
|
|
97 public: |
|
|
98 |
|
|
99 brace_paren_nesting_level (void) : SLStack<int> () { } |
|
|
100 |
|
|
101 ~brace_paren_nesting_level (void) { } |
|
|
102 |
|
|
103 void brace (void) { push (BRACE); } |
|
|
104 bool is_brace (void) { return ! empty () && top () == BRACE; } |
|
|
105 |
|
|
106 void paren (void) { push (PAREN); } |
|
|
107 bool is_paren (void) { return ! empty () && top () == PAREN; } |
|
985
|
108 |
|
1826
|
109 bool none (void) { return empty (); } |
|
|
110 |
|
|
111 void remove (void) { if (! empty ()) SLStack<int>::pop (); } |
|
|
112 |
|
|
113 private: |
|
|
114 |
|
|
115 enum { BRACE = 1, PAREN = 2 }; |
|
|
116 |
|
|
117 brace_paren_nesting_level (const brace_paren_nesting_level&); |
|
|
118 |
|
|
119 brace_paren_nesting_level& operator = (const brace_paren_nesting_level&); |
|
|
120 }; |
|
|
121 |
|
|
122 static brace_paren_nesting_level nesting_level; |
|
1
|
123 |
|
2167
|
124 // Should whitespace in a literal matrix list be automatically |
|
|
125 // converted to commas and semicolons? |
|
|
126 // |
|
|
127 // user specifies value of var |
|
|
128 // -------------- ------------ |
|
|
129 // "ignore" 2 |
|
|
130 // "traditional" 1 |
|
|
131 // anything else 0 |
|
|
132 // |
|
|
133 // Octave will never insert a comma in a literal matrix list if the |
|
|
134 // user specifies "ignore". For example, the statement [1 2] will |
|
|
135 // result in an error instead of being treated the same as [1, 2], and |
|
|
136 // the statement |
|
|
137 // |
|
|
138 // [ 1, 2, |
|
|
139 // 3, 4 ] |
|
|
140 // |
|
|
141 // will result in the vector [1 2 3 4] instead of a matrix. |
|
|
142 // |
|
|
143 // Traditional behavior makes Octave convert spaces to a comma between |
|
|
144 // identifiers and `('. For example, the statement |
|
|
145 // |
|
|
146 // [eye (2)] |
|
|
147 // |
|
|
148 // will be parsed as |
|
|
149 // |
|
|
150 // [eye, (2)] |
|
|
151 // |
|
|
152 // and will result in an error since the `eye' function will be |
|
|
153 // called with no arguments. To get around this, you would have to |
|
|
154 // omit the space between `eye' and the `('. |
|
|
155 // |
|
|
156 // The default value is 0, which results in behavior that is the same |
|
|
157 // as traditional, except that Octave does not convert spaces to a |
|
|
158 // comma between identifiers and `('. For example, the statement |
|
|
159 // |
|
|
160 // [eye (2)] |
|
|
161 // |
|
|
162 // will result in a call to `eye' with the argument `2'. |
|
|
163 |
|
|
164 static int Vwhitespace_in_literal_matrix; |
|
|
165 |
|
|
166 |
|
146
|
167 // Forward declarations for functions defined at the bottom of this |
|
|
168 // file. |
|
|
169 |
|
1
|
170 static void do_string_escapes (char *s); |
|
|
171 static void fixup_column_count (char *s); |
|
146
|
172 static void do_comma_insert_check (void); |
|
1823
|
173 static int is_plot_keyword (const string& s); |
|
|
174 static int is_keyword (const string& s); |
|
|
175 static string plot_style_token (const string& s); |
|
|
176 static symbol_record *lookup_identifier (const string& s); |
|
1
|
177 static void grab_help_text (void); |
|
2857
|
178 static bool match_any (char c, const char *s); |
|
|
179 static bool next_token_is_bin_op (int spc_prev, char *yytext); |
|
|
180 static bool next_token_is_postfix_unary_op (int spc_prev, char *yytext); |
|
1823
|
181 static string strip_trailing_whitespace (char *s); |
|
972
|
182 static void handle_number (char *yytext); |
|
975
|
183 static int handle_string (char delim, int text_style = 0); |
|
1001
|
184 static int handle_close_brace (int spc_gobbled); |
|
1823
|
185 static int handle_identifier (const string& tok, int spc_gobbled); |
|
2857
|
186 static bool have_continuation (int trailing_comments_ok = 1); |
|
|
187 static bool have_ellipsis_continuation (int trailing_comments_ok = 1); |
|
1826
|
188 static yum_yum eat_whitespace (void); |
|
|
189 static yum_yum eat_continuation (void); |
|
1
|
190 |
|
|
191 %} |
|
|
192 |
|
|
193 D [0-9] |
|
|
194 S [ \t] |
|
2042
|
195 NL ((\n)|(\r\n)) |
|
|
196 SNL ({S}|{NL}) |
|
1
|
197 EL (\.\.\.) |
|
967
|
198 BS (\\) |
|
|
199 CONT ({EL}|{BS}) |
|
1
|
200 Im [iIjJ] |
|
967
|
201 CCHAR [#%] |
|
|
202 COMMENT ({CCHAR}.*{NL}) |
|
|
203 SNLCMT ({SNL}|{COMMENT}) |
|
|
204 NOTEQ ((~=)|(!=)|(<>)) |
|
|
205 POW ((\*\*)|(\^)) |
|
|
206 EPOW (\.{POW}) |
|
|
207 NOT ((\~)|(\!)) |
|
1
|
208 IDENT ([_a-zA-Z][_a-zA-Z0-9]*) |
|
|
209 EXPON ([DdEe][+-]?{D}+) |
|
968
|
210 NUMBER (({D}+\.?{D}*{EXPON}?)|(\.{D}+{EXPON}?)) |
|
1
|
211 %% |
|
|
212 |
|
968
|
213 %{ |
|
|
214 // Help and other text-style functions are a pain in the ass. This |
|
|
215 // stuff needs to be simplified. May require some changes in the |
|
|
216 // parser too. |
|
|
217 %} |
|
|
218 |
|
967
|
219 <TEXT_FCN>{NL} { |
|
|
220 BEGIN 0; |
|
|
221 current_input_column = 1; |
|
2857
|
222 lexer_flags.quote_is_transpose = false; |
|
|
223 lexer_flags.cant_be_identifier = false; |
|
|
224 lexer_flags.convert_spaces_to_comma = true; |
|
967
|
225 return '\n'; |
|
|
226 } |
|
1
|
227 |
|
967
|
228 <TEXT_FCN>[\;\,] { |
|
1826
|
229 if (lexer_flags.doing_set && strcmp (yytext, ",") == 0) |
|
967
|
230 { |
|
1060
|
231 TOK_PUSH_AND_RETURN (yytext, TEXT); |
|
967
|
232 } |
|
|
233 else |
|
|
234 { |
|
|
235 BEGIN 0; |
|
|
236 if (strcmp (yytext, ",") == 0) |
|
|
237 TOK_RETURN (','); |
|
|
238 else |
|
|
239 TOK_RETURN (';'); |
|
|
240 } |
|
|
241 } |
|
1
|
242 |
|
975
|
243 <TEXT_FCN>[\"\'] { |
|
|
244 current_input_column++; |
|
|
245 return handle_string (yytext[0], 1); |
|
|
246 } |
|
|
247 |
|
1
|
248 <TEXT_FCN>[^ \t\n\;\,]*{S}* { |
|
1823
|
249 string tok = strip_trailing_whitespace (yytext); |
|
1060
|
250 TOK_PUSH_AND_RETURN (tok, TEXT); |
|
967
|
251 } |
|
1
|
252 |
|
968
|
253 %{ |
|
1
|
254 // For this and the next two rules, we're looking at ']', and we |
|
971
|
255 // need to know if the next token is `=' or `=='. |
|
1
|
256 // |
|
|
257 // It would have been so much easier if the delimiters were simply |
|
|
258 // different for the expression on the left hand side of the equals |
|
|
259 // operator. |
|
971
|
260 // |
|
|
261 // It's also a pain in the ass to decide whether to insert a comma |
|
|
262 // after seeing a ']' character... |
|
968
|
263 %} |
|
|
264 |
|
2119
|
265 <MATRIX>{SNLCMT}*\]{S}* { |
|
1001
|
266 fixup_column_count (yytext); |
|
|
267 int c = yytext[yyleng-1]; |
|
|
268 int cont_is_spc = eat_continuation (); |
|
|
269 int spc_gobbled = (cont_is_spc || c == ' ' || c == '\t'); |
|
|
270 return handle_close_brace (spc_gobbled); |
|
967
|
271 } |
|
1
|
272 |
|
968
|
273 %{ |
|
1088
|
274 // Commas are element separators in matrix constants. If we don't |
|
|
275 // check for continuations here we can end up inserting too many |
|
|
276 // commas. |
|
968
|
277 %} |
|
|
278 |
|
967
|
279 <MATRIX>{S}*\,{S}* { |
|
1088
|
280 current_input_column += yyleng; |
|
|
281 int tmp = eat_continuation (); |
|
2857
|
282 lexer_flags.quote_is_transpose = false; |
|
|
283 lexer_flags.cant_be_identifier = false; |
|
|
284 lexer_flags.convert_spaces_to_comma = true; |
|
2167
|
285 if (Vwhitespace_in_literal_matrix != 2 |
|
1088
|
286 && (tmp & ATE_NEWLINE) == ATE_NEWLINE) |
|
|
287 unput (';'); |
|
|
288 return (','); |
|
967
|
289 } |
|
1
|
290 |
|
968
|
291 %{ |
|
|
292 // In some cases, spaces in matrix constants can turn into commas. |
|
|
293 // If commas are required, spaces are not important in matrix |
|
1088
|
294 // constants so we just eat them. If we don't check for continuations |
|
|
295 // here we can end up inserting too many commas. |
|
968
|
296 %} |
|
430
|
297 |
|
968
|
298 <MATRIX>{S}+ { |
|
1088
|
299 current_input_column += yyleng; |
|
2167
|
300 if (Vwhitespace_in_literal_matrix != 2) |
|
967
|
301 { |
|
1088
|
302 int tmp = eat_continuation (); |
|
967
|
303 int bin_op = next_token_is_bin_op (1, yytext); |
|
|
304 int postfix_un_op = next_token_is_postfix_unary_op (1, yytext); |
|
|
305 |
|
1826
|
306 if (! (postfix_un_op || bin_op) |
|
|
307 && nesting_level.is_brace () |
|
|
308 && lexer_flags.convert_spaces_to_comma) |
|
1088
|
309 { |
|
2857
|
310 lexer_flags.quote_is_transpose = false; |
|
|
311 lexer_flags.cant_be_identifier = false; |
|
|
312 lexer_flags.convert_spaces_to_comma = true; |
|
1088
|
313 if ((tmp & ATE_NEWLINE) == ATE_NEWLINE) |
|
|
314 unput (';'); |
|
|
315 return (','); |
|
|
316 } |
|
967
|
317 } |
|
|
318 } |
|
430
|
319 |
|
968
|
320 %{ |
|
1088
|
321 // Semicolons are handled as row seprators in matrix constants. If we |
|
|
322 // don't eat whitespace here we can end up inserting too many |
|
|
323 // semicolons. |
|
968
|
324 %} |
|
|
325 |
|
985
|
326 <MATRIX>{SNLCMT}*;{SNLCMT}* { |
|
967
|
327 fixup_column_count (yytext); |
|
1001
|
328 eat_whitespace (); |
|
2857
|
329 lexer_flags.quote_is_transpose = false; |
|
|
330 lexer_flags.cant_be_identifier = false; |
|
|
331 lexer_flags.convert_spaces_to_comma = true; |
|
967
|
332 return ';'; |
|
|
333 } |
|
|
334 |
|
968
|
335 %{ |
|
1088
|
336 // In some cases, new lines can also become row separators. If we |
|
|
337 // don't eat whitespace here we can end up inserting too many |
|
|
338 // semicolons. |
|
985
|
339 %} |
|
|
340 |
|
|
341 <MATRIX>{SNLCMT}*\n{SNLCMT}* { |
|
1082
|
342 fixup_column_count (yytext); |
|
1088
|
343 eat_whitespace (); |
|
2167
|
344 if (Vwhitespace_in_literal_matrix != 2) |
|
985
|
345 { |
|
2857
|
346 lexer_flags.quote_is_transpose = false; |
|
|
347 lexer_flags.cant_be_identifier = false; |
|
|
348 lexer_flags.convert_spaces_to_comma = true; |
|
985
|
349 |
|
1826
|
350 if (nesting_level.none ()) |
|
985
|
351 return LEXICAL_ERROR; |
|
|
352 |
|
1826
|
353 if (nesting_level.is_brace ()) |
|
985
|
354 return ';'; |
|
|
355 } |
|
|
356 } |
|
|
357 |
|
|
358 %{ |
|
968
|
359 // Open and close brace are handled differently if we are in the range |
|
|
360 // part of a plot command. |
|
975
|
361 // |
|
968
|
362 %} |
|
1
|
363 |
|
967
|
364 \[{S}* { |
|
1826
|
365 nesting_level.brace (); |
|
975
|
366 |
|
1082
|
367 current_input_column += yyleng; |
|
2857
|
368 lexer_flags.quote_is_transpose = false; |
|
|
369 lexer_flags.cant_be_identifier = false; |
|
|
370 lexer_flags.convert_spaces_to_comma = true; |
|
975
|
371 |
|
|
372 promptflag--; |
|
|
373 eat_whitespace (); |
|
|
374 |
|
1826
|
375 if (lexer_flags.plotting && ! lexer_flags.past_plot_range) |
|
967
|
376 { |
|
2857
|
377 lexer_flags.in_plot_range = true; |
|
1082
|
378 return OPEN_BRACE; |
|
967
|
379 } |
|
|
380 else |
|
|
381 { |
|
1826
|
382 lexer_flags.braceflag++; |
|
975
|
383 BEGIN MATRIX; |
|
1082
|
384 return '['; |
|
967
|
385 } |
|
|
386 } |
|
1
|
387 |
|
968
|
388 \] { |
|
1826
|
389 nesting_level.remove (); |
|
968
|
390 |
|
1826
|
391 if (lexer_flags.plotting && ! lexer_flags.past_plot_range) |
|
968
|
392 { |
|
2857
|
393 lexer_flags.in_plot_range = false; |
|
968
|
394 TOK_RETURN (CLOSE_BRACE); |
|
|
395 } |
|
|
396 else |
|
|
397 TOK_RETURN (']'); |
|
|
398 } |
|
|
399 |
|
|
400 %{ |
|
|
401 // Imaginary numbers. |
|
|
402 %} |
|
|
403 |
|
|
404 {NUMBER}{Im} { |
|
972
|
405 handle_number (yytext); |
|
968
|
406 return IMAG_NUM; |
|
|
407 } |
|
|
408 |
|
|
409 %{ |
|
|
410 // Real numbers. Don't grab the `.' part of a dot operator as part of |
|
|
411 // the constant. |
|
|
412 %} |
|
|
413 |
|
|
414 {D}+/\.[\*/\\^'] | |
|
|
415 {NUMBER} { |
|
972
|
416 handle_number (yytext); |
|
968
|
417 return NUM; |
|
|
418 } |
|
|
419 |
|
|
420 %{ |
|
|
421 // Eat whitespace. Whitespace inside matrix constants is handled by |
|
|
422 // the <MATRIX> start state code above. |
|
|
423 %} |
|
|
424 |
|
967
|
425 {S}* { |
|
|
426 current_input_column += yyleng; |
|
|
427 } |
|
|
428 |
|
968
|
429 %{ |
|
|
430 // Continuation lines. Allow comments after continuations. |
|
|
431 %} |
|
|
432 |
|
967
|
433 {CONT}{S}*{NL} | |
|
|
434 {CONT}{S}*{COMMENT} { |
|
|
435 promptflag--; |
|
|
436 current_input_column = 1; |
|
|
437 } |
|
1
|
438 |
|
968
|
439 %{ |
|
|
440 // An ellipsis not at the end of a line is not a continuation, but |
|
|
441 // does have another meaning. |
|
|
442 %} |
|
|
443 |
|
967
|
444 {EL} { |
|
|
445 return ELLIPSIS; |
|
|
446 } |
|
1
|
447 |
|
968
|
448 %{ |
|
|
449 // End of file. |
|
|
450 %} |
|
|
451 |
|
967
|
452 <<EOF>> { |
|
|
453 TOK_RETURN (END_OF_INPUT); |
|
|
454 } |
|
1
|
455 |
|
968
|
456 %{ |
|
970
|
457 // Identifiers. Truncate the token at the first space or tab but |
|
|
458 // don't write directly on yytext. |
|
968
|
459 %} |
|
|
460 |
|
967
|
461 {IDENT}{S}* { |
|
1823
|
462 string tok = strip_trailing_whitespace (yytext); |
|
1001
|
463 int c = yytext[yyleng-1]; |
|
|
464 int cont_is_spc = eat_continuation (); |
|
|
465 int spc_gobbled = (cont_is_spc || c == ' ' || c == '\t'); |
|
|
466 return handle_identifier (tok, spc_gobbled); |
|
967
|
467 } |
|
1
|
468 |
|
968
|
469 %{ |
|
|
470 // A new line character. New line characters inside matrix constants |
|
985
|
471 // are handled by the <MATRIX> start state code above. If closest |
|
|
472 // nesting is inside parentheses, don't return a row separator. |
|
968
|
473 %} |
|
|
474 |
|
967
|
475 {NL} { |
|
|
476 current_input_column = 1; |
|
2857
|
477 lexer_flags.quote_is_transpose = false; |
|
|
478 lexer_flags.cant_be_identifier = false; |
|
|
479 lexer_flags.convert_spaces_to_comma = true; |
|
985
|
480 |
|
1826
|
481 if (nesting_level.none ()) |
|
985
|
482 return '\n'; |
|
|
483 |
|
1826
|
484 if (nesting_level.is_brace ()) |
|
985
|
485 return LEXICAL_ERROR; |
|
967
|
486 } |
|
1
|
487 |
|
968
|
488 %{ |
|
|
489 // Single quote can either be the beginning of a string or a transpose |
|
|
490 // operator. |
|
|
491 %} |
|
|
492 |
|
967
|
493 "'" { |
|
|
494 current_input_column++; |
|
2857
|
495 lexer_flags.convert_spaces_to_comma = true; |
|
1
|
496 |
|
1826
|
497 if (lexer_flags.quote_is_transpose) |
|
967
|
498 { |
|
|
499 do_comma_insert_check (); |
|
|
500 return QUOTE; |
|
|
501 } |
|
|
502 else |
|
973
|
503 return handle_string ('\''); |
|
967
|
504 } |
|
1
|
505 |
|
968
|
506 %{ |
|
971
|
507 // Double quotes always begin strings. |
|
|
508 %} |
|
|
509 |
|
973
|
510 \" { |
|
|
511 current_input_column++; |
|
|
512 return handle_string ('"'); |
|
|
513 } |
|
971
|
514 |
|
|
515 %{ |
|
|
516 // The colon operator is handled differently if we are in the range |
|
|
517 // part of a plot command. |
|
968
|
518 %} |
|
|
519 |
|
967
|
520 ":" { |
|
1826
|
521 if (lexer_flags.plotting |
|
|
522 && (lexer_flags.in_plot_range || lexer_flags.in_plot_using)) |
|
2857
|
523 BIN_OP_RETURN (COLON, true); |
|
967
|
524 else |
|
2857
|
525 BIN_OP_RETURN (':', false); |
|
967
|
526 } |
|
1
|
527 |
|
968
|
528 %{ |
|
985
|
529 // Gobble comments. If closest nesting is inside parentheses, don't |
|
|
530 // return a new line. |
|
|
531 %} |
|
968
|
532 |
|
967
|
533 {CCHAR} { |
|
1826
|
534 if (help_buf.empty () |
|
|
535 && lexer_flags.beginning_of_function |
|
|
536 && nesting_level.none ()) |
|
967
|
537 { |
|
|
538 grab_help_text (); |
|
2857
|
539 lexer_flags.beginning_of_function = false; |
|
967
|
540 } |
|
|
541 else |
|
|
542 { |
|
|
543 int c; |
|
|
544 while ((c = yyinput ()) != EOF && c != '\n') |
|
|
545 ; // Eat comment. |
|
|
546 } |
|
440
|
547 |
|
967
|
548 current_input_column = 1; |
|
2857
|
549 lexer_flags.quote_is_transpose = false; |
|
|
550 lexer_flags.cant_be_identifier = false; |
|
|
551 lexer_flags.convert_spaces_to_comma = true; |
|
985
|
552 |
|
1826
|
553 if (nesting_level.none ()) |
|
985
|
554 return '\n'; |
|
1826
|
555 else if (nesting_level.is_brace ()) |
|
1566
|
556 return ';'; |
|
967
|
557 } |
|
440
|
558 |
|
968
|
559 %{ |
|
|
560 // Other operators. |
|
|
561 %} |
|
|
562 |
|
2857
|
563 ".+" { BIN_OP_RETURN (EPLUS, false); } |
|
|
564 ".-" { BIN_OP_RETURN (EMINUS, false); } |
|
|
565 ".*" { BIN_OP_RETURN (EMUL, false); } |
|
|
566 "./" { BIN_OP_RETURN (EDIV, false); } |
|
|
567 ".\\" { BIN_OP_RETURN (ELEFTDIV, false); } |
|
|
568 {EPOW} { BIN_OP_RETURN (EPOW, false); } |
|
|
569 ".'" { do_comma_insert_check (); BIN_OP_RETURN (TRANSPOSE, true); } |
|
|
570 "++" { do_comma_insert_check (); BIN_OP_RETURN (PLUS_PLUS, true); } |
|
|
571 "--" { do_comma_insert_check (); BIN_OP_RETURN (MINUS_MINUS, true); } |
|
|
572 "<=" { BIN_OP_RETURN (EXPR_LE, false); } |
|
|
573 "==" { BIN_OP_RETURN (EXPR_EQ, false); } |
|
|
574 {NOTEQ} { BIN_OP_RETURN (EXPR_NE, false); } |
|
|
575 ">=" { BIN_OP_RETURN (EXPR_GE, false); } |
|
2877
|
576 "&" { BIN_OP_RETURN (EXPR_AND, false); } |
|
2857
|
577 "|" { BIN_OP_RETURN (EXPR_OR, false); } |
|
|
578 "<" { BIN_OP_RETURN (EXPR_LT, false); } |
|
|
579 ">" { BIN_OP_RETURN (EXPR_GT, false); } |
|
|
580 "*" { BIN_OP_RETURN ('*', false); } |
|
|
581 "/" { BIN_OP_RETURN ('/', false); } |
|
|
582 "\\" { BIN_OP_RETURN (LEFTDIV, false); } |
|
|
583 ";" { BIN_OP_RETURN (';', true); } |
|
|
584 "," { BIN_OP_RETURN (',', true); } |
|
|
585 {POW} { BIN_OP_RETURN (POW, false); } |
|
|
586 "=" { BIN_OP_RETURN ('=', true); } |
|
2877
|
587 "&&" { BIN_OP_RETURN (EXPR_AND_AND, false); } |
|
2857
|
588 "||" { BIN_OP_RETURN (EXPR_OR_OR, false); } |
|
967
|
589 |
|
|
590 {NOT} { |
|
1826
|
591 if (lexer_flags.plotting && ! lexer_flags.in_plot_range) |
|
2857
|
592 lexer_flags.past_plot_range = true; |
|
|
593 BIN_OP_RETURN (EXPR_NOT, false); |
|
967
|
594 } |
|
1
|
595 |
|
1276
|
596 "+" { |
|
1826
|
597 if (lexer_flags.plotting && ! lexer_flags.in_plot_range) |
|
2857
|
598 lexer_flags.past_plot_range = true; |
|
|
599 BIN_OP_RETURN ('+', false); |
|
967
|
600 } |
|
|
601 |
|
1276
|
602 "-" { |
|
1826
|
603 if (lexer_flags.plotting && ! lexer_flags.in_plot_range) |
|
2857
|
604 lexer_flags.past_plot_range = true; |
|
|
605 BIN_OP_RETURN ('-', false); |
|
967
|
606 } |
|
|
607 |
|
|
608 "(" { |
|
1826
|
609 if (lexer_flags.plotting && ! lexer_flags.in_plot_range) |
|
2857
|
610 lexer_flags.past_plot_range = true; |
|
1826
|
611 nesting_level.paren (); |
|
985
|
612 promptflag--; |
|
967
|
613 TOK_RETURN ('('); |
|
|
614 } |
|
|
615 |
|
|
616 ")" { |
|
1826
|
617 nesting_level.remove (); |
|
1001
|
618 |
|
967
|
619 current_input_column++; |
|
2857
|
620 lexer_flags.cant_be_identifier = true; |
|
|
621 lexer_flags.quote_is_transpose = true; |
|
1826
|
622 lexer_flags.convert_spaces_to_comma = nesting_level.is_brace (); |
|
1001
|
623 do_comma_insert_check (); |
|
967
|
624 return ')'; |
|
|
625 } |
|
|
626 |
|
2066
|
627 "." { |
|
|
628 TOK_RETURN ('.'); |
|
|
629 } |
|
|
630 |
|
2877
|
631 "+=" { BIN_OP_RETURN (ADD_EQ, false); } |
|
|
632 "-=" { BIN_OP_RETURN (SUB_EQ, false); } |
|
|
633 "*=" { BIN_OP_RETURN (MUL_EQ, false); } |
|
|
634 "/=" { BIN_OP_RETURN (DIV_EQ, false); } |
|
|
635 ".+=" { BIN_OP_RETURN (ADD_EQ, false); } |
|
|
636 ".-=" { BIN_OP_RETURN (SUB_EQ, false); } |
|
|
637 ".*=" { BIN_OP_RETURN (EMUL_EQ, false); } |
|
|
638 "./=" { BIN_OP_RETURN (EDIV_EQ, false); } |
|
|
639 "&=" { BIN_OP_RETURN (AND_EQ, false); } |
|
|
640 "|=" { BIN_OP_RETURN (OR_EQ, false); } |
|
|
641 |
|
968
|
642 %{ |
|
2066
|
643 // Unrecognized input is a lexical error. |
|
968
|
644 %} |
|
1
|
645 |
|
2042
|
646 . { |
|
2066
|
647 current_input_column++; |
|
|
648 |
|
|
649 error ("invalid character `%s' near line %d, column %d", |
|
|
650 undo_string_escape (yytext[0]), input_line_number, |
|
|
651 current_input_column); |
|
|
652 |
|
|
653 return LEXICAL_ERROR; |
|
|
654 } |
|
1
|
655 |
|
|
656 %% |
|
|
657 |
|
767
|
658 // GAG. |
|
|
659 // |
|
|
660 // If we're reading a matrix and the next character is '[', make sure |
|
|
661 // that we insert a comma ahead of it. |
|
|
662 |
|
146
|
663 void |
|
1
|
664 do_comma_insert_check (void) |
|
|
665 { |
|
1001
|
666 int spc_gobbled = eat_continuation (); |
|
1
|
667 int c = yyinput (); |
|
146
|
668 yyunput (c, yytext); |
|
1001
|
669 if (spc_gobbled) |
|
|
670 yyunput (' ', yytext); |
|
1826
|
671 lexer_flags.do_comma_insert = (lexer_flags.braceflag && c == '['); |
|
1
|
672 } |
|
|
673 |
|
767
|
674 // Fix things up for errors or interrupts. The parser is never called |
|
|
675 // recursively, so it is always safe to reinitialize its state before |
|
|
676 // doing any parsing. |
|
|
677 |
|
1
|
678 void |
|
|
679 reset_parser (void) |
|
|
680 { |
|
1826
|
681 // Start off on the right foot. |
|
1
|
682 BEGIN 0; |
|
166
|
683 error_state = 0; |
|
287
|
684 |
|
1826
|
685 // We do want a prompt by default. |
|
1
|
686 promptflag = 1; |
|
287
|
687 |
|
1826
|
688 // Error may have occurred inside some parentheses or braces. |
|
985
|
689 nesting_level.clear (); |
|
287
|
690 |
|
1826
|
691 // Clear out the stack of token info used to track line and column |
|
|
692 // numbers. |
|
143
|
693 while (! token_stack.empty ()) |
|
|
694 delete token_stack.pop (); |
|
287
|
695 |
|
1826
|
696 // Can be reset by defining a function. |
|
985
|
697 if (! (reading_script_file || reading_fcn_file)) |
|
|
698 { |
|
|
699 current_input_column = 1; |
|
|
700 input_line_number = current_command_number - 1; |
|
|
701 } |
|
287
|
702 |
|
1826
|
703 // Only ask for input from stdin if we are expecting interactive |
|
|
704 // input. |
|
338
|
705 if (interactive && ! (reading_fcn_file || get_input_from_eval_string)) |
|
287
|
706 yyrestart (stdin); |
|
991
|
707 |
|
1826
|
708 // Clear the buffer for help text. |
|
|
709 help_buf.resize (0); |
|
1755
|
710 |
|
1826
|
711 // Reset other flags. |
|
|
712 lexer_flags.init (); |
|
1
|
713 } |
|
|
714 |
|
767
|
715 // Replace backslash escapes in a string with the real values. |
|
|
716 |
|
1
|
717 static void |
|
|
718 do_string_escapes (char *s) |
|
|
719 { |
|
|
720 char *p1 = s; |
|
|
721 char *p2 = s; |
|
|
722 while (*p2 != '\0') |
|
|
723 { |
|
|
724 if (*p2 == '\\' && *(p2+1) != '\0') |
|
|
725 { |
|
|
726 switch (*++p2) |
|
|
727 { |
|
|
728 case 'a': |
|
|
729 *p1 = '\a'; |
|
|
730 break; |
|
777
|
731 |
|
1
|
732 case 'b': // backspace |
|
|
733 *p1 = '\b'; |
|
|
734 break; |
|
777
|
735 |
|
1
|
736 case 'f': // formfeed |
|
|
737 *p1 = '\f'; |
|
|
738 break; |
|
777
|
739 |
|
1
|
740 case 'n': // newline |
|
|
741 *p1 = '\n'; |
|
|
742 break; |
|
777
|
743 |
|
1
|
744 case 'r': // carriage return |
|
|
745 *p1 = '\r'; |
|
|
746 break; |
|
777
|
747 |
|
1
|
748 case 't': // horizontal tab |
|
|
749 *p1 = '\t'; |
|
|
750 break; |
|
777
|
751 |
|
1
|
752 case 'v': // vertical tab |
|
|
753 *p1 = '\v'; |
|
|
754 break; |
|
777
|
755 |
|
1
|
756 case '\\': // backslash |
|
|
757 *p1 = '\\'; |
|
|
758 break; |
|
777
|
759 |
|
1
|
760 case '\'': // quote |
|
|
761 *p1 = '\''; |
|
|
762 break; |
|
777
|
763 |
|
1
|
764 case '"': // double quote |
|
|
765 *p1 = '"'; |
|
|
766 break; |
|
777
|
767 |
|
1
|
768 default: |
|
777
|
769 warning ("unrecognized escape sequence `\\%c' --\ |
|
|
770 converting to `%c'", *p2, *p2); |
|
1
|
771 *p1 = *p2; |
|
|
772 break; |
|
|
773 } |
|
|
774 } |
|
|
775 else |
|
|
776 { |
|
|
777 *p1 = *p2; |
|
|
778 } |
|
|
779 |
|
|
780 p1++; |
|
|
781 p2++; |
|
|
782 } |
|
|
783 |
|
|
784 *p1 = '\0'; |
|
|
785 } |
|
|
786 |
|
767
|
787 // If we read some newlines, we need figure out what column we're |
|
|
788 // really looking at. |
|
|
789 |
|
1
|
790 static void |
|
|
791 fixup_column_count (char *s) |
|
|
792 { |
|
|
793 char c; |
|
|
794 while ((c = *s++) != '\0') |
|
|
795 { |
|
|
796 if (c == '\n') |
|
143
|
797 current_input_column = 1; |
|
1
|
798 else |
|
|
799 current_input_column++; |
|
|
800 } |
|
|
801 } |
|
|
802 |
|
767
|
803 // Include these so that we don't have to link to libfl.a. |
|
246
|
804 |
|
1
|
805 #ifdef yywrap |
|
|
806 #undef yywrap |
|
|
807 #endif |
|
246
|
808 static int |
|
1
|
809 yywrap (void) |
|
|
810 { |
|
287
|
811 return 1; |
|
1
|
812 } |
|
|
813 |
|
767
|
814 // Tell us all what the current buffer is. |
|
|
815 |
|
1
|
816 YY_BUFFER_STATE |
|
|
817 current_buffer (void) |
|
|
818 { |
|
|
819 return YY_CURRENT_BUFFER; |
|
|
820 } |
|
|
821 |
|
767
|
822 // Create a new buffer. |
|
|
823 |
|
1
|
824 YY_BUFFER_STATE |
|
|
825 create_buffer (FILE *f) |
|
|
826 { |
|
|
827 return yy_create_buffer (f, YY_BUF_SIZE); |
|
|
828 } |
|
|
829 |
|
767
|
830 // Start reading a new buffer. |
|
|
831 |
|
1
|
832 void |
|
|
833 switch_to_buffer (YY_BUFFER_STATE buf) |
|
|
834 { |
|
|
835 yy_switch_to_buffer (buf); |
|
|
836 } |
|
|
837 |
|
767
|
838 // Delete a buffer. |
|
|
839 |
|
1
|
840 void |
|
|
841 delete_buffer (YY_BUFFER_STATE buf) |
|
|
842 { |
|
|
843 yy_delete_buffer (buf); |
|
|
844 } |
|
|
845 |
|
767
|
846 // Restore a buffer (for unwind-prot). |
|
|
847 |
|
1
|
848 void |
|
|
849 restore_input_buffer (void *buf) |
|
|
850 { |
|
2861
|
851 switch_to_buffer (static_cast<YY_BUFFER_STATE> (buf)); |
|
1
|
852 } |
|
|
853 |
|
767
|
854 // Delete a buffer (for unwind-prot). |
|
|
855 |
|
1
|
856 void |
|
|
857 delete_input_buffer (void *buf) |
|
|
858 { |
|
2861
|
859 delete_buffer (static_cast<YY_BUFFER_STATE> (buf)); |
|
1
|
860 } |
|
|
861 |
|
767
|
862 // Check to see if a character string matches any of the possible line |
|
|
863 // styles for plots. |
|
|
864 |
|
1823
|
865 static string |
|
|
866 plot_style_token (const string& s) |
|
1
|
867 { |
|
1823
|
868 string retval; |
|
|
869 |
|
2804
|
870 static const char *plot_styles[] = |
|
146
|
871 { |
|
925
|
872 "boxes", |
|
924
|
873 "boxerrorbars", |
|
2542
|
874 "boxxyerrorbars", |
|
|
875 "candlesticks", |
|
146
|
876 "dots", |
|
|
877 "errorbars", |
|
2542
|
878 "financebars", |
|
|
879 "fsteps", |
|
|
880 "histeps", |
|
146
|
881 "impulses", |
|
|
882 "lines", |
|
|
883 "linespoints", |
|
|
884 "points", |
|
926
|
885 "steps", |
|
2542
|
886 "vector", |
|
|
887 "xerrorbars", |
|
|
888 "xyerrorbars", |
|
|
889 "yerrorbars", |
|
522
|
890 0, |
|
146
|
891 }; |
|
|
892 |
|
2804
|
893 const char * const *tmp = plot_styles; |
|
522
|
894 while (*tmp) |
|
1
|
895 { |
|
1823
|
896 if (almost_match (*tmp, s.c_str ())) |
|
|
897 { |
|
|
898 retval = *tmp; |
|
|
899 break; |
|
|
900 } |
|
1
|
901 |
|
|
902 tmp++; |
|
|
903 } |
|
|
904 |
|
1823
|
905 return retval; |
|
1
|
906 } |
|
|
907 |
|
767
|
908 // Check to see if a character string matches any one of the plot |
|
941
|
909 // option keywords. Don't match abbreviations for clear, since that's |
|
|
910 // not a gnuplot keyword (users will probably only expect to be able |
|
|
911 // to abbreviate actual gnuplot keywords). |
|
767
|
912 |
|
1
|
913 static int |
|
1823
|
914 is_plot_keyword (const string& s) |
|
1
|
915 { |
|
1823
|
916 const char *t = s.c_str (); |
|
|
917 if (almost_match ("title", t)) |
|
146
|
918 { |
|
|
919 return TITLE; |
|
|
920 } |
|
1823
|
921 else if (almost_match ("using", t)) |
|
146
|
922 { |
|
2857
|
923 lexer_flags.in_plot_using = true; |
|
146
|
924 return USING; |
|
|
925 } |
|
1823
|
926 else if (almost_match ("with", t)) |
|
146
|
927 { |
|
2857
|
928 lexer_flags.in_plot_style = true; |
|
146
|
929 return WITH; |
|
|
930 } |
|
1823
|
931 else if (strcmp ("clear", t) == 0) |
|
883
|
932 { |
|
|
933 return CLEAR; |
|
|
934 } |
|
1
|
935 else |
|
146
|
936 { |
|
|
937 return 0; |
|
|
938 } |
|
1
|
939 } |
|
|
940 |
|
2877
|
941 // Handle keywords. |
|
767
|
942 |
|
1
|
943 static int |
|
1823
|
944 is_keyword (const string& s) |
|
1
|
945 { |
|
1826
|
946 if (lexer_flags.plotting && lexer_flags.in_plot_style) |
|
1
|
947 { |
|
1823
|
948 string sty = plot_style_token (s); |
|
|
949 |
|
|
950 if (! sty.empty ()) |
|
1
|
951 { |
|
2857
|
952 lexer_flags.in_plot_style = false; |
|
143
|
953 yylval.tok_val = new token (sty); |
|
|
954 token_stack.push (yylval.tok_val); |
|
1
|
955 return STYLE; |
|
|
956 } |
|
|
957 } |
|
|
958 |
|
143
|
959 int l = input_line_number; |
|
|
960 int c = current_input_column; |
|
|
961 |
|
1823
|
962 int len = s.length (); |
|
922
|
963 |
|
1823
|
964 const octave_kw *kw = octave_kw_lookup (s.c_str (), len); |
|
191
|
965 |
|
1497
|
966 if (kw) |
|
143
|
967 { |
|
1497
|
968 yylval.tok_val = 0; |
|
|
969 |
|
|
970 switch (kw->kw_id) |
|
|
971 { |
|
|
972 case all_va_args_kw: |
|
|
973 case break_kw: |
|
2764
|
974 case case_kw: |
|
1497
|
975 case catch_kw: |
|
|
976 case continue_kw: |
|
|
977 case else_kw: |
|
|
978 case elseif_kw: |
|
|
979 case global_kw: |
|
2764
|
980 case otherwise_kw: |
|
1497
|
981 case return_kw: |
|
2846
|
982 case static_kw: |
|
1497
|
983 case unwind_protect_cleanup_kw: |
|
|
984 break; |
|
|
985 |
|
|
986 case end_kw: |
|
|
987 yylval.tok_val = new token (token::simple_end, l, c); |
|
|
988 break; |
|
|
989 |
|
|
990 case end_try_catch_kw: |
|
|
991 yylval.tok_val = new token (token::try_catch_end, l, c); |
|
|
992 break; |
|
|
993 |
|
|
994 case end_unwind_protect_kw: |
|
|
995 yylval.tok_val = new token (token::unwind_protect_end, l, c); |
|
|
996 break; |
|
|
997 |
|
|
998 case endfor_kw: |
|
|
999 yylval.tok_val = new token (token::for_end, l, c); |
|
|
1000 break; |
|
|
1001 |
|
|
1002 case endfunction_kw: |
|
|
1003 yylval.tok_val = new token (token::function_end, l, c); |
|
|
1004 break; |
|
|
1005 |
|
|
1006 case endif_kw: |
|
|
1007 yylval.tok_val = new token (token::if_end, l, c); |
|
|
1008 break; |
|
|
1009 |
|
2764
|
1010 case endswitch_kw: |
|
|
1011 yylval.tok_val = new token (token::switch_end, l, c); |
|
|
1012 break; |
|
|
1013 |
|
1497
|
1014 case endwhile_kw: |
|
|
1015 yylval.tok_val = new token (token::while_end, l, c); |
|
|
1016 break; |
|
|
1017 |
|
|
1018 case for_kw: |
|
|
1019 case while_kw: |
|
|
1020 promptflag--; |
|
1826
|
1021 lexer_flags.looping++; |
|
1497
|
1022 break; |
|
|
1023 |
|
|
1024 case if_kw: |
|
|
1025 case try_kw: |
|
2764
|
1026 case switch_kw: |
|
1497
|
1027 case unwind_protect_kw: |
|
|
1028 promptflag--; |
|
|
1029 break; |
|
|
1030 |
|
|
1031 case gplot_kw: |
|
2857
|
1032 lexer_flags.plotting = true; |
|
1497
|
1033 yylval.tok_val = new token (token::two_dee, l, c); |
|
|
1034 break; |
|
|
1035 |
|
|
1036 case gsplot_kw: |
|
2857
|
1037 lexer_flags.plotting = true; |
|
1497
|
1038 yylval.tok_val = new token (token::three_dee, l, c); |
|
|
1039 break; |
|
|
1040 |
|
|
1041 case replot_kw: |
|
2857
|
1042 lexer_flags.plotting = true; |
|
1497
|
1043 yylval.tok_val = new token (token::replot, l, c); |
|
|
1044 break; |
|
|
1045 |
|
|
1046 case function_kw: |
|
1826
|
1047 if (lexer_flags.defining_func) |
|
1497
|
1048 { |
|
|
1049 error ("function keyword invalid within a function body"); |
|
|
1050 |
|
|
1051 if ((reading_fcn_file || reading_script_file) |
|
1755
|
1052 && ! curr_fcn_file_name.empty ()) |
|
1497
|
1053 error ("defining new function near line %d of file `%s.m'", |
|
1755
|
1054 input_line_number, curr_fcn_file_name.c_str ()); |
|
1497
|
1055 else |
|
1755
|
1056 error ("defining new function near line %d", |
|
|
1057 input_line_number); |
|
1497
|
1058 |
|
|
1059 return LEXICAL_ERROR; |
|
|
1060 } |
|
|
1061 else |
|
|
1062 { |
|
2877
|
1063 // Prepare for local symbols. |
|
|
1064 |
|
1497
|
1065 tmp_local_sym_tab = new symbol_table (); |
|
2877
|
1066 |
|
|
1067 promptflag--; |
|
|
1068 |
|
2857
|
1069 lexer_flags.defining_func = true; |
|
2877
|
1070 lexer_flags.parsed_function_name = false; |
|
2857
|
1071 lexer_flags.beginning_of_function = true; |
|
2877
|
1072 |
|
1497
|
1073 if (! (reading_fcn_file || reading_script_file)) |
|
|
1074 input_line_number = 1; |
|
|
1075 } |
|
|
1076 break; |
|
|
1077 |
|
|
1078 default: |
|
|
1079 panic_impossible (); |
|
|
1080 } |
|
|
1081 |
|
|
1082 if (! yylval.tok_val) |
|
|
1083 yylval.tok_val = new token (l, c); |
|
|
1084 |
|
476
|
1085 token_stack.push (yylval.tok_val); |
|
1497
|
1086 |
|
|
1087 return kw->tok; |
|
143
|
1088 } |
|
1
|
1089 |
|
|
1090 return 0; |
|
|
1091 } |
|
|
1092 |
|
767
|
1093 // Try to find an identifier. All binding to global or builtin |
|
|
1094 // variables occurs when expressions are evaluated. |
|
|
1095 |
|
1
|
1096 static symbol_record * |
|
1823
|
1097 lookup_identifier (const string& name) |
|
1
|
1098 { |
|
2856
|
1099 return curr_sym_tab->lookup (name, true); |
|
1
|
1100 } |
|
|
1101 |
|
2702
|
1102 static bool |
|
|
1103 is_variable (const string& name) |
|
|
1104 { |
|
2856
|
1105 symbol_record *sr = curr_sym_tab->lookup (name); |
|
2702
|
1106 |
|
|
1107 return sr && sr->is_variable (); |
|
|
1108 } |
|
|
1109 |
|
|
1110 static void |
|
|
1111 force_local_variable (const string& name) |
|
|
1112 { |
|
2856
|
1113 symbol_record *sr = curr_sym_tab->lookup (name, true); |
|
2702
|
1114 |
|
|
1115 if (sr) |
|
|
1116 sr->define (octave_value ()); |
|
|
1117 } |
|
|
1118 |
|
1019
|
1119 // Grab the help text from an function file. Always overwrites the |
|
|
1120 // current contents of help_buf. |
|
767
|
1121 |
|
2300
|
1122 // XXX FIXME XXX -- gobble_leading_white_space() in variables.cc |
|
|
1123 // duplicates some of this code! |
|
|
1124 |
|
1
|
1125 static void |
|
|
1126 grab_help_text (void) |
|
|
1127 { |
|
1755
|
1128 help_buf.resize (0); |
|
1019
|
1129 |
|
2300
|
1130 bool begin_comment = true; |
|
|
1131 bool in_comment = true; |
|
1019
|
1132 int c = 0; |
|
1
|
1133 |
|
1019
|
1134 while ((c = yyinput ()) != EOF) |
|
|
1135 { |
|
2300
|
1136 if (begin_comment) |
|
|
1137 { |
|
|
1138 if (c == '%' || c == '#') |
|
|
1139 continue; |
|
|
1140 else |
|
|
1141 begin_comment = false; |
|
|
1142 } |
|
|
1143 |
|
1019
|
1144 if (in_comment) |
|
1
|
1145 { |
|
1755
|
1146 help_buf += (char) c; |
|
|
1147 |
|
1019
|
1148 if (c == '\n') |
|
2300
|
1149 in_comment = false; |
|
1019
|
1150 } |
|
|
1151 else |
|
|
1152 { |
|
|
1153 switch (c) |
|
991
|
1154 { |
|
1019
|
1155 case '%': |
|
|
1156 case '#': |
|
2300
|
1157 in_comment = true; |
|
|
1158 begin_comment = true; |
|
1019
|
1159 break; |
|
777
|
1160 |
|
1019
|
1161 case ' ': |
|
|
1162 case '\t': |
|
|
1163 break; |
|
777
|
1164 |
|
1019
|
1165 default: |
|
|
1166 goto done; |
|
1
|
1167 } |
|
|
1168 } |
|
1019
|
1169 } |
|
991
|
1170 |
|
1019
|
1171 done: |
|
991
|
1172 |
|
1019
|
1173 if (c) |
|
|
1174 yyunput (c, yytext); |
|
1
|
1175 } |
|
|
1176 |
|
767
|
1177 // Return 1 if the given character matches any character in the given |
|
|
1178 // string. |
|
|
1179 |
|
2857
|
1180 static bool |
|
2804
|
1181 match_any (char c, const char *s) |
|
1
|
1182 { |
|
|
1183 char tmp; |
|
|
1184 while ((tmp = *s++) != '\0') |
|
|
1185 { |
|
|
1186 if (c == tmp) |
|
2857
|
1187 return true; |
|
1
|
1188 } |
|
2857
|
1189 return false; |
|
1
|
1190 } |
|
|
1191 |
|
767
|
1192 // Given information about the spacing surrounding an operator, |
|
|
1193 // return 1 if it looks like it should be treated as a binary |
|
|
1194 // operator. For example, |
|
|
1195 // |
|
|
1196 // [ 1 + 2 ] or [ 1+ 2] or [ 1+2 ] ==> binary |
|
|
1197 |
|
2857
|
1198 static bool |
|
1
|
1199 looks_like_bin_op (int spc_prev, int spc_next) |
|
|
1200 { |
|
608
|
1201 return ((spc_prev && spc_next) || ! spc_prev); |
|
1
|
1202 } |
|
|
1203 |
|
767
|
1204 // Try to determine if the next token should be treated as a postfix |
|
|
1205 // unary operator. This is ugly, but it seems to do the right thing. |
|
|
1206 |
|
2857
|
1207 static bool |
|
1
|
1208 next_token_is_postfix_unary_op (int spc_prev, char *yytext) |
|
|
1209 { |
|
2857
|
1210 bool un_op = false; |
|
1
|
1211 |
|
|
1212 int c0 = yyinput (); |
|
|
1213 int c1 = yyinput (); |
|
|
1214 |
|
|
1215 yyunput (c1, yytext); |
|
|
1216 yyunput (c0, yytext); |
|
|
1217 |
|
|
1218 int transpose = (c0 == '.' && c1 == '\''); |
|
|
1219 int hermitian = (c0 == '\''); |
|
|
1220 |
|
|
1221 un_op = (transpose || (hermitian && ! spc_prev)); |
|
|
1222 |
|
|
1223 return un_op; |
|
|
1224 } |
|
|
1225 |
|
767
|
1226 // Try to determine if the next token should be treated as a binary |
|
|
1227 // operator. This is even uglier, but it also seems to do the right |
|
1276
|
1228 // thing. Note that it is only necessary to check the spacing for `+' |
|
|
1229 // and `-', since those are the only tokens that can appear as unary |
|
|
1230 // ops too. |
|
1521
|
1231 // |
|
|
1232 // Note that this never returns true for `.', even though it can be a |
|
|
1233 // binary operator (the structure reference thing). The only time |
|
|
1234 // this appears to matter is for things like |
|
|
1235 // |
|
|
1236 // [ a . b ] |
|
|
1237 // |
|
|
1238 // which probably doesn't occur that often, can be worked around by |
|
|
1239 // eliminating the whitespace, putting the expression in parentheses, |
|
|
1240 // or using `whitespace_in_literal_matrix = "ignored"', so I think it |
|
|
1241 // is an acceptable change. It would be quite a bit harder to `fix' |
|
|
1242 // this. (Well, maybe not. the best fix would be to do away with the |
|
|
1243 // specialness of whitespace inside of `[ ... ]'). |
|
1554
|
1244 // |
|
|
1245 // However, we still do check for `.+', `.*', etc. |
|
767
|
1246 |
|
2857
|
1247 static bool |
|
1
|
1248 next_token_is_bin_op (int spc_prev, char *yytext) |
|
|
1249 { |
|
2857
|
1250 bool bin_op = false; |
|
1
|
1251 |
|
|
1252 int c0 = yyinput (); |
|
|
1253 |
|
|
1254 switch (c0) |
|
|
1255 { |
|
777
|
1256 case '+': |
|
|
1257 case '-': |
|
1276
|
1258 { |
|
|
1259 int c1 = yyinput (); |
|
|
1260 yyunput (c1, yytext); |
|
|
1261 int spc_next = (c1 == ' ' || c1 == '\t'); |
|
|
1262 bin_op = looks_like_bin_op (spc_prev, spc_next); |
|
|
1263 } |
|
|
1264 break; |
|
|
1265 |
|
1554
|
1266 case '.': |
|
|
1267 { |
|
|
1268 int c1 = yyinput (); |
|
|
1269 yyunput (c1, yytext); |
|
|
1270 bin_op = match_any (c1, "+-*/\\^"); |
|
|
1271 } |
|
|
1272 break; |
|
|
1273 |
|
777
|
1274 case '/': |
|
|
1275 case ':': |
|
|
1276 case '\\': |
|
|
1277 case '^': |
|
1
|
1278 case '&': |
|
|
1279 case '*': |
|
|
1280 case '|': |
|
|
1281 case '<': |
|
|
1282 case '>': |
|
777
|
1283 case '~': |
|
|
1284 case '!': |
|
|
1285 case '=': |
|
2857
|
1286 bin_op = true; |
|
1
|
1287 break; |
|
|
1288 |
|
|
1289 default: |
|
1276
|
1290 break; |
|
1
|
1291 } |
|
|
1292 |
|
|
1293 yyunput (c0, yytext); |
|
|
1294 |
|
|
1295 return bin_op; |
|
|
1296 } |
|
|
1297 |
|
767
|
1298 // Used to delete trailing white space from tokens. |
|
|
1299 |
|
1823
|
1300 static string |
|
1
|
1301 strip_trailing_whitespace (char *s) |
|
|
1302 { |
|
1823
|
1303 string retval = s; |
|
1
|
1304 |
|
1823
|
1305 size_t pos = retval.find_first_of (" \t"); |
|
1
|
1306 |
|
1823
|
1307 if (pos != NPOS) |
|
|
1308 retval.resize (pos); |
|
1
|
1309 |
|
|
1310 return retval; |
|
|
1311 } |
|
|
1312 |
|
1001
|
1313 // Discard whitespace, including comments and continuations. |
|
1088
|
1314 // |
|
|
1315 // Return value is logical OR of the following values: |
|
|
1316 // |
|
1826
|
1317 // ATE_NOTHING : no spaces to eat |
|
1088
|
1318 // ATE_SPACE_OR_TAB : space or tab in input |
|
|
1319 // ATE_NEWLINE : bare new line in input |
|
1001
|
1320 |
|
1826
|
1321 static yum_yum |
|
975
|
1322 eat_whitespace (void) |
|
|
1323 { |
|
1826
|
1324 yum_yum retval = ATE_NOTHING; |
|
2857
|
1325 bool in_comment = false; |
|
975
|
1326 int c; |
|
|
1327 while ((c = yyinput ()) != EOF) |
|
|
1328 { |
|
|
1329 current_input_column++; |
|
|
1330 |
|
|
1331 switch (c) |
|
|
1332 { |
|
|
1333 case ' ': |
|
|
1334 case '\t': |
|
1088
|
1335 retval |= ATE_SPACE_OR_TAB; |
|
975
|
1336 break; |
|
|
1337 |
|
|
1338 case '\n': |
|
1088
|
1339 retval |= ATE_NEWLINE; |
|
2857
|
1340 in_comment = false; |
|
975
|
1341 current_input_column = 0; |
|
|
1342 break; |
|
|
1343 |
|
|
1344 case '#': |
|
|
1345 case '%': |
|
2857
|
1346 in_comment = true; |
|
975
|
1347 break; |
|
|
1348 |
|
1001
|
1349 case '.': |
|
|
1350 if (in_comment) |
|
|
1351 break; |
|
|
1352 else |
|
|
1353 { |
|
|
1354 if (have_ellipsis_continuation ()) |
|
|
1355 break; |
|
|
1356 else |
|
|
1357 goto done; |
|
|
1358 } |
|
|
1359 |
|
|
1360 case '\\': |
|
|
1361 if (in_comment) |
|
|
1362 break; |
|
|
1363 else |
|
|
1364 { |
|
|
1365 if (have_continuation ()) |
|
|
1366 break; |
|
|
1367 else |
|
|
1368 goto done; |
|
|
1369 } |
|
|
1370 |
|
975
|
1371 default: |
|
|
1372 if (in_comment) |
|
|
1373 break; |
|
|
1374 else |
|
|
1375 goto done; |
|
|
1376 } |
|
|
1377 } |
|
|
1378 |
|
|
1379 done: |
|
|
1380 yyunput (c, yytext); |
|
1082
|
1381 current_input_column--; |
|
1001
|
1382 return retval; |
|
975
|
1383 } |
|
|
1384 |
|
|
1385 static void |
|
972
|
1386 handle_number (char *yytext) |
|
|
1387 { |
|
2621
|
1388 char *tmp = strsave (yytext); |
|
|
1389 |
|
|
1390 char *idx = strpbrk (tmp, "Dd"); |
|
|
1391 |
|
|
1392 if (idx) |
|
|
1393 *idx = 'e'; |
|
|
1394 |
|
972
|
1395 double value; |
|
2621
|
1396 int nread = sscanf (tmp, "%lf", &value); |
|
|
1397 |
|
|
1398 delete [] tmp; |
|
972
|
1399 |
|
1826
|
1400 // If yytext doesn't contain a valid number, we are in deep doo doo. |
|
985
|
1401 |
|
972
|
1402 assert (nread == 1); |
|
|
1403 |
|
1826
|
1404 lexer_flags.quote_is_transpose = 1; |
|
|
1405 lexer_flags.cant_be_identifier = 1; |
|
|
1406 lexer_flags.convert_spaces_to_comma = 1; |
|
972
|
1407 |
|
1826
|
1408 if (lexer_flags.plotting && ! lexer_flags.in_plot_range) |
|
|
1409 lexer_flags.past_plot_range = 1; |
|
972
|
1410 |
|
|
1411 yylval.tok_val = new token (value, yytext, input_line_number, |
|
|
1412 current_input_column); |
|
|
1413 |
|
|
1414 token_stack.push (yylval.tok_val); |
|
|
1415 |
|
|
1416 current_input_column += yyleng; |
|
|
1417 |
|
|
1418 do_comma_insert_check (); |
|
|
1419 } |
|
|
1420 |
|
1001
|
1421 // We have seen a backslash and need to find out if it should be |
|
|
1422 // treated as a continuation character. If so, this eats it, up to |
|
|
1423 // and including the new line character. |
|
|
1424 // |
|
973
|
1425 // Match whitespace only, followed by a comment character or newline. |
|
|
1426 // Once a comment character is found, discard all input until newline. |
|
|
1427 // If non-whitespace characters are found before comment |
|
|
1428 // characters, return 0. Otherwise, return 1. |
|
|
1429 |
|
2857
|
1430 static bool |
|
1091
|
1431 have_continuation (int trailing_comments_ok) |
|
973
|
1432 { |
|
|
1433 ostrstream buf; |
|
|
1434 |
|
2857
|
1435 bool in_comment = false; |
|
973
|
1436 char c; |
|
|
1437 while ((c = yyinput ()) != EOF) |
|
|
1438 { |
|
|
1439 buf << (char) c; |
|
|
1440 |
|
|
1441 switch (c) |
|
|
1442 { |
|
|
1443 case ' ': |
|
|
1444 case '\t': |
|
|
1445 break; |
|
|
1446 |
|
|
1447 case '%': |
|
|
1448 case '#': |
|
1091
|
1449 if (trailing_comments_ok) |
|
2857
|
1450 in_comment = true; |
|
1091
|
1451 else |
|
|
1452 goto cleanup; |
|
973
|
1453 break; |
|
|
1454 |
|
|
1455 case '\n': |
|
975
|
1456 current_input_column = 0; |
|
1001
|
1457 promptflag--; |
|
2857
|
1458 return true; |
|
973
|
1459 |
|
|
1460 default: |
|
1091
|
1461 if (! in_comment) |
|
|
1462 goto cleanup; |
|
|
1463 break; |
|
973
|
1464 } |
|
|
1465 } |
|
|
1466 |
|
|
1467 yyunput (c, yytext); |
|
2857
|
1468 return false; |
|
973
|
1469 |
|
1091
|
1470 cleanup: |
|
|
1471 buf << ends; |
|
|
1472 char *s = buf.str (); |
|
|
1473 if (s) |
|
|
1474 { |
|
|
1475 int len = strlen (s); |
|
|
1476 while (len--) |
|
|
1477 yyunput (s[len], yytext); |
|
|
1478 } |
|
|
1479 delete [] s; |
|
2857
|
1480 return false; |
|
973
|
1481 } |
|
|
1482 |
|
1001
|
1483 // We have seen a `.' and need to see if it is the start of a |
|
|
1484 // continuation. If so, this eats it, up to and including the new |
|
|
1485 // line character. |
|
|
1486 |
|
2857
|
1487 static bool |
|
1091
|
1488 have_ellipsis_continuation (int trailing_comments_ok) |
|
973
|
1489 { |
|
|
1490 char c1 = yyinput (); |
|
|
1491 if (c1 == '.') |
|
|
1492 { |
|
|
1493 char c2 = yyinput (); |
|
1091
|
1494 if (c2 == '.' && have_continuation (trailing_comments_ok)) |
|
2857
|
1495 return true; |
|
973
|
1496 else |
|
|
1497 { |
|
|
1498 yyunput (c2, yytext); |
|
|
1499 yyunput (c1, yytext); |
|
|
1500 } |
|
|
1501 } |
|
|
1502 else |
|
|
1503 yyunput (c1, yytext); |
|
|
1504 |
|
2857
|
1505 return false; |
|
973
|
1506 } |
|
|
1507 |
|
1001
|
1508 // See if we have a continuation line. If so, eat it and the leading |
|
|
1509 // whitespace on the next line. |
|
1088
|
1510 // |
|
|
1511 // Return value is the same as described for eat_whitespace(). |
|
1001
|
1512 |
|
1826
|
1513 static yum_yum |
|
1001
|
1514 eat_continuation (void) |
|
|
1515 { |
|
1826
|
1516 int retval = ATE_NOTHING; |
|
1001
|
1517 int c = yyinput (); |
|
|
1518 if ((c == '.' && have_ellipsis_continuation ()) |
|
|
1519 || (c == '\\' && have_continuation ())) |
|
|
1520 retval = eat_whitespace (); |
|
|
1521 else |
|
|
1522 yyunput (c, yytext); |
|
|
1523 |
|
|
1524 return retval; |
|
|
1525 } |
|
|
1526 |
|
973
|
1527 static int |
|
975
|
1528 handle_string (char delim, int text_style) |
|
973
|
1529 { |
|
|
1530 ostrstream buf; |
|
|
1531 |
|
|
1532 int c; |
|
1031
|
1533 int escape_pending = 0; |
|
973
|
1534 |
|
|
1535 while ((c = yyinput ()) != EOF) |
|
|
1536 { |
|
|
1537 current_input_column++; |
|
|
1538 |
|
|
1539 if (c == '\\') |
|
|
1540 { |
|
1053
|
1541 if (escape_pending) |
|
|
1542 { |
|
|
1543 buf << (char) c; |
|
|
1544 escape_pending = 0; |
|
|
1545 } |
|
|
1546 else |
|
|
1547 { |
|
1091
|
1548 if (have_continuation (0)) |
|
1053
|
1549 escape_pending = 0; |
|
|
1550 else |
|
|
1551 { |
|
|
1552 buf << (char) c; |
|
|
1553 escape_pending = 1; |
|
|
1554 } |
|
|
1555 } |
|
1031
|
1556 continue; |
|
973
|
1557 } |
|
|
1558 else if (c == '.') |
|
|
1559 { |
|
1091
|
1560 if (! have_ellipsis_continuation (0)) |
|
973
|
1561 buf << (char) c; |
|
|
1562 } |
|
|
1563 else if (c == '\n') |
|
|
1564 { |
|
1053
|
1565 error ("unterminated string constant"); |
|
973
|
1566 break; |
|
|
1567 } |
|
|
1568 else if (c == delim) |
|
|
1569 { |
|
1031
|
1570 if (escape_pending) |
|
973
|
1571 buf << (char) c; |
|
|
1572 else |
|
|
1573 { |
|
|
1574 c = yyinput (); |
|
|
1575 if (c == delim) |
|
|
1576 buf << (char) c; |
|
|
1577 else |
|
|
1578 { |
|
|
1579 yyunput (c, yytext); |
|
|
1580 buf << ends; |
|
|
1581 char *tok = buf.str (); |
|
|
1582 do_string_escapes (tok); |
|
975
|
1583 |
|
1826
|
1584 if (text_style && lexer_flags.doing_set) |
|
975
|
1585 { |
|
|
1586 if (tok) |
|
|
1587 { |
|
|
1588 int len = strlen (tok) + 3; |
|
|
1589 char *tmp = tok; |
|
|
1590 tok = new char [len]; |
|
|
1591 tok[0] = delim; |
|
|
1592 strcpy (tok+1, tmp); |
|
|
1593 tok[len-2] = delim; |
|
|
1594 tok[len-1] = '\0'; |
|
|
1595 delete [] tmp; |
|
|
1596 } |
|
|
1597 } |
|
|
1598 else |
|
|
1599 { |
|
2857
|
1600 lexer_flags.quote_is_transpose = true; |
|
|
1601 lexer_flags.cant_be_identifier = true; |
|
|
1602 lexer_flags.convert_spaces_to_comma = true; |
|
975
|
1603 } |
|
|
1604 |
|
973
|
1605 yylval.tok_val = new token (tok); |
|
|
1606 delete [] tok; |
|
|
1607 token_stack.push (yylval.tok_val); |
|
|
1608 return TEXT; |
|
|
1609 } |
|
|
1610 } |
|
|
1611 } |
|
|
1612 else |
|
|
1613 { |
|
|
1614 buf << (char) c; |
|
|
1615 } |
|
|
1616 |
|
1031
|
1617 escape_pending = 0; |
|
973
|
1618 } |
|
|
1619 |
|
|
1620 return LEXICAL_ERROR; |
|
|
1621 } |
|
|
1622 |
|
971
|
1623 static int |
|
1001
|
1624 handle_close_brace (int spc_gobbled) |
|
971
|
1625 { |
|
1826
|
1626 if (! nesting_level.none ()) |
|
971
|
1627 { |
|
1826
|
1628 nesting_level.remove (); |
|
|
1629 lexer_flags.braceflag--; |
|
971
|
1630 } |
|
|
1631 |
|
1826
|
1632 if (lexer_flags.braceflag == 0) |
|
1001
|
1633 BEGIN 0; |
|
|
1634 |
|
971
|
1635 int c1 = yyinput (); |
|
|
1636 if (c1 == '=') |
|
|
1637 { |
|
2857
|
1638 lexer_flags.quote_is_transpose = false; |
|
|
1639 lexer_flags.cant_be_identifier = false; |
|
|
1640 lexer_flags.convert_spaces_to_comma = true; |
|
971
|
1641 |
|
|
1642 int c2 = yyinput (); |
|
|
1643 unput (c2); |
|
|
1644 unput (c1); |
|
|
1645 |
|
1826
|
1646 if (c2 != '=' && lexer_flags.maybe_screwed_again) |
|
971
|
1647 return SCREW_TWO; |
|
|
1648 else |
|
|
1649 return ']'; |
|
|
1650 } |
|
|
1651 else |
|
|
1652 { |
|
|
1653 unput (c1); |
|
|
1654 |
|
2167
|
1655 if (lexer_flags.braceflag && Vwhitespace_in_literal_matrix != 2) |
|
971
|
1656 { |
|
1001
|
1657 int bin_op = next_token_is_bin_op (spc_gobbled, yytext); |
|
971
|
1658 int postfix_un_op = next_token_is_postfix_unary_op |
|
1001
|
1659 (spc_gobbled, yytext); |
|
971
|
1660 |
|
|
1661 int other_op = match_any (c1, ",;\n]"); |
|
|
1662 |
|
1826
|
1663 if (! (postfix_un_op || bin_op || other_op) |
|
|
1664 && nesting_level.is_brace () |
|
|
1665 && lexer_flags.convert_spaces_to_comma) |
|
971
|
1666 { |
|
|
1667 unput (','); |
|
|
1668 return ']'; |
|
|
1669 } |
|
|
1670 } |
|
|
1671 } |
|
|
1672 |
|
2857
|
1673 lexer_flags.quote_is_transpose = true; |
|
|
1674 lexer_flags.cant_be_identifier = false; |
|
|
1675 lexer_flags.convert_spaces_to_comma = true; |
|
971
|
1676 return ']'; |
|
|
1677 } |
|
|
1678 |
|
1072
|
1679 static void |
|
|
1680 maybe_unput_comma (int spc_gobbled) |
|
|
1681 { |
|
2167
|
1682 if (Vwhitespace_in_literal_matrix != 2 |
|
1826
|
1683 && nesting_level.is_brace ()) |
|
1072
|
1684 { |
|
|
1685 int bin_op = next_token_is_bin_op (spc_gobbled, yytext); |
|
|
1686 |
|
|
1687 int postfix_un_op = next_token_is_postfix_unary_op (spc_gobbled, |
|
|
1688 yytext); |
|
|
1689 |
|
|
1690 int c1 = yyinput (); |
|
|
1691 int c2 = yyinput (); |
|
|
1692 unput (c2); |
|
|
1693 unput (c1); |
|
|
1694 int sep_op = match_any (c1, ",;\n]"); |
|
|
1695 int dot_op = (c1 == '.' |
|
|
1696 && (isalpha (c2) || isspace (c2) || c2 == '_')); |
|
|
1697 int index_op = (c1 == '(' |
|
2167
|
1698 && (Vwhitespace_in_literal_matrix == 0 |
|
1072
|
1699 || ! spc_gobbled)); |
|
|
1700 |
|
|
1701 if (! (postfix_un_op || bin_op || sep_op || dot_op || index_op)) |
|
|
1702 unput (','); |
|
|
1703 } |
|
|
1704 } |
|
|
1705 |
|
767
|
1706 // Figure out exactly what kind of token to return when we have seen |
|
|
1707 // an identifier. Handles keywords. |
|
|
1708 |
|
146
|
1709 static int |
|
1823
|
1710 handle_identifier (const string& tok, int spc_gobbled) |
|
146
|
1711 { |
|
1826
|
1712 // It is almost always an error for an identifier to be followed |
|
|
1713 // directly by another identifier. Special cases are handled |
|
|
1714 // below. |
|
883
|
1715 |
|
2857
|
1716 lexer_flags.cant_be_identifier = true; |
|
883
|
1717 |
|
1826
|
1718 // If we are expecting a structure element, we just want to return |
|
|
1719 // TEXT_ID, which is a string that is also a valid identifier. But |
|
|
1720 // first, we have to decide whether to insert a comma. |
|
747
|
1721 |
|
1826
|
1722 if (lexer_flags.looking_at_indirect_ref) |
|
1072
|
1723 { |
|
|
1724 maybe_unput_comma (spc_gobbled); |
|
2819
|
1725 |
|
|
1726 yylval.tok_val = new token (tok, input_line_number, |
|
|
1727 current_input_column); |
|
|
1728 |
|
|
1729 token_stack.push (yylval.tok_val); |
|
|
1730 |
|
2857
|
1731 lexer_flags.cant_be_identifier = false; |
|
|
1732 lexer_flags.quote_is_transpose = true; |
|
|
1733 lexer_flags.convert_spaces_to_comma = true; |
|
2819
|
1734 |
|
|
1735 current_input_column += yyleng; |
|
|
1736 |
|
|
1737 return TEXT_ID; |
|
1072
|
1738 } |
|
747
|
1739 |
|
1826
|
1740 // If we have a regular keyword, or a plot STYLE, return it. |
|
|
1741 // Keywords can be followed by identifiers (TOK_RETURN handles |
|
|
1742 // that). |
|
146
|
1743 |
|
|
1744 int kw_token = is_keyword (tok); |
|
|
1745 if (kw_token) |
|
|
1746 { |
|
|
1747 if (kw_token == STYLE) |
|
|
1748 { |
|
1060
|
1749 current_input_column += yyleng; |
|
2857
|
1750 lexer_flags.quote_is_transpose = false; |
|
|
1751 lexer_flags.convert_spaces_to_comma = true; |
|
146
|
1752 return kw_token; |
|
|
1753 } |
|
|
1754 else |
|
|
1755 TOK_RETURN (kw_token); |
|
|
1756 } |
|
|
1757 |
|
1826
|
1758 // See if we have a plot keyword (title, using, with, or clear). |
|
146
|
1759 |
|
1826
|
1760 if (lexer_flags.plotting) |
|
941
|
1761 { |
|
1826
|
1762 // Yes, we really do need both of these plot_range variables. |
|
|
1763 // One is used to mark when we are past all possiblity of a plot |
|
|
1764 // range, the other is used to mark when we are actually between |
|
|
1765 // the square brackets that surround the range. |
|
146
|
1766 |
|
1826
|
1767 if (! lexer_flags.in_plot_range) |
|
2857
|
1768 lexer_flags.past_plot_range = true; |
|
941
|
1769 |
|
1273
|
1770 // Option keywords can't appear in parentheses or braces. |
|
|
1771 |
|
|
1772 int plot_option_kw = 0; |
|
1826
|
1773 if (nesting_level.none ()) |
|
1273
|
1774 plot_option_kw = is_plot_keyword (tok); |
|
941
|
1775 |
|
1826
|
1776 if (lexer_flags.cant_be_identifier && plot_option_kw) |
|
941
|
1777 TOK_RETURN (plot_option_kw); |
|
|
1778 } |
|
146
|
1779 |
|
1001
|
1780 int c = yyinput (); |
|
|
1781 yyunput (c, yytext); |
|
2702
|
1782 bool next_tok_is_eq = (c == '='); |
|
|
1783 bool next_tok_is_paren = (c == '('); |
|
1001
|
1784 |
|
1826
|
1785 // Make sure we put the return values of a function in the symbol |
|
|
1786 // table that is local to the function. |
|
146
|
1787 |
|
2877
|
1788 // If we are defining a function and we have not seen the function |
|
|
1789 // name yet and the next token is `=', then this identifier must be |
|
|
1790 // the only return value for the function and it belongs in the |
|
|
1791 // local symbol table. |
|
|
1792 |
|
1826
|
1793 if (next_tok_is_eq |
|
2877
|
1794 && lexer_flags.defining_func |
|
|
1795 && ! lexer_flags.parsed_function_name) |
|
146
|
1796 curr_sym_tab = tmp_local_sym_tab; |
|
|
1797 |
|
2702
|
1798 // Kluge alert. |
|
|
1799 // |
|
|
1800 // If we are looking at a text style function, set up to gobble its |
|
2745
|
1801 // arguments. |
|
|
1802 // |
|
|
1803 // If the following token is `=', or if we are parsing a function |
|
|
1804 // return list or function parameter list, force the symbol to be |
|
2702
|
1805 // inserted as a variable in the current symbol table. |
|
|
1806 |
|
|
1807 if (is_text_function_name (tok) && ! is_variable (tok)) |
|
|
1808 { |
|
2745
|
1809 if (next_tok_is_eq |
|
|
1810 || lexer_flags.looking_at_return_list |
|
|
1811 || lexer_flags.looking_at_parameter_list) |
|
|
1812 { |
|
|
1813 force_local_variable (tok); |
|
|
1814 } |
|
2702
|
1815 else if (! next_tok_is_paren) |
|
|
1816 { |
|
|
1817 if (tok == "gset") |
|
2857
|
1818 lexer_flags.doing_set = true; |
|
2702
|
1819 |
|
|
1820 BEGIN TEXT_FCN; |
|
|
1821 } |
|
|
1822 } |
|
|
1823 |
|
1826
|
1824 // Find the token in the symbol table. |
|
146
|
1825 |
|
|
1826 yylval.tok_val = new token (lookup_identifier (tok), |
|
|
1827 input_line_number, |
|
|
1828 current_input_column); |
|
|
1829 |
|
|
1830 token_stack.push (yylval.tok_val); |
|
|
1831 |
|
1826
|
1832 // After seeing an identifer, it is ok to convert spaces to a comma |
|
|
1833 // (if needed). |
|
146
|
1834 |
|
2857
|
1835 lexer_flags.convert_spaces_to_comma = true; |
|
146
|
1836 |
|
2877
|
1837 if (! next_tok_is_eq) |
|
|
1838 { |
|
|
1839 lexer_flags.quote_is_transpose = true; |
|
146
|
1840 |
|
2877
|
1841 do_comma_insert_check (); |
|
|
1842 |
|
|
1843 maybe_unput_comma (spc_gobbled); |
|
146
|
1844 } |
|
|
1845 |
|
2877
|
1846 current_input_column += yyleng; |
|
146
|
1847 |
|
|
1848 return NAME; |
|
|
1849 } |
|
|
1850 |
|
767
|
1851 // Print a warning if a function file that defines a function has |
|
|
1852 // anything other than comments and whitespace following the END token |
|
|
1853 // that matches the FUNCTION statement. |
|
|
1854 |
|
1
|
1855 void |
|
|
1856 check_for_garbage_after_fcn_def (void) |
|
|
1857 { |
|
1826
|
1858 // By making a newline be the next character to be read, we will |
|
|
1859 // force the parser to return after reading the function. Calling |
|
|
1860 // yyunput with EOF seems not to work... |
|
1
|
1861 |
|
2857
|
1862 bool in_comment = false; |
|
1
|
1863 int lineno = input_line_number; |
|
|
1864 int c; |
|
|
1865 while ((c = yyinput ()) != EOF) |
|
|
1866 { |
|
|
1867 switch (c) |
|
|
1868 { |
|
|
1869 case ' ': |
|
|
1870 case '\t': |
|
|
1871 case ';': |
|
|
1872 case ',': |
|
|
1873 break; |
|
777
|
1874 |
|
1
|
1875 case '\n': |
|
|
1876 if (in_comment) |
|
2857
|
1877 in_comment = false; |
|
1
|
1878 break; |
|
777
|
1879 |
|
1
|
1880 case '%': |
|
|
1881 case '#': |
|
2857
|
1882 in_comment = true; |
|
1
|
1883 break; |
|
777
|
1884 |
|
1
|
1885 default: |
|
|
1886 if (in_comment) |
|
|
1887 break; |
|
|
1888 else |
|
|
1889 { |
|
|
1890 warning ("ignoring trailing garbage after end of function\n\ |
|
1755
|
1891 near line %d of file `%s.m'", lineno, curr_fcn_file_name.c_str ()); |
|
1
|
1892 |
|
|
1893 yyunput ('\n', yytext); |
|
|
1894 return; |
|
|
1895 } |
|
|
1896 } |
|
|
1897 } |
|
|
1898 yyunput ('\n', yytext); |
|
|
1899 } |
|
|
1900 |
|
1826
|
1901 void |
|
|
1902 lexical_feedback::init (void) |
|
|
1903 { |
|
|
1904 // Not initially defining a matrix list. |
|
|
1905 braceflag = 0; |
|
|
1906 |
|
|
1907 // Not initially inside a loop or if statement. |
|
|
1908 looping = 0; |
|
|
1909 |
|
2857
|
1910 // Not initially defining a function. |
|
|
1911 beginning_of_function = false; |
|
|
1912 defining_func = false; |
|
2877
|
1913 parsed_function_name = false; |
|
2857
|
1914 |
|
|
1915 // Not parsing a function return or parameter list. |
|
|
1916 looking_at_return_list = false; |
|
|
1917 looking_at_parameter_list = false; |
|
|
1918 |
|
|
1919 // Next token can be identifier. |
|
|
1920 cant_be_identifier = false; |
|
|
1921 |
|
|
1922 // No need to do comma insert or convert spaces to comma at |
|
|
1923 // beginning of input. |
|
|
1924 convert_spaces_to_comma = true; |
|
|
1925 do_comma_insert = false; |
|
|
1926 |
|
|
1927 // Not initially doing any plotting or setting of plot attributes. |
|
|
1928 doing_set = false; |
|
|
1929 in_plot_range = false; |
|
|
1930 in_plot_style = false; |
|
|
1931 in_plot_using = false; |
|
|
1932 past_plot_range = false; |
|
|
1933 plotting = false; |
|
|
1934 |
|
1826
|
1935 // Not initially looking at indirect references. |
|
2857
|
1936 looking_at_indirect_ref = false; |
|
1826
|
1937 |
|
|
1938 // Not initially screwed by `function [...] = f (...)' syntax. |
|
|
1939 maybe_screwed_again = 0; |
|
1
|
1940 |
|
1826
|
1941 // Quote marks strings intially. |
|
2857
|
1942 quote_is_transpose = false; |
|
1826
|
1943 } |
|
|
1944 |
|
2167
|
1945 int |
|
|
1946 whitespace_in_literal_matrix (void) |
|
|
1947 { |
|
|
1948 int pref = 0; |
|
|
1949 string val = builtin_string_variable ("whitespace_in_literal_matrix"); |
|
|
1950 if (! val.empty ()) |
|
|
1951 { |
|
|
1952 if (val.compare ("ignore", 0, 6) == 0) |
|
|
1953 pref = 2; |
|
|
1954 else if (val.compare ("traditional", 0, 11) == 0) |
|
|
1955 pref = 1; |
|
|
1956 } |
|
|
1957 Vwhitespace_in_literal_matrix = pref; |
|
|
1958 return 0; |
|
|
1959 } |
|
|
1960 |
|
|
1961 void |
|
|
1962 symbols_of_lex (void) |
|
|
1963 { |
|
|
1964 DEFVAR (whitespace_in_literal_matrix, "", 0, whitespace_in_literal_matrix, |
|
|
1965 "control auto-insertion of commas and semicolons in literal matrices"); |
|
|
1966 } |
|
|
1967 |
|
1994
|
1968 /* |
|
|
1969 ;;; Local Variables: *** |
|
|
1970 ;;; mode: C++ *** |
|
|
1971 ;;; End: *** |
|
|
1972 */ |
