summaryrefslogtreecommitdiffstats
path: root/src/glsl/glsl_lexer.ll
blob: e59f93e10efc2de1746f1cceb7bccd5cabab6af0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
%{
/*
 * Copyright © 2008, 2009 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */
#include <ctype.h>
#include <limits.h>
#include "util/strtod.h"
#include "ast.h"
#include "glsl_parser_extras.h"
#include "glsl_parser.h"

static int classify_identifier(struct _mesa_glsl_parse_state *, const char *);

#ifdef _MSC_VER
#define YY_NO_UNISTD_H
#endif

#define YY_USER_ACTION						\
   do {								\
      yylloc->first_column = yycolumn + 1;			\
      yylloc->first_line = yylloc->last_line = yylineno + 1;	\
      yycolumn += yyleng;					\
      yylloc->last_column = yycolumn + 1;			\
   } while(0);

#define YY_USER_INIT yylineno = 0; yycolumn = 0; yylloc->source = 0;

/* A macro for handling reserved words and keywords across language versions.
 *
 * Certain words start out as identifiers, become reserved words in
 * later language revisions, and finally become language keywords.
 * This may happen at different times in desktop GLSL and GLSL ES.
 *
 * For example, consider the following lexer rule:
 * samplerBuffer       KEYWORD(130, 0, 140, 0, SAMPLERBUFFER)
 *
 * This means that "samplerBuffer" will be treated as:
 * - a keyword (SAMPLERBUFFER token)         ...in GLSL >= 1.40
 * - a reserved word - error                 ...in GLSL >= 1.30
 * - an identifier                           ...in GLSL <  1.30 or GLSL ES
 */
#define KEYWORD(reserved_glsl, reserved_glsl_es,			\
                allowed_glsl, allowed_glsl_es, token)			\
   KEYWORD_WITH_ALT(reserved_glsl, reserved_glsl_es,			\
                    allowed_glsl, allowed_glsl_es, false, token)

/**
 * Like the KEYWORD macro, but the word is also treated as a keyword
 * if the given boolean expression is true.
 */
#define KEYWORD_WITH_ALT(reserved_glsl, reserved_glsl_es,		\
                         allowed_glsl, allowed_glsl_es,			\
                         alt_expr, token)				\
   do {									\
      if (yyextra->is_version(allowed_glsl, allowed_glsl_es)		\
          || (alt_expr)) {						\
	 return token;							\
      } else if (yyextra->is_version(reserved_glsl,			\
                                     reserved_glsl_es)) {		\
	 _mesa_glsl_error(yylloc, yyextra,				\
			  "illegal use of reserved word `%s'", yytext);	\
	 return ERROR_TOK;						\
      } else {								\
	 void *mem_ctx = yyextra;					\
	 yylval->identifier = ralloc_strdup(mem_ctx, yytext);		\
	 return classify_identifier(yyextra, yytext);			\
      }									\
   } while (0)

/**
 * A macro for handling keywords that have been present in GLSL since
 * its origin, but were changed into reserved words in GLSL 3.00 ES.
 */
#define DEPRECATED_ES_KEYWORD(token)					\
   do {									\
      if (yyextra->is_version(0, 300)) {				\
	 _mesa_glsl_error(yylloc, yyextra,				\
			  "illegal use of reserved word `%s'", yytext);	\
	 return ERROR_TOK;						\
      } else {								\
         return token;							\
      }									\
   } while (0)

static int
literal_integer(char *text, int len, struct _mesa_glsl_parse_state *state,
		YYSTYPE *lval, YYLTYPE *lloc, int base)
{
   bool is_uint = (text[len - 1] == 'u' ||
		   text[len - 1] == 'U');
   const char *digits = text;

   /* Skip "0x" */
   if (base == 16)
      digits += 2;

#ifdef _MSC_VER
   unsigned __int64 value = _strtoui64(digits, NULL, base);
#else
   unsigned long long value = strtoull(digits, NULL, base);
#endif

   lval->n = (int)value;

   if (value > UINT_MAX) {
      /* Note that signed 0xffffffff is valid, not out of range! */
      if (state->is_version(130, 300)) {
	 _mesa_glsl_error(lloc, state,
			  "literal value `%s' out of range", text);
      } else {
	 _mesa_glsl_warning(lloc, state,
			    "literal value `%s' out of range", text);
      }
   } else if (base == 10 && !is_uint && (unsigned)value > (unsigned)INT_MAX + 1) {
      /* Tries to catch unintentionally providing a negative value.
       * Note that -2147483648 is parsed as -(2147483648), so we don't
       * want to warn for INT_MAX.
       */
      _mesa_glsl_warning(lloc, state,
			 "signed literal value `%s' is interpreted as %d",
			 text, lval->n);
   }
   return is_uint ? UINTCONSTANT : INTCONSTANT;
}

#define LITERAL_INTEGER(base) \
   literal_integer(yytext, yyleng, yyextra, yylval, yylloc, base)

%}

%option bison-bridge bison-locations reentrant noyywrap
%option nounput noyy_top_state
%option never-interactive
%option prefix="_mesa_glsl_lexer_"
%option extra-type="struct _mesa_glsl_parse_state *"
%option warn nodefault

	/* Note: When adding any start conditions to this list, you must also
	 * update the "Internal compiler error" catch-all rule near the end of
	 * this file. */
%x PP PRAGMA

DEC_INT		[1-9][0-9]*
HEX_INT		0[xX][0-9a-fA-F]+
OCT_INT		0[0-7]*
INT		({DEC_INT}|{HEX_INT}|{OCT_INT})
SPC		[ \t]*
SPCP		[ \t]+
HASH		^{SPC}#{SPC}
%%

[ \r\t]+		;

    /* Preprocessor tokens. */ 
^[ \t]*#[ \t]*$			;
^[ \t]*#[ \t]*version		{ BEGIN PP; return VERSION_TOK; }
^[ \t]*#[ \t]*extension		{ BEGIN PP; return EXTENSION; }
{HASH}line{SPCP}{INT}{SPCP}{INT}{SPC}$ {
				   /* Eat characters until the first digit is
				    * encountered
				    */
				   char *ptr = yytext;
				   while (!isdigit(*ptr))
				      ptr++;

				   /* Subtract one from the line number because
				    * yylineno is zero-based instead of
				    * one-based.
				    */
				   yylineno = strtol(ptr, &ptr, 0) - 1;

                                   /* From GLSL 3.30 and GLSL ES on, after processing the
                                    * line directive (including its new-line), the implementation
                                    * will behave as if it is compiling at the line number passed
                                    * as argument. It was line number + 1 in older specifications.
                                    */
                                   if (yyextra->is_version(330, 100))
                                      yylineno--;

				   yylloc->source = strtol(ptr, NULL, 0);
				}
{HASH}line{SPCP}{INT}{SPC}$	{
				   /* Eat characters until the first digit is
				    * encountered
				    */
				   char *ptr = yytext;
				   while (!isdigit(*ptr))
				      ptr++;

				   /* Subtract one from the line number because
				    * yylineno is zero-based instead of
				    * one-based.
				    */
				   yylineno = strtol(ptr, &ptr, 0) - 1;

                                   /* From GLSL 3.30 and GLSL ES on, after processing the
                                    * line directive (including its new-line), the implementation
                                    * will behave as if it is compiling at the line number passed
                                    * as argument. It was line number + 1 in older specifications.
                                    */
                                   if (yyextra->is_version(330, 100))
                                      yylineno--;
				}
^{SPC}#{SPC}pragma{SPCP}debug{SPC}\({SPC}on{SPC}\) {
				  BEGIN PP;
				  return PRAGMA_DEBUG_ON;
				}
^{SPC}#{SPC}pragma{SPCP}debug{SPC}\({SPC}off{SPC}\) {
				  BEGIN PP;
				  return PRAGMA_DEBUG_OFF;
				}
^{SPC}#{SPC}pragma{SPCP}optimize{SPC}\({SPC}on{SPC}\) {
				  BEGIN PP;
				  return PRAGMA_OPTIMIZE_ON;
				}
^{SPC}#{SPC}pragma{SPCP}optimize{SPC}\({SPC}off{SPC}\) {
				  BEGIN PP;
				  return PRAGMA_OPTIMIZE_OFF;
				}
^{SPC}#{SPC}pragma{SPCP}STDGL{SPCP}invariant{SPC}\({SPC}all{SPC}\) {
				  BEGIN PP;
				  return PRAGMA_INVARIANT_ALL;
				}
^{SPC}#{SPC}pragma{SPCP}	{ BEGIN PRAGMA; }

<PRAGMA>\n			{ BEGIN 0; yylineno++; yycolumn = 0; }
<PRAGMA>.			{ }

<PP>\/\/[^\n]*			{ }
<PP>[ \t\r]*			{ }
<PP>:				return COLON;
<PP>[_a-zA-Z][_a-zA-Z0-9]*	{
				   void *mem_ctx = yyextra;
				   yylval->identifier = ralloc_strdup(mem_ctx, yytext);
				   return IDENTIFIER;
				}
<PP>[1-9][0-9]*			{
				    yylval->n = strtol(yytext, NULL, 10);
				    return INTCONSTANT;
				}
<PP>\n				{ BEGIN 0; yylineno++; yycolumn = 0; return EOL; }
<PP>.				{ return yytext[0]; }

\n		{ yylineno++; yycolumn = 0; }

attribute	DEPRECATED_ES_KEYWORD(ATTRIBUTE);
const		return CONST_TOK;
bool		return BOOL_TOK;
float		return FLOAT_TOK;
int		return INT_TOK;
uint		KEYWORD(130, 300, 130, 300, UINT_TOK);

break		return BREAK;
continue	return CONTINUE;
do		return DO;
while		return WHILE;
else		return ELSE;
for		return FOR;
if		return IF;
discard		return DISCARD;
return		return RETURN;

bvec2		return BVEC2;
bvec3		return BVEC3;
bvec4		return BVEC4;
ivec2		return IVEC2;
ivec3		return IVEC3;
ivec4		return IVEC4;
uvec2		KEYWORD(130, 300, 130, 300, UVEC2);
uvec3		KEYWORD(130, 300, 130, 300, UVEC3);
uvec4		KEYWORD(130, 300, 130, 300, UVEC4);
vec2		return VEC2;
vec3		return VEC3;
vec4		return VEC4;
mat2		return MAT2X2;
mat3		return MAT3X3;
mat4		return MAT4X4;
mat2x2		KEYWORD(120, 300, 120, 300, MAT2X2);
mat2x3		KEYWORD(120, 300, 120, 300, MAT2X3);
mat2x4		KEYWORD(120, 300, 120, 300, MAT2X4);
mat3x2		KEYWORD(120, 300, 120, 300, MAT3X2);
mat3x3		KEYWORD(120, 300, 120, 300, MAT3X3);
mat3x4		KEYWORD(120, 300, 120, 300, MAT3X4);
mat4x2		KEYWORD(120, 300, 120, 300, MAT4X2);
mat4x3		KEYWORD(120, 300, 120, 300, MAT4X3);
mat4x4		KEYWORD(120, 300, 120, 300, MAT4X4);

in		return IN_TOK;
out		return OUT_TOK;
inout		return INOUT_TOK;
uniform		return UNIFORM;
buffer		return BUFFER;
varying		DEPRECATED_ES_KEYWORD(VARYING);
centroid	KEYWORD(120, 300, 120, 300, CENTROID);
invariant	KEYWORD(120, 100, 120, 100, INVARIANT);
flat		KEYWORD(130, 100, 130, 300, FLAT);
smooth		KEYWORD(130, 300, 130, 300, SMOOTH);
noperspective	KEYWORD(130, 300, 130, 0, NOPERSPECTIVE);
patch		KEYWORD_WITH_ALT(0, 300, 400, 0, yyextra->ARB_tessellation_shader_enable, PATCH);

sampler1D	DEPRECATED_ES_KEYWORD(SAMPLER1D);
sampler2D	return SAMPLER2D;
sampler3D	return SAMPLER3D;
samplerCube	return SAMPLERCUBE;
sampler1DArray	KEYWORD(130, 300, 130, 0, SAMPLER1DARRAY);
sampler2DArray	KEYWORD(130, 300, 130, 300, SAMPLER2DARRAY);
sampler1DShadow	DEPRECATED_ES_KEYWORD(SAMPLER1DSHADOW);
sampler2DShadow	return SAMPLER2DSHADOW;
samplerCubeShadow	KEYWORD(130, 300, 130, 300, SAMPLERCUBESHADOW);
sampler1DArrayShadow	KEYWORD(130, 300, 130, 0, SAMPLER1DARRAYSHADOW);
sampler2DArrayShadow	KEYWORD(130, 300, 130, 300, SAMPLER2DARRAYSHADOW);
isampler1D		KEYWORD(130, 300, 130, 0, ISAMPLER1D);
isampler2D		KEYWORD(130, 300, 130, 300, ISAMPLER2D);
isampler3D		KEYWORD(130, 300, 130, 300, ISAMPLER3D);
isamplerCube		KEYWORD(130, 300, 130, 300, ISAMPLERCUBE);
isampler1DArray		KEYWORD(130, 300, 130, 0, ISAMPLER1DARRAY);
isampler2DArray		KEYWORD(130, 300, 130, 300, ISAMPLER2DARRAY);
usampler1D		KEYWORD(130, 300, 130, 0, USAMPLER1D);
usampler2D		KEYWORD(130, 300, 130, 300, USAMPLER2D);
usampler3D		KEYWORD(130, 300, 130, 300, USAMPLER3D);
usamplerCube		KEYWORD(130, 300, 130, 300, USAMPLERCUBE);
usampler1DArray		KEYWORD(130, 300, 130, 0, USAMPLER1DARRAY);
usampler2DArray		KEYWORD(130, 300, 130, 300, USAMPLER2DARRAY);

   /* additional keywords in ARB_texture_multisample, included in GLSL 1.50 */
   /* these are reserved but not defined in GLSL 3.00 */
   /* [iu]sampler2DMS are defined in GLSL ES 3.10 */
sampler2DMS        KEYWORD_WITH_ALT(150, 300, 150, 310, yyextra->ARB_texture_multisample_enable, SAMPLER2DMS);
isampler2DMS       KEYWORD_WITH_ALT(150, 300, 150, 310, yyextra->ARB_texture_multisample_enable, ISAMPLER2DMS);
usampler2DMS       KEYWORD_WITH_ALT(150, 300, 150, 310, yyextra->ARB_texture_multisample_enable, USAMPLER2DMS);
sampler2DMSArray   KEYWORD_WITH_ALT(150, 300, 150, 320, yyextra->ARB_texture_multisample_enable || yyextra->OES_texture_storage_multisample_2d_array_enable, SAMPLER2DMSARRAY);
isampler2DMSArray  KEYWORD_WITH_ALT(150, 300, 150, 320, yyextra->ARB_texture_multisample_enable || yyextra->OES_texture_storage_multisample_2d_array_enable, ISAMPLER2DMSARRAY);
usampler2DMSArray  KEYWORD_WITH_ALT(150, 300, 150, 320, yyextra->ARB_texture_multisample_enable || yyextra->OES_texture_storage_multisample_2d_array_enable, USAMPLER2DMSARRAY);

   /* keywords available with ARB_texture_cube_map_array_enable extension on desktop GLSL */
samplerCubeArray   KEYWORD_WITH_ALT(400, 0, 400, 0, yyextra->ARB_texture_cube_map_array_enable, SAMPLERCUBEARRAY);
isamplerCubeArray KEYWORD_WITH_ALT(400, 0, 400, 0, yyextra->ARB_texture_cube_map_array_enable, ISAMPLERCUBEARRAY);
usamplerCubeArray KEYWORD_WITH_ALT(400, 0, 400, 0, yyextra->ARB_texture_cube_map_array_enable, USAMPLERCUBEARRAY);
samplerCubeArrayShadow   KEYWORD_WITH_ALT(400, 0, 400, 0, yyextra->ARB_texture_cube_map_array_enable, SAMPLERCUBEARRAYSHADOW);

samplerExternalOES		{
			  if (yyextra->OES_EGL_image_external_enable)
			     return SAMPLEREXTERNALOES;
			  else
			     return IDENTIFIER;
		}

   /* keywords available with ARB_gpu_shader5 */
precise		KEYWORD_WITH_ALT(400, 0, 400, 0, yyextra->ARB_gpu_shader5_enable, PRECISE);

   /* keywords available with ARB_shader_image_load_store */
image1D         KEYWORD_WITH_ALT(130, 300, 420, 0, yyextra->ARB_shader_image_load_store_enable, IMAGE1D);
image2D         KEYWORD_WITH_ALT(130, 300, 420, 310, yyextra->ARB_shader_image_load_store_enable, IMAGE2D);
image3D         KEYWORD_WITH_ALT(130, 300, 420, 310, yyextra->ARB_shader_image_load_store_enable, IMAGE3D);
image2DRect     KEYWORD_WITH_ALT(130, 300, 420, 0, yyextra->ARB_shader_image_load_store_enable, IMAGE2DRECT);
imageCube       KEYWORD_WITH_ALT(130, 300, 420, 310, yyextra->ARB_shader_image_load_store_enable, IMAGECUBE);
imageBuffer     KEYWORD_WITH_ALT(130, 300, 420, 0, yyextra->ARB_shader_image_load_store_enable, IMAGEBUFFER);
image1DArray    KEYWORD_WITH_ALT(130, 300, 420, 0, yyextra->ARB_shader_image_load_store_enable, IMAGE1DARRAY);
image2DArray    KEYWORD_WITH_ALT(130, 300, 420, 310, yyextra->ARB_shader_image_load_store_enable, IMAGE2DARRAY);
imageCubeArray  KEYWORD_WITH_ALT(130, 300, 420, 0, yyextra->ARB_shader_image_load_store_enable, IMAGECUBEARRAY);
image2DMS       KEYWORD_WITH_ALT(130, 300, 420, 0, yyextra->ARB_shader_image_load_store_enable, IMAGE2DMS);
image2DMSArray  KEYWORD_WITH_ALT(130, 300, 420, 0, yyextra->ARB_shader_image_load_store_enable, IMAGE2DMSARRAY);
iimage1D        KEYWORD_WITH_ALT(130, 300, 420, 0, yyextra->ARB_shader_image_load_store_enable, IIMAGE1D);
iimage2D        KEYWORD_WITH_ALT(130, 300, 420, 310, yyextra->ARB_shader_image_load_store_enable, IIMAGE2D);
iimage3D        KEYWORD_WITH_ALT(130, 300, 420, 310, yyextra->ARB_shader_image_load_store_enable, IIMAGE3D);
iimage2DRect    KEYWORD_WITH_ALT(130, 300, 420, 0, yyextra->ARB_shader_image_load_store_enable, IIMAGE2DRECT);
iimageCube      KEYWORD_WITH_ALT(130, 300, 420, 310, yyextra->ARB_shader_image_load_store_enable, IIMAGECUBE);
iimageBuffer    KEYWORD_WITH_ALT(130, 300, 420, 0, yyextra->ARB_shader_image_load_store_enable, IIMAGEBUFFER);
iimage1DArray   KEYWORD_WITH_ALT(130, 300, 420, 0, yyextra->ARB_shader_image_load_store_enable, IIMAGE1DARRAY);
iimage2DArray   KEYWORD_WITH_ALT(130, 300, 420, 310, yyextra->ARB_shader_image_load_store_enable, IIMAGE2DARRAY);
iimageCubeArray KEYWORD_WITH_ALT(130, 300, 420, 0, yyextra->ARB_shader_image_load_store_enable, IIMAGECUBEARRAY);
iimage2DMS      KEYWORD_WITH_ALT(130, 300, 420, 0, yyextra->ARB_shader_image_load_store_enable, IIMAGE2DMS);
iimage2DMSArray KEYWORD_WITH_ALT(130, 300, 420, 0, yyextra->ARB_shader_image_load_store_enable, IIMAGE2DMSARRAY);
uimage1D        KEYWORD_WITH_ALT(130, 300, 420, 0, yyextra->ARB_shader_image_load_store_enable, UIMAGE1D);
uimage2D        KEYWORD_WITH_ALT(130, 300, 420, 310, yyextra->ARB_shader_image_load_store_enable, UIMAGE2D);
uimage3D        KEYWORD_WITH_ALT(130, 300, 420, 310, yyextra->ARB_shader_image_load_store_enable, UIMAGE3D);
uimage2DRect    KEYWORD_WITH_ALT(130, 300, 420, 0, yyextra->ARB_shader_image_load_store_enable, UIMAGE2DRECT);
uimageCube      KEYWORD_WITH_ALT(130, 300, 420, 310, yyextra->ARB_shader_image_load_store_enable, UIMAGECUBE);
uimageBuffer    KEYWORD_WITH_ALT(130, 300, 420, 0, yyextra->ARB_shader_image_load_store_enable, UIMAGEBUFFER);
uimage1DArray   KEYWORD_WITH_ALT(130, 300, 420, 0, yyextra->ARB_shader_image_load_store_enable, UIMAGE1DARRAY);
uimage2DArray   KEYWORD_WITH_ALT(130, 300, 420, 310, yyextra->ARB_shader_image_load_store_enable, UIMAGE2DARRAY);
uimageCubeArray KEYWORD_WITH_ALT(130, 300, 420, 0, yyextra->ARB_shader_image_load_store_enable, UIMAGECUBEARRAY);
uimage2DMS      KEYWORD_WITH_ALT(130, 300, 420, 0, yyextra->ARB_shader_image_load_store_enable, UIMAGE2DMS);
uimage2DMSArray KEYWORD_WITH_ALT(130, 300, 420, 0, yyextra->ARB_shader_image_load_store_enable, UIMAGE2DMSARRAY);
image1DShadow           KEYWORD(130, 300, 0, 0, IMAGE1DSHADOW);
image2DShadow           KEYWORD(130, 300, 0, 0, IMAGE2DSHADOW);
image1DArrayShadow      KEYWORD(130, 300, 0, 0, IMAGE1DARRAYSHADOW);
image2DArrayShadow      KEYWORD(130, 300, 0, 0, IMAGE2DARRAYSHADOW);

coherent       KEYWORD_WITH_ALT(420, 300, 420, 310, yyextra->ARB_shader_image_load_store_enable || yyextra->ARB_shader_storage_buffer_object_enable, COHERENT);
volatile       KEYWORD_WITH_ALT(110, 100, 420, 310, yyextra->ARB_shader_image_load_store_enable || yyextra->ARB_shader_storage_buffer_object_enable, VOLATILE);
restrict       KEYWORD_WITH_ALT(420, 300, 420, 310, yyextra->ARB_shader_image_load_store_enable || yyextra->ARB_shader_storage_buffer_object_enable, RESTRICT);
readonly       KEYWORD_WITH_ALT(420, 300, 420, 310, yyextra->ARB_shader_image_load_store_enable || yyextra->ARB_shader_storage_buffer_object_enable, READONLY);
writeonly      KEYWORD_WITH_ALT(420, 300, 420, 310, yyextra->ARB_shader_image_load_store_enable || yyextra->ARB_shader_storage_buffer_object_enable, WRITEONLY);

atomic_uint     KEYWORD_WITH_ALT(420, 300, 420, 310, yyextra->ARB_shader_atomic_counters_enable, ATOMIC_UINT);

shared          KEYWORD_WITH_ALT(430, 310, 430, 310, yyextra->ARB_compute_shader_enable, SHARED);

struct		return STRUCT;
void		return VOID_TOK;

layout		{
		  if ((yyextra->is_version(140, 300))
		      || yyextra->AMD_conservative_depth_enable
		      || yyextra->ARB_conservative_depth_enable
		      || yyextra->ARB_explicit_attrib_location_enable
		      || yyextra->ARB_explicit_uniform_location_enable
                      || yyextra->has_separate_shader_objects()
		      || yyextra->ARB_uniform_buffer_object_enable
		      || yyextra->ARB_fragment_coord_conventions_enable
                      || yyextra->ARB_shading_language_420pack_enable
                      || yyextra->ARB_compute_shader_enable
                      || yyextra->ARB_tessellation_shader_enable) {
		      return LAYOUT_TOK;
		   } else {
		      void *mem_ctx = yyextra;
		      yylval->identifier = ralloc_strdup(mem_ctx, yytext);
		      return classify_identifier(yyextra, yytext);
		   }
		}

\+\+		return INC_OP;
--		return DEC_OP;
\<=		return LE_OP;
>=		return GE_OP;
==		return EQ_OP;
!=		return NE_OP;
&&		return AND_OP;
\|\|		return OR_OP;
"^^"		return XOR_OP;
"<<"		return LEFT_OP;
">>"		return RIGHT_OP;

\*=		return MUL_ASSIGN;
\/=		return DIV_ASSIGN;
\+=		return ADD_ASSIGN;
\%=		return MOD_ASSIGN;
\<\<=		return LEFT_ASSIGN;
>>=		return RIGHT_ASSIGN;
&=		return AND_ASSIGN;
"^="		return XOR_ASSIGN;
\|=		return OR_ASSIGN;
-=		return SUB_ASSIGN;

[1-9][0-9]*[uU]?	{
			    return LITERAL_INTEGER(10);
			}
0[xX][0-9a-fA-F]+[uU]?	{
			    return LITERAL_INTEGER(16);
			}
0[0-7]*[uU]?		{
			    return LITERAL_INTEGER(8);
			}

[0-9]+\.[0-9]+([eE][+-]?[0-9]+)?[fF]?	|
\.[0-9]+([eE][+-]?[0-9]+)?[fF]?		|
[0-9]+\.([eE][+-]?[0-9]+)?[fF]?		|
[0-9]+[eE][+-]?[0-9]+[fF]?		{
			    yylval->real = _mesa_strtof(yytext, NULL);
			    return FLOATCONSTANT;
			}

[0-9]+\.[0-9]+([eE][+-]?[0-9]+)?(lf|LF)	|
\.[0-9]+([eE][+-]?[0-9]+)?(lf|LF)	|
[0-9]+\.([eE][+-]?[0-9]+)?(lf|LF)	|
[0-9]+[eE][+-]?[0-9]+(lf|LF)		{
			    if (!yyextra->is_version(400, 0) &&
			        !yyextra->ARB_gpu_shader_fp64_enable)
			        return ERROR_TOK;
			    yylval->dreal = _mesa_strtod(yytext, NULL);
			    return DOUBLECONSTANT;
			}

true			{
			    yylval->n = 1;
			    return BOOLCONSTANT;
			}
false			{
			    yylval->n = 0;
			    return BOOLCONSTANT;
			}


    /* Reserved words in GLSL 1.10. */
asm		KEYWORD(110, 100, 0, 0, ASM);
class		KEYWORD(110, 100, 0, 0, CLASS);
union		KEYWORD(110, 100, 0, 0, UNION);
enum		KEYWORD(110, 100, 0, 0, ENUM);
typedef		KEYWORD(110, 100, 0, 0, TYPEDEF);
template	KEYWORD(110, 100, 0, 0, TEMPLATE);
this		KEYWORD(110, 100, 0, 0, THIS);
packed		KEYWORD_WITH_ALT(110, 100, 140, 300, yyextra->ARB_uniform_buffer_object_enable, PACKED_TOK);
goto		KEYWORD(110, 100, 0, 0, GOTO);
switch		KEYWORD(110, 100, 130, 300, SWITCH);
default		KEYWORD(110, 100, 130, 300, DEFAULT);
inline		KEYWORD(110, 100, 0, 0, INLINE_TOK);
noinline	KEYWORD(110, 100, 0, 0, NOINLINE);
public		KEYWORD(110, 100, 0, 0, PUBLIC_TOK);
static		KEYWORD(110, 100, 0, 0, STATIC);
extern		KEYWORD(110, 100, 0, 0, EXTERN);
external	KEYWORD(110, 100, 0, 0, EXTERNAL);
interface	KEYWORD(110, 100, 0, 0, INTERFACE);
long		KEYWORD(110, 100, 0, 0, LONG_TOK);
short		KEYWORD(110, 100, 0, 0, SHORT_TOK);
double		KEYWORD_WITH_ALT(110, 100, 400, 0, yyextra->ARB_gpu_shader_fp64_enable, DOUBLE_TOK);
half		KEYWORD(110, 100, 0, 0, HALF);
fixed		KEYWORD(110, 100, 0, 0, FIXED_TOK);
unsigned	KEYWORD(110, 100, 0, 0, UNSIGNED);
input		KEYWORD(110, 100, 0, 0, INPUT_TOK);
output		KEYWORD(110, 100, 0, 0, OUTPUT);
hvec2		KEYWORD(110, 100, 0, 0, HVEC2);
hvec3		KEYWORD(110, 100, 0, 0, HVEC3);
hvec4		KEYWORD(110, 100, 0, 0, HVEC4);
dvec2		KEYWORD_WITH_ALT(110, 100, 400, 0, yyextra->ARB_gpu_shader_fp64_enable, DVEC2);
dvec3		KEYWORD_WITH_ALT(110, 100, 400, 0, yyextra->ARB_gpu_shader_fp64_enable, DVEC3);
dvec4		KEYWORD_WITH_ALT(110, 100, 400, 0, yyextra->ARB_gpu_shader_fp64_enable, DVEC4);
dmat2		KEYWORD_WITH_ALT(110, 100, 400, 0, yyextra->ARB_gpu_shader_fp64_enable, DMAT2X2);
dmat3		KEYWORD_WITH_ALT(110, 100, 400, 0, yyextra->ARB_gpu_shader_fp64_enable, DMAT3X3);
dmat4		KEYWORD_WITH_ALT(110, 100, 400, 0, yyextra->ARB_gpu_shader_fp64_enable, DMAT4X4);
dmat2x2		KEYWORD_WITH_ALT(110, 100, 400, 0, yyextra->ARB_gpu_shader_fp64_enable, DMAT2X2);
dmat2x3		KEYWORD_WITH_ALT(110, 100, 400, 0, yyextra->ARB_gpu_shader_fp64_enable, DMAT2X3);
dmat2x4		KEYWORD_WITH_ALT(110, 100, 400, 0, yyextra->ARB_gpu_shader_fp64_enable, DMAT2X4);
dmat3x2		KEYWORD_WITH_ALT(110, 100, 400, 0, yyextra->ARB_gpu_shader_fp64_enable, DMAT3X2);
dmat3x3		KEYWORD_WITH_ALT(110, 100, 400, 0, yyextra->ARB_gpu_shader_fp64_enable, DMAT3X3);
dmat3x4		KEYWORD_WITH_ALT(110, 100, 400, 0, yyextra->ARB_gpu_shader_fp64_enable, DMAT3X4);
dmat4x2		KEYWORD_WITH_ALT(110, 100, 400, 0, yyextra->ARB_gpu_shader_fp64_enable, DMAT4X2);
dmat4x3		KEYWORD_WITH_ALT(110, 100, 400, 0, yyextra->ARB_gpu_shader_fp64_enable, DMAT4X3);
dmat4x4		KEYWORD_WITH_ALT(110, 100, 400, 0, yyextra->ARB_gpu_shader_fp64_enable, DMAT4X4);
fvec2		KEYWORD(110, 100, 0, 0, FVEC2);
fvec3		KEYWORD(110, 100, 0, 0, FVEC3);
fvec4		KEYWORD(110, 100, 0, 0, FVEC4);
sampler2DRect		DEPRECATED_ES_KEYWORD(SAMPLER2DRECT);
sampler3DRect		KEYWORD(110, 100, 0, 0, SAMPLER3DRECT);
sampler2DRectShadow	DEPRECATED_ES_KEYWORD(SAMPLER2DRECTSHADOW);
sizeof		KEYWORD(110, 100, 0, 0, SIZEOF);
cast		KEYWORD(110, 100, 0, 0, CAST);
namespace	KEYWORD(110, 100, 0, 0, NAMESPACE);
using		KEYWORD(110, 100, 0, 0, USING);

    /* Additional reserved words in GLSL 1.20. */
lowp		KEYWORD(120, 100, 130, 100, LOWP);
mediump		KEYWORD(120, 100, 130, 100, MEDIUMP);
highp		KEYWORD(120, 100, 130, 100, HIGHP);
precision	KEYWORD(120, 100, 130, 100, PRECISION);

    /* Additional reserved words in GLSL 1.30. */
case		KEYWORD(130, 300, 130, 300, CASE);
common		KEYWORD(130, 300, 0, 0, COMMON);
partition	KEYWORD(130, 300, 0, 0, PARTITION);
active		KEYWORD(130, 300, 0, 0, ACTIVE);
superp		KEYWORD(130, 100, 0, 0, SUPERP);
samplerBuffer	KEYWORD(130, 300, 140, 0, SAMPLERBUFFER);
filter		KEYWORD(130, 300, 0, 0, FILTER);
row_major	KEYWORD_WITH_ALT(130, 0, 140, 0, yyextra->ARB_uniform_buffer_object_enable && !yyextra->es_shader, ROW_MAJOR);

    /* Additional reserved words in GLSL 1.40 */
isampler2DRect	KEYWORD(140, 300, 140, 0, ISAMPLER2DRECT);
usampler2DRect	KEYWORD(140, 300, 140, 0, USAMPLER2DRECT);
isamplerBuffer	KEYWORD(140, 300, 140, 0, ISAMPLERBUFFER);
usamplerBuffer	KEYWORD(140, 300, 140, 0, USAMPLERBUFFER);

    /* Additional reserved words in GLSL ES 3.00 */
resource	KEYWORD(0, 300, 0, 0, RESOURCE);
sample		KEYWORD_WITH_ALT(400, 300, 400, 0, yyextra->ARB_gpu_shader5_enable, SAMPLE);
subroutine	KEYWORD_WITH_ALT(400, 300, 400, 0, yyextra->ARB_shader_subroutine_enable, SUBROUTINE);


[_a-zA-Z][_a-zA-Z0-9]*	{
			    struct _mesa_glsl_parse_state *state = yyextra;
			    void *ctx = state;	
			    if (state->es_shader && strlen(yytext) > 1024) {
			       _mesa_glsl_error(yylloc, state,
			                        "Identifier `%s' exceeds 1024 characters",
			                        yytext);
			    } else {
			      yylval->identifier = ralloc_strdup(ctx, yytext);
			    }
			    return classify_identifier(state, yytext);
			}

\.			{ struct _mesa_glsl_parse_state *state = yyextra;
			  state->is_field = true;
			  return DOT_TOK; }

.			{ return yytext[0]; }

%%

int
classify_identifier(struct _mesa_glsl_parse_state *state, const char *name)
{
   if (state->is_field) {
      state->is_field = false;
      return FIELD_SELECTION;
   }
   if (state->symbols->get_variable(name) || state->symbols->get_function(name))
      return IDENTIFIER;
   else if (state->symbols->get_type(name))
      return TYPE_IDENTIFIER;
   else
      return NEW_IDENTIFIER;
}

void
_mesa_glsl_lexer_ctor(struct _mesa_glsl_parse_state *state, const char *string)
{
   yylex_init_extra(state, & state->scanner);
   yy_scan_string(string, state->scanner);
}

void
_mesa_glsl_lexer_dtor(struct _mesa_glsl_parse_state *state)
{
   yylex_destroy(state->scanner);
}