File: cpp_scope_grammar.y

package info (click to toggle)
codelite 12.0+dfsg-1
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 95,112 kB
  • sloc: cpp: 424,040; ansic: 18,284; php: 9,569; lex: 4,186; yacc: 2,820; python: 2,294; sh: 312; makefile: 51; xml: 13
file content (676 lines) | stat: -rw-r--r-- 22,186 bytes parent folder | download | duplicates (3)
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
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
%{
// Copyright Eran Ifrah(c)
%}

%{
/*************** Includes and Defines *****************************/
#include <string>
#include <vector>
#include <stdio.h>
#include <map>
#include <string.h>

#define YYDEBUG_LEXER_TEXT (cl_scope_lval)
#define YYSTYPE std::string
#define YYDEBUG 0        /* get the pretty debugging code to compile*/
static std::string readInitializer(const char* delim);
static void readClassName();

static std::string className;

static std::string templateInitList;
int cl_scope_parse();
void cl_scope_error(char *string);
void syncParser();

static std::vector<std::string> gs_additionlNS;

//---------------------------------------------
// externs defined in the lexer
//---------------------------------------------
extern char *cl_scope_text;
extern int cl_scope_lex();
extern bool setLexerInput(const std::string &in, const std::map<std::string, std::string> &ignoreTokens);
extern int cl_scope_lineno;
extern std::vector<std::string> currentScope;
extern void printScopeName();	//print the current scope name
extern void increaseScope();	//increase scope with anonymouse value
extern std::string getCurrentScope();
extern void cl_scope_lex_clean();
extern void cl_scope_less(int count);

/*************** Standard ytab.c continues here *********************/
%}

/*************************************************************************/

/* This group is used by the C/C++ language parser */
%token  LE_AUTO            LE_DOUBLE          LE_INT             LE_STRUCT
%token  LE_BREAK           LE_ELSE            LE_LONG            LE_SWITCH
%token  LE_CASE            LE_ENUM            LE_REGISTER        LE_TYPEDEF
%token  LE_CHAR            LE_EXTERN          LE_RETURN          LE_UNION
%token  LE_CONST           LE_FLOAT           LE_SHORT           LE_UNSIGNED      LE_BOOL
%token  LE_CONTINUE        LE_FOR             LE_SIGNED          LE_VOID
%token  LE_DEFAULT         LE_GOTO            LE_SIZEOF          LE_VOLATILE
%token  LE_DO              LE_IF              LE_STATIC          LE_WHILE

/* The following are used in C++ only.  ANSI C would call these IDENTIFIERs */
%token  LE_NEW             LE_DELETE
%token  LE_THIS
%token  LE_OPERATOR
%token  LE_CLASS
%token  LE_PUBLIC          LE_PROTECTED       LE_PRIVATE
%token  LE_VIRTUAL         LE_FRIEND
%token  LE_INLINE          LE_OVERLOAD LE_OVERRIDE LE_FINAL
%token  LE_TEMPLATE		   LE_TYPENAME
%token  LE_THROW		  	LE_CATCH
/* ANSI C Grammar suggestions */
%token  LE_IDENTIFIER              LE_STRINGliteral
%token  LE_FLOATINGconstant        LE_INTEGERconstant        LE_CHARACTERconstant
%token  LE_OCTALconstant           LE_HEXconstant
%token  LE_POUNDPOUND LE_CComment LE_CPPComment LE_NAMESPACE LE_USING

/* New Lexical element, whereas ANSI C suggested non-terminal */
%token  LE_TYPEDEFname

/* Multi-Character operators */
%token   LE_ARROW            											/*    ->                              */
%token   LE_ICR LE_DECR         										/*    ++      --                      */
%token   LE_LS LE_RS            										/*    <<      >>                      */
%token   LE_LE LE_GE LE_EQ LE_NE      								/*    <=      >=      ==      !=      */
%token   LE_ANDAND LE_OROR      										/*    &&      ||                      */
%token   LE_ELLIPSIS         											/*    ...                             */
            /* Following are used in C++, not ANSI C        */
%token   LE_CLCL             											/*    ::                              */
%token   LE_DOTstar LE_ARROWstar										/*    .*       ->*                    */

/* modifying assignment operators */
%token  LE_MULTassign  LE_DIVassign    LE_MODassign   	/*   *=      /=      %=      */
%token  LE_PLUSassign  LE_MINUSassign              		/*   +=      -=              */
%token  LE_LSassign    LE_RSassign                 		/*   <<=     >>=             */
%token  LE_ANDassign   LE_ERassign     LE_ORassign    	/*   &=      ^=      |=      */
%token  LE_MACRO
%token  LE_DYNAMIC_CAST
%token  LE_STATIC_CAST
%token  LE_CONST_CAST
%token  LE_REINTERPRET_CAST
%token  LE_SIZE_T
%token  LE_TIME_T

%token LE_DECLSPEC
%token LE_DLLIMPORT
%token LE_DLLIEXPORT

%start   translation_unit

%%
/* Costants */
basic_type_name_inter:    LE_INT          { $$ = $1; }
                |         LE_CHAR         { $$ = $1; }
                |         LE_SHORT        { $$ = $1; }
                |         LE_LONG         { $$ = $1; }
                |         LE_FLOAT        { $$ = $1; }
                |         LE_DOUBLE       { $$ = $1; }
                |         LE_SIGNED       { $$ = $1; }
                |         LE_UNSIGNED     { $$ = $1; }
                |         LE_VOID         { $$ = $1; }
                |         LE_BOOL         { $$ = $1; }
                |         LE_SIZE_T       { $$ = $1; }
                ;

basic_type_name:	LE_UNSIGNED basic_type_name_inter     { $$ = $1 + " " + $2; }
                |	LE_SIGNED basic_type_name_inter     { $$ = $1 + " " + $2; }
                |	LE_LONG LE_LONG                     { $$ = $1 + " " + $2; }
                |	LE_LONG LE_INT                         { $$ = $1 + " " + $2; }
                |	basic_type_name_inter                   { $$ = $1; }
                ;


/* ========================================================================*/
/* find declarations																   */
/* ========================================================================*/

translation_unit	:		/*empty*/
                        | translation_unit external_decl
                        ;

external_decl			:	class_decl
                        |   dummy_case
                        |	enum_decl
                        |	union_decl
                        | 	function_decl
                        |	namespace_decl
                        |	using_namespace
                        | 	scope_reducer
                        | 	scope_increaer
                        |  	question_expression
                        | 	error {
                                //printf("CodeLite: syntax error, unexpected token '%s' found at line %d \n", cl_scope_text, cl_scope_lineno);
                                //syncParser();
                            }
                        ;


/*templates*/
template_arg		:	/* empty */	{ $$ = "";}
                        | template_specifiter LE_IDENTIFIER {$$ = $1 + " " + $2;}
                        | template_specifiter LE_IDENTIFIER '=' {$$ = $1 + " " + $2 + "=" + readInitializer(",>");}
                        ;

template_arg_list	:	template_arg	{ $$ = $1; }
                        | 	template_arg_list ',' template_arg	{ $$ = $1 + " " + $2 + " " + $3; }
                        ;

template_specifiter	:	LE_CLASS	{ $$ = $1; }
                            |	LE_TYPENAME	{ $$ = $1; }
                            ;

opt_template_qualifier	: /*empty*/
                            | LE_TEMPLATE '<' template_arg_list '>' { 
                                $$ = $1 + $2 + $3 + $4;
                            }
                            ;
///*inheritance*/
//derivation_list			:	/*empty*/ {$$ = "";}
//							|	parent_class {$$ = $1;}
//							| 	derivation_list ',' parent_class {$$ = $1 + $2 + $3;}
//							;

//parent_class				: 	access_specifier class_name opt_template_specifier {$$ = $1 + " " + $2 + $3;}
                            ;
//class_name                  : LE_IDENTIFIER                    {$$ = $1;}
//							| class_name LE_CLCL LE_IDENTIFIER {$$ = $1 + $2 + $3;}
                            ;

//opt_template_specifier	: /*empty*/	{$$ = "";}
//							| '<' template_parameter_list '>' {$$ = $1 + $2 + $3;}
//							;

//access_specifier			:	/*empty*/	{$$ = "";}
//							|	LE_PUBLIC {$$ = $1;}
//							| 	LE_PRIVATE {$$ = $1;}
//							| 	LE_PROTECTED {$$ = $1;}
                            ;

/* the following rules are for template parameters no declarations! */
template_parameter_list	: /* empty */		{$$ = "";}
                            | template_parameter	{$$ = $1;}
                            | template_parameter_list ',' template_parameter {$$ = $1 + $2 + $3;}
                            ;

/*template_parameter		:	const_spec nested_scope_specifier LE_IDENTIFIER special_star_amp {$$ = $1 + $2 + $3 +$4;}
                            ;*/
template_parameter	:	const_spec nested_scope_specifier LE_IDENTIFIER special_star_amp
                        {
                            $$ = $1 +  $2 + $3 +$4;
                        }
                    |  	const_spec nested_scope_specifier basic_type_name special_star_amp
                        {
                            $$ = $1 +  $2 + $3 +$4;
                        }
                    |  	const_spec nested_scope_specifier LE_IDENTIFIER '<' template_parameter_list '>' special_star_amp
                        {
                            $$ = $1 + $2 + $3 +$4 + $5 + $6 + $7 + " " ;
                        }
                        ;

using_namespace:	LE_USING LE_NAMESPACE nested_scope_specifier LE_IDENTIFIER ';'
                    {
                        gs_additionlNS.push_back($3+$4);
                    }
                ;

/* namespace */
namespace_decl	:	stmnt_starter LE_NAMESPACE LE_IDENTIFIER '{'
                        {
                            currentScope.push_back($3);
                            
                        }
                    |	stmnt_starter LE_NAMESPACE '{'
                        {
                            //anonymouse namespace
                            increaseScope();
                            
                        }
                    ;
/* the class rule itself */
class_decl	:	stmnt_starter opt_template_qualifier class_keyword
                {
                    readClassName();
                    //increase the scope level
                    if(className.empty() == false) {
                        currentScope.push_back( className );
                        printScopeName();
                    }
                }
                ;

scope_reducer		:	'}'	{
                                if(currentScope.empty())
                                {
                                    //fatal error!
                                    //printf("CodeLite: fatal error - cant go beyond global scope!\n");
                                }
                                else
                                {
                                    currentScope.pop_back();
                                    printScopeName();
                                }
                            }
                    ;
scope_increaer	:	'{' {
                                //increase random scope
                                increaseScope();
                                printScopeName();
                             }

question_expression : '?'
                        {
                            consumeNotIncluding(';');
                        }

class_keyword: 	LE_CLASS	{$$ = $1;}
             |	LE_STRUCT	{$$ = $1;}
             ;

func_name: LE_IDENTIFIER {$$ = $1;}
         | LE_OPERATOR any_operator {$$ = $1 + $2;}
         ;

any_operator:
        '+'
        | '='
        | '*'
        | '/'
        | '%'
        | '^'
        | '&'
        | '|'
        | '~'
        | '!'
        | '<'
        | '>'
        | LE_LS
        | LE_RS
        | LE_ANDAND
        | LE_OROR
        | LE_ARROW
        | LE_ARROWstar
        | '.'
        | LE_DOTstar
        | LE_ICR
        | LE_DECR
        | LE_LE
        | LE_GE
        | LE_EQ
        | LE_NE
        | '(' ')' {$$ = $1 + $2;}
        | '[' ']' {$$ = $1 + $2;}
        | LE_NEW
        | LE_DELETE
        | ','
        | LE_MULTassign
        | LE_DIVassign
        | LE_MODassign
        | LE_PLUSassign
        | LE_MINUSassign
        | LE_LSassign
        | LE_RSassign
        | LE_ANDassign
        | LE_ERassign
        | LE_ORassign
        ;

optional_initialization_list: '{' {$$ = '{';}/* empty */
        | ':' {consumeInitializationList() /*eat everything including the open brace*/;}
        ;

declare_throw: 	/*empty*/ {$$ = "";}
            |	LE_THROW '(' template_parameter_list ')' {$$ = $3;}
            ;

dummy_case : LE_CASE LE_IDENTIFIER 
{
    // eat up all tokens not including the ':'
    consumeNotIncluding(':');
}
;
/* functions */
function_decl	: 	stmnt_starter opt_template_qualifier virtual_spec const_spec variable_decl nested_scope_specifier func_name '(' {consumeFuncArgList();} const_spec declare_throw '{'
                    {
                        //printf("found function %s\n", $7.c_str());
                        //trim down trailing '::' from scope name
                        if($6.find_last_not_of(":") != std::string::npos){
                            $6.erase($6.find_last_not_of(":")+1);
                        }
                        currentScope.push_back($6);
                        printScopeName();
                    }
                |	stmnt_starter opt_template_qualifier virtual_spec const_spec nested_scope_specifier func_name '(' {consumeFuncArgList();}  optional_initialization_list
                    {

                        //trim down trailing '::' from scope name
                        if($5.find_last_not_of(":") != std::string::npos){
                            $5.erase($5.find_last_not_of(":")+1);
                        }
                        currentScope.push_back($5);
                        printScopeName();
                    }
                |	stmnt_starter opt_template_qualifier virtual_spec const_spec nested_scope_specifier '~' func_name '(' {consumeFuncArgList();} const_spec  '{'
                    {

                        //trim down trailing '::' from scope name
                        if($5.find_last_not_of(":") != std::string::npos){
                            $5.erase($5.find_last_not_of(":")+1);
                        }
                        currentScope.push_back($5);
                        printScopeName();
                    }
                ;

/*
applicable for C++, for cases where a function is declared as
void scope::foo(){ ... }
*/
nested_scope_specifier		: /*empty*/ {$$ = "";}
                            | nested_scope_specifier scope_specifier {	$$ = $1 + $2;}
                            ;

scope_specifier		:	LE_IDENTIFIER LE_CLCL {$$ = $1+ $2;}
                        |	LE_IDENTIFIER  '<' {consumeTemplateDecl();} LE_CLCL {$$ = $1 + $4;}
                        ;

virtual_spec		:	/* empty */	{$$ = ""; }
                        | 	LE_VIRTUAL 	{ $$ = $1; }
                        ;

const_spec			:	/* empty */	{$$ = ""; }
                        | 	LE_CONST 	{ $$ = $1; }
                        ;

amp_item				:	/*empty*/	{$$ = ""; }
                        |   '&' 			{ $$ = $1; }
                        ;

star_list			: 	/*empty*/		{$$ = ""; }
                        |	star_list '*'	{$$ = $1 + $2;}
                        ;

special_star_amp		:	star_list amp_item { $$ = $1 + $2; }
                        ;

stmnt_starter		:	/*empty*/ {$$ = "";}
                        | ';' { $$ = ";";}
                        | ':' { $$ = ":";}	//e.g. private: std::string m_name;
                        ;

/** Variables **/
variable_decl			:	nested_scope_specifier basic_type_name special_star_amp
                            {$$ = $1 + $2 + $3  ;}
                        |	nested_scope_specifier LE_IDENTIFIER special_star_amp
                            {$$ = $1 + $2 + $3  ;}
                        | 	nested_scope_specifier LE_IDENTIFIER '<' template_parameter_list '>' special_star_amp
                            {$$ = $1 + $2 + $3  + $4 + $5 + $6 ;}
                        ;

enum_decl				:	stmnt_starter LE_ENUM LE_IDENTIFIER '{' {currentScope.push_back($3); printScopeName();} enum_arg_list '}'
                        {
                            currentScope.pop_back();//reduce the scope
                            printScopeName();
                            //printf("found enum: %s, args are: %s\n", $2.c_str(), $5.c_str());
                        }
                        ;

enum_optional_assign	:	/*empty*/ {$$ = "";}
                        |	'=' LE_HEXconstant	{$$ = $1 + $2;}
                        |	'='	 LE_OCTALconstant {$$ = $1 + $2;}
                        |	'='	 LE_INTEGERconstant {$$ = $1 + $2;}
                        ;

enum_argument			:	LE_IDENTIFIER	enum_optional_assign {$$ = $1 + $2;}
                        ;
enum_arg_list			:	/*empty*/ {$$ = "";}
                        |	enum_argument	{$$ = $1;}
                        |	enum_arg_list ',' enum_argument {$$ = $1 + $2 + $3;}
                        ;

union_decl			:	stmnt_starter LE_UNION LE_IDENTIFIER '{'
                            {
                                currentScope.push_back($3);
                                printScopeName();
                                consumeDecl();
                                printScopeName();
                            }
                        ;
%%
void yyerror(char *s) {}

void syncParser(){
    //move lexer to the next ';' line or scope opening '{'
    //int ch = cl_scope_lex();
}

//swallow all tokens up to the first '{'
void consumeInitializationList(){
    while( true ){
        int ch = cl_scope_lex();
        if(ch == 0){
            break;
        }

        if(ch == '{'){
            break;
        }
    }
}

void consumeFuncArgList(){
    int depth = 1;
    while(depth > 0){
        int ch = cl_scope_lex();
        if(ch == 0){
            break;
        }

        if(ch == ')'){
            depth--;
            continue;
        }
        else if(ch == '('){
            depth ++ ;
            continue;
        }
    }
}

void readClassName()
{
#define NEXT_TOK()          c = cl_scope_lex(); if(c == 0) {className.clear(); return;}
#define BREAK_IF_NOT(x)     if(c != (int)x) {className.clear(); break;}
#define BREAK_IF_NOT2(x, y) if(c != (int)x && c != (int)y) break;
#define BREAK_IF(x)         if(c == (int)x) break;

    className.clear();
    
    // look ahead and see if we can see another 
    while( true ){
        int c = cl_scope_lex();
        if(c == 0){ // EOF?
            className.clear();
            break;
        }
        
        if(c == LE_MACRO) {
            continue;
            
        } else if(c == LE_IDENTIFIER) {
            className = cl_scope_text;
        
        } else if(c == LE_DECLSPEC && className.empty()) {
            // found decl sepc
            
            // Next token is '('
            NEXT_TOK();
            BREAK_IF_NOT('(');
            
            // Next token is LE_DLLIMPORT or LE_DLLEXPORT
            NEXT_TOK();
            BREAK_IF_NOT2(LE_DLLIEXPORT, LE_DLLIMPORT);
            
            // Next token should be closing brace
            NEXT_TOK();
            BREAK_IF_NOT(')');
            
        } else if( (c == '{') && (!className.empty()) ){
            // The following is the class content
            break;
            
        } else if( c == ':' && !className.empty() ) {
            // we got the class name, and we found ':'
            // read all tokens up until the first open brace
            while (true) {
                NEXT_TOK();
                if( c == (int)'{') {
                    return;
                }
            }
        } else {
            className.clear();
            break;
            
        }
    }
}

/**
 * consume all token until matching closing brace is found
 */
void consumeDecl()
{
    int depth = 1;
    while(depth > 0)
    {
        int ch = cl_scope_lex();
        if(ch ==0)
        {
            break;
        }
        if(ch == '}')
        {
            depth--;
            if(depth == 0) currentScope.pop_back();//reduce the scope
            continue;
        }
        else if(ch == '{')
        {
            depth ++ ;
            continue;
        }
    }

}

void consumeTemplateDecl()
{
    templateInitList.clear();
    int dep = 0;
    while( true ){
        int c = cl_scope_lex();
        if(c == 0){ // EOF?
            break;
        }

        if(c == '>' && dep == 0){
            templateInitList += cl_scope_text;
            break;
            
        } else {
            templateInitList += cl_scope_text;
            templateInitList += " ";
        }
        
        switch(c) {
        case (int)'<':
            dep++;
            break;
        case (int)'>':
            dep--;
            break;
        default:
            break;
        }
    }
    
    if(templateInitList.empty() == false)
        templateInitList.insert(0, "<");
}

std::string readInitializer(const char* delim)
{
    std::string intializer;
    int dep = 0;
    while( true ){
        int c = cl_scope_lex();
        if(c == 0){ // EOF?
            break;
        }
        
        if(strchr(delim, (char)c) && dep == 0){
            cl_scope_less(0);
            break;
            
        } else {
            intializer += cl_scope_text;
            intializer += " ";
        }
        
        switch(c) {
        case (int)'<':
            dep++;
            break;
        case (int)'>':
            dep--;
            break;
        default:
            break;
        }
    }
    return intializer;
}
//swallow all tokens up to the first '{'
void consumeNotIncluding(int ch){
    while( true ){
        int c = cl_scope_lex();
        if(c == 0){ // EOF?
            break;
        }

        //keep the function signature
        if(c == ch){
            cl_scope_less(0);
            break;
        }
    }
}

// return the scope name at the end of the input string
std::string get_scope_name(	const std::string &in,
                            std::vector<std::string> &additionalNS,
                            const std::map<std::string, std::string> &ignoreTokens)
{
    if( !setLexerInput(in, ignoreTokens) ){
        return "";
    }

    //call tghe main parsing routine
    cl_scope_parse();
    std::string scope = getCurrentScope();
    //do the lexer cleanup
    cl_scope_lex_clean();

    for(size_t i=0; i<gs_additionlNS.size(); i++){
        additionalNS.push_back(gs_additionlNS.at(i));
    }
    gs_additionlNS.clear();
    return scope;
}