source: src/Parser/parser.yy@ fb114fa1

ADT aaron-thesis arm-eh ast-experimental cleanup-dtors deferred_resn demangler enum forall-pointer-decay jacob/cs343-translation jenkins-sandbox new-ast new-ast-unique-expr new-env no_list persistent-indexer pthread-emulation qualifiedEnum resolv-new with_gc
Last change on this file since fb114fa1 was 9c23f31, checked in by Peter A. Buhr <pabuhr@…>, 9 years ago

fix conflicts

  • Property mode set to 100644
File size: 103.6 KB
Line 
1//
2// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
3//
4// The contents of this file are covered under the licence agreement in the
5// file "LICENCE" distributed with Cforall.
6//
7// cfa.y --
8//
9// Author : Peter A. Buhr
10// Created On : Sat Sep 1 20:22:55 2001
11// Last Modified By : Peter A. Buhr
12// Last Modified On : Sat Sep 24 12:16:53 2016
13// Update Count : 1992
14//
15
16// This grammar is based on the ANSI99/11 C grammar, specifically parts of EXPRESSION and STATEMENTS, and on the C
17// grammar by James A. Roskind, specifically parts of DECLARATIONS and EXTERNAL DEFINITIONS. While parts have been
18// copied, important changes have been made in all sections; these changes are sufficient to constitute a new grammar.
19// In particular, this grammar attempts to be more syntactically precise, i.e., it parses less incorrect language syntax
20// that must be subsequently rejected by semantic checks. Nevertheless, there are still several semantic checks
21// required and many are noted in the grammar. Finally, the grammar is extended with GCC and CFA language extensions.
22
23// Acknowledgments to Richard Bilson, Glen Ditchfield, and Rodolfo Gabriel Esteves who all helped when I got stuck with
24// the grammar.
25
26// The root language for this grammar is ANSI99/11 C. All of ANSI99/11 is parsed, except for:
27//
28// 1. designation with '=' (use ':' instead)
29//
30// Most of the syntactic extensions from ANSI90 to ANSI11 C are marked with the comment "C99/C11". This grammar also has
31// two levels of extensions. The first extensions cover most of the GCC C extensions, except for:
32//
33// 1. designation with and without '=' (use ':' instead)
34// 2. attributes not allowed in parenthesis of declarator
35//
36// All of the syntactic extensions for GCC C are marked with the comment "GCC". The second extensions are for Cforall
37// (CFA), which fixes several of C's outstanding problems and extends C with many modern language concepts. All of the
38// syntactic extensions for CFA C are marked with the comment "CFA". As noted above, there is one unreconcileable
39// parsing problem between C99 and CFA with respect to designators; this is discussed in detail before the "designation"
40// grammar rule.
41
42%{
43#define YYDEBUG_LEXER_TEXT (yylval) // lexer loads this up each time
44#define YYDEBUG 1 // get the pretty debugging code to compile
45
46#undef __GNUC_MINOR__
47
48#include <cstdio>
49#include <stack>
50#include "lex.h"
51#include "parser.h"
52#include "ParseNode.h"
53#include "TypedefTable.h"
54#include "TypeData.h"
55#include "LinkageSpec.h"
56using namespace std;
57
58extern DeclarationNode * parseTree;
59extern LinkageSpec::Spec linkage;
60extern TypedefTable typedefTable;
61
62stack< LinkageSpec::Spec > linkageStack;
63
64void appendStr( string *to, string *from ) {
65 // "abc" "def" "ghi" => "abcdefghi", remove new text from quotes and insert before last quote in old string.
66 to->insert( to->length() - 1, from->substr( 1, from->length() - 2 ) );
67} // appendStr
68%}
69
70//************************* TERMINAL TOKENS ********************************
71
72// keywords
73%token TYPEDEF
74%token AUTO EXTERN REGISTER STATIC
75%token INLINE // C99
76%token FORTRAN // C99, extension ISO/IEC 9899:1999 Section J.5.9(1)
77%token CONST VOLATILE
78%token RESTRICT // C99
79%token FORALL LVALUE // CFA
80%token VOID CHAR SHORT INT LONG FLOAT DOUBLE SIGNED UNSIGNED
81%token VALIST // GCC
82%token BOOL COMPLEX IMAGINARY // C99
83%token TYPEOF LABEL // GCC
84%token ENUM STRUCT UNION
85%token OTYPE FTYPE DTYPE TRAIT // CFA
86%token SIZEOF OFFSETOF
87%token ATTRIBUTE EXTENSION // GCC
88%token IF ELSE SWITCH CASE DEFAULT DO WHILE FOR BREAK CONTINUE GOTO RETURN
89%token CHOOSE DISABLE ENABLE FALLTHRU TRY CATCH CATCHRESUME FINALLY THROW THROWRESUME AT // CFA
90%token ASM // C99, extension ISO/IEC 9899:1999 Section J.5.10(1)
91%token ALIGNAS ALIGNOF ATOMIC GENERIC NORETURN STATICASSERT THREADLOCAL // C11
92
93// names and constants: lexer differentiates between identifier and typedef names
94%token<tok> IDENTIFIER QUOTED_IDENTIFIER TYPEDEFname TYPEGENname
95%token<tok> ATTR_IDENTIFIER ATTR_TYPEDEFname ATTR_TYPEGENname
96%token<tok> INTEGERconstant FLOATINGconstant CHARACTERconstant STRINGliteral
97%token<tok> ZERO ONE // CFA
98
99// multi-character operators
100%token ARROW // ->
101%token ICR DECR // ++ --
102%token LS RS // << >>
103%token LE GE EQ NE // <= >= == !=
104%token ANDAND OROR // && ||
105%token ELLIPSIS // ...
106
107%token MULTassign DIVassign MODassign // *= /= %=/
108%token PLUSassign MINUSassign // += -=
109%token LSassign RSassign // <<= >>=
110%token ANDassign ERassign ORassign // &= ^= |=
111
112%token ATassign // @=
113
114// Types declaration
115%union
116{
117 Token tok;
118 ParseNode *pn;
119 ExpressionNode *en;
120 DeclarationNode *decl;
121 DeclarationNode::Aggregate aggKey;
122 DeclarationNode::TypeClass tclass;
123 StatementNode *sn;
124 ConstantExpr *constant;
125 ForCtl *fctl;
126 LabelNode *label;
127 InitializerNode *in;
128 OperKinds op;
129 std::string *str;
130 bool flag;
131}
132
133%type<tok> identifier no_01_identifier no_attr_identifier zero_one
134%type<tok> identifier_or_type_name no_attr_identifier_or_type_name no_01_identifier_or_type_name
135%type<constant> string_literal
136%type<str> string_literal_list
137
138// expressions
139%type<en> constant
140%type<en> tuple tuple_expression_list
141%type<op> ptrref_operator unary_operator assignment_operator
142%type<en> primary_expression postfix_expression unary_expression
143%type<en> cast_expression multiplicative_expression additive_expression shift_expression
144%type<en> relational_expression equality_expression AND_expression exclusive_OR_expression
145%type<en> inclusive_OR_expression logical_AND_expression logical_OR_expression conditional_expression
146%type<en> constant_expression assignment_expression assignment_expression_opt
147%type<en> comma_expression comma_expression_opt
148%type<en> argument_expression_list argument_expression assignment_opt
149%type<fctl> for_control_expression
150%type<en> subrange
151%type<en> asm_operands_opt asm_operands_list asm_operand
152%type<label> label_list
153%type<en> asm_clobbers_list_opt
154%type<flag> asm_volatile_opt
155
156// statements
157%type<sn> labeled_statement compound_statement expression_statement selection_statement
158%type<sn> iteration_statement jump_statement exception_statement asm_statement
159%type<sn> fall_through_opt fall_through
160%type<sn> statement statement_list
161%type<sn> block_item_list block_item
162%type<sn> case_clause
163%type<en> case_value
164%type<sn> case_value_list case_label case_label_list
165%type<sn> switch_clause_list_opt switch_clause_list choose_clause_list_opt choose_clause_list
166%type<sn> handler_list handler_clause finally_clause
167
168// declarations
169%type<decl> abstract_array abstract_declarator abstract_function abstract_parameter_array
170%type<decl> abstract_parameter_declaration abstract_parameter_declarator abstract_parameter_function
171%type<decl> abstract_parameter_ptr abstract_ptr
172
173%type<aggKey> aggregate_key
174%type<decl> aggregate_name
175
176%type<decl> array_dimension array_parameter_1st_dimension array_parameter_dimension multi_array_dimension
177
178%type<decl> assertion assertion_list_opt
179
180%type<en> bit_subrange_size_opt bit_subrange_size
181
182%type<decl> basic_declaration_specifier basic_type_name basic_type_specifier direct_type_name indirect_type_name
183
184%type<decl> trait_declaration trait_declaration_list trait_declaring_list trait_specifier
185
186%type<decl> declaration declaration_list declaration_list_opt declaration_qualifier_list
187%type<decl> declaration_specifier declarator declaring_list
188
189%type<decl> elaborated_type_name
190
191%type<decl> enumerator_list enum_name
192%type<en> enumerator_value_opt
193
194%type<decl> exception_declaration external_definition external_definition_list external_definition_list_opt
195
196%type<decl> field_declaration field_declaration_list field_declarator field_declaring_list
197%type<en> field field_list
198
199%type<decl> external_function_definition function_definition function_array function_declarator function_no_ptr function_ptr
200
201%type<decl> identifier_parameter_array identifier_parameter_declarator identifier_parameter_function
202%type<decl> identifier_parameter_ptr identifier_list
203
204%type<decl> new_abstract_array new_abstract_declarator_no_tuple new_abstract_declarator_tuple
205%type<decl> new_abstract_function new_abstract_parameter_declaration new_abstract_parameter_list
206%type<decl> new_abstract_ptr new_abstract_tuple
207
208%type<decl> new_array_parameter_1st_dimension
209
210%type<decl> new_trait_declaring_list new_declaration new_field_declaring_list
211%type<decl> new_function_declaration new_function_return new_function_specifier
212
213%type<decl> new_identifier_parameter_array new_identifier_parameter_declarator_no_tuple
214%type<decl> new_identifier_parameter_declarator_tuple new_identifier_parameter_ptr
215
216%type<decl> new_parameter_declaration new_parameter_list new_parameter_type_list new_parameter_type_list_opt
217
218%type<decl> new_typedef_declaration new_variable_declaration new_variable_specifier
219
220%type<decl> old_declaration old_declaration_list old_declaration_list_opt old_function_array
221%type<decl> old_function_declarator old_function_no_ptr old_function_ptr
222
223%type<decl> parameter_declaration parameter_list parameter_type_list
224%type<decl> parameter_type_list_opt
225
226%type<decl> paren_identifier paren_type
227
228%type<decl> storage_class storage_class_list
229
230%type<decl> sue_declaration_specifier sue_type_specifier
231
232%type<tclass> type_class
233%type<decl> type_declarator type_declarator_name type_declaring_list
234
235%type<decl> typedef type_array typedef_declaration typedef_declaration_specifier typedef_expression
236%type<decl> type_function type_parameter_array type_parameter_function type_parameter_ptr
237%type<decl> type_parameter_redeclarator type_ptr variable_type_redeclarator typedef_type_specifier
238%type<decl> typegen_declaration_specifier typegen_type_specifier typegen_name
239
240%type<decl> type_name type_name_no_function
241%type<decl> type_parameter type_parameter_list
242
243%type<en> type_name_list
244
245%type<decl> type_qualifier type_qualifier_name type_qualifier_list type_qualifier_list_opt type_specifier
246
247%type<decl> variable_abstract_array variable_abstract_declarator variable_abstract_function
248%type<decl> variable_abstract_ptr variable_array variable_declarator variable_function variable_ptr
249
250%type<decl> attribute_list_opt attribute_list attribute
251
252// initializers
253%type<in> initializer initializer_list initializer_opt
254
255// designators
256%type<en> designator designator_list designation
257
258
259// Handle single shift/reduce conflict for dangling else by shifting the ELSE token. For example, this string
260// is ambiguous:
261// .---------. matches IF '(' comma_expression ')' statement
262// if ( C ) S1 else S2
263// `-----------------' matches IF '(' comma_expression ')' statement ELSE statement */
264
265%nonassoc THEN // rule precedence for IF '(' comma_expression ')' statement
266%nonassoc ELSE // token precedence for start of else clause in IF statement
267
268%start translation_unit // parse-tree root
269
270%%
271//************************* Namespace Management ********************************
272
273// The grammar in the ANSI C standard is not strictly context-free, since it relies upon the distinct terminal symbols
274// "identifier" and "TYPEDEFname" that are lexically identical. While it is possible to write a purely context-free
275// grammar, such a grammar would obscure the relationship between syntactic and semantic constructs. Hence, this
276// grammar uses the ANSI style.
277//
278// Cforall compounds this problem by introducing type names local to the scope of a declaration (for instance, those
279// introduced through "forall" qualifiers), and by introducing "type generators" -- parametrized types. This latter
280// type name creates a third class of identifiers that must be distinguished by the scanner.
281//
282// Since the scanner cannot distinguish among the different classes of identifiers without some context information, it
283// accesses a data structure (the TypedefTable) to allow classification of an identifier that it has just read.
284// Semantic actions during the parser update this data structure when the class of identifiers change.
285//
286// Because the Cforall language is block-scoped, there is the possibility that an identifier can change its class in a
287// local scope; it must revert to its original class at the end of the block. Since type names can be local to a
288// particular declaration, each declaration is itself a scope. This requires distinguishing between type names that are
289// local to the current declaration scope and those that persist past the end of the declaration (i.e., names defined in
290// "typedef" or "type" declarations).
291//
292// The non-terminals "push" and "pop" derive the empty string; their only use is to denote the opening and closing of
293// scopes. Every push must have a matching pop, although it is regrettable the matching pairs do not always occur
294// within the same rule. These non-terminals may appear in more contexts than strictly necessary from a semantic point
295// of view. Unfortunately, these extra rules are necessary to prevent parsing conflicts -- the parser may not have
296// enough context and look-ahead information to decide whether a new scope is necessary, so the effect of these extra
297// rules is to open a new scope unconditionally. As the grammar evolves, it may be neccesary to add or move around
298// "push" and "pop" nonterminals to resolve conflicts of this sort.
299
300push:
301 { typedefTable.enterScope(); }
302 ;
303
304pop:
305 { typedefTable.leaveScope(); }
306 ;
307
308//************************* CONSTANTS ********************************
309
310constant:
311 // ENUMERATIONconstant is not included here; it is treated as a variable with type "enumeration constant".
312 INTEGERconstant { $$ = new ExpressionNode( build_constantInteger( *$1 ) ); }
313 | FLOATINGconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); }
314 | CHARACTERconstant { $$ = new ExpressionNode( build_constantChar( *$1 ) ); }
315 ;
316
317identifier:
318 IDENTIFIER
319 | ATTR_IDENTIFIER // CFA
320 | zero_one // CFA
321 ;
322
323no_01_identifier:
324 IDENTIFIER
325 | ATTR_IDENTIFIER // CFA
326 ;
327
328no_attr_identifier:
329 IDENTIFIER
330 | zero_one // CFA
331 ;
332
333zero_one: // CFA
334 ZERO
335 | ONE
336 ;
337
338string_literal:
339 string_literal_list { $$ = build_constantStr( *$1 ); }
340 ;
341
342string_literal_list: // juxtaposed strings are concatenated
343 STRINGliteral { $$ = $1; } // conversion from tok to str
344 | string_literal_list STRINGliteral
345 {
346 appendStr( $1, $2 ); // append 2nd juxtaposed string to 1st
347 delete $2; // allocated by lexer
348 $$ = $1; // conversion from tok to str
349 }
350 ;
351
352//************************* EXPRESSIONS ********************************
353
354primary_expression:
355 IDENTIFIER // typedef name cannot be used as a variable name
356 { $$ = new ExpressionNode( build_varref( $1 ) ); }
357 | zero_one
358 { $$ = new ExpressionNode( build_varref( $1 ) ); }
359 | '(' comma_expression ')'
360 { $$ = $2; }
361 | '(' compound_statement ')' // GCC, lambda expression
362 { $$ = new ExpressionNode( build_valexpr( $2 ) ); }
363 ;
364
365postfix_expression:
366 primary_expression
367 | postfix_expression '[' push assignment_expression pop ']'
368 // CFA, comma_expression disallowed in this context because it results in a common user error: subscripting a
369 // matrix with x[i,j] instead of x[i][j]. While this change is not backwards compatible, there seems to be
370 // little advantage to this feature and many disadvantages. It is possible to write x[(i,j)] in CFA, which is
371 // equivalent to the old x[i,j].
372 { $$ = new ExpressionNode( build_binary_val( OperKinds::Index, $1, $4 ) ); }
373 | postfix_expression '(' argument_expression_list ')'
374 { $$ = new ExpressionNode( build_func( $1, $3 ) ); }
375 // ambiguity with .0 so space required after field-selection, e.g.
376 // struct S { int 0, 1; } s; s. 0 = 0; s. 1 = 1;
377 | postfix_expression '.' no_attr_identifier
378 { $$ = new ExpressionNode( build_fieldSel( $1, build_varref( $3 ) ) ); }
379 | postfix_expression '.' '[' push field_list pop ']' // CFA, tuple field selector
380 | postfix_expression ARROW no_attr_identifier
381 { $$ = new ExpressionNode( build_pfieldSel( $1, build_varref( $3 ) ) ); }
382 | postfix_expression ARROW '[' push field_list pop ']' // CFA, tuple field selector
383 | postfix_expression ICR
384 { $$ = new ExpressionNode( build_unary_ptr( OperKinds::IncrPost, $1 ) ); }
385 | postfix_expression DECR
386 { $$ = new ExpressionNode( build_unary_ptr( OperKinds::DecrPost, $1 ) ); }
387 | '(' type_name_no_function ')' '{' initializer_list comma_opt '}' // C99
388 { $$ = new ExpressionNode( build_compoundLiteral( $2, new InitializerNode( $5, true ) ) ); }
389 | postfix_expression '{' argument_expression_list '}' // CFA
390 {
391 Token fn;
392 fn.str = new std::string( "?{}" ); // location undefined - use location of '{'?
393 $$ = new ExpressionNode( new ConstructorExpr( build_func( new ExpressionNode( build_varref( fn ) ), (ExpressionNode *)( $1 )->set_last( $3 ) ) ) );
394 }
395 ;
396
397argument_expression_list:
398 argument_expression
399 | argument_expression_list ',' argument_expression
400 { $$ = (ExpressionNode *)( $1->set_last( $3 )); }
401 ;
402
403argument_expression:
404 // empty
405 { $$ = 0; } // use default argument
406 | assignment_expression
407 ;
408
409field_list: // CFA, tuple field selector
410 field
411 | field_list ',' field { $$ = (ExpressionNode *)$1->set_last( $3 ); }
412 ;
413
414field: // CFA, tuple field selector
415 no_attr_identifier
416 { $$ = new ExpressionNode( build_varref( $1 ) ); }
417 // ambiguity with .0 so space required after field-selection, e.g.
418 // struct S { int 0, 1; } s; s. 0 = 0; s. 1 = 1;
419 | no_attr_identifier '.' field
420 { $$ = new ExpressionNode( build_fieldSel( $3, build_varref( $1 ) ) ); }
421 | no_attr_identifier '.' '[' push field_list pop ']'
422 { $$ = new ExpressionNode( build_fieldSel( $5, build_varref( $1 ) ) ); }
423 | no_attr_identifier ARROW field
424 { $$ = new ExpressionNode( build_pfieldSel( $3, build_varref( $1 ) ) ); }
425 | no_attr_identifier ARROW '[' push field_list pop ']'
426 { $$ = new ExpressionNode( build_pfieldSel( $5, build_varref( $1 ) ) ); }
427 ;
428
429unary_expression:
430 postfix_expression
431 // first location where constant/string can have operator applied: sizeof 3/sizeof "abc" still requires
432 // semantics checks, e.g., ++3, 3--, *3, &&3
433 | constant
434 { $$ = $1; }
435 | string_literal
436 { $$ = new ExpressionNode( $1 ); }
437 | EXTENSION cast_expression // GCC
438 { $$ = $2->set_extension( true ); }
439 // '*' ('&') is separated from unary_operator because of shift/reduce conflict in:
440 // { * X; } // dereference X
441 // { * int X; } // CFA declaration of pointer to int
442 | ptrref_operator cast_expression // CFA
443 {
444 switch ( $1 ) {
445 case OperKinds::AddressOf:
446 $$ = new ExpressionNode( build_addressOf( $2 ) );
447 break;
448 case OperKinds::PointTo:
449 $$ = new ExpressionNode( build_unary_val( $1, $2 ) );
450 break;
451 default:
452 assert( false );
453 }
454 }
455 | unary_operator cast_expression
456 { $$ = new ExpressionNode( build_unary_val( $1, $2 ) ); }
457 | ICR unary_expression
458 { $$ = new ExpressionNode( build_unary_ptr( OperKinds::Incr, $2 ) ); }
459 | DECR unary_expression
460 { $$ = new ExpressionNode( build_unary_ptr( OperKinds::Decr, $2 ) ); }
461 | SIZEOF unary_expression
462 { $$ = new ExpressionNode( build_sizeOfexpr( $2 ) ); }
463 | SIZEOF '(' type_name_no_function ')'
464 { $$ = new ExpressionNode( build_sizeOftype( $3 ) ); }
465 | ALIGNOF unary_expression // GCC, variable alignment
466 { $$ = new ExpressionNode( build_alignOfexpr( $2 ) ); }
467 | ALIGNOF '(' type_name_no_function ')' // GCC, type alignment
468 { $$ = new ExpressionNode( build_alignOftype( $3 ) ); }
469 | OFFSETOF '(' type_name_no_function ',' no_attr_identifier ')'
470 { $$ = new ExpressionNode( build_offsetOf( $3, build_varref( $5 ) ) ); }
471 | ATTR_IDENTIFIER
472 { $$ = new ExpressionNode( build_attrexpr( build_varref( $1 ), nullptr ) ); }
473 | ATTR_IDENTIFIER '(' argument_expression ')'
474 { $$ = new ExpressionNode( build_attrexpr( build_varref( $1 ), $3 ) ); }
475 | ATTR_IDENTIFIER '(' type_name ')'
476 { $$ = new ExpressionNode( build_attrtype( build_varref( $1 ), $3 ) ); }
477// | ANDAND IDENTIFIER // GCC, address of label
478// { $$ = new ExpressionNode( new OperatorNode( OperKinds::LabelAddress ), new ExpressionNode( build_varref( $2, true ) ); }
479 ;
480
481ptrref_operator:
482 '*' { $$ = OperKinds::PointTo; }
483 | '&' { $$ = OperKinds::AddressOf; }
484 // GCC, address of label must be handled by semantic check for ref,ref,label
485// | ANDAND { $$ = OperKinds::And; }
486 ;
487
488unary_operator:
489 '+' { $$ = OperKinds::UnPlus; }
490 | '-' { $$ = OperKinds::UnMinus; }
491 | '!' { $$ = OperKinds::Neg; }
492 | '~' { $$ = OperKinds::BitNeg; }
493 ;
494
495cast_expression:
496 unary_expression
497 | '(' type_name_no_function ')' cast_expression
498 { $$ = new ExpressionNode( build_cast( $2, $4 ) ); }
499 | '(' type_name_no_function ')' tuple
500 { $$ = new ExpressionNode( build_cast( $2, $4 ) ); }
501 ;
502
503multiplicative_expression:
504 cast_expression
505 | multiplicative_expression '*' cast_expression
506 { $$ = new ExpressionNode( build_binary_val( OperKinds::Mul, $1, $3 ) ); }
507 | multiplicative_expression '/' cast_expression
508 { $$ = new ExpressionNode( build_binary_val( OperKinds::Div, $1, $3 ) ); }
509 | multiplicative_expression '%' cast_expression
510 { $$ = new ExpressionNode( build_binary_val( OperKinds::Mod, $1, $3 ) ); }
511 ;
512
513additive_expression:
514 multiplicative_expression
515 | additive_expression '+' multiplicative_expression
516 { $$ = new ExpressionNode( build_binary_val( OperKinds::Plus, $1, $3 ) ); }
517 | additive_expression '-' multiplicative_expression
518 { $$ = new ExpressionNode( build_binary_val( OperKinds::Minus, $1, $3 ) ); }
519 ;
520
521shift_expression:
522 additive_expression
523 | shift_expression LS additive_expression
524 { $$ = new ExpressionNode( build_binary_val( OperKinds::LShift, $1, $3 ) ); }
525 | shift_expression RS additive_expression
526 { $$ = new ExpressionNode( build_binary_val( OperKinds::RShift, $1, $3 ) ); }
527 ;
528
529relational_expression:
530 shift_expression
531 | relational_expression '<' shift_expression
532 { $$ = new ExpressionNode( build_binary_val( OperKinds::LThan, $1, $3 ) ); }
533 | relational_expression '>' shift_expression
534 { $$ = new ExpressionNode( build_binary_val( OperKinds::GThan, $1, $3 ) ); }
535 | relational_expression LE shift_expression
536 { $$ = new ExpressionNode( build_binary_val( OperKinds::LEThan, $1, $3 ) ); }
537 | relational_expression GE shift_expression
538 { $$ = new ExpressionNode( build_binary_val( OperKinds::GEThan, $1, $3 ) ); }
539 ;
540
541equality_expression:
542 relational_expression
543 | equality_expression EQ relational_expression
544 { $$ = new ExpressionNode( build_binary_val( OperKinds::Eq, $1, $3 ) ); }
545 | equality_expression NE relational_expression
546 { $$ = new ExpressionNode( build_binary_val( OperKinds::Neq, $1, $3 ) ); }
547 ;
548
549AND_expression:
550 equality_expression
551 | AND_expression '&' equality_expression
552 { $$ = new ExpressionNode( build_binary_val( OperKinds::BitAnd, $1, $3 ) ); }
553 ;
554
555exclusive_OR_expression:
556 AND_expression
557 | exclusive_OR_expression '^' AND_expression
558 { $$ = new ExpressionNode( build_binary_val( OperKinds::Xor, $1, $3 ) ); }
559 ;
560
561inclusive_OR_expression:
562 exclusive_OR_expression
563 | inclusive_OR_expression '|' exclusive_OR_expression
564 { $$ = new ExpressionNode( build_binary_val( OperKinds::BitOr, $1, $3 ) ); }
565 ;
566
567logical_AND_expression:
568 inclusive_OR_expression
569 | logical_AND_expression ANDAND inclusive_OR_expression
570 { $$ = new ExpressionNode( build_and_or( $1, $3, true ) ); }
571 ;
572
573logical_OR_expression:
574 logical_AND_expression
575 | logical_OR_expression OROR logical_AND_expression
576 { $$ = new ExpressionNode( build_and_or( $1, $3, false ) ); }
577 ;
578
579conditional_expression:
580 logical_OR_expression
581 | logical_OR_expression '?' comma_expression ':' conditional_expression
582 { $$ = new ExpressionNode( build_cond( $1, $3, $5 ) ); }
583 // FIX ME: this hack computes $1 twice
584 | logical_OR_expression '?' /* empty */ ':' conditional_expression // GCC, omitted first operand
585 { $$ = new ExpressionNode( build_cond( $1, $1, $4 ) ); }
586 | logical_OR_expression '?' comma_expression ':' tuple // CFA, tuple expression
587 { $$ = new ExpressionNode( build_cond( $1, $3, $5 ) ); }
588 ;
589
590constant_expression:
591 conditional_expression
592 ;
593
594assignment_expression:
595 // CFA, assignment is separated from assignment_operator to ensure no assignment operations for tuples
596 conditional_expression
597 | unary_expression assignment_operator assignment_expression
598 { $$ = new ExpressionNode( build_binary_ptr( $2, $1, $3 ) ); }
599 | tuple assignment_opt // CFA, tuple expression
600 { $$ = ( $2 == 0 ) ? $1 : new ExpressionNode( build_binary_ptr( OperKinds::Assign, $1, $2 ) ); }
601 ;
602
603assignment_expression_opt:
604 // empty
605 { $$ = nullptr; }
606 | assignment_expression
607 ;
608
609assignment_operator:
610 '=' { $$ = OperKinds::Assign; }
611 | ATassign { $$ = OperKinds::AtAssn; }
612 | MULTassign { $$ = OperKinds::MulAssn; }
613 | DIVassign { $$ = OperKinds::DivAssn; }
614 | MODassign { $$ = OperKinds::ModAssn; }
615 | PLUSassign { $$ = OperKinds::PlusAssn; }
616 | MINUSassign { $$ = OperKinds::MinusAssn; }
617 | LSassign { $$ = OperKinds::LSAssn; }
618 | RSassign { $$ = OperKinds::RSAssn; }
619 | ANDassign { $$ = OperKinds::AndAssn; }
620 | ERassign { $$ = OperKinds::ERAssn; }
621 | ORassign { $$ = OperKinds::OrAssn; }
622 ;
623
624tuple: // CFA, tuple
625 // CFA, one assignment_expression is factored out of comma_expression to eliminate a shift/reduce conflict with
626 // comma_expression in new_identifier_parameter_array and new_abstract_array
627 '[' ']'
628 { $$ = new ExpressionNode( build_tuple() ); }
629 | '[' push assignment_expression pop ']'
630 { $$ = new ExpressionNode( build_tuple( $3 ) ); }
631 | '[' push ',' tuple_expression_list pop ']'
632 { $$ = new ExpressionNode( build_tuple( (ExpressionNode *)(new ExpressionNode( nullptr ) )->set_last( $4 ) ) ); }
633 | '[' push assignment_expression ',' tuple_expression_list pop ']'
634 { $$ = new ExpressionNode( build_tuple( (ExpressionNode *)$3->set_last( $5 ) ) ); }
635 ;
636
637tuple_expression_list:
638 assignment_expression_opt
639 | tuple_expression_list ',' assignment_expression_opt
640 { $$ = (ExpressionNode *)$1->set_last( $3 ); }
641 ;
642
643comma_expression:
644 assignment_expression
645 | comma_expression ',' assignment_expression
646 { $$ = new ExpressionNode( build_comma( $1, $3 ) ); }
647 ;
648
649comma_expression_opt:
650 // empty
651 { $$ = 0; }
652 | comma_expression
653 ;
654
655//*************************** STATEMENTS *******************************
656
657statement:
658 labeled_statement
659 | compound_statement
660 | expression_statement { $$ = $1; }
661 | selection_statement
662 | iteration_statement
663 | jump_statement
664 | exception_statement
665 | asm_statement
666 | '^' postfix_expression '{' argument_expression_list '}' ';' // CFA
667 {
668 Token fn;
669 fn.str = new string( "^?{}" ); // location undefined
670 $$ = new StatementNode( build_expr( new ExpressionNode( build_func( new ExpressionNode( build_varref( fn ) ), (ExpressionNode *)( $2 )->set_last( $4 ) ) ) ) );
671 }
672 ;
673
674labeled_statement:
675 // labels cannot be identifiers 0 or 1
676 IDENTIFIER ':' attribute_list_opt statement
677 {
678 $$ = $4->add_label( $1 );
679 }
680 ;
681
682compound_statement:
683 '{' '}'
684 { $$ = new StatementNode( build_compound( (StatementNode *)0 ) ); }
685 | '{'
686 // Two scopes are necessary because the block itself has a scope, but every declaration within the block also
687 // requires its own scope
688 push push
689 local_label_declaration_opt // GCC, local labels
690 block_item_list pop '}' // C99, intermix declarations and statements
691 { $$ = new StatementNode( build_compound( $5 ) ); }
692 ;
693
694block_item_list: // C99
695 block_item
696 | block_item_list push block_item
697 { if ( $1 != 0 ) { $1->set_last( $3 ); $$ = $1; } }
698 ;
699
700block_item:
701 declaration // CFA, new & old style declarations
702 { $$ = new StatementNode( $1 ); }
703 | EXTENSION declaration // GCC
704 { // mark all fields in list
705 for ( DeclarationNode *iter = $2; iter != nullptr; iter = (DeclarationNode *)iter->get_next() )
706 iter->set_extension( true );
707 $$ = new StatementNode( $2 );
708 }
709 | function_definition
710 { $$ = new StatementNode( $1 ); }
711 | statement pop
712 ;
713
714statement_list:
715 statement
716 | statement_list statement
717 { if ( $1 != 0 ) { $1->set_last( $2 ); $$ = $1; } }
718 ;
719
720expression_statement:
721 comma_expression_opt ';'
722 { $$ = new StatementNode( build_expr( $1 ) ); }
723 ;
724
725selection_statement:
726 IF '(' comma_expression ')' statement %prec THEN
727 // explicitly deal with the shift/reduce conflict on if/else
728 { $$ = new StatementNode( build_if( $3, $5, nullptr ) ); }
729 | IF '(' comma_expression ')' statement ELSE statement
730 { $$ = new StatementNode( build_if( $3, $5, $7 ) ); }
731 | SWITCH '(' comma_expression ')' case_clause // CFA
732 { $$ = new StatementNode( build_switch( $3, $5 ) ); }
733 | SWITCH '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt '}' // CFA
734 {
735 StatementNode *sw = new StatementNode( build_switch( $3, $8 ) );
736 // The semantics of the declaration list is changed to include associated initialization, which is performed
737 // *before* the transfer to the appropriate case clause by hoisting the declarations into a compound
738 // statement around the switch. Statements after the initial declaration list can never be executed, and
739 // therefore, are removed from the grammar even though C allows it. The change also applies to choose
740 // statement.
741 $$ = $7 != 0 ? new StatementNode( build_compound( (StatementNode *)((new StatementNode( $7 ))->set_last( sw )) ) ) : sw;
742 }
743 | CHOOSE '(' comma_expression ')' case_clause // CFA
744 { $$ = new StatementNode( build_switch( $3, $5 ) ); }
745 | CHOOSE '(' comma_expression ')' '{' push declaration_list_opt choose_clause_list_opt '}' // CFA
746 {
747 StatementNode *sw = new StatementNode( build_switch( $3, $8 ) );
748 $$ = $7 != 0 ? new StatementNode( build_compound( (StatementNode *)((new StatementNode( $7 ))->set_last( sw )) ) ) : sw;
749 }
750 ;
751
752// CASE and DEFAULT clauses are only allowed in the SWITCH statement, precluding Duff's device. In addition, a case
753// clause allows a list of values and subranges.
754
755case_value: // CFA
756 constant_expression { $$ = $1; }
757 | constant_expression ELLIPSIS constant_expression // GCC, subrange
758 { $$ = new ExpressionNode( build_range( $1, $3 ) ); }
759 | subrange // CFA, subrange
760 ;
761
762case_value_list: // CFA
763 case_value { $$ = new StatementNode( build_case( $1 ) ); }
764 // convert case list, e.g., "case 1, 3, 5:" into "case 1: case 3: case 5"
765 | case_value_list ',' case_value { $$ = (StatementNode *)($1->set_last( new StatementNode( build_case( $3 ) ) ) ); }
766 ;
767
768case_label: // CFA
769 CASE case_value_list ':' { $$ = $2; }
770 | DEFAULT ':' { $$ = new StatementNode( build_default() ); }
771 // A semantic check is required to ensure only one default clause per switch/choose statement.
772 ;
773
774case_label_list: // CFA
775 case_label
776 | case_label_list case_label { $$ = (StatementNode *)( $1->set_last( $2 )); }
777 ;
778
779case_clause: // CFA
780 case_label_list statement { $$ = $1->append_last_case( new StatementNode( build_compound( $2 ) ) ); }
781 ;
782
783switch_clause_list_opt: // CFA
784 // empty
785 { $$ = 0; }
786 | switch_clause_list
787 ;
788
789switch_clause_list: // CFA
790 case_label_list statement_list
791 { $$ = $1->append_last_case( new StatementNode( build_compound( $2 ) ) ); }
792 | switch_clause_list case_label_list statement_list
793 { $$ = (StatementNode *)( $1->set_last( $2->append_last_case( new StatementNode( build_compound( $3 ) ) ) ) ); }
794 ;
795
796choose_clause_list_opt: // CFA
797 // empty
798 { $$ = 0; }
799 | choose_clause_list
800 ;
801
802choose_clause_list: // CFA
803 case_label_list fall_through
804 { $$ = $1->append_last_case( $2 ); }
805 | case_label_list statement_list fall_through_opt
806 { $$ = $1->append_last_case( new StatementNode( build_compound( (StatementNode *)$2->set_last( $3 ) ) ) ); }
807 | choose_clause_list case_label_list fall_through
808 { $$ = (StatementNode *)( $1->set_last( $2->append_last_case( $3 ))); }
809 | choose_clause_list case_label_list statement_list fall_through_opt
810 { $$ = (StatementNode *)( $1->set_last( $2->append_last_case( new StatementNode( build_compound( (StatementNode *)$3->set_last( $4 ) ) ) ) ) ); }
811 ;
812
813fall_through_opt: // CFA
814 // empty
815 { $$ = new StatementNode( build_branch( BranchStmt::Break ) ); } // insert implicit break
816 | fall_through
817 ;
818
819fall_through: // CFA
820 FALLTHRU
821 { $$ = 0; }
822 | FALLTHRU ';'
823 { $$ = 0; }
824 ;
825
826iteration_statement:
827 WHILE '(' comma_expression ')' statement
828 { $$ = new StatementNode( build_while( $3, $5 ) ); }
829 | DO statement WHILE '(' comma_expression ')' ';'
830 { $$ = new StatementNode( build_while( $5, $2, true ) ); }
831 | FOR '(' push for_control_expression ')' statement
832 { $$ = new StatementNode( build_for( $4, $6 ) ); }
833 ;
834
835for_control_expression:
836 comma_expression_opt pop ';' comma_expression_opt ';' comma_expression_opt
837 { $$ = new ForCtl( $1, $4, $6 ); }
838 | declaration comma_expression_opt ';' comma_expression_opt // C99
839 { $$ = new ForCtl( $1, $2, $4 ); }
840 ;
841
842jump_statement:
843 GOTO IDENTIFIER ';'
844 { $$ = new StatementNode( build_branch( $2, BranchStmt::Goto ) ); }
845 | GOTO '*' comma_expression ';' // GCC, computed goto
846 // The syntax for the GCC computed goto violates normal expression precedence, e.g., goto *i+3; => goto *(i+3);
847 // whereas normal operator precedence yields goto (*i)+3;
848 { $$ = new StatementNode( build_computedgoto( $3 ) ); }
849 | CONTINUE ';'
850 // A semantic check is required to ensure this statement appears only in the body of an iteration statement.
851 { $$ = new StatementNode( build_branch( BranchStmt::Continue ) ); }
852 | CONTINUE IDENTIFIER ';' // CFA, multi-level continue
853 // A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
854 // the target of the transfer appears only at the start of an iteration statement.
855 { $$ = new StatementNode( build_branch( $2, BranchStmt::Continue ) ); }
856 | BREAK ';'
857 // A semantic check is required to ensure this statement appears only in the body of an iteration statement.
858 { $$ = new StatementNode( build_branch( BranchStmt::Break ) ); }
859 | BREAK IDENTIFIER ';' // CFA, multi-level exit
860 // A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
861 // the target of the transfer appears only at the start of an iteration statement.
862 { $$ = new StatementNode( build_branch( $2, BranchStmt::Break ) ); }
863 | RETURN comma_expression_opt ';'
864 { $$ = new StatementNode( build_return( $2 ) ); }
865 | THROW assignment_expression_opt ';' // handles rethrow
866 { $$ = new StatementNode( build_throw( $2 ) ); }
867 | THROWRESUME assignment_expression_opt ';' // handles reresume
868 { $$ = new StatementNode( build_throw( $2 ) ); }
869 | THROWRESUME assignment_expression_opt AT assignment_expression ';' // handles reresume
870 { $$ = new StatementNode( build_throw( $2 ) ); }
871 ;
872
873exception_statement:
874 TRY compound_statement handler_list
875 { $$ = new StatementNode( build_try( $2, $3, 0 ) ); }
876 | TRY compound_statement finally_clause
877 { $$ = new StatementNode( build_try( $2, 0, $3 ) ); }
878 | TRY compound_statement handler_list finally_clause
879 { $$ = new StatementNode( build_try( $2, $3, $4 ) ); }
880 ;
881
882handler_list:
883 handler_clause
884 // ISO/IEC 9899:1999 Section 15.3(6 ) If present, a "..." handler shall be the last handler for its try block.
885 | CATCH '(' ELLIPSIS ')' compound_statement
886 { $$ = new StatementNode( build_catch( 0, $5, true ) ); }
887 | handler_clause CATCH '(' ELLIPSIS ')' compound_statement
888 { $$ = (StatementNode *)$1->set_last( new StatementNode( build_catch( 0, $6, true ) ) ); }
889 | CATCHRESUME '(' ELLIPSIS ')' compound_statement
890 { $$ = new StatementNode( build_catch( 0, $5, true ) ); }
891 | handler_clause CATCHRESUME '(' ELLIPSIS ')' compound_statement
892 { $$ = (StatementNode *)$1->set_last( new StatementNode( build_catch( 0, $6, true ) ) ); }
893 ;
894
895handler_clause:
896 CATCH '(' push push exception_declaration pop ')' compound_statement pop
897 { $$ = new StatementNode( build_catch( $5, $8 ) ); }
898 | handler_clause CATCH '(' push push exception_declaration pop ')' compound_statement pop
899 { $$ = (StatementNode *)$1->set_last( new StatementNode( build_catch( $6, $9 ) ) ); }
900 | CATCHRESUME '(' push push exception_declaration pop ')' compound_statement pop
901 { $$ = new StatementNode( build_catch( $5, $8 ) ); }
902 | handler_clause CATCHRESUME '(' push push exception_declaration pop ')' compound_statement pop
903 { $$ = (StatementNode *)$1->set_last( new StatementNode( build_catch( $6, $9 ) ) ); }
904 ;
905
906finally_clause:
907 FINALLY compound_statement
908 {
909 $$ = new StatementNode( build_finally( $2 ) );
910 }
911 ;
912
913exception_declaration:
914 // A semantic check is required to ensure type_specifier does not create a new type, e.g.:
915 //
916 // catch ( struct { int i; } x ) ...
917 //
918 // This new type cannot catch any thrown type because of name equivalence among types.
919 type_specifier
920 | type_specifier declarator
921 {
922 typedefTable.addToEnclosingScope( TypedefTable::ID );
923 $$ = $2->addType( $1 );
924 }
925 | type_specifier variable_abstract_declarator
926 { $$ = $2->addType( $1 ); }
927 | new_abstract_declarator_tuple no_attr_identifier // CFA
928 {
929 typedefTable.addToEnclosingScope( TypedefTable::ID );
930 $$ = $1->addName( $2 );
931 }
932 | new_abstract_declarator_tuple // CFA
933 ;
934
935asm_statement:
936 ASM asm_volatile_opt '(' string_literal ')' ';'
937 { $$ = new StatementNode( build_asmstmt( $2, $4, 0 ) ); }
938 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ')' ';' // remaining GCC
939 { $$ = new StatementNode( build_asmstmt( $2, $4, $6 ) ); }
940 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ')' ';'
941 { $$ = new StatementNode( build_asmstmt( $2, $4, $6, $8 ) ); }
942 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ':' asm_clobbers_list_opt ')' ';'
943 { $$ = new StatementNode( build_asmstmt( $2, $4, $6, $8, $10 ) ); }
944 | ASM asm_volatile_opt GOTO '(' string_literal ':' ':' asm_operands_opt ':' asm_clobbers_list_opt ':' label_list ')' ';'
945 { $$ = new StatementNode( build_asmstmt( $2, $5, 0, $8, $10, $12 ) ); }
946 ;
947
948asm_volatile_opt: // GCC
949 // empty
950 { $$ = false; }
951 | VOLATILE
952 { $$ = true; }
953 ;
954
955asm_operands_opt: // GCC
956 // empty
957 { $$ = 0; } // use default argument
958 | asm_operands_list
959 ;
960
961asm_operands_list: // GCC
962 asm_operand
963 | asm_operands_list ',' asm_operand
964 { $$ = (ExpressionNode *)$1->set_last( $3 ); }
965 ;
966
967asm_operand: // GCC
968 string_literal '(' constant_expression ')'
969 { $$ = new ExpressionNode( build_asmexpr( 0, $1, $3 ) ); }
970 | '[' constant_expression ']' string_literal '(' constant_expression ')'
971 { $$ = new ExpressionNode( build_asmexpr( $2, $4, $6 ) ); }
972 ;
973
974asm_clobbers_list_opt: // GCC
975 // empty
976 { $$ = 0; } // use default argument
977 | string_literal
978 { $$ = new ExpressionNode( $1 ); }
979 | asm_clobbers_list_opt ',' string_literal
980 { $$ = (ExpressionNode *)$1->set_last( new ExpressionNode( $3 ) ); }
981 ;
982
983label_list:
984 no_attr_identifier
985 {
986 $$ = new LabelNode(); $$->labels.push_back( *$1 );
987 delete $1; // allocated by lexer
988 }
989 | label_list ',' no_attr_identifier
990 {
991 $$ = $1; $1->labels.push_back( *$3 );
992 delete $3; // allocated by lexer
993 }
994 ;
995
996//******************************* DECLARATIONS *********************************
997
998declaration_list_opt: // used at beginning of switch statement
999 pop
1000 { $$ = 0; }
1001 | declaration_list
1002 ;
1003
1004declaration_list:
1005 declaration
1006 | declaration_list push declaration
1007 { $$ = $1->appendList( $3 ); }
1008 ;
1009
1010old_declaration_list_opt: // used to declare parameter types in K&R style functions
1011 pop
1012 { $$ = 0; }
1013 | old_declaration_list
1014 ;
1015
1016old_declaration_list:
1017 old_declaration
1018 | old_declaration_list push old_declaration
1019 { $$ = $1->appendList( $3 ); }
1020 ;
1021
1022local_label_declaration_opt: // GCC, local label
1023 // empty
1024 | local_label_declaration_list
1025 ;
1026
1027local_label_declaration_list: // GCC, local label
1028 LABEL local_label_list ';'
1029 | local_label_declaration_list LABEL local_label_list ';'
1030 ;
1031
1032local_label_list: // GCC, local label
1033 no_attr_identifier_or_type_name {}
1034 | local_label_list ',' no_attr_identifier_or_type_name {}
1035 ;
1036
1037declaration: // CFA, new & old style declarations
1038 new_declaration
1039 | old_declaration
1040 ;
1041
1042// C declaration syntax is notoriously confusing and error prone. Cforall provides its own type, variable and function
1043// declarations. CFA declarations use the same declaration tokens as in C; however, CFA places declaration modifiers to
1044// the left of the base type, while C declarations place modifiers to the right of the base type. CFA declaration
1045// modifiers are interpreted from left to right and the entire type specification is distributed across all variables in
1046// the declaration list (as in Pascal). ANSI C and the new CFA declarations may appear together in the same program
1047// block, but cannot be mixed within a specific declaration.
1048//
1049// CFA C
1050// [10] int x; int x[10]; // array of 10 integers
1051// [10] * char y; char *y[10]; // array of 10 pointers to char
1052
1053new_declaration: // CFA
1054 new_variable_declaration pop ';'
1055 | new_typedef_declaration pop ';'
1056 | new_function_declaration pop ';'
1057 | type_declaring_list pop ';'
1058 | trait_specifier pop ';'
1059 ;
1060
1061new_variable_declaration: // CFA
1062 new_variable_specifier initializer_opt
1063 {
1064 typedefTable.addToEnclosingScope( TypedefTable::ID );
1065 $$ = $1->addInitializer( $2 );
1066 }
1067 | declaration_qualifier_list new_variable_specifier initializer_opt
1068 // declaration_qualifier_list also includes type_qualifier_list, so a semantic check is necessary to preclude
1069 // them as a type_qualifier cannot appear in that context.
1070 {
1071 typedefTable.addToEnclosingScope( TypedefTable::ID );
1072 $$ = $2->addQualifiers( $1 )->addInitializer( $3 );;
1073 }
1074 | new_variable_declaration pop ',' push identifier_or_type_name initializer_opt
1075 {
1076 typedefTable.addToEnclosingScope( *$5, TypedefTable::ID );
1077 $$ = $1->appendList( $1->cloneType( $5 )->addInitializer( $6 ) );
1078 }
1079 ;
1080
1081new_variable_specifier: // CFA
1082 // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
1083 // storage-class
1084 new_abstract_declarator_no_tuple identifier_or_type_name asm_name_opt
1085 {
1086 typedefTable.setNextIdentifier( *$2 );
1087 $$ = $1->addName( $2 );
1088 }
1089 | new_abstract_tuple identifier_or_type_name asm_name_opt
1090 {
1091 typedefTable.setNextIdentifier( *$2 );
1092 $$ = $1->addName( $2 );
1093 }
1094 | type_qualifier_list new_abstract_tuple identifier_or_type_name asm_name_opt
1095 {
1096 typedefTable.setNextIdentifier( *$3 );
1097 $$ = $2->addQualifiers( $1 )->addName( $3 );
1098 }
1099 ;
1100
1101new_function_declaration: // CFA
1102 new_function_specifier
1103 {
1104 typedefTable.addToEnclosingScope( TypedefTable::ID );
1105 $$ = $1;
1106 }
1107 | type_qualifier_list new_function_specifier
1108 {
1109 typedefTable.addToEnclosingScope( TypedefTable::ID );
1110 $$ = $2->addQualifiers( $1 );
1111 }
1112 | declaration_qualifier_list new_function_specifier
1113 {
1114 typedefTable.addToEnclosingScope( TypedefTable::ID );
1115 $$ = $2->addQualifiers( $1 );
1116 }
1117 | declaration_qualifier_list type_qualifier_list new_function_specifier
1118 {
1119 typedefTable.addToEnclosingScope( TypedefTable::ID );
1120 $$ = $3->addQualifiers( $1 )->addQualifiers( $2 );
1121 }
1122 | new_function_declaration pop ',' push identifier_or_type_name
1123 {
1124 typedefTable.addToEnclosingScope( *$5, TypedefTable::ID );
1125 $$ = $1->appendList( $1->cloneType( $5 ) );
1126 }
1127 ;
1128
1129new_function_specifier: // CFA
1130 '[' ']' identifier_or_type_name '(' push new_parameter_type_list_opt pop ')' // S/R conflict
1131 {
1132 $$ = DeclarationNode::newFunction( $3, DeclarationNode::newTuple( 0 ), $6, 0, true );
1133 }
1134// '[' ']' identifier '(' push new_parameter_type_list_opt pop ')'
1135// {
1136// typedefTable.setNextIdentifier( *$5 );
1137// $$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, 0, true );
1138// }
1139// | '[' ']' TYPEDEFname '(' push new_parameter_type_list_opt pop ')'
1140// {
1141// typedefTable.setNextIdentifier( *$5 );
1142// $$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, 0, true );
1143// }
1144// | '[' ']' typegen_name
1145 // identifier_or_type_name must be broken apart because of the sequence:
1146 //
1147 // '[' ']' identifier_or_type_name '(' new_parameter_type_list_opt ')'
1148 // '[' ']' type_specifier
1149 //
1150 // type_specifier can resolve to just TYPEDEFname (e.g., typedef int T; int f( T );). Therefore this must be
1151 // flattened to allow lookahead to the '(' without having to reduce identifier_or_type_name.
1152 | new_abstract_tuple identifier_or_type_name '(' push new_parameter_type_list_opt pop ')'
1153 // To obtain LR(1 ), this rule must be factored out from function return type (see new_abstract_declarator).
1154 {
1155 $$ = DeclarationNode::newFunction( $2, $1, $5, 0, true );
1156 }
1157 | new_function_return identifier_or_type_name '(' push new_parameter_type_list_opt pop ')'
1158 {
1159 $$ = DeclarationNode::newFunction( $2, $1, $5, 0, true );
1160 }
1161 ;
1162
1163new_function_return: // CFA
1164 '[' push new_parameter_list pop ']'
1165 { $$ = DeclarationNode::newTuple( $3 ); }
1166 | '[' push new_parameter_list pop ',' push new_abstract_parameter_list pop ']'
1167 // To obtain LR(1 ), the last new_abstract_parameter_list is added into this flattened rule to lookahead to the
1168 // ']'.
1169 { $$ = DeclarationNode::newTuple( $3->appendList( $7 ) ); }
1170 ;
1171
1172new_typedef_declaration: // CFA
1173 TYPEDEF new_variable_specifier
1174 {
1175 typedefTable.addToEnclosingScope( TypedefTable::TD );
1176 $$ = $2->addTypedef();
1177 }
1178 | TYPEDEF new_function_specifier
1179 {
1180 typedefTable.addToEnclosingScope( TypedefTable::TD );
1181 $$ = $2->addTypedef();
1182 }
1183 | new_typedef_declaration pop ',' push no_attr_identifier
1184 {
1185 typedefTable.addToEnclosingScope( *$5, TypedefTable::TD );
1186 $$ = $1->appendList( $1->cloneType( $5 ) );
1187 }
1188 ;
1189
1190// Traditionally typedef is part of storage-class specifier for syntactic convenience only. Here, it is factored out as
1191// a separate form of declaration, which syntactically precludes storage-class specifiers and initialization.
1192
1193typedef_declaration:
1194 TYPEDEF type_specifier declarator
1195 {
1196 typedefTable.addToEnclosingScope( TypedefTable::TD );
1197 $$ = $3->addType( $2 )->addTypedef();
1198 }
1199 | typedef_declaration pop ',' push declarator
1200 {
1201 typedefTable.addToEnclosingScope( TypedefTable::TD );
1202 $$ = $1->appendList( $1->cloneBaseType( $5 )->addTypedef() );
1203 }
1204 | type_qualifier_list TYPEDEF type_specifier declarator // remaining OBSOLESCENT (see 2 )
1205 {
1206 typedefTable.addToEnclosingScope( TypedefTable::TD );
1207 $$ = $4->addType( $3 )->addQualifiers( $1 )->addTypedef();
1208 }
1209 | type_specifier TYPEDEF declarator
1210 {
1211 typedefTable.addToEnclosingScope( TypedefTable::TD );
1212 $$ = $3->addType( $1 )->addTypedef();
1213 }
1214 | type_specifier TYPEDEF type_qualifier_list declarator
1215 {
1216 typedefTable.addToEnclosingScope( TypedefTable::TD );
1217 $$ = $4->addQualifiers( $1 )->addTypedef()->addType( $1 );
1218 }
1219 ;
1220
1221typedef_expression:
1222 // GCC, naming expression type: typedef name = exp; gives a name to the type of an expression
1223 TYPEDEF no_attr_identifier '=' assignment_expression
1224 {
1225 typedefTable.addToEnclosingScope( *$2, TypedefTable::TD );
1226 $$ = DeclarationNode::newName( 0 ); // XXX
1227 }
1228 | typedef_expression pop ',' push no_attr_identifier '=' assignment_expression
1229 {
1230 typedefTable.addToEnclosingScope( *$5, TypedefTable::TD );
1231 $$ = DeclarationNode::newName( 0 ); // XXX
1232 }
1233 ;
1234
1235old_declaration:
1236 declaring_list pop ';'
1237 | typedef_declaration pop ';'
1238 | typedef_expression pop ';' // GCC, naming expression type
1239 | sue_declaration_specifier pop ';'
1240 ;
1241
1242declaring_list:
1243 // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
1244 // storage-class
1245 declaration_specifier declarator asm_name_opt initializer_opt
1246 {
1247 typedefTable.addToEnclosingScope( TypedefTable::ID );
1248 $$ = ( $2->addType( $1 ))->addInitializer( $4 );
1249 }
1250 | declaring_list ',' attribute_list_opt declarator asm_name_opt initializer_opt
1251 {
1252 typedefTable.addToEnclosingScope( TypedefTable::ID );
1253 $$ = $1->appendList( $1->cloneBaseType( $4->addInitializer( $6 ) ) );
1254 }
1255 ;
1256
1257declaration_specifier: // type specifier + storage class
1258 basic_declaration_specifier
1259 | sue_declaration_specifier
1260 | typedef_declaration_specifier
1261 | typegen_declaration_specifier
1262 ;
1263
1264type_specifier: // declaration specifier - storage class
1265 basic_type_specifier
1266 | sue_type_specifier
1267 | typedef_type_specifier
1268 | typegen_type_specifier
1269 ;
1270
1271type_qualifier_list_opt: // GCC, used in asm_statement
1272 // empty
1273 { $$ = 0; }
1274 | type_qualifier_list
1275 ;
1276
1277type_qualifier_list:
1278 // A semantic check is necessary to ensure a type qualifier is appropriate for the kind of declaration.
1279 //
1280 // ISO/IEC 9899:1999 Section 6.7.3(4 ) : If the same qualifier appears more than once in the same
1281 // specifier-qualifier-list, either directly or via one or more typedefs, the behavior is the same as if it
1282 // appeared only once.
1283 type_qualifier
1284 | type_qualifier_list type_qualifier
1285 { $$ = $1->addQualifiers( $2 ); }
1286 ;
1287
1288type_qualifier:
1289 type_qualifier_name
1290 | attribute
1291 //{ $$ = DeclarationNode::newQualifier( DeclarationNode::Attribute ); }
1292 ;
1293
1294type_qualifier_name:
1295 CONST
1296 { $$ = DeclarationNode::newQualifier( DeclarationNode::Const ); }
1297 | RESTRICT
1298 { $$ = DeclarationNode::newQualifier( DeclarationNode::Restrict ); }
1299 | VOLATILE
1300 { $$ = DeclarationNode::newQualifier( DeclarationNode::Volatile ); }
1301 | LVALUE // CFA
1302 { $$ = DeclarationNode::newQualifier( DeclarationNode::Lvalue ); }
1303 | ATOMIC
1304 { $$ = DeclarationNode::newQualifier( DeclarationNode::Atomic ); }
1305 | FORALL '('
1306 {
1307 typedefTable.enterScope();
1308 }
1309 type_parameter_list ')' // CFA
1310 {
1311 typedefTable.leaveScope();
1312 $$ = DeclarationNode::newForall( $4 );
1313 }
1314 ;
1315
1316declaration_qualifier_list:
1317 storage_class_list
1318 | type_qualifier_list storage_class_list // remaining OBSOLESCENT (see 2 )
1319 { $$ = $1->addQualifiers( $2 ); }
1320 | declaration_qualifier_list type_qualifier_list storage_class_list
1321 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1322 ;
1323
1324storage_class_list:
1325 // A semantic check is necessary to ensure a storage class is appropriate for the kind of declaration and that
1326 // only one of each is specified, except for inline, which can appear with the others.
1327 //
1328 // ISO/IEC 9899:1999 Section 6.7.1(2) : At most, one storage-class specifier may be given in the declaration
1329 // specifiers in a declaration.
1330 storage_class
1331 | storage_class_list storage_class
1332 { $$ = $1->addQualifiers( $2 ); }
1333 ;
1334
1335storage_class:
1336 EXTERN
1337 { $$ = DeclarationNode::newStorageClass( DeclarationNode::Extern ); }
1338 | STATIC
1339 { $$ = DeclarationNode::newStorageClass( DeclarationNode::Static ); }
1340 | AUTO
1341 { $$ = DeclarationNode::newStorageClass( DeclarationNode::Auto ); }
1342 | REGISTER
1343 { $$ = DeclarationNode::newStorageClass( DeclarationNode::Register ); }
1344 | INLINE // C99
1345 //{ $$ = DeclarationNode::newStorageClass( DeclarationNode::Inline ); }
1346 { $$ = new DeclarationNode; $$->isInline = true; }
1347 | FORTRAN // C99
1348 { $$ = DeclarationNode::newStorageClass( DeclarationNode::Fortran ); }
1349 | NORETURN // C11
1350 //{ $$ = DeclarationNode::newStorageClass( DeclarationNode::Noreturn ); }
1351 { $$ = new DeclarationNode; $$->isNoreturn = true; }
1352 | THREADLOCAL // C11
1353 { $$ = DeclarationNode::newStorageClass( DeclarationNode::Threadlocal ); }
1354 ;
1355
1356basic_type_name:
1357 CHAR
1358 { $$ = DeclarationNode::newBasicType( DeclarationNode::Char ); }
1359 | DOUBLE
1360 { $$ = DeclarationNode::newBasicType( DeclarationNode::Double ); }
1361 | FLOAT
1362 { $$ = DeclarationNode::newBasicType( DeclarationNode::Float ); }
1363 | INT
1364 { $$ = DeclarationNode::newBasicType( DeclarationNode::Int ); }
1365 | LONG
1366 { $$ = DeclarationNode::newLength( DeclarationNode::Long ); }
1367 | SHORT
1368 { $$ = DeclarationNode::newLength( DeclarationNode::Short ); }
1369 | SIGNED
1370 { $$ = DeclarationNode::newSignedNess( DeclarationNode::Signed ); }
1371 | UNSIGNED
1372 { $$ = DeclarationNode::newSignedNess( DeclarationNode::Unsigned ); }
1373 | VOID
1374 { $$ = DeclarationNode::newBasicType( DeclarationNode::Void ); }
1375 | BOOL // C99
1376 { $$ = DeclarationNode::newBasicType( DeclarationNode::Bool ); }
1377 | COMPLEX // C99
1378 { $$ = DeclarationNode::newComplexType( DeclarationNode::Complex ); }
1379 | IMAGINARY // C99
1380 { $$ = DeclarationNode::newComplexType( DeclarationNode::Imaginary ); }
1381 | VALIST // GCC, __builtin_va_list
1382 { $$ = DeclarationNode::newBuiltinType( DeclarationNode::Valist ); }
1383 ;
1384
1385basic_declaration_specifier:
1386 // A semantic check is necessary for conflicting storage classes.
1387 basic_type_specifier
1388 | declaration_qualifier_list basic_type_specifier
1389 { $$ = $2->addQualifiers( $1 ); }
1390 | basic_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1391 { $$ = $1->addQualifiers( $2 ); }
1392 | basic_declaration_specifier storage_class type_qualifier_list
1393 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1394 | basic_declaration_specifier storage_class basic_type_specifier
1395 { $$ = $3->addQualifiers( $2 )->addType( $1 ); }
1396 ;
1397
1398basic_type_specifier:
1399 direct_type_name
1400 | type_qualifier_list_opt indirect_type_name type_qualifier_list_opt
1401 { $$ = $2->addQualifiers( $1 )->addQualifiers( $3 ); }
1402 ;
1403
1404direct_type_name:
1405 // A semantic check is necessary for conflicting type qualifiers.
1406 basic_type_name
1407 | type_qualifier_list basic_type_name
1408 { $$ = $2->addQualifiers( $1 ); }
1409 | direct_type_name type_qualifier
1410 { $$ = $1->addQualifiers( $2 ); }
1411 | direct_type_name basic_type_name
1412 { $$ = $1->addType( $2 ); }
1413 ;
1414
1415indirect_type_name:
1416 TYPEOF '(' type_name ')' // GCC: typeof(x) y;
1417 { $$ = $3; }
1418 | TYPEOF '(' comma_expression ')' // GCC: typeof(a+b) y;
1419 { $$ = DeclarationNode::newTypeof( $3 ); }
1420 | ATTR_TYPEGENname '(' type_name ')' // CFA: e.g., @type(x) y;
1421 { $$ = DeclarationNode::newAttr( $1, $3 ); }
1422 | ATTR_TYPEGENname '(' comma_expression ')' // CFA: e.g., @type(a+b) y;
1423 { $$ = DeclarationNode::newAttr( $1, $3 ); }
1424 ;
1425
1426sue_declaration_specifier:
1427 sue_type_specifier
1428 | declaration_qualifier_list sue_type_specifier
1429 { $$ = $2->addQualifiers( $1 ); }
1430 | sue_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1431 { $$ = $1->addQualifiers( $2 ); }
1432 | sue_declaration_specifier storage_class type_qualifier_list
1433 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1434 ;
1435
1436sue_type_specifier:
1437 elaborated_type_name // struct, union, enum
1438 | type_qualifier_list elaborated_type_name
1439 { $$ = $2->addQualifiers( $1 ); }
1440 | sue_type_specifier type_qualifier
1441 { $$ = $1->addQualifiers( $2 ); }
1442 ;
1443
1444typedef_declaration_specifier:
1445 typedef_type_specifier
1446 | declaration_qualifier_list typedef_type_specifier
1447 { $$ = $2->addQualifiers( $1 ); }
1448 | typedef_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1449 { $$ = $1->addQualifiers( $2 ); }
1450 | typedef_declaration_specifier storage_class type_qualifier_list
1451 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1452 ;
1453
1454typedef_type_specifier: // typedef types
1455 TYPEDEFname
1456 { $$ = DeclarationNode::newFromTypedef( $1 ); }
1457 | type_qualifier_list TYPEDEFname
1458 { $$ = DeclarationNode::newFromTypedef( $2 )->addQualifiers( $1 ); }
1459 | typedef_type_specifier type_qualifier
1460 { $$ = $1->addQualifiers( $2 ); }
1461 ;
1462
1463elaborated_type_name:
1464 aggregate_name
1465 | enum_name
1466 ;
1467
1468aggregate_name:
1469 aggregate_key '{' field_declaration_list '}'
1470 { $$ = DeclarationNode::newAggregate( $1, nullptr, nullptr, $3, true ); }
1471 | aggregate_key no_attr_identifier_or_type_name
1472 {
1473 typedefTable.makeTypedef( *$2 );
1474 $$ = DeclarationNode::newAggregate( $1, $2, nullptr, nullptr, false );
1475 }
1476 | aggregate_key no_attr_identifier_or_type_name
1477 { typedefTable.makeTypedef( *$2 ); }
1478 '{' field_declaration_list '}'
1479 { $$ = DeclarationNode::newAggregate( $1, $2, nullptr, $5, true ); }
1480 | aggregate_key '(' type_name_list ')' '{' field_declaration_list '}' // CFA
1481 { $$ = DeclarationNode::newAggregate( $1, nullptr, $3, $6, false ); }
1482 | aggregate_key typegen_name // CFA, S/R conflict
1483 { $$ = $2; }
1484 ;
1485
1486aggregate_key:
1487 STRUCT attribute_list_opt
1488 { $$ = DeclarationNode::Struct; }
1489 | UNION attribute_list_opt
1490 { $$ = DeclarationNode::Union; }
1491 ;
1492
1493field_declaration_list:
1494 // empty
1495 { $$ = 0; }
1496 | field_declaration_list field_declaration
1497 { $$ = $1 != 0 ? $1->appendList( $2 ) : $2; }
1498 ;
1499
1500field_declaration:
1501 new_field_declaring_list ';' // CFA, new style field declaration
1502 | EXTENSION new_field_declaring_list ';' // GCC
1503 { $$ = $2->set_extension( true ); }
1504 | field_declaring_list ';'
1505 | EXTENSION field_declaring_list ';' // GCC
1506 { // mark all fields in list
1507 for ( DeclarationNode *iter = $2; iter != nullptr; iter = (DeclarationNode *)iter->get_next() )
1508 iter->set_extension( true );
1509 $$ = $2;
1510 }
1511 ;
1512
1513new_field_declaring_list: // CFA, new style field declaration
1514 new_abstract_declarator_tuple // CFA, no field name
1515 | new_abstract_declarator_tuple no_attr_identifier_or_type_name
1516 { $$ = $1->addName( $2 ); }
1517 | new_field_declaring_list ',' no_attr_identifier_or_type_name
1518 { $$ = $1->appendList( $1->cloneType( $3 ) ); }
1519 | new_field_declaring_list ',' // CFA, no field name
1520 { $$ = $1->appendList( $1->cloneType( 0 ) ); }
1521 ;
1522
1523field_declaring_list:
1524 type_specifier field_declarator
1525 { $$ = $2->addType( $1 ); }
1526 | field_declaring_list ',' attribute_list_opt field_declarator
1527 { $$ = $1->appendList( $1->cloneBaseType( $4 ) ); }
1528 ;
1529
1530field_declarator:
1531 // empty
1532 { $$ = DeclarationNode::newName( 0 ); /* XXX */ } // CFA, no field name
1533 | bit_subrange_size // no field name
1534 { $$ = DeclarationNode::newBitfield( $1 ); }
1535 | variable_declarator bit_subrange_size_opt
1536 // A semantic check is required to ensure bit_subrange only appears on base type int.
1537 { $$ = $1->addBitfield( $2 ); }
1538 | variable_type_redeclarator bit_subrange_size_opt
1539 // A semantic check is required to ensure bit_subrange only appears on base type int.
1540 { $$ = $1->addBitfield( $2 ); }
1541 | variable_abstract_declarator // CFA, no field name
1542 ;
1543
1544bit_subrange_size_opt:
1545 // empty
1546 { $$ = 0; }
1547 | bit_subrange_size
1548 { $$ = $1; }
1549 ;
1550
1551bit_subrange_size:
1552 ':' constant_expression
1553 { $$ = $2; }
1554 ;
1555
1556enum_key:
1557 ENUM attribute_list_opt
1558 ;
1559
1560enum_name:
1561 enum_key '{' enumerator_list comma_opt '}'
1562 { $$ = DeclarationNode::newEnum( nullptr, $3 ); }
1563 | enum_key no_attr_identifier_or_type_name
1564 {
1565 typedefTable.makeTypedef( *$2 );
1566 $$ = DeclarationNode::newEnum( $2, 0 );
1567 }
1568 | enum_key no_attr_identifier_or_type_name
1569 { typedefTable.makeTypedef( *$2 ); }
1570 '{' enumerator_list comma_opt '}'
1571 { $$ = DeclarationNode::newEnum( $2, $5 ); }
1572 ;
1573
1574enumerator_list:
1575 no_attr_identifier_or_type_name enumerator_value_opt
1576 { $$ = DeclarationNode::newEnumConstant( $1, $2 ); }
1577 | enumerator_list ',' no_attr_identifier_or_type_name enumerator_value_opt
1578 { $$ = $1->appendList( DeclarationNode::newEnumConstant( $3, $4 ) ); }
1579 ;
1580
1581enumerator_value_opt:
1582 // empty
1583 { $$ = 0; }
1584 | '=' constant_expression
1585 { $$ = $2; }
1586 ;
1587
1588// Minimum of one parameter after which ellipsis is allowed only at the end.
1589
1590new_parameter_type_list_opt: // CFA
1591 // empty
1592 { $$ = 0; }
1593 | new_parameter_type_list
1594 ;
1595
1596new_parameter_type_list: // CFA, abstract + real
1597 new_abstract_parameter_list
1598 | new_parameter_list
1599 | new_parameter_list pop ',' push new_abstract_parameter_list
1600 { $$ = $1->appendList( $5 ); }
1601 | new_abstract_parameter_list pop ',' push ELLIPSIS
1602 { $$ = $1->addVarArgs(); }
1603 | new_parameter_list pop ',' push ELLIPSIS
1604 { $$ = $1->addVarArgs(); }
1605 ;
1606
1607new_parameter_list: // CFA
1608 // To obtain LR(1) between new_parameter_list and new_abstract_tuple, the last new_abstract_parameter_list is
1609 // factored out from new_parameter_list, flattening the rules to get lookahead to the ']'.
1610 new_parameter_declaration
1611 | new_abstract_parameter_list pop ',' push new_parameter_declaration
1612 { $$ = $1->appendList( $5 ); }
1613 | new_parameter_list pop ',' push new_parameter_declaration
1614 { $$ = $1->appendList( $5 ); }
1615 | new_parameter_list pop ',' push new_abstract_parameter_list pop ',' push new_parameter_declaration
1616 { $$ = $1->appendList( $5 )->appendList( $9 ); }
1617 ;
1618
1619new_abstract_parameter_list: // CFA, new & old style abstract
1620 new_abstract_parameter_declaration
1621 | new_abstract_parameter_list pop ',' push new_abstract_parameter_declaration
1622 { $$ = $1->appendList( $5 ); }
1623 ;
1624
1625parameter_type_list_opt:
1626 // empty
1627 { $$ = 0; }
1628 | parameter_type_list
1629 ;
1630
1631parameter_type_list:
1632 parameter_list
1633 | parameter_list pop ',' push ELLIPSIS
1634 { $$ = $1->addVarArgs(); }
1635 ;
1636
1637parameter_list: // abstract + real
1638 abstract_parameter_declaration
1639 | parameter_declaration
1640 | parameter_list pop ',' push abstract_parameter_declaration
1641 { $$ = $1->appendList( $5 ); }
1642 | parameter_list pop ',' push parameter_declaration
1643 { $$ = $1->appendList( $5 ); }
1644 ;
1645
1646// Provides optional identifier names (abstract_declarator/variable_declarator), no initialization, different semantics
1647// for typedef name by using type_parameter_redeclarator instead of typedef_redeclarator, and function prototypes.
1648
1649new_parameter_declaration: // CFA, new & old style parameter declaration
1650 parameter_declaration
1651 | new_identifier_parameter_declarator_no_tuple identifier_or_type_name assignment_opt
1652 { $$ = $1->addName( $2 ); }
1653 | new_abstract_tuple identifier_or_type_name assignment_opt
1654 // To obtain LR(1), these rules must be duplicated here (see new_abstract_declarator).
1655 { $$ = $1->addName( $2 ); }
1656 | type_qualifier_list new_abstract_tuple identifier_or_type_name assignment_opt
1657 { $$ = $2->addName( $3 )->addQualifiers( $1 ); }
1658 | new_function_specifier
1659 ;
1660
1661new_abstract_parameter_declaration: // CFA, new & old style parameter declaration
1662 abstract_parameter_declaration
1663 | new_identifier_parameter_declarator_no_tuple
1664 | new_abstract_tuple
1665 // To obtain LR(1), these rules must be duplicated here (see new_abstract_declarator).
1666 | type_qualifier_list new_abstract_tuple
1667 { $$ = $2->addQualifiers( $1 ); }
1668 | new_abstract_function
1669 ;
1670
1671parameter_declaration:
1672 declaration_specifier identifier_parameter_declarator assignment_opt
1673 {
1674 typedefTable.addToEnclosingScope( TypedefTable::ID );
1675 $$ = $2->addType( $1 )->addInitializer( new InitializerNode( $3 ) );
1676 }
1677 | declaration_specifier type_parameter_redeclarator assignment_opt
1678 {
1679 typedefTable.addToEnclosingScope( TypedefTable::ID );
1680 $$ = $2->addType( $1 )->addInitializer( new InitializerNode( $3 ) );
1681 }
1682 ;
1683
1684abstract_parameter_declaration:
1685 declaration_specifier
1686 | declaration_specifier abstract_parameter_declarator
1687 { $$ = $2->addType( $1 ); }
1688 ;
1689
1690// ISO/IEC 9899:1999 Section 6.9.1(6) : "An identifier declared as a typedef name shall not be redeclared as a
1691// parameter." Because the scope of the K&R-style parameter-list sees the typedef first, the following is based only on
1692// identifiers. The ANSI-style parameter-list can redefine a typedef name.
1693
1694identifier_list: // K&R-style parameter list => no types
1695 no_attr_identifier
1696 { $$ = DeclarationNode::newName( $1 ); }
1697 | identifier_list ',' no_attr_identifier
1698 { $$ = $1->appendList( DeclarationNode::newName( $3 ) ); }
1699 ;
1700
1701identifier_or_type_name:
1702 identifier
1703 | TYPEDEFname
1704 | TYPEGENname
1705 ;
1706
1707no_01_identifier_or_type_name:
1708 no_01_identifier
1709 | TYPEDEFname
1710 | TYPEGENname
1711 ;
1712
1713no_attr_identifier_or_type_name:
1714 no_attr_identifier
1715 | TYPEDEFname
1716 | TYPEGENname
1717 ;
1718
1719type_name_no_function: // sizeof, alignof, cast (constructor)
1720 new_abstract_declarator_tuple // CFA
1721 | type_specifier
1722 | type_specifier variable_abstract_declarator
1723 { $$ = $2->addType( $1 ); }
1724 ;
1725
1726type_name: // typeof, assertion
1727 new_abstract_declarator_tuple // CFA
1728 | new_abstract_function // CFA
1729 | type_specifier
1730 | type_specifier abstract_declarator
1731 { $$ = $2->addType( $1 ); }
1732 ;
1733
1734initializer_opt:
1735 // empty
1736 { $$ = 0; }
1737 | '=' initializer
1738 { $$ = $2; }
1739 | ATassign initializer
1740 { $$ = $2->set_maybeConstructed( false ); }
1741 ;
1742
1743initializer:
1744 assignment_expression { $$ = new InitializerNode( $1 ); }
1745 | '{' initializer_list comma_opt '}' { $$ = new InitializerNode( $2, true ); }
1746 ;
1747
1748initializer_list:
1749 // empty
1750 { $$ = 0; }
1751 | initializer
1752 | designation initializer { $$ = $2->set_designators( $1 ); }
1753 | initializer_list ',' initializer { $$ = (InitializerNode *)( $1->set_last( $3 ) ); }
1754 | initializer_list ',' designation initializer
1755 { $$ = (InitializerNode *)( $1->set_last( $4->set_designators( $3 ) ) ); }
1756 ;
1757
1758// There is an unreconcileable parsing problem between C99 and CFA with respect to designators. The problem is use of
1759// '=' to separator the designator from the initializer value, as in:
1760//
1761// int x[10] = { [1] = 3 };
1762//
1763// The string "[1] = 3" can be parsed as a designator assignment or a tuple assignment. To disambiguate this case, CFA
1764// changes the syntax from "=" to ":" as the separator between the designator and initializer. GCC does uses ":" for
1765// field selection. The optional use of the "=" in GCC, or in this case ":", cannot be supported either due to
1766// shift/reduce conflicts
1767
1768designation:
1769 designator_list ':' // C99, CFA uses ":" instead of "="
1770 | no_attr_identifier_or_type_name ':' // GCC, field name
1771 { $$ = new ExpressionNode( build_varref( $1 ) ); }
1772 ;
1773
1774designator_list: // C99
1775 designator
1776 | designator_list designator
1777 { $$ = (ExpressionNode *)( $1->set_last( $2 ) ); }
1778 //| designator_list designator { $$ = new ExpressionNode( $1, $2 ); }
1779 ;
1780
1781designator:
1782 '.' no_attr_identifier_or_type_name // C99, field name
1783 { $$ = new ExpressionNode( build_varref( $2 ) ); }
1784 | '[' push assignment_expression pop ']' // C99, single array element
1785 // assignment_expression used instead of constant_expression because of shift/reduce conflicts with tuple.
1786 { $$ = $3; }
1787 | '[' push subrange pop ']' // CFA, multiple array elements
1788 { $$ = $3; }
1789 | '[' push constant_expression ELLIPSIS constant_expression pop ']' // GCC, multiple array elements
1790 { $$ = new ExpressionNode( build_range( $3, $5 ) ); }
1791 | '.' '[' push field_list pop ']' // CFA, tuple field selector
1792 { $$ = $4; }
1793 ;
1794
1795// The CFA type system is based on parametric polymorphism, the ability to declare functions with type parameters,
1796// rather than an object-oriented type system. This required four groups of extensions:
1797//
1798// Overloading: function, data, and operator identifiers may be overloaded.
1799//
1800// Type declarations: "type" is used to generate new types for declaring objects. Similarly, "dtype" is used for object
1801// and incomplete types, and "ftype" is used for function types. Type declarations with initializers provide
1802// definitions of new types. Type declarations with storage class "extern" provide opaque types.
1803//
1804// Polymorphic functions: A forall clause declares a type parameter. The corresponding argument is inferred at the call
1805// site. A polymorphic function is not a template; it is a function, with an address and a type.
1806//
1807// Specifications and Assertions: Specifications are collections of declarations parameterized by one or more
1808// types. They serve many of the purposes of abstract classes, and specification hierarchies resemble subclass
1809// hierarchies. Unlike classes, they can define relationships between types. Assertions declare that a type or
1810// types provide the operations declared by a specification. Assertions are normally used to declare requirements
1811// on type arguments of polymorphic functions.
1812
1813typegen_declaration_specifier: // CFA
1814 typegen_type_specifier
1815 | declaration_qualifier_list typegen_type_specifier
1816 { $$ = $2->addQualifiers( $1 ); }
1817 | typegen_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1818 { $$ = $1->addQualifiers( $2 ); }
1819 | typegen_declaration_specifier storage_class type_qualifier_list
1820 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1821 ;
1822
1823typegen_type_specifier: // CFA
1824 typegen_name
1825 | type_qualifier_list typegen_name
1826 { $$ = $2->addQualifiers( $1 ); }
1827 | typegen_type_specifier type_qualifier
1828 { $$ = $1->addQualifiers( $2 ); }
1829 ;
1830
1831typegen_name: // CFA
1832 TYPEGENname '(' type_name_list ')'
1833 { $$ = DeclarationNode::newFromTypeGen( $1, $3 ); }
1834 ;
1835
1836type_parameter_list: // CFA
1837 type_parameter assignment_opt
1838 | type_parameter_list ',' type_parameter assignment_opt
1839 { $$ = $1->appendList( $3 ); }
1840 ;
1841
1842type_parameter: // CFA
1843 type_class no_attr_identifier_or_type_name
1844 { typedefTable.addToEnclosingScope( *$2, TypedefTable::TD ); }
1845 assertion_list_opt
1846 { $$ = DeclarationNode::newTypeParam( $1, $2 )->addAssertions( $4 ); }
1847 | type_specifier identifier_parameter_declarator
1848 ;
1849
1850type_class: // CFA
1851 OTYPE
1852 { $$ = DeclarationNode::Otype; }
1853 | DTYPE
1854 { $$ = DeclarationNode::Ftype; }
1855 | FTYPE
1856 { $$ = DeclarationNode::Dtype; }
1857 ;
1858
1859assertion_list_opt: // CFA
1860 // empty
1861 { $$ = 0; }
1862 | assertion_list_opt assertion
1863 { $$ = $1 != 0 ? $1->appendList( $2 ) : $2; }
1864 ;
1865
1866assertion: // CFA
1867 '|' no_attr_identifier_or_type_name '(' type_name_list ')'
1868 {
1869 typedefTable.openTrait( *$2 );
1870 $$ = DeclarationNode::newTraitUse( $2, $4 );
1871 }
1872 | '|' '{' push trait_declaration_list '}'
1873 { $$ = $4; }
1874 | '|' '(' push type_parameter_list pop ')' '{' push trait_declaration_list '}' '(' type_name_list ')'
1875 { $$ = 0; }
1876 ;
1877
1878type_name_list: // CFA
1879 type_name
1880 { $$ = new ExpressionNode( build_typevalue( $1 ) ); }
1881 | assignment_expression
1882 | type_name_list ',' type_name
1883 { $$ = (ExpressionNode *)( $1->set_last( new ExpressionNode( build_typevalue( $3 ) ) ) ); }
1884 | type_name_list ',' assignment_expression
1885 { $$ = (ExpressionNode *)( $1->set_last( $3 )); }
1886 ;
1887
1888type_declaring_list: // CFA
1889 OTYPE type_declarator
1890 { $$ = $2; }
1891 | storage_class_list OTYPE type_declarator
1892 { $$ = $3->addQualifiers( $1 ); }
1893 | type_declaring_list ',' type_declarator
1894 { $$ = $1->appendList( $3->copyStorageClasses( $1 ) ); }
1895 ;
1896
1897type_declarator: // CFA
1898 type_declarator_name assertion_list_opt
1899 { $$ = $1->addAssertions( $2 ); }
1900 | type_declarator_name assertion_list_opt '=' type_name
1901 { $$ = $1->addAssertions( $2 )->addType( $4 ); }
1902 ;
1903
1904type_declarator_name: // CFA
1905 no_attr_identifier_or_type_name
1906 {
1907 typedefTable.addToEnclosingScope( *$1, TypedefTable::TD );
1908 $$ = DeclarationNode::newTypeDecl( $1, 0 );
1909 }
1910 | no_01_identifier_or_type_name '(' push type_parameter_list pop ')'
1911 {
1912 typedefTable.addToEnclosingScope( *$1, TypedefTable::TG );
1913 $$ = DeclarationNode::newTypeDecl( $1, $4 );
1914 }
1915 ;
1916
1917trait_specifier: // CFA
1918 TRAIT no_attr_identifier_or_type_name '(' push type_parameter_list pop ')' '{' '}'
1919 {
1920 typedefTable.addToEnclosingScope( *$2, TypedefTable::ID );
1921 $$ = DeclarationNode::newTrait( $2, $5, 0 );
1922 }
1923 | TRAIT no_attr_identifier_or_type_name '(' push type_parameter_list pop ')' '{'
1924 {
1925 typedefTable.enterTrait( *$2 );
1926 typedefTable.enterScope();
1927 }
1928 trait_declaration_list '}'
1929 {
1930 typedefTable.leaveTrait();
1931 typedefTable.addToEnclosingScope( *$2, TypedefTable::ID );
1932 $$ = DeclarationNode::newTrait( $2, $5, $10 );
1933 }
1934 ;
1935
1936trait_declaration_list: // CFA
1937 trait_declaration
1938 | trait_declaration_list push trait_declaration
1939 { $$ = $1->appendList( $3 ); }
1940 ;
1941
1942trait_declaration: // CFA
1943 new_trait_declaring_list pop ';'
1944 | trait_declaring_list pop ';'
1945 ;
1946
1947new_trait_declaring_list: // CFA
1948 new_variable_specifier
1949 {
1950 typedefTable.addToEnclosingScope2( TypedefTable::ID );
1951 $$ = $1;
1952 }
1953 | new_function_specifier
1954 {
1955 typedefTable.addToEnclosingScope2( TypedefTable::ID );
1956 $$ = $1;
1957 }
1958 | new_trait_declaring_list pop ',' push identifier_or_type_name
1959 {
1960 typedefTable.addToEnclosingScope2( *$5, TypedefTable::ID );
1961 $$ = $1->appendList( $1->cloneType( $5 ) );
1962 }
1963 ;
1964
1965trait_declaring_list: // CFA
1966 type_specifier declarator
1967 {
1968 typedefTable.addToEnclosingScope2( TypedefTable::ID );
1969 $$ = $2->addType( $1 );
1970 }
1971 | trait_declaring_list pop ',' push declarator
1972 {
1973 typedefTable.addToEnclosingScope2( TypedefTable::ID );
1974 $$ = $1->appendList( $1->cloneBaseType( $5 ) );
1975 }
1976 ;
1977
1978//***************************** EXTERNAL DEFINITIONS *****************************
1979
1980translation_unit:
1981 // empty
1982 {} // empty input file
1983 | external_definition_list
1984 { parseTree = parseTree != nullptr ? parseTree->appendList( $1 ) : $1; }
1985 ;
1986
1987external_definition_list:
1988 external_definition
1989 | external_definition_list push external_definition
1990 { $$ = $1 != nullptr ? $1->appendList( $3 ) : $3; }
1991 ;
1992
1993external_definition_list_opt:
1994 // empty
1995 { $$ = 0; }
1996 | external_definition_list
1997 ;
1998
1999external_definition:
2000 declaration
2001 | external_function_definition
2002 | asm_statement // GCC, global assembler statement
2003 {}
2004 | EXTERN STRINGliteral
2005 {
2006 linkageStack.push( linkage ); // handle nested extern "C"/"Cforall"
2007 linkage = LinkageSpec::fromString( *$2 );
2008 }
2009 '{' external_definition_list_opt '}' // C++-style linkage specifier
2010 {
2011 linkage = linkageStack.top();
2012 linkageStack.pop();
2013 $$ = $5;
2014 }
2015 | EXTENSION external_definition
2016 { // mark all fields in list
2017 for ( DeclarationNode *iter = $2; iter != nullptr; iter = (DeclarationNode *)iter->get_next() )
2018 iter->set_extension( true );
2019 $$ = $2;
2020 }
2021 ;
2022
2023external_function_definition:
2024 function_definition
2025 // These rules are a concession to the "implicit int" type_specifier because there is a significant amount of
2026 // legacy code with global functions missing the type-specifier for the return type, and assuming "int".
2027 // Parsing is possible because function_definition does not appear in the context of an expression (nested
2028 // functions preclude this concession, i.e., all nested function must have a return type). A function prototype
2029 // declaration must still have a type_specifier. OBSOLESCENT (see 1)
2030 | function_declarator compound_statement
2031 {
2032 typedefTable.addToEnclosingScope( TypedefTable::ID );
2033 typedefTable.leaveScope();
2034 $$ = $1->addFunctionBody( $2 );
2035 }
2036 | old_function_declarator push old_declaration_list_opt compound_statement
2037 {
2038 typedefTable.addToEnclosingScope( TypedefTable::ID );
2039 typedefTable.leaveScope();
2040 $$ = $1->addOldDeclList( $3 )->addFunctionBody( $4 );
2041 }
2042 ;
2043
2044function_definition:
2045 new_function_declaration compound_statement // CFA
2046 {
2047 typedefTable.addToEnclosingScope( TypedefTable::ID );
2048 typedefTable.leaveScope();
2049 $$ = $1->addFunctionBody( $2 );
2050 }
2051 | declaration_specifier function_declarator compound_statement
2052 {
2053 typedefTable.addToEnclosingScope( TypedefTable::ID );
2054 typedefTable.leaveScope();
2055 $$ = $2->addFunctionBody( $3 )->addType( $1 );
2056 }
2057 | type_qualifier_list function_declarator compound_statement
2058 {
2059 typedefTable.addToEnclosingScope( TypedefTable::ID );
2060 typedefTable.leaveScope();
2061 $$ = $2->addFunctionBody( $3 )->addQualifiers( $1 );
2062 }
2063 | declaration_qualifier_list function_declarator compound_statement
2064 {
2065 typedefTable.addToEnclosingScope( TypedefTable::ID );
2066 typedefTable.leaveScope();
2067 $$ = $2->addFunctionBody( $3 )->addQualifiers( $1 );
2068 }
2069 | declaration_qualifier_list type_qualifier_list function_declarator compound_statement
2070 {
2071 typedefTable.addToEnclosingScope( TypedefTable::ID );
2072 typedefTable.leaveScope();
2073 $$ = $3->addFunctionBody( $4 )->addQualifiers( $2 )->addQualifiers( $1 );
2074 }
2075
2076 // Old-style K&R function definition, OBSOLESCENT (see 4)
2077 | declaration_specifier old_function_declarator push old_declaration_list_opt compound_statement
2078 {
2079 typedefTable.addToEnclosingScope( TypedefTable::ID );
2080 typedefTable.leaveScope();
2081 $$ = $2->addOldDeclList( $4 )->addFunctionBody( $5 )->addType( $1 );
2082 }
2083 | type_qualifier_list old_function_declarator push old_declaration_list_opt compound_statement
2084 {
2085 typedefTable.addToEnclosingScope( TypedefTable::ID );
2086 typedefTable.leaveScope();
2087 $$ = $2->addOldDeclList( $4 )->addFunctionBody( $5 )->addQualifiers( $1 );
2088 }
2089
2090 // Old-style K&R function definition with "implicit int" type_specifier, OBSOLESCENT (see 4)
2091 | declaration_qualifier_list old_function_declarator push old_declaration_list_opt compound_statement
2092 {
2093 typedefTable.addToEnclosingScope( TypedefTable::ID );
2094 typedefTable.leaveScope();
2095 $$ = $2->addOldDeclList( $4 )->addFunctionBody( $5 )->addQualifiers( $1 );
2096 }
2097 | declaration_qualifier_list type_qualifier_list old_function_declarator push old_declaration_list_opt compound_statement
2098 {
2099 typedefTable.addToEnclosingScope( TypedefTable::ID );
2100 typedefTable.leaveScope();
2101 $$ = $3->addOldDeclList( $5 )->addFunctionBody( $6 )->addQualifiers( $2 )->addQualifiers( $1 );
2102 }
2103 ;
2104
2105declarator:
2106 variable_declarator
2107 | variable_type_redeclarator
2108 | function_declarator
2109 ;
2110
2111subrange:
2112 constant_expression '~' constant_expression // CFA, integer subrange
2113 { $$ = new ExpressionNode( build_range( $1, $3 ) ); }
2114 ;
2115
2116asm_name_opt: // GCC
2117 // empty
2118 | ASM '(' string_literal_list ')' attribute_list_opt { delete $3; } // FIX ME: unimplemented
2119 ;
2120
2121attribute_list_opt: // GCC
2122 // empty
2123 { $$ = 0; }
2124 | attribute_list
2125 ;
2126
2127attribute_list: // GCC
2128 attribute
2129 | attribute_list attribute
2130 { $$ = $2->addQualifiers( $1 ); }
2131 ;
2132
2133attribute: // GCC
2134 ATTRIBUTE '(' '(' attribute_parameter_list ')' ')'
2135 // { $$ = DeclarationNode::newQualifier( DeclarationNode::Attribute ); }
2136 { $$ = 0; }
2137 ;
2138
2139attribute_parameter_list: // GCC
2140 attrib
2141 | attribute_parameter_list ',' attrib
2142 ;
2143
2144attrib: // GCC
2145 // empty
2146 | any_word
2147 | any_word '(' comma_expression_opt ')' { delete $3; } // FIX ME: unimplemented
2148 ;
2149
2150any_word: // GCC
2151 identifier_or_type_name { delete $1; } // FIX ME: unimplemented
2152 | storage_class { delete $1; } // FIX ME: unimplemented
2153 | basic_type_name { delete $1; } // FIX ME: unimplemented
2154 | type_qualifier { delete $1; } // FIX ME: unimplemented
2155 ;
2156
2157// ============================================================================
2158// The following sections are a series of grammar patterns used to parse declarators. Multiple patterns are necessary
2159// because the type of an identifier in wrapped around the identifier in the same form as its usage in an expression, as
2160// in:
2161//
2162// int (*f())[10] { ... };
2163// ... (*f())[3] += 1; // definition mimics usage
2164//
2165// Because these patterns are highly recursive, changes at a lower level in the recursion require copying some or all of
2166// the pattern. Each of these patterns has some subtle variation to ensure correct syntax in a particular context.
2167// ============================================================================
2168
2169// ----------------------------------------------------------------------------
2170// The set of valid declarators before a compound statement for defining a function is less than the set of declarators
2171// to define a variable or function prototype, e.g.:
2172//
2173// valid declaration invalid definition
2174// ----------------- ------------------
2175// int f; int f {}
2176// int *f; int *f {}
2177// int f[10]; int f[10] {}
2178// int (*f)(int); int (*f)(int) {}
2179//
2180// To preclude this syntactic anomaly requires separating the grammar rules for variable and function declarators, hence
2181// variable_declarator and function_declarator.
2182// ----------------------------------------------------------------------------
2183
2184// This pattern parses a declaration of a variable that is not redefining a typedef name. The pattern precludes
2185// declaring an array of functions versus a pointer to an array of functions.
2186
2187variable_declarator:
2188 paren_identifier attribute_list_opt
2189 { $$ = $1->addQualifiers( $2 ); }
2190 | variable_ptr
2191 | variable_array attribute_list_opt
2192 { $$ = $1->addQualifiers( $2 ); }
2193 | variable_function attribute_list_opt
2194 { $$ = $1->addQualifiers( $2 ); }
2195 ;
2196
2197paren_identifier:
2198 identifier
2199 {
2200 typedefTable.setNextIdentifier( *$1 );
2201 $$ = DeclarationNode::newName( $1 );
2202 }
2203 | '(' paren_identifier ')' // redundant parenthesis
2204 { $$ = $2; }
2205 ;
2206
2207variable_ptr:
2208 ptrref_operator variable_declarator
2209 { $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2210 | ptrref_operator type_qualifier_list variable_declarator
2211 { $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2212 | '(' variable_ptr ')'
2213 { $$ = $2; }
2214 ;
2215
2216variable_array:
2217 paren_identifier array_dimension
2218 { $$ = $1->addArray( $2 ); }
2219 | '(' variable_ptr ')' array_dimension
2220 { $$ = $2->addArray( $4 ); }
2221 | '(' variable_array ')' multi_array_dimension // redundant parenthesis
2222 { $$ = $2->addArray( $4 ); }
2223 | '(' variable_array ')' // redundant parenthesis
2224 { $$ = $2; }
2225 ;
2226
2227variable_function:
2228 '(' variable_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2229 { $$ = $2->addParamList( $6 ); }
2230 | '(' variable_function ')' // redundant parenthesis
2231 { $$ = $2; }
2232 ;
2233
2234// This pattern parses a function declarator that is not redefining a typedef name. For non-nested functions, there is
2235// no context where a function definition can redefine a typedef name, i.e., the typedef and function name cannot exist
2236// is the same scope. The pattern precludes returning arrays and functions versus pointers to arrays and functions.
2237
2238function_declarator:
2239 function_no_ptr attribute_list_opt
2240 { $$ = $1->addQualifiers( $2 ); }
2241 | function_ptr
2242 | function_array attribute_list_opt
2243 { $$ = $1->addQualifiers( $2 ); }
2244 ;
2245
2246function_no_ptr:
2247 paren_identifier '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2248 { $$ = $1->addParamList( $4 ); }
2249 | '(' function_ptr ')' '(' push parameter_type_list_opt pop ')'
2250 { $$ = $2->addParamList( $6 ); }
2251 | '(' function_no_ptr ')' // redundant parenthesis
2252 { $$ = $2; }
2253 ;
2254
2255function_ptr:
2256 ptrref_operator function_declarator
2257 { $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2258 | ptrref_operator type_qualifier_list function_declarator
2259 { $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2260 | '(' function_ptr ')'
2261 { $$ = $2; }
2262 ;
2263
2264function_array:
2265 '(' function_ptr ')' array_dimension
2266 { $$ = $2->addArray( $4 ); }
2267 | '(' function_array ')' multi_array_dimension // redundant parenthesis
2268 { $$ = $2->addArray( $4 ); }
2269 | '(' function_array ')' // redundant parenthesis
2270 { $$ = $2; }
2271 ;
2272
2273// This pattern parses an old-style K&R function declarator (OBSOLESCENT, see 4) that is not redefining a typedef name
2274// (see function_declarator for additional comments). The pattern precludes returning arrays and functions versus
2275// pointers to arrays and functions.
2276
2277old_function_declarator:
2278 old_function_no_ptr
2279 | old_function_ptr
2280 | old_function_array
2281 ;
2282
2283old_function_no_ptr:
2284 paren_identifier '(' identifier_list ')' // function_declarator handles empty parameter
2285 { $$ = $1->addIdList( $3 ); }
2286 | '(' old_function_ptr ')' '(' identifier_list ')'
2287 { $$ = $2->addIdList( $5 ); }
2288 | '(' old_function_no_ptr ')' // redundant parenthesis
2289 { $$ = $2; }
2290 ;
2291
2292old_function_ptr:
2293 ptrref_operator old_function_declarator
2294 { $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2295 | ptrref_operator type_qualifier_list old_function_declarator
2296 { $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2297 | '(' old_function_ptr ')'
2298 { $$ = $2; }
2299 ;
2300
2301old_function_array:
2302 '(' old_function_ptr ')' array_dimension
2303 { $$ = $2->addArray( $4 ); }
2304 | '(' old_function_array ')' multi_array_dimension // redundant parenthesis
2305 { $$ = $2->addArray( $4 ); }
2306 | '(' old_function_array ')' // redundant parenthesis
2307 { $$ = $2; }
2308 ;
2309
2310// This pattern parses a declaration for a variable or function prototype that redefines a type name, e.g.:
2311//
2312// typedef int foo;
2313// {
2314// int foo; // redefine typedef name in new scope
2315// }
2316//
2317// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
2318// and functions versus pointers to arrays and functions.
2319
2320variable_type_redeclarator:
2321 paren_type attribute_list_opt
2322 { $$ = $1->addQualifiers( $2 ); }
2323 | type_ptr
2324 | type_array attribute_list_opt
2325 { $$ = $1->addQualifiers( $2 ); }
2326 | type_function attribute_list_opt
2327 { $$ = $1->addQualifiers( $2 ); }
2328 ;
2329
2330paren_type:
2331 typedef
2332 | '(' paren_type ')'
2333 { $$ = $2; }
2334 ;
2335
2336type_ptr:
2337 ptrref_operator variable_type_redeclarator
2338 { $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2339 | ptrref_operator type_qualifier_list variable_type_redeclarator
2340 { $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2341 | '(' type_ptr ')'
2342 { $$ = $2; }
2343 ;
2344
2345type_array:
2346 paren_type array_dimension
2347 { $$ = $1->addArray( $2 ); }
2348 | '(' type_ptr ')' array_dimension
2349 { $$ = $2->addArray( $4 ); }
2350 | '(' type_array ')' multi_array_dimension // redundant parenthesis
2351 { $$ = $2->addArray( $4 ); }
2352 | '(' type_array ')' // redundant parenthesis
2353 { $$ = $2; }
2354 ;
2355
2356type_function:
2357 paren_type '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2358 { $$ = $1->addParamList( $4 ); }
2359 | '(' type_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2360 { $$ = $2->addParamList( $6 ); }
2361 | '(' type_function ')' // redundant parenthesis
2362 { $$ = $2; }
2363 ;
2364
2365// This pattern parses a declaration for a parameter variable or function prototype that is not redefining a typedef
2366// name and allows the C99 array options, which can only appear in a parameter list. The pattern precludes declaring an
2367// array of functions versus a pointer to an array of functions, and returning arrays and functions versus pointers to
2368// arrays and functions.
2369
2370identifier_parameter_declarator:
2371 paren_identifier attribute_list_opt
2372 { $$ = $1->addQualifiers( $2 ); }
2373 | identifier_parameter_ptr
2374 | identifier_parameter_array attribute_list_opt
2375 { $$ = $1->addQualifiers( $2 ); }
2376 | identifier_parameter_function attribute_list_opt
2377 { $$ = $1->addQualifiers( $2 ); }
2378 ;
2379
2380identifier_parameter_ptr:
2381 ptrref_operator identifier_parameter_declarator
2382 { $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2383 | ptrref_operator type_qualifier_list identifier_parameter_declarator
2384 { $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2385 | '(' identifier_parameter_ptr ')'
2386 { $$ = $2; }
2387 ;
2388
2389identifier_parameter_array:
2390 paren_identifier array_parameter_dimension
2391 { $$ = $1->addArray( $2 ); }
2392 | '(' identifier_parameter_ptr ')' array_dimension
2393 { $$ = $2->addArray( $4 ); }
2394 | '(' identifier_parameter_array ')' multi_array_dimension // redundant parenthesis
2395 { $$ = $2->addArray( $4 ); }
2396 | '(' identifier_parameter_array ')' // redundant parenthesis
2397 { $$ = $2; }
2398 ;
2399
2400identifier_parameter_function:
2401 paren_identifier '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2402 { $$ = $1->addParamList( $4 ); }
2403 | '(' identifier_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2404 { $$ = $2->addParamList( $6 ); }
2405 | '(' identifier_parameter_function ')' // redundant parenthesis
2406 { $$ = $2; }
2407 ;
2408
2409// This pattern parses a declaration for a parameter variable or function prototype that is redefining a typedef name,
2410// e.g.:
2411//
2412// typedef int foo;
2413// int f( int foo ); // redefine typedef name in new scope
2414//
2415// and allows the C99 array options, which can only appear in a parameter list. In addition, the pattern handles the
2416// special meaning of parenthesis around a typedef name:
2417//
2418// ISO/IEC 9899:1999 Section 6.7.5.3(11) : "In a parameter declaration, a single typedef name in
2419// parentheses is taken to be an abstract declarator that specifies a function with a single parameter,
2420// not as redundant parentheses around the identifier."
2421//
2422// For example:
2423//
2424// typedef float T;
2425// int f( int ( T [5] ) ); // see abstract_parameter_declarator
2426// int g( int ( T ( int ) ) ); // see abstract_parameter_declarator
2427// int f( int f1( T a[5] ) ); // see identifier_parameter_declarator
2428// int g( int g1( T g2( int p ) ) ); // see identifier_parameter_declarator
2429//
2430// In essence, a '(' immediately to the left of typedef name, T, is interpreted as starting a parameter type list, and
2431// not as redundant parentheses around a redeclaration of T. Finally, the pattern also precludes declaring an array of
2432// functions versus a pointer to an array of functions, and returning arrays and functions versus pointers to arrays and
2433// functions.
2434
2435type_parameter_redeclarator:
2436 typedef attribute_list_opt
2437 { $$ = $1->addQualifiers( $2 ); }
2438 | type_parameter_ptr
2439 | type_parameter_array attribute_list_opt
2440 { $$ = $1->addQualifiers( $2 ); }
2441 | type_parameter_function attribute_list_opt
2442 { $$ = $1->addQualifiers( $2 ); }
2443 ;
2444
2445typedef:
2446 TYPEDEFname
2447 {
2448 typedefTable.setNextIdentifier( *$1 );
2449 $$ = DeclarationNode::newName( $1 );
2450 }
2451 | TYPEGENname
2452 {
2453 typedefTable.setNextIdentifier( *$1 );
2454 $$ = DeclarationNode::newName( $1 );
2455 }
2456 ;
2457
2458type_parameter_ptr:
2459 ptrref_operator type_parameter_redeclarator
2460 { $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2461 | ptrref_operator type_qualifier_list type_parameter_redeclarator
2462 { $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2463 | '(' type_parameter_ptr ')'
2464 { $$ = $2; }
2465 ;
2466
2467type_parameter_array:
2468 typedef array_parameter_dimension
2469 { $$ = $1->addArray( $2 ); }
2470 | '(' type_parameter_ptr ')' array_parameter_dimension
2471 { $$ = $2->addArray( $4 ); }
2472 ;
2473
2474type_parameter_function:
2475 typedef '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2476 { $$ = $1->addParamList( $4 ); }
2477 | '(' type_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2478 { $$ = $2->addParamList( $6 ); }
2479 ;
2480
2481// This pattern parses a declaration of an abstract variable or function prototype, i.e., there is no identifier to
2482// which the type applies, e.g.:
2483//
2484// sizeof( int );
2485// sizeof( int [10] );
2486//
2487// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
2488// and functions versus pointers to arrays and functions.
2489
2490abstract_declarator:
2491 abstract_ptr
2492 | abstract_array attribute_list_opt
2493 { $$ = $1->addQualifiers( $2 ); }
2494 | abstract_function attribute_list_opt
2495 { $$ = $1->addQualifiers( $2 ); }
2496 ;
2497
2498abstract_ptr:
2499 ptrref_operator
2500 { $$ = DeclarationNode::newPointer( 0 ); }
2501 | ptrref_operator type_qualifier_list
2502 { $$ = DeclarationNode::newPointer( $2 ); }
2503 | ptrref_operator abstract_declarator
2504 { $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2505 | ptrref_operator type_qualifier_list abstract_declarator
2506 { $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2507 | '(' abstract_ptr ')'
2508 { $$ = $2; }
2509 ;
2510
2511abstract_array:
2512 array_dimension
2513 | '(' abstract_ptr ')' array_dimension
2514 { $$ = $2->addArray( $4 ); }
2515 | '(' abstract_array ')' multi_array_dimension // redundant parenthesis
2516 { $$ = $2->addArray( $4 ); }
2517 | '(' abstract_array ')' // redundant parenthesis
2518 { $$ = $2; }
2519 ;
2520
2521abstract_function:
2522 '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2523 { $$ = DeclarationNode::newFunction( nullptr, nullptr, $3, nullptr ); }
2524 | '(' abstract_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2525 { $$ = $2->addParamList( $6 ); }
2526 | '(' abstract_function ')' // redundant parenthesis
2527 { $$ = $2; }
2528 ;
2529
2530array_dimension:
2531 // Only the first dimension can be empty.
2532 '[' ']'
2533 { $$ = DeclarationNode::newArray( 0, 0, false ); }
2534 | '[' ']' multi_array_dimension
2535 { $$ = DeclarationNode::newArray( 0, 0, false )->addArray( $3 ); }
2536 | multi_array_dimension
2537 ;
2538
2539multi_array_dimension:
2540 '[' push assignment_expression pop ']'
2541 { $$ = DeclarationNode::newArray( $3, 0, false ); }
2542 | '[' push '*' pop ']' // C99
2543 { $$ = DeclarationNode::newVarArray( 0 ); }
2544 | multi_array_dimension '[' push assignment_expression pop ']'
2545 { $$ = $1->addArray( DeclarationNode::newArray( $4, 0, false ) ); }
2546 | multi_array_dimension '[' push '*' pop ']' // C99
2547 { $$ = $1->addArray( DeclarationNode::newVarArray( 0 ) ); }
2548 ;
2549
2550// This pattern parses a declaration of a parameter abstract variable or function prototype, i.e., there is no
2551// identifier to which the type applies, e.g.:
2552//
2553// int f( int ); // abstract variable parameter; no parameter name specified
2554// int f( int (int) ); // abstract function-prototype parameter; no parameter name specified
2555//
2556// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
2557// and functions versus pointers to arrays and functions.
2558
2559abstract_parameter_declarator:
2560 abstract_parameter_ptr
2561 | abstract_parameter_array attribute_list_opt
2562 { $$ = $1->addQualifiers( $2 ); }
2563 | abstract_parameter_function attribute_list_opt
2564 { $$ = $1->addQualifiers( $2 ); }
2565 ;
2566
2567abstract_parameter_ptr:
2568 ptrref_operator
2569 { $$ = DeclarationNode::newPointer( 0 ); }
2570 | ptrref_operator type_qualifier_list
2571 { $$ = DeclarationNode::newPointer( $2 ); }
2572 | ptrref_operator abstract_parameter_declarator
2573 { $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2574 | ptrref_operator type_qualifier_list abstract_parameter_declarator
2575 { $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2576 | '(' abstract_parameter_ptr ')'
2577 { $$ = $2; }
2578 ;
2579
2580abstract_parameter_array:
2581 array_parameter_dimension
2582 | '(' abstract_parameter_ptr ')' array_parameter_dimension
2583 { $$ = $2->addArray( $4 ); }
2584 | '(' abstract_parameter_array ')' multi_array_dimension // redundant parenthesis
2585 { $$ = $2->addArray( $4 ); }
2586 | '(' abstract_parameter_array ')' // redundant parenthesis
2587 { $$ = $2; }
2588 ;
2589
2590abstract_parameter_function:
2591 '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2592 { $$ = DeclarationNode::newFunction( nullptr, nullptr, $3, nullptr ); }
2593 | '(' abstract_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2594 { $$ = $2->addParamList( $6 ); }
2595 | '(' abstract_parameter_function ')' // redundant parenthesis
2596 { $$ = $2; }
2597 ;
2598
2599array_parameter_dimension:
2600 // Only the first dimension can be empty or have qualifiers.
2601 array_parameter_1st_dimension
2602 | array_parameter_1st_dimension multi_array_dimension
2603 { $$ = $1->addArray( $2 ); }
2604 | multi_array_dimension
2605 ;
2606
2607// The declaration of an array parameter has additional syntax over arrays in normal variable declarations:
2608//
2609// ISO/IEC 9899:1999 Section 6.7.5.2(1) : "The optional type qualifiers and the keyword static shall appear only in
2610// a declaration of a function parameter with an array type, and then only in the outermost array type derivation."
2611
2612array_parameter_1st_dimension:
2613 '[' ']'
2614 { $$ = DeclarationNode::newArray( 0, 0, false ); }
2615 // multi_array_dimension handles the '[' '*' ']' case
2616 | '[' push type_qualifier_list '*' pop ']' // remaining C99
2617 { $$ = DeclarationNode::newVarArray( $3 ); }
2618 | '[' push type_qualifier_list pop ']'
2619 { $$ = DeclarationNode::newArray( 0, $3, false ); }
2620 // multi_array_dimension handles the '[' assignment_expression ']' case
2621 | '[' push type_qualifier_list assignment_expression pop ']'
2622 { $$ = DeclarationNode::newArray( $4, $3, false ); }
2623 | '[' push STATIC type_qualifier_list_opt assignment_expression pop ']'
2624 { $$ = DeclarationNode::newArray( $5, $4, true ); }
2625 | '[' push type_qualifier_list STATIC assignment_expression pop ']'
2626 { $$ = DeclarationNode::newArray( $5, $3, true ); }
2627 ;
2628
2629// This pattern parses a declaration of an abstract variable, i.e., there is no identifier to which the type applies,
2630// e.g.:
2631//
2632// sizeof( int ); // abstract variable; no identifier name specified
2633//
2634// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
2635// and functions versus pointers to arrays and functions.
2636
2637variable_abstract_declarator:
2638 variable_abstract_ptr
2639 | variable_abstract_array attribute_list_opt
2640 { $$ = $1->addQualifiers( $2 ); }
2641 | variable_abstract_function attribute_list_opt
2642 { $$ = $1->addQualifiers( $2 ); }
2643 ;
2644
2645variable_abstract_ptr:
2646 ptrref_operator
2647 { $$ = DeclarationNode::newPointer( 0 ); }
2648 | ptrref_operator type_qualifier_list
2649 { $$ = DeclarationNode::newPointer( $2 ); }
2650 | ptrref_operator variable_abstract_declarator
2651 { $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2652 | ptrref_operator type_qualifier_list variable_abstract_declarator
2653 { $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2654 | '(' variable_abstract_ptr ')'
2655 { $$ = $2; }
2656 ;
2657
2658variable_abstract_array:
2659 array_dimension
2660 | '(' variable_abstract_ptr ')' array_dimension
2661 { $$ = $2->addArray( $4 ); }
2662 | '(' variable_abstract_array ')' multi_array_dimension // redundant parenthesis
2663 { $$ = $2->addArray( $4 ); }
2664 | '(' variable_abstract_array ')' // redundant parenthesis
2665 { $$ = $2; }
2666 ;
2667
2668variable_abstract_function:
2669 '(' variable_abstract_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2670 { $$ = $2->addParamList( $6 ); }
2671 | '(' variable_abstract_function ')' // redundant parenthesis
2672 { $$ = $2; }
2673 ;
2674
2675// This pattern parses a new-style declaration for a parameter variable or function prototype that is either an
2676// identifier or typedef name and allows the C99 array options, which can only appear in a parameter list.
2677
2678new_identifier_parameter_declarator_tuple: // CFA
2679 new_identifier_parameter_declarator_no_tuple
2680 | new_abstract_tuple
2681 | type_qualifier_list new_abstract_tuple
2682 { $$ = $2->addQualifiers( $1 ); }
2683 ;
2684
2685new_identifier_parameter_declarator_no_tuple: // CFA
2686 new_identifier_parameter_ptr
2687 | new_identifier_parameter_array
2688 ;
2689
2690new_identifier_parameter_ptr: // CFA
2691 ptrref_operator type_specifier
2692 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0 ) ); }
2693 | type_qualifier_list ptrref_operator type_specifier
2694 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1 ) ); }
2695 | ptrref_operator new_abstract_function
2696 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0 ) ); }
2697 | type_qualifier_list ptrref_operator new_abstract_function
2698 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1 ) ); }
2699 | ptrref_operator new_identifier_parameter_declarator_tuple
2700 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0 ) ); }
2701 | type_qualifier_list ptrref_operator new_identifier_parameter_declarator_tuple
2702 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1 ) ); }
2703 ;
2704
2705new_identifier_parameter_array: // CFA
2706 // Only the first dimension can be empty or have qualifiers. Empty dimension must be factored out due to
2707 // shift/reduce conflict with new-style empty (void) function return type.
2708 '[' ']' type_specifier
2709 { $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
2710 | new_array_parameter_1st_dimension type_specifier
2711 { $$ = $2->addNewArray( $1 ); }
2712 | '[' ']' multi_array_dimension type_specifier
2713 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
2714 | new_array_parameter_1st_dimension multi_array_dimension type_specifier
2715 { $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
2716 | multi_array_dimension type_specifier
2717 { $$ = $2->addNewArray( $1 ); }
2718 | '[' ']' new_identifier_parameter_ptr
2719 { $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
2720 | new_array_parameter_1st_dimension new_identifier_parameter_ptr
2721 { $$ = $2->addNewArray( $1 ); }
2722 | '[' ']' multi_array_dimension new_identifier_parameter_ptr
2723 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
2724 | new_array_parameter_1st_dimension multi_array_dimension new_identifier_parameter_ptr
2725 { $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
2726 | multi_array_dimension new_identifier_parameter_ptr
2727 { $$ = $2->addNewArray( $1 ); }
2728 ;
2729
2730new_array_parameter_1st_dimension:
2731 '[' push type_qualifier_list '*' pop ']' // remaining C99
2732 { $$ = DeclarationNode::newVarArray( $3 ); }
2733 | '[' push type_qualifier_list assignment_expression pop ']'
2734 { $$ = DeclarationNode::newArray( $4, $3, false ); }
2735 | '[' push declaration_qualifier_list assignment_expression pop ']'
2736 // declaration_qualifier_list must be used because of shift/reduce conflict with
2737 // assignment_expression, so a semantic check is necessary to preclude them as a type_qualifier cannot
2738 // appear in this context.
2739 { $$ = DeclarationNode::newArray( $4, $3, true ); }
2740 | '[' push declaration_qualifier_list type_qualifier_list assignment_expression pop ']'
2741 { $$ = DeclarationNode::newArray( $5, $4->addQualifiers( $3 ), true ); }
2742 ;
2743
2744// This pattern parses a new-style declaration of an abstract variable or function prototype, i.e., there is no
2745// identifier to which the type applies, e.g.:
2746//
2747// [int] f( int ); // abstract variable parameter; no parameter name specified
2748// [int] f( [int] (int) ); // abstract function-prototype parameter; no parameter name specified
2749//
2750// These rules need LR(3):
2751//
2752// new_abstract_tuple identifier_or_type_name
2753// '[' new_parameter_list ']' identifier_or_type_name '(' new_parameter_type_list_opt ')'
2754//
2755// since a function return type can be syntactically identical to a tuple type:
2756//
2757// [int, int] t;
2758// [int, int] f( int );
2759//
2760// Therefore, it is necessary to look at the token after identifier_or_type_name to know when to reduce
2761// new_abstract_tuple. To make this LR(1), several rules have to be flattened (lengthened) to allow the necessary
2762// lookahead. To accomplish this, new_abstract_declarator has an entry point without tuple, and tuple declarations are
2763// duplicated when appearing with new_function_specifier.
2764
2765new_abstract_declarator_tuple: // CFA
2766 new_abstract_tuple
2767 | type_qualifier_list new_abstract_tuple
2768 { $$ = $2->addQualifiers( $1 ); }
2769 | new_abstract_declarator_no_tuple
2770 ;
2771
2772new_abstract_declarator_no_tuple: // CFA
2773 new_abstract_ptr
2774 | new_abstract_array
2775 ;
2776
2777new_abstract_ptr: // CFA
2778 ptrref_operator type_specifier
2779 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0 ) ); }
2780 | type_qualifier_list ptrref_operator type_specifier
2781 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1 ) ); }
2782 | ptrref_operator new_abstract_function
2783 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0 ) ); }
2784 | type_qualifier_list ptrref_operator new_abstract_function
2785 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1 ) ); }
2786 | ptrref_operator new_abstract_declarator_tuple
2787 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0 ) ); }
2788 | type_qualifier_list ptrref_operator new_abstract_declarator_tuple
2789 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1 ) ); }
2790 ;
2791
2792new_abstract_array: // CFA
2793 // Only the first dimension can be empty. Empty dimension must be factored out due to shift/reduce conflict with
2794 // empty (void) function return type.
2795 '[' ']' type_specifier
2796 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
2797 | '[' ']' multi_array_dimension type_specifier
2798 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
2799 | multi_array_dimension type_specifier
2800 { $$ = $2->addNewArray( $1 ); }
2801 | '[' ']' new_abstract_ptr
2802 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
2803 | '[' ']' multi_array_dimension new_abstract_ptr
2804 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
2805 | multi_array_dimension new_abstract_ptr
2806 { $$ = $2->addNewArray( $1 ); }
2807 ;
2808
2809new_abstract_tuple: // CFA
2810 '[' push new_abstract_parameter_list pop ']'
2811 { $$ = DeclarationNode::newTuple( $3 ); }
2812 ;
2813
2814new_abstract_function: // CFA
2815 '[' ']' '(' new_parameter_type_list_opt ')'
2816 { $$ = DeclarationNode::newFunction( nullptr, DeclarationNode::newTuple( nullptr ), $4, nullptr ); }
2817 | new_abstract_tuple '(' push new_parameter_type_list_opt pop ')'
2818 { $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
2819 | new_function_return '(' push new_parameter_type_list_opt pop ')'
2820 { $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
2821 ;
2822
2823// 1) ISO/IEC 9899:1999 Section 6.7.2(2) : "At least one type specifier shall be given in the declaration specifiers in
2824// each declaration, and in the specifier-qualifier list in each structure declaration and type name."
2825//
2826// 2) ISO/IEC 9899:1999 Section 6.11.5(1) : "The placement of a storage-class specifier other than at the beginning of
2827// the declaration specifiers in a declaration is an obsolescent feature."
2828//
2829// 3) ISO/IEC 9899:1999 Section 6.11.6(1) : "The use of function declarators with empty parentheses (not
2830// prototype-format parameter type declarators) is an obsolescent feature."
2831//
2832// 4) ISO/IEC 9899:1999 Section 6.11.7(1) : "The use of function definitions with separate parameter identifier and
2833// declaration lists (not prototype-format parameter type and identifier declarators) is an obsolescent feature.
2834
2835//************************* MISCELLANEOUS ********************************
2836
2837comma_opt: // redundant comma
2838 // empty
2839 | ','
2840 ;
2841
2842assignment_opt:
2843 // empty
2844 { $$ = 0; }
2845 | '=' assignment_expression
2846 { $$ = $2; }
2847 ;
2848
2849%%
2850// ----end of grammar----
2851
2852extern char *yytext;
2853
2854void yyerror( const char * ) {
2855 cout << "Error ";
2856 if ( yyfilename ) {
2857 cout << "in file " << yyfilename << " ";
2858 } // if
2859 cout << "at line " << yylineno << " reading token \"" << (yytext[0] == '\0' ? "EOF" : yytext) << "\"" << endl;
2860}
2861
2862// Local Variables: //
2863// mode: c++ //
2864// tab-width: 4 //
2865// compile-command: "make install" //
2866// End: //
Note: See TracBrowser for help on using the repository browser.