source: src/Parser/parser.yy@ bd87b138

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 with_gc
Last change on this file since bd87b138 was f6e3e34, checked in by Rob Schluntz <rschlunt@…>, 8 years ago

Add StaticAssertDecl node
  • Property mode set to 100644
File size: 122.0 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// parser.yy --
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 : Thu Mar 22 16:56:21 2018
13// Update Count : 3125
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#define YYERROR_VERBOSE // more information in syntax errors
46
47#undef __GNUC_MINOR__
48
49#include <cstdio>
50#include <stack>
51using namespace std;
52
53#include "ParseNode.h"
54#include "TypedefTable.h"
55#include "TypeData.h"
56#include "LinkageSpec.h"
57#include "Common/SemanticError.h" // error_str
58#include "Common/utility.h" // for maybeMoveBuild, maybeBuild, CodeLo...
59
60extern DeclarationNode * parseTree;
61extern LinkageSpec::Spec linkage;
62extern TypedefTable typedefTable;
63
64stack< LinkageSpec::Spec > linkageStack;
65
66bool appendStr( string & to, string & from ) {
67 // 1. Multiple strings are concatenated into a single string but not combined internally. The reason is that
68 // "\x12" "3" is treated as 2 characters versus 1 because "escape sequences are converted into single members of
69 // the execution character set just prior to adjacent string literal concatenation" (C11, Section 6.4.5-8). It is
70 // easier to let the C compiler handle this case.
71 //
72 // 2. String encodings are transformed into canonical form (one encoding at start) so the encoding can be found
73 // without searching the string, e.g.: "abc" L"def" L"ghi" => L"abc" "def" "ghi". Multiple encodings must match,
74 // i.e., u"a" U"b" L"c" is disallowed.
75
76 if ( from[0] != '"' ) { // encoding ?
77 if ( to[0] != '"' ) { // encoding ?
78 if ( to[0] != from[0] || to[1] != from[1] ) { // different encodings ?
79 yyerror( "non-matching string encodings for string-literal concatenation" );
80 return false; // parse error, must call YYERROR in action
81 } else if ( from[1] == '8' ) {
82 from.erase( 0, 1 ); // remove 2nd encoding
83 } // if
84 } else {
85 if ( from[1] == '8' ) { // move encoding to start
86 to = "u8" + to;
87 from.erase( 0, 1 ); // remove 2nd encoding
88 } else {
89 to = from[0] + to;
90 } // if
91 } // if
92 from.erase( 0, 1 ); // remove 2nd encoding
93 } // if
94 to += " " + from; // concatenated into single string
95 return true;
96} // appendStr
97
98DeclarationNode * distAttr( DeclarationNode * specifier, DeclarationNode * declList ) {
99 // distribute declaration_specifier across all declared variables, e.g., static, const, __attribute__.
100 DeclarationNode * cur = declList, * cl = (new DeclarationNode)->addType( specifier );
101 //cur->addType( specifier );
102 for ( cur = dynamic_cast< DeclarationNode * >( cur->get_next() ); cur != nullptr; cur = dynamic_cast< DeclarationNode * >( cur->get_next() ) ) {
103 cl->cloneBaseType( cur );
104 } // for
105 declList->addType( cl );
106// delete cl;
107 return declList;
108} // distAttr
109
110void distExt( DeclarationNode * declaration ) {
111 // distribute EXTENSION across all declarations
112 for ( DeclarationNode *iter = declaration; iter != nullptr; iter = (DeclarationNode *)iter->get_next() ) {
113 iter->set_extension( true );
114 } // for
115} // distExt
116
117// There is an ambiguity for inline generic-routine return-types and generic routines.
118// forall( otype T ) struct S { int i; } bar( T ) {}
119// Does the forall bind to the struct or the routine, and how would it be possible to explicitly specify the binding.
120// forall( otype T ) struct S { int T; } forall( otype W ) bar( W ) {}
121
122void rebindForall( DeclarationNode * declSpec, DeclarationNode * funcDecl ) {
123 if ( declSpec->type->kind == TypeData::Aggregate ) { // return is aggregate definition
124 funcDecl->type->forall = declSpec->type->aggregate.params; // move forall from aggregate to function type
125 declSpec->type->aggregate.params = nullptr;
126 } // if
127} // rebindForall
128
129NameExpr * build_postfix_name( const string * name ) {
130 NameExpr * new_name = build_varref( new string( "?`" + *name ) );
131 delete name;
132 return new_name;
133} // build_postfix_name
134
135bool forall = false; // aggregate have one or more forall qualifiers ?
136
137// https://www.gnu.org/software/bison/manual/bison.html#Location-Type
138#define YYLLOC_DEFAULT(Cur, Rhs, N) \
139if ( N ) { \
140 (Cur).first_line = YYRHSLOC( Rhs, 1 ).first_line; \
141 (Cur).first_column = YYRHSLOC( Rhs, 1 ).first_column; \
142 (Cur).last_line = YYRHSLOC( Rhs, N ).last_line; \
143 (Cur).last_column = YYRHSLOC( Rhs, N ).last_column; \
144 (Cur).filename = YYRHSLOC( Rhs, 1 ).filename; \
145} else { \
146 (Cur).first_line = (Cur).last_line = YYRHSLOC( Rhs, 0 ).last_line; \
147 (Cur).first_column = (Cur).last_column = YYRHSLOC( Rhs, 0 ).last_column; \
148 (Cur).filename = YYRHSLOC( Rhs, 0 ).filename; \
149}
150%}
151
152%define parse.error verbose
153
154// Types declaration for productions
155%union
156{
157 Token tok;
158 ParseNode * pn;
159 ExpressionNode * en;
160 DeclarationNode * decl;
161 DeclarationNode::Aggregate aggKey;
162 DeclarationNode::TypeClass tclass;
163 StatementNode * sn;
164 WaitForStmt * wfs;
165 Expression * constant;
166 IfCtl * ifctl;
167 ForCtl * fctl;
168 LabelNode * label;
169 InitializerNode * in;
170 OperKinds op;
171 std::string * str;
172 bool flag;
173 CatchStmt::Kind catch_kind;
174}
175
176//************************* TERMINAL TOKENS ********************************
177
178// keywords
179%token TYPEDEF
180%token EXTERN STATIC AUTO REGISTER
181%token THREADLOCAL // C11
182%token INLINE FORTRAN // C99, extension ISO/IEC 9899:1999 Section J.5.9(1)
183%token NORETURN // C11
184%token CONST VOLATILE
185%token RESTRICT // C99
186%token ATOMIC // C11
187%token FORALL MUTEX VIRTUAL // CFA
188%token VOID CHAR SHORT INT LONG FLOAT DOUBLE SIGNED UNSIGNED
189%token BOOL COMPLEX IMAGINARY // C99
190%token INT128 FLOAT80 FLOAT128 // GCC
191%token ZERO_T ONE_T // CFA
192%token VALIST // GCC
193%token TYPEOF LABEL // GCC
194%token ENUM STRUCT UNION
195%token EXCEPTION // CFA
196%token COROUTINE MONITOR THREAD // CFA
197%token OTYPE FTYPE DTYPE TTYPE TRAIT // CFA
198%token SIZEOF OFFSETOF
199%token ATTRIBUTE EXTENSION // GCC
200%token IF ELSE SWITCH CASE DEFAULT DO WHILE FOR BREAK CONTINUE GOTO RETURN
201%token CHOOSE DISABLE ENABLE FALLTHRU FALLTHROUGH TRY CATCH CATCHRESUME FINALLY THROW THROWRESUME AT WITH WHEN WAITFOR // CFA
202%token ASM // C99, extension ISO/IEC 9899:1999 Section J.5.10(1)
203%token ALIGNAS ALIGNOF GENERIC STATICASSERT // C11
204
205// names and constants: lexer differentiates between identifier and typedef names
206%token<tok> IDENTIFIER QUOTED_IDENTIFIER TYPEDEFname TYPEGENname
207%token<tok> TIMEOUT WOR
208%token<tok> ATTR_IDENTIFIER ATTR_TYPEDEFname ATTR_TYPEGENname
209%token<tok> INTEGERconstant CHARACTERconstant STRINGliteral
210// Floating point constant is broken into three kinds of tokens because of the ambiguity with tuple indexing and
211// overloading constants 0/1, e.g., x.1 is lexed as (x)(.1), where (.1) is a factional constant, but is semantically
212// converted into the tuple index (.)(1). e.g., 3.x
213%token<tok> FLOATING_DECIMALconstant FLOATING_FRACTIONconstant FLOATINGconstant
214
215// multi-character operators
216%token ARROW // ->
217%token ICR DECR // ++ --
218%token LS RS // << >>
219%token LE GE EQ NE // <= >= == !=
220%token ANDAND OROR // && ||
221%token ELLIPSIS // ...
222
223%token EXPassign MULTassign DIVassign MODassign // \= *= /= %=
224%token PLUSassign MINUSassign // += -=
225%token LSassign RSassign // <<= >>=
226%token ANDassign ERassign ORassign // &= ^= |=
227
228%token ATassign // @=
229
230%type<tok> identifier no_attr_identifier
231%type<tok> identifier_or_type_name no_attr_identifier_or_type_name attr_name
232%type<tok> quasi_keyword
233%type<constant> string_literal
234%type<str> string_literal_list
235
236// expressions
237%type<en> constant
238%type<en> tuple tuple_expression_list
239%type<op> ptrref_operator unary_operator assignment_operator
240%type<en> primary_expression postfix_expression unary_expression
241%type<en> cast_expression exponential_expression multiplicative_expression additive_expression
242%type<en> shift_expression relational_expression equality_expression
243%type<en> AND_expression exclusive_OR_expression inclusive_OR_expression
244%type<en> logical_AND_expression logical_OR_expression
245%type<en> conditional_expression constant_expression assignment_expression assignment_expression_opt
246%type<en> comma_expression comma_expression_opt
247%type<en> argument_expression_list argument_expression default_initialize_opt
248%type<ifctl> if_control_expression
249%type<fctl> for_control_expression
250%type<en> subrange
251%type<decl> asm_name_opt
252%type<en> asm_operands_opt asm_operands_list asm_operand
253%type<label> label_list
254%type<en> asm_clobbers_list_opt
255%type<flag> asm_volatile_opt
256%type<en> handler_predicate_opt
257
258// statements
259%type<sn> statement labeled_statement compound_statement
260%type<sn> statement_decl statement_decl_list statement_list_nodecl
261%type<sn> selection_statement
262%type<sn> switch_clause_list_opt switch_clause_list
263%type<en> case_value
264%type<sn> case_clause case_value_list case_label case_label_list
265%type<sn> iteration_statement jump_statement
266%type<sn> expression_statement asm_statement
267%type<sn> with_statement
268%type<en> with_clause_opt
269%type<sn> exception_statement handler_clause finally_clause
270%type<catch_kind> handler_key
271%type<sn> mutex_statement
272%type<en> when_clause when_clause_opt waitfor timeout
273%type<sn> waitfor_statement
274%type<wfs> waitfor_clause
275
276// declarations
277%type<decl> abstract_declarator abstract_ptr abstract_array abstract_function array_dimension multi_array_dimension
278%type<decl> abstract_parameter_declarator abstract_parameter_ptr abstract_parameter_array abstract_parameter_function array_parameter_dimension array_parameter_1st_dimension
279%type<decl> abstract_parameter_declaration
280
281%type<aggKey> aggregate_key
282%type<decl> aggregate_type aggregate_type_nobody
283
284%type<decl> assertion assertion_list_opt
285
286%type<en> bit_subrange_size_opt bit_subrange_size
287
288%type<decl> basic_declaration_specifier basic_type_name basic_type_specifier direct_type indirect_type
289
290%type<decl> trait_declaration trait_declaration_list trait_declaring_list trait_specifier
291
292%type<decl> declaration declaration_list declaration_list_opt declaration_qualifier_list
293%type<decl> declaration_specifier declaration_specifier_nobody declarator declaring_list
294
295%type<decl> elaborated_type elaborated_type_nobody
296
297%type<decl> enumerator_list enum_type enum_type_nobody
298%type<en> enumerator_value_opt
299
300%type<decl> exception_declaration external_definition external_definition_list external_definition_list_opt
301
302%type<decl> field_declaration field_declaration_list field_declarator field_declaring_list
303%type<en> field field_list field_name fraction_constants
304
305%type<decl> external_function_definition function_definition function_array function_declarator function_no_ptr function_ptr
306
307%type<decl> identifier_parameter_declarator identifier_parameter_ptr identifier_parameter_array identifier_parameter_function
308%type<decl> identifier_list
309
310%type<decl> cfa_abstract_array cfa_abstract_declarator_no_tuple cfa_abstract_declarator_tuple
311%type<decl> cfa_abstract_function cfa_abstract_parameter_declaration cfa_abstract_parameter_list
312%type<decl> cfa_abstract_ptr cfa_abstract_tuple
313
314%type<decl> cfa_array_parameter_1st_dimension
315
316%type<decl> cfa_trait_declaring_list cfa_declaration cfa_field_declaring_list
317%type<decl> cfa_function_declaration cfa_function_return cfa_function_specifier
318
319%type<decl> cfa_identifier_parameter_array cfa_identifier_parameter_declarator_no_tuple
320%type<decl> cfa_identifier_parameter_declarator_tuple cfa_identifier_parameter_ptr
321
322%type<decl> cfa_parameter_declaration cfa_parameter_list cfa_parameter_type_list_opt
323
324%type<decl> cfa_typedef_declaration cfa_variable_declaration cfa_variable_specifier
325
326%type<decl> c_declaration static_assert
327%type<decl> KR_function_declarator KR_function_no_ptr KR_function_ptr KR_function_array
328%type<decl> KR_declaration_list KR_declaration_list_opt
329
330%type<decl> parameter_declaration parameter_list parameter_type_list_opt
331
332%type<decl> paren_identifier paren_type
333
334%type<decl> storage_class storage_class_list
335
336%type<decl> sue_declaration_specifier sue_declaration_specifier_nobody sue_type_specifier sue_type_specifier_nobody
337
338%type<tclass> type_class
339%type<decl> type_declarator type_declarator_name type_declaring_list
340
341%type<decl> type_declaration_specifier type_type_specifier type_name typegen_name
342%type<decl> typedef typedef_declaration typedef_expression
343
344%type<decl> variable_type_redeclarator type_ptr type_array type_function
345
346%type<decl> type_parameter_redeclarator type_parameter_ptr type_parameter_array type_parameter_function
347
348%type<decl> type type_no_function
349%type<decl> type_parameter type_parameter_list type_initializer_opt
350
351%type<en> type_list
352
353%type<decl> type_qualifier type_qualifier_name forall type_qualifier_list_opt type_qualifier_list
354%type<decl> type_specifier type_specifier_nobody
355
356%type<decl> variable_declarator variable_ptr variable_array variable_function
357%type<decl> variable_abstract_declarator variable_abstract_ptr variable_abstract_array variable_abstract_function
358
359%type<decl> attribute_list_opt attribute_list attribute_name_list attribute attribute_name
360
361// initializers
362%type<in> initializer initializer_list initializer_opt
363
364// designators
365%type<en> designator designator_list designation
366
367
368// Handle shift/reduce conflict for dangling else by shifting the ELSE token. For example, this string is ambiguous:
369// .---------. matches IF '(' comma_expression ')' statement . (reduce)
370// if ( C ) S1 else S2
371// `-----------------' matches IF '(' comma_expression ')' statement . (shift) ELSE statement */
372// Similar issues exit with the waitfor statement.
373
374// Order of these lines matters (low-to-high precedence). THEN is left associative over WOR/TIMEOUT/ELSE, WOR is left
375// associative over TIMEOUT/ELSE, and TIMEOUT is left associative over ELSE.
376%precedence THEN // rule precedence for IF/WAITFOR statement
377%precedence WOR // token precedence for start of WOR in WAITFOR statement
378%precedence TIMEOUT // token precedence for start of TIMEOUT in WAITFOR statement
379%precedence ELSE // token precedence for start of else clause in IF/WAITFOR statement
380
381// Handle shift/reduce conflict for generic type by shifting the '(' token. For example, this string is ambiguous:
382// forall( otype T ) struct Foo { T v; };
383// .-----. matches pointer to function returning a generic (which is impossible without a type)
384// Foo ( *fp )( int );
385// `---' matches start of TYPEGENname '('
386// Must be:
387// Foo( int ) ( *fp )( int );
388
389// Order of these lines matters (low-to-high precedence).
390%precedence TYPEGENname
391%precedence '('
392
393%locations // support location tracking for error messages
394
395%start translation_unit // parse-tree root
396
397%%
398//************************* Namespace Management ********************************
399
400// The grammar in the ANSI C standard is not strictly context-free, since it relies upon the distinct terminal symbols
401// "identifier", "TYPEDEFname", and "TYPEGENname" that are lexically identical. While it is possible to write a purely
402// context-free grammar, such a grammar would obscure the relationship between syntactic and semantic constructs.
403// Hence, this grammar uses the ANSI style.
404//
405// Cforall compounds this problem by introducing type names local to the scope of a declaration (for instance, those
406// introduced through "forall" qualifiers), and by introducing "type generators" -- parameterized types. This latter
407// type name creates a third class of identifiers that must be distinguished by the scanner.
408//
409// Since the scanner cannot distinguish among the different classes of identifiers without some context information, it
410// accesses a data structure (TypedefTable) to allow classification of an identifier that it has just read. Semantic
411// actions during the parser update this data structure when the class of identifiers change.
412//
413// Because the Cforall language is block-scoped, there is the possibility that an identifier can change its class in a
414// local scope; it must revert to its original class at the end of the block. Since type names can be local to a
415// particular declaration, each declaration is itself a scope. This requires distinguishing between type names that are
416// local to the current declaration scope and those that persist past the end of the declaration (i.e., names defined in
417// "typedef" or "otype" declarations).
418//
419// The non-terminals "push" and "pop" derive the empty string; their only use is to denote the opening and closing of
420// scopes. Every push must have a matching pop, although it is regrettable the matching pairs do not always occur
421// within the same rule. These non-terminals may appear in more contexts than strictly necessary from a semantic point
422// of view. Unfortunately, these extra rules are necessary to prevent parsing conflicts -- the parser may not have
423// enough context and look-ahead information to decide whether a new scope is necessary, so the effect of these extra
424// rules is to open a new scope unconditionally. As the grammar evolves, it may be neccesary to add or move around
425// "push" and "pop" nonterminals to resolve conflicts of this sort.
426
427push:
428 { typedefTable.enterScope(); }
429 ;
430
431pop:
432 { typedefTable.leaveScope(); }
433 ;
434
435//************************* CONSTANTS ********************************
436
437constant:
438 // ENUMERATIONconstant is not included here; it is treated as a variable with type "enumeration constant".
439 INTEGERconstant { $$ = new ExpressionNode( build_constantInteger( *$1 ) ); }
440 | FLOATING_DECIMALconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); }
441 | FLOATING_FRACTIONconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); }
442 | FLOATINGconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); }
443 | CHARACTERconstant { $$ = new ExpressionNode( build_constantChar( *$1 ) ); }
444 ;
445
446quasi_keyword: // CFA
447 TIMEOUT
448 | WOR
449 ;
450
451identifier:
452 IDENTIFIER
453 | ATTR_IDENTIFIER // CFA
454 | quasi_keyword
455 ;
456
457no_attr_identifier:
458 IDENTIFIER
459 | quasi_keyword
460 ;
461
462string_literal:
463 string_literal_list { $$ = build_constantStr( *$1 ); }
464 ;
465
466string_literal_list: // juxtaposed strings are concatenated
467 STRINGliteral { $$ = $1; } // conversion from tok to str
468 | string_literal_list STRINGliteral
469 {
470 if ( ! appendStr( *$1, *$2 ) ) YYERROR; // append 2nd juxtaposed string to 1st
471 delete $2; // allocated by lexer
472 $$ = $1; // conversion from tok to str
473 }
474 ;
475
476//************************* EXPRESSIONS ********************************
477
478primary_expression:
479 IDENTIFIER // typedef name cannot be used as a variable name
480 { $$ = new ExpressionNode( build_varref( $1 ) ); }
481 | quasi_keyword
482 { $$ = new ExpressionNode( build_varref( $1 ) ); }
483 | tuple
484 | '(' comma_expression ')'
485 { $$ = $2; }
486 | '(' compound_statement ')' // GCC, lambda expression
487 { $$ = new ExpressionNode( new StmtExpr( dynamic_cast< CompoundStmt * >(maybeMoveBuild< Statement >($2) ) ) ); }
488 | constant '`' IDENTIFIER // CFA, postfix call
489 { $$ = new ExpressionNode( build_func( new ExpressionNode( build_postfix_name( $3 ) ), $1 ) ); }
490 | string_literal '`' IDENTIFIER // CFA, postfix call
491 { $$ = new ExpressionNode( build_func( new ExpressionNode( build_postfix_name( $3 ) ), new ExpressionNode( $1 ) ) ); }
492 | IDENTIFIER '`' IDENTIFIER // CFA, postfix call
493 { $$ = new ExpressionNode( build_func( new ExpressionNode( build_postfix_name( $3 ) ), new ExpressionNode( build_varref( $1 ) ) ) ); }
494 | tuple '`' IDENTIFIER // CFA, postfix call
495 { $$ = new ExpressionNode( build_func( new ExpressionNode( build_postfix_name( $3 ) ), $1 ) ); }
496 | '(' comma_expression ')' '`' IDENTIFIER // CFA, postfix call
497 { $$ = new ExpressionNode( build_func( new ExpressionNode( build_postfix_name( $5 ) ), $2 ) ); }
498 | type_name '.' no_attr_identifier // CFA, nested type
499 { SemanticError( yylloc, "Qualified names are currently unimplemented." ); $$ = nullptr; } // FIX ME
500 | type_name '.' '[' push field_list pop ']' // CFA, nested type / tuple field selector
501 { SemanticError( yylloc, "Qualified names are currently unimplemented." ); $$ = nullptr; } // FIX ME
502 | GENERIC '(' assignment_expression ',' generic_assoc_list ')' // C11
503 { SemanticError( yylloc, "_Generic is currently unimplemented." ); $$ = nullptr; } // FIX ME
504 ;
505
506generic_assoc_list: // C11
507 | generic_association
508 | generic_assoc_list ',' generic_association
509 ;
510
511generic_association: // C11
512 type_no_function ':' assignment_expression
513 | DEFAULT ':' assignment_expression
514 ;
515
516postfix_expression:
517 primary_expression
518 | postfix_expression '[' push assignment_expression pop ']'
519 // CFA, comma_expression disallowed in this context because it results in a common user error: subscripting a
520 // matrix with x[i,j] instead of x[i][j]. While this change is not backwards compatible, there seems to be
521 // little advantage to this feature and many disadvantages. It is possible to write x[(i,j)] in CFA, which is
522 // equivalent to the old x[i,j].
523 { $$ = new ExpressionNode( build_binary_val( OperKinds::Index, $1, $4 ) ); }
524 | postfix_expression '{' argument_expression_list '}' // CFA, constructor call
525 {
526 Token fn;
527 fn.str = new std::string( "?{}" ); // location undefined - use location of '{'?
528 $$ = new ExpressionNode( new ConstructorExpr( build_func( new ExpressionNode( build_varref( fn ) ), (ExpressionNode *)( $1 )->set_last( $3 ) ) ) );
529 }
530 | postfix_expression '(' argument_expression_list ')'
531 { $$ = new ExpressionNode( build_func( $1, $3 ) ); }
532 | postfix_expression '.' no_attr_identifier
533 { $$ = new ExpressionNode( build_fieldSel( $1, build_varref( $3 ) ) ); }
534 | postfix_expression '.' '[' push field_list pop ']' // CFA, tuple field selector
535 { $$ = new ExpressionNode( build_fieldSel( $1, build_tuple( $5 ) ) ); }
536 | postfix_expression FLOATING_FRACTIONconstant // CFA, tuple index
537 { $$ = new ExpressionNode( build_fieldSel( $1, build_field_name_FLOATING_FRACTIONconstant( *$2 ) ) ); }
538 | postfix_expression ARROW no_attr_identifier
539 {
540 $$ = new ExpressionNode( build_pfieldSel( $1, *$3 == "0" || *$3 == "1" ? build_constantInteger( *$3 ) : build_varref( $3 ) ) );
541 }
542 | postfix_expression ARROW '[' push field_list pop ']' // CFA, tuple field selector
543 { $$ = new ExpressionNode( build_pfieldSel( $1, build_tuple( $5 ) ) ); }
544 | postfix_expression ARROW INTEGERconstant // CFA, tuple index
545 { $$ = new ExpressionNode( build_pfieldSel( $1, build_constantInteger( *$3 ) ) ); }
546 | postfix_expression ICR
547 { $$ = new ExpressionNode( build_unary_ptr( OperKinds::IncrPost, $1 ) ); }
548 | postfix_expression DECR
549 { $$ = new ExpressionNode( build_unary_ptr( OperKinds::DecrPost, $1 ) ); }
550 | '(' type_no_function ')' '{' initializer_list comma_opt '}' // C99, compound-literal
551 { $$ = new ExpressionNode( build_compoundLiteral( $2, new InitializerNode( $5, true ) ) ); }
552 | '(' type_no_function ')' '@' '{' initializer_list comma_opt '}' // CFA, explicit C compound-literal
553 { $$ = new ExpressionNode( build_compoundLiteral( $2, (new InitializerNode( $6, true ))->set_maybeConstructed( false ) ) ); }
554 | '^' primary_expression '{' argument_expression_list '}' // CFA
555 {
556 Token fn;
557 fn.str = new string( "^?{}" ); // location undefined
558 $$ = new ExpressionNode( build_func( new ExpressionNode( build_varref( fn ) ), (ExpressionNode *)( $2 )->set_last( $4 ) ) );
559 }
560 ;
561
562argument_expression_list:
563 argument_expression
564 | argument_expression_list ',' argument_expression
565 { $$ = (ExpressionNode *)( $1->set_last( $3 )); }
566 ;
567
568argument_expression:
569 // empty
570 { $$ = nullptr; }
571 // | '@' // use default argument
572 // { $$ = new ExpressionNode( build_constantInteger( *new string( "2" ) ) ); }
573 | assignment_expression
574 ;
575
576field_list: // CFA, tuple field selector
577 field
578 | field_list ',' field { $$ = (ExpressionNode *)$1->set_last( $3 ); }
579 ;
580
581field: // CFA, tuple field selector
582 field_name
583 | FLOATING_DECIMALconstant field
584 { $$ = new ExpressionNode( build_fieldSel( new ExpressionNode( build_field_name_FLOATING_DECIMALconstant( *$1 ) ), maybeMoveBuild<Expression>( $2 ) ) ); }
585 | FLOATING_DECIMALconstant '[' push field_list pop ']'
586 { $$ = new ExpressionNode( build_fieldSel( new ExpressionNode( build_field_name_FLOATING_DECIMALconstant( *$1 ) ), build_tuple( $4 ) ) ); }
587 | field_name '.' field
588 { $$ = new ExpressionNode( build_fieldSel( $1, maybeMoveBuild<Expression>( $3 ) ) ); }
589 | field_name '.' '[' push field_list pop ']'
590 { $$ = new ExpressionNode( build_fieldSel( $1, build_tuple( $5 ) ) ); }
591 | field_name ARROW field
592 { $$ = new ExpressionNode( build_pfieldSel( $1, maybeMoveBuild<Expression>( $3 ) ) ); }
593 | field_name ARROW '[' push field_list pop ']'
594 { $$ = new ExpressionNode( build_pfieldSel( $1, build_tuple( $5 ) ) ); }
595 ;
596
597field_name:
598 INTEGERconstant fraction_constants
599 { $$ = new ExpressionNode( build_field_name_fraction_constants( build_constantInteger( *$1 ), $2 ) ); }
600 | FLOATINGconstant fraction_constants
601 { $$ = new ExpressionNode( build_field_name_fraction_constants( build_field_name_FLOATINGconstant( *$1 ), $2 ) ); }
602 | no_attr_identifier fraction_constants
603 {
604 $$ = new ExpressionNode( build_field_name_fraction_constants( build_varref( $1 ), $2 ) );
605 }
606 ;
607
608fraction_constants:
609 // empty
610 { $$ = nullptr; }
611 | fraction_constants FLOATING_FRACTIONconstant
612 {
613 Expression * constant = build_field_name_FLOATING_FRACTIONconstant( *$2 );
614 $$ = $1 != nullptr ? new ExpressionNode( build_fieldSel( $1, constant ) ) : new ExpressionNode( constant );
615 }
616 ;
617
618unary_expression:
619 postfix_expression
620 // first location where constant/string can have operator applied: sizeof 3/sizeof "abc" still requires
621 // semantics checks, e.g., ++3, 3--, *3, &&3
622 | constant
623 { $$ = $1; }
624 | string_literal
625 { $$ = new ExpressionNode( $1 ); }
626 | EXTENSION cast_expression // GCC
627 { $$ = $2->set_extension( true ); }
628 // '*' ('&') is separated from unary_operator because of shift/reduce conflict in:
629 // { * X; } // dereference X
630 // { * int X; } // CFA declaration of pointer to int
631 | ptrref_operator cast_expression // CFA
632 {
633 switch ( $1 ) {
634 case OperKinds::AddressOf:
635 $$ = new ExpressionNode( new AddressExpr( maybeMoveBuild< Expression >( $2 ) ) );
636 break;
637 case OperKinds::PointTo:
638 $$ = new ExpressionNode( build_unary_val( $1, $2 ) );
639 break;
640 case OperKinds::And:
641 $$ = new ExpressionNode( new AddressExpr( new AddressExpr( maybeMoveBuild< Expression >( $2 ) ) ) );
642 break;
643 default:
644 assert( false );
645 }
646 }
647 | unary_operator cast_expression
648 { $$ = new ExpressionNode( build_unary_val( $1, $2 ) ); }
649 | ICR unary_expression
650 { $$ = new ExpressionNode( build_unary_ptr( OperKinds::Incr, $2 ) ); }
651 | DECR unary_expression
652 { $$ = new ExpressionNode( build_unary_ptr( OperKinds::Decr, $2 ) ); }
653 | SIZEOF unary_expression
654 { $$ = new ExpressionNode( new SizeofExpr( maybeMoveBuild< Expression >( $2 ) ) ); }
655 | SIZEOF '(' type_no_function ')'
656 { $$ = new ExpressionNode( new SizeofExpr( maybeMoveBuildType( $3 ) ) ); }
657 | ALIGNOF unary_expression // GCC, variable alignment
658 { $$ = new ExpressionNode( new AlignofExpr( maybeMoveBuild< Expression >( $2 ) ) ); }
659 | ALIGNOF '(' type_no_function ')' // GCC, type alignment
660 { $$ = new ExpressionNode( new AlignofExpr( maybeMoveBuildType( $3 ) ) ); }
661 | OFFSETOF '(' type_no_function ',' no_attr_identifier ')'
662 { $$ = new ExpressionNode( build_offsetOf( $3, build_varref( $5 ) ) ); }
663 | ATTR_IDENTIFIER
664 { $$ = new ExpressionNode( new AttrExpr( build_varref( $1 ), maybeMoveBuild< Expression >( (ExpressionNode *)nullptr ) ) ); }
665 | ATTR_IDENTIFIER '(' argument_expression ')'
666 { $$ = new ExpressionNode( new AttrExpr( build_varref( $1 ), maybeMoveBuild< Expression >( $3 ) ) ); }
667 | ATTR_IDENTIFIER '(' type ')'
668 { $$ = new ExpressionNode( new AttrExpr( build_varref( $1 ), maybeMoveBuildType( $3 ) ) ); }
669 ;
670
671ptrref_operator:
672 '*' { $$ = OperKinds::PointTo; }
673 | '&' { $$ = OperKinds::AddressOf; }
674 // GCC, address of label must be handled by semantic check for ref,ref,label
675 | ANDAND { $$ = OperKinds::And; }
676 ;
677
678unary_operator:
679 '+' { $$ = OperKinds::UnPlus; }
680 | '-' { $$ = OperKinds::UnMinus; }
681 | '!' { $$ = OperKinds::Neg; }
682 | '~' { $$ = OperKinds::BitNeg; }
683 ;
684
685cast_expression:
686 unary_expression
687 | '(' type_no_function ')' cast_expression
688 { $$ = new ExpressionNode( build_cast( $2, $4 ) ); }
689 // VIRTUAL cannot be opt because of look ahead issues
690 | '(' VIRTUAL ')' cast_expression
691 { $$ = new ExpressionNode( new VirtualCastExpr( maybeMoveBuild< Expression >( $4 ), maybeMoveBuildType( nullptr ) ) ); }
692 | '(' VIRTUAL type_no_function ')' cast_expression
693 { $$ = new ExpressionNode( new VirtualCastExpr( maybeMoveBuild< Expression >( $5 ), maybeMoveBuildType( $3 ) ) ); }
694// | '(' type_no_function ')' tuple
695// { $$ = new ExpressionNode( build_cast( $2, $4 ) ); }
696 ;
697
698exponential_expression:
699 cast_expression
700 | exponential_expression '\\' cast_expression
701 { $$ = new ExpressionNode( build_binary_val( OperKinds::Exp, $1, $3 ) ); }
702 ;
703
704multiplicative_expression:
705 exponential_expression
706 | multiplicative_expression '*' exponential_expression
707 { $$ = new ExpressionNode( build_binary_val( OperKinds::Mul, $1, $3 ) ); }
708 | multiplicative_expression '/' exponential_expression
709 { $$ = new ExpressionNode( build_binary_val( OperKinds::Div, $1, $3 ) ); }
710 | multiplicative_expression '%' exponential_expression
711 { $$ = new ExpressionNode( build_binary_val( OperKinds::Mod, $1, $3 ) ); }
712 ;
713
714additive_expression:
715 multiplicative_expression
716 | additive_expression '+' multiplicative_expression
717 { $$ = new ExpressionNode( build_binary_val( OperKinds::Plus, $1, $3 ) ); }
718 | additive_expression '-' multiplicative_expression
719 { $$ = new ExpressionNode( build_binary_val( OperKinds::Minus, $1, $3 ) ); }
720 ;
721
722shift_expression:
723 additive_expression
724 | shift_expression LS additive_expression
725 { $$ = new ExpressionNode( build_binary_val( OperKinds::LShift, $1, $3 ) ); }
726 | shift_expression RS additive_expression
727 { $$ = new ExpressionNode( build_binary_val( OperKinds::RShift, $1, $3 ) ); }
728 ;
729
730relational_expression:
731 shift_expression
732 | relational_expression '<' shift_expression
733 { $$ = new ExpressionNode( build_binary_val( OperKinds::LThan, $1, $3 ) ); }
734 | relational_expression '>' shift_expression
735 { $$ = new ExpressionNode( build_binary_val( OperKinds::GThan, $1, $3 ) ); }
736 | relational_expression LE shift_expression
737 { $$ = new ExpressionNode( build_binary_val( OperKinds::LEThan, $1, $3 ) ); }
738 | relational_expression GE shift_expression
739 { $$ = new ExpressionNode( build_binary_val( OperKinds::GEThan, $1, $3 ) ); }
740 ;
741
742equality_expression:
743 relational_expression
744 | equality_expression EQ relational_expression
745 { $$ = new ExpressionNode( build_binary_val( OperKinds::Eq, $1, $3 ) ); }
746 | equality_expression NE relational_expression
747 { $$ = new ExpressionNode( build_binary_val( OperKinds::Neq, $1, $3 ) ); }
748 ;
749
750AND_expression:
751 equality_expression
752 | AND_expression '&' equality_expression
753 { $$ = new ExpressionNode( build_binary_val( OperKinds::BitAnd, $1, $3 ) ); }
754 ;
755
756exclusive_OR_expression:
757 AND_expression
758 | exclusive_OR_expression '^' AND_expression
759 { $$ = new ExpressionNode( build_binary_val( OperKinds::Xor, $1, $3 ) ); }
760 ;
761
762inclusive_OR_expression:
763 exclusive_OR_expression
764 | inclusive_OR_expression '|' exclusive_OR_expression
765 { $$ = new ExpressionNode( build_binary_val( OperKinds::BitOr, $1, $3 ) ); }
766 ;
767
768logical_AND_expression:
769 inclusive_OR_expression
770 | logical_AND_expression ANDAND inclusive_OR_expression
771 { $$ = new ExpressionNode( build_and_or( $1, $3, true ) ); }
772 ;
773
774logical_OR_expression:
775 logical_AND_expression
776 | logical_OR_expression OROR logical_AND_expression
777 { $$ = new ExpressionNode( build_and_or( $1, $3, false ) ); }
778 ;
779
780conditional_expression:
781 logical_OR_expression
782 | logical_OR_expression '?' comma_expression ':' conditional_expression
783 { $$ = new ExpressionNode( build_cond( $1, $3, $5 ) ); }
784 // FIX ME: this hack computes $1 twice
785 | logical_OR_expression '?' /* empty */ ':' conditional_expression // GCC, omitted first operand
786 { $$ = new ExpressionNode( build_cond( $1, $1, $4 ) ); }
787 ;
788
789constant_expression:
790 conditional_expression
791 ;
792
793assignment_expression:
794 // CFA, assignment is separated from assignment_operator to ensure no assignment operations for tuples
795 conditional_expression
796 | unary_expression assignment_operator assignment_expression
797 { $$ = new ExpressionNode( build_binary_val( $2, $1, $3 ) ); }
798 | unary_expression '=' '{' initializer_list comma_opt '}'
799 { SemanticError( yylloc, "Initializer assignment is currently unimplemented." ); $$ = nullptr; } // FIX ME
800 ;
801
802assignment_expression_opt:
803 // empty
804 { $$ = nullptr; }
805 | assignment_expression
806 ;
807
808assignment_operator:
809 '=' { $$ = OperKinds::Assign; }
810 | ATassign { $$ = OperKinds::AtAssn; }
811 | EXPassign { $$ = OperKinds::ExpAssn; }
812 | MULTassign { $$ = OperKinds::MulAssn; }
813 | DIVassign { $$ = OperKinds::DivAssn; }
814 | MODassign { $$ = OperKinds::ModAssn; }
815 | PLUSassign { $$ = OperKinds::PlusAssn; }
816 | MINUSassign { $$ = OperKinds::MinusAssn; }
817 | LSassign { $$ = OperKinds::LSAssn; }
818 | RSassign { $$ = OperKinds::RSAssn; }
819 | ANDassign { $$ = OperKinds::AndAssn; }
820 | ERassign { $$ = OperKinds::ERAssn; }
821 | ORassign { $$ = OperKinds::OrAssn; }
822 ;
823
824tuple: // CFA, tuple
825 // CFA, one assignment_expression is factored out of comma_expression to eliminate a shift/reduce conflict with
826 // comma_expression in cfa_identifier_parameter_array and cfa_abstract_array
827// '[' ']'
828// { $$ = new ExpressionNode( build_tuple() ); }
829// '[' push assignment_expression pop ']'
830// { $$ = new ExpressionNode( build_tuple( $3 ) ); }
831 '[' push ',' tuple_expression_list pop ']'
832 { $$ = new ExpressionNode( build_tuple( (ExpressionNode *)(new ExpressionNode( nullptr ) )->set_last( $4 ) ) ); }
833 | '[' push assignment_expression ',' tuple_expression_list pop ']'
834 { $$ = new ExpressionNode( build_tuple( (ExpressionNode *)$3->set_last( $5 ) ) ); }
835 ;
836
837tuple_expression_list:
838 assignment_expression_opt
839 | tuple_expression_list ',' assignment_expression_opt
840 { $$ = (ExpressionNode *)$1->set_last( $3 ); }
841 ;
842
843comma_expression:
844 assignment_expression
845 | comma_expression ',' assignment_expression
846 { $$ = new ExpressionNode( new CommaExpr( maybeMoveBuild< Expression >( $1 ), maybeMoveBuild< Expression >( $3 ) ) ); }
847 ;
848
849comma_expression_opt:
850 // empty
851 { $$ = nullptr; }
852 | comma_expression
853 ;
854
855//*************************** STATEMENTS *******************************
856
857statement:
858 labeled_statement
859 | compound_statement
860 | expression_statement { $$ = $1; }
861 | selection_statement
862 | iteration_statement
863 | jump_statement
864 | with_statement
865 | mutex_statement
866 | waitfor_statement
867 | exception_statement
868 | enable_disable_statement
869 { SemanticError( yylloc, "enable/disable statement is currently unimplemented." ); $$ = nullptr; } // FIX ME
870 | asm_statement
871 ;
872
873labeled_statement:
874 // labels cannot be identifiers 0 or 1 or ATTR_IDENTIFIER
875 identifier_or_type_name ':' attribute_list_opt statement
876 {
877 $$ = $4->add_label( $1, $3 );
878 }
879 ;
880
881compound_statement:
882 '{' '}'
883 { $$ = new StatementNode( build_compound( (StatementNode *)0 ) ); }
884 | '{'
885 // Two scopes are necessary because the block itself has a scope, but every declaration within the block also
886 // requires its own scope.
887 push push
888 local_label_declaration_opt // GCC, local labels
889 statement_decl_list // C99, intermix declarations and statements
890 pop '}'
891 { $$ = new StatementNode( build_compound( $5 ) ); }
892 ;
893
894statement_decl_list: // C99
895 statement_decl
896 | statement_decl_list push statement_decl
897 { if ( $1 != 0 ) { $1->set_last( $3 ); $$ = $1; } }
898 ;
899
900statement_decl:
901 declaration // CFA, new & old style declarations
902 { $$ = new StatementNode( $1 ); }
903 | EXTENSION declaration // GCC
904 {
905 distExt( $2 );
906 $$ = new StatementNode( $2 );
907 }
908 | function_definition
909 { $$ = new StatementNode( $1 ); }
910 | EXTENSION function_definition // GCC
911 {
912 distExt( $2 );
913 $$ = new StatementNode( $2 );
914 }
915 | statement pop
916 ;
917
918statement_list_nodecl:
919 statement
920 | statement_list_nodecl statement
921 { if ( $1 != 0 ) { $1->set_last( $2 ); $$ = $1; } }
922 ;
923
924expression_statement:
925 comma_expression_opt ';'
926 { $$ = new StatementNode( build_expr( $1 ) ); }
927 ;
928
929selection_statement:
930 IF '(' push if_control_expression ')' statement %prec THEN
931 // explicitly deal with the shift/reduce conflict on if/else
932 { $$ = new StatementNode( build_if( $4, $6, nullptr ) ); }
933 | IF '(' push if_control_expression ')' statement ELSE statement
934 { $$ = new StatementNode( build_if( $4, $6, $8 ) ); }
935 | SWITCH '(' comma_expression ')' case_clause
936 { $$ = new StatementNode( build_switch( true, $3, $5 ) ); }
937 | SWITCH '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt '}' // CFA
938 {
939 StatementNode *sw = new StatementNode( build_switch( true, $3, $8 ) );
940 // The semantics of the declaration list is changed to include associated initialization, which is performed
941 // *before* the transfer to the appropriate case clause by hoisting the declarations into a compound
942 // statement around the switch. Statements after the initial declaration list can never be executed, and
943 // therefore, are removed from the grammar even though C allows it. The change also applies to choose
944 // statement.
945 $$ = $7 ? new StatementNode( build_compound( (StatementNode *)((new StatementNode( $7 ))->set_last( sw )) ) ) : sw;
946 }
947 | CHOOSE '(' comma_expression ')' case_clause // CFA
948 { $$ = new StatementNode( build_switch( false, $3, $5 ) ); }
949 | CHOOSE '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt '}' // CFA
950 {
951 StatementNode *sw = new StatementNode( build_switch( false, $3, $8 ) );
952 $$ = $7 ? new StatementNode( build_compound( (StatementNode *)((new StatementNode( $7 ))->set_last( sw )) ) ) : sw;
953 }
954 ;
955
956if_control_expression:
957 comma_expression pop
958 { $$ = new IfCtl( nullptr, $1 ); }
959 | c_declaration pop // no semi-colon
960 { $$ = new IfCtl( $1, nullptr ); }
961 | cfa_declaration pop // no semi-colon
962 { $$ = new IfCtl( $1, nullptr ); }
963 | declaration comma_expression // semi-colon separated
964 { $$ = new IfCtl( $1, $2 ); }
965 ;
966
967// CASE and DEFAULT clauses are only allowed in the SWITCH statement, precluding Duff's device. In addition, a case
968// clause allows a list of values and subranges.
969
970case_value: // CFA
971 constant_expression { $$ = $1; }
972 | constant_expression ELLIPSIS constant_expression // GCC, subrange
973 { $$ = new ExpressionNode( new RangeExpr( maybeMoveBuild< Expression >( $1 ), maybeMoveBuild< Expression >( $3 ) ) ); }
974 | subrange // CFA, subrange
975 ;
976
977case_value_list: // CFA
978 case_value { $$ = new StatementNode( build_case( $1 ) ); }
979 // convert case list, e.g., "case 1, 3, 5:" into "case 1: case 3: case 5"
980 | case_value_list ',' case_value { $$ = (StatementNode *)($1->set_last( new StatementNode( build_case( $3 ) ) ) ); }
981 ;
982
983case_label: // CFA
984 CASE case_value_list ':' { $$ = $2; }
985 | DEFAULT ':' { $$ = new StatementNode( build_default() ); }
986 // A semantic check is required to ensure only one default clause per switch/choose statement.
987 ;
988
989//label_list_opt:
990// // empty
991// | identifier_or_type_name ':'
992// | label_list_opt identifier_or_type_name ':'
993// ;
994
995case_label_list: // CFA
996 case_label
997 | case_label_list case_label { $$ = (StatementNode *)( $1->set_last( $2 )); }
998 ;
999
1000case_clause: // CFA
1001 case_label_list statement { $$ = $1->append_last_case( new StatementNode( build_compound( $2 ) ) ); }
1002 ;
1003
1004switch_clause_list_opt: // CFA
1005 // empty
1006 { $$ = nullptr; }
1007 | switch_clause_list
1008 ;
1009
1010switch_clause_list: // CFA
1011 case_label_list statement_list_nodecl
1012 { $$ = $1->append_last_case( new StatementNode( build_compound( $2 ) ) ); }
1013 | switch_clause_list case_label_list statement_list_nodecl
1014 { $$ = (StatementNode *)( $1->set_last( $2->append_last_case( new StatementNode( build_compound( $3 ) ) ) ) ); }
1015 ;
1016
1017iteration_statement:
1018 WHILE '(' comma_expression ')' statement
1019 { $$ = new StatementNode( build_while( $3, $5 ) ); }
1020 | DO statement WHILE '(' comma_expression ')' ';'
1021 { $$ = new StatementNode( build_while( $5, $2, true ) ); }
1022 | FOR '(' push for_control_expression ')' statement
1023 { $$ = new StatementNode( build_for( $4, $6 ) ); }
1024 ;
1025
1026for_control_expression:
1027 comma_expression_opt pop ';' comma_expression_opt ';' comma_expression_opt
1028 { $$ = new ForCtl( $1, $4, $6 ); }
1029 | declaration comma_expression_opt ';' comma_expression_opt // C99
1030 { $$ = new ForCtl( $1, $2, $4 ); }
1031 ;
1032
1033jump_statement:
1034 GOTO identifier_or_type_name ';'
1035 { $$ = new StatementNode( build_branch( $2, BranchStmt::Goto ) ); }
1036 | GOTO '*' comma_expression ';' // GCC, computed goto
1037 // The syntax for the GCC computed goto violates normal expression precedence, e.g., goto *i+3; => goto *(i+3);
1038 // whereas normal operator precedence yields goto (*i)+3;
1039 { $$ = new StatementNode( build_computedgoto( $3 ) ); }
1040 // A semantic check is required to ensure fallthru appears only in the body of a choose statement.
1041 | fall_through_name ';' // CFA
1042 { $$ = new StatementNode( build_branch( BranchStmt::FallThrough ) ); }
1043 | fall_through_name identifier_or_type_name ';' // CFA
1044 { $$ = new StatementNode( build_branch( $2, BranchStmt::FallThrough ) ); }
1045 | fall_through_name DEFAULT ';' // CFA
1046 { $$ = new StatementNode( build_branch( BranchStmt::FallThroughDefault ) ); }
1047 | CONTINUE ';'
1048 // A semantic check is required to ensure this statement appears only in the body of an iteration statement.
1049 { $$ = new StatementNode( build_branch( BranchStmt::Continue ) ); }
1050 | CONTINUE identifier_or_type_name ';' // CFA, multi-level continue
1051 // A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
1052 // the target of the transfer appears only at the start of an iteration statement.
1053 { $$ = new StatementNode( build_branch( $2, BranchStmt::Continue ) ); }
1054 | BREAK ';'
1055 // A semantic check is required to ensure this statement appears only in the body of an iteration statement.
1056 { $$ = new StatementNode( build_branch( BranchStmt::Break ) ); }
1057 | BREAK identifier_or_type_name ';' // CFA, multi-level exit
1058 // A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
1059 // the target of the transfer appears only at the start of an iteration statement.
1060 { $$ = new StatementNode( build_branch( $2, BranchStmt::Break ) ); }
1061 | RETURN comma_expression_opt ';'
1062 { $$ = new StatementNode( build_return( $2 ) ); }
1063 | RETURN '{' initializer_list comma_opt '}'
1064 { SemanticError( yylloc, "Initializer return is currently unimplemented." ); $$ = nullptr; } // FIX ME
1065 | THROW assignment_expression_opt ';' // handles rethrow
1066 { $$ = new StatementNode( build_throw( $2 ) ); }
1067 | THROWRESUME assignment_expression_opt ';' // handles reresume
1068 { $$ = new StatementNode( build_resume( $2 ) ); }
1069 | THROWRESUME assignment_expression_opt AT assignment_expression ';' // handles reresume
1070 { $$ = new StatementNode( build_resume_at( $2, $4 ) ); }
1071 ;
1072
1073fall_through_name: // CFA
1074 FALLTHRU
1075 | FALLTHROUGH
1076 ;
1077
1078with_statement:
1079 WITH '(' tuple_expression_list ')' statement
1080 {
1081 $$ = new StatementNode( build_with( $3, $5 ) );
1082 }
1083 ;
1084
1085// If MUTEX becomes a general qualifier, there are shift/reduce conflicts, so change syntax to "with mutex".
1086mutex_statement:
1087 MUTEX '(' argument_expression_list ')' statement
1088 { SemanticError( yylloc, "Mutex statement is currently unimplemented." ); $$ = nullptr; } // FIX ME
1089 ;
1090
1091when_clause:
1092 WHEN '(' comma_expression ')' { $$ = $3; }
1093 ;
1094
1095when_clause_opt:
1096 // empty
1097 { $$ = nullptr; }
1098 | when_clause
1099 ;
1100
1101waitfor:
1102 WAITFOR '(' identifier ')'
1103 {
1104 $$ = new ExpressionNode( new NameExpr( *$3 ) );
1105 delete $3;
1106 }
1107 | WAITFOR '(' identifier ',' argument_expression_list ')'
1108 {
1109 $$ = new ExpressionNode( new NameExpr( *$3 ) );
1110 $$->set_last( $5 );
1111 delete $3;
1112 }
1113 ;
1114
1115timeout:
1116 TIMEOUT '(' comma_expression ')' { $$ = $3; }
1117 ;
1118
1119waitfor_clause:
1120 when_clause_opt waitfor statement %prec THEN
1121 { $$ = build_waitfor( $2, $3, $1 ); }
1122 | when_clause_opt waitfor statement WOR waitfor_clause
1123 { $$ = build_waitfor( $2, $3, $1, $5 ); }
1124 | when_clause_opt timeout statement %prec THEN
1125 { $$ = build_waitfor_timeout( $2, $3, $1 ); }
1126 | when_clause_opt ELSE statement
1127 { $$ = build_waitfor_timeout( nullptr, $3, $1 ); }
1128 // "else" must be conditional after timeout or timeout is never triggered (i.e., it is meaningless)
1129 | when_clause_opt timeout statement WOR when_clause ELSE statement
1130 { $$ = build_waitfor_timeout( $2, $3, $1, $7, $5 ); }
1131 ;
1132
1133waitfor_statement:
1134 when_clause_opt waitfor statement %prec THEN
1135 { $$ = new StatementNode( build_waitfor( $2, $3, $1 ) ); }
1136 | when_clause_opt waitfor statement WOR waitfor_clause
1137 { $$ = new StatementNode( build_waitfor( $2, $3, $1, $5 ) ); }
1138 ;
1139
1140exception_statement:
1141 TRY compound_statement handler_clause
1142 { $$ = new StatementNode( build_try( $2, $3, 0 ) ); }
1143 | TRY compound_statement finally_clause
1144 { $$ = new StatementNode( build_try( $2, 0, $3 ) ); }
1145 | TRY compound_statement handler_clause finally_clause
1146 { $$ = new StatementNode( build_try( $2, $3, $4 ) ); }
1147 ;
1148
1149handler_clause:
1150 handler_key '(' push push exception_declaration pop handler_predicate_opt ')' compound_statement pop
1151 { $$ = new StatementNode( build_catch( $1, $5, $7, $9 ) ); }
1152 | handler_clause handler_key '(' push push exception_declaration pop handler_predicate_opt ')' compound_statement pop
1153 { $$ = (StatementNode *)$1->set_last( new StatementNode( build_catch( $2, $6, $8, $10 ) ) ); }
1154 ;
1155
1156handler_predicate_opt:
1157 //empty
1158 { $$ = nullptr; }
1159 | ';' conditional_expression { $$ = $2; }
1160 ;
1161
1162handler_key:
1163 CATCH { $$ = CatchStmt::Terminate; }
1164 | CATCHRESUME { $$ = CatchStmt::Resume; }
1165 ;
1166
1167finally_clause:
1168 FINALLY compound_statement { $$ = new StatementNode( build_finally( $2 ) ); }
1169 ;
1170
1171exception_declaration:
1172 // No SUE declaration in parameter list.
1173 type_specifier_nobody
1174 | type_specifier_nobody declarator
1175 {
1176 typedefTable.addToEnclosingScope( TypedefTable::ID );
1177 $$ = $2->addType( $1 );
1178 }
1179 | type_specifier_nobody variable_abstract_declarator
1180 { $$ = $2->addType( $1 ); }
1181 | cfa_abstract_declarator_tuple no_attr_identifier // CFA
1182 {
1183 typedefTable.addToEnclosingScope( TypedefTable::ID );
1184 $$ = $1->addName( $2 );
1185 }
1186 | cfa_abstract_declarator_tuple // CFA
1187 ;
1188
1189enable_disable_statement:
1190 enable_disable_key identifier_list compound_statement
1191 ;
1192
1193enable_disable_key:
1194 ENABLE
1195 | DISABLE
1196 ;
1197
1198asm_statement:
1199 ASM asm_volatile_opt '(' string_literal ')' ';'
1200 { $$ = new StatementNode( build_asmstmt( $2, $4, 0 ) ); }
1201 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ')' ';' // remaining GCC
1202 { $$ = new StatementNode( build_asmstmt( $2, $4, $6 ) ); }
1203 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ')' ';'
1204 { $$ = new StatementNode( build_asmstmt( $2, $4, $6, $8 ) ); }
1205 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ':' asm_clobbers_list_opt ')' ';'
1206 { $$ = new StatementNode( build_asmstmt( $2, $4, $6, $8, $10 ) ); }
1207 | ASM asm_volatile_opt GOTO '(' string_literal ':' ':' asm_operands_opt ':' asm_clobbers_list_opt ':' label_list ')' ';'
1208 { $$ = new StatementNode( build_asmstmt( $2, $5, 0, $8, $10, $12 ) ); }
1209 ;
1210
1211asm_volatile_opt: // GCC
1212 // empty
1213 { $$ = false; }
1214 | VOLATILE
1215 { $$ = true; }
1216 ;
1217
1218asm_operands_opt: // GCC
1219 // empty
1220 { $$ = nullptr; } // use default argument
1221 | asm_operands_list
1222 ;
1223
1224asm_operands_list: // GCC
1225 asm_operand
1226 | asm_operands_list ',' asm_operand
1227 { $$ = (ExpressionNode *)$1->set_last( $3 ); }
1228 ;
1229
1230asm_operand: // GCC
1231 string_literal '(' constant_expression ')'
1232 { $$ = new ExpressionNode( new AsmExpr( maybeMoveBuild< Expression >( (ExpressionNode *)nullptr ), $1, maybeMoveBuild< Expression >( $3 ) ) ); }
1233 | '[' constant_expression ']' string_literal '(' constant_expression ')'
1234 { $$ = new ExpressionNode( new AsmExpr( maybeMoveBuild< Expression >( $2 ), $4, maybeMoveBuild< Expression >( $6 ) ) ); }
1235 ;
1236
1237asm_clobbers_list_opt: // GCC
1238 // empty
1239 { $$ = nullptr; } // use default argument
1240 | string_literal
1241 { $$ = new ExpressionNode( $1 ); }
1242 | asm_clobbers_list_opt ',' string_literal
1243 // set_last returns ParseNode *
1244 { $$ = (ExpressionNode *)$1->set_last( new ExpressionNode( $3 ) ); }
1245 ;
1246
1247label_list:
1248 no_attr_identifier
1249 {
1250 $$ = new LabelNode(); $$->labels.push_back( *$1 );
1251 delete $1; // allocated by lexer
1252 }
1253 | label_list ',' no_attr_identifier
1254 {
1255 $$ = $1; $1->labels.push_back( *$3 );
1256 delete $3; // allocated by lexer
1257 }
1258 ;
1259
1260//******************************* DECLARATIONS *********************************
1261
1262declaration_list_opt: // used at beginning of switch statement
1263 pop
1264 { $$ = nullptr; }
1265 | declaration_list
1266 ;
1267
1268declaration_list:
1269 declaration
1270 | declaration_list push declaration
1271 { $$ = $1->appendList( $3 ); }
1272 ;
1273
1274KR_declaration_list_opt: // used to declare parameter types in K&R style functions
1275 // empty
1276 { $$ = nullptr; }
1277 | KR_declaration_list
1278 ;
1279
1280KR_declaration_list:
1281 push c_declaration pop ';'
1282 { $$ = $2; }
1283 | KR_declaration_list push c_declaration pop ';'
1284 { $$ = $1->appendList( $3 ); }
1285 ;
1286
1287local_label_declaration_opt: // GCC, local label
1288 // empty
1289 | local_label_declaration_list
1290 ;
1291
1292local_label_declaration_list: // GCC, local label
1293 LABEL local_label_list ';'
1294 | local_label_declaration_list LABEL local_label_list ';'
1295 ;
1296
1297local_label_list: // GCC, local label
1298 no_attr_identifier_or_type_name {}
1299 | local_label_list ',' no_attr_identifier_or_type_name {}
1300 ;
1301
1302declaration: // old & new style declarations
1303 c_declaration pop ';'
1304 | cfa_declaration pop ';' // CFA
1305 | static_assert
1306 ;
1307
1308static_assert:
1309 STATICASSERT '(' constant_expression ',' string_literal ')' ';' // C11
1310 { $$ = DeclarationNode::newStaticAssert( $3, $5 ); }
1311
1312// C declaration syntax is notoriously confusing and error prone. Cforall provides its own type, variable and function
1313// declarations. CFA declarations use the same declaration tokens as in C; however, CFA places declaration modifiers to
1314// the left of the base type, while C declarations place modifiers to the right of the base type. CFA declaration
1315// modifiers are interpreted from left to right and the entire type specification is distributed across all variables in
1316// the declaration list (as in Pascal). ANSI C and the new CFA declarations may appear together in the same program
1317// block, but cannot be mixed within a specific declaration.
1318//
1319// CFA C
1320// [10] int x; int x[10]; // array of 10 integers
1321// [10] * char y; char *y[10]; // array of 10 pointers to char
1322
1323cfa_declaration: // CFA
1324 cfa_variable_declaration
1325 | cfa_typedef_declaration
1326 | cfa_function_declaration
1327 | type_declaring_list
1328 | trait_specifier
1329 ;
1330
1331cfa_variable_declaration: // CFA
1332 cfa_variable_specifier initializer_opt
1333 {
1334 typedefTable.addToEnclosingScope( TypedefTable::ID );
1335 $$ = $1->addInitializer( $2 );
1336 }
1337 | declaration_qualifier_list cfa_variable_specifier initializer_opt
1338 // declaration_qualifier_list also includes type_qualifier_list, so a semantic check is necessary to preclude
1339 // them as a type_qualifier cannot appear in that context.
1340 {
1341 typedefTable.addToEnclosingScope( TypedefTable::ID );
1342 $$ = $2->addQualifiers( $1 )->addInitializer( $3 );;
1343 }
1344 | cfa_variable_declaration pop ',' push identifier_or_type_name initializer_opt
1345 {
1346 typedefTable.addToEnclosingScope( *$5, TypedefTable::ID );
1347 $$ = $1->appendList( $1->cloneType( $5 )->addInitializer( $6 ) );
1348 }
1349 ;
1350
1351cfa_variable_specifier: // CFA
1352 // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
1353 // storage-class
1354 cfa_abstract_declarator_no_tuple identifier_or_type_name asm_name_opt
1355 {
1356 typedefTable.setNextIdentifier( *$2 );
1357 $$ = $1->addName( $2 )->addAsmName( $3 );
1358 }
1359 | cfa_abstract_tuple identifier_or_type_name asm_name_opt
1360 {
1361 typedefTable.setNextIdentifier( *$2 );
1362 $$ = $1->addName( $2 )->addAsmName( $3 );
1363 }
1364 | type_qualifier_list cfa_abstract_tuple identifier_or_type_name asm_name_opt
1365 {
1366 typedefTable.setNextIdentifier( *$3 );
1367 $$ = $2->addQualifiers( $1 )->addName( $3 )->addAsmName( $4 );
1368 }
1369 ;
1370
1371cfa_function_declaration: // CFA
1372 cfa_function_specifier
1373 {
1374 typedefTable.addToEnclosingScope( TypedefTable::ID );
1375 $$ = $1;
1376 }
1377 | type_qualifier_list cfa_function_specifier
1378 {
1379 typedefTable.addToEnclosingScope( TypedefTable::ID );
1380 $$ = $2->addQualifiers( $1 );
1381 }
1382 | declaration_qualifier_list cfa_function_specifier
1383 {
1384 typedefTable.addToEnclosingScope( TypedefTable::ID );
1385 $$ = $2->addQualifiers( $1 );
1386 }
1387 | declaration_qualifier_list type_qualifier_list cfa_function_specifier
1388 {
1389 typedefTable.addToEnclosingScope( TypedefTable::ID );
1390 $$ = $3->addQualifiers( $1 )->addQualifiers( $2 );
1391 }
1392 | cfa_function_declaration pop ',' push identifier_or_type_name '(' push cfa_parameter_type_list_opt pop ')'
1393 {
1394 // Append the return type at the start (left-hand-side) to each identifier in the list.
1395 DeclarationNode * ret = new DeclarationNode;
1396 ret->type = maybeClone( $1->type->base );
1397 $$ = $1->appendList( DeclarationNode::newFunction( $5, ret, $8, nullptr ) );
1398 }
1399 ;
1400
1401cfa_function_specifier: // CFA
1402// '[' ']' identifier_or_type_name '(' push cfa_parameter_type_list_opt pop ')' // S/R conflict
1403// {
1404// $$ = DeclarationNode::newFunction( $3, DeclarationNode::newTuple( 0 ), $6, 0, true );
1405// }
1406// '[' ']' identifier '(' push cfa_parameter_type_list_opt pop ')'
1407// {
1408// typedefTable.setNextIdentifier( *$5 );
1409// $$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, 0, true );
1410// }
1411// | '[' ']' TYPEDEFname '(' push cfa_parameter_type_list_opt pop ')'
1412// {
1413// typedefTable.setNextIdentifier( *$5 );
1414// $$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, 0, true );
1415// }
1416// | '[' ']' typegen_name
1417 // identifier_or_type_name must be broken apart because of the sequence:
1418 //
1419 // '[' ']' identifier_or_type_name '(' cfa_parameter_type_list_opt ')'
1420 // '[' ']' type_specifier
1421 //
1422 // type_specifier can resolve to just TYPEDEFname (e.g., typedef int T; int f( T );). Therefore this must be
1423 // flattened to allow lookahead to the '(' without having to reduce identifier_or_type_name.
1424 cfa_abstract_tuple identifier_or_type_name '(' push cfa_parameter_type_list_opt pop ')'
1425 // To obtain LR(1 ), this rule must be factored out from function return type (see cfa_abstract_declarator).
1426 {
1427 $$ = DeclarationNode::newFunction( $2, $1, $5, 0 );
1428 }
1429 | cfa_function_return identifier_or_type_name '(' push cfa_parameter_type_list_opt pop ')'
1430 {
1431 $$ = DeclarationNode::newFunction( $2, $1, $5, 0 );
1432 }
1433 ;
1434
1435cfa_function_return: // CFA
1436 '[' push cfa_parameter_list pop ']'
1437 { $$ = DeclarationNode::newTuple( $3 ); }
1438 | '[' push cfa_parameter_list pop ',' push cfa_abstract_parameter_list pop ']'
1439 // To obtain LR(1 ), the last cfa_abstract_parameter_list is added into this flattened rule to lookahead to the
1440 // ']'.
1441 { $$ = DeclarationNode::newTuple( $3->appendList( $7 ) ); }
1442 ;
1443
1444cfa_typedef_declaration: // CFA
1445 TYPEDEF cfa_variable_specifier
1446 {
1447 typedefTable.addToEnclosingScope( TypedefTable::TD );
1448 $$ = $2->addTypedef();
1449 }
1450 | TYPEDEF cfa_function_specifier
1451 {
1452 typedefTable.addToEnclosingScope( TypedefTable::TD );
1453 $$ = $2->addTypedef();
1454 }
1455 | cfa_typedef_declaration pop ',' push no_attr_identifier
1456 {
1457 typedefTable.addToEnclosingScope( *$5, TypedefTable::TD );
1458 $$ = $1->appendList( $1->cloneType( $5 ) );
1459 }
1460 ;
1461
1462// Traditionally typedef is part of storage-class specifier for syntactic convenience only. Here, it is factored out as
1463// a separate form of declaration, which syntactically precludes storage-class specifiers and initialization.
1464
1465typedef_declaration:
1466 TYPEDEF type_specifier declarator
1467 {
1468 typedefTable.addToEnclosingScope( TypedefTable::TD );
1469 $$ = $3->addType( $2 )->addTypedef();
1470 }
1471 | typedef_declaration pop ',' push declarator
1472 {
1473 typedefTable.addToEnclosingScope( TypedefTable::TD );
1474 $$ = $1->appendList( $1->cloneBaseType( $5 )->addTypedef() );
1475 }
1476 | type_qualifier_list TYPEDEF type_specifier declarator // remaining OBSOLESCENT (see 2 )
1477 {
1478 typedefTable.addToEnclosingScope( TypedefTable::TD );
1479 $$ = $4->addType( $3 )->addQualifiers( $1 )->addTypedef();
1480 }
1481 | type_specifier TYPEDEF declarator
1482 {
1483 typedefTable.addToEnclosingScope( TypedefTable::TD );
1484 $$ = $3->addType( $1 )->addTypedef();
1485 }
1486 | type_specifier TYPEDEF type_qualifier_list declarator
1487 {
1488 typedefTable.addToEnclosingScope( TypedefTable::TD );
1489 $$ = $4->addQualifiers( $1 )->addTypedef()->addType( $1 );
1490 }
1491 ;
1492
1493typedef_expression:
1494 // GCC, naming expression type: typedef name = exp; gives a name to the type of an expression
1495 TYPEDEF no_attr_identifier '=' assignment_expression
1496 {
1497 typedefTable.addToEnclosingScope( *$2, TypedefTable::TD );
1498 $$ = DeclarationNode::newName( 0 ); // unimplemented
1499 }
1500 | typedef_expression pop ',' push no_attr_identifier '=' assignment_expression
1501 {
1502 typedefTable.addToEnclosingScope( *$5, TypedefTable::TD );
1503 $$ = DeclarationNode::newName( 0 ); // unimplemented
1504 }
1505 ;
1506
1507//c_declaration:
1508// declaring_list pop ';'
1509// | typedef_declaration pop ';'
1510// | typedef_expression pop ';' // GCC, naming expression type
1511// | sue_declaration_specifier pop ';'
1512// ;
1513//
1514//declaring_list:
1515// // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
1516// // storage-class
1517// declarator asm_name_opt initializer_opt
1518// {
1519// typedefTable.addToEnclosingScope( TypedefTable::ID );
1520// $$ = ( $2->addType( $1 ))->addAsmName( $3 )->addInitializer( $4 );
1521// }
1522// | declaring_list ',' attribute_list_opt declarator asm_name_opt initializer_opt
1523// {
1524// typedefTable.addToEnclosingScope( TypedefTable::ID );
1525// $$ = $1->appendList( $1->cloneBaseType( $4->addAsmName( $5 )->addInitializer( $6 ) ) );
1526// }
1527// ;
1528
1529c_declaration:
1530 declaration_specifier declaring_list
1531 {
1532 $$ = distAttr( $1, $2 );
1533 }
1534 | typedef_declaration
1535 | typedef_expression // GCC, naming expression type
1536 | sue_declaration_specifier
1537 ;
1538
1539declaring_list:
1540 // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
1541 // storage-class
1542 declarator asm_name_opt initializer_opt
1543 {
1544 typedefTable.addToEnclosingScope( TypedefTable::ID );
1545 $$ = $1->addAsmName( $2 )->addInitializer( $3 );
1546 }
1547 | declaring_list ',' attribute_list_opt declarator asm_name_opt initializer_opt
1548 {
1549 typedefTable.addToEnclosingScope( TypedefTable::ID );
1550 $$ = $1->appendList( $4->addQualifiers( $3 )->addAsmName( $5 )->addInitializer( $6 ) );
1551 }
1552 ;
1553
1554declaration_specifier: // type specifier + storage class
1555 basic_declaration_specifier
1556 | sue_declaration_specifier
1557 | type_declaration_specifier
1558 ;
1559
1560declaration_specifier_nobody: // type specifier + storage class - {...}
1561 // Preclude SUE declarations in restricted scopes:
1562 //
1563 // int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... }
1564 //
1565 // because it is impossible to call f due to name equivalence.
1566 basic_declaration_specifier
1567 | sue_declaration_specifier_nobody
1568 | type_declaration_specifier
1569 ;
1570
1571type_specifier: // type specifier
1572 basic_type_specifier
1573 | sue_type_specifier
1574 | type_type_specifier
1575 ;
1576
1577type_specifier_nobody: // type specifier - {...}
1578 // Preclude SUE declarations in restricted scopes:
1579 //
1580 // int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... }
1581 //
1582 // because it is impossible to call f due to name equivalence.
1583 basic_type_specifier
1584 | sue_type_specifier_nobody
1585 | type_type_specifier
1586 ;
1587
1588type_qualifier_list_opt: // GCC, used in asm_statement
1589 // empty
1590 { $$ = nullptr; }
1591 | type_qualifier_list
1592 ;
1593
1594type_qualifier_list:
1595 // A semantic check is necessary to ensure a type qualifier is appropriate for the kind of declaration.
1596 //
1597 // ISO/IEC 9899:1999 Section 6.7.3(4 ) : If the same qualifier appears more than once in the same
1598 // specifier-qualifier-list, either directly or via one or more typedefs, the behavior is the same as if it
1599 // appeared only once.
1600 type_qualifier
1601 | type_qualifier_list type_qualifier
1602 { $$ = $1->addQualifiers( $2 ); }
1603 ;
1604
1605type_qualifier:
1606 type_qualifier_name
1607 | attribute
1608 ;
1609
1610type_qualifier_name:
1611 CONST
1612 { $$ = DeclarationNode::newTypeQualifier( Type::Const ); }
1613 | RESTRICT
1614 { $$ = DeclarationNode::newTypeQualifier( Type::Restrict ); }
1615 | VOLATILE
1616 { $$ = DeclarationNode::newTypeQualifier( Type::Volatile ); }
1617 | ATOMIC
1618 { $$ = DeclarationNode::newTypeQualifier( Type::Atomic ); }
1619 | forall
1620 ;
1621
1622forall:
1623 FORALL '('
1624 {
1625 typedefTable.enterScope();
1626 }
1627 type_parameter_list ')' // CFA
1628 {
1629 typedefTable.leaveScope();
1630 $$ = DeclarationNode::newForall( $4 );
1631 }
1632 ;
1633
1634declaration_qualifier_list:
1635 storage_class_list
1636 | type_qualifier_list storage_class_list // remaining OBSOLESCENT (see 2 )
1637 { $$ = $1->addQualifiers( $2 ); }
1638 | declaration_qualifier_list type_qualifier_list storage_class_list
1639 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1640 ;
1641
1642storage_class_list:
1643 // A semantic check is necessary to ensure a storage class is appropriate for the kind of declaration and that
1644 // only one of each is specified, except for inline, which can appear with the others.
1645 //
1646 // ISO/IEC 9899:1999 Section 6.7.1(2) : At most, one storage-class specifier may be given in the declaration
1647 // specifiers in a declaration.
1648 storage_class
1649 | storage_class_list storage_class
1650 { $$ = $1->addQualifiers( $2 ); }
1651 ;
1652
1653storage_class:
1654 EXTERN
1655 { $$ = DeclarationNode::newStorageClass( Type::Extern ); }
1656 | STATIC
1657 { $$ = DeclarationNode::newStorageClass( Type::Static ); }
1658 | AUTO
1659 { $$ = DeclarationNode::newStorageClass( Type::Auto ); }
1660 | REGISTER
1661 { $$ = DeclarationNode::newStorageClass( Type::Register ); }
1662 | THREADLOCAL // C11
1663 { $$ = DeclarationNode::newStorageClass( Type::Threadlocal ); }
1664 // Put function specifiers here to simplify parsing rules, but separate them semantically.
1665 | INLINE // C99
1666 { $$ = DeclarationNode::newFuncSpecifier( Type::Inline ); }
1667 | FORTRAN // C99
1668 { $$ = DeclarationNode::newFuncSpecifier( Type::Fortran ); }
1669 | NORETURN // C11
1670 { $$ = DeclarationNode::newFuncSpecifier( Type::Noreturn ); }
1671 ;
1672
1673basic_type_name:
1674 VOID
1675 { $$ = DeclarationNode::newBasicType( DeclarationNode::Void ); }
1676 | BOOL // C99
1677 { $$ = DeclarationNode::newBasicType( DeclarationNode::Bool ); }
1678 | CHAR
1679 { $$ = DeclarationNode::newBasicType( DeclarationNode::Char ); }
1680 | INT
1681 { $$ = DeclarationNode::newBasicType( DeclarationNode::Int ); }
1682 | INT128
1683 { $$ = DeclarationNode::newBasicType( DeclarationNode::Int128 ); }
1684 | FLOAT
1685 { $$ = DeclarationNode::newBasicType( DeclarationNode::Float ); }
1686 | FLOAT80
1687 { $$ = DeclarationNode::newBasicType( DeclarationNode::Float80 ); }
1688 | FLOAT128
1689 { $$ = DeclarationNode::newBasicType( DeclarationNode::Float128 ); }
1690 | DOUBLE
1691 { $$ = DeclarationNode::newBasicType( DeclarationNode::Double ); }
1692 | COMPLEX // C99
1693 { $$ = DeclarationNode::newComplexType( DeclarationNode::Complex ); }
1694 | IMAGINARY // C99
1695 { $$ = DeclarationNode::newComplexType( DeclarationNode::Imaginary ); }
1696 | SIGNED
1697 { $$ = DeclarationNode::newSignedNess( DeclarationNode::Signed ); }
1698 | UNSIGNED
1699 { $$ = DeclarationNode::newSignedNess( DeclarationNode::Unsigned ); }
1700 | SHORT
1701 { $$ = DeclarationNode::newLength( DeclarationNode::Short ); }
1702 | LONG
1703 { $$ = DeclarationNode::newLength( DeclarationNode::Long ); }
1704 | ZERO_T
1705 { $$ = DeclarationNode::newBuiltinType( DeclarationNode::Zero ); }
1706 | ONE_T
1707 { $$ = DeclarationNode::newBuiltinType( DeclarationNode::One ); }
1708 | VALIST // GCC, __builtin_va_list
1709 { $$ = DeclarationNode::newBuiltinType( DeclarationNode::Valist ); }
1710 ;
1711
1712basic_declaration_specifier:
1713 // A semantic check is necessary for conflicting storage classes.
1714 basic_type_specifier
1715 | declaration_qualifier_list basic_type_specifier
1716 { $$ = $2->addQualifiers( $1 ); }
1717 | basic_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1718 { $$ = $1->addQualifiers( $2 ); }
1719 | basic_declaration_specifier storage_class type_qualifier_list
1720 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1721 | basic_declaration_specifier storage_class basic_type_specifier
1722 { $$ = $3->addQualifiers( $2 )->addType( $1 ); }
1723 ;
1724
1725basic_type_specifier:
1726 direct_type
1727 | type_qualifier_list_opt indirect_type type_qualifier_list_opt
1728 { $$ = $2->addQualifiers( $1 )->addQualifiers( $3 ); }
1729 ;
1730
1731direct_type:
1732 // A semantic check is necessary for conflicting type qualifiers.
1733 basic_type_name
1734 | type_qualifier_list basic_type_name
1735 { $$ = $2->addQualifiers( $1 ); }
1736 | direct_type type_qualifier
1737 { $$ = $1->addQualifiers( $2 ); }
1738 | direct_type basic_type_name
1739 { $$ = $1->addType( $2 ); }
1740 ;
1741
1742indirect_type:
1743 TYPEOF '(' type ')' // GCC: typeof(x) y;
1744 { $$ = $3; }
1745 | TYPEOF '(' comma_expression ')' // GCC: typeof(a+b) y;
1746 { $$ = DeclarationNode::newTypeof( $3 ); }
1747 | ATTR_TYPEGENname '(' type ')' // CFA: e.g., @type(x) y;
1748 { $$ = DeclarationNode::newAttr( $1, $3 ); }
1749 | ATTR_TYPEGENname '(' comma_expression ')' // CFA: e.g., @type(a+b) y;
1750 { $$ = DeclarationNode::newAttr( $1, $3 ); }
1751 ;
1752
1753sue_declaration_specifier: // struct, union, enum + storage class + type specifier
1754 sue_type_specifier
1755 | declaration_qualifier_list sue_type_specifier
1756 { $$ = $2->addQualifiers( $1 ); }
1757 | sue_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1758 { $$ = $1->addQualifiers( $2 ); }
1759 | sue_declaration_specifier storage_class type_qualifier_list
1760 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1761 ;
1762
1763sue_type_specifier: // struct, union, enum + type specifier
1764 elaborated_type
1765 | type_qualifier_list
1766 { if ( $1->type != nullptr && $1->type->forall ) forall = true; } // remember generic type
1767 elaborated_type
1768 { $$ = $3->addQualifiers( $1 ); }
1769 | sue_type_specifier type_qualifier
1770 { $$ = $1->addQualifiers( $2 ); }
1771 ;
1772
1773sue_declaration_specifier_nobody: // struct, union, enum - {...} + storage class + type specifier
1774 sue_type_specifier_nobody
1775 | declaration_qualifier_list sue_type_specifier_nobody
1776 { $$ = $2->addQualifiers( $1 ); }
1777 | sue_declaration_specifier_nobody storage_class // remaining OBSOLESCENT (see 2)
1778 { $$ = $1->addQualifiers( $2 ); }
1779 | sue_declaration_specifier_nobody storage_class type_qualifier_list
1780 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1781 ;
1782
1783sue_type_specifier_nobody: // struct, union, enum - {...} + type specifier
1784 elaborated_type_nobody
1785 | type_qualifier_list elaborated_type_nobody
1786 { $$ = $2->addQualifiers( $1 ); }
1787 | sue_type_specifier_nobody type_qualifier
1788 { $$ = $1->addQualifiers( $2 ); }
1789 ;
1790
1791type_declaration_specifier:
1792 type_type_specifier
1793 | declaration_qualifier_list type_type_specifier
1794 { $$ = $2->addQualifiers( $1 ); }
1795 | type_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1796 { $$ = $1->addQualifiers( $2 ); }
1797 | type_declaration_specifier storage_class type_qualifier_list
1798 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1799 ;
1800
1801type_type_specifier: // typedef types
1802 type_name
1803 | type_qualifier_list type_name
1804 { $$ = $2->addQualifiers( $1 ); }
1805 | type_type_specifier type_qualifier
1806 { $$ = $1->addQualifiers( $2 ); }
1807 ;
1808
1809type_name:
1810 TYPEDEFname
1811 { $$ = DeclarationNode::newFromTypedef( $1 ); }
1812 | '.' TYPEDEFname
1813 { $$ = DeclarationNode::newFromTypedef( $2 ); } // FIX ME
1814 | type_name '.' TYPEDEFname
1815 { $$ = DeclarationNode::newFromTypedef( $3 ); } // FIX ME
1816 | typegen_name
1817 | '.' typegen_name
1818 { $$ = $2; } // FIX ME
1819 | type_name '.' typegen_name
1820 { $$ = $3; } // FIX ME
1821 ;
1822
1823typegen_name: // CFA
1824 TYPEGENname
1825 { $$ = DeclarationNode::newFromTypeGen( $1, nullptr ); }
1826 | TYPEGENname '(' ')'
1827 { $$ = DeclarationNode::newFromTypeGen( $1, nullptr ); }
1828 | TYPEGENname '(' type_list ')'
1829 { $$ = DeclarationNode::newFromTypeGen( $1, $3 ); }
1830 ;
1831
1832elaborated_type: // struct, union, enum
1833 aggregate_type
1834 | enum_type
1835 ;
1836
1837elaborated_type_nobody: // struct, union, enum - {...}
1838 aggregate_type_nobody
1839 | enum_type_nobody
1840 ;
1841
1842aggregate_type: // struct, union
1843 aggregate_key attribute_list_opt '{' field_declaration_list '}'
1844 { $$ = DeclarationNode::newAggregate( $1, new string( DeclarationNode::anonymous.newName() ), nullptr, $4, true )->addQualifiers( $2 ); }
1845 | aggregate_key attribute_list_opt no_attr_identifier_or_type_name
1846 {
1847 typedefTable.makeTypedef( *$3 ); // create typedef
1848 if ( forall ) typedefTable.changeKind( *$3, TypedefTable::TG ); // possibly update
1849 forall = false; // reset
1850 }
1851 '{' field_declaration_list '}'
1852 { $$ = DeclarationNode::newAggregate( $1, $3, nullptr, $6, true )->addQualifiers( $2 ); }
1853 | aggregate_key attribute_list_opt '(' type_list ')' '{' field_declaration_list '}' // CFA
1854 { $$ = DeclarationNode::newAggregate( $1, new string( DeclarationNode::anonymous.newName() ), $4, $7, false )->addQualifiers( $2 ); }
1855 | aggregate_type_nobody
1856 ;
1857
1858aggregate_type_nobody: // struct, union - {...}
1859 aggregate_key attribute_list_opt no_attr_identifier
1860 {
1861 typedefTable.makeTypedef( *$3 );
1862 $$ = DeclarationNode::newAggregate( $1, $3, nullptr, nullptr, false )->addQualifiers( $2 );
1863 }
1864 | aggregate_key attribute_list_opt TYPEDEFname
1865 {
1866 typedefTable.makeTypedef( *$3 );
1867 $$ = DeclarationNode::newAggregate( $1, $3, nullptr, nullptr, false )->addQualifiers( $2 );
1868 }
1869 | aggregate_key attribute_list_opt typegen_name // CFA
1870 {
1871 // Create new generic declaration with same name as previous forward declaration, where the IDENTIFIER is
1872 // switched to a TYPEGENname. Link any generic arguments from typegen_name to new generic declaration and
1873 // delete newFromTypeGen.
1874 $$ = DeclarationNode::newAggregate( $1, $3->type->symbolic.name, $3->type->symbolic.actuals, nullptr, false )->addQualifiers( $2 );
1875 $3->type->symbolic.name = nullptr;
1876 $3->type->symbolic.actuals = nullptr;
1877 delete $3;
1878 }
1879 ;
1880
1881aggregate_key:
1882 STRUCT
1883 { $$ = DeclarationNode::Struct; }
1884 | UNION
1885 { $$ = DeclarationNode::Union; }
1886 | EXCEPTION
1887 { $$ = DeclarationNode::Exception; }
1888 | COROUTINE
1889 { $$ = DeclarationNode::Coroutine; }
1890 | MONITOR
1891 { $$ = DeclarationNode::Monitor; }
1892 | THREAD
1893 { $$ = DeclarationNode::Thread; }
1894 ;
1895
1896field_declaration_list:
1897 // empty
1898 { $$ = nullptr; }
1899 | field_declaration_list field_declaration
1900 { $$ = $1 ? $1->appendList( $2 ) : $2; }
1901 ;
1902
1903field_declaration:
1904 cfa_field_declaring_list ';' // CFA, new style field declaration
1905 | EXTENSION cfa_field_declaring_list ';' // GCC
1906 {
1907 distExt( $2 ); // mark all fields in list
1908 $$ = $2;
1909 }
1910 | type_specifier field_declaring_list ';'
1911 {
1912 $$ = distAttr( $1, $2 ); }
1913 | EXTENSION type_specifier field_declaring_list ';' // GCC
1914 {
1915 distExt( $3 ); // mark all fields in list
1916 $$ = distAttr( $2, $3 );
1917 }
1918 | static_assert
1919 ;
1920
1921cfa_field_declaring_list: // CFA, new style field declaration
1922 cfa_abstract_declarator_tuple // CFA, no field name
1923 | cfa_abstract_declarator_tuple no_attr_identifier_or_type_name
1924 { $$ = $1->addName( $2 ); }
1925 | cfa_field_declaring_list ',' no_attr_identifier_or_type_name
1926 { $$ = $1->appendList( $1->cloneType( $3 ) ); }
1927 | cfa_field_declaring_list ',' // CFA, no field name
1928 { $$ = $1->appendList( $1->cloneType( 0 ) ); }
1929 ;
1930
1931field_declaring_list:
1932 field_declarator
1933 | field_declaring_list ',' attribute_list_opt field_declarator
1934 { $$ = $1->appendList( $4->addQualifiers( $3 ) ); }
1935 ;
1936
1937field_declarator:
1938 // empty
1939 { $$ = DeclarationNode::newName( 0 ); /* XXX */ } // CFA, no field name
1940 // '@'
1941 // { $$ = DeclarationNode::newName( new string( DeclarationNode::anonymous.newName() ) ); } // CFA, no field name
1942 | bit_subrange_size // no field name
1943 { $$ = DeclarationNode::newBitfield( $1 ); }
1944 | variable_declarator bit_subrange_size_opt
1945 // A semantic check is required to ensure bit_subrange only appears on base type int.
1946 { $$ = $1->addBitfield( $2 ); }
1947 | variable_type_redeclarator bit_subrange_size_opt
1948 // A semantic check is required to ensure bit_subrange only appears on base type int.
1949 { $$ = $1->addBitfield( $2 ); }
1950 | variable_abstract_declarator // CFA, no field name
1951 ;
1952
1953bit_subrange_size_opt:
1954 // empty
1955 { $$ = nullptr; }
1956 | bit_subrange_size
1957 { $$ = $1; }
1958 ;
1959
1960bit_subrange_size:
1961 ':' constant_expression
1962 { $$ = $2; }
1963 ;
1964
1965enum_type: // enum
1966 ENUM attribute_list_opt '{' enumerator_list comma_opt '}'
1967 { $$ = DeclarationNode::newEnum( new string( DeclarationNode::anonymous.newName() ), $4, true )->addQualifiers( $2 ); }
1968 | ENUM attribute_list_opt no_attr_identifier_or_type_name
1969 { typedefTable.makeTypedef( *$3 ); }
1970 '{' enumerator_list comma_opt '}'
1971 { $$ = DeclarationNode::newEnum( $3, $6, true )->addQualifiers( $2 ); }
1972 | enum_type_nobody
1973 ;
1974
1975enum_type_nobody: // enum - {...}
1976 ENUM attribute_list_opt no_attr_identifier_or_type_name
1977 {
1978 typedefTable.makeTypedef( *$3 );
1979 $$ = DeclarationNode::newEnum( $3, 0, false )->addQualifiers( $2 );
1980 }
1981 ;
1982
1983enumerator_list:
1984 no_attr_identifier_or_type_name enumerator_value_opt
1985 { $$ = DeclarationNode::newEnumConstant( $1, $2 ); }
1986 | enumerator_list ',' no_attr_identifier_or_type_name enumerator_value_opt
1987 { $$ = $1->appendList( DeclarationNode::newEnumConstant( $3, $4 ) ); }
1988 ;
1989
1990enumerator_value_opt:
1991 // empty
1992 { $$ = nullptr; }
1993 | '=' constant_expression
1994 { $$ = $2; }
1995 ;
1996
1997cfa_parameter_type_list_opt: // CFA, abstract + real
1998 // empty
1999 { $$ = DeclarationNode::newBasicType( DeclarationNode::Void ); }
2000 | ELLIPSIS
2001 { $$ = nullptr; }
2002 | cfa_abstract_parameter_list
2003 | cfa_parameter_list
2004 | cfa_parameter_list pop ',' push cfa_abstract_parameter_list
2005 { $$ = $1->appendList( $5 ); }
2006 | cfa_abstract_parameter_list pop ',' push ELLIPSIS
2007 { $$ = $1->addVarArgs(); }
2008 | cfa_parameter_list pop ',' push ELLIPSIS
2009 { $$ = $1->addVarArgs(); }
2010 ;
2011
2012cfa_parameter_list: // CFA
2013 // To obtain LR(1) between cfa_parameter_list and cfa_abstract_tuple, the last cfa_abstract_parameter_list is
2014 // factored out from cfa_parameter_list, flattening the rules to get lookahead to the ']'.
2015 cfa_parameter_declaration
2016 | cfa_abstract_parameter_list pop ',' push cfa_parameter_declaration
2017 { $$ = $1->appendList( $5 ); }
2018 | cfa_parameter_list pop ',' push cfa_parameter_declaration
2019 { $$ = $1->appendList( $5 ); }
2020 | cfa_parameter_list pop ',' push cfa_abstract_parameter_list pop ',' push cfa_parameter_declaration
2021 { $$ = $1->appendList( $5 )->appendList( $9 ); }
2022 ;
2023
2024cfa_abstract_parameter_list: // CFA, new & old style abstract
2025 cfa_abstract_parameter_declaration
2026 | cfa_abstract_parameter_list pop ',' push cfa_abstract_parameter_declaration
2027 { $$ = $1->appendList( $5 ); }
2028 ;
2029
2030parameter_type_list_opt:
2031 // empty
2032 { $$ = nullptr; }
2033 | ELLIPSIS
2034 { $$ = nullptr; }
2035 | parameter_list
2036 | parameter_list pop ',' push ELLIPSIS
2037 { $$ = $1->addVarArgs(); }
2038 ;
2039
2040parameter_list: // abstract + real
2041 abstract_parameter_declaration
2042 | parameter_declaration
2043 | parameter_list pop ',' push abstract_parameter_declaration
2044 { $$ = $1->appendList( $5 ); }
2045 | parameter_list pop ',' push parameter_declaration
2046 { $$ = $1->appendList( $5 ); }
2047 ;
2048
2049// Provides optional identifier names (abstract_declarator/variable_declarator), no initialization, different semantics
2050// for typedef name by using type_parameter_redeclarator instead of typedef_redeclarator, and function prototypes.
2051
2052cfa_parameter_declaration: // CFA, new & old style parameter declaration
2053 parameter_declaration
2054 | cfa_identifier_parameter_declarator_no_tuple identifier_or_type_name default_initialize_opt
2055 { $$ = $1->addName( $2 ); }
2056 | cfa_abstract_tuple identifier_or_type_name default_initialize_opt
2057 // To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator).
2058 { $$ = $1->addName( $2 ); }
2059 | type_qualifier_list cfa_abstract_tuple identifier_or_type_name default_initialize_opt
2060 { $$ = $2->addName( $3 )->addQualifiers( $1 ); }
2061 | cfa_function_specifier
2062 ;
2063
2064cfa_abstract_parameter_declaration: // CFA, new & old style parameter declaration
2065 abstract_parameter_declaration
2066 | cfa_identifier_parameter_declarator_no_tuple
2067 | cfa_abstract_tuple
2068 // To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator).
2069 | type_qualifier_list cfa_abstract_tuple
2070 { $$ = $2->addQualifiers( $1 ); }
2071 | cfa_abstract_function
2072 ;
2073
2074parameter_declaration:
2075 // No SUE declaration in parameter list.
2076 declaration_specifier_nobody identifier_parameter_declarator default_initialize_opt
2077 {
2078 typedefTable.addToEnclosingScope( TypedefTable::ID );
2079 $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr );
2080 }
2081 | declaration_specifier_nobody type_parameter_redeclarator default_initialize_opt
2082 {
2083 typedefTable.addToEnclosingScope( TypedefTable::ID );
2084 $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr );
2085 }
2086 ;
2087
2088abstract_parameter_declaration:
2089 declaration_specifier_nobody default_initialize_opt
2090 { $$ = $1->addInitializer( $2 ? new InitializerNode( $2 ) : nullptr ); }
2091 | declaration_specifier_nobody abstract_parameter_declarator default_initialize_opt
2092 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
2093 ;
2094
2095// ISO/IEC 9899:1999 Section 6.9.1(6) : "An identifier declared as a typedef name shall not be redeclared as a
2096// parameter." Because the scope of the K&R-style parameter-list sees the typedef first, the following is based only on
2097// identifiers. The ANSI-style parameter-list can redefine a typedef name.
2098
2099identifier_list: // K&R-style parameter list => no types
2100 no_attr_identifier
2101 { $$ = DeclarationNode::newName( $1 ); }
2102 | identifier_list ',' no_attr_identifier
2103 { $$ = $1->appendList( DeclarationNode::newName( $3 ) ); }
2104 ;
2105
2106identifier_or_type_name:
2107 identifier
2108 | TYPEDEFname
2109 | TYPEGENname
2110 ;
2111
2112no_attr_identifier_or_type_name:
2113 no_attr_identifier
2114 | TYPEDEFname
2115 | TYPEGENname
2116 ;
2117
2118type_no_function: // sizeof, alignof, cast (constructor)
2119 cfa_abstract_declarator_tuple // CFA
2120 | type_specifier
2121 | type_specifier abstract_declarator
2122 { $$ = $2->addType( $1 ); }
2123 ;
2124
2125type: // typeof, assertion
2126 type_no_function
2127 | cfa_abstract_function // CFA
2128 ;
2129
2130initializer_opt:
2131 // empty
2132 { $$ = nullptr; }
2133 | '=' initializer
2134 { $$ = $2; }
2135 | '=' VOID
2136 { $$ = nullptr; }
2137 | ATassign initializer
2138 { $$ = $2->set_maybeConstructed( false ); }
2139 ;
2140
2141initializer:
2142 assignment_expression { $$ = new InitializerNode( $1 ); }
2143 | '{' initializer_list comma_opt '}' { $$ = new InitializerNode( $2, true ); }
2144 ;
2145
2146initializer_list:
2147 // empty
2148 { $$ = nullptr; }
2149 | initializer
2150 | designation initializer { $$ = $2->set_designators( $1 ); }
2151 | initializer_list ',' initializer { $$ = (InitializerNode *)( $1->set_last( $3 ) ); }
2152 | initializer_list ',' designation initializer
2153 { $$ = (InitializerNode *)( $1->set_last( $4->set_designators( $3 ) ) ); }
2154 ;
2155
2156// There is an unreconcileable parsing problem between C99 and CFA with respect to designators. The problem is use of
2157// '=' to separator the designator from the initializer value, as in:
2158//
2159// int x[10] = { [1] = 3 };
2160//
2161// The string "[1] = 3" can be parsed as a designator assignment or a tuple assignment. To disambiguate this case, CFA
2162// changes the syntax from "=" to ":" as the separator between the designator and initializer. GCC does uses ":" for
2163// field selection. The optional use of the "=" in GCC, or in this case ":", cannot be supported either due to
2164// shift/reduce conflicts
2165
2166designation:
2167 designator_list ':' // C99, CFA uses ":" instead of "="
2168 | no_attr_identifier ':' // GCC, field name
2169 { $$ = new ExpressionNode( build_varref( $1 ) ); }
2170 ;
2171
2172designator_list: // C99
2173 designator
2174 | designator_list designator
2175 { $$ = (ExpressionNode *)( $1->set_last( $2 ) ); }
2176 //| designator_list designator { $$ = new ExpressionNode( $1, $2 ); }
2177 ;
2178
2179designator:
2180 '.' no_attr_identifier // C99, field name
2181 { $$ = new ExpressionNode( build_varref( $2 ) ); }
2182 | '[' push assignment_expression pop ']' // C99, single array element
2183 // assignment_expression used instead of constant_expression because of shift/reduce conflicts with tuple.
2184 { $$ = $3; }
2185 | '[' push subrange pop ']' // CFA, multiple array elements
2186 { $$ = $3; }
2187 | '[' push constant_expression ELLIPSIS constant_expression pop ']' // GCC, multiple array elements
2188 { $$ = new ExpressionNode( new RangeExpr( maybeMoveBuild< Expression >( $3 ), maybeMoveBuild< Expression >( $5 ) ) ); }
2189 | '.' '[' push field_list pop ']' // CFA, tuple field selector
2190 { $$ = $4; }
2191 ;
2192
2193// The CFA type system is based on parametric polymorphism, the ability to declare functions with type parameters,
2194// rather than an object-oriented type system. This required four groups of extensions:
2195//
2196// Overloading: function, data, and operator identifiers may be overloaded.
2197//
2198// Type declarations: "type" is used to generate new types for declaring objects. Similarly, "dtype" is used for object
2199// and incomplete types, and "ftype" is used for function types. Type declarations with initializers provide
2200// definitions of new types. Type declarations with storage class "extern" provide opaque types.
2201//
2202// Polymorphic functions: A forall clause declares a type parameter. The corresponding argument is inferred at the call
2203// site. A polymorphic function is not a template; it is a function, with an address and a type.
2204//
2205// Specifications and Assertions: Specifications are collections of declarations parameterized by one or more
2206// types. They serve many of the purposes of abstract classes, and specification hierarchies resemble subclass
2207// hierarchies. Unlike classes, they can define relationships between types. Assertions declare that a type or
2208// types provide the operations declared by a specification. Assertions are normally used to declare requirements
2209// on type arguments of polymorphic functions.
2210
2211type_parameter_list: // CFA
2212 type_parameter
2213 { $$ = $1; }
2214 | type_parameter_list ',' type_parameter
2215 { $$ = $1->appendList( $3 ); }
2216 ;
2217
2218type_initializer_opt: // CFA
2219 // empty
2220 { $$ = nullptr; }
2221 | '=' type
2222 { $$ = $2; }
2223 ;
2224
2225type_parameter: // CFA
2226 type_class no_attr_identifier_or_type_name
2227 { typedefTable.addToEnclosingScope( *$2, TypedefTable::TD ); }
2228 type_initializer_opt assertion_list_opt
2229 { $$ = DeclarationNode::newTypeParam( $1, $2 )->addTypeInitializer( $4 )->addAssertions( $5 ); }
2230 | type_specifier identifier_parameter_declarator
2231 ;
2232
2233type_class: // CFA
2234 OTYPE
2235 { $$ = DeclarationNode::Otype; }
2236 | DTYPE
2237 { $$ = DeclarationNode::Dtype; }
2238 | FTYPE
2239 { $$ = DeclarationNode::Ftype; }
2240 | TTYPE
2241 { $$ = DeclarationNode::Ttype; }
2242 ;
2243
2244assertion_list_opt: // CFA
2245 // empty
2246 { $$ = nullptr; }
2247 | assertion_list_opt assertion
2248 { $$ = $1 ? $1->appendList( $2 ) : $2; }
2249 ;
2250
2251assertion: // CFA
2252 '|' no_attr_identifier_or_type_name '(' type_list ')'
2253 {
2254 typedefTable.openTrait( *$2 );
2255 $$ = DeclarationNode::newTraitUse( $2, $4 );
2256 }
2257 | '|' '{' push trait_declaration_list '}'
2258 { $$ = $4; }
2259 | '|' '(' push type_parameter_list pop ')' '{' push trait_declaration_list '}' '(' type_list ')'
2260 { $$ = nullptr; }
2261 ;
2262
2263type_list: // CFA
2264 type
2265 { $$ = new ExpressionNode( new TypeExpr( maybeMoveBuildType( $1 ) ) ); }
2266 | assignment_expression
2267 | type_list ',' type
2268 { $$ = (ExpressionNode *)( $1->set_last( new ExpressionNode( new TypeExpr( maybeMoveBuildType( $3 ) ) ) ) ); }
2269 | type_list ',' assignment_expression
2270 { $$ = (ExpressionNode *)( $1->set_last( $3 )); }
2271 ;
2272
2273type_declaring_list: // CFA
2274 OTYPE type_declarator
2275 { $$ = $2; }
2276 | storage_class_list OTYPE type_declarator
2277 { $$ = $3->addQualifiers( $1 ); }
2278 | type_declaring_list ',' type_declarator
2279 { $$ = $1->appendList( $3->copySpecifiers( $1 ) ); }
2280 ;
2281
2282type_declarator: // CFA
2283 type_declarator_name assertion_list_opt
2284 { $$ = $1->addAssertions( $2 ); }
2285 | type_declarator_name assertion_list_opt '=' type
2286 { $$ = $1->addAssertions( $2 )->addType( $4 ); }
2287 ;
2288
2289type_declarator_name: // CFA
2290 no_attr_identifier_or_type_name
2291 {
2292 typedefTable.addToEnclosingScope( *$1, TypedefTable::TD );
2293 $$ = DeclarationNode::newTypeDecl( $1, 0 );
2294 }
2295 | no_attr_identifier_or_type_name '(' push type_parameter_list pop ')'
2296 {
2297 typedefTable.addToEnclosingScope( *$1, TypedefTable::TG );
2298 $$ = DeclarationNode::newTypeDecl( $1, $4 );
2299 }
2300 ;
2301
2302trait_specifier: // CFA
2303 TRAIT no_attr_identifier_or_type_name '(' push type_parameter_list pop ')' '{' '}'
2304 {
2305 typedefTable.addToEnclosingScope( *$2, TypedefTable::ID );
2306 $$ = DeclarationNode::newTrait( $2, $5, 0 );
2307 }
2308 | TRAIT no_attr_identifier_or_type_name '(' push type_parameter_list pop ')' '{'
2309 {
2310 typedefTable.enterTrait( *$2 );
2311 typedefTable.enterScope();
2312 }
2313 trait_declaration_list '}'
2314 {
2315 typedefTable.leaveTrait();
2316 typedefTable.addToEnclosingScope( *$2, TypedefTable::ID );
2317 $$ = DeclarationNode::newTrait( $2, $5, $10 );
2318 }
2319 ;
2320
2321trait_declaration_list: // CFA
2322 trait_declaration
2323 | trait_declaration_list push trait_declaration
2324 { $$ = $1->appendList( $3 ); }
2325 ;
2326
2327trait_declaration: // CFA
2328 cfa_trait_declaring_list pop ';'
2329 | trait_declaring_list pop ';'
2330 ;
2331
2332cfa_trait_declaring_list: // CFA
2333 cfa_variable_specifier
2334 {
2335 typedefTable.addToEnclosingScope2( TypedefTable::ID );
2336 $$ = $1;
2337 }
2338 | cfa_function_specifier
2339 {
2340 typedefTable.addToEnclosingScope2( TypedefTable::ID );
2341 $$ = $1;
2342 }
2343 | cfa_trait_declaring_list pop ',' push identifier_or_type_name
2344 {
2345 typedefTable.addToEnclosingScope2( *$5, TypedefTable::ID );
2346 $$ = $1->appendList( $1->cloneType( $5 ) );
2347 }
2348 ;
2349
2350trait_declaring_list: // CFA
2351 type_specifier declarator
2352 {
2353 typedefTable.addToEnclosingScope2( TypedefTable::ID );
2354 $$ = $2->addType( $1 );
2355 }
2356 | trait_declaring_list pop ',' push declarator
2357 {
2358 typedefTable.addToEnclosingScope2( TypedefTable::ID );
2359 $$ = $1->appendList( $1->cloneBaseType( $5 ) );
2360 }
2361 ;
2362
2363//***************************** EXTERNAL DEFINITIONS *****************************
2364
2365translation_unit:
2366 // empty
2367 {} // empty input file
2368 | external_definition_list
2369 { parseTree = parseTree ? parseTree->appendList( $1 ) : $1; }
2370 ;
2371
2372external_definition_list:
2373 external_definition
2374 | external_definition_list push external_definition
2375 { $$ = $1 ? $1->appendList( $3 ) : $3; }
2376 ;
2377
2378external_definition_list_opt:
2379 // empty
2380 { $$ = nullptr; }
2381 | external_definition_list
2382 ;
2383
2384external_definition:
2385 declaration
2386 | external_function_definition
2387 | ASM '(' string_literal ')' ';' // GCC, global assembler statement
2388 {
2389 $$ = DeclarationNode::newAsmStmt( new StatementNode( build_asmstmt( false, $3, 0 ) ) );
2390 }
2391 | EXTERN STRINGliteral // C++-style linkage specifier
2392 {
2393 linkageStack.push( linkage ); // handle nested extern "C"/"Cforall"
2394 linkage = LinkageSpec::linkageUpdate( yylloc, linkage, $2 );
2395 }
2396 '{' external_definition_list_opt '}'
2397 {
2398 linkage = linkageStack.top();
2399 linkageStack.pop();
2400 $$ = $5;
2401 }
2402 | EXTENSION external_definition // GCC, multiple __extension__ allowed, meaning unknown
2403 {
2404 distExt( $2 ); // mark all fields in list
2405 $$ = $2;
2406 }
2407 | type_qualifier_list '{' external_definition_list '}' // CFA, namespace
2408 ;
2409
2410external_function_definition:
2411 function_definition
2412 // These rules are a concession to the "implicit int" type_specifier because there is a significant amount of
2413 // legacy code with global functions missing the type-specifier for the return type, and assuming "int".
2414 // Parsing is possible because function_definition does not appear in the context of an expression (nested
2415 // functions preclude this concession, i.e., all nested function must have a return type). A function prototype
2416 // declaration must still have a type_specifier. OBSOLESCENT (see 1)
2417 | function_declarator compound_statement
2418 {
2419 typedefTable.addToEnclosingScope( TypedefTable::ID );
2420 typedefTable.leaveScope();
2421 $$ = $1->addFunctionBody( $2 );
2422 }
2423 | KR_function_declarator KR_declaration_list_opt compound_statement
2424 {
2425 typedefTable.addToEnclosingScope( TypedefTable::ID );
2426 typedefTable.leaveScope();
2427 $$ = $1->addOldDeclList( $2 )->addFunctionBody( $3 );
2428 }
2429 ;
2430
2431with_clause_opt:
2432 // empty
2433 { $$ = nullptr; }
2434 | WITH '(' tuple_expression_list ')'
2435 { $$ = $3; }
2436 ;
2437
2438function_definition:
2439 cfa_function_declaration with_clause_opt compound_statement // CFA
2440 {
2441 typedefTable.addToEnclosingScope( TypedefTable::ID );
2442 typedefTable.leaveScope();
2443 // Add the function body to the last identifier in the function definition list, i.e., foo3:
2444 // [const double] foo1(), foo2( int ), foo3( double ) { return 3.0; }
2445 $1->get_last()->addFunctionBody( $3, $2 );
2446 $$ = $1;
2447 }
2448 | declaration_specifier function_declarator with_clause_opt compound_statement
2449 {
2450 rebindForall( $1, $2 );
2451 typedefTable.addToEnclosingScope( TypedefTable::ID );
2452 typedefTable.leaveScope();
2453 $$ = $2->addFunctionBody( $4, $3 )->addType( $1 );
2454 }
2455 // handles default int return type, OBSOLESCENT (see 1)
2456 | type_qualifier_list function_declarator with_clause_opt compound_statement
2457 {
2458 typedefTable.addToEnclosingScope( TypedefTable::ID );
2459 typedefTable.leaveScope();
2460 $$ = $2->addFunctionBody( $4, $3 )->addQualifiers( $1 );
2461 }
2462 // handles default int return type, OBSOLESCENT (see 1)
2463 | declaration_qualifier_list function_declarator with_clause_opt compound_statement
2464 {
2465 typedefTable.addToEnclosingScope( TypedefTable::ID );
2466 typedefTable.leaveScope();
2467 $$ = $2->addFunctionBody( $4, $3 )->addQualifiers( $1 );
2468 }
2469 // handles default int return type, OBSOLESCENT (see 1)
2470 | declaration_qualifier_list type_qualifier_list function_declarator with_clause_opt compound_statement
2471 {
2472 typedefTable.addToEnclosingScope( TypedefTable::ID );
2473 typedefTable.leaveScope();
2474 $$ = $3->addFunctionBody( $5, $4 )->addQualifiers( $2 )->addQualifiers( $1 );
2475 }
2476
2477 // Old-style K&R function definition, OBSOLESCENT (see 4)
2478 | declaration_specifier KR_function_declarator KR_declaration_list_opt with_clause_opt compound_statement
2479 {
2480 rebindForall( $1, $2 );
2481 typedefTable.addToEnclosingScope( TypedefTable::ID );
2482 typedefTable.leaveScope();
2483 $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addType( $1 );
2484 }
2485 // handles default int return type, OBSOLESCENT (see 1)
2486 | type_qualifier_list KR_function_declarator KR_declaration_list_opt with_clause_opt compound_statement
2487 {
2488 typedefTable.addToEnclosingScope( TypedefTable::ID );
2489 typedefTable.leaveScope();
2490 $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addQualifiers( $1 );
2491 }
2492 // handles default int return type, OBSOLESCENT (see 1)
2493 | declaration_qualifier_list KR_function_declarator KR_declaration_list_opt with_clause_opt compound_statement
2494 {
2495 typedefTable.addToEnclosingScope( TypedefTable::ID );
2496 typedefTable.leaveScope();
2497 $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addQualifiers( $1 );
2498 }
2499 // handles default int return type, OBSOLESCENT (see 1)
2500 | declaration_qualifier_list type_qualifier_list KR_function_declarator KR_declaration_list_opt with_clause_opt compound_statement
2501 {
2502 typedefTable.addToEnclosingScope( TypedefTable::ID );
2503 typedefTable.leaveScope();
2504 $$ = $3->addOldDeclList( $4 )->addFunctionBody( $6, $5 )->addQualifiers( $2 )->addQualifiers( $1 );
2505 }
2506 ;
2507
2508declarator:
2509 variable_declarator
2510 | variable_type_redeclarator
2511 | function_declarator
2512 ;
2513
2514subrange:
2515 constant_expression '~' constant_expression // CFA, integer subrange
2516 { $$ = new ExpressionNode( new RangeExpr( maybeMoveBuild< Expression >( $1 ), maybeMoveBuild< Expression >( $3 ) ) ); }
2517 ;
2518
2519asm_name_opt: // GCC
2520 // empty
2521 { $$ = nullptr; }
2522 | ASM '(' string_literal ')' attribute_list_opt
2523 {
2524 DeclarationNode * name = new DeclarationNode();
2525 name->asmName = $3;
2526 $$ = name->addQualifiers( $5 );
2527 }
2528 ;
2529
2530attribute_list_opt: // GCC
2531 // empty
2532 { $$ = nullptr; }
2533 | attribute_list
2534 ;
2535
2536attribute_list: // GCC
2537 attribute
2538 | attribute_list attribute
2539 { $$ = $2->addQualifiers( $1 ); }
2540 ;
2541
2542attribute: // GCC
2543 ATTRIBUTE '(' '(' attribute_name_list ')' ')'
2544 { $$ = $4; }
2545 ;
2546
2547attribute_name_list: // GCC
2548 attribute_name
2549 | attribute_name_list ',' attribute_name
2550 { $$ = $3->addQualifiers( $1 ); }
2551 ;
2552
2553attribute_name: // GCC
2554 // empty
2555 { $$ = nullptr; }
2556 | attr_name
2557 { $$ = DeclarationNode::newAttribute( $1 ); }
2558 | attr_name '(' argument_expression_list ')'
2559 { $$ = DeclarationNode::newAttribute( $1, $3 ); }
2560 ;
2561
2562attr_name: // GCC
2563 IDENTIFIER
2564 | quasi_keyword
2565 | TYPEDEFname
2566 | TYPEGENname
2567 | FALLTHROUGH
2568 { $$ = Token{ new string( "fallthrough" ), { nullptr, -1 } }; }
2569 | CONST
2570 { $$ = Token{ new string( "__const__" ), { nullptr, -1 } }; }
2571 ;
2572
2573// ============================================================================
2574// The following sections are a series of grammar patterns used to parse declarators. Multiple patterns are necessary
2575// because the type of an identifier in wrapped around the identifier in the same form as its usage in an expression, as
2576// in:
2577//
2578// int (*f())[10] { ... };
2579// ... (*f())[3] += 1; // definition mimics usage
2580//
2581// Because these patterns are highly recursive, changes at a lower level in the recursion require copying some or all of
2582// the pattern. Each of these patterns has some subtle variation to ensure correct syntax in a particular context.
2583// ============================================================================
2584
2585// ----------------------------------------------------------------------------
2586// The set of valid declarators before a compound statement for defining a function is less than the set of declarators
2587// to define a variable or function prototype, e.g.:
2588//
2589// valid declaration invalid definition
2590// ----------------- ------------------
2591// int f; int f {}
2592// int *f; int *f {}
2593// int f[10]; int f[10] {}
2594// int (*f)(int); int (*f)(int) {}
2595//
2596// To preclude this syntactic anomaly requires separating the grammar rules for variable and function declarators, hence
2597// variable_declarator and function_declarator.
2598// ----------------------------------------------------------------------------
2599
2600// This pattern parses a declaration of a variable that is not redefining a typedef name. The pattern precludes
2601// declaring an array of functions versus a pointer to an array of functions.
2602
2603variable_declarator:
2604 paren_identifier attribute_list_opt
2605 { $$ = $1->addQualifiers( $2 ); }
2606 | variable_ptr
2607 | variable_array attribute_list_opt
2608 { $$ = $1->addQualifiers( $2 ); }
2609 | variable_function attribute_list_opt
2610 { $$ = $1->addQualifiers( $2 ); }
2611 ;
2612
2613paren_identifier:
2614 identifier
2615 {
2616 typedefTable.setNextIdentifier( *$1 );
2617 $$ = DeclarationNode::newName( $1 );
2618 }
2619 | '(' paren_identifier ')' // redundant parenthesis
2620 { $$ = $2; }
2621 ;
2622
2623variable_ptr:
2624 ptrref_operator variable_declarator
2625 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2626 | ptrref_operator type_qualifier_list variable_declarator
2627 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
2628 | '(' variable_ptr ')' attribute_list_opt
2629 { $$ = $2->addQualifiers( $4 ); } // redundant parenthesis
2630 ;
2631
2632variable_array:
2633 paren_identifier array_dimension
2634 { $$ = $1->addArray( $2 ); }
2635 | '(' variable_ptr ')' array_dimension
2636 { $$ = $2->addArray( $4 ); }
2637 | '(' variable_array ')' multi_array_dimension // redundant parenthesis
2638 { $$ = $2->addArray( $4 ); }
2639 | '(' variable_array ')' // redundant parenthesis
2640 { $$ = $2; }
2641 ;
2642
2643variable_function:
2644 '(' variable_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2645 { $$ = $2->addParamList( $6 ); }
2646 | '(' variable_function ')' // redundant parenthesis
2647 { $$ = $2; }
2648 ;
2649
2650// This pattern parses a function declarator that is not redefining a typedef name. For non-nested functions, there is
2651// no context where a function definition can redefine a typedef name, i.e., the typedef and function name cannot exist
2652// is the same scope. The pattern precludes returning arrays and functions versus pointers to arrays and functions.
2653
2654function_declarator:
2655 function_no_ptr attribute_list_opt
2656 { $$ = $1->addQualifiers( $2 ); }
2657 | function_ptr
2658 | function_array attribute_list_opt
2659 { $$ = $1->addQualifiers( $2 ); }
2660 ;
2661
2662function_no_ptr:
2663 paren_identifier '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2664 { $$ = $1->addParamList( $4 ); }
2665 | '(' function_ptr ')' '(' push parameter_type_list_opt pop ')'
2666 { $$ = $2->addParamList( $6 ); }
2667 | '(' function_no_ptr ')' // redundant parenthesis
2668 { $$ = $2; }
2669 ;
2670
2671function_ptr:
2672 ptrref_operator function_declarator
2673 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2674 | ptrref_operator type_qualifier_list function_declarator
2675 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
2676 | '(' function_ptr ')'
2677 { $$ = $2; }
2678 ;
2679
2680function_array:
2681 '(' function_ptr ')' array_dimension
2682 { $$ = $2->addArray( $4 ); }
2683 | '(' function_array ')' multi_array_dimension // redundant parenthesis
2684 { $$ = $2->addArray( $4 ); }
2685 | '(' function_array ')' // redundant parenthesis
2686 { $$ = $2; }
2687 ;
2688
2689// This pattern parses an old-style K&R function declarator (OBSOLESCENT, see 4)
2690//
2691// f( a, b, c ) int a, *b, c[]; {}
2692//
2693// that is not redefining a typedef name (see function_declarator for additional comments). The pattern precludes
2694// returning arrays and functions versus pointers to arrays and functions.
2695
2696KR_function_declarator:
2697 KR_function_no_ptr
2698 | KR_function_ptr
2699 | KR_function_array
2700 ;
2701
2702KR_function_no_ptr:
2703 paren_identifier '(' identifier_list ')' // function_declarator handles empty parameter
2704 { $$ = $1->addIdList( $3 ); }
2705 | '(' KR_function_ptr ')' '(' push parameter_type_list_opt pop ')'
2706 { $$ = $2->addParamList( $6 ); }
2707 | '(' KR_function_no_ptr ')' // redundant parenthesis
2708 { $$ = $2; }
2709 ;
2710
2711KR_function_ptr:
2712 ptrref_operator KR_function_declarator
2713 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2714 | ptrref_operator type_qualifier_list KR_function_declarator
2715 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
2716 | '(' KR_function_ptr ')'
2717 { $$ = $2; }
2718 ;
2719
2720KR_function_array:
2721 '(' KR_function_ptr ')' array_dimension
2722 { $$ = $2->addArray( $4 ); }
2723 | '(' KR_function_array ')' multi_array_dimension // redundant parenthesis
2724 { $$ = $2->addArray( $4 ); }
2725 | '(' KR_function_array ')' // redundant parenthesis
2726 { $$ = $2; }
2727 ;
2728
2729// This pattern parses a declaration for a variable or function prototype that redefines a type name, e.g.:
2730//
2731// typedef int foo;
2732// {
2733// int foo; // redefine typedef name in new scope
2734// }
2735//
2736// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
2737// and functions versus pointers to arrays and functions.
2738
2739variable_type_redeclarator:
2740 paren_type attribute_list_opt
2741 { $$ = $1->addQualifiers( $2 ); }
2742 | type_ptr
2743 | type_array attribute_list_opt
2744 { $$ = $1->addQualifiers( $2 ); }
2745 | type_function attribute_list_opt
2746 { $$ = $1->addQualifiers( $2 ); }
2747 ;
2748
2749paren_type:
2750 typedef
2751 | '(' paren_type ')'
2752 { $$ = $2; }
2753 ;
2754
2755type_ptr:
2756 ptrref_operator variable_type_redeclarator
2757 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2758 | ptrref_operator type_qualifier_list variable_type_redeclarator
2759 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
2760 | '(' type_ptr ')' attribute_list_opt
2761 { $$ = $2->addQualifiers( $4 ); }
2762 ;
2763
2764type_array:
2765 paren_type array_dimension
2766 { $$ = $1->addArray( $2 ); }
2767 | '(' type_ptr ')' array_dimension
2768 { $$ = $2->addArray( $4 ); }
2769 | '(' type_array ')' multi_array_dimension // redundant parenthesis
2770 { $$ = $2->addArray( $4 ); }
2771 | '(' type_array ')' // redundant parenthesis
2772 { $$ = $2; }
2773 ;
2774
2775type_function:
2776 paren_type '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2777 { $$ = $1->addParamList( $4 ); }
2778 | '(' type_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2779 { $$ = $2->addParamList( $6 ); }
2780 | '(' type_function ')' // redundant parenthesis
2781 { $$ = $2; }
2782 ;
2783
2784// This pattern parses a declaration for a parameter variable of a function prototype or actual that is not redefining a
2785// typedef name and allows the C99 array options, which can only appear in a parameter list. The pattern precludes
2786// declaring an array of functions versus a pointer to an array of functions, and returning arrays and functions versus
2787// pointers to arrays and functions.
2788
2789identifier_parameter_declarator:
2790 paren_identifier attribute_list_opt
2791 { $$ = $1->addQualifiers( $2 ); }
2792 | '&' MUTEX paren_identifier attribute_list_opt
2793 { $$ = $3->addPointer( DeclarationNode::newPointer( DeclarationNode::newTypeQualifier( Type::Mutex ), OperKinds::AddressOf ) )->addQualifiers( $4 ); }
2794 | identifier_parameter_ptr
2795 | identifier_parameter_array attribute_list_opt
2796 { $$ = $1->addQualifiers( $2 ); }
2797 | identifier_parameter_function attribute_list_opt
2798 { $$ = $1->addQualifiers( $2 ); }
2799 ;
2800
2801identifier_parameter_ptr:
2802 ptrref_operator identifier_parameter_declarator
2803 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2804 | ptrref_operator type_qualifier_list identifier_parameter_declarator
2805 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
2806 | '(' identifier_parameter_ptr ')' attribute_list_opt
2807 { $$ = $2->addQualifiers( $4 ); }
2808 ;
2809
2810identifier_parameter_array:
2811 paren_identifier array_parameter_dimension
2812 { $$ = $1->addArray( $2 ); }
2813 | '(' identifier_parameter_ptr ')' array_dimension
2814 { $$ = $2->addArray( $4 ); }
2815 | '(' identifier_parameter_array ')' multi_array_dimension // redundant parenthesis
2816 { $$ = $2->addArray( $4 ); }
2817 | '(' identifier_parameter_array ')' // redundant parenthesis
2818 { $$ = $2; }
2819 ;
2820
2821identifier_parameter_function:
2822 paren_identifier '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2823 { $$ = $1->addParamList( $4 ); }
2824 | '(' identifier_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2825 { $$ = $2->addParamList( $6 ); }
2826 | '(' identifier_parameter_function ')' // redundant parenthesis
2827 { $$ = $2; }
2828 ;
2829
2830// This pattern parses a declaration for a parameter variable or function prototype that is redefining a typedef name,
2831// e.g.:
2832//
2833// typedef int foo;
2834// forall( otype T ) struct foo;
2835// int f( int foo ); // redefine typedef name in new scope
2836//
2837// and allows the C99 array options, which can only appear in a parameter list.
2838
2839type_parameter_redeclarator:
2840 typedef attribute_list_opt
2841 { $$ = $1->addQualifiers( $2 ); }
2842 | '&' MUTEX typedef attribute_list_opt
2843 { $$ = $3->addPointer( DeclarationNode::newPointer( DeclarationNode::newTypeQualifier( Type::Mutex ), OperKinds::AddressOf ) )->addQualifiers( $4 ); }
2844 | type_parameter_ptr
2845 | type_parameter_array attribute_list_opt
2846 { $$ = $1->addQualifiers( $2 ); }
2847 | type_parameter_function attribute_list_opt
2848 { $$ = $1->addQualifiers( $2 ); }
2849 ;
2850
2851typedef:
2852 TYPEDEFname
2853 {
2854 typedefTable.setNextIdentifier( *$1 );
2855 $$ = DeclarationNode::newName( $1 );
2856 }
2857 | TYPEGENname
2858 {
2859 typedefTable.setNextIdentifier( *$1 );
2860 $$ = DeclarationNode::newName( $1 );
2861 }
2862 ;
2863
2864type_parameter_ptr:
2865 ptrref_operator type_parameter_redeclarator
2866 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2867 | ptrref_operator type_qualifier_list type_parameter_redeclarator
2868 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
2869 | '(' type_parameter_ptr ')' attribute_list_opt
2870 { $$ = $2->addQualifiers( $4 ); }
2871 ;
2872
2873type_parameter_array:
2874 typedef array_parameter_dimension
2875 { $$ = $1->addArray( $2 ); }
2876 | '(' type_parameter_ptr ')' array_parameter_dimension
2877 { $$ = $2->addArray( $4 ); }
2878 ;
2879
2880type_parameter_function:
2881 typedef '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2882 { $$ = $1->addParamList( $4 ); }
2883 | '(' type_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2884 { $$ = $2->addParamList( $6 ); }
2885 ;
2886
2887// This pattern parses a declaration of an abstract variable or function prototype, i.e., there is no identifier to
2888// which the type applies, e.g.:
2889//
2890// sizeof( int );
2891// sizeof( int * );
2892// sizeof( int [10] );
2893// sizeof( int (*)() );
2894// sizeof( int () );
2895//
2896// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
2897// and functions versus pointers to arrays and functions.
2898
2899abstract_declarator:
2900 abstract_ptr
2901 | abstract_array attribute_list_opt
2902 { $$ = $1->addQualifiers( $2 ); }
2903 | abstract_function attribute_list_opt
2904 { $$ = $1->addQualifiers( $2 ); }
2905 ;
2906
2907abstract_ptr:
2908 ptrref_operator
2909 { $$ = DeclarationNode::newPointer( 0, $1 ); }
2910 | ptrref_operator type_qualifier_list
2911 { $$ = DeclarationNode::newPointer( $2, $1 ); }
2912 | ptrref_operator abstract_declarator
2913 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2914 | ptrref_operator type_qualifier_list abstract_declarator
2915 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
2916 | '(' abstract_ptr ')' attribute_list_opt
2917 { $$ = $2->addQualifiers( $4 ); }
2918 ;
2919
2920abstract_array:
2921 array_dimension
2922 | '(' abstract_ptr ')' array_dimension
2923 { $$ = $2->addArray( $4 ); }
2924 | '(' abstract_array ')' multi_array_dimension // redundant parenthesis
2925 { $$ = $2->addArray( $4 ); }
2926 | '(' abstract_array ')' // redundant parenthesis
2927 { $$ = $2; }
2928 ;
2929
2930abstract_function:
2931 '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2932 { $$ = DeclarationNode::newFunction( nullptr, nullptr, $3, nullptr ); }
2933 | '(' abstract_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2934 { $$ = $2->addParamList( $6 ); }
2935 | '(' abstract_function ')' // redundant parenthesis
2936 { $$ = $2; }
2937 ;
2938
2939array_dimension:
2940 // Only the first dimension can be empty.
2941 '[' ']'
2942 { $$ = DeclarationNode::newArray( 0, 0, false ); }
2943 | '[' ']' multi_array_dimension
2944 { $$ = DeclarationNode::newArray( 0, 0, false )->addArray( $3 ); }
2945 | multi_array_dimension
2946 ;
2947
2948multi_array_dimension:
2949 '[' push assignment_expression pop ']'
2950 { $$ = DeclarationNode::newArray( $3, 0, false ); }
2951 | '[' push '*' pop ']' // C99
2952 { $$ = DeclarationNode::newVarArray( 0 ); }
2953 | multi_array_dimension '[' push assignment_expression pop ']'
2954 { $$ = $1->addArray( DeclarationNode::newArray( $4, 0, false ) ); }
2955 | multi_array_dimension '[' push '*' pop ']' // C99
2956 { $$ = $1->addArray( DeclarationNode::newVarArray( 0 ) ); }
2957 ;
2958
2959// This pattern parses a declaration of a parameter abstract variable or function prototype, i.e., there is no
2960// identifier to which the type applies, e.g.:
2961//
2962// int f( int ); // not handled here
2963// int f( int * ); // abstract function-prototype parameter; no parameter name specified
2964// int f( int (*)() ); // abstract function-prototype parameter; no parameter name specified
2965// int f( int (int) ); // abstract function-prototype parameter; no parameter name specified
2966//
2967// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
2968// and functions versus pointers to arrays and functions. In addition, the pattern handles the
2969// special meaning of parenthesis around a typedef name:
2970//
2971// ISO/IEC 9899:1999 Section 6.7.5.3(11) : "In a parameter declaration, a single typedef name in
2972// parentheses is taken to be an abstract declarator that specifies a function with a single parameter,
2973// not as redundant parentheses around the identifier."
2974//
2975// For example:
2976//
2977// typedef float T;
2978// int f( int ( T [5] ) ); // see abstract_parameter_declarator
2979// int g( int ( T ( int ) ) ); // see abstract_parameter_declarator
2980// int f( int f1( T a[5] ) ); // see identifier_parameter_declarator
2981// int g( int g1( T g2( int p ) ) ); // see identifier_parameter_declarator
2982//
2983// In essence, a '(' immediately to the left of typedef name, T, is interpreted as starting a parameter type list, and
2984// not as redundant parentheses around a redeclaration of T. Finally, the pattern also precludes declaring an array of
2985// functions versus a pointer to an array of functions, and returning arrays and functions versus pointers to arrays and
2986// functions.
2987
2988abstract_parameter_declarator:
2989 abstract_parameter_ptr
2990 | '&' MUTEX attribute_list_opt
2991 { $$ = DeclarationNode::newPointer( DeclarationNode::newTypeQualifier( Type::Mutex ), OperKinds::AddressOf )->addQualifiers( $3 ); }
2992 | abstract_parameter_array attribute_list_opt
2993 { $$ = $1->addQualifiers( $2 ); }
2994 | abstract_parameter_function attribute_list_opt
2995 { $$ = $1->addQualifiers( $2 ); }
2996 ;
2997
2998abstract_parameter_ptr:
2999 ptrref_operator
3000 { $$ = DeclarationNode::newPointer( nullptr, $1 ); }
3001 | ptrref_operator type_qualifier_list
3002 { $$ = DeclarationNode::newPointer( $2, $1 ); }
3003 | ptrref_operator abstract_parameter_declarator
3004 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
3005 | ptrref_operator type_qualifier_list abstract_parameter_declarator
3006 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3007 | '(' abstract_parameter_ptr ')' attribute_list_opt
3008 { $$ = $2->addQualifiers( $4 ); }
3009 ;
3010
3011abstract_parameter_array:
3012 array_parameter_dimension
3013 | '(' abstract_parameter_ptr ')' array_parameter_dimension
3014 { $$ = $2->addArray( $4 ); }
3015 | '(' abstract_parameter_array ')' multi_array_dimension // redundant parenthesis
3016 { $$ = $2->addArray( $4 ); }
3017 | '(' abstract_parameter_array ')' // redundant parenthesis
3018 { $$ = $2; }
3019 ;
3020
3021abstract_parameter_function:
3022 '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3023 { $$ = DeclarationNode::newFunction( nullptr, nullptr, $3, nullptr ); }
3024 | '(' abstract_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3025 { $$ = $2->addParamList( $6 ); }
3026 | '(' abstract_parameter_function ')' // redundant parenthesis
3027 { $$ = $2; }
3028 ;
3029
3030array_parameter_dimension:
3031 // Only the first dimension can be empty or have qualifiers.
3032 array_parameter_1st_dimension
3033 | array_parameter_1st_dimension multi_array_dimension
3034 { $$ = $1->addArray( $2 ); }
3035 | multi_array_dimension
3036 ;
3037
3038// The declaration of an array parameter has additional syntax over arrays in normal variable declarations:
3039//
3040// ISO/IEC 9899:1999 Section 6.7.5.2(1) : "The optional type qualifiers and the keyword static shall appear only in
3041// a declaration of a function parameter with an array type, and then only in the outermost array type derivation."
3042
3043array_parameter_1st_dimension:
3044 '[' ']'
3045 { $$ = DeclarationNode::newArray( 0, 0, false ); }
3046 // multi_array_dimension handles the '[' '*' ']' case
3047 | '[' push type_qualifier_list '*' pop ']' // remaining C99
3048 { $$ = DeclarationNode::newVarArray( $3 ); }
3049 | '[' push type_qualifier_list pop ']'
3050 { $$ = DeclarationNode::newArray( 0, $3, false ); }
3051 // multi_array_dimension handles the '[' assignment_expression ']' case
3052 | '[' push type_qualifier_list assignment_expression pop ']'
3053 { $$ = DeclarationNode::newArray( $4, $3, false ); }
3054 | '[' push STATIC type_qualifier_list_opt assignment_expression pop ']'
3055 { $$ = DeclarationNode::newArray( $5, $4, true ); }
3056 | '[' push type_qualifier_list STATIC assignment_expression pop ']'
3057 { $$ = DeclarationNode::newArray( $5, $3, true ); }
3058 ;
3059
3060// This pattern parses a declaration of an abstract variable, but does not allow "int ()" for a function pointer.
3061//
3062// struct S {
3063// int;
3064// int *;
3065// int [10];
3066// int (*)();
3067// };
3068
3069variable_abstract_declarator:
3070 variable_abstract_ptr
3071 | variable_abstract_array attribute_list_opt
3072 { $$ = $1->addQualifiers( $2 ); }
3073 | variable_abstract_function attribute_list_opt
3074 { $$ = $1->addQualifiers( $2 ); }
3075 ;
3076
3077variable_abstract_ptr:
3078 ptrref_operator
3079 { $$ = DeclarationNode::newPointer( 0, $1 ); }
3080 | ptrref_operator type_qualifier_list
3081 { $$ = DeclarationNode::newPointer( $2, $1 ); }
3082 | ptrref_operator variable_abstract_declarator
3083 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3084 | ptrref_operator type_qualifier_list variable_abstract_declarator
3085 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3086 | '(' variable_abstract_ptr ')' attribute_list_opt
3087 { $$ = $2->addQualifiers( $4 ); }
3088 ;
3089
3090variable_abstract_array:
3091 array_dimension
3092 | '(' variable_abstract_ptr ')' array_dimension
3093 { $$ = $2->addArray( $4 ); }
3094 | '(' variable_abstract_array ')' multi_array_dimension // redundant parenthesis
3095 { $$ = $2->addArray( $4 ); }
3096 | '(' variable_abstract_array ')' // redundant parenthesis
3097 { $$ = $2; }
3098 ;
3099
3100variable_abstract_function:
3101 '(' variable_abstract_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3102 { $$ = $2->addParamList( $6 ); }
3103 | '(' variable_abstract_function ')' // redundant parenthesis
3104 { $$ = $2; }
3105 ;
3106
3107// This pattern parses a new-style declaration for a parameter variable or function prototype that is either an
3108// identifier or typedef name and allows the C99 array options, which can only appear in a parameter list.
3109
3110cfa_identifier_parameter_declarator_tuple: // CFA
3111 cfa_identifier_parameter_declarator_no_tuple
3112 | cfa_abstract_tuple
3113 | type_qualifier_list cfa_abstract_tuple
3114 { $$ = $2->addQualifiers( $1 ); }
3115 ;
3116
3117cfa_identifier_parameter_declarator_no_tuple: // CFA
3118 cfa_identifier_parameter_ptr
3119 | cfa_identifier_parameter_array
3120 ;
3121
3122cfa_identifier_parameter_ptr: // CFA
3123 // No SUE declaration in parameter list.
3124 ptrref_operator type_specifier_nobody
3125 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3126 | type_qualifier_list ptrref_operator type_specifier_nobody
3127 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3128 | ptrref_operator cfa_abstract_function
3129 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3130 | type_qualifier_list ptrref_operator cfa_abstract_function
3131 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3132 | ptrref_operator cfa_identifier_parameter_declarator_tuple
3133 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3134 | type_qualifier_list ptrref_operator cfa_identifier_parameter_declarator_tuple
3135 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3136 ;
3137
3138cfa_identifier_parameter_array: // CFA
3139 // Only the first dimension can be empty or have qualifiers. Empty dimension must be factored out due to
3140 // shift/reduce conflict with new-style empty (void) function return type.
3141 '[' ']' type_specifier_nobody
3142 { $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
3143 | cfa_array_parameter_1st_dimension type_specifier_nobody
3144 { $$ = $2->addNewArray( $1 ); }
3145 | '[' ']' multi_array_dimension type_specifier_nobody
3146 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
3147 | cfa_array_parameter_1st_dimension multi_array_dimension type_specifier_nobody
3148 { $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
3149 | multi_array_dimension type_specifier_nobody
3150 { $$ = $2->addNewArray( $1 ); }
3151
3152 | '[' ']' cfa_identifier_parameter_ptr
3153 { $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
3154 | cfa_array_parameter_1st_dimension cfa_identifier_parameter_ptr
3155 { $$ = $2->addNewArray( $1 ); }
3156 | '[' ']' multi_array_dimension cfa_identifier_parameter_ptr
3157 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
3158 | cfa_array_parameter_1st_dimension multi_array_dimension cfa_identifier_parameter_ptr
3159 { $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
3160 | multi_array_dimension cfa_identifier_parameter_ptr
3161 { $$ = $2->addNewArray( $1 ); }
3162 ;
3163
3164cfa_array_parameter_1st_dimension:
3165 '[' push type_qualifier_list '*' pop ']' // remaining C99
3166 { $$ = DeclarationNode::newVarArray( $3 ); }
3167 | '[' push type_qualifier_list assignment_expression pop ']'
3168 { $$ = DeclarationNode::newArray( $4, $3, false ); }
3169 | '[' push declaration_qualifier_list assignment_expression pop ']'
3170 // declaration_qualifier_list must be used because of shift/reduce conflict with
3171 // assignment_expression, so a semantic check is necessary to preclude them as a type_qualifier cannot
3172 // appear in this context.
3173 { $$ = DeclarationNode::newArray( $4, $3, true ); }
3174 | '[' push declaration_qualifier_list type_qualifier_list assignment_expression pop ']'
3175 { $$ = DeclarationNode::newArray( $5, $4->addQualifiers( $3 ), true ); }
3176 ;
3177
3178// This pattern parses a new-style declaration of an abstract variable or function prototype, i.e., there is no
3179// identifier to which the type applies, e.g.:
3180//
3181// [int] f( int ); // abstract variable parameter; no parameter name specified
3182// [int] f( [int] (int) ); // abstract function-prototype parameter; no parameter name specified
3183//
3184// These rules need LR(3):
3185//
3186// cfa_abstract_tuple identifier_or_type_name
3187// '[' cfa_parameter_list ']' identifier_or_type_name '(' cfa_parameter_type_list_opt ')'
3188//
3189// since a function return type can be syntactically identical to a tuple type:
3190//
3191// [int, int] t;
3192// [int, int] f( int );
3193//
3194// Therefore, it is necessary to look at the token after identifier_or_type_name to know when to reduce
3195// cfa_abstract_tuple. To make this LR(1), several rules have to be flattened (lengthened) to allow the necessary
3196// lookahead. To accomplish this, cfa_abstract_declarator has an entry point without tuple, and tuple declarations are
3197// duplicated when appearing with cfa_function_specifier.
3198
3199cfa_abstract_declarator_tuple: // CFA
3200 cfa_abstract_tuple
3201 | type_qualifier_list cfa_abstract_tuple
3202 { $$ = $2->addQualifiers( $1 ); }
3203 | cfa_abstract_declarator_no_tuple
3204 ;
3205
3206cfa_abstract_declarator_no_tuple: // CFA
3207 cfa_abstract_ptr
3208 | cfa_abstract_array
3209 ;
3210
3211cfa_abstract_ptr: // CFA
3212 ptrref_operator type_specifier
3213 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3214 | type_qualifier_list ptrref_operator type_specifier
3215 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3216 | ptrref_operator cfa_abstract_function
3217 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3218 | type_qualifier_list ptrref_operator cfa_abstract_function
3219 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3220 | ptrref_operator cfa_abstract_declarator_tuple
3221 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3222 | type_qualifier_list ptrref_operator cfa_abstract_declarator_tuple
3223 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3224 ;
3225
3226cfa_abstract_array: // CFA
3227 // Only the first dimension can be empty. Empty dimension must be factored out due to shift/reduce conflict with
3228 // empty (void) function return type.
3229 '[' ']' type_specifier
3230 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
3231 | '[' ']' multi_array_dimension type_specifier
3232 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
3233 | multi_array_dimension type_specifier
3234 { $$ = $2->addNewArray( $1 ); }
3235 | '[' ']' cfa_abstract_ptr
3236 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
3237 | '[' ']' multi_array_dimension cfa_abstract_ptr
3238 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
3239 | multi_array_dimension cfa_abstract_ptr
3240 { $$ = $2->addNewArray( $1 ); }
3241 ;
3242
3243cfa_abstract_tuple: // CFA
3244 '[' push cfa_abstract_parameter_list pop ']'
3245 { $$ = DeclarationNode::newTuple( $3 ); }
3246 ;
3247
3248cfa_abstract_function: // CFA
3249// '[' ']' '(' cfa_parameter_type_list_opt ')'
3250// { $$ = DeclarationNode::newFunction( nullptr, DeclarationNode::newTuple( nullptr ), $4, nullptr ); }
3251 cfa_abstract_tuple '(' push cfa_parameter_type_list_opt pop ')'
3252 { $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
3253 | cfa_function_return '(' push cfa_parameter_type_list_opt pop ')'
3254 { $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
3255 ;
3256
3257// 1) ISO/IEC 9899:1999 Section 6.7.2(2) : "At least one type specifier shall be given in the declaration specifiers in
3258// each declaration, and in the specifier-qualifier list in each structure declaration and type name."
3259//
3260// 2) ISO/IEC 9899:1999 Section 6.11.5(1) : "The placement of a storage-class specifier other than at the beginning of
3261// the declaration specifiers in a declaration is an obsolescent feature."
3262//
3263// 3) ISO/IEC 9899:1999 Section 6.11.6(1) : "The use of function declarators with empty parentheses (not
3264// prototype-format parameter type declarators) is an obsolescent feature."
3265//
3266// 4) ISO/IEC 9899:1999 Section 6.11.7(1) : "The use of function definitions with separate parameter identifier and
3267// declaration lists (not prototype-format parameter type and identifier declarators) is an obsolescent feature.
3268
3269//************************* MISCELLANEOUS ********************************
3270
3271comma_opt: // redundant comma
3272 // empty
3273 | ','
3274 ;
3275
3276default_initialize_opt:
3277 // empty
3278 { $$ = nullptr; }
3279 | '=' assignment_expression
3280 { $$ = $2; }
3281 ;
3282
3283%%
3284// ----end of grammar----
3285
3286// Local Variables: //
3287// mode: c++ //
3288// tab-width: 4 //
3289// compile-command: "make install" //
3290// End: //
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