source: src/Parser/parser.yy@ f810e09

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 f810e09 was f810e09, checked in by Rob Schluntz <rschlunt@…>, 8 years ago

Implement unmanaged C compound-literal
  • Property mode set to 100644
File size: 121.0 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 : Fri Mar 16 17:24:44 2018
13// Update Count : 3081
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
129bool forall = false; // aggregate have one or more forall qualifiers ?
130
131// https://www.gnu.org/software/bison/manual/bison.html#Location-Type
132#define YYLLOC_DEFAULT(Cur, Rhs, N) \
133if ( N ) { \
134 (Cur).first_line = YYRHSLOC( Rhs, 1 ).first_line; \
135 (Cur).first_column = YYRHSLOC( Rhs, 1 ).first_column; \
136 (Cur).last_line = YYRHSLOC( Rhs, N ).last_line; \
137 (Cur).last_column = YYRHSLOC( Rhs, N ).last_column; \
138 (Cur).filename = YYRHSLOC( Rhs, 1 ).filename; \
139} else { \
140 (Cur).first_line = (Cur).last_line = YYRHSLOC( Rhs, 0 ).last_line; \
141 (Cur).first_column = (Cur).last_column = YYRHSLOC( Rhs, 0 ).last_column; \
142 (Cur).filename = YYRHSLOC( Rhs, 0 ).filename; \
143}
144%}
145
146%define parse.error verbose
147
148// Types declaration for productions
149%union
150{
151 Token tok;
152 ParseNode * pn;
153 ExpressionNode * en;
154 DeclarationNode * decl;
155 DeclarationNode::Aggregate aggKey;
156 DeclarationNode::TypeClass tclass;
157 StatementNode * sn;
158 WaitForStmt * wfs;
159 Expression * constant;
160 IfCtl * ifctl;
161 ForCtl * fctl;
162 LabelNode * label;
163 InitializerNode * in;
164 OperKinds op;
165 std::string * str;
166 bool flag;
167 CatchStmt::Kind catch_kind;
168}
169
170//************************* TERMINAL TOKENS ********************************
171
172// keywords
173%token TYPEDEF
174%token EXTERN STATIC AUTO REGISTER
175%token THREADLOCAL // C11
176%token INLINE FORTRAN // C99, extension ISO/IEC 9899:1999 Section J.5.9(1)
177%token NORETURN // C11
178%token CONST VOLATILE
179%token RESTRICT // C99
180%token ATOMIC // C11
181%token FORALL MUTEX VIRTUAL // CFA
182%token VOID CHAR SHORT INT LONG FLOAT DOUBLE SIGNED UNSIGNED
183%token BOOL COMPLEX IMAGINARY // C99
184%token INT128 FLOAT80 FLOAT128 // GCC
185%token ZERO_T ONE_T // CFA
186%token VALIST // GCC
187%token TYPEOF LABEL // GCC
188%token ENUM STRUCT UNION
189%token EXCEPTION // CFA
190%token COROUTINE MONITOR THREAD // CFA
191%token OTYPE FTYPE DTYPE TTYPE TRAIT // CFA
192%token SIZEOF OFFSETOF
193%token ATTRIBUTE EXTENSION // GCC
194%token IF ELSE SWITCH CASE DEFAULT DO WHILE FOR BREAK CONTINUE GOTO RETURN
195%token CHOOSE DISABLE ENABLE FALLTHRU FALLTHROUGH TRY CATCH CATCHRESUME FINALLY THROW THROWRESUME AT WITH WHEN WAITFOR // CFA
196%token ASM // C99, extension ISO/IEC 9899:1999 Section J.5.10(1)
197%token ALIGNAS ALIGNOF GENERIC STATICASSERT // C11
198
199// names and constants: lexer differentiates between identifier and typedef names
200%token<tok> IDENTIFIER QUOTED_IDENTIFIER TYPEDEFname TYPEGENname
201%token<tok> TIMEOUT WOR
202%token<tok> ATTR_IDENTIFIER ATTR_TYPEDEFname ATTR_TYPEGENname
203%token<tok> INTEGERconstant CHARACTERconstant STRINGliteral
204// Floating point constant is broken into three kinds of tokens because of the ambiguity with tuple indexing and
205// overloading constants 0/1, e.g., x.1 is lexed as (x)(.1), where (.1) is a factional constant, but is semantically
206// converted into the tuple index (.)(1). e.g., 3.x
207%token<tok> FLOATING_DECIMALconstant FLOATING_FRACTIONconstant FLOATINGconstant
208
209// multi-character operators
210%token ARROW // ->
211%token ICR DECR // ++ --
212%token LS RS // << >>
213%token LE GE EQ NE // <= >= == !=
214%token ANDAND OROR // && ||
215%token ELLIPSIS // ...
216
217%token EXPassign MULTassign DIVassign MODassign // \= *= /= %=
218%token PLUSassign MINUSassign // += -=
219%token LSassign RSassign // <<= >>=
220%token ANDassign ERassign ORassign // &= ^= |=
221
222%token ATassign // @=
223
224%type<tok> identifier no_attr_identifier
225%type<tok> identifier_or_type_name no_attr_identifier_or_type_name attr_name
226%type<tok> quasi_keyword
227%type<constant> string_literal
228%type<str> string_literal_list
229
230// expressions
231%type<en> constant
232%type<en> tuple tuple_expression_list
233%type<op> ptrref_operator unary_operator assignment_operator
234%type<en> primary_expression postfix_expression unary_expression
235%type<en> cast_expression exponential_expression multiplicative_expression additive_expression
236%type<en> shift_expression relational_expression equality_expression
237%type<en> AND_expression exclusive_OR_expression inclusive_OR_expression
238%type<en> logical_AND_expression logical_OR_expression
239%type<en> conditional_expression constant_expression assignment_expression assignment_expression_opt
240%type<en> comma_expression comma_expression_opt
241%type<en> argument_expression_list argument_expression default_initialize_opt
242%type<ifctl> if_control_expression
243%type<fctl> for_control_expression
244%type<en> subrange
245%type<decl> asm_name_opt
246%type<en> asm_operands_opt asm_operands_list asm_operand
247%type<label> label_list
248%type<en> asm_clobbers_list_opt
249%type<flag> asm_volatile_opt
250%type<en> handler_predicate_opt
251
252// statements
253%type<sn> statement labeled_statement compound_statement
254%type<sn> statement_decl statement_decl_list statement_list_nodecl
255%type<sn> selection_statement
256%type<sn> switch_clause_list_opt switch_clause_list
257%type<en> case_value
258%type<sn> case_clause case_value_list case_label case_label_list
259%type<sn> iteration_statement jump_statement
260%type<sn> expression_statement asm_statement
261%type<sn> with_statement
262%type<en> with_clause_opt
263%type<sn> exception_statement handler_clause finally_clause
264%type<catch_kind> handler_key
265%type<sn> mutex_statement
266%type<en> when_clause when_clause_opt waitfor timeout
267%type<sn> waitfor_statement
268%type<wfs> waitfor_clause
269
270// declarations
271%type<decl> abstract_declarator abstract_ptr abstract_array abstract_function array_dimension multi_array_dimension
272%type<decl> abstract_parameter_declarator abstract_parameter_ptr abstract_parameter_array abstract_parameter_function array_parameter_dimension array_parameter_1st_dimension
273%type<decl> abstract_parameter_declaration
274
275%type<aggKey> aggregate_key
276%type<decl> aggregate_type aggregate_type_nobody
277
278%type<decl> assertion assertion_list_opt
279
280%type<en> bit_subrange_size_opt bit_subrange_size
281
282%type<decl> basic_declaration_specifier basic_type_name basic_type_specifier direct_type indirect_type
283
284%type<decl> trait_declaration trait_declaration_list trait_declaring_list trait_specifier
285
286%type<decl> declaration declaration_list declaration_list_opt declaration_qualifier_list
287%type<decl> declaration_specifier declaration_specifier_nobody declarator declaring_list
288
289%type<decl> elaborated_type elaborated_type_nobody
290
291%type<decl> enumerator_list enum_type enum_type_nobody
292%type<en> enumerator_value_opt
293
294%type<decl> exception_declaration external_definition external_definition_list external_definition_list_opt
295
296%type<decl> field_declaration field_declaration_list field_declarator field_declaring_list
297%type<en> field field_list field_name fraction_constants
298
299%type<decl> external_function_definition function_definition function_array function_declarator function_no_ptr function_ptr
300
301%type<decl> identifier_parameter_declarator identifier_parameter_ptr identifier_parameter_array identifier_parameter_function
302%type<decl> identifier_list
303
304%type<decl> cfa_abstract_array cfa_abstract_declarator_no_tuple cfa_abstract_declarator_tuple
305%type<decl> cfa_abstract_function cfa_abstract_parameter_declaration cfa_abstract_parameter_list
306%type<decl> cfa_abstract_ptr cfa_abstract_tuple
307
308%type<decl> cfa_array_parameter_1st_dimension
309
310%type<decl> cfa_trait_declaring_list cfa_declaration cfa_field_declaring_list
311%type<decl> cfa_function_declaration cfa_function_return cfa_function_specifier
312
313%type<decl> cfa_identifier_parameter_array cfa_identifier_parameter_declarator_no_tuple
314%type<decl> cfa_identifier_parameter_declarator_tuple cfa_identifier_parameter_ptr
315
316%type<decl> cfa_parameter_declaration cfa_parameter_list cfa_parameter_type_list_opt
317
318%type<decl> cfa_typedef_declaration cfa_variable_declaration cfa_variable_specifier
319
320%type<decl> c_declaration static_assert
321%type<decl> KR_function_declarator KR_function_no_ptr KR_function_ptr KR_function_array
322%type<decl> KR_declaration_list KR_declaration_list_opt
323
324%type<decl> parameter_declaration parameter_list parameter_type_list_opt
325
326%type<decl> paren_identifier paren_type
327
328%type<decl> storage_class storage_class_list
329
330%type<decl> sue_declaration_specifier sue_declaration_specifier_nobody sue_type_specifier sue_type_specifier_nobody
331
332%type<tclass> type_class
333%type<decl> type_declarator type_declarator_name type_declaring_list
334
335%type<decl> type_declaration_specifier type_type_specifier type_name typegen_name
336%type<decl> typedef typedef_declaration typedef_expression
337
338%type<decl> variable_type_redeclarator type_ptr type_array type_function
339
340%type<decl> type_parameter_redeclarator type_parameter_ptr type_parameter_array type_parameter_function
341
342%type<decl> type type_no_function
343%type<decl> type_parameter type_parameter_list type_initializer_opt
344
345%type<en> type_list
346
347%type<decl> type_qualifier type_qualifier_name forall type_qualifier_list_opt type_qualifier_list
348%type<decl> type_specifier type_specifier_nobody
349
350%type<decl> variable_declarator variable_ptr variable_array variable_function
351%type<decl> variable_abstract_declarator variable_abstract_ptr variable_abstract_array variable_abstract_function
352
353%type<decl> attribute_list_opt attribute_list attribute_name_list attribute attribute_name
354
355// initializers
356%type<in> initializer initializer_list initializer_opt
357
358// designators
359%type<en> designator designator_list designation
360
361
362// Handle shift/reduce conflict for dangling else by shifting the ELSE token. For example, this string is ambiguous:
363// .---------. matches IF '(' comma_expression ')' statement . (reduce)
364// if ( C ) S1 else S2
365// `-----------------' matches IF '(' comma_expression ')' statement . (shift) ELSE statement */
366// Similar issues exit with the waitfor statement.
367
368// Order of these lines matters (low-to-high precedence). THEN is left associative over WOR/TIMEOUT/ELSE, WOR is left
369// associative over TIMEOUT/ELSE, and TIMEOUT is left associative over ELSE.
370%precedence THEN // rule precedence for IF/WAITFOR statement
371%precedence WOR // token precedence for start of WOR in WAITFOR statement
372%precedence TIMEOUT // token precedence for start of TIMEOUT in WAITFOR statement
373%precedence ELSE // token precedence for start of else clause in IF/WAITFOR statement
374
375// Handle shift/reduce conflict for generic type by shifting the '(' token. For example, this string is ambiguous:
376// forall( otype T ) struct Foo { T v; };
377// .-----. matches pointer to function returning a generic (which is impossible without a type)
378// Foo ( *fp )( int );
379// `---' matches start of TYPEGENname '('
380// Must be:
381// Foo( int ) ( *fp )( int );
382
383// Order of these lines matters (low-to-high precedence).
384%precedence TYPEGENname
385%precedence '('
386
387%locations // support location tracking for error messages
388
389%start translation_unit // parse-tree root
390
391%%
392//************************* Namespace Management ********************************
393
394// The grammar in the ANSI C standard is not strictly context-free, since it relies upon the distinct terminal symbols
395// "identifier", "TYPEDEFname", and "TYPEGENname" that are lexically identical. While it is possible to write a purely
396// context-free grammar, such a grammar would obscure the relationship between syntactic and semantic constructs.
397// Hence, this grammar uses the ANSI style.
398//
399// Cforall compounds this problem by introducing type names local to the scope of a declaration (for instance, those
400// introduced through "forall" qualifiers), and by introducing "type generators" -- parameterized types. This latter
401// type name creates a third class of identifiers that must be distinguished by the scanner.
402//
403// Since the scanner cannot distinguish among the different classes of identifiers without some context information, it
404// accesses a data structure (TypedefTable) to allow classification of an identifier that it has just read. Semantic
405// actions during the parser update this data structure when the class of identifiers change.
406//
407// Because the Cforall language is block-scoped, there is the possibility that an identifier can change its class in a
408// local scope; it must revert to its original class at the end of the block. Since type names can be local to a
409// particular declaration, each declaration is itself a scope. This requires distinguishing between type names that are
410// local to the current declaration scope and those that persist past the end of the declaration (i.e., names defined in
411// "typedef" or "otype" declarations).
412//
413// The non-terminals "push" and "pop" derive the empty string; their only use is to denote the opening and closing of
414// scopes. Every push must have a matching pop, although it is regrettable the matching pairs do not always occur
415// within the same rule. These non-terminals may appear in more contexts than strictly necessary from a semantic point
416// of view. Unfortunately, these extra rules are necessary to prevent parsing conflicts -- the parser may not have
417// enough context and look-ahead information to decide whether a new scope is necessary, so the effect of these extra
418// rules is to open a new scope unconditionally. As the grammar evolves, it may be neccesary to add or move around
419// "push" and "pop" nonterminals to resolve conflicts of this sort.
420
421push:
422 { typedefTable.enterScope(); }
423 ;
424
425pop:
426 { typedefTable.leaveScope(); }
427 ;
428
429//************************* CONSTANTS ********************************
430
431constant:
432 // ENUMERATIONconstant is not included here; it is treated as a variable with type "enumeration constant".
433 INTEGERconstant { $$ = new ExpressionNode( build_constantInteger( *$1 ) ); }
434 | FLOATING_DECIMALconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); }
435 | FLOATING_FRACTIONconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); }
436 | FLOATINGconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); }
437 | CHARACTERconstant { $$ = new ExpressionNode( build_constantChar( *$1 ) ); }
438 ;
439
440quasi_keyword: // CFA
441 TIMEOUT
442 | WOR
443 ;
444
445identifier:
446 IDENTIFIER
447 | ATTR_IDENTIFIER // CFA
448 | quasi_keyword
449 ;
450
451no_attr_identifier:
452 IDENTIFIER
453 | quasi_keyword
454 ;
455
456string_literal:
457 string_literal_list { $$ = build_constantStr( *$1 ); }
458 ;
459
460string_literal_list: // juxtaposed strings are concatenated
461 STRINGliteral { $$ = $1; } // conversion from tok to str
462 | string_literal_list STRINGliteral
463 {
464 if ( ! appendStr( *$1, *$2 ) ) YYERROR; // append 2nd juxtaposed string to 1st
465 delete $2; // allocated by lexer
466 $$ = $1; // conversion from tok to str
467 }
468 ;
469
470//************************* EXPRESSIONS ********************************
471
472primary_expression:
473 IDENTIFIER // typedef name cannot be used as a variable name
474 { $$ = new ExpressionNode( build_varref( $1 ) ); }
475 | quasi_keyword
476 { $$ = new ExpressionNode( build_varref( $1 ) ); }
477 | tuple
478 | '(' comma_expression ')'
479 { $$ = $2; }
480 | '(' compound_statement ')' // GCC, lambda expression
481 { $$ = new ExpressionNode( new StmtExpr( dynamic_cast< CompoundStmt * >(maybeMoveBuild< Statement >($2) ) ) ); }
482 | type_name '.' no_attr_identifier // CFA, nested type
483 { SemanticError( yylloc, "Qualified names are currently unimplemented." ); $$ = nullptr; } // FIX ME
484 | type_name '.' '[' push field_list pop ']' // CFA, nested type / tuple field selector
485 { SemanticError( yylloc, "Qualified names are currently unimplemented." ); $$ = nullptr; } // FIX ME
486 | GENERIC '(' assignment_expression ',' generic_assoc_list ')' // C11
487 { SemanticError( yylloc, "_Generic is currently unimplemented." ); $$ = nullptr; } // FIX ME
488 ;
489
490generic_assoc_list: // C11
491 | generic_association
492 | generic_assoc_list ',' generic_association
493 ;
494
495generic_association: // C11
496 type_no_function ':' assignment_expression
497 | DEFAULT ':' assignment_expression
498 ;
499
500postfix_expression:
501 primary_expression
502 | postfix_expression '[' push assignment_expression pop ']'
503 // CFA, comma_expression disallowed in this context because it results in a common user error: subscripting a
504 // matrix with x[i,j] instead of x[i][j]. While this change is not backwards compatible, there seems to be
505 // little advantage to this feature and many disadvantages. It is possible to write x[(i,j)] in CFA, which is
506 // equivalent to the old x[i,j].
507 { $$ = new ExpressionNode( build_binary_val( OperKinds::Index, $1, $4 ) ); }
508 | postfix_expression '{' argument_expression_list '}' // CFA, constructor call
509 {
510 Token fn;
511 fn.str = new std::string( "?{}" ); // location undefined - use location of '{'?
512 $$ = new ExpressionNode( new ConstructorExpr( build_func( new ExpressionNode( build_varref( fn ) ), (ExpressionNode *)( $1 )->set_last( $3 ) ) ) );
513 }
514 | postfix_expression '(' argument_expression_list ')'
515 { $$ = new ExpressionNode( build_func( $1, $3 ) ); }
516 | postfix_expression '.' no_attr_identifier
517 { $$ = new ExpressionNode( build_fieldSel( $1, build_varref( $3 ) ) ); }
518 | postfix_expression '.' '[' push field_list pop ']' // CFA, tuple field selector
519 { $$ = new ExpressionNode( build_fieldSel( $1, build_tuple( $5 ) ) ); }
520 | postfix_expression FLOATING_FRACTIONconstant // CFA, tuple index
521 { $$ = new ExpressionNode( build_fieldSel( $1, build_field_name_FLOATING_FRACTIONconstant( *$2 ) ) ); }
522 | postfix_expression ARROW no_attr_identifier
523 {
524 $$ = new ExpressionNode( build_pfieldSel( $1, *$3 == "0" || *$3 == "1" ? build_constantInteger( *$3 ) : build_varref( $3 ) ) );
525 }
526 | postfix_expression ARROW '[' push field_list pop ']' // CFA, tuple field selector
527 { $$ = new ExpressionNode( build_pfieldSel( $1, build_tuple( $5 ) ) ); }
528 | postfix_expression ARROW INTEGERconstant // CFA, tuple index
529 { $$ = new ExpressionNode( build_pfieldSel( $1, build_constantInteger( *$3 ) ) ); }
530 | postfix_expression ICR
531 { $$ = new ExpressionNode( build_unary_ptr( OperKinds::IncrPost, $1 ) ); }
532 | postfix_expression DECR
533 { $$ = new ExpressionNode( build_unary_ptr( OperKinds::DecrPost, $1 ) ); }
534 | '(' type_no_function ')' '{' initializer_list comma_opt '}' // C99, compound-literal
535 { $$ = new ExpressionNode( build_compoundLiteral( $2, new InitializerNode( $5, true ) ) ); }
536 | '(' type_no_function ')' '@' '{' initializer_list comma_opt '}' // CFA, explicit C compound-literal
537 { $$ = new ExpressionNode( build_compoundLiteral( $2, (new InitializerNode( $6, true ))->set_maybeConstructed( false ) ) ); }
538 | '^' primary_expression '{' argument_expression_list '}' // CFA
539 {
540 Token fn;
541 fn.str = new string( "^?{}" ); // location undefined
542 $$ = new ExpressionNode( build_func( new ExpressionNode( build_varref( fn ) ), (ExpressionNode *)( $2 )->set_last( $4 ) ) );
543 }
544 ;
545
546argument_expression_list:
547 argument_expression
548 | argument_expression_list ',' argument_expression
549 { $$ = (ExpressionNode *)( $1->set_last( $3 )); }
550 ;
551
552argument_expression:
553 // empty
554 { $$ = nullptr; }
555 // | '@' // use default argument
556 // { $$ = new ExpressionNode( build_constantInteger( *new string( "2" ) ) ); }
557 | assignment_expression
558 ;
559
560field_list: // CFA, tuple field selector
561 field
562 | field_list ',' field { $$ = (ExpressionNode *)$1->set_last( $3 ); }
563 ;
564
565field: // CFA, tuple field selector
566 field_name
567 | FLOATING_DECIMALconstant field
568 { $$ = new ExpressionNode( build_fieldSel( new ExpressionNode( build_field_name_FLOATING_DECIMALconstant( *$1 ) ), maybeMoveBuild<Expression>( $2 ) ) ); }
569 | FLOATING_DECIMALconstant '[' push field_list pop ']'
570 { $$ = new ExpressionNode( build_fieldSel( new ExpressionNode( build_field_name_FLOATING_DECIMALconstant( *$1 ) ), build_tuple( $4 ) ) ); }
571 | field_name '.' field
572 { $$ = new ExpressionNode( build_fieldSel( $1, maybeMoveBuild<Expression>( $3 ) ) ); }
573 | field_name '.' '[' push field_list pop ']'
574 { $$ = new ExpressionNode( build_fieldSel( $1, build_tuple( $5 ) ) ); }
575 | field_name ARROW field
576 { $$ = new ExpressionNode( build_pfieldSel( $1, maybeMoveBuild<Expression>( $3 ) ) ); }
577 | field_name ARROW '[' push field_list pop ']'
578 { $$ = new ExpressionNode( build_pfieldSel( $1, build_tuple( $5 ) ) ); }
579 ;
580
581field_name:
582 INTEGERconstant fraction_constants
583 { $$ = new ExpressionNode( build_field_name_fraction_constants( build_constantInteger( *$1 ), $2 ) ); }
584 | FLOATINGconstant fraction_constants
585 { $$ = new ExpressionNode( build_field_name_fraction_constants( build_field_name_FLOATINGconstant( *$1 ), $2 ) ); }
586 | no_attr_identifier fraction_constants
587 {
588 $$ = new ExpressionNode( build_field_name_fraction_constants( build_varref( $1 ), $2 ) );
589 }
590 ;
591
592fraction_constants:
593 // empty
594 { $$ = nullptr; }
595 | fraction_constants FLOATING_FRACTIONconstant
596 {
597 Expression * constant = build_field_name_FLOATING_FRACTIONconstant( *$2 );
598 $$ = $1 != nullptr ? new ExpressionNode( build_fieldSel( $1, constant ) ) : new ExpressionNode( constant );
599 }
600 ;
601
602unary_expression:
603 postfix_expression
604 // first location where constant/string can have operator applied: sizeof 3/sizeof "abc" still requires
605 // semantics checks, e.g., ++3, 3--, *3, &&3
606 | constant
607 { $$ = $1; }
608 | string_literal
609 { $$ = new ExpressionNode( $1 ); }
610 | EXTENSION cast_expression // GCC
611 { $$ = $2->set_extension( true ); }
612 // '*' ('&') is separated from unary_operator because of shift/reduce conflict in:
613 // { * X; } // dereference X
614 // { * int X; } // CFA declaration of pointer to int
615 | ptrref_operator cast_expression // CFA
616 {
617 switch ( $1 ) {
618 case OperKinds::AddressOf:
619 $$ = new ExpressionNode( new AddressExpr( maybeMoveBuild< Expression >( $2 ) ) );
620 break;
621 case OperKinds::PointTo:
622 $$ = new ExpressionNode( build_unary_val( $1, $2 ) );
623 break;
624 case OperKinds::And:
625 $$ = new ExpressionNode( new AddressExpr( new AddressExpr( maybeMoveBuild< Expression >( $2 ) ) ) );
626 break;
627 default:
628 assert( false );
629 }
630 }
631 | unary_operator cast_expression
632 { $$ = new ExpressionNode( build_unary_val( $1, $2 ) ); }
633 | ICR unary_expression
634 { $$ = new ExpressionNode( build_unary_ptr( OperKinds::Incr, $2 ) ); }
635 | DECR unary_expression
636 { $$ = new ExpressionNode( build_unary_ptr( OperKinds::Decr, $2 ) ); }
637 | SIZEOF unary_expression
638 { $$ = new ExpressionNode( new SizeofExpr( maybeMoveBuild< Expression >( $2 ) ) ); }
639 | SIZEOF '(' type_no_function ')'
640 { $$ = new ExpressionNode( new SizeofExpr( maybeMoveBuildType( $3 ) ) ); }
641 | ALIGNOF unary_expression // GCC, variable alignment
642 { $$ = new ExpressionNode( new AlignofExpr( maybeMoveBuild< Expression >( $2 ) ) ); }
643 | ALIGNOF '(' type_no_function ')' // GCC, type alignment
644 { $$ = new ExpressionNode( new AlignofExpr( maybeMoveBuildType( $3 ) ) ); }
645 | OFFSETOF '(' type_no_function ',' no_attr_identifier ')'
646 { $$ = new ExpressionNode( build_offsetOf( $3, build_varref( $5 ) ) ); }
647 | ATTR_IDENTIFIER
648 { $$ = new ExpressionNode( new AttrExpr( build_varref( $1 ), maybeMoveBuild< Expression >( (ExpressionNode *)nullptr ) ) ); }
649 | ATTR_IDENTIFIER '(' argument_expression ')'
650 { $$ = new ExpressionNode( new AttrExpr( build_varref( $1 ), maybeMoveBuild< Expression >( $3 ) ) ); }
651 | ATTR_IDENTIFIER '(' type ')'
652 { $$ = new ExpressionNode( new AttrExpr( build_varref( $1 ), maybeMoveBuildType( $3 ) ) ); }
653 ;
654
655ptrref_operator:
656 '*' { $$ = OperKinds::PointTo; }
657 | '&' { $$ = OperKinds::AddressOf; }
658 // GCC, address of label must be handled by semantic check for ref,ref,label
659 | ANDAND { $$ = OperKinds::And; }
660 ;
661
662unary_operator:
663 '+' { $$ = OperKinds::UnPlus; }
664 | '-' { $$ = OperKinds::UnMinus; }
665 | '!' { $$ = OperKinds::Neg; }
666 | '~' { $$ = OperKinds::BitNeg; }
667 ;
668
669cast_expression:
670 unary_expression
671 | '(' type_no_function ')' cast_expression
672 { $$ = new ExpressionNode( build_cast( $2, $4 ) ); }
673 // VIRTUAL cannot be opt because of look ahead issues
674 | '(' VIRTUAL ')' cast_expression
675 { $$ = new ExpressionNode( new VirtualCastExpr( maybeMoveBuild< Expression >( $4 ), maybeMoveBuildType( nullptr ) ) ); }
676 | '(' VIRTUAL type_no_function ')' cast_expression
677 { $$ = new ExpressionNode( new VirtualCastExpr( maybeMoveBuild< Expression >( $5 ), maybeMoveBuildType( $3 ) ) ); }
678// | '(' type_no_function ')' tuple
679// { $$ = new ExpressionNode( build_cast( $2, $4 ) ); }
680 ;
681
682exponential_expression:
683 cast_expression
684 | exponential_expression '\\' cast_expression
685 { $$ = new ExpressionNode( build_binary_val( OperKinds::Exp, $1, $3 ) ); }
686 ;
687
688multiplicative_expression:
689 exponential_expression
690 | multiplicative_expression '*' exponential_expression
691 { $$ = new ExpressionNode( build_binary_val( OperKinds::Mul, $1, $3 ) ); }
692 | multiplicative_expression '/' exponential_expression
693 { $$ = new ExpressionNode( build_binary_val( OperKinds::Div, $1, $3 ) ); }
694 | multiplicative_expression '%' exponential_expression
695 { $$ = new ExpressionNode( build_binary_val( OperKinds::Mod, $1, $3 ) ); }
696 ;
697
698additive_expression:
699 multiplicative_expression
700 | additive_expression '+' multiplicative_expression
701 { $$ = new ExpressionNode( build_binary_val( OperKinds::Plus, $1, $3 ) ); }
702 | additive_expression '-' multiplicative_expression
703 { $$ = new ExpressionNode( build_binary_val( OperKinds::Minus, $1, $3 ) ); }
704 ;
705
706shift_expression:
707 additive_expression
708 | shift_expression LS additive_expression
709 { $$ = new ExpressionNode( build_binary_val( OperKinds::LShift, $1, $3 ) ); }
710 | shift_expression RS additive_expression
711 { $$ = new ExpressionNode( build_binary_val( OperKinds::RShift, $1, $3 ) ); }
712 ;
713
714relational_expression:
715 shift_expression
716 | relational_expression '<' shift_expression
717 { $$ = new ExpressionNode( build_binary_val( OperKinds::LThan, $1, $3 ) ); }
718 | relational_expression '>' shift_expression
719 { $$ = new ExpressionNode( build_binary_val( OperKinds::GThan, $1, $3 ) ); }
720 | relational_expression LE shift_expression
721 { $$ = new ExpressionNode( build_binary_val( OperKinds::LEThan, $1, $3 ) ); }
722 | relational_expression GE shift_expression
723 { $$ = new ExpressionNode( build_binary_val( OperKinds::GEThan, $1, $3 ) ); }
724 ;
725
726equality_expression:
727 relational_expression
728 | equality_expression EQ relational_expression
729 { $$ = new ExpressionNode( build_binary_val( OperKinds::Eq, $1, $3 ) ); }
730 | equality_expression NE relational_expression
731 { $$ = new ExpressionNode( build_binary_val( OperKinds::Neq, $1, $3 ) ); }
732 ;
733
734AND_expression:
735 equality_expression
736 | AND_expression '&' equality_expression
737 { $$ = new ExpressionNode( build_binary_val( OperKinds::BitAnd, $1, $3 ) ); }
738 ;
739
740exclusive_OR_expression:
741 AND_expression
742 | exclusive_OR_expression '^' AND_expression
743 { $$ = new ExpressionNode( build_binary_val( OperKinds::Xor, $1, $3 ) ); }
744 ;
745
746inclusive_OR_expression:
747 exclusive_OR_expression
748 | inclusive_OR_expression '|' exclusive_OR_expression
749 { $$ = new ExpressionNode( build_binary_val( OperKinds::BitOr, $1, $3 ) ); }
750 ;
751
752logical_AND_expression:
753 inclusive_OR_expression
754 | logical_AND_expression ANDAND inclusive_OR_expression
755 { $$ = new ExpressionNode( build_and_or( $1, $3, true ) ); }
756 ;
757
758logical_OR_expression:
759 logical_AND_expression
760 | logical_OR_expression OROR logical_AND_expression
761 { $$ = new ExpressionNode( build_and_or( $1, $3, false ) ); }
762 ;
763
764conditional_expression:
765 logical_OR_expression
766 | logical_OR_expression '?' comma_expression ':' conditional_expression
767 { $$ = new ExpressionNode( build_cond( $1, $3, $5 ) ); }
768 // FIX ME: this hack computes $1 twice
769 | logical_OR_expression '?' /* empty */ ':' conditional_expression // GCC, omitted first operand
770 { $$ = new ExpressionNode( build_cond( $1, $1, $4 ) ); }
771 ;
772
773constant_expression:
774 conditional_expression
775 ;
776
777assignment_expression:
778 // CFA, assignment is separated from assignment_operator to ensure no assignment operations for tuples
779 conditional_expression
780 | unary_expression assignment_operator assignment_expression
781 { $$ = new ExpressionNode( build_binary_val( $2, $1, $3 ) ); }
782 | unary_expression '=' '{' initializer_list comma_opt '}'
783 { SemanticError( yylloc, "Initializer assignment is currently unimplemented." ); $$ = nullptr; } // FIX ME
784 ;
785
786assignment_expression_opt:
787 // empty
788 { $$ = nullptr; }
789 | assignment_expression
790 ;
791
792assignment_operator:
793 '=' { $$ = OperKinds::Assign; }
794 | ATassign { $$ = OperKinds::AtAssn; }
795 | EXPassign { $$ = OperKinds::ExpAssn; }
796 | MULTassign { $$ = OperKinds::MulAssn; }
797 | DIVassign { $$ = OperKinds::DivAssn; }
798 | MODassign { $$ = OperKinds::ModAssn; }
799 | PLUSassign { $$ = OperKinds::PlusAssn; }
800 | MINUSassign { $$ = OperKinds::MinusAssn; }
801 | LSassign { $$ = OperKinds::LSAssn; }
802 | RSassign { $$ = OperKinds::RSAssn; }
803 | ANDassign { $$ = OperKinds::AndAssn; }
804 | ERassign { $$ = OperKinds::ERAssn; }
805 | ORassign { $$ = OperKinds::OrAssn; }
806 ;
807
808tuple: // CFA, tuple
809 // CFA, one assignment_expression is factored out of comma_expression to eliminate a shift/reduce conflict with
810 // comma_expression in cfa_identifier_parameter_array and cfa_abstract_array
811// '[' ']'
812// { $$ = new ExpressionNode( build_tuple() ); }
813// '[' push assignment_expression pop ']'
814// { $$ = new ExpressionNode( build_tuple( $3 ) ); }
815 '[' push ',' tuple_expression_list pop ']'
816 { $$ = new ExpressionNode( build_tuple( (ExpressionNode *)(new ExpressionNode( nullptr ) )->set_last( $4 ) ) ); }
817 | '[' push assignment_expression ',' tuple_expression_list pop ']'
818 { $$ = new ExpressionNode( build_tuple( (ExpressionNode *)$3->set_last( $5 ) ) ); }
819 ;
820
821tuple_expression_list:
822 assignment_expression_opt
823 | tuple_expression_list ',' assignment_expression_opt
824 { $$ = (ExpressionNode *)$1->set_last( $3 ); }
825 ;
826
827comma_expression:
828 assignment_expression
829 | comma_expression ',' assignment_expression
830 { $$ = new ExpressionNode( new CommaExpr( maybeMoveBuild< Expression >( $1 ), maybeMoveBuild< Expression >( $3 ) ) ); }
831 ;
832
833comma_expression_opt:
834 // empty
835 { $$ = nullptr; }
836 | comma_expression
837 ;
838
839//*************************** STATEMENTS *******************************
840
841statement:
842 labeled_statement
843 | compound_statement
844 | expression_statement { $$ = $1; }
845 | selection_statement
846 | iteration_statement
847 | jump_statement
848 | with_statement
849 | mutex_statement
850 | waitfor_statement
851 | exception_statement
852 | enable_disable_statement
853 { SemanticError( yylloc, "enable/disable statement is currently unimplemented." ); $$ = nullptr; } // FIX ME
854 | asm_statement
855 ;
856
857labeled_statement:
858 // labels cannot be identifiers 0 or 1 or ATTR_IDENTIFIER
859 identifier_or_type_name ':' attribute_list_opt statement
860 {
861 $$ = $4->add_label( $1, $3 );
862 }
863 ;
864
865compound_statement:
866 '{' '}'
867 { $$ = new StatementNode( build_compound( (StatementNode *)0 ) ); }
868 | '{'
869 // Two scopes are necessary because the block itself has a scope, but every declaration within the block also
870 // requires its own scope.
871 push push
872 local_label_declaration_opt // GCC, local labels
873 statement_decl_list // C99, intermix declarations and statements
874 pop '}'
875 { $$ = new StatementNode( build_compound( $5 ) ); }
876 ;
877
878statement_decl_list: // C99
879 statement_decl
880 | statement_decl_list push statement_decl
881 { if ( $1 != 0 ) { $1->set_last( $3 ); $$ = $1; } }
882 ;
883
884statement_decl:
885 declaration // CFA, new & old style declarations
886 { $$ = new StatementNode( $1 ); }
887 | EXTENSION declaration // GCC
888 {
889 distExt( $2 );
890 $$ = new StatementNode( $2 );
891 }
892 | function_definition
893 { $$ = new StatementNode( $1 ); }
894 | EXTENSION function_definition // GCC
895 {
896 distExt( $2 );
897 $$ = new StatementNode( $2 );
898 }
899 | statement pop
900 ;
901
902statement_list_nodecl:
903 statement
904 | statement_list_nodecl statement
905 { if ( $1 != 0 ) { $1->set_last( $2 ); $$ = $1; } }
906 ;
907
908expression_statement:
909 comma_expression_opt ';'
910 { $$ = new StatementNode( build_expr( $1 ) ); }
911 ;
912
913selection_statement:
914 IF '(' push if_control_expression ')' statement %prec THEN
915 // explicitly deal with the shift/reduce conflict on if/else
916 { $$ = new StatementNode( build_if( $4, $6, nullptr ) ); }
917 | IF '(' push if_control_expression ')' statement ELSE statement
918 { $$ = new StatementNode( build_if( $4, $6, $8 ) ); }
919 | SWITCH '(' comma_expression ')' case_clause
920 { $$ = new StatementNode( build_switch( true, $3, $5 ) ); }
921 | SWITCH '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt '}' // CFA
922 {
923 StatementNode *sw = new StatementNode( build_switch( true, $3, $8 ) );
924 // The semantics of the declaration list is changed to include associated initialization, which is performed
925 // *before* the transfer to the appropriate case clause by hoisting the declarations into a compound
926 // statement around the switch. Statements after the initial declaration list can never be executed, and
927 // therefore, are removed from the grammar even though C allows it. The change also applies to choose
928 // statement.
929 $$ = $7 ? new StatementNode( build_compound( (StatementNode *)((new StatementNode( $7 ))->set_last( sw )) ) ) : sw;
930 }
931 | CHOOSE '(' comma_expression ')' case_clause // CFA
932 { $$ = new StatementNode( build_switch( false, $3, $5 ) ); }
933 | CHOOSE '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt '}' // CFA
934 {
935 StatementNode *sw = new StatementNode( build_switch( false, $3, $8 ) );
936 $$ = $7 ? new StatementNode( build_compound( (StatementNode *)((new StatementNode( $7 ))->set_last( sw )) ) ) : sw;
937 }
938 ;
939
940if_control_expression:
941 comma_expression pop
942 { $$ = new IfCtl( nullptr, $1 ); }
943 | c_declaration pop // no semi-colon
944 { $$ = new IfCtl( $1, nullptr ); }
945 | cfa_declaration pop // no semi-colon
946 { $$ = new IfCtl( $1, nullptr ); }
947 | declaration comma_expression // semi-colon separated
948 { $$ = new IfCtl( $1, $2 ); }
949 ;
950
951// CASE and DEFAULT clauses are only allowed in the SWITCH statement, precluding Duff's device. In addition, a case
952// clause allows a list of values and subranges.
953
954case_value: // CFA
955 constant_expression { $$ = $1; }
956 | constant_expression ELLIPSIS constant_expression // GCC, subrange
957 { $$ = new ExpressionNode( new RangeExpr( maybeMoveBuild< Expression >( $1 ), maybeMoveBuild< Expression >( $3 ) ) ); }
958 | subrange // CFA, subrange
959 ;
960
961case_value_list: // CFA
962 case_value { $$ = new StatementNode( build_case( $1 ) ); }
963 // convert case list, e.g., "case 1, 3, 5:" into "case 1: case 3: case 5"
964 | case_value_list ',' case_value { $$ = (StatementNode *)($1->set_last( new StatementNode( build_case( $3 ) ) ) ); }
965 ;
966
967case_label: // CFA
968 CASE case_value_list ':' { $$ = $2; }
969 | DEFAULT ':' { $$ = new StatementNode( build_default() ); }
970 // A semantic check is required to ensure only one default clause per switch/choose statement.
971 ;
972
973//label_list_opt:
974// // empty
975// | identifier_or_type_name ':'
976// | label_list_opt identifier_or_type_name ':'
977// ;
978
979case_label_list: // CFA
980 case_label
981 | case_label_list case_label { $$ = (StatementNode *)( $1->set_last( $2 )); }
982 ;
983
984case_clause: // CFA
985 case_label_list statement { $$ = $1->append_last_case( new StatementNode( build_compound( $2 ) ) ); }
986 ;
987
988switch_clause_list_opt: // CFA
989 // empty
990 { $$ = nullptr; }
991 | switch_clause_list
992 ;
993
994switch_clause_list: // CFA
995 case_label_list statement_list_nodecl
996 { $$ = $1->append_last_case( new StatementNode( build_compound( $2 ) ) ); }
997 | switch_clause_list case_label_list statement_list_nodecl
998 { $$ = (StatementNode *)( $1->set_last( $2->append_last_case( new StatementNode( build_compound( $3 ) ) ) ) ); }
999 ;
1000
1001iteration_statement:
1002 WHILE '(' comma_expression ')' statement
1003 { $$ = new StatementNode( build_while( $3, $5 ) ); }
1004 | DO statement WHILE '(' comma_expression ')' ';'
1005 { $$ = new StatementNode( build_while( $5, $2, true ) ); }
1006 | FOR '(' push for_control_expression ')' statement
1007 { $$ = new StatementNode( build_for( $4, $6 ) ); }
1008 ;
1009
1010for_control_expression:
1011 comma_expression_opt pop ';' comma_expression_opt ';' comma_expression_opt
1012 { $$ = new ForCtl( $1, $4, $6 ); }
1013 | declaration comma_expression_opt ';' comma_expression_opt // C99
1014 { $$ = new ForCtl( $1, $2, $4 ); }
1015 ;
1016
1017jump_statement:
1018 GOTO identifier_or_type_name ';'
1019 { $$ = new StatementNode( build_branch( $2, BranchStmt::Goto ) ); }
1020 | GOTO '*' comma_expression ';' // GCC, computed goto
1021 // The syntax for the GCC computed goto violates normal expression precedence, e.g., goto *i+3; => goto *(i+3);
1022 // whereas normal operator precedence yields goto (*i)+3;
1023 { $$ = new StatementNode( build_computedgoto( $3 ) ); }
1024 // A semantic check is required to ensure fallthru appears only in the body of a choose statement.
1025 | fall_through_name ';' // CFA
1026 { $$ = new StatementNode( build_branch( BranchStmt::FallThrough ) ); }
1027 | fall_through_name identifier_or_type_name ';' // CFA
1028 { $$ = new StatementNode( build_branch( $2, BranchStmt::FallThrough ) ); }
1029 | fall_through_name DEFAULT ';' // CFA
1030 { $$ = new StatementNode( build_branch( BranchStmt::FallThroughDefault ) ); }
1031 | CONTINUE ';'
1032 // A semantic check is required to ensure this statement appears only in the body of an iteration statement.
1033 { $$ = new StatementNode( build_branch( BranchStmt::Continue ) ); }
1034 | CONTINUE identifier_or_type_name ';' // CFA, multi-level continue
1035 // A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
1036 // the target of the transfer appears only at the start of an iteration statement.
1037 { $$ = new StatementNode( build_branch( $2, BranchStmt::Continue ) ); }
1038 | BREAK ';'
1039 // A semantic check is required to ensure this statement appears only in the body of an iteration statement.
1040 { $$ = new StatementNode( build_branch( BranchStmt::Break ) ); }
1041 | BREAK identifier_or_type_name ';' // CFA, multi-level exit
1042 // A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
1043 // the target of the transfer appears only at the start of an iteration statement.
1044 { $$ = new StatementNode( build_branch( $2, BranchStmt::Break ) ); }
1045 | RETURN comma_expression_opt ';'
1046 { $$ = new StatementNode( build_return( $2 ) ); }
1047 | RETURN '{' initializer_list comma_opt '}'
1048 { SemanticError( yylloc, "Initializer return is currently unimplemented." ); $$ = nullptr; } // FIX ME
1049 | THROW assignment_expression_opt ';' // handles rethrow
1050 { $$ = new StatementNode( build_throw( $2 ) ); }
1051 | THROWRESUME assignment_expression_opt ';' // handles reresume
1052 { $$ = new StatementNode( build_resume( $2 ) ); }
1053 | THROWRESUME assignment_expression_opt AT assignment_expression ';' // handles reresume
1054 { $$ = new StatementNode( build_resume_at( $2, $4 ) ); }
1055 ;
1056
1057fall_through_name: // CFA
1058 FALLTHRU
1059 | FALLTHROUGH
1060 ;
1061
1062with_statement:
1063 WITH '(' tuple_expression_list ')' statement
1064 {
1065 $$ = new StatementNode( build_with( $3, $5 ) );
1066 }
1067 ;
1068
1069// If MUTEX becomes a general qualifier, there are shift/reduce conflicts, so change syntax to "with mutex".
1070mutex_statement:
1071 MUTEX '(' argument_expression_list ')' statement
1072 { SemanticError( yylloc, "Mutex statement is currently unimplemented." ); $$ = nullptr; } // FIX ME
1073 ;
1074
1075when_clause:
1076 WHEN '(' comma_expression ')' { $$ = $3; }
1077 ;
1078
1079when_clause_opt:
1080 // empty
1081 { $$ = nullptr; }
1082 | when_clause
1083 ;
1084
1085waitfor:
1086 WAITFOR '(' identifier ')'
1087 {
1088 $$ = new ExpressionNode( new NameExpr( *$3 ) );
1089 delete $3;
1090 }
1091 | WAITFOR '(' identifier ',' argument_expression_list ')'
1092 {
1093 $$ = new ExpressionNode( new NameExpr( *$3 ) );
1094 $$->set_last( $5 );
1095 delete $3;
1096 }
1097 ;
1098
1099timeout:
1100 TIMEOUT '(' comma_expression ')' { $$ = $3; }
1101 ;
1102
1103waitfor_clause:
1104 when_clause_opt waitfor statement %prec THEN
1105 { $$ = build_waitfor( $2, $3, $1 ); }
1106 | when_clause_opt waitfor statement WOR waitfor_clause
1107 { $$ = build_waitfor( $2, $3, $1, $5 ); }
1108 | when_clause_opt timeout statement %prec THEN
1109 { $$ = build_waitfor_timeout( $2, $3, $1 ); }
1110 | when_clause_opt ELSE statement
1111 { $$ = build_waitfor_timeout( nullptr, $3, $1 ); }
1112 // "else" must be conditional after timeout or timeout is never triggered (i.e., it is meaningless)
1113 | when_clause_opt timeout statement WOR when_clause ELSE statement
1114 { $$ = build_waitfor_timeout( $2, $3, $1, $7, $5 ); }
1115 ;
1116
1117waitfor_statement:
1118 when_clause_opt waitfor statement %prec THEN
1119 { $$ = new StatementNode( build_waitfor( $2, $3, $1 ) ); }
1120 | when_clause_opt waitfor statement WOR waitfor_clause
1121 { $$ = new StatementNode( build_waitfor( $2, $3, $1, $5 ) ); }
1122 ;
1123
1124exception_statement:
1125 TRY compound_statement handler_clause
1126 { $$ = new StatementNode( build_try( $2, $3, 0 ) ); }
1127 | TRY compound_statement finally_clause
1128 { $$ = new StatementNode( build_try( $2, 0, $3 ) ); }
1129 | TRY compound_statement handler_clause finally_clause
1130 { $$ = new StatementNode( build_try( $2, $3, $4 ) ); }
1131 ;
1132
1133handler_clause:
1134 handler_key '(' push push exception_declaration pop handler_predicate_opt ')' compound_statement pop
1135 { $$ = new StatementNode( build_catch( $1, $5, $7, $9 ) ); }
1136 | handler_clause handler_key '(' push push exception_declaration pop handler_predicate_opt ')' compound_statement pop
1137 { $$ = (StatementNode *)$1->set_last( new StatementNode( build_catch( $2, $6, $8, $10 ) ) ); }
1138 ;
1139
1140handler_predicate_opt:
1141 //empty
1142 { $$ = nullptr; }
1143 | ';' conditional_expression { $$ = $2; }
1144 ;
1145
1146handler_key:
1147 CATCH { $$ = CatchStmt::Terminate; }
1148 | CATCHRESUME { $$ = CatchStmt::Resume; }
1149 ;
1150
1151finally_clause:
1152 FINALLY compound_statement { $$ = new StatementNode( build_finally( $2 ) ); }
1153 ;
1154
1155exception_declaration:
1156 // No SUE declaration in parameter list.
1157 type_specifier_nobody
1158 | type_specifier_nobody declarator
1159 {
1160 typedefTable.addToEnclosingScope( TypedefTable::ID );
1161 $$ = $2->addType( $1 );
1162 }
1163 | type_specifier_nobody variable_abstract_declarator
1164 { $$ = $2->addType( $1 ); }
1165 | cfa_abstract_declarator_tuple no_attr_identifier // CFA
1166 {
1167 typedefTable.addToEnclosingScope( TypedefTable::ID );
1168 $$ = $1->addName( $2 );
1169 }
1170 | cfa_abstract_declarator_tuple // CFA
1171 ;
1172
1173enable_disable_statement:
1174 enable_disable_key identifier_list compound_statement
1175 ;
1176
1177enable_disable_key:
1178 ENABLE
1179 | DISABLE
1180 ;
1181
1182asm_statement:
1183 ASM asm_volatile_opt '(' string_literal ')' ';'
1184 { $$ = new StatementNode( build_asmstmt( $2, $4, 0 ) ); }
1185 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ')' ';' // remaining GCC
1186 { $$ = new StatementNode( build_asmstmt( $2, $4, $6 ) ); }
1187 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ')' ';'
1188 { $$ = new StatementNode( build_asmstmt( $2, $4, $6, $8 ) ); }
1189 | ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ':' asm_clobbers_list_opt ')' ';'
1190 { $$ = new StatementNode( build_asmstmt( $2, $4, $6, $8, $10 ) ); }
1191 | ASM asm_volatile_opt GOTO '(' string_literal ':' ':' asm_operands_opt ':' asm_clobbers_list_opt ':' label_list ')' ';'
1192 { $$ = new StatementNode( build_asmstmt( $2, $5, 0, $8, $10, $12 ) ); }
1193 ;
1194
1195asm_volatile_opt: // GCC
1196 // empty
1197 { $$ = false; }
1198 | VOLATILE
1199 { $$ = true; }
1200 ;
1201
1202asm_operands_opt: // GCC
1203 // empty
1204 { $$ = nullptr; } // use default argument
1205 | asm_operands_list
1206 ;
1207
1208asm_operands_list: // GCC
1209 asm_operand
1210 | asm_operands_list ',' asm_operand
1211 { $$ = (ExpressionNode *)$1->set_last( $3 ); }
1212 ;
1213
1214asm_operand: // GCC
1215 string_literal '(' constant_expression ')'
1216 { $$ = new ExpressionNode( new AsmExpr( maybeMoveBuild< Expression >( (ExpressionNode *)nullptr ), $1, maybeMoveBuild< Expression >( $3 ) ) ); }
1217 | '[' constant_expression ']' string_literal '(' constant_expression ')'
1218 { $$ = new ExpressionNode( new AsmExpr( maybeMoveBuild< Expression >( $2 ), $4, maybeMoveBuild< Expression >( $6 ) ) ); }
1219 ;
1220
1221asm_clobbers_list_opt: // GCC
1222 // empty
1223 { $$ = nullptr; } // use default argument
1224 | string_literal
1225 { $$ = new ExpressionNode( $1 ); }
1226 | asm_clobbers_list_opt ',' string_literal
1227 // set_last returns ParseNode *
1228 { $$ = (ExpressionNode *)$1->set_last( new ExpressionNode( $3 ) ); }
1229 ;
1230
1231label_list:
1232 no_attr_identifier
1233 {
1234 $$ = new LabelNode(); $$->labels.push_back( *$1 );
1235 delete $1; // allocated by lexer
1236 }
1237 | label_list ',' no_attr_identifier
1238 {
1239 $$ = $1; $1->labels.push_back( *$3 );
1240 delete $3; // allocated by lexer
1241 }
1242 ;
1243
1244//******************************* DECLARATIONS *********************************
1245
1246declaration_list_opt: // used at beginning of switch statement
1247 pop
1248 { $$ = nullptr; }
1249 | declaration_list
1250 ;
1251
1252declaration_list:
1253 declaration
1254 | declaration_list push declaration
1255 { $$ = $1->appendList( $3 ); }
1256 ;
1257
1258KR_declaration_list_opt: // used to declare parameter types in K&R style functions
1259 // empty
1260 { $$ = nullptr; }
1261 | KR_declaration_list
1262 ;
1263
1264KR_declaration_list:
1265 push c_declaration pop ';'
1266 { $$ = $2; }
1267 | KR_declaration_list push c_declaration pop ';'
1268 { $$ = $1->appendList( $3 ); }
1269 ;
1270
1271local_label_declaration_opt: // GCC, local label
1272 // empty
1273 | local_label_declaration_list
1274 ;
1275
1276local_label_declaration_list: // GCC, local label
1277 LABEL local_label_list ';'
1278 | local_label_declaration_list LABEL local_label_list ';'
1279 ;
1280
1281local_label_list: // GCC, local label
1282 no_attr_identifier_or_type_name {}
1283 | local_label_list ',' no_attr_identifier_or_type_name {}
1284 ;
1285
1286declaration: // old & new style declarations
1287 c_declaration pop ';'
1288 | cfa_declaration pop ';' // CFA
1289 | static_assert
1290 ;
1291
1292static_assert:
1293 STATICASSERT '(' constant_expression ',' string_literal ')' ';' // C11
1294 { SemanticError( yylloc, "Static assert is currently unimplemented." ); $$ = nullptr; } // FIX ME
1295
1296// C declaration syntax is notoriously confusing and error prone. Cforall provides its own type, variable and function
1297// declarations. CFA declarations use the same declaration tokens as in C; however, CFA places declaration modifiers to
1298// the left of the base type, while C declarations place modifiers to the right of the base type. CFA declaration
1299// modifiers are interpreted from left to right and the entire type specification is distributed across all variables in
1300// the declaration list (as in Pascal). ANSI C and the new CFA declarations may appear together in the same program
1301// block, but cannot be mixed within a specific declaration.
1302//
1303// CFA C
1304// [10] int x; int x[10]; // array of 10 integers
1305// [10] * char y; char *y[10]; // array of 10 pointers to char
1306
1307cfa_declaration: // CFA
1308 cfa_variable_declaration
1309 | cfa_typedef_declaration
1310 | cfa_function_declaration
1311 | type_declaring_list
1312 | trait_specifier
1313 ;
1314
1315cfa_variable_declaration: // CFA
1316 cfa_variable_specifier initializer_opt
1317 {
1318 typedefTable.addToEnclosingScope( TypedefTable::ID );
1319 $$ = $1->addInitializer( $2 );
1320 }
1321 | declaration_qualifier_list cfa_variable_specifier initializer_opt
1322 // declaration_qualifier_list also includes type_qualifier_list, so a semantic check is necessary to preclude
1323 // them as a type_qualifier cannot appear in that context.
1324 {
1325 typedefTable.addToEnclosingScope( TypedefTable::ID );
1326 $$ = $2->addQualifiers( $1 )->addInitializer( $3 );;
1327 }
1328 | cfa_variable_declaration pop ',' push identifier_or_type_name initializer_opt
1329 {
1330 typedefTable.addToEnclosingScope( *$5, TypedefTable::ID );
1331 $$ = $1->appendList( $1->cloneType( $5 )->addInitializer( $6 ) );
1332 }
1333 ;
1334
1335cfa_variable_specifier: // CFA
1336 // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
1337 // storage-class
1338 cfa_abstract_declarator_no_tuple identifier_or_type_name asm_name_opt
1339 {
1340 typedefTable.setNextIdentifier( *$2 );
1341 $$ = $1->addName( $2 )->addAsmName( $3 );
1342 }
1343 | cfa_abstract_tuple identifier_or_type_name asm_name_opt
1344 {
1345 typedefTable.setNextIdentifier( *$2 );
1346 $$ = $1->addName( $2 )->addAsmName( $3 );
1347 }
1348 | type_qualifier_list cfa_abstract_tuple identifier_or_type_name asm_name_opt
1349 {
1350 typedefTable.setNextIdentifier( *$3 );
1351 $$ = $2->addQualifiers( $1 )->addName( $3 )->addAsmName( $4 );
1352 }
1353 ;
1354
1355cfa_function_declaration: // CFA
1356 cfa_function_specifier
1357 {
1358 typedefTable.addToEnclosingScope( TypedefTable::ID );
1359 $$ = $1;
1360 }
1361 | type_qualifier_list cfa_function_specifier
1362 {
1363 typedefTable.addToEnclosingScope( TypedefTable::ID );
1364 $$ = $2->addQualifiers( $1 );
1365 }
1366 | declaration_qualifier_list cfa_function_specifier
1367 {
1368 typedefTable.addToEnclosingScope( TypedefTable::ID );
1369 $$ = $2->addQualifiers( $1 );
1370 }
1371 | declaration_qualifier_list type_qualifier_list cfa_function_specifier
1372 {
1373 typedefTable.addToEnclosingScope( TypedefTable::ID );
1374 $$ = $3->addQualifiers( $1 )->addQualifiers( $2 );
1375 }
1376 | cfa_function_declaration pop ',' push identifier_or_type_name '(' push cfa_parameter_type_list_opt pop ')'
1377 {
1378 // Append the return type at the start (left-hand-side) to each identifier in the list.
1379 DeclarationNode * ret = new DeclarationNode;
1380 ret->type = maybeClone( $1->type->base );
1381 $$ = $1->appendList( DeclarationNode::newFunction( $5, ret, $8, nullptr ) );
1382 }
1383 ;
1384
1385cfa_function_specifier: // CFA
1386// '[' ']' identifier_or_type_name '(' push cfa_parameter_type_list_opt pop ')' // S/R conflict
1387// {
1388// $$ = DeclarationNode::newFunction( $3, DeclarationNode::newTuple( 0 ), $6, 0, true );
1389// }
1390// '[' ']' identifier '(' push cfa_parameter_type_list_opt pop ')'
1391// {
1392// typedefTable.setNextIdentifier( *$5 );
1393// $$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, 0, true );
1394// }
1395// | '[' ']' TYPEDEFname '(' push cfa_parameter_type_list_opt pop ')'
1396// {
1397// typedefTable.setNextIdentifier( *$5 );
1398// $$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, 0, true );
1399// }
1400// | '[' ']' typegen_name
1401 // identifier_or_type_name must be broken apart because of the sequence:
1402 //
1403 // '[' ']' identifier_or_type_name '(' cfa_parameter_type_list_opt ')'
1404 // '[' ']' type_specifier
1405 //
1406 // type_specifier can resolve to just TYPEDEFname (e.g., typedef int T; int f( T );). Therefore this must be
1407 // flattened to allow lookahead to the '(' without having to reduce identifier_or_type_name.
1408 cfa_abstract_tuple identifier_or_type_name '(' push cfa_parameter_type_list_opt pop ')'
1409 // To obtain LR(1 ), this rule must be factored out from function return type (see cfa_abstract_declarator).
1410 {
1411 $$ = DeclarationNode::newFunction( $2, $1, $5, 0 );
1412 }
1413 | cfa_function_return identifier_or_type_name '(' push cfa_parameter_type_list_opt pop ')'
1414 {
1415 $$ = DeclarationNode::newFunction( $2, $1, $5, 0 );
1416 }
1417 ;
1418
1419cfa_function_return: // CFA
1420 '[' push cfa_parameter_list pop ']'
1421 { $$ = DeclarationNode::newTuple( $3 ); }
1422 | '[' push cfa_parameter_list pop ',' push cfa_abstract_parameter_list pop ']'
1423 // To obtain LR(1 ), the last cfa_abstract_parameter_list is added into this flattened rule to lookahead to the
1424 // ']'.
1425 { $$ = DeclarationNode::newTuple( $3->appendList( $7 ) ); }
1426 ;
1427
1428cfa_typedef_declaration: // CFA
1429 TYPEDEF cfa_variable_specifier
1430 {
1431 typedefTable.addToEnclosingScope( TypedefTable::TD );
1432 $$ = $2->addTypedef();
1433 }
1434 | TYPEDEF cfa_function_specifier
1435 {
1436 typedefTable.addToEnclosingScope( TypedefTable::TD );
1437 $$ = $2->addTypedef();
1438 }
1439 | cfa_typedef_declaration pop ',' push no_attr_identifier
1440 {
1441 typedefTable.addToEnclosingScope( *$5, TypedefTable::TD );
1442 $$ = $1->appendList( $1->cloneType( $5 ) );
1443 }
1444 ;
1445
1446// Traditionally typedef is part of storage-class specifier for syntactic convenience only. Here, it is factored out as
1447// a separate form of declaration, which syntactically precludes storage-class specifiers and initialization.
1448
1449typedef_declaration:
1450 TYPEDEF type_specifier declarator
1451 {
1452 typedefTable.addToEnclosingScope( TypedefTable::TD );
1453 $$ = $3->addType( $2 )->addTypedef();
1454 }
1455 | typedef_declaration pop ',' push declarator
1456 {
1457 typedefTable.addToEnclosingScope( TypedefTable::TD );
1458 $$ = $1->appendList( $1->cloneBaseType( $5 )->addTypedef() );
1459 }
1460 | type_qualifier_list TYPEDEF type_specifier declarator // remaining OBSOLESCENT (see 2 )
1461 {
1462 typedefTable.addToEnclosingScope( TypedefTable::TD );
1463 $$ = $4->addType( $3 )->addQualifiers( $1 )->addTypedef();
1464 }
1465 | type_specifier TYPEDEF declarator
1466 {
1467 typedefTable.addToEnclosingScope( TypedefTable::TD );
1468 $$ = $3->addType( $1 )->addTypedef();
1469 }
1470 | type_specifier TYPEDEF type_qualifier_list declarator
1471 {
1472 typedefTable.addToEnclosingScope( TypedefTable::TD );
1473 $$ = $4->addQualifiers( $1 )->addTypedef()->addType( $1 );
1474 }
1475 ;
1476
1477typedef_expression:
1478 // GCC, naming expression type: typedef name = exp; gives a name to the type of an expression
1479 TYPEDEF no_attr_identifier '=' assignment_expression
1480 {
1481 typedefTable.addToEnclosingScope( *$2, TypedefTable::TD );
1482 $$ = DeclarationNode::newName( 0 ); // unimplemented
1483 }
1484 | typedef_expression pop ',' push no_attr_identifier '=' assignment_expression
1485 {
1486 typedefTable.addToEnclosingScope( *$5, TypedefTable::TD );
1487 $$ = DeclarationNode::newName( 0 ); // unimplemented
1488 }
1489 ;
1490
1491//c_declaration:
1492// declaring_list pop ';'
1493// | typedef_declaration pop ';'
1494// | typedef_expression pop ';' // GCC, naming expression type
1495// | sue_declaration_specifier pop ';'
1496// ;
1497//
1498//declaring_list:
1499// // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
1500// // storage-class
1501// declarator asm_name_opt initializer_opt
1502// {
1503// typedefTable.addToEnclosingScope( TypedefTable::ID );
1504// $$ = ( $2->addType( $1 ))->addAsmName( $3 )->addInitializer( $4 );
1505// }
1506// | declaring_list ',' attribute_list_opt declarator asm_name_opt initializer_opt
1507// {
1508// typedefTable.addToEnclosingScope( TypedefTable::ID );
1509// $$ = $1->appendList( $1->cloneBaseType( $4->addAsmName( $5 )->addInitializer( $6 ) ) );
1510// }
1511// ;
1512
1513c_declaration:
1514 declaration_specifier declaring_list
1515 {
1516 $$ = distAttr( $1, $2 );
1517 }
1518 | typedef_declaration
1519 | typedef_expression // GCC, naming expression type
1520 | sue_declaration_specifier
1521 ;
1522
1523declaring_list:
1524 // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
1525 // storage-class
1526 declarator asm_name_opt initializer_opt
1527 {
1528 typedefTable.addToEnclosingScope( TypedefTable::ID );
1529 $$ = $1->addAsmName( $2 )->addInitializer( $3 );
1530 }
1531 | declaring_list ',' attribute_list_opt declarator asm_name_opt initializer_opt
1532 {
1533 typedefTable.addToEnclosingScope( TypedefTable::ID );
1534 $$ = $1->appendList( $4->addQualifiers( $3 )->addAsmName( $5 )->addInitializer( $6 ) );
1535 }
1536 ;
1537
1538declaration_specifier: // type specifier + storage class
1539 basic_declaration_specifier
1540 | sue_declaration_specifier
1541 | type_declaration_specifier
1542 ;
1543
1544declaration_specifier_nobody: // type specifier + storage class - {...}
1545 // Preclude SUE declarations in restricted scopes:
1546 //
1547 // int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... }
1548 //
1549 // because it is impossible to call f due to name equivalence.
1550 basic_declaration_specifier
1551 | sue_declaration_specifier_nobody
1552 | type_declaration_specifier
1553 ;
1554
1555type_specifier: // type specifier
1556 basic_type_specifier
1557 | sue_type_specifier
1558 | type_type_specifier
1559 ;
1560
1561type_specifier_nobody: // type specifier - {...}
1562 // Preclude SUE declarations in restricted scopes:
1563 //
1564 // int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... }
1565 //
1566 // because it is impossible to call f due to name equivalence.
1567 basic_type_specifier
1568 | sue_type_specifier_nobody
1569 | type_type_specifier
1570 ;
1571
1572type_qualifier_list_opt: // GCC, used in asm_statement
1573 // empty
1574 { $$ = nullptr; }
1575 | type_qualifier_list
1576 ;
1577
1578type_qualifier_list:
1579 // A semantic check is necessary to ensure a type qualifier is appropriate for the kind of declaration.
1580 //
1581 // ISO/IEC 9899:1999 Section 6.7.3(4 ) : If the same qualifier appears more than once in the same
1582 // specifier-qualifier-list, either directly or via one or more typedefs, the behavior is the same as if it
1583 // appeared only once.
1584 type_qualifier
1585 | type_qualifier_list type_qualifier
1586 { $$ = $1->addQualifiers( $2 ); }
1587 ;
1588
1589type_qualifier:
1590 type_qualifier_name
1591 | attribute
1592 ;
1593
1594type_qualifier_name:
1595 CONST
1596 { $$ = DeclarationNode::newTypeQualifier( Type::Const ); }
1597 | RESTRICT
1598 { $$ = DeclarationNode::newTypeQualifier( Type::Restrict ); }
1599 | VOLATILE
1600 { $$ = DeclarationNode::newTypeQualifier( Type::Volatile ); }
1601 | ATOMIC
1602 { $$ = DeclarationNode::newTypeQualifier( Type::Atomic ); }
1603 | forall
1604 ;
1605
1606forall:
1607 FORALL '('
1608 {
1609 typedefTable.enterScope();
1610 }
1611 type_parameter_list ')' // CFA
1612 {
1613 typedefTable.leaveScope();
1614 $$ = DeclarationNode::newForall( $4 );
1615 }
1616 ;
1617
1618declaration_qualifier_list:
1619 storage_class_list
1620 | type_qualifier_list storage_class_list // remaining OBSOLESCENT (see 2 )
1621 { $$ = $1->addQualifiers( $2 ); }
1622 | declaration_qualifier_list type_qualifier_list storage_class_list
1623 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1624 ;
1625
1626storage_class_list:
1627 // A semantic check is necessary to ensure a storage class is appropriate for the kind of declaration and that
1628 // only one of each is specified, except for inline, which can appear with the others.
1629 //
1630 // ISO/IEC 9899:1999 Section 6.7.1(2) : At most, one storage-class specifier may be given in the declaration
1631 // specifiers in a declaration.
1632 storage_class
1633 | storage_class_list storage_class
1634 { $$ = $1->addQualifiers( $2 ); }
1635 ;
1636
1637storage_class:
1638 EXTERN
1639 { $$ = DeclarationNode::newStorageClass( Type::Extern ); }
1640 | STATIC
1641 { $$ = DeclarationNode::newStorageClass( Type::Static ); }
1642 | AUTO
1643 { $$ = DeclarationNode::newStorageClass( Type::Auto ); }
1644 | REGISTER
1645 { $$ = DeclarationNode::newStorageClass( Type::Register ); }
1646 | THREADLOCAL // C11
1647 { $$ = DeclarationNode::newStorageClass( Type::Threadlocal ); }
1648 // Put function specifiers here to simplify parsing rules, but separate them semantically.
1649 | INLINE // C99
1650 { $$ = DeclarationNode::newFuncSpecifier( Type::Inline ); }
1651 | FORTRAN // C99
1652 { $$ = DeclarationNode::newFuncSpecifier( Type::Fortran ); }
1653 | NORETURN // C11
1654 { $$ = DeclarationNode::newFuncSpecifier( Type::Noreturn ); }
1655 ;
1656
1657basic_type_name:
1658 VOID
1659 { $$ = DeclarationNode::newBasicType( DeclarationNode::Void ); }
1660 | BOOL // C99
1661 { $$ = DeclarationNode::newBasicType( DeclarationNode::Bool ); }
1662 | CHAR
1663 { $$ = DeclarationNode::newBasicType( DeclarationNode::Char ); }
1664 | INT
1665 { $$ = DeclarationNode::newBasicType( DeclarationNode::Int ); }
1666 | INT128
1667 { $$ = DeclarationNode::newBasicType( DeclarationNode::Int128 ); }
1668 | FLOAT
1669 { $$ = DeclarationNode::newBasicType( DeclarationNode::Float ); }
1670 | FLOAT80
1671 { $$ = DeclarationNode::newBasicType( DeclarationNode::Float80 ); }
1672 | FLOAT128
1673 { $$ = DeclarationNode::newBasicType( DeclarationNode::Float128 ); }
1674 | DOUBLE
1675 { $$ = DeclarationNode::newBasicType( DeclarationNode::Double ); }
1676 | COMPLEX // C99
1677 { $$ = DeclarationNode::newComplexType( DeclarationNode::Complex ); }
1678 | IMAGINARY // C99
1679 { $$ = DeclarationNode::newComplexType( DeclarationNode::Imaginary ); }
1680 | SIGNED
1681 { $$ = DeclarationNode::newSignedNess( DeclarationNode::Signed ); }
1682 | UNSIGNED
1683 { $$ = DeclarationNode::newSignedNess( DeclarationNode::Unsigned ); }
1684 | SHORT
1685 { $$ = DeclarationNode::newLength( DeclarationNode::Short ); }
1686 | LONG
1687 { $$ = DeclarationNode::newLength( DeclarationNode::Long ); }
1688 | ZERO_T
1689 { $$ = DeclarationNode::newBuiltinType( DeclarationNode::Zero ); }
1690 | ONE_T
1691 { $$ = DeclarationNode::newBuiltinType( DeclarationNode::One ); }
1692 | VALIST // GCC, __builtin_va_list
1693 { $$ = DeclarationNode::newBuiltinType( DeclarationNode::Valist ); }
1694 ;
1695
1696basic_declaration_specifier:
1697 // A semantic check is necessary for conflicting storage classes.
1698 basic_type_specifier
1699 | declaration_qualifier_list basic_type_specifier
1700 { $$ = $2->addQualifiers( $1 ); }
1701 | basic_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1702 { $$ = $1->addQualifiers( $2 ); }
1703 | basic_declaration_specifier storage_class type_qualifier_list
1704 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1705 | basic_declaration_specifier storage_class basic_type_specifier
1706 { $$ = $3->addQualifiers( $2 )->addType( $1 ); }
1707 ;
1708
1709basic_type_specifier:
1710 direct_type
1711 | type_qualifier_list_opt indirect_type type_qualifier_list_opt
1712 { $$ = $2->addQualifiers( $1 )->addQualifiers( $3 ); }
1713 ;
1714
1715direct_type:
1716 // A semantic check is necessary for conflicting type qualifiers.
1717 basic_type_name
1718 | type_qualifier_list basic_type_name
1719 { $$ = $2->addQualifiers( $1 ); }
1720 | direct_type type_qualifier
1721 { $$ = $1->addQualifiers( $2 ); }
1722 | direct_type basic_type_name
1723 { $$ = $1->addType( $2 ); }
1724 ;
1725
1726indirect_type:
1727 TYPEOF '(' type ')' // GCC: typeof(x) y;
1728 { $$ = $3; }
1729 | TYPEOF '(' comma_expression ')' // GCC: typeof(a+b) y;
1730 { $$ = DeclarationNode::newTypeof( $3 ); }
1731 | ATTR_TYPEGENname '(' type ')' // CFA: e.g., @type(x) y;
1732 { $$ = DeclarationNode::newAttr( $1, $3 ); }
1733 | ATTR_TYPEGENname '(' comma_expression ')' // CFA: e.g., @type(a+b) y;
1734 { $$ = DeclarationNode::newAttr( $1, $3 ); }
1735 ;
1736
1737sue_declaration_specifier: // struct, union, enum + storage class + type specifier
1738 sue_type_specifier
1739 | declaration_qualifier_list sue_type_specifier
1740 { $$ = $2->addQualifiers( $1 ); }
1741 | sue_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1742 { $$ = $1->addQualifiers( $2 ); }
1743 | sue_declaration_specifier storage_class type_qualifier_list
1744 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1745 ;
1746
1747sue_type_specifier: // struct, union, enum + type specifier
1748 elaborated_type
1749 | type_qualifier_list
1750 { if ( $1->type != nullptr && $1->type->forall ) forall = true; } // remember generic type
1751 elaborated_type
1752 { $$ = $3->addQualifiers( $1 ); }
1753 | sue_type_specifier type_qualifier
1754 { $$ = $1->addQualifiers( $2 ); }
1755 ;
1756
1757sue_declaration_specifier_nobody: // struct, union, enum - {...} + storage class + type specifier
1758 sue_type_specifier_nobody
1759 | declaration_qualifier_list sue_type_specifier_nobody
1760 { $$ = $2->addQualifiers( $1 ); }
1761 | sue_declaration_specifier_nobody storage_class // remaining OBSOLESCENT (see 2)
1762 { $$ = $1->addQualifiers( $2 ); }
1763 | sue_declaration_specifier_nobody storage_class type_qualifier_list
1764 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1765 ;
1766
1767sue_type_specifier_nobody: // struct, union, enum - {...} + type specifier
1768 elaborated_type_nobody
1769 | type_qualifier_list elaborated_type_nobody
1770 { $$ = $2->addQualifiers( $1 ); }
1771 | sue_type_specifier_nobody type_qualifier
1772 { $$ = $1->addQualifiers( $2 ); }
1773 ;
1774
1775type_declaration_specifier:
1776 type_type_specifier
1777 | declaration_qualifier_list type_type_specifier
1778 { $$ = $2->addQualifiers( $1 ); }
1779 | type_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1780 { $$ = $1->addQualifiers( $2 ); }
1781 | type_declaration_specifier storage_class type_qualifier_list
1782 { $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1783 ;
1784
1785type_type_specifier: // typedef types
1786 type_name
1787 | type_qualifier_list type_name
1788 { $$ = $2->addQualifiers( $1 ); }
1789 | type_type_specifier type_qualifier
1790 { $$ = $1->addQualifiers( $2 ); }
1791 ;
1792
1793type_name:
1794 TYPEDEFname
1795 { $$ = DeclarationNode::newFromTypedef( $1 ); }
1796 | '.' TYPEDEFname
1797 { $$ = DeclarationNode::newFromTypedef( $2 ); } // FIX ME
1798 | type_name '.' TYPEDEFname
1799 { $$ = DeclarationNode::newFromTypedef( $3 ); } // FIX ME
1800 | typegen_name
1801 | '.' typegen_name
1802 { $$ = $2; } // FIX ME
1803 | type_name '.' typegen_name
1804 { $$ = $3; } // FIX ME
1805 ;
1806
1807typegen_name: // CFA
1808 TYPEGENname
1809 { $$ = DeclarationNode::newFromTypeGen( $1, nullptr ); }
1810 | TYPEGENname '(' ')'
1811 { $$ = DeclarationNode::newFromTypeGen( $1, nullptr ); }
1812 | TYPEGENname '(' type_list ')'
1813 { $$ = DeclarationNode::newFromTypeGen( $1, $3 ); }
1814 ;
1815
1816elaborated_type: // struct, union, enum
1817 aggregate_type
1818 | enum_type
1819 ;
1820
1821elaborated_type_nobody: // struct, union, enum - {...}
1822 aggregate_type_nobody
1823 | enum_type_nobody
1824 ;
1825
1826aggregate_type: // struct, union
1827 aggregate_key attribute_list_opt '{' field_declaration_list '}'
1828 { $$ = DeclarationNode::newAggregate( $1, new string( DeclarationNode::anonymous.newName() ), nullptr, $4, true )->addQualifiers( $2 ); }
1829 | aggregate_key attribute_list_opt no_attr_identifier_or_type_name
1830 {
1831 typedefTable.makeTypedef( *$3 ); // create typedef
1832 if ( forall ) typedefTable.changeKind( *$3, TypedefTable::TG ); // possibly update
1833 forall = false; // reset
1834 }
1835 '{' field_declaration_list '}'
1836 { $$ = DeclarationNode::newAggregate( $1, $3, nullptr, $6, true )->addQualifiers( $2 ); }
1837 | aggregate_key attribute_list_opt '(' type_list ')' '{' field_declaration_list '}' // CFA
1838 { $$ = DeclarationNode::newAggregate( $1, new string( DeclarationNode::anonymous.newName() ), $4, $7, false )->addQualifiers( $2 ); }
1839 | aggregate_type_nobody
1840 ;
1841
1842aggregate_type_nobody: // struct, union - {...}
1843 aggregate_key attribute_list_opt no_attr_identifier
1844 {
1845 typedefTable.makeTypedef( *$3 );
1846 $$ = DeclarationNode::newAggregate( $1, $3, nullptr, nullptr, false )->addQualifiers( $2 );
1847 }
1848 | aggregate_key attribute_list_opt TYPEDEFname
1849 {
1850 typedefTable.makeTypedef( *$3 );
1851 $$ = DeclarationNode::newAggregate( $1, $3, nullptr, nullptr, false )->addQualifiers( $2 );
1852 }
1853 | aggregate_key attribute_list_opt typegen_name // CFA
1854 {
1855 // Create new generic declaration with same name as previous forward declaration, where the IDENTIFIER is
1856 // switched to a TYPEGENname. Link any generic arguments from typegen_name to new generic declaration and
1857 // delete newFromTypeGen.
1858 $$ = DeclarationNode::newAggregate( $1, $3->type->symbolic.name, $3->type->symbolic.actuals, nullptr, false )->addQualifiers( $2 );
1859 $3->type->symbolic.name = nullptr;
1860 $3->type->symbolic.actuals = nullptr;
1861 delete $3;
1862 }
1863 ;
1864
1865aggregate_key:
1866 STRUCT
1867 { $$ = DeclarationNode::Struct; }
1868 | UNION
1869 { $$ = DeclarationNode::Union; }
1870 | EXCEPTION
1871 { $$ = DeclarationNode::Exception; }
1872 | COROUTINE
1873 { $$ = DeclarationNode::Coroutine; }
1874 | MONITOR
1875 { $$ = DeclarationNode::Monitor; }
1876 | THREAD
1877 { $$ = DeclarationNode::Thread; }
1878 ;
1879
1880field_declaration_list:
1881 // empty
1882 { $$ = nullptr; }
1883 | field_declaration_list field_declaration
1884 { $$ = $1 ? $1->appendList( $2 ) : $2; }
1885 ;
1886
1887field_declaration:
1888 cfa_field_declaring_list ';' // CFA, new style field declaration
1889 | EXTENSION cfa_field_declaring_list ';' // GCC
1890 {
1891 distExt( $2 ); // mark all fields in list
1892 $$ = $2;
1893 }
1894 | type_specifier field_declaring_list ';'
1895 {
1896 $$ = distAttr( $1, $2 ); }
1897 | EXTENSION type_specifier field_declaring_list ';' // GCC
1898 {
1899 distExt( $3 ); // mark all fields in list
1900 $$ = distAttr( $2, $3 );
1901 }
1902 | static_assert
1903 ;
1904
1905cfa_field_declaring_list: // CFA, new style field declaration
1906 cfa_abstract_declarator_tuple // CFA, no field name
1907 | cfa_abstract_declarator_tuple no_attr_identifier_or_type_name
1908 { $$ = $1->addName( $2 ); }
1909 | cfa_field_declaring_list ',' no_attr_identifier_or_type_name
1910 { $$ = $1->appendList( $1->cloneType( $3 ) ); }
1911 | cfa_field_declaring_list ',' // CFA, no field name
1912 { $$ = $1->appendList( $1->cloneType( 0 ) ); }
1913 ;
1914
1915field_declaring_list:
1916 field_declarator
1917 | field_declaring_list ',' attribute_list_opt field_declarator
1918 { $$ = $1->appendList( $4->addQualifiers( $3 ) ); }
1919 ;
1920
1921field_declarator:
1922 // empty
1923 { $$ = DeclarationNode::newName( 0 ); /* XXX */ } // CFA, no field name
1924 // '@'
1925 // { $$ = DeclarationNode::newName( new string( DeclarationNode::anonymous.newName() ) ); } // CFA, no field name
1926 | bit_subrange_size // no field name
1927 { $$ = DeclarationNode::newBitfield( $1 ); }
1928 | variable_declarator bit_subrange_size_opt
1929 // A semantic check is required to ensure bit_subrange only appears on base type int.
1930 { $$ = $1->addBitfield( $2 ); }
1931 | variable_type_redeclarator bit_subrange_size_opt
1932 // A semantic check is required to ensure bit_subrange only appears on base type int.
1933 { $$ = $1->addBitfield( $2 ); }
1934 | variable_abstract_declarator // CFA, no field name
1935 ;
1936
1937bit_subrange_size_opt:
1938 // empty
1939 { $$ = nullptr; }
1940 | bit_subrange_size
1941 { $$ = $1; }
1942 ;
1943
1944bit_subrange_size:
1945 ':' constant_expression
1946 { $$ = $2; }
1947 ;
1948
1949enum_type: // enum
1950 ENUM attribute_list_opt '{' enumerator_list comma_opt '}'
1951 { $$ = DeclarationNode::newEnum( new string( DeclarationNode::anonymous.newName() ), $4, true )->addQualifiers( $2 ); }
1952 | ENUM attribute_list_opt no_attr_identifier_or_type_name
1953 { typedefTable.makeTypedef( *$3 ); }
1954 '{' enumerator_list comma_opt '}'
1955 { $$ = DeclarationNode::newEnum( $3, $6, true )->addQualifiers( $2 ); }
1956 | enum_type_nobody
1957 ;
1958
1959enum_type_nobody: // enum - {...}
1960 ENUM attribute_list_opt no_attr_identifier_or_type_name
1961 {
1962 typedefTable.makeTypedef( *$3 );
1963 $$ = DeclarationNode::newEnum( $3, 0, false )->addQualifiers( $2 );
1964 }
1965 ;
1966
1967enumerator_list:
1968 no_attr_identifier_or_type_name enumerator_value_opt
1969 { $$ = DeclarationNode::newEnumConstant( $1, $2 ); }
1970 | enumerator_list ',' no_attr_identifier_or_type_name enumerator_value_opt
1971 { $$ = $1->appendList( DeclarationNode::newEnumConstant( $3, $4 ) ); }
1972 ;
1973
1974enumerator_value_opt:
1975 // empty
1976 { $$ = nullptr; }
1977 | '=' constant_expression
1978 { $$ = $2; }
1979 ;
1980
1981cfa_parameter_type_list_opt: // CFA, abstract + real
1982 // empty
1983 { $$ = DeclarationNode::newBasicType( DeclarationNode::Void ); }
1984 | ELLIPSIS
1985 { $$ = nullptr; }
1986 | cfa_abstract_parameter_list
1987 | cfa_parameter_list
1988 | cfa_parameter_list pop ',' push cfa_abstract_parameter_list
1989 { $$ = $1->appendList( $5 ); }
1990 | cfa_abstract_parameter_list pop ',' push ELLIPSIS
1991 { $$ = $1->addVarArgs(); }
1992 | cfa_parameter_list pop ',' push ELLIPSIS
1993 { $$ = $1->addVarArgs(); }
1994 ;
1995
1996cfa_parameter_list: // CFA
1997 // To obtain LR(1) between cfa_parameter_list and cfa_abstract_tuple, the last cfa_abstract_parameter_list is
1998 // factored out from cfa_parameter_list, flattening the rules to get lookahead to the ']'.
1999 cfa_parameter_declaration
2000 | cfa_abstract_parameter_list pop ',' push cfa_parameter_declaration
2001 { $$ = $1->appendList( $5 ); }
2002 | cfa_parameter_list pop ',' push cfa_parameter_declaration
2003 { $$ = $1->appendList( $5 ); }
2004 | cfa_parameter_list pop ',' push cfa_abstract_parameter_list pop ',' push cfa_parameter_declaration
2005 { $$ = $1->appendList( $5 )->appendList( $9 ); }
2006 ;
2007
2008cfa_abstract_parameter_list: // CFA, new & old style abstract
2009 cfa_abstract_parameter_declaration
2010 | cfa_abstract_parameter_list pop ',' push cfa_abstract_parameter_declaration
2011 { $$ = $1->appendList( $5 ); }
2012 ;
2013
2014parameter_type_list_opt:
2015 // empty
2016 { $$ = nullptr; }
2017 | ELLIPSIS
2018 { $$ = nullptr; }
2019 | parameter_list
2020 | parameter_list pop ',' push ELLIPSIS
2021 { $$ = $1->addVarArgs(); }
2022 ;
2023
2024parameter_list: // abstract + real
2025 abstract_parameter_declaration
2026 | parameter_declaration
2027 | parameter_list pop ',' push abstract_parameter_declaration
2028 { $$ = $1->appendList( $5 ); }
2029 | parameter_list pop ',' push parameter_declaration
2030 { $$ = $1->appendList( $5 ); }
2031 ;
2032
2033// Provides optional identifier names (abstract_declarator/variable_declarator), no initialization, different semantics
2034// for typedef name by using type_parameter_redeclarator instead of typedef_redeclarator, and function prototypes.
2035
2036cfa_parameter_declaration: // CFA, new & old style parameter declaration
2037 parameter_declaration
2038 | cfa_identifier_parameter_declarator_no_tuple identifier_or_type_name default_initialize_opt
2039 { $$ = $1->addName( $2 ); }
2040 | cfa_abstract_tuple identifier_or_type_name default_initialize_opt
2041 // To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator).
2042 { $$ = $1->addName( $2 ); }
2043 | type_qualifier_list cfa_abstract_tuple identifier_or_type_name default_initialize_opt
2044 { $$ = $2->addName( $3 )->addQualifiers( $1 ); }
2045 | cfa_function_specifier
2046 ;
2047
2048cfa_abstract_parameter_declaration: // CFA, new & old style parameter declaration
2049 abstract_parameter_declaration
2050 | cfa_identifier_parameter_declarator_no_tuple
2051 | cfa_abstract_tuple
2052 // To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator).
2053 | type_qualifier_list cfa_abstract_tuple
2054 { $$ = $2->addQualifiers( $1 ); }
2055 | cfa_abstract_function
2056 ;
2057
2058parameter_declaration:
2059 // No SUE declaration in parameter list.
2060 declaration_specifier_nobody identifier_parameter_declarator default_initialize_opt
2061 {
2062 typedefTable.addToEnclosingScope( TypedefTable::ID );
2063 $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr );
2064 }
2065 | declaration_specifier_nobody type_parameter_redeclarator default_initialize_opt
2066 {
2067 typedefTable.addToEnclosingScope( TypedefTable::ID );
2068 $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr );
2069 }
2070 ;
2071
2072abstract_parameter_declaration:
2073 declaration_specifier_nobody default_initialize_opt
2074 { $$ = $1->addInitializer( $2 ? new InitializerNode( $2 ) : nullptr ); }
2075 | declaration_specifier_nobody abstract_parameter_declarator default_initialize_opt
2076 { $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
2077 ;
2078
2079// ISO/IEC 9899:1999 Section 6.9.1(6) : "An identifier declared as a typedef name shall not be redeclared as a
2080// parameter." Because the scope of the K&R-style parameter-list sees the typedef first, the following is based only on
2081// identifiers. The ANSI-style parameter-list can redefine a typedef name.
2082
2083identifier_list: // K&R-style parameter list => no types
2084 no_attr_identifier
2085 { $$ = DeclarationNode::newName( $1 ); }
2086 | identifier_list ',' no_attr_identifier
2087 { $$ = $1->appendList( DeclarationNode::newName( $3 ) ); }
2088 ;
2089
2090identifier_or_type_name:
2091 identifier
2092 | TYPEDEFname
2093 | TYPEGENname
2094 ;
2095
2096no_attr_identifier_or_type_name:
2097 no_attr_identifier
2098 | TYPEDEFname
2099 | TYPEGENname
2100 ;
2101
2102type_no_function: // sizeof, alignof, cast (constructor)
2103 cfa_abstract_declarator_tuple // CFA
2104 | type_specifier
2105 | type_specifier abstract_declarator
2106 { $$ = $2->addType( $1 ); }
2107 ;
2108
2109type: // typeof, assertion
2110 type_no_function
2111 | cfa_abstract_function // CFA
2112 ;
2113
2114initializer_opt:
2115 // empty
2116 { $$ = nullptr; }
2117 | '=' initializer
2118 { $$ = $2; }
2119 | '=' VOID
2120 { $$ = nullptr; }
2121 | ATassign initializer
2122 { $$ = $2->set_maybeConstructed( false ); }
2123 ;
2124
2125initializer:
2126 assignment_expression { $$ = new InitializerNode( $1 ); }
2127 | '{' initializer_list comma_opt '}' { $$ = new InitializerNode( $2, true ); }
2128 ;
2129
2130initializer_list:
2131 // empty
2132 { $$ = nullptr; }
2133 | initializer
2134 | designation initializer { $$ = $2->set_designators( $1 ); }
2135 | initializer_list ',' initializer { $$ = (InitializerNode *)( $1->set_last( $3 ) ); }
2136 | initializer_list ',' designation initializer
2137 { $$ = (InitializerNode *)( $1->set_last( $4->set_designators( $3 ) ) ); }
2138 ;
2139
2140// There is an unreconcileable parsing problem between C99 and CFA with respect to designators. The problem is use of
2141// '=' to separator the designator from the initializer value, as in:
2142//
2143// int x[10] = { [1] = 3 };
2144//
2145// The string "[1] = 3" can be parsed as a designator assignment or a tuple assignment. To disambiguate this case, CFA
2146// changes the syntax from "=" to ":" as the separator between the designator and initializer. GCC does uses ":" for
2147// field selection. The optional use of the "=" in GCC, or in this case ":", cannot be supported either due to
2148// shift/reduce conflicts
2149
2150designation:
2151 designator_list ':' // C99, CFA uses ":" instead of "="
2152 | no_attr_identifier ':' // GCC, field name
2153 { $$ = new ExpressionNode( build_varref( $1 ) ); }
2154 ;
2155
2156designator_list: // C99
2157 designator
2158 | designator_list designator
2159 { $$ = (ExpressionNode *)( $1->set_last( $2 ) ); }
2160 //| designator_list designator { $$ = new ExpressionNode( $1, $2 ); }
2161 ;
2162
2163designator:
2164 '.' no_attr_identifier // C99, field name
2165 { $$ = new ExpressionNode( build_varref( $2 ) ); }
2166 | '[' push assignment_expression pop ']' // C99, single array element
2167 // assignment_expression used instead of constant_expression because of shift/reduce conflicts with tuple.
2168 { $$ = $3; }
2169 | '[' push subrange pop ']' // CFA, multiple array elements
2170 { $$ = $3; }
2171 | '[' push constant_expression ELLIPSIS constant_expression pop ']' // GCC, multiple array elements
2172 { $$ = new ExpressionNode( new RangeExpr( maybeMoveBuild< Expression >( $3 ), maybeMoveBuild< Expression >( $5 ) ) ); }
2173 | '.' '[' push field_list pop ']' // CFA, tuple field selector
2174 { $$ = $4; }
2175 ;
2176
2177// The CFA type system is based on parametric polymorphism, the ability to declare functions with type parameters,
2178// rather than an object-oriented type system. This required four groups of extensions:
2179//
2180// Overloading: function, data, and operator identifiers may be overloaded.
2181//
2182// Type declarations: "type" is used to generate new types for declaring objects. Similarly, "dtype" is used for object
2183// and incomplete types, and "ftype" is used for function types. Type declarations with initializers provide
2184// definitions of new types. Type declarations with storage class "extern" provide opaque types.
2185//
2186// Polymorphic functions: A forall clause declares a type parameter. The corresponding argument is inferred at the call
2187// site. A polymorphic function is not a template; it is a function, with an address and a type.
2188//
2189// Specifications and Assertions: Specifications are collections of declarations parameterized by one or more
2190// types. They serve many of the purposes of abstract classes, and specification hierarchies resemble subclass
2191// hierarchies. Unlike classes, they can define relationships between types. Assertions declare that a type or
2192// types provide the operations declared by a specification. Assertions are normally used to declare requirements
2193// on type arguments of polymorphic functions.
2194
2195type_parameter_list: // CFA
2196 type_parameter
2197 { $$ = $1; }
2198 | type_parameter_list ',' type_parameter
2199 { $$ = $1->appendList( $3 ); }
2200 ;
2201
2202type_initializer_opt: // CFA
2203 // empty
2204 { $$ = nullptr; }
2205 | '=' type
2206 { $$ = $2; }
2207 ;
2208
2209type_parameter: // CFA
2210 type_class no_attr_identifier_or_type_name
2211 { typedefTable.addToEnclosingScope( *$2, TypedefTable::TD ); }
2212 type_initializer_opt assertion_list_opt
2213 { $$ = DeclarationNode::newTypeParam( $1, $2 )->addTypeInitializer( $4 )->addAssertions( $5 ); }
2214 | type_specifier identifier_parameter_declarator
2215 ;
2216
2217type_class: // CFA
2218 OTYPE
2219 { $$ = DeclarationNode::Otype; }
2220 | DTYPE
2221 { $$ = DeclarationNode::Dtype; }
2222 | FTYPE
2223 { $$ = DeclarationNode::Ftype; }
2224 | TTYPE
2225 { $$ = DeclarationNode::Ttype; }
2226 ;
2227
2228assertion_list_opt: // CFA
2229 // empty
2230 { $$ = nullptr; }
2231 | assertion_list_opt assertion
2232 { $$ = $1 ? $1->appendList( $2 ) : $2; }
2233 ;
2234
2235assertion: // CFA
2236 '|' no_attr_identifier_or_type_name '(' type_list ')'
2237 {
2238 typedefTable.openTrait( *$2 );
2239 $$ = DeclarationNode::newTraitUse( $2, $4 );
2240 }
2241 | '|' '{' push trait_declaration_list '}'
2242 { $$ = $4; }
2243 | '|' '(' push type_parameter_list pop ')' '{' push trait_declaration_list '}' '(' type_list ')'
2244 { $$ = nullptr; }
2245 ;
2246
2247type_list: // CFA
2248 type
2249 { $$ = new ExpressionNode( new TypeExpr( maybeMoveBuildType( $1 ) ) ); }
2250 | assignment_expression
2251 | type_list ',' type
2252 { $$ = (ExpressionNode *)( $1->set_last( new ExpressionNode( new TypeExpr( maybeMoveBuildType( $3 ) ) ) ) ); }
2253 | type_list ',' assignment_expression
2254 { $$ = (ExpressionNode *)( $1->set_last( $3 )); }
2255 ;
2256
2257type_declaring_list: // CFA
2258 OTYPE type_declarator
2259 { $$ = $2; }
2260 | storage_class_list OTYPE type_declarator
2261 { $$ = $3->addQualifiers( $1 ); }
2262 | type_declaring_list ',' type_declarator
2263 { $$ = $1->appendList( $3->copySpecifiers( $1 ) ); }
2264 ;
2265
2266type_declarator: // CFA
2267 type_declarator_name assertion_list_opt
2268 { $$ = $1->addAssertions( $2 ); }
2269 | type_declarator_name assertion_list_opt '=' type
2270 { $$ = $1->addAssertions( $2 )->addType( $4 ); }
2271 ;
2272
2273type_declarator_name: // CFA
2274 no_attr_identifier_or_type_name
2275 {
2276 typedefTable.addToEnclosingScope( *$1, TypedefTable::TD );
2277 $$ = DeclarationNode::newTypeDecl( $1, 0 );
2278 }
2279 | no_attr_identifier_or_type_name '(' push type_parameter_list pop ')'
2280 {
2281 typedefTable.addToEnclosingScope( *$1, TypedefTable::TG );
2282 $$ = DeclarationNode::newTypeDecl( $1, $4 );
2283 }
2284 ;
2285
2286trait_specifier: // CFA
2287 TRAIT no_attr_identifier_or_type_name '(' push type_parameter_list pop ')' '{' '}'
2288 {
2289 typedefTable.addToEnclosingScope( *$2, TypedefTable::ID );
2290 $$ = DeclarationNode::newTrait( $2, $5, 0 );
2291 }
2292 | TRAIT no_attr_identifier_or_type_name '(' push type_parameter_list pop ')' '{'
2293 {
2294 typedefTable.enterTrait( *$2 );
2295 typedefTable.enterScope();
2296 }
2297 trait_declaration_list '}'
2298 {
2299 typedefTable.leaveTrait();
2300 typedefTable.addToEnclosingScope( *$2, TypedefTable::ID );
2301 $$ = DeclarationNode::newTrait( $2, $5, $10 );
2302 }
2303 ;
2304
2305trait_declaration_list: // CFA
2306 trait_declaration
2307 | trait_declaration_list push trait_declaration
2308 { $$ = $1->appendList( $3 ); }
2309 ;
2310
2311trait_declaration: // CFA
2312 cfa_trait_declaring_list pop ';'
2313 | trait_declaring_list pop ';'
2314 ;
2315
2316cfa_trait_declaring_list: // CFA
2317 cfa_variable_specifier
2318 {
2319 typedefTable.addToEnclosingScope2( TypedefTable::ID );
2320 $$ = $1;
2321 }
2322 | cfa_function_specifier
2323 {
2324 typedefTable.addToEnclosingScope2( TypedefTable::ID );
2325 $$ = $1;
2326 }
2327 | cfa_trait_declaring_list pop ',' push identifier_or_type_name
2328 {
2329 typedefTable.addToEnclosingScope2( *$5, TypedefTable::ID );
2330 $$ = $1->appendList( $1->cloneType( $5 ) );
2331 }
2332 ;
2333
2334trait_declaring_list: // CFA
2335 type_specifier declarator
2336 {
2337 typedefTable.addToEnclosingScope2( TypedefTable::ID );
2338 $$ = $2->addType( $1 );
2339 }
2340 | trait_declaring_list pop ',' push declarator
2341 {
2342 typedefTable.addToEnclosingScope2( TypedefTable::ID );
2343 $$ = $1->appendList( $1->cloneBaseType( $5 ) );
2344 }
2345 ;
2346
2347//***************************** EXTERNAL DEFINITIONS *****************************
2348
2349translation_unit:
2350 // empty
2351 {} // empty input file
2352 | external_definition_list
2353 { parseTree = parseTree ? parseTree->appendList( $1 ) : $1; }
2354 ;
2355
2356external_definition_list:
2357 external_definition
2358 | external_definition_list push external_definition
2359 { $$ = $1 ? $1->appendList( $3 ) : $3; }
2360 ;
2361
2362external_definition_list_opt:
2363 // empty
2364 { $$ = nullptr; }
2365 | external_definition_list
2366 ;
2367
2368external_definition:
2369 declaration
2370 | external_function_definition
2371 | ASM '(' string_literal ')' ';' // GCC, global assembler statement
2372 {
2373 $$ = DeclarationNode::newAsmStmt( new StatementNode( build_asmstmt( false, $3, 0 ) ) );
2374 }
2375 | EXTERN STRINGliteral // C++-style linkage specifier
2376 {
2377 linkageStack.push( linkage ); // handle nested extern "C"/"Cforall"
2378 linkage = LinkageSpec::linkageUpdate( yylloc, linkage, $2 );
2379 }
2380 '{' external_definition_list_opt '}'
2381 {
2382 linkage = linkageStack.top();
2383 linkageStack.pop();
2384 $$ = $5;
2385 }
2386 | EXTENSION external_definition // GCC, multiple __extension__ allowed, meaning unknown
2387 {
2388 distExt( $2 ); // mark all fields in list
2389 $$ = $2;
2390 }
2391 | type_qualifier_list '{' external_definition_list '}' // CFA, namespace
2392 ;
2393
2394external_function_definition:
2395 function_definition
2396 // These rules are a concession to the "implicit int" type_specifier because there is a significant amount of
2397 // legacy code with global functions missing the type-specifier for the return type, and assuming "int".
2398 // Parsing is possible because function_definition does not appear in the context of an expression (nested
2399 // functions preclude this concession, i.e., all nested function must have a return type). A function prototype
2400 // declaration must still have a type_specifier. OBSOLESCENT (see 1)
2401 | function_declarator compound_statement
2402 {
2403 typedefTable.addToEnclosingScope( TypedefTable::ID );
2404 typedefTable.leaveScope();
2405 $$ = $1->addFunctionBody( $2 );
2406 }
2407 | KR_function_declarator KR_declaration_list_opt compound_statement
2408 {
2409 typedefTable.addToEnclosingScope( TypedefTable::ID );
2410 typedefTable.leaveScope();
2411 $$ = $1->addOldDeclList( $2 )->addFunctionBody( $3 );
2412 }
2413 ;
2414
2415with_clause_opt:
2416 // empty
2417 { $$ = nullptr; }
2418 | WITH '(' tuple_expression_list ')'
2419 { $$ = $3; }
2420 ;
2421
2422function_definition:
2423 cfa_function_declaration with_clause_opt compound_statement // CFA
2424 {
2425 typedefTable.addToEnclosingScope( TypedefTable::ID );
2426 typedefTable.leaveScope();
2427 // Add the function body to the last identifier in the function definition list, i.e., foo3:
2428 // [const double] foo1(), foo2( int ), foo3( double ) { return 3.0; }
2429 $1->get_last()->addFunctionBody( $3, $2 );
2430 $$ = $1;
2431 }
2432 | declaration_specifier function_declarator with_clause_opt compound_statement
2433 {
2434 rebindForall( $1, $2 );
2435 typedefTable.addToEnclosingScope( TypedefTable::ID );
2436 typedefTable.leaveScope();
2437 $$ = $2->addFunctionBody( $4, $3 )->addType( $1 );
2438 }
2439 // handles default int return type, OBSOLESCENT (see 1)
2440 | type_qualifier_list function_declarator with_clause_opt compound_statement
2441 {
2442 typedefTable.addToEnclosingScope( TypedefTable::ID );
2443 typedefTable.leaveScope();
2444 $$ = $2->addFunctionBody( $4, $3 )->addQualifiers( $1 );
2445 }
2446 // handles default int return type, OBSOLESCENT (see 1)
2447 | declaration_qualifier_list function_declarator with_clause_opt compound_statement
2448 {
2449 typedefTable.addToEnclosingScope( TypedefTable::ID );
2450 typedefTable.leaveScope();
2451 $$ = $2->addFunctionBody( $4, $3 )->addQualifiers( $1 );
2452 }
2453 // handles default int return type, OBSOLESCENT (see 1)
2454 | declaration_qualifier_list type_qualifier_list function_declarator with_clause_opt compound_statement
2455 {
2456 typedefTable.addToEnclosingScope( TypedefTable::ID );
2457 typedefTable.leaveScope();
2458 $$ = $3->addFunctionBody( $5, $4 )->addQualifiers( $2 )->addQualifiers( $1 );
2459 }
2460
2461 // Old-style K&R function definition, OBSOLESCENT (see 4)
2462 | declaration_specifier KR_function_declarator KR_declaration_list_opt with_clause_opt compound_statement
2463 {
2464 rebindForall( $1, $2 );
2465 typedefTable.addToEnclosingScope( TypedefTable::ID );
2466 typedefTable.leaveScope();
2467 $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addType( $1 );
2468 }
2469 // handles default int return type, OBSOLESCENT (see 1)
2470 | type_qualifier_list KR_function_declarator KR_declaration_list_opt with_clause_opt compound_statement
2471 {
2472 typedefTable.addToEnclosingScope( TypedefTable::ID );
2473 typedefTable.leaveScope();
2474 $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addQualifiers( $1 );
2475 }
2476 // handles default int return type, OBSOLESCENT (see 1)
2477 | declaration_qualifier_list KR_function_declarator KR_declaration_list_opt with_clause_opt compound_statement
2478 {
2479 typedefTable.addToEnclosingScope( TypedefTable::ID );
2480 typedefTable.leaveScope();
2481 $$ = $2->addOldDeclList( $3 )->addFunctionBody( $5, $4 )->addQualifiers( $1 );
2482 }
2483 // handles default int return type, OBSOLESCENT (see 1)
2484 | declaration_qualifier_list type_qualifier_list KR_function_declarator KR_declaration_list_opt with_clause_opt compound_statement
2485 {
2486 typedefTable.addToEnclosingScope( TypedefTable::ID );
2487 typedefTable.leaveScope();
2488 $$ = $3->addOldDeclList( $4 )->addFunctionBody( $6, $5 )->addQualifiers( $2 )->addQualifiers( $1 );
2489 }
2490 ;
2491
2492declarator:
2493 variable_declarator
2494 | variable_type_redeclarator
2495 | function_declarator
2496 ;
2497
2498subrange:
2499 constant_expression '~' constant_expression // CFA, integer subrange
2500 { $$ = new ExpressionNode( new RangeExpr( maybeMoveBuild< Expression >( $1 ), maybeMoveBuild< Expression >( $3 ) ) ); }
2501 ;
2502
2503asm_name_opt: // GCC
2504 // empty
2505 { $$ = nullptr; }
2506 | ASM '(' string_literal ')' attribute_list_opt
2507 {
2508 DeclarationNode * name = new DeclarationNode();
2509 name->asmName = $3;
2510 $$ = name->addQualifiers( $5 );
2511 }
2512 ;
2513
2514attribute_list_opt: // GCC
2515 // empty
2516 { $$ = nullptr; }
2517 | attribute_list
2518 ;
2519
2520attribute_list: // GCC
2521 attribute
2522 | attribute_list attribute
2523 { $$ = $2->addQualifiers( $1 ); }
2524 ;
2525
2526attribute: // GCC
2527 ATTRIBUTE '(' '(' attribute_name_list ')' ')'
2528 { $$ = $4; }
2529 ;
2530
2531attribute_name_list: // GCC
2532 attribute_name
2533 | attribute_name_list ',' attribute_name
2534 { $$ = $3->addQualifiers( $1 ); }
2535 ;
2536
2537attribute_name: // GCC
2538 // empty
2539 { $$ = nullptr; }
2540 | attr_name
2541 { $$ = DeclarationNode::newAttribute( $1 ); }
2542 | attr_name '(' argument_expression_list ')'
2543 { $$ = DeclarationNode::newAttribute( $1, $3 ); }
2544 ;
2545
2546attr_name: // GCC
2547 IDENTIFIER
2548 | quasi_keyword
2549 | TYPEDEFname
2550 | TYPEGENname
2551 | FALLTHROUGH
2552 { $$ = Token{ new string( "fallthrough" ), { nullptr, -1 } }; }
2553 | CONST
2554 { $$ = Token{ new string( "__const__" ), { nullptr, -1 } }; }
2555 ;
2556
2557// ============================================================================
2558// The following sections are a series of grammar patterns used to parse declarators. Multiple patterns are necessary
2559// because the type of an identifier in wrapped around the identifier in the same form as its usage in an expression, as
2560// in:
2561//
2562// int (*f())[10] { ... };
2563// ... (*f())[3] += 1; // definition mimics usage
2564//
2565// Because these patterns are highly recursive, changes at a lower level in the recursion require copying some or all of
2566// the pattern. Each of these patterns has some subtle variation to ensure correct syntax in a particular context.
2567// ============================================================================
2568
2569// ----------------------------------------------------------------------------
2570// The set of valid declarators before a compound statement for defining a function is less than the set of declarators
2571// to define a variable or function prototype, e.g.:
2572//
2573// valid declaration invalid definition
2574// ----------------- ------------------
2575// int f; int f {}
2576// int *f; int *f {}
2577// int f[10]; int f[10] {}
2578// int (*f)(int); int (*f)(int) {}
2579//
2580// To preclude this syntactic anomaly requires separating the grammar rules for variable and function declarators, hence
2581// variable_declarator and function_declarator.
2582// ----------------------------------------------------------------------------
2583
2584// This pattern parses a declaration of a variable that is not redefining a typedef name. The pattern precludes
2585// declaring an array of functions versus a pointer to an array of functions.
2586
2587variable_declarator:
2588 paren_identifier attribute_list_opt
2589 { $$ = $1->addQualifiers( $2 ); }
2590 | variable_ptr
2591 | variable_array attribute_list_opt
2592 { $$ = $1->addQualifiers( $2 ); }
2593 | variable_function attribute_list_opt
2594 { $$ = $1->addQualifiers( $2 ); }
2595 ;
2596
2597paren_identifier:
2598 identifier
2599 {
2600 typedefTable.setNextIdentifier( *$1 );
2601 $$ = DeclarationNode::newName( $1 );
2602 }
2603 | '(' paren_identifier ')' // redundant parenthesis
2604 { $$ = $2; }
2605 ;
2606
2607variable_ptr:
2608 ptrref_operator variable_declarator
2609 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2610 | ptrref_operator type_qualifier_list variable_declarator
2611 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
2612 | '(' variable_ptr ')' attribute_list_opt
2613 { $$ = $2->addQualifiers( $4 ); } // redundant parenthesis
2614 ;
2615
2616variable_array:
2617 paren_identifier array_dimension
2618 { $$ = $1->addArray( $2 ); }
2619 | '(' variable_ptr ')' array_dimension
2620 { $$ = $2->addArray( $4 ); }
2621 | '(' variable_array ')' multi_array_dimension // redundant parenthesis
2622 { $$ = $2->addArray( $4 ); }
2623 | '(' variable_array ')' // redundant parenthesis
2624 { $$ = $2; }
2625 ;
2626
2627variable_function:
2628 '(' variable_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2629 { $$ = $2->addParamList( $6 ); }
2630 | '(' variable_function ')' // redundant parenthesis
2631 { $$ = $2; }
2632 ;
2633
2634// This pattern parses a function declarator that is not redefining a typedef name. For non-nested functions, there is
2635// no context where a function definition can redefine a typedef name, i.e., the typedef and function name cannot exist
2636// is the same scope. The pattern precludes returning arrays and functions versus pointers to arrays and functions.
2637
2638function_declarator:
2639 function_no_ptr attribute_list_opt
2640 { $$ = $1->addQualifiers( $2 ); }
2641 | function_ptr
2642 | function_array attribute_list_opt
2643 { $$ = $1->addQualifiers( $2 ); }
2644 ;
2645
2646function_no_ptr:
2647 paren_identifier '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2648 { $$ = $1->addParamList( $4 ); }
2649 | '(' function_ptr ')' '(' push parameter_type_list_opt pop ')'
2650 { $$ = $2->addParamList( $6 ); }
2651 | '(' function_no_ptr ')' // redundant parenthesis
2652 { $$ = $2; }
2653 ;
2654
2655function_ptr:
2656 ptrref_operator function_declarator
2657 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2658 | ptrref_operator type_qualifier_list function_declarator
2659 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
2660 | '(' function_ptr ')'
2661 { $$ = $2; }
2662 ;
2663
2664function_array:
2665 '(' function_ptr ')' array_dimension
2666 { $$ = $2->addArray( $4 ); }
2667 | '(' function_array ')' multi_array_dimension // redundant parenthesis
2668 { $$ = $2->addArray( $4 ); }
2669 | '(' function_array ')' // redundant parenthesis
2670 { $$ = $2; }
2671 ;
2672
2673// This pattern parses an old-style K&R function declarator (OBSOLESCENT, see 4)
2674//
2675// f( a, b, c ) int a, *b, c[]; {}
2676//
2677// that is not redefining a typedef name (see function_declarator for additional comments). The pattern precludes
2678// returning arrays and functions versus pointers to arrays and functions.
2679
2680KR_function_declarator:
2681 KR_function_no_ptr
2682 | KR_function_ptr
2683 | KR_function_array
2684 ;
2685
2686KR_function_no_ptr:
2687 paren_identifier '(' identifier_list ')' // function_declarator handles empty parameter
2688 { $$ = $1->addIdList( $3 ); }
2689 | '(' KR_function_ptr ')' '(' push parameter_type_list_opt pop ')'
2690 { $$ = $2->addParamList( $6 ); }
2691 | '(' KR_function_no_ptr ')' // redundant parenthesis
2692 { $$ = $2; }
2693 ;
2694
2695KR_function_ptr:
2696 ptrref_operator KR_function_declarator
2697 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2698 | ptrref_operator type_qualifier_list KR_function_declarator
2699 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
2700 | '(' KR_function_ptr ')'
2701 { $$ = $2; }
2702 ;
2703
2704KR_function_array:
2705 '(' KR_function_ptr ')' array_dimension
2706 { $$ = $2->addArray( $4 ); }
2707 | '(' KR_function_array ')' multi_array_dimension // redundant parenthesis
2708 { $$ = $2->addArray( $4 ); }
2709 | '(' KR_function_array ')' // redundant parenthesis
2710 { $$ = $2; }
2711 ;
2712
2713// This pattern parses a declaration for a variable or function prototype that redefines a type name, e.g.:
2714//
2715// typedef int foo;
2716// {
2717// int foo; // redefine typedef name in new scope
2718// }
2719//
2720// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
2721// and functions versus pointers to arrays and functions.
2722
2723variable_type_redeclarator:
2724 paren_type attribute_list_opt
2725 { $$ = $1->addQualifiers( $2 ); }
2726 | type_ptr
2727 | type_array attribute_list_opt
2728 { $$ = $1->addQualifiers( $2 ); }
2729 | type_function attribute_list_opt
2730 { $$ = $1->addQualifiers( $2 ); }
2731 ;
2732
2733paren_type:
2734 typedef
2735 | '(' paren_type ')'
2736 { $$ = $2; }
2737 ;
2738
2739type_ptr:
2740 ptrref_operator variable_type_redeclarator
2741 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2742 | ptrref_operator type_qualifier_list variable_type_redeclarator
2743 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
2744 | '(' type_ptr ')' attribute_list_opt
2745 { $$ = $2->addQualifiers( $4 ); }
2746 ;
2747
2748type_array:
2749 paren_type array_dimension
2750 { $$ = $1->addArray( $2 ); }
2751 | '(' type_ptr ')' array_dimension
2752 { $$ = $2->addArray( $4 ); }
2753 | '(' type_array ')' multi_array_dimension // redundant parenthesis
2754 { $$ = $2->addArray( $4 ); }
2755 | '(' type_array ')' // redundant parenthesis
2756 { $$ = $2; }
2757 ;
2758
2759type_function:
2760 paren_type '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2761 { $$ = $1->addParamList( $4 ); }
2762 | '(' type_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2763 { $$ = $2->addParamList( $6 ); }
2764 | '(' type_function ')' // redundant parenthesis
2765 { $$ = $2; }
2766 ;
2767
2768// This pattern parses a declaration for a parameter variable of a function prototype or actual that is not redefining a
2769// typedef name and allows the C99 array options, which can only appear in a parameter list. The pattern precludes
2770// declaring an array of functions versus a pointer to an array of functions, and returning arrays and functions versus
2771// pointers to arrays and functions.
2772
2773identifier_parameter_declarator:
2774 paren_identifier attribute_list_opt
2775 { $$ = $1->addQualifiers( $2 ); }
2776 | '&' MUTEX paren_identifier attribute_list_opt
2777 { $$ = $3->addPointer( DeclarationNode::newPointer( DeclarationNode::newTypeQualifier( Type::Mutex ), OperKinds::AddressOf ) )->addQualifiers( $4 ); }
2778 | identifier_parameter_ptr
2779 | identifier_parameter_array attribute_list_opt
2780 { $$ = $1->addQualifiers( $2 ); }
2781 | identifier_parameter_function attribute_list_opt
2782 { $$ = $1->addQualifiers( $2 ); }
2783 ;
2784
2785identifier_parameter_ptr:
2786 ptrref_operator identifier_parameter_declarator
2787 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2788 | ptrref_operator type_qualifier_list identifier_parameter_declarator
2789 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
2790 | '(' identifier_parameter_ptr ')' attribute_list_opt
2791 { $$ = $2->addQualifiers( $4 ); }
2792 ;
2793
2794identifier_parameter_array:
2795 paren_identifier array_parameter_dimension
2796 { $$ = $1->addArray( $2 ); }
2797 | '(' identifier_parameter_ptr ')' array_dimension
2798 { $$ = $2->addArray( $4 ); }
2799 | '(' identifier_parameter_array ')' multi_array_dimension // redundant parenthesis
2800 { $$ = $2->addArray( $4 ); }
2801 | '(' identifier_parameter_array ')' // redundant parenthesis
2802 { $$ = $2; }
2803 ;
2804
2805identifier_parameter_function:
2806 paren_identifier '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2807 { $$ = $1->addParamList( $4 ); }
2808 | '(' identifier_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2809 { $$ = $2->addParamList( $6 ); }
2810 | '(' identifier_parameter_function ')' // redundant parenthesis
2811 { $$ = $2; }
2812 ;
2813
2814// This pattern parses a declaration for a parameter variable or function prototype that is redefining a typedef name,
2815// e.g.:
2816//
2817// typedef int foo;
2818// forall( otype T ) struct foo;
2819// int f( int foo ); // redefine typedef name in new scope
2820//
2821// and allows the C99 array options, which can only appear in a parameter list.
2822
2823type_parameter_redeclarator:
2824 typedef attribute_list_opt
2825 { $$ = $1->addQualifiers( $2 ); }
2826 | '&' MUTEX typedef attribute_list_opt
2827 { $$ = $3->addPointer( DeclarationNode::newPointer( DeclarationNode::newTypeQualifier( Type::Mutex ), OperKinds::AddressOf ) )->addQualifiers( $4 ); }
2828 | type_parameter_ptr
2829 | type_parameter_array attribute_list_opt
2830 { $$ = $1->addQualifiers( $2 ); }
2831 | type_parameter_function attribute_list_opt
2832 { $$ = $1->addQualifiers( $2 ); }
2833 ;
2834
2835typedef:
2836 TYPEDEFname
2837 {
2838 typedefTable.setNextIdentifier( *$1 );
2839 $$ = DeclarationNode::newName( $1 );
2840 }
2841 | TYPEGENname
2842 {
2843 typedefTable.setNextIdentifier( *$1 );
2844 $$ = DeclarationNode::newName( $1 );
2845 }
2846 ;
2847
2848type_parameter_ptr:
2849 ptrref_operator type_parameter_redeclarator
2850 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2851 | ptrref_operator type_qualifier_list type_parameter_redeclarator
2852 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
2853 | '(' type_parameter_ptr ')' attribute_list_opt
2854 { $$ = $2->addQualifiers( $4 ); }
2855 ;
2856
2857type_parameter_array:
2858 typedef array_parameter_dimension
2859 { $$ = $1->addArray( $2 ); }
2860 | '(' type_parameter_ptr ')' array_parameter_dimension
2861 { $$ = $2->addArray( $4 ); }
2862 ;
2863
2864type_parameter_function:
2865 typedef '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2866 { $$ = $1->addParamList( $4 ); }
2867 | '(' type_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2868 { $$ = $2->addParamList( $6 ); }
2869 ;
2870
2871// This pattern parses a declaration of an abstract variable or function prototype, i.e., there is no identifier to
2872// which the type applies, e.g.:
2873//
2874// sizeof( int );
2875// sizeof( int * );
2876// sizeof( int [10] );
2877// sizeof( int (*)() );
2878// sizeof( int () );
2879//
2880// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
2881// and functions versus pointers to arrays and functions.
2882
2883abstract_declarator:
2884 abstract_ptr
2885 | abstract_array attribute_list_opt
2886 { $$ = $1->addQualifiers( $2 ); }
2887 | abstract_function attribute_list_opt
2888 { $$ = $1->addQualifiers( $2 ); }
2889 ;
2890
2891abstract_ptr:
2892 ptrref_operator
2893 { $$ = DeclarationNode::newPointer( 0, $1 ); }
2894 | ptrref_operator type_qualifier_list
2895 { $$ = DeclarationNode::newPointer( $2, $1 ); }
2896 | ptrref_operator abstract_declarator
2897 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2898 | ptrref_operator type_qualifier_list abstract_declarator
2899 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
2900 | '(' abstract_ptr ')' attribute_list_opt
2901 { $$ = $2->addQualifiers( $4 ); }
2902 ;
2903
2904abstract_array:
2905 array_dimension
2906 | '(' abstract_ptr ')' array_dimension
2907 { $$ = $2->addArray( $4 ); }
2908 | '(' abstract_array ')' multi_array_dimension // redundant parenthesis
2909 { $$ = $2->addArray( $4 ); }
2910 | '(' abstract_array ')' // redundant parenthesis
2911 { $$ = $2; }
2912 ;
2913
2914abstract_function:
2915 '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2916 { $$ = DeclarationNode::newFunction( nullptr, nullptr, $3, nullptr ); }
2917 | '(' abstract_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2918 { $$ = $2->addParamList( $6 ); }
2919 | '(' abstract_function ')' // redundant parenthesis
2920 { $$ = $2; }
2921 ;
2922
2923array_dimension:
2924 // Only the first dimension can be empty.
2925 '[' ']'
2926 { $$ = DeclarationNode::newArray( 0, 0, false ); }
2927 | '[' ']' multi_array_dimension
2928 { $$ = DeclarationNode::newArray( 0, 0, false )->addArray( $3 ); }
2929 | multi_array_dimension
2930 ;
2931
2932multi_array_dimension:
2933 '[' push assignment_expression pop ']'
2934 { $$ = DeclarationNode::newArray( $3, 0, false ); }
2935 | '[' push '*' pop ']' // C99
2936 { $$ = DeclarationNode::newVarArray( 0 ); }
2937 | multi_array_dimension '[' push assignment_expression pop ']'
2938 { $$ = $1->addArray( DeclarationNode::newArray( $4, 0, false ) ); }
2939 | multi_array_dimension '[' push '*' pop ']' // C99
2940 { $$ = $1->addArray( DeclarationNode::newVarArray( 0 ) ); }
2941 ;
2942
2943// This pattern parses a declaration of a parameter abstract variable or function prototype, i.e., there is no
2944// identifier to which the type applies, e.g.:
2945//
2946// int f( int ); // not handled here
2947// int f( int * ); // abstract function-prototype parameter; no parameter name specified
2948// int f( int (*)() ); // abstract function-prototype parameter; no parameter name specified
2949// int f( int (int) ); // abstract function-prototype parameter; no parameter name specified
2950//
2951// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
2952// and functions versus pointers to arrays and functions. In addition, the pattern handles the
2953// special meaning of parenthesis around a typedef name:
2954//
2955// ISO/IEC 9899:1999 Section 6.7.5.3(11) : "In a parameter declaration, a single typedef name in
2956// parentheses is taken to be an abstract declarator that specifies a function with a single parameter,
2957// not as redundant parentheses around the identifier."
2958//
2959// For example:
2960//
2961// typedef float T;
2962// int f( int ( T [5] ) ); // see abstract_parameter_declarator
2963// int g( int ( T ( int ) ) ); // see abstract_parameter_declarator
2964// int f( int f1( T a[5] ) ); // see identifier_parameter_declarator
2965// int g( int g1( T g2( int p ) ) ); // see identifier_parameter_declarator
2966//
2967// In essence, a '(' immediately to the left of typedef name, T, is interpreted as starting a parameter type list, and
2968// not as redundant parentheses around a redeclaration of T. Finally, the pattern also precludes declaring an array of
2969// functions versus a pointer to an array of functions, and returning arrays and functions versus pointers to arrays and
2970// functions.
2971
2972abstract_parameter_declarator:
2973 abstract_parameter_ptr
2974 | '&' MUTEX attribute_list_opt
2975 { $$ = DeclarationNode::newPointer( DeclarationNode::newTypeQualifier( Type::Mutex ), OperKinds::AddressOf )->addQualifiers( $3 ); }
2976 | abstract_parameter_array attribute_list_opt
2977 { $$ = $1->addQualifiers( $2 ); }
2978 | abstract_parameter_function attribute_list_opt
2979 { $$ = $1->addQualifiers( $2 ); }
2980 ;
2981
2982abstract_parameter_ptr:
2983 ptrref_operator
2984 { $$ = DeclarationNode::newPointer( nullptr, $1 ); }
2985 | ptrref_operator type_qualifier_list
2986 { $$ = DeclarationNode::newPointer( $2, $1 ); }
2987 | ptrref_operator abstract_parameter_declarator
2988 { $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
2989 | ptrref_operator type_qualifier_list abstract_parameter_declarator
2990 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
2991 | '(' abstract_parameter_ptr ')' attribute_list_opt
2992 { $$ = $2->addQualifiers( $4 ); }
2993 ;
2994
2995abstract_parameter_array:
2996 array_parameter_dimension
2997 | '(' abstract_parameter_ptr ')' array_parameter_dimension
2998 { $$ = $2->addArray( $4 ); }
2999 | '(' abstract_parameter_array ')' multi_array_dimension // redundant parenthesis
3000 { $$ = $2->addArray( $4 ); }
3001 | '(' abstract_parameter_array ')' // redundant parenthesis
3002 { $$ = $2; }
3003 ;
3004
3005abstract_parameter_function:
3006 '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3007 { $$ = DeclarationNode::newFunction( nullptr, nullptr, $3, nullptr ); }
3008 | '(' abstract_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3009 { $$ = $2->addParamList( $6 ); }
3010 | '(' abstract_parameter_function ')' // redundant parenthesis
3011 { $$ = $2; }
3012 ;
3013
3014array_parameter_dimension:
3015 // Only the first dimension can be empty or have qualifiers.
3016 array_parameter_1st_dimension
3017 | array_parameter_1st_dimension multi_array_dimension
3018 { $$ = $1->addArray( $2 ); }
3019 | multi_array_dimension
3020 ;
3021
3022// The declaration of an array parameter has additional syntax over arrays in normal variable declarations:
3023//
3024// ISO/IEC 9899:1999 Section 6.7.5.2(1) : "The optional type qualifiers and the keyword static shall appear only in
3025// a declaration of a function parameter with an array type, and then only in the outermost array type derivation."
3026
3027array_parameter_1st_dimension:
3028 '[' ']'
3029 { $$ = DeclarationNode::newArray( 0, 0, false ); }
3030 // multi_array_dimension handles the '[' '*' ']' case
3031 | '[' push type_qualifier_list '*' pop ']' // remaining C99
3032 { $$ = DeclarationNode::newVarArray( $3 ); }
3033 | '[' push type_qualifier_list pop ']'
3034 { $$ = DeclarationNode::newArray( 0, $3, false ); }
3035 // multi_array_dimension handles the '[' assignment_expression ']' case
3036 | '[' push type_qualifier_list assignment_expression pop ']'
3037 { $$ = DeclarationNode::newArray( $4, $3, false ); }
3038 | '[' push STATIC type_qualifier_list_opt assignment_expression pop ']'
3039 { $$ = DeclarationNode::newArray( $5, $4, true ); }
3040 | '[' push type_qualifier_list STATIC assignment_expression pop ']'
3041 { $$ = DeclarationNode::newArray( $5, $3, true ); }
3042 ;
3043
3044// This pattern parses a declaration of an abstract variable, but does not allow "int ()" for a function pointer.
3045//
3046// struct S {
3047// int;
3048// int *;
3049// int [10];
3050// int (*)();
3051// };
3052
3053variable_abstract_declarator:
3054 variable_abstract_ptr
3055 | variable_abstract_array attribute_list_opt
3056 { $$ = $1->addQualifiers( $2 ); }
3057 | variable_abstract_function attribute_list_opt
3058 { $$ = $1->addQualifiers( $2 ); }
3059 ;
3060
3061variable_abstract_ptr:
3062 ptrref_operator
3063 { $$ = DeclarationNode::newPointer( 0, $1 ); }
3064 | ptrref_operator type_qualifier_list
3065 { $$ = DeclarationNode::newPointer( $2, $1 ); }
3066 | ptrref_operator variable_abstract_declarator
3067 { $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3068 | ptrref_operator type_qualifier_list variable_abstract_declarator
3069 { $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
3070 | '(' variable_abstract_ptr ')' attribute_list_opt
3071 { $$ = $2->addQualifiers( $4 ); }
3072 ;
3073
3074variable_abstract_array:
3075 array_dimension
3076 | '(' variable_abstract_ptr ')' array_dimension
3077 { $$ = $2->addArray( $4 ); }
3078 | '(' variable_abstract_array ')' multi_array_dimension // redundant parenthesis
3079 { $$ = $2->addArray( $4 ); }
3080 | '(' variable_abstract_array ')' // redundant parenthesis
3081 { $$ = $2; }
3082 ;
3083
3084variable_abstract_function:
3085 '(' variable_abstract_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
3086 { $$ = $2->addParamList( $6 ); }
3087 | '(' variable_abstract_function ')' // redundant parenthesis
3088 { $$ = $2; }
3089 ;
3090
3091// This pattern parses a new-style declaration for a parameter variable or function prototype that is either an
3092// identifier or typedef name and allows the C99 array options, which can only appear in a parameter list.
3093
3094cfa_identifier_parameter_declarator_tuple: // CFA
3095 cfa_identifier_parameter_declarator_no_tuple
3096 | cfa_abstract_tuple
3097 | type_qualifier_list cfa_abstract_tuple
3098 { $$ = $2->addQualifiers( $1 ); }
3099 ;
3100
3101cfa_identifier_parameter_declarator_no_tuple: // CFA
3102 cfa_identifier_parameter_ptr
3103 | cfa_identifier_parameter_array
3104 ;
3105
3106cfa_identifier_parameter_ptr: // CFA
3107 // No SUE declaration in parameter list.
3108 ptrref_operator type_specifier_nobody
3109 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3110 | type_qualifier_list ptrref_operator type_specifier_nobody
3111 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3112 | ptrref_operator cfa_abstract_function
3113 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3114 | type_qualifier_list ptrref_operator cfa_abstract_function
3115 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3116 | ptrref_operator cfa_identifier_parameter_declarator_tuple
3117 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3118 | type_qualifier_list ptrref_operator cfa_identifier_parameter_declarator_tuple
3119 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3120 ;
3121
3122cfa_identifier_parameter_array: // CFA
3123 // Only the first dimension can be empty or have qualifiers. Empty dimension must be factored out due to
3124 // shift/reduce conflict with new-style empty (void) function return type.
3125 '[' ']' type_specifier_nobody
3126 { $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
3127 | cfa_array_parameter_1st_dimension type_specifier_nobody
3128 { $$ = $2->addNewArray( $1 ); }
3129 | '[' ']' multi_array_dimension type_specifier_nobody
3130 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
3131 | cfa_array_parameter_1st_dimension multi_array_dimension type_specifier_nobody
3132 { $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
3133 | multi_array_dimension type_specifier_nobody
3134 { $$ = $2->addNewArray( $1 ); }
3135
3136 | '[' ']' cfa_identifier_parameter_ptr
3137 { $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
3138 | cfa_array_parameter_1st_dimension cfa_identifier_parameter_ptr
3139 { $$ = $2->addNewArray( $1 ); }
3140 | '[' ']' multi_array_dimension cfa_identifier_parameter_ptr
3141 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
3142 | cfa_array_parameter_1st_dimension multi_array_dimension cfa_identifier_parameter_ptr
3143 { $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
3144 | multi_array_dimension cfa_identifier_parameter_ptr
3145 { $$ = $2->addNewArray( $1 ); }
3146 ;
3147
3148cfa_array_parameter_1st_dimension:
3149 '[' push type_qualifier_list '*' pop ']' // remaining C99
3150 { $$ = DeclarationNode::newVarArray( $3 ); }
3151 | '[' push type_qualifier_list assignment_expression pop ']'
3152 { $$ = DeclarationNode::newArray( $4, $3, false ); }
3153 | '[' push declaration_qualifier_list assignment_expression pop ']'
3154 // declaration_qualifier_list must be used because of shift/reduce conflict with
3155 // assignment_expression, so a semantic check is necessary to preclude them as a type_qualifier cannot
3156 // appear in this context.
3157 { $$ = DeclarationNode::newArray( $4, $3, true ); }
3158 | '[' push declaration_qualifier_list type_qualifier_list assignment_expression pop ']'
3159 { $$ = DeclarationNode::newArray( $5, $4->addQualifiers( $3 ), true ); }
3160 ;
3161
3162// This pattern parses a new-style declaration of an abstract variable or function prototype, i.e., there is no
3163// identifier to which the type applies, e.g.:
3164//
3165// [int] f( int ); // abstract variable parameter; no parameter name specified
3166// [int] f( [int] (int) ); // abstract function-prototype parameter; no parameter name specified
3167//
3168// These rules need LR(3):
3169//
3170// cfa_abstract_tuple identifier_or_type_name
3171// '[' cfa_parameter_list ']' identifier_or_type_name '(' cfa_parameter_type_list_opt ')'
3172//
3173// since a function return type can be syntactically identical to a tuple type:
3174//
3175// [int, int] t;
3176// [int, int] f( int );
3177//
3178// Therefore, it is necessary to look at the token after identifier_or_type_name to know when to reduce
3179// cfa_abstract_tuple. To make this LR(1), several rules have to be flattened (lengthened) to allow the necessary
3180// lookahead. To accomplish this, cfa_abstract_declarator has an entry point without tuple, and tuple declarations are
3181// duplicated when appearing with cfa_function_specifier.
3182
3183cfa_abstract_declarator_tuple: // CFA
3184 cfa_abstract_tuple
3185 | type_qualifier_list cfa_abstract_tuple
3186 { $$ = $2->addQualifiers( $1 ); }
3187 | cfa_abstract_declarator_no_tuple
3188 ;
3189
3190cfa_abstract_declarator_no_tuple: // CFA
3191 cfa_abstract_ptr
3192 | cfa_abstract_array
3193 ;
3194
3195cfa_abstract_ptr: // CFA
3196 ptrref_operator type_specifier
3197 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3198 | type_qualifier_list ptrref_operator type_specifier
3199 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3200 | ptrref_operator cfa_abstract_function
3201 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3202 | type_qualifier_list ptrref_operator cfa_abstract_function
3203 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3204 | ptrref_operator cfa_abstract_declarator_tuple
3205 { $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
3206 | type_qualifier_list ptrref_operator cfa_abstract_declarator_tuple
3207 { $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
3208 ;
3209
3210cfa_abstract_array: // CFA
3211 // Only the first dimension can be empty. Empty dimension must be factored out due to shift/reduce conflict with
3212 // empty (void) function return type.
3213 '[' ']' type_specifier
3214 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
3215 | '[' ']' multi_array_dimension type_specifier
3216 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
3217 | multi_array_dimension type_specifier
3218 { $$ = $2->addNewArray( $1 ); }
3219 | '[' ']' cfa_abstract_ptr
3220 { $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
3221 | '[' ']' multi_array_dimension cfa_abstract_ptr
3222 { $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
3223 | multi_array_dimension cfa_abstract_ptr
3224 { $$ = $2->addNewArray( $1 ); }
3225 ;
3226
3227cfa_abstract_tuple: // CFA
3228 '[' push cfa_abstract_parameter_list pop ']'
3229 { $$ = DeclarationNode::newTuple( $3 ); }
3230 ;
3231
3232cfa_abstract_function: // CFA
3233// '[' ']' '(' cfa_parameter_type_list_opt ')'
3234// { $$ = DeclarationNode::newFunction( nullptr, DeclarationNode::newTuple( nullptr ), $4, nullptr ); }
3235 cfa_abstract_tuple '(' push cfa_parameter_type_list_opt pop ')'
3236 { $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
3237 | cfa_function_return '(' push cfa_parameter_type_list_opt pop ')'
3238 { $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
3239 ;
3240
3241// 1) ISO/IEC 9899:1999 Section 6.7.2(2) : "At least one type specifier shall be given in the declaration specifiers in
3242// each declaration, and in the specifier-qualifier list in each structure declaration and type name."
3243//
3244// 2) ISO/IEC 9899:1999 Section 6.11.5(1) : "The placement of a storage-class specifier other than at the beginning of
3245// the declaration specifiers in a declaration is an obsolescent feature."
3246//
3247// 3) ISO/IEC 9899:1999 Section 6.11.6(1) : "The use of function declarators with empty parentheses (not
3248// prototype-format parameter type declarators) is an obsolescent feature."
3249//
3250// 4) ISO/IEC 9899:1999 Section 6.11.7(1) : "The use of function definitions with separate parameter identifier and
3251// declaration lists (not prototype-format parameter type and identifier declarators) is an obsolescent feature.
3252
3253//************************* MISCELLANEOUS ********************************
3254
3255comma_opt: // redundant comma
3256 // empty
3257 | ','
3258 ;
3259
3260default_initialize_opt:
3261 // empty
3262 { $$ = nullptr; }
3263 | '=' assignment_expression
3264 { $$ = $2; }
3265 ;
3266
3267%%
3268// ----end of grammar----
3269
3270// Local Variables: //
3271// mode: c++ //
3272// tab-width: 4 //
3273// compile-command: "make install" //
3274// End: //
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