Context Navigation

parser.yy.new @ c0aa336

ADTaaron-thesisarm-ehast-experimentalcleanup-dtorsdeferred_resndemanglerenumforall-pointer-decayjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-exprnew-envno_listpersistent-indexerpthread-emulationqualifiedEnumresolv-newwith_gc

Last change on this file since c0aa336 was c0aa336, checked in by Peter A. Buhr <pabuhr@…>, 7 years ago
third attempt at gcc attributes
Property mode set to `100644`
File size: 107.1 KB

Line
1	//
2	// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
3	//
4	// The contents of this file are covered under the licence agreement in the
5	// file "LICENCE" distributed with Cforall.
6	//
7	// cfa.y --
8	//
9	// Author : Peter A. Buhr
10	// Created On : Sat Sep 1 20:22:55 2001
11	// Last Modified By : Peter A. Buhr
12	// Last Modified On : Sat Feb 4 19:15:25 2017
13	// Update Count : 2318
14	//
15
16	// This grammar is based on the ANSI99/11 C grammar, specifically parts of EXPRESSION and STATEMENTS, and on the C
17	// grammar by James A. Roskind, specifically parts of DECLARATIONS and EXTERNAL DEFINITIONS. While parts have been
18	// copied, important changes have been made in all sections; these changes are sufficient to constitute a new grammar.
19	// In particular, this grammar attempts to be more syntactically precise, i.e., it parses less incorrect language syntax
20	// that must be subsequently rejected by semantic checks. Nevertheless, there are still several semantic checks
21	// required and many are noted in the grammar. Finally, the grammar is extended with GCC and CFA language extensions.
22
23	// Acknowledgments to Richard Bilson, Glen Ditchfield, and Rodolfo Gabriel Esteves who all helped when I got stuck with
24	// the grammar.
25
26	// The root language for this grammar is ANSI99/11 C. All of ANSI99/11 is parsed, except for:
27	//
28	// 1. designation with '=' (use ':' instead)
29	//
30	// Most of the syntactic extensions from ANSI90 to ANSI11 C are marked with the comment "C99/C11". This grammar also has
31	// two levels of extensions. The first extensions cover most of the GCC C extensions, except for:
32	//
33	// 1. designation with and without '=' (use ':' instead)
34	// 2. attributes not allowed in parenthesis of declarator
35	//
36	// All of the syntactic extensions for GCC C are marked with the comment "GCC". The second extensions are for Cforall
37	// (CFA), which fixes several of C's outstanding problems and extends C with many modern language concepts. All of the
38	// syntactic extensions for CFA C are marked with the comment "CFA". As noted above, there is one unreconcileable
39	// parsing problem between C99 and CFA with respect to designators; this is discussed in detail before the "designation"
40	// grammar rule.
41
42	%{
43	#define YYDEBUG_LEXER_TEXT (yylval) // lexer loads this up each time
44	#define YYDEBUG 1 // get the pretty debugging code to compile
45
46	#undef __GNUC_MINOR__
47
48	#include <cstdio>
49	#include <stack>
50	#include "lex.h"
51	#include "parser.h"
52	#include "ParseNode.h"
53	#include "TypedefTable.h"
54	#include "TypeData.h"
55	#include "LinkageSpec.h"
56	using namespace std;
57
58	extern DeclarationNode * parseTree;
59	extern LinkageSpec::Spec linkage;
60	extern TypedefTable typedefTable;
61
62	stack< LinkageSpec::Spec > linkageStack;
63
64	void appendStr( string to, string from ) {
65	// "abc" "def" "ghi" => "abcdefghi", remove new text from quotes and insert before last quote in old string.
66	to->insert( to->length() - 1, from->substr( 1, from->length() - 2 ) );
67	} // appendStr
68
69	DeclarationNode * distAttr( DeclarationNode * specifier, DeclarationNode * declList ) {
70	// distribute declaration_specifier across all declared variables, e.g., static, const, __attribute__.
71	DeclarationNode * cur = declList, * cl = specifier->clone();
72	cur->addType( specifier );
73	for ( cur = dynamic_cast< DeclarationNode * >( cur->get_next() ); cur != nullptr; cur = dynamic_cast< DeclarationNode * >( cur->get_next() ) ) {
74	cl->cloneBaseType( cur );
75	} // for
76	delete cl;
77	return declList;
78	} // distAttr
79
80	void distExt( DeclarationNode * declaration ) {
81	// distribute EXTENSION across all declarations.
82	for ( DeclarationNode iter = declaration; iter != nullptr; iter = (DeclarationNode )iter->get_next() ) {
83	iter->set_extension( true );
84	} // for
85	} // distExt
86	%}
87
88	//*********************** TERMINAL TOKENS ******************************
89
90	// keywords
91	%token TYPEDEF
92	%token AUTO EXTERN REGISTER STATIC
93	%token INLINE // C99
94	%token FORTRAN // C99, extension ISO/IEC 9899:1999 Section J.5.9(1)
95	%token CONST VOLATILE
96	%token RESTRICT // C99
97	%token FORALL LVALUE // CFA
98	%token VOID CHAR SHORT INT LONG FLOAT DOUBLE SIGNED UNSIGNED ZERO_T ONE_T
99	%token VALIST // GCC
100	%token BOOL COMPLEX IMAGINARY // C99
101	%token TYPEOF LABEL // GCC
102	%token ENUM STRUCT UNION
103	%token OTYPE FTYPE DTYPE TTYPE TRAIT // CFA
104	%token SIZEOF OFFSETOF
105	%token ATTRIBUTE EXTENSION // GCC
106	%token IF ELSE SWITCH CASE DEFAULT DO WHILE FOR BREAK CONTINUE GOTO RETURN
107	%token CHOOSE DISABLE ENABLE FALLTHRU TRY CATCH CATCHRESUME FINALLY THROW THROWRESUME AT // CFA
108	%token ASM // C99, extension ISO/IEC 9899:1999 Section J.5.10(1)
109	%token ALIGNAS ALIGNOF ATOMIC GENERIC NORETURN STATICASSERT THREADLOCAL // C11
110
111	// names and constants: lexer differentiates between identifier and typedef names
112	%token<tok> IDENTIFIER QUOTED_IDENTIFIER TYPEDEFname TYPEGENname
113	%token<tok> ATTR_IDENTIFIER ATTR_TYPEDEFname ATTR_TYPEGENname
114	%token<tok> INTEGERconstant CHARACTERconstant STRINGliteral
115	// Floating point constant is broken into three kinds of tokens because of the ambiguity with tuple indexing and
116	// overloading constants 0/1, e.g., x.1 is lexed as (x)(.1), where (.1) is a factional constant, but is semantically
117	// converted into the tuple index (.)(1). e.g., 3.x
118	%token<tok> REALDECIMALconstant REALFRACTIONconstant FLOATINGconstant
119	%token<tok> ZERO ONE // CFA
120
121	// multi-character operators
122	%token ARROW // ->
123	%token ICR DECR // ++ --
124	%token LS RS // << >>
125	%token LE GE EQ NE // <= >= == !=
126	%token ANDAND OROR // && \|\|
127	%token ELLIPSIS // ...
128
129	%token MULTassign DIVassign MODassign // *= /= %=/
130	%token PLUSassign MINUSassign // += -=
131	%token LSassign RSassign // <<= >>=
132	%token ANDassign ERassign ORassign // &= ^= \|=
133
134	%token ATassign // @=
135
136	// Types declaration
137	%union
138	{
139	Token tok;
140	ParseNode * pn;
141	ExpressionNode * en;
142	DeclarationNode * decl;
143	DeclarationNode::Aggregate aggKey;
144	DeclarationNode::TypeClass tclass;
145	StatementNode * sn;
146	ConstantExpr * constant;
147	ForCtl * fctl;
148	LabelNode * label;
149	InitializerNode * in;
150	OperKinds op;
151	std::string * str;
152	bool flag;
153	}
154
155	%type<tok> identifier no_01_identifier no_attr_identifier zero_one
156	%type<tok> identifier_or_type_name no_attr_identifier_or_type_name no_01_identifier_or_type_name attr_name
157	%type<constant> string_literal
158	%type<str> string_literal_list
159
160	// expressions
161	%type<en> constant
162	%type<en> tuple tuple_expression_list
163	%type<op> ptrref_operator unary_operator assignment_operator
164	%type<en> primary_expression postfix_expression unary_expression
165	%type<en> cast_expression multiplicative_expression additive_expression shift_expression
166	%type<en> relational_expression equality_expression AND_expression exclusive_OR_expression
167	%type<en> inclusive_OR_expression logical_AND_expression logical_OR_expression conditional_expression
168	%type<en> constant_expression assignment_expression assignment_expression_opt
169	%type<en> comma_expression comma_expression_opt
170	%type<en> argument_expression_list argument_expression assignment_opt
171	%type<fctl> for_control_expression
172	%type<en> subrange
173	%type<decl> asm_name_opt
174	%type<en> asm_operands_opt asm_operands_list asm_operand
175	%type<label> label_list
176	%type<en> asm_clobbers_list_opt
177	%type<flag> asm_volatile_opt
178
179	// statements
180	%type<sn> labeled_statement compound_statement expression_statement selection_statement
181	%type<sn> iteration_statement jump_statement exception_statement asm_statement
182	%type<sn> fall_through_opt fall_through
183	%type<sn> statement statement_list
184	%type<sn> block_item_list block_item
185	%type<sn> case_clause
186	%type<en> case_value
187	%type<sn> case_value_list case_label case_label_list
188	%type<sn> switch_clause_list_opt switch_clause_list choose_clause_list_opt choose_clause_list
189	%type<sn> handler_list handler_clause finally_clause
190
191	// declarations
192	%type<decl> abstract_declarator abstract_ptr abstract_array abstract_function array_dimension multi_array_dimension
193	%type<decl> abstract_parameter_declarator abstract_parameter_ptr abstract_parameter_array abstract_parameter_function array_parameter_dimension array_parameter_1st_dimension
194	%type<decl> abstract_parameter_declaration
195
196	%type<aggKey> aggregate_key
197	%type<decl> aggregate_type
198
199	%type<decl> assertion assertion_list_opt
200
201	%type<en> bit_subrange_size_opt bit_subrange_size
202
203	%type<decl> basic_declaration_specifier basic_type_name basic_type_specifier direct_type_name indirect_type_name
204
205	%type<decl> trait_declaration trait_declaration_list trait_declaring_list trait_specifier
206
207	%type<decl> declaration declaration_list declaration_list_opt declaration_qualifier_list
208	%type<decl> declaration_specifier declarator declaring_list
209
210	%type<decl> elaborated_type
211
212	%type<decl> enumerator_list enum_type
213	%type<en> enumerator_value_opt
214
215	%type<decl> exception_declaration external_definition external_definition_list external_definition_list_opt
216
217	%type<decl> field_declaration field_declaration_list field_declarator field_declaring_list
218	%type<en> field field_list field_name fraction_constants
219
220	%type<decl> external_function_definition function_definition function_array function_declarator function_no_ptr function_ptr
221
222	%type<decl> identifier_parameter_array identifier_parameter_declarator identifier_parameter_function
223	%type<decl> identifier_parameter_ptr identifier_list
224
225	%type<decl> cfa_abstract_array cfa_abstract_declarator_no_tuple cfa_abstract_declarator_tuple
226	%type<decl> cfa_abstract_function cfa_abstract_parameter_declaration cfa_abstract_parameter_list
227	%type<decl> cfa_abstract_ptr cfa_abstract_tuple
228
229	%type<decl> cfa_array_parameter_1st_dimension
230
231	%type<decl> cfa_trait_declaring_list cfa_declaration cfa_field_declaring_list
232	%type<decl> cfa_function_declaration cfa_function_return cfa_function_specifier
233
234	%type<decl> cfa_identifier_parameter_array cfa_identifier_parameter_declarator_no_tuple
235	%type<decl> cfa_identifier_parameter_declarator_tuple cfa_identifier_parameter_ptr
236
237	%type<decl> cfa_parameter_declaration cfa_parameter_list cfa_parameter_type_list cfa_parameter_type_list_opt
238
239	%type<decl> cfa_typedef_declaration cfa_variable_declaration cfa_variable_specifier
240
241	%type<decl> c_declaration
242	%type<decl> KR_function_declarator KR_function_no_ptr KR_function_ptr KR_function_array
243	%type<decl> KR_declaration_list KR_declaration_list_opt
244
245	%type<decl> parameter_declaration parameter_list parameter_type_list
246	%type<decl> parameter_type_list_opt
247
248	%type<decl> paren_identifier paren_type
249
250	%type<decl> storage_class storage_class_list
251
252	%type<decl> sue_declaration_specifier sue_type_specifier
253
254	%type<tclass> type_class
255	%type<decl> type_declarator type_declarator_name type_declaring_list
256
257	%type<decl> typedef typedef_type_specifier typedef_declaration typedef_declaration_specifier typedef_expression
258
259	%type<decl> variable_type_redeclarator type_ptr type_array type_function
260
261	%type<decl> type_parameter_redeclarator type_parameter_ptr type_parameter_array type_parameter_function
262	%type<decl> typegen_declaration_specifier typegen_type_specifier typegen_name
263
264	%type<decl> type_name type_name_no_function
265	%type<decl> type_parameter type_parameter_list
266
267	%type<en> type_name_list
268
269	%type<decl> type_qualifier type_qualifier_name type_qualifier_list type_qualifier_list_opt type_specifier
270
271	%type<decl> variable_declarator variable_ptr variable_array variable_function
272	%type<decl> variable_abstract_declarator variable_abstract_ptr variable_abstract_array variable_abstract_function
273
274	%type<decl> attribute_list_opt attribute_list attribute_name_list attribute attribute_name
275
276	%type<flag> extension_opt
277
278	// initializers
279	%type<in> initializer initializer_list initializer_opt
280
281	// designators
282	%type<en> designator designator_list designation
283
284
285	// Handle single shift/reduce conflict for dangling else by shifting the ELSE token. For example, this string
286	// is ambiguous:
287	// .---------. matches IF '(' comma_expression ')' statement
288	// if ( C ) S1 else S2
289	// `-----------------' matches IF '(' comma_expression ')' statement ELSE statement */
290
291	%nonassoc THEN // rule precedence for IF '(' comma_expression ')' statement
292	%nonassoc ELSE // token precedence for start of else clause in IF statement
293
294	%start translation_unit // parse-tree root
295
296	%%
297	//*********************** Namespace Management ******************************
298
299	// The grammar in the ANSI C standard is not strictly context-free, since it relies upon the distinct terminal symbols
300	// "identifier" and "TYPEDEFname" that are lexically identical. While it is possible to write a purely context-free
301	// grammar, such a grammar would obscure the relationship between syntactic and semantic constructs. Hence, this
302	// grammar uses the ANSI style.
303	//
304	// Cforall compounds this problem by introducing type names local to the scope of a declaration (for instance, those
305	// introduced through "forall" qualifiers), and by introducing "type generators" -- parameterized types. This latter
306	// type name creates a third class of identifiers that must be distinguished by the scanner.
307	//
308	// Since the scanner cannot distinguish among the different classes of identifiers without some context information, it
309	// accesses a data structure (TypedefTable) to allow classification of an identifier that it has just read. Semantic
310	// actions during the parser update this data structure when the class of identifiers change.
311	//
312	// Because the Cforall language is block-scoped, there is the possibility that an identifier can change its class in a
313	// local scope; it must revert to its original class at the end of the block. Since type names can be local to a
314	// particular declaration, each declaration is itself a scope. This requires distinguishing between type names that are
315	// local to the current declaration scope and those that persist past the end of the declaration (i.e., names defined in
316	// "typedef" or "otype" declarations).
317	//
318	// The non-terminals "push" and "pop" derive the empty string; their only use is to denote the opening and closing of
319	// scopes. Every push must have a matching pop, although it is regrettable the matching pairs do not always occur
320	// within the same rule. These non-terminals may appear in more contexts than strictly necessary from a semantic point
321	// of view. Unfortunately, these extra rules are necessary to prevent parsing conflicts -- the parser may not have
322	// enough context and look-ahead information to decide whether a new scope is necessary, so the effect of these extra
323	// rules is to open a new scope unconditionally. As the grammar evolves, it may be neccesary to add or move around
324	// "push" and "pop" nonterminals to resolve conflicts of this sort.
325
326	push:
327	{ typedefTable.enterScope(); }
328	;
329
330	pop:
331	{ typedefTable.leaveScope(); }
332	;
333
334	//*********************** CONSTANTS ******************************
335
336	constant:
337	// ENUMERATIONconstant is not included here; it is treated as a variable with type "enumeration constant".
338	INTEGERconstant { $$ = new ExpressionNode( build_constantInteger( *$1 ) ); }
339	\| REALDECIMALconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); }
340	\| REALFRACTIONconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); }
341	\| FLOATINGconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); }
342	\| CHARACTERconstant { $$ = new ExpressionNode( build_constantChar( *$1 ) ); }
343	;
344
345	identifier:
346	IDENTIFIER
347	\| ATTR_IDENTIFIER // CFA
348	\| zero_one // CFA
349	;
350
351	no_01_identifier:
352	IDENTIFIER
353	\| ATTR_IDENTIFIER // CFA
354	;
355
356	no_attr_identifier:
357	IDENTIFIER
358	\| zero_one // CFA
359	;
360
361	zero_one: // CFA
362	ZERO
363	\| ONE
364	;
365
366	string_literal:
367	string_literal_list { $$ = build_constantStr( *$1 ); }
368	;
369
370	string_literal_list: // juxtaposed strings are concatenated
371	STRINGliteral { $$ = $1; } // conversion from tok to str
372	\| string_literal_list STRINGliteral
373	{
374	appendStr( $1, $2 ); // append 2nd juxtaposed string to 1st
375	delete $2; // allocated by lexer
376	$$ = $1; // conversion from tok to str
377	}
378	;
379
380	//*********************** EXPRESSIONS ******************************
381
382	primary_expression:
383	IDENTIFIER // typedef name cannot be used as a variable name
384	{ $$ = new ExpressionNode( build_varref( $1 ) ); }
385	\| zero_one
386	{ $$ = new ExpressionNode( build_constantZeroOne( *$1 ) ); }
387	\| tuple
388	\| '(' comma_expression ')'
389	{ $$ = $2; }
390	\| '(' compound_statement ')' // GCC, lambda expression
391	{ $$ = new ExpressionNode( build_valexpr( $2 ) ); }
392	;
393
394	postfix_expression:
395	primary_expression
396	\| postfix_expression '[' push assignment_expression pop ']'
397	// CFA, comma_expression disallowed in this context because it results in a common user error: subscripting a
398	// matrix with x[i,j] instead of x[i][j]. While this change is not backwards compatible, there seems to be
399	// little advantage to this feature and many disadvantages. It is possible to write x[(i,j)] in CFA, which is
400	// equivalent to the old x[i,j].
401	{ $$ = new ExpressionNode( build_binary_val( OperKinds::Index, $1, $4 ) ); }
402	\| postfix_expression '(' argument_expression_list ')'
403	{ $$ = new ExpressionNode( build_func( $1, $3 ) ); }
404	\| postfix_expression '.' no_attr_identifier
405	{ $$ = new ExpressionNode( build_fieldSel( $1, build_varref( $3 ) ) ); }
406	\| postfix_expression '.' '[' push field_list pop ']' // CFA, tuple field selector
407	{ $$ = new ExpressionNode( build_fieldSel( $1, build_tuple( $5 ) ) ); }
408	\| postfix_expression REALFRACTIONconstant // CFA, tuple index
409	{ $$ = new ExpressionNode( build_fieldSel( $1, build_field_name_REALFRACTIONconstant( *$2 ) ) ); }
410	\| postfix_expression ARROW no_attr_identifier
411	{ $$ = new ExpressionNode( build_pfieldSel( $1, build_varref( $3 ) ) ); }
412	\| postfix_expression ARROW '[' push field_list pop ']' // CFA, tuple field selector
413	{ $$ = new ExpressionNode( build_pfieldSel( $1, build_tuple( $5 ) ) ); }
414	\| postfix_expression ICR
415	{ $$ = new ExpressionNode( build_unary_ptr( OperKinds::IncrPost, $1 ) ); }
416	\| postfix_expression DECR
417	{ $$ = new ExpressionNode( build_unary_ptr( OperKinds::DecrPost, $1 ) ); }
418	\| '(' type_name_no_function ')' '{' initializer_list comma_opt '}' // C99
419	{ $$ = new ExpressionNode( build_compoundLiteral( $2, new InitializerNode( $5, true ) ) ); }
420	\| postfix_expression '{' argument_expression_list '}' // CFA
421	{
422	Token fn;
423	fn.str = new std::string( "?{}" ); // location undefined - use location of '{'?
424	$$ = new ExpressionNode( new ConstructorExpr( build_func( new ExpressionNode( build_varref( fn ) ), (ExpressionNode *)( $1 )->set_last( $3 ) ) ) );
425	}
426	;
427
428	argument_expression_list:
429	argument_expression
430	\| argument_expression_list ',' argument_expression
431	{ $$ = (ExpressionNode *)( $1->set_last( $3 )); }
432	;
433
434	argument_expression:
435	// empty
436	{ $$ = nullptr; } // use default argument
437	\| assignment_expression
438	;
439
440	field_list: // CFA, tuple field selector
441	field
442	\| field_list ',' field { $$ = (ExpressionNode *)$1->set_last( $3 ); }
443	;
444
445	field: // CFA, tuple field selector
446	field_name
447	\| REALDECIMALconstant field
448	{ $$ = new ExpressionNode( build_fieldSel( new ExpressionNode( build_field_name_REALDECIMALconstant( *$1 ) ), maybeMoveBuild<Expression>( $2 ) ) ); }
449	\| REALDECIMALconstant '[' push field_list pop ']'
450	{ $$ = new ExpressionNode( build_fieldSel( new ExpressionNode( build_field_name_REALDECIMALconstant( *$1 ) ), build_tuple( $4 ) ) ); }
451	\| field_name '.' field
452	{ $$ = new ExpressionNode( build_fieldSel( $1, maybeMoveBuild<Expression>( $3 ) ) ); }
453	\| field_name '.' '[' push field_list pop ']'
454	{ $$ = new ExpressionNode( build_fieldSel( $1, build_tuple( $5 ) ) ); }
455	\| field_name ARROW field
456	{ $$ = new ExpressionNode( build_pfieldSel( $1, maybeMoveBuild<Expression>( $3 ) ) ); }
457	\| field_name ARROW '[' push field_list pop ']'
458	{ $$ = new ExpressionNode( build_pfieldSel( $1, build_tuple( $5 ) ) ); }
459	;
460
461	field_name:
462	INTEGERconstant fraction_constants
463	{ $$ = new ExpressionNode( build_field_name_fraction_constants( build_constantInteger( *$1 ), $2 ) ); }
464	\| FLOATINGconstant fraction_constants
465	{ $$ = new ExpressionNode( build_field_name_fraction_constants( build_field_name_FLOATINGconstant( *$1 ), $2 ) ); }
466	\| no_attr_identifier fraction_constants
467	{
468	if( ($1) == "0" \|\| ($1) == "1" ) {
469	$$ = new ExpressionNode( build_field_name_fraction_constants( build_constantZeroOne( *$1 ), $2 ) );
470	} else {
471	$$ = new ExpressionNode( build_field_name_fraction_constants( build_varref( $1 ), $2 ) );
472	}
473	}
474	;
475
476	fraction_constants:
477	// empty
478	{ $$ = nullptr; }
479	\| fraction_constants REALFRACTIONconstant
480	{
481	Expression * constant = build_field_name_REALFRACTIONconstant( *$2 );
482	$$ = $1 != nullptr ? new ExpressionNode( build_fieldSel( $1, constant ) ) : new ExpressionNode( constant );
483	}
484	;
485
486	unary_expression:
487	postfix_expression
488	// first location where constant/string can have operator applied: sizeof 3/sizeof "abc" still requires
489	// semantics checks, e.g., ++3, 3--, *3, &&3
490	\| constant
491	{ $$ = $1; }
492	\| string_literal
493	{ $$ = new ExpressionNode( $1 ); }
494	\| EXTENSION cast_expression // GCC
495	{ $$ = $2->set_extension( true ); }
496	// '*' ('&') is separated from unary_operator because of shift/reduce conflict in:
497	// { * X; } // dereference X
498	// { * int X; } // CFA declaration of pointer to int
499	\| ptrref_operator cast_expression // CFA
500	{
501	switch ( $1 ) {
502	case OperKinds::AddressOf:
503	$$ = new ExpressionNode( build_addressOf( $2 ) );
504	break;
505	case OperKinds::PointTo:
506	$$ = new ExpressionNode( build_unary_val( $1, $2 ) );
507	break;
508	default:
509	assert( false );
510	}
511	}
512	\| unary_operator cast_expression
513	{ $$ = new ExpressionNode( build_unary_val( $1, $2 ) ); }
514	\| ICR unary_expression
515	{ $$ = new ExpressionNode( build_unary_ptr( OperKinds::Incr, $2 ) ); }
516	\| DECR unary_expression
517	{ $$ = new ExpressionNode( build_unary_ptr( OperKinds::Decr, $2 ) ); }
518	\| SIZEOF unary_expression
519	{ $$ = new ExpressionNode( build_sizeOfexpr( $2 ) ); }
520	\| SIZEOF '(' type_name_no_function ')'
521	{ $$ = new ExpressionNode( build_sizeOftype( $3 ) ); }
522	\| ALIGNOF unary_expression // GCC, variable alignment
523	{ $$ = new ExpressionNode( build_alignOfexpr( $2 ) ); }
524	\| ALIGNOF '(' type_name_no_function ')' // GCC, type alignment
525	{ $$ = new ExpressionNode( build_alignOftype( $3 ) ); }
526	\| OFFSETOF '(' type_name_no_function ',' no_attr_identifier ')'
527	{ $$ = new ExpressionNode( build_offsetOf( $3, build_varref( $5 ) ) ); }
528	\| ATTR_IDENTIFIER
529	{ $$ = new ExpressionNode( build_attrexpr( build_varref( $1 ), nullptr ) ); }
530	\| ATTR_IDENTIFIER '(' argument_expression ')'
531	{ $$ = new ExpressionNode( build_attrexpr( build_varref( $1 ), $3 ) ); }
532	\| ATTR_IDENTIFIER '(' type_name ')'
533	{ $$ = new ExpressionNode( build_attrtype( build_varref( $1 ), $3 ) ); }
534	// \| ANDAND IDENTIFIER // GCC, address of label
535	// { $$ = new ExpressionNode( new OperatorNode( OperKinds::LabelAddress ), new ExpressionNode( build_varref( $2, true ) ); }
536	;
537
538	ptrref_operator:
539	'*' { $$ = OperKinds::PointTo; }
540	\| '&' { $$ = OperKinds::AddressOf; }
541	// GCC, address of label must be handled by semantic check for ref,ref,label
542	// \| ANDAND { $$ = OperKinds::And; }
543	;
544
545	unary_operator:
546	'+' { $$ = OperKinds::UnPlus; }
547	\| '-' { $$ = OperKinds::UnMinus; }
548	\| '!' { $$ = OperKinds::Neg; }
549	\| '~' { $$ = OperKinds::BitNeg; }
550	;
551
552	cast_expression:
553	unary_expression
554	\| '(' type_name_no_function ')' cast_expression
555	{ $$ = new ExpressionNode( build_cast( $2, $4 ) ); }
556	// \| '(' type_name_no_function ')' tuple
557	// { $$ = new ExpressionNode( build_cast( $2, $4 ) ); }
558	;
559
560	multiplicative_expression:
561	cast_expression
562	\| multiplicative_expression '*' cast_expression
563	{ $$ = new ExpressionNode( build_binary_val( OperKinds::Mul, $1, $3 ) ); }
564	\| multiplicative_expression '/' cast_expression
565	{ $$ = new ExpressionNode( build_binary_val( OperKinds::Div, $1, $3 ) ); }
566	\| multiplicative_expression '%' cast_expression
567	{ $$ = new ExpressionNode( build_binary_val( OperKinds::Mod, $1, $3 ) ); }
568	;
569
570	additive_expression:
571	multiplicative_expression
572	\| additive_expression '+' multiplicative_expression
573	{ $$ = new ExpressionNode( build_binary_val( OperKinds::Plus, $1, $3 ) ); }
574	\| additive_expression '-' multiplicative_expression
575	{ $$ = new ExpressionNode( build_binary_val( OperKinds::Minus, $1, $3 ) ); }
576	;
577
578	shift_expression:
579	additive_expression
580	\| shift_expression LS additive_expression
581	{ $$ = new ExpressionNode( build_binary_val( OperKinds::LShift, $1, $3 ) ); }
582	\| shift_expression RS additive_expression
583	{ $$ = new ExpressionNode( build_binary_val( OperKinds::RShift, $1, $3 ) ); }
584	;
585
586	relational_expression:
587	shift_expression
588	\| relational_expression '<' shift_expression
589	{ $$ = new ExpressionNode( build_binary_val( OperKinds::LThan, $1, $3 ) ); }
590	\| relational_expression '>' shift_expression
591	{ $$ = new ExpressionNode( build_binary_val( OperKinds::GThan, $1, $3 ) ); }
592	\| relational_expression LE shift_expression
593	{ $$ = new ExpressionNode( build_binary_val( OperKinds::LEThan, $1, $3 ) ); }
594	\| relational_expression GE shift_expression
595	{ $$ = new ExpressionNode( build_binary_val( OperKinds::GEThan, $1, $3 ) ); }
596	;
597
598	equality_expression:
599	relational_expression
600	\| equality_expression EQ relational_expression
601	{ $$ = new ExpressionNode( build_binary_val( OperKinds::Eq, $1, $3 ) ); }
602	\| equality_expression NE relational_expression
603	{ $$ = new ExpressionNode( build_binary_val( OperKinds::Neq, $1, $3 ) ); }
604	;
605
606	AND_expression:
607	equality_expression
608	\| AND_expression '&' equality_expression
609	{ $$ = new ExpressionNode( build_binary_val( OperKinds::BitAnd, $1, $3 ) ); }
610	;
611
612	exclusive_OR_expression:
613	AND_expression
614	\| exclusive_OR_expression '^' AND_expression
615	{ $$ = new ExpressionNode( build_binary_val( OperKinds::Xor, $1, $3 ) ); }
616	;
617
618	inclusive_OR_expression:
619	exclusive_OR_expression
620	\| inclusive_OR_expression '\|' exclusive_OR_expression
621	{ $$ = new ExpressionNode( build_binary_val( OperKinds::BitOr, $1, $3 ) ); }
622	;
623
624	logical_AND_expression:
625	inclusive_OR_expression
626	\| logical_AND_expression ANDAND inclusive_OR_expression
627	{ $$ = new ExpressionNode( build_and_or( $1, $3, true ) ); }
628	;
629
630	logical_OR_expression:
631	logical_AND_expression
632	\| logical_OR_expression OROR logical_AND_expression
633	{ $$ = new ExpressionNode( build_and_or( $1, $3, false ) ); }
634	;
635
636	conditional_expression:
637	logical_OR_expression
638	\| logical_OR_expression '?' comma_expression ':' conditional_expression
639	{ $$ = new ExpressionNode( build_cond( $1, $3, $5 ) ); }
640	// FIX ME: this hack computes $1 twice
641	\| logical_OR_expression '?' /* empty */ ':' conditional_expression // GCC, omitted first operand
642	{ $$ = new ExpressionNode( build_cond( $1, $1, $4 ) ); }
643	// \| logical_OR_expression '?' comma_expression ':' tuple // CFA, tuple expression
644	// { $$ = new ExpressionNode( build_cond( $1, $3, $5 ) ); }
645	;
646
647	constant_expression:
648	conditional_expression
649	;
650
651	assignment_expression:
652	// CFA, assignment is separated from assignment_operator to ensure no assignment operations for tuples
653	conditional_expression
654	\| unary_expression assignment_operator assignment_expression
655	{ $$ = new ExpressionNode( build_binary_ptr( $2, $1, $3 ) ); }
656	// \| tuple assignment_opt // CFA, tuple expression
657	// { $$ = ( $2 == 0 ) ? $1 : new ExpressionNode( build_binary_ptr( OperKinds::Assign, $1, $2 ) ); }
658	;
659
660	assignment_expression_opt:
661	// empty
662	{ $$ = nullptr; }
663	\| assignment_expression
664	;
665
666	assignment_operator:
667	'=' { $$ = OperKinds::Assign; }
668	\| ATassign { $$ = OperKinds::AtAssn; }
669	\| MULTassign { $$ = OperKinds::MulAssn; }
670	\| DIVassign { $$ = OperKinds::DivAssn; }
671	\| MODassign { $$ = OperKinds::ModAssn; }
672	\| PLUSassign { $$ = OperKinds::PlusAssn; }
673	\| MINUSassign { $$ = OperKinds::MinusAssn; }
674	\| LSassign { $$ = OperKinds::LSAssn; }
675	\| RSassign { $$ = OperKinds::RSAssn; }
676	\| ANDassign { $$ = OperKinds::AndAssn; }
677	\| ERassign { $$ = OperKinds::ERAssn; }
678	\| ORassign { $$ = OperKinds::OrAssn; }
679	;
680
681	tuple: // CFA, tuple
682	// CFA, one assignment_expression is factored out of comma_expression to eliminate a shift/reduce conflict with
683	// comma_expression in cfa_identifier_parameter_array and cfa_abstract_array
684	// '[' ']'
685	// { $$ = new ExpressionNode( build_tuple() ); }
686	// '[' push assignment_expression pop ']'
687	// { $$ = new ExpressionNode( build_tuple( $3 ) ); }
688	'[' push ',' tuple_expression_list pop ']'
689	{ $$ = new ExpressionNode( build_tuple( (ExpressionNode *)(new ExpressionNode( nullptr ) )->set_last( $4 ) ) ); }
690	\| '[' push assignment_expression ',' tuple_expression_list pop ']'
691	{ $$ = new ExpressionNode( build_tuple( (ExpressionNode *)$3->set_last( $5 ) ) ); }
692	;
693
694	tuple_expression_list:
695	assignment_expression_opt
696	\| tuple_expression_list ',' assignment_expression_opt
697	{ $$ = (ExpressionNode *)$1->set_last( $3 ); }
698	;
699
700	comma_expression:
701	assignment_expression
702	\| comma_expression ',' assignment_expression
703	{ $$ = new ExpressionNode( build_comma( $1, $3 ) ); }
704	;
705
706	comma_expression_opt:
707	// empty
708	{ $$ = nullptr; }
709	\| comma_expression
710	;
711
712	//************************* STATEMENTS *****************************
713
714	statement:
715	labeled_statement
716	\| compound_statement
717	\| expression_statement { $$ = $1; }
718	\| selection_statement
719	\| iteration_statement
720	\| jump_statement
721	\| exception_statement
722	\| asm_statement
723	\| '^' postfix_expression '{' argument_expression_list '}' ';' // CFA
724	{
725	Token fn;
726	fn.str = new string( "^?{}" ); // location undefined
727	$$ = new StatementNode( build_expr( new ExpressionNode( build_func( new ExpressionNode( build_varref( fn ) ), (ExpressionNode *)( $2 )->set_last( $4 ) ) ) ) );
728	}
729	;
730
731	labeled_statement:
732	// labels cannot be identifiers 0 or 1 or ATTR_IDENTIFIER
733	identifier_or_type_name ':' attribute_list_opt statement
734	{
735	$$ = $4->add_label( $1, $3 );
736	}
737	;
738
739	compound_statement:
740	'{' '}'
741	{ $$ = new StatementNode( build_compound( (StatementNode *)0 ) ); }
742	\| '{'
743	// Two scopes are necessary because the block itself has a scope, but every declaration within the block also
744	// requires its own scope.
745	push push
746	local_label_declaration_opt // GCC, local labels
747	block_item_list // C99, intermix declarations and statements
748	pop '}'
749	{ $$ = new StatementNode( build_compound( $5 ) ); }
750	;
751
752	block_item_list: // C99
753	block_item
754	\| block_item_list push block_item
755	{ if ( $1 != 0 ) { $1->set_last( $3 ); $$ = $1; } }
756	;
757
758	block_item:
759	declaration // CFA, new & old style declarations
760	{ $$ = new StatementNode( $1 ); }
761	\| EXTENSION declaration // GCC
762	{
763	distExt( $2 );
764	$$ = new StatementNode( $2 );
765	}
766	\| function_definition
767	{ $$ = new StatementNode( $1 ); }
768	\| EXTENSION function_definition // GCC
769	{
770	distExt( $2 );
771	$$ = new StatementNode( $2 );
772	}
773	\| statement pop
774	;
775
776	statement_list:
777	statement
778	\| statement_list statement
779	{ if ( $1 != 0 ) { $1->set_last( $2 ); $$ = $1; } }
780	;
781
782	expression_statement:
783	comma_expression_opt ';'
784	{ $$ = new StatementNode( build_expr( $1 ) ); }
785	;
786
787	selection_statement:
788	IF '(' comma_expression ')' statement %prec THEN
789	// explicitly deal with the shift/reduce conflict on if/else
790	{ $$ = new StatementNode( build_if( $3, $5, nullptr ) ); }
791	\| IF '(' comma_expression ')' statement ELSE statement
792	{ $$ = new StatementNode( build_if( $3, $5, $7 ) ); }
793	\| SWITCH '(' comma_expression ')' case_clause // CFA
794	{ $$ = new StatementNode( build_switch( $3, $5 ) ); }
795	\| SWITCH '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt '}' // CFA
796	{
797	StatementNode *sw = new StatementNode( build_switch( $3, $8 ) );
798	// The semantics of the declaration list is changed to include associated initialization, which is performed
799	// before the transfer to the appropriate case clause by hoisting the declarations into a compound
800	// statement around the switch. Statements after the initial declaration list can never be executed, and
801	// therefore, are removed from the grammar even though C allows it. The change also applies to choose
802	// statement.
803	$$ = $7 ? new StatementNode( build_compound( (StatementNode *)((new StatementNode( $7 ))->set_last( sw )) ) ) : sw;
804	}
805	\| CHOOSE '(' comma_expression ')' case_clause // CFA
806	{ $$ = new StatementNode( build_switch( $3, $5 ) ); }
807	\| CHOOSE '(' comma_expression ')' '{' push declaration_list_opt choose_clause_list_opt '}' // CFA
808	{
809	StatementNode *sw = new StatementNode( build_switch( $3, $8 ) );
810	$$ = $7 ? new StatementNode( build_compound( (StatementNode *)((new StatementNode( $7 ))->set_last( sw )) ) ) : sw;
811	}
812	;
813
814	// CASE and DEFAULT clauses are only allowed in the SWITCH statement, precluding Duff's device. In addition, a case
815	// clause allows a list of values and subranges.
816
817	case_value: // CFA
818	constant_expression { $$ = $1; }
819	\| constant_expression ELLIPSIS constant_expression // GCC, subrange
820	{ $$ = new ExpressionNode( build_range( $1, $3 ) ); }
821	\| subrange // CFA, subrange
822	;
823
824	case_value_list: // CFA
825	case_value { $$ = new StatementNode( build_case( $1 ) ); }
826	// convert case list, e.g., "case 1, 3, 5:" into "case 1: case 3: case 5"
827	\| case_value_list ',' case_value { $$ = (StatementNode *)($1->set_last( new StatementNode( build_case( $3 ) ) ) ); }
828	;
829
830	case_label: // CFA
831	CASE case_value_list ':' { $$ = $2; }
832	\| DEFAULT ':' { $$ = new StatementNode( build_default() ); }
833	// A semantic check is required to ensure only one default clause per switch/choose statement.
834	;
835
836	case_label_list: // CFA
837	case_label
838	\| case_label_list case_label { $$ = (StatementNode *)( $1->set_last( $2 )); }
839	;
840
841	case_clause: // CFA
842	case_label_list statement { $$ = $1->append_last_case( new StatementNode( build_compound( $2 ) ) ); }
843	;
844
845	switch_clause_list_opt: // CFA
846	// empty
847	{ $$ = nullptr; }
848	\| switch_clause_list
849	;
850
851	switch_clause_list: // CFA
852	case_label_list statement_list
853	{ $$ = $1->append_last_case( new StatementNode( build_compound( $2 ) ) ); }
854	\| switch_clause_list case_label_list statement_list
855	{ $$ = (StatementNode *)( $1->set_last( $2->append_last_case( new StatementNode( build_compound( $3 ) ) ) ) ); }
856	;
857
858	choose_clause_list_opt: // CFA
859	// empty
860	{ $$ = nullptr; }
861	\| choose_clause_list
862	;
863
864	choose_clause_list: // CFA
865	case_label_list fall_through
866	{ $$ = $1->append_last_case( $2 ); }
867	\| case_label_list statement_list fall_through_opt
868	{ $$ = $1->append_last_case( new StatementNode( build_compound( (StatementNode *)$2->set_last( $3 ) ) ) ); }
869	\| choose_clause_list case_label_list fall_through
870	{ $$ = (StatementNode *)( $1->set_last( $2->append_last_case( $3 ))); }
871	\| choose_clause_list case_label_list statement_list fall_through_opt
872	{ $$ = (StatementNode )( $1->set_last( $2->append_last_case( new StatementNode( build_compound( (StatementNode )$3->set_last( $4 ) ) ) ) ) ); }
873	;
874
875	fall_through_opt: // CFA
876	// empty
877	{ $$ = new StatementNode( build_branch( BranchStmt::Break ) ); } // insert implicit break
878	\| fall_through
879	;
880
881	fall_through: // CFA
882	FALLTHRU
883	{ $$ = nullptr; }
884	\| FALLTHRU ';'
885	{ $$ = nullptr; }
886	;
887
888	iteration_statement:
889	WHILE '(' comma_expression ')' statement
890	{ $$ = new StatementNode( build_while( $3, $5 ) ); }
891	\| DO statement WHILE '(' comma_expression ')' ';'
892	{ $$ = new StatementNode( build_while( $5, $2, true ) ); }
893	\| FOR '(' push for_control_expression ')' statement
894	{ $$ = new StatementNode( build_for( $4, $6 ) ); }
895	;
896
897	for_control_expression:
898	comma_expression_opt pop ';' comma_expression_opt ';' comma_expression_opt
899	{ $$ = new ForCtl( $1, $4, $6 ); }
900	\| declaration comma_expression_opt ';' comma_expression_opt // C99
901	{ $$ = new ForCtl( $1, $2, $4 ); }
902	;
903
904	jump_statement:
905	GOTO identifier_or_type_name ';'
906	{ $$ = new StatementNode( build_branch( $2, BranchStmt::Goto ) ); }
907	\| GOTO '*' comma_expression ';' // GCC, computed goto
908	// The syntax for the GCC computed goto violates normal expression precedence, e.g., goto i+3; => goto (i+3);
909	// whereas normal operator precedence yields goto (*i)+3;
910	{ $$ = new StatementNode( build_computedgoto( $3 ) ); }
911	\| CONTINUE ';'
912	// A semantic check is required to ensure this statement appears only in the body of an iteration statement.
913	{ $$ = new StatementNode( build_branch( BranchStmt::Continue ) ); }
914	\| CONTINUE identifier_or_type_name ';' // CFA, multi-level continue
915	// A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
916	// the target of the transfer appears only at the start of an iteration statement.
917	{ $$ = new StatementNode( build_branch( $2, BranchStmt::Continue ) ); }
918	\| BREAK ';'
919	// A semantic check is required to ensure this statement appears only in the body of an iteration statement.
920	{ $$ = new StatementNode( build_branch( BranchStmt::Break ) ); }
921	\| BREAK identifier_or_type_name ';' // CFA, multi-level exit
922	// A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
923	// the target of the transfer appears only at the start of an iteration statement.
924	{ $$ = new StatementNode( build_branch( $2, BranchStmt::Break ) ); }
925	\| RETURN comma_expression_opt ';'
926	{ $$ = new StatementNode( build_return( $2 ) ); }
927	\| THROW assignment_expression_opt ';' // handles rethrow
928	{ $$ = new StatementNode( build_throw( $2 ) ); }
929	\| THROWRESUME assignment_expression_opt ';' // handles reresume
930	{ $$ = new StatementNode( build_throw( $2 ) ); }
931	\| THROWRESUME assignment_expression_opt AT assignment_expression ';' // handles reresume
932	{ $$ = new StatementNode( build_throw( $2 ) ); }
933	;
934
935	exception_statement:
936	TRY compound_statement handler_list
937	{ $$ = new StatementNode( build_try( $2, $3, 0 ) ); }
938	\| TRY compound_statement finally_clause
939	{ $$ = new StatementNode( build_try( $2, 0, $3 ) ); }
940	\| TRY compound_statement handler_list finally_clause
941	{ $$ = new StatementNode( build_try( $2, $3, $4 ) ); }
942	;
943
944	handler_list:
945	handler_clause
946	// ISO/IEC 9899:1999 Section 15.3(6 ) If present, a "..." handler shall be the last handler for its try block.
947	\| CATCH '(' ELLIPSIS ')' compound_statement
948	{ $$ = new StatementNode( build_catch( 0, $5, true ) ); }
949	\| handler_clause CATCH '(' ELLIPSIS ')' compound_statement
950	{ $$ = (StatementNode *)$1->set_last( new StatementNode( build_catch( 0, $6, true ) ) ); }
951	\| CATCHRESUME '(' ELLIPSIS ')' compound_statement
952	{ $$ = new StatementNode( build_catch( 0, $5, true ) ); }
953	\| handler_clause CATCHRESUME '(' ELLIPSIS ')' compound_statement
954	{ $$ = (StatementNode *)$1->set_last( new StatementNode( build_catch( 0, $6, true ) ) ); }
955	;
956
957	handler_clause:
958	CATCH '(' push push exception_declaration pop ')' compound_statement pop
959	{ $$ = new StatementNode( build_catch( $5, $8 ) ); }
960	\| handler_clause CATCH '(' push push exception_declaration pop ')' compound_statement pop
961	{ $$ = (StatementNode *)$1->set_last( new StatementNode( build_catch( $6, $9 ) ) ); }
962	\| CATCHRESUME '(' push push exception_declaration pop ')' compound_statement pop
963	{ $$ = new StatementNode( build_catch( $5, $8 ) ); }
964	\| handler_clause CATCHRESUME '(' push push exception_declaration pop ')' compound_statement pop
965	{ $$ = (StatementNode *)$1->set_last( new StatementNode( build_catch( $6, $9 ) ) ); }
966	;
967
968	finally_clause:
969	FINALLY compound_statement
970	{
971	$$ = new StatementNode( build_finally( $2 ) );
972	}
973	;
974
975	exception_declaration:
976	// A semantic check is required to ensure type_specifier does not create a new type, e.g.:
977	//
978	// catch ( struct { int i; } x ) ...
979	//
980	// This new type cannot catch any thrown type because of name equivalence among types.
981	type_specifier
982	\| type_specifier declarator
983	{
984	typedefTable.addToEnclosingScope( TypedefTable::ID );
985	$$ = $2->addType( $1 );
986	}
987	\| type_specifier variable_abstract_declarator
988	{ $$ = $2->addType( $1 ); }
989	\| cfa_abstract_declarator_tuple no_attr_identifier // CFA
990	{
991	typedefTable.addToEnclosingScope( TypedefTable::ID );
992	$$ = $1->addName( $2 );
993	}
994	\| cfa_abstract_declarator_tuple // CFA
995	;
996
997	asm_statement:
998	ASM asm_volatile_opt '(' string_literal ')' ';'
999	{ $$ = new StatementNode( build_asmstmt( $2, $4, 0 ) ); }
1000	\| ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ')' ';' // remaining GCC
1001	{ $$ = new StatementNode( build_asmstmt( $2, $4, $6 ) ); }
1002	\| ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ')' ';'
1003	{ $$ = new StatementNode( build_asmstmt( $2, $4, $6, $8 ) ); }
1004	\| ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ':' asm_clobbers_list_opt ')' ';'
1005	{ $$ = new StatementNode( build_asmstmt( $2, $4, $6, $8, $10 ) ); }
1006	\| ASM asm_volatile_opt GOTO '(' string_literal ':' ':' asm_operands_opt ':' asm_clobbers_list_opt ':' label_list ')' ';'
1007	{ $$ = new StatementNode( build_asmstmt( $2, $5, 0, $8, $10, $12 ) ); }
1008	;
1009
1010	asm_volatile_opt: // GCC
1011	// empty
1012	{ $$ = false; }
1013	\| VOLATILE
1014	{ $$ = true; }
1015	;
1016
1017	asm_operands_opt: // GCC
1018	// empty
1019	{ $$ = nullptr; } // use default argument
1020	\| asm_operands_list
1021	;
1022
1023	asm_operands_list: // GCC
1024	asm_operand
1025	\| asm_operands_list ',' asm_operand
1026	{ $$ = (ExpressionNode *)$1->set_last( $3 ); }
1027	;
1028
1029	asm_operand: // GCC
1030	string_literal '(' constant_expression ')'
1031	{ $$ = new ExpressionNode( build_asmexpr( 0, $1, $3 ) ); }
1032	\| '[' constant_expression ']' string_literal '(' constant_expression ')'
1033	{ $$ = new ExpressionNode( build_asmexpr( $2, $4, $6 ) ); }
1034	;
1035
1036	asm_clobbers_list_opt: // GCC
1037	// empty
1038	{ $$ = nullptr; } // use default argument
1039	\| string_literal
1040	{ $$ = new ExpressionNode( $1 ); }
1041	\| asm_clobbers_list_opt ',' string_literal
1042	// set_last return ParseNode *
1043	{ $$ = (ExpressionNode *)$1->set_last( new ExpressionNode( $3 ) ); }
1044	;
1045
1046	label_list:
1047	no_attr_identifier
1048	{
1049	$$ = new LabelNode(); $$->labels.push_back( *$1 );
1050	delete $1; // allocated by lexer
1051	}
1052	\| label_list ',' no_attr_identifier
1053	{
1054	$$ = $1; $1->labels.push_back( *$3 );
1055	delete $3; // allocated by lexer
1056	}
1057	;
1058
1059	//***************************** DECLARATIONS *******************************
1060
1061	declaration_list_opt: // used at beginning of switch statement
1062	pop
1063	{ $$ = nullptr; }
1064	\| declaration_list
1065	;
1066
1067	declaration_list:
1068	declaration
1069	\| declaration_list push declaration
1070	{ $$ = $1->appendList( $3 ); }
1071	;
1072
1073	KR_declaration_list_opt: // used to declare parameter types in K&R style functions
1074	pop
1075	{ $$ = nullptr; }
1076	\| KR_declaration_list
1077	;
1078
1079	KR_declaration_list:
1080	c_declaration
1081	\| KR_declaration_list push c_declaration
1082	{ $$ = $1->appendList( $3 ); }
1083	;
1084
1085	local_label_declaration_opt: // GCC, local label
1086	// empty
1087	\| local_label_declaration_list
1088	;
1089
1090	local_label_declaration_list: // GCC, local label
1091	LABEL local_label_list ';'
1092	\| local_label_declaration_list LABEL local_label_list ';'
1093	;
1094
1095	local_label_list: // GCC, local label
1096	no_attr_identifier_or_type_name {}
1097	\| local_label_list ',' no_attr_identifier_or_type_name {}
1098	;
1099
1100	declaration: // CFA, new & old style declarations
1101	cfa_declaration
1102	\| c_declaration
1103	;
1104
1105	// C declaration syntax is notoriously confusing and error prone. Cforall provides its own type, variable and function
1106	// declarations. CFA declarations use the same declaration tokens as in C; however, CFA places declaration modifiers to
1107	// the left of the base type, while C declarations place modifiers to the right of the base type. CFA declaration
1108	// modifiers are interpreted from left to right and the entire type specification is distributed across all variables in
1109	// the declaration list (as in Pascal). ANSI C and the new CFA declarations may appear together in the same program
1110	// block, but cannot be mixed within a specific declaration.
1111	//
1112	// CFA C
1113	// [10] int x; int x[10]; // array of 10 integers
1114	// [10] * char y; char *y[10]; // array of 10 pointers to char
1115
1116	cfa_declaration: // CFA
1117	cfa_variable_declaration pop ';'
1118	\| cfa_typedef_declaration pop ';'
1119	\| cfa_function_declaration pop ';'
1120	\| type_declaring_list pop ';'
1121	\| trait_specifier pop ';'
1122	;
1123
1124	cfa_variable_declaration: // CFA
1125	cfa_variable_specifier initializer_opt
1126	{
1127	typedefTable.addToEnclosingScope( TypedefTable::ID );
1128	$$ = $1->addInitializer( $2 );
1129	}
1130	\| declaration_qualifier_list cfa_variable_specifier initializer_opt
1131	// declaration_qualifier_list also includes type_qualifier_list, so a semantic check is necessary to preclude
1132	// them as a type_qualifier cannot appear in that context.
1133	{
1134	typedefTable.addToEnclosingScope( TypedefTable::ID );
1135	$$ = $2->addQualifiers( $1 )->addInitializer( $3 );;
1136	}
1137	\| cfa_variable_declaration pop ',' push identifier_or_type_name initializer_opt
1138	{
1139	typedefTable.addToEnclosingScope( *$5, TypedefTable::ID );
1140	$$ = $1->appendList( $1->cloneType( $5 )->addInitializer( $6 ) );
1141	}
1142	;
1143
1144	cfa_variable_specifier: // CFA
1145	// A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
1146	// storage-class
1147	cfa_abstract_declarator_no_tuple identifier_or_type_name asm_name_opt
1148	{
1149	typedefTable.setNextIdentifier( *$2 );
1150	$$ = $1->addName( $2 )->addAsmName( $3 );
1151	}
1152	\| cfa_abstract_tuple identifier_or_type_name asm_name_opt
1153	{
1154	typedefTable.setNextIdentifier( *$2 );
1155	$$ = $1->addName( $2 )->addAsmName( $3 );
1156	}
1157	\| type_qualifier_list cfa_abstract_tuple identifier_or_type_name asm_name_opt
1158	{
1159	typedefTable.setNextIdentifier( *$3 );
1160	$$ = $2->addQualifiers( $1 )->addName( $3 )->addAsmName( $4 );
1161	}
1162	;
1163
1164	cfa_function_declaration: // CFA
1165	cfa_function_specifier
1166	{
1167	typedefTable.addToEnclosingScope( TypedefTable::ID );
1168	$$ = $1;
1169	}
1170	\| type_qualifier_list cfa_function_specifier
1171	{
1172	typedefTable.addToEnclosingScope( TypedefTable::ID );
1173	$$ = $2->addQualifiers( $1 );
1174	}
1175	\| declaration_qualifier_list cfa_function_specifier
1176	{
1177	typedefTable.addToEnclosingScope( TypedefTable::ID );
1178	$$ = $2->addQualifiers( $1 );
1179	}
1180	\| declaration_qualifier_list type_qualifier_list cfa_function_specifier
1181	{
1182	typedefTable.addToEnclosingScope( TypedefTable::ID );
1183	$$ = $3->addQualifiers( $1 )->addQualifiers( $2 );
1184	}
1185	\| cfa_function_declaration pop ',' push identifier_or_type_name
1186	{
1187	typedefTable.addToEnclosingScope( *$5, TypedefTable::ID );
1188	$$ = $1->appendList( $1->cloneType( $5 ) );
1189	}
1190	;
1191
1192	cfa_function_specifier: // CFA
1193	// '[' ']' identifier_or_type_name '(' push cfa_parameter_type_list_opt pop ')' // S/R conflict
1194	// {
1195	// $$ = DeclarationNode::newFunction( $3, DeclarationNode::newTuple( 0 ), $6, 0, true );
1196	// }
1197	// '[' ']' identifier '(' push cfa_parameter_type_list_opt pop ')'
1198	// {
1199	// typedefTable.setNextIdentifier( *$5 );
1200	// $$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, 0, true );
1201	// }
1202	// \| '[' ']' TYPEDEFname '(' push cfa_parameter_type_list_opt pop ')'
1203	// {
1204	// typedefTable.setNextIdentifier( *$5 );
1205	// $$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, 0, true );
1206	// }
1207	// \| '[' ']' typegen_name
1208	// identifier_or_type_name must be broken apart because of the sequence:
1209	//
1210	// '[' ']' identifier_or_type_name '(' cfa_parameter_type_list_opt ')'
1211	// '[' ']' type_specifier
1212	//
1213	// type_specifier can resolve to just TYPEDEFname (e.g., typedef int T; int f( T );). Therefore this must be
1214	// flattened to allow lookahead to the '(' without having to reduce identifier_or_type_name.
1215	cfa_abstract_tuple identifier_or_type_name '(' push cfa_parameter_type_list_opt pop ')'
1216	// To obtain LR(1 ), this rule must be factored out from function return type (see cfa_abstract_declarator).
1217	{
1218	$$ = DeclarationNode::newFunction( $2, $1, $5, 0, true );
1219	}
1220	\| cfa_function_return identifier_or_type_name '(' push cfa_parameter_type_list_opt pop ')'
1221	{
1222	$$ = DeclarationNode::newFunction( $2, $1, $5, 0, true );
1223	}
1224	;
1225
1226	cfa_function_return: // CFA
1227	'[' push cfa_parameter_list pop ']'
1228	{ $$ = DeclarationNode::newTuple( $3 ); }
1229	\| '[' push cfa_parameter_list pop ',' push cfa_abstract_parameter_list pop ']'
1230	// To obtain LR(1 ), the last cfa_abstract_parameter_list is added into this flattened rule to lookahead to the
1231	// ']'.
1232	{ $$ = DeclarationNode::newTuple( $3->appendList( $7 ) ); }
1233	;
1234
1235	cfa_typedef_declaration: // CFA
1236	TYPEDEF cfa_variable_specifier
1237	{
1238	typedefTable.addToEnclosingScope( TypedefTable::TD );
1239	$$ = $2->addTypedef();
1240	}
1241	\| TYPEDEF cfa_function_specifier
1242	{
1243	typedefTable.addToEnclosingScope( TypedefTable::TD );
1244	$$ = $2->addTypedef();
1245	}
1246	\| cfa_typedef_declaration pop ',' push no_attr_identifier
1247	{
1248	typedefTable.addToEnclosingScope( *$5, TypedefTable::TD );
1249	$$ = $1->appendList( $1->cloneType( $5 ) );
1250	}
1251	;
1252
1253	// Traditionally typedef is part of storage-class specifier for syntactic convenience only. Here, it is factored out as
1254	// a separate form of declaration, which syntactically precludes storage-class specifiers and initialization.
1255
1256	typedef_declaration:
1257	TYPEDEF type_specifier declarator
1258	{
1259	typedefTable.addToEnclosingScope( TypedefTable::TD );
1260	$$ = $3->addType( $2 )->addTypedef();
1261	}
1262	\| typedef_declaration pop ',' push declarator
1263	{
1264	typedefTable.addToEnclosingScope( TypedefTable::TD );
1265	$$ = $1->appendList( $1->cloneBaseType( $5 )->addTypedef() );
1266	}
1267	\| type_qualifier_list TYPEDEF type_specifier declarator // remaining OBSOLESCENT (see 2 )
1268	{
1269	typedefTable.addToEnclosingScope( TypedefTable::TD );
1270	$$ = $4->addType( $3 )->addQualifiers( $1 )->addTypedef();
1271	}
1272	\| type_specifier TYPEDEF declarator
1273	{
1274	typedefTable.addToEnclosingScope( TypedefTable::TD );
1275	$$ = $3->addType( $1 )->addTypedef();
1276	}
1277	\| type_specifier TYPEDEF type_qualifier_list declarator
1278	{
1279	typedefTable.addToEnclosingScope( TypedefTable::TD );
1280	$$ = $4->addQualifiers( $1 )->addTypedef()->addType( $1 );
1281	}
1282	;
1283
1284	typedef_expression:
1285	// GCC, naming expression type: typedef name = exp; gives a name to the type of an expression
1286	TYPEDEF no_attr_identifier '=' assignment_expression
1287	{
1288	typedefTable.addToEnclosingScope( *$2, TypedefTable::TD );
1289	$$ = DeclarationNode::newName( 0 ); // unimplemented
1290	}
1291	\| typedef_expression pop ',' push no_attr_identifier '=' assignment_expression
1292	{
1293	typedefTable.addToEnclosingScope( *$5, TypedefTable::TD );
1294	$$ = DeclarationNode::newName( 0 ); // unimplemented
1295	}
1296	;
1297
1298	c_declaration:
1299	declaration_specifier declaring_list pop ';'
1300	{
1301	$$ = distAttr( $1, $2 );
1302	}
1303	\| typedef_declaration pop ';'
1304	\| typedef_expression pop ';' // GCC, naming expression type
1305	\| sue_declaration_specifier pop ';'
1306	;
1307
1308	declaring_list:
1309	// A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
1310	// storage-class
1311	declarator asm_name_opt initializer_opt
1312	{
1313	typedefTable.addToEnclosingScope( TypedefTable::ID );
1314	$$ = $1->addAsmName( $2 )->addInitializer( $3 );
1315	}
1316	\| declaring_list ',' attribute_list_opt declarator asm_name_opt initializer_opt
1317	{
1318	typedefTable.addToEnclosingScope( TypedefTable::ID );
1319	$$ = $1->appendList( $4->addQualifiers( $3 )->addAsmName( $5 )->addInitializer( $6 ) );
1320	}
1321	;
1322
1323	declaration_specifier: // type specifier + storage class
1324	basic_declaration_specifier
1325	\| sue_declaration_specifier
1326	\| typedef_declaration_specifier
1327	\| typegen_declaration_specifier
1328	;
1329
1330	type_specifier: // declaration specifier - storage class
1331	basic_type_specifier
1332	\| sue_type_specifier
1333	\| typedef_type_specifier
1334	\| typegen_type_specifier
1335	;
1336
1337	type_qualifier_list_opt: // GCC, used in asm_statement
1338	// empty
1339	{ $$ = nullptr; }
1340	\| type_qualifier_list
1341	;
1342
1343	type_qualifier_list:
1344	// A semantic check is necessary to ensure a type qualifier is appropriate for the kind of declaration.
1345	//
1346	// ISO/IEC 9899:1999 Section 6.7.3(4 ) : If the same qualifier appears more than once in the same
1347	// specifier-qualifier-list, either directly or via one or more typedefs, the behavior is the same as if it
1348	// appeared only once.
1349	type_qualifier
1350	\| type_qualifier_list type_qualifier
1351	{ $$ = $1->addQualifiers( $2 ); }
1352	;
1353
1354	type_qualifier:
1355	type_qualifier_name
1356	\| attribute
1357	;
1358
1359	type_qualifier_name:
1360	CONST
1361	{ $$ = DeclarationNode::newQualifier( DeclarationNode::Const ); }
1362	\| RESTRICT
1363	{ $$ = DeclarationNode::newQualifier( DeclarationNode::Restrict ); }
1364	\| VOLATILE
1365	{ $$ = DeclarationNode::newQualifier( DeclarationNode::Volatile ); }
1366	\| LVALUE // CFA
1367	{ $$ = DeclarationNode::newQualifier( DeclarationNode::Lvalue ); }
1368	\| ATOMIC
1369	{ $$ = DeclarationNode::newQualifier( DeclarationNode::Atomic ); }
1370	\| FORALL '('
1371	{
1372	typedefTable.enterScope();
1373	}
1374	type_parameter_list ')' // CFA
1375	{
1376	typedefTable.leaveScope();
1377	$$ = DeclarationNode::newForall( $4 );
1378	}
1379	;
1380
1381	declaration_qualifier_list:
1382	storage_class_list
1383	\| type_qualifier_list storage_class_list // remaining OBSOLESCENT (see 2 )
1384	{ $$ = $1->addQualifiers( $2 ); }
1385	\| declaration_qualifier_list type_qualifier_list storage_class_list
1386	{ $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1387	;
1388
1389	storage_class_list:
1390	// A semantic check is necessary to ensure a storage class is appropriate for the kind of declaration and that
1391	// only one of each is specified, except for inline, which can appear with the others.
1392	//
1393	// ISO/IEC 9899:1999 Section 6.7.1(2) : At most, one storage-class specifier may be given in the declaration
1394	// specifiers in a declaration.
1395	storage_class
1396	\| storage_class_list storage_class
1397	{ $$ = $1->addQualifiers( $2 ); }
1398	;
1399
1400	storage_class:
1401	EXTERN
1402	{ $$ = DeclarationNode::newStorageClass( DeclarationNode::Extern ); }
1403	\| STATIC
1404	{ $$ = DeclarationNode::newStorageClass( DeclarationNode::Static ); }
1405	\| AUTO
1406	{ $$ = DeclarationNode::newStorageClass( DeclarationNode::Auto ); }
1407	\| REGISTER
1408	{ $$ = DeclarationNode::newStorageClass( DeclarationNode::Register ); }
1409	\| INLINE // C99
1410	//{ $$ = DeclarationNode::newStorageClass( DeclarationNode::Inline ); }
1411	{ $$ = new DeclarationNode; $$->isInline = true; }
1412	\| FORTRAN // C99
1413	{ $$ = DeclarationNode::newStorageClass( DeclarationNode::Fortran ); }
1414	\| NORETURN // C11
1415	//{ $$ = DeclarationNode::newStorageClass( DeclarationNode::Noreturn ); }
1416	{ $$ = new DeclarationNode; $$->isNoreturn = true; }
1417	\| THREADLOCAL // C11
1418	{ $$ = DeclarationNode::newStorageClass( DeclarationNode::Threadlocal ); }
1419	;
1420
1421	basic_type_name:
1422	CHAR
1423	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Char ); }
1424	\| DOUBLE
1425	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Double ); }
1426	\| FLOAT
1427	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Float ); }
1428	\| INT
1429	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Int ); }
1430	\| LONG
1431	{ $$ = DeclarationNode::newLength( DeclarationNode::Long ); }
1432	\| SHORT
1433	{ $$ = DeclarationNode::newLength( DeclarationNode::Short ); }
1434	\| SIGNED
1435	{ $$ = DeclarationNode::newSignedNess( DeclarationNode::Signed ); }
1436	\| UNSIGNED
1437	{ $$ = DeclarationNode::newSignedNess( DeclarationNode::Unsigned ); }
1438	\| VOID
1439	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Void ); }
1440	\| BOOL // C99
1441	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Bool ); }
1442	\| COMPLEX // C99
1443	{ $$ = DeclarationNode::newComplexType( DeclarationNode::Complex ); }
1444	\| IMAGINARY // C99
1445	{ $$ = DeclarationNode::newComplexType( DeclarationNode::Imaginary ); }
1446	\| VALIST // GCC, __builtin_va_list
1447	{ $$ = DeclarationNode::newBuiltinType( DeclarationNode::Valist ); }
1448	\| ZERO_T
1449	{ $$ = DeclarationNode::newBuiltinType( DeclarationNode::Zero ); }
1450	\| ONE_T
1451	{ $$ = DeclarationNode::newBuiltinType( DeclarationNode::One ); }
1452	;
1453
1454	basic_declaration_specifier:
1455	// A semantic check is necessary for conflicting storage classes.
1456	basic_type_specifier
1457	\| declaration_qualifier_list basic_type_specifier
1458	{ $$ = $2->addQualifiers( $1 ); }
1459	\| basic_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1460	{ $$ = $1->addQualifiers( $2 ); }
1461	\| basic_declaration_specifier storage_class type_qualifier_list
1462	{ $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1463	\| basic_declaration_specifier storage_class basic_type_specifier
1464	{ $$ = $3->addQualifiers( $2 )->addType( $1 ); }
1465	;
1466
1467	basic_type_specifier:
1468	direct_type_name
1469	\| type_qualifier_list_opt indirect_type_name type_qualifier_list_opt
1470	{ $$ = $2->addQualifiers( $1 )->addQualifiers( $3 ); }
1471	;
1472
1473	direct_type_name:
1474	// A semantic check is necessary for conflicting type qualifiers.
1475	basic_type_name
1476	\| type_qualifier_list basic_type_name
1477	{ $$ = $2->addQualifiers( $1 ); }
1478	\| direct_type_name type_qualifier
1479	{ $$ = $1->addQualifiers( $2 ); }
1480	\| direct_type_name basic_type_name
1481	{ $$ = $1->addType( $2 ); }
1482	;
1483
1484	indirect_type_name:
1485	TYPEOF '(' type_name ')' // GCC: typeof(x) y;
1486	{ $$ = $3; }
1487	\| TYPEOF '(' comma_expression ')' // GCC: typeof(a+b) y;
1488	{ $$ = DeclarationNode::newTypeof( $3 ); }
1489	\| ATTR_TYPEGENname '(' type_name ')' // CFA: e.g., @type(x) y;
1490	{ $$ = DeclarationNode::newAttr( $1, $3 ); }
1491	\| ATTR_TYPEGENname '(' comma_expression ')' // CFA: e.g., @type(a+b) y;
1492	{ $$ = DeclarationNode::newAttr( $1, $3 ); }
1493	;
1494
1495	sue_declaration_specifier:
1496	sue_type_specifier
1497	\| declaration_qualifier_list sue_type_specifier
1498	{ $$ = $2->addQualifiers( $1 ); }
1499	\| sue_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1500	{ $$ = $1->addQualifiers( $2 ); }
1501	\| sue_declaration_specifier storage_class type_qualifier_list
1502	{ $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1503	;
1504
1505	sue_type_specifier:
1506	elaborated_type // struct, union, enum
1507	\| type_qualifier_list elaborated_type
1508	{ $$ = $2->addQualifiers( $1 ); }
1509	\| sue_type_specifier type_qualifier
1510	{ $$ = $1->addQualifiers( $2 ); }
1511	;
1512
1513	typedef_declaration_specifier:
1514	typedef_type_specifier
1515	\| declaration_qualifier_list typedef_type_specifier
1516	{ $$ = $2->addQualifiers( $1 ); }
1517	\| typedef_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1518	{ $$ = $1->addQualifiers( $2 ); }
1519	\| typedef_declaration_specifier storage_class type_qualifier_list
1520	{ $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1521	;
1522
1523	typedef_type_specifier: // typedef types
1524	TYPEDEFname
1525	{ $$ = DeclarationNode::newFromTypedef( $1 ); }
1526	\| type_qualifier_list TYPEDEFname
1527	{ $$ = DeclarationNode::newFromTypedef( $2 )->addQualifiers( $1 ); }
1528	\| typedef_type_specifier type_qualifier
1529	{ $$ = $1->addQualifiers( $2 ); }
1530	;
1531
1532	elaborated_type:
1533	aggregate_type
1534	\| enum_type
1535	;
1536
1537	aggregate_type:
1538	aggregate_key attribute_list_opt '{' field_declaration_list '}'
1539	{ $$ = DeclarationNode::newAggregate( $1, nullptr, nullptr, $4, true, $2 )->addQualifiers( $2 ); }
1540	\| aggregate_key attribute_list_opt no_attr_identifier_or_type_name
1541	{
1542	typedefTable.makeTypedef( *$3 );
1543	$$ = DeclarationNode::newAggregate( $1, $3, nullptr, nullptr, false, $2 )->addQualifiers( $2 );
1544	}
1545	\| aggregate_key attribute_list_opt no_attr_identifier_or_type_name
1546	{ typedefTable.makeTypedef( *$3 ); }
1547	'{' field_declaration_list '}'
1548	{ $$ = DeclarationNode::newAggregate( $1, $3, nullptr, $6, true, $2 )->addQualifiers( $2 ); }
1549	\| aggregate_key attribute_list_opt '(' type_name_list ')' '{' field_declaration_list '}' // CFA
1550	{ $$ = DeclarationNode::newAggregate( $1, nullptr, $4, $7, false, $2 )->addQualifiers( $2 ); }
1551	\| aggregate_key attribute_list_opt typegen_name // CFA, S/R conflict
1552	{ $$ = $3->addQualifiers( $2 ); }
1553	;
1554
1555	aggregate_key:
1556	STRUCT
1557	{ $$ = DeclarationNode::Struct; }
1558	\| UNION
1559	{ $$ = DeclarationNode::Union; }
1560	;
1561
1562	field_declaration_list:
1563	// empty
1564	{ $$ = nullptr; }
1565	\| field_declaration_list field_declaration
1566	{ $$ = $1 ? $1->appendList( $2 ) : $2; }
1567	;
1568
1569	field_declaration:
1570	extension_opt cfa_field_declaring_list ';' // CFA, new style field declaration
1571	{ $$ = $2->set_extension( $1 ); }
1572	\| extension_opt type_specifier field_declaring_list ';'
1573	{
1574	if ( $1 ) distExt( $3 ); // mark all fields in list
1575	$$ = distAttr( $2, $3 );
1576	}
1577	;
1578
1579	cfa_field_declaring_list: // CFA, new style field declaration
1580	cfa_abstract_declarator_tuple // CFA, no field name
1581	\| cfa_abstract_declarator_tuple no_attr_identifier_or_type_name
1582	{ $$ = $1->addName( $2 ); }
1583	\| cfa_field_declaring_list ',' no_attr_identifier_or_type_name
1584	{ $$ = $1->appendList( $1->cloneType( $3 ) ); }
1585	\| cfa_field_declaring_list ',' // CFA, no field name
1586	{ $$ = $1->appendList( $1->cloneType( 0 ) ); }
1587	;
1588
1589	field_declaring_list:
1590	field_declarator
1591	\| field_declaring_list ',' attribute_list_opt field_declarator
1592	{ $$ = $1->appendList( $4->addQualifiers( $3 ) ); }
1593	;
1594
1595	field_declarator:
1596	// empty
1597	{ $$ = DeclarationNode::newName( 0 ); /* XXX */ } // CFA, no field name
1598	\| bit_subrange_size // no field name
1599	{ $$ = DeclarationNode::newBitfield( $1 ); }
1600	\| variable_declarator bit_subrange_size_opt
1601	// A semantic check is required to ensure bit_subrange only appears on base type int.
1602	{ $$ = $1->addBitfield( $2 ); }
1603	\| variable_type_redeclarator bit_subrange_size_opt
1604	// A semantic check is required to ensure bit_subrange only appears on base type int.
1605	{ $$ = $1->addBitfield( $2 ); }
1606	\| variable_abstract_declarator // CFA, no field name
1607	;
1608
1609	bit_subrange_size_opt:
1610	// empty
1611	{ $$ = nullptr; }
1612	\| bit_subrange_size
1613	{ $$ = $1; }
1614	;
1615
1616	bit_subrange_size:
1617	':' constant_expression
1618	{ $$ = $2; }
1619	;
1620
1621	enum_type:
1622	ENUM attribute_list_opt '{' enumerator_list comma_opt '}'
1623	{ $$ = DeclarationNode::newEnum( nullptr, $4 )->addQualifiers( $2 ); }
1624	\| ENUM attribute_list_opt no_attr_identifier_or_type_name
1625	{
1626	typedefTable.makeTypedef( *$3 );
1627	$$ = DeclarationNode::newEnum( $3, 0 )->addQualifiers( $2 );
1628	}
1629	\| ENUM attribute_list_opt no_attr_identifier_or_type_name
1630	{ typedefTable.makeTypedef( *$3 ); }
1631	'{' enumerator_list comma_opt '}'
1632	{ $$ = DeclarationNode::newEnum( $3, $6 )->addQualifiers( $2 ); }
1633	;
1634
1635	enumerator_list:
1636	no_attr_identifier_or_type_name enumerator_value_opt
1637	{ $$ = DeclarationNode::newEnumConstant( $1, $2 ); }
1638	\| enumerator_list ',' no_attr_identifier_or_type_name enumerator_value_opt
1639	{ $$ = $1->appendList( DeclarationNode::newEnumConstant( $3, $4 ) ); }
1640	;
1641
1642	enumerator_value_opt:
1643	// empty
1644	{ $$ = nullptr; }
1645	\| '=' constant_expression
1646	{ $$ = $2; }
1647	;
1648
1649	// Minimum of one parameter after which ellipsis is allowed only at the end.
1650
1651	cfa_parameter_type_list_opt: // CFA
1652	// empty
1653	{ $$ = nullptr; }
1654	\| cfa_parameter_type_list
1655	;
1656
1657	cfa_parameter_type_list: // CFA, abstract + real
1658	cfa_abstract_parameter_list
1659	\| cfa_parameter_list
1660	\| cfa_parameter_list pop ',' push cfa_abstract_parameter_list
1661	{ $$ = $1->appendList( $5 ); }
1662	\| cfa_abstract_parameter_list pop ',' push ELLIPSIS
1663	{ $$ = $1->addVarArgs(); }
1664	\| cfa_parameter_list pop ',' push ELLIPSIS
1665	{ $$ = $1->addVarArgs(); }
1666	;
1667
1668	cfa_parameter_list: // CFA
1669	// To obtain LR(1) between cfa_parameter_list and cfa_abstract_tuple, the last cfa_abstract_parameter_list is
1670	// factored out from cfa_parameter_list, flattening the rules to get lookahead to the ']'.
1671	cfa_parameter_declaration
1672	\| cfa_abstract_parameter_list pop ',' push cfa_parameter_declaration
1673	{ $$ = $1->appendList( $5 ); }
1674	\| cfa_parameter_list pop ',' push cfa_parameter_declaration
1675	{ $$ = $1->appendList( $5 ); }
1676	\| cfa_parameter_list pop ',' push cfa_abstract_parameter_list pop ',' push cfa_parameter_declaration
1677	{ $$ = $1->appendList( $5 )->appendList( $9 ); }
1678	;
1679
1680	cfa_abstract_parameter_list: // CFA, new & old style abstract
1681	cfa_abstract_parameter_declaration
1682	\| cfa_abstract_parameter_list pop ',' push cfa_abstract_parameter_declaration
1683	{ $$ = $1->appendList( $5 ); }
1684	;
1685
1686	parameter_type_list_opt:
1687	// empty
1688	{ $$ = nullptr; }
1689	\| parameter_type_list
1690	;
1691
1692	parameter_type_list:
1693	parameter_list
1694	\| parameter_list pop ',' push ELLIPSIS
1695	{ $$ = $1->addVarArgs(); }
1696	;
1697
1698	parameter_list: // abstract + real
1699	abstract_parameter_declaration
1700	\| parameter_declaration
1701	\| parameter_list pop ',' push abstract_parameter_declaration
1702	{ $$ = $1->appendList( $5 ); }
1703	\| parameter_list pop ',' push parameter_declaration
1704	{ $$ = $1->appendList( $5 ); }
1705	;
1706
1707	// Provides optional identifier names (abstract_declarator/variable_declarator), no initialization, different semantics
1708	// for typedef name by using type_parameter_redeclarator instead of typedef_redeclarator, and function prototypes.
1709
1710	cfa_parameter_declaration: // CFA, new & old style parameter declaration
1711	parameter_declaration
1712	\| cfa_identifier_parameter_declarator_no_tuple identifier_or_type_name assignment_opt
1713	{ $$ = $1->addName( $2 ); }
1714	\| cfa_abstract_tuple identifier_or_type_name assignment_opt
1715	// To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator).
1716	{ $$ = $1->addName( $2 ); }
1717	\| type_qualifier_list cfa_abstract_tuple identifier_or_type_name assignment_opt
1718	{ $$ = $2->addName( $3 )->addQualifiers( $1 ); }
1719	\| cfa_function_specifier
1720	;
1721
1722	cfa_abstract_parameter_declaration: // CFA, new & old style parameter declaration
1723	abstract_parameter_declaration
1724	\| cfa_identifier_parameter_declarator_no_tuple
1725	\| cfa_abstract_tuple
1726	// To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator).
1727	\| type_qualifier_list cfa_abstract_tuple
1728	{ $$ = $2->addQualifiers( $1 ); }
1729	\| cfa_abstract_function
1730	;
1731
1732	parameter_declaration:
1733	declaration_specifier identifier_parameter_declarator assignment_opt
1734	{
1735	typedefTable.addToEnclosingScope( TypedefTable::ID );
1736	$$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr );
1737	}
1738	\| declaration_specifier type_parameter_redeclarator assignment_opt
1739	{
1740	typedefTable.addToEnclosingScope( TypedefTable::ID );
1741	$$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr );
1742	}
1743	;
1744
1745	abstract_parameter_declaration:
1746	declaration_specifier
1747	\| declaration_specifier abstract_parameter_declarator
1748	{ $$ = $2->addType( $1 ); }
1749	;
1750
1751	// ISO/IEC 9899:1999 Section 6.9.1(6) : "An identifier declared as a typedef name shall not be redeclared as a
1752	// parameter." Because the scope of the K&R-style parameter-list sees the typedef first, the following is based only on
1753	// identifiers. The ANSI-style parameter-list can redefine a typedef name.
1754
1755	identifier_list: // K&R-style parameter list => no types
1756	no_attr_identifier
1757	{ $$ = DeclarationNode::newName( $1 ); }
1758	\| identifier_list ',' no_attr_identifier
1759	{ $$ = $1->appendList( DeclarationNode::newName( $3 ) ); }
1760	;
1761
1762	identifier_or_type_name:
1763	identifier
1764	\| TYPEDEFname
1765	\| TYPEGENname
1766	;
1767
1768	no_01_identifier_or_type_name:
1769	no_01_identifier
1770	\| TYPEDEFname
1771	\| TYPEGENname
1772	;
1773
1774	no_attr_identifier_or_type_name:
1775	no_attr_identifier
1776	\| TYPEDEFname
1777	\| TYPEGENname
1778	;
1779
1780	type_name_no_function: // sizeof, alignof, cast (constructor)
1781	cfa_abstract_declarator_tuple // CFA
1782	\| type_specifier
1783	\| type_specifier abstract_declarator
1784	{ $$ = $2->addType( $1 ); }
1785	;
1786
1787	type_name: // typeof, assertion
1788	type_name_no_function
1789	\| cfa_abstract_function // CFA
1790	;
1791
1792	initializer_opt:
1793	// empty
1794	{ $$ = nullptr; }
1795	\| '=' initializer
1796	{ $$ = $2; }
1797	\| ATassign initializer
1798	{ $$ = $2->set_maybeConstructed( false ); }
1799	;
1800
1801	initializer:
1802	assignment_expression { $$ = new InitializerNode( $1 ); }
1803	\| '{' initializer_list comma_opt '}' { $$ = new InitializerNode( $2, true ); }
1804	;
1805
1806	initializer_list:
1807	// empty
1808	{ $$ = nullptr; }
1809	\| initializer
1810	\| designation initializer { $$ = $2->set_designators( $1 ); }
1811	\| initializer_list ',' initializer { $$ = (InitializerNode *)( $1->set_last( $3 ) ); }
1812	\| initializer_list ',' designation initializer
1813	{ $$ = (InitializerNode *)( $1->set_last( $4->set_designators( $3 ) ) ); }
1814	;
1815
1816	// There is an unreconcileable parsing problem between C99 and CFA with respect to designators. The problem is use of
1817	// '=' to separator the designator from the initializer value, as in:
1818	//
1819	// int x[10] = { [1] = 3 };
1820	//
1821	// The string "[1] = 3" can be parsed as a designator assignment or a tuple assignment. To disambiguate this case, CFA
1822	// changes the syntax from "=" to ":" as the separator between the designator and initializer. GCC does uses ":" for
1823	// field selection. The optional use of the "=" in GCC, or in this case ":", cannot be supported either due to
1824	// shift/reduce conflicts
1825
1826	designation:
1827	designator_list ':' // C99, CFA uses ":" instead of "="
1828	\| no_attr_identifier_or_type_name ':' // GCC, field name
1829	{ $$ = new ExpressionNode( build_varref( $1 ) ); }
1830	;
1831
1832	designator_list: // C99
1833	designator
1834	\| designator_list designator
1835	{ $$ = (ExpressionNode *)( $1->set_last( $2 ) ); }
1836	//\| designator_list designator { $$ = new ExpressionNode( $1, $2 ); }
1837	;
1838
1839	designator:
1840	'.' no_attr_identifier_or_type_name // C99, field name
1841	{ $$ = new ExpressionNode( build_varref( $2 ) ); }
1842	\| '[' push assignment_expression pop ']' // C99, single array element
1843	// assignment_expression used instead of constant_expression because of shift/reduce conflicts with tuple.
1844	{ $$ = $3; }
1845	\| '[' push subrange pop ']' // CFA, multiple array elements
1846	{ $$ = $3; }
1847	\| '[' push constant_expression ELLIPSIS constant_expression pop ']' // GCC, multiple array elements
1848	{ $$ = new ExpressionNode( build_range( $3, $5 ) ); }
1849	\| '.' '[' push field_list pop ']' // CFA, tuple field selector
1850	{ $$ = $4; }
1851	;
1852
1853	// The CFA type system is based on parametric polymorphism, the ability to declare functions with type parameters,
1854	// rather than an object-oriented type system. This required four groups of extensions:
1855	//
1856	// Overloading: function, data, and operator identifiers may be overloaded.
1857	//
1858	// Type declarations: "type" is used to generate new types for declaring objects. Similarly, "dtype" is used for object
1859	// and incomplete types, and "ftype" is used for function types. Type declarations with initializers provide
1860	// definitions of new types. Type declarations with storage class "extern" provide opaque types.
1861	//
1862	// Polymorphic functions: A forall clause declares a type parameter. The corresponding argument is inferred at the call
1863	// site. A polymorphic function is not a template; it is a function, with an address and a type.
1864	//
1865	// Specifications and Assertions: Specifications are collections of declarations parameterized by one or more
1866	// types. They serve many of the purposes of abstract classes, and specification hierarchies resemble subclass
1867	// hierarchies. Unlike classes, they can define relationships between types. Assertions declare that a type or
1868	// types provide the operations declared by a specification. Assertions are normally used to declare requirements
1869	// on type arguments of polymorphic functions.
1870
1871	typegen_declaration_specifier: // CFA
1872	typegen_type_specifier
1873	\| declaration_qualifier_list typegen_type_specifier
1874	{ $$ = $2->addQualifiers( $1 ); }
1875	\| typegen_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1876	{ $$ = $1->addQualifiers( $2 ); }
1877	\| typegen_declaration_specifier storage_class type_qualifier_list
1878	{ $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1879	;
1880
1881	typegen_type_specifier: // CFA
1882	typegen_name
1883	\| type_qualifier_list typegen_name
1884	{ $$ = $2->addQualifiers( $1 ); }
1885	\| typegen_type_specifier type_qualifier
1886	{ $$ = $1->addQualifiers( $2 ); }
1887	;
1888
1889	typegen_name: // CFA
1890	TYPEGENname '(' type_name_list ')'
1891	{ $$ = DeclarationNode::newFromTypeGen( $1, $3 ); }
1892	;
1893
1894	type_parameter_list: // CFA
1895	type_parameter assignment_opt
1896	\| type_parameter_list ',' type_parameter assignment_opt
1897	{ $$ = $1->appendList( $3 ); }
1898	;
1899
1900	type_parameter: // CFA
1901	type_class no_attr_identifier_or_type_name
1902	{ typedefTable.addToEnclosingScope( *$2, TypedefTable::TD ); }
1903	assertion_list_opt
1904	{ $$ = DeclarationNode::newTypeParam( $1, $2 )->addAssertions( $4 ); }
1905	\| type_specifier identifier_parameter_declarator
1906	;
1907
1908	type_class: // CFA
1909	OTYPE
1910	{ $$ = DeclarationNode::Otype; }
1911	\| DTYPE
1912	{ $$ = DeclarationNode::Dtype; }
1913	\| FTYPE
1914	{ $$ = DeclarationNode::Ftype; }
1915	\| TTYPE
1916	{ $$ = DeclarationNode::Ttype; }
1917	;
1918
1919	assertion_list_opt: // CFA
1920	// empty
1921	{ $$ = nullptr; }
1922	\| assertion_list_opt assertion
1923	{ $$ = $1 ? $1->appendList( $2 ) : $2; }
1924	;
1925
1926	assertion: // CFA
1927	'\|' no_attr_identifier_or_type_name '(' type_name_list ')'
1928	{
1929	typedefTable.openTrait( *$2 );
1930	$$ = DeclarationNode::newTraitUse( $2, $4 );
1931	}
1932	\| '\|' '{' push trait_declaration_list '}'
1933	{ $$ = $4; }
1934	\| '\|' '(' push type_parameter_list pop ')' '{' push trait_declaration_list '}' '(' type_name_list ')'
1935	{ $$ = nullptr; }
1936	;
1937
1938	type_name_list: // CFA
1939	type_name
1940	{ $$ = new ExpressionNode( build_typevalue( $1 ) ); }
1941	\| assignment_expression
1942	\| type_name_list ',' type_name
1943	{ $$ = (ExpressionNode *)( $1->set_last( new ExpressionNode( build_typevalue( $3 ) ) ) ); }
1944	\| type_name_list ',' assignment_expression
1945	{ $$ = (ExpressionNode *)( $1->set_last( $3 )); }
1946	;
1947
1948	type_declaring_list: // CFA
1949	OTYPE type_declarator
1950	{ $$ = $2; }
1951	\| storage_class_list OTYPE type_declarator
1952	{ $$ = $3->addQualifiers( $1 ); }
1953	\| type_declaring_list ',' type_declarator
1954	{ $$ = $1->appendList( $3->copyStorageClasses( $1 ) ); }
1955	;
1956
1957	type_declarator: // CFA
1958	type_declarator_name assertion_list_opt
1959	{ $$ = $1->addAssertions( $2 ); }
1960	\| type_declarator_name assertion_list_opt '=' type_name
1961	{ $$ = $1->addAssertions( $2 )->addType( $4 ); }
1962	;
1963
1964	type_declarator_name: // CFA
1965	no_attr_identifier_or_type_name
1966	{
1967	typedefTable.addToEnclosingScope( *$1, TypedefTable::TD );
1968	$$ = DeclarationNode::newTypeDecl( $1, 0 );
1969	}
1970	\| no_01_identifier_or_type_name '(' push type_parameter_list pop ')'
1971	{
1972	typedefTable.addToEnclosingScope( *$1, TypedefTable::TG );
1973	$$ = DeclarationNode::newTypeDecl( $1, $4 );
1974	}
1975	;
1976
1977	trait_specifier: // CFA
1978	TRAIT no_attr_identifier_or_type_name '(' push type_parameter_list pop ')' '{' '}'
1979	{
1980	typedefTable.addToEnclosingScope( *$2, TypedefTable::ID );
1981	$$ = DeclarationNode::newTrait( $2, $5, 0 );
1982	}
1983	\| TRAIT no_attr_identifier_or_type_name '(' push type_parameter_list pop ')' '{'
1984	{
1985	typedefTable.enterTrait( *$2 );
1986	typedefTable.enterScope();
1987	}
1988	trait_declaration_list '}'
1989	{
1990	typedefTable.leaveTrait();
1991	typedefTable.addToEnclosingScope( *$2, TypedefTable::ID );
1992	$$ = DeclarationNode::newTrait( $2, $5, $10 );
1993	}
1994	;
1995
1996	trait_declaration_list: // CFA
1997	trait_declaration
1998	\| trait_declaration_list push trait_declaration
1999	{ $$ = $1->appendList( $3 ); }
2000	;
2001
2002	trait_declaration: // CFA
2003	cfa_trait_declaring_list pop ';'
2004	\| trait_declaring_list pop ';'
2005	;
2006
2007	cfa_trait_declaring_list: // CFA
2008	cfa_variable_specifier
2009	{
2010	typedefTable.addToEnclosingScope2( TypedefTable::ID );
2011	$$ = $1;
2012	}
2013	\| cfa_function_specifier
2014	{
2015	typedefTable.addToEnclosingScope2( TypedefTable::ID );
2016	$$ = $1;
2017	}
2018	\| cfa_trait_declaring_list pop ',' push identifier_or_type_name
2019	{
2020	typedefTable.addToEnclosingScope2( *$5, TypedefTable::ID );
2021	$$ = $1->appendList( $1->cloneType( $5 ) );
2022	}
2023	;
2024
2025	trait_declaring_list: // CFA
2026	type_specifier declarator
2027	{
2028	typedefTable.addToEnclosingScope2( TypedefTable::ID );
2029	$$ = $2->addType( $1 );
2030	}
2031	\| trait_declaring_list pop ',' push declarator
2032	{
2033	typedefTable.addToEnclosingScope2( TypedefTable::ID );
2034	$$ = $1->appendList( $1->cloneBaseType( $5 ) );
2035	}
2036	;
2037
2038	//*************************** EXTERNAL DEFINITIONS ***************************
2039
2040	translation_unit:
2041	// empty
2042	{} // empty input file
2043	\| external_definition_list
2044	{ parseTree = parseTree ? parseTree->appendList( $1 ) : $1; }
2045	;
2046
2047	external_definition_list:
2048	external_definition
2049	\| external_definition_list push external_definition
2050	{ $$ = $1 ? $1->appendList( $3 ) : $3; }
2051	;
2052
2053	external_definition_list_opt:
2054	// empty
2055	{ $$ = nullptr; }
2056	\| external_definition_list
2057	;
2058
2059	external_definition:
2060	declaration
2061	\| external_function_definition
2062	\| asm_statement // GCC, global assembler statement
2063	\| EXTERN STRINGliteral // C++-style linkage specifier
2064	{
2065	linkageStack.push( linkage ); // handle nested extern "C"/"Cforall"
2066	linkage = LinkageSpec::linkageCheck( $2 );
2067	}
2068	'{' external_definition_list_opt '}'
2069	{
2070	linkage = linkageStack.top();
2071	linkageStack.pop();
2072	$$ = $5;
2073	}
2074	\| EXTENSION external_definition // GCC, multiple __extension__ allowed, meaning unknown
2075	{
2076	distExt( $2 ); // mark all fields in list
2077	$$ = $2;
2078	}
2079	;
2080
2081	external_function_definition:
2082	function_definition
2083	// These rules are a concession to the "implicit int" type_specifier because there is a significant amount of
2084	// legacy code with global functions missing the type-specifier for the return type, and assuming "int".
2085	// Parsing is possible because function_definition does not appear in the context of an expression (nested
2086	// functions preclude this concession, i.e., all nested function must have a return type). A function prototype
2087	// declaration must still have a type_specifier. OBSOLESCENT (see 1)
2088	\| function_declarator compound_statement
2089	{
2090	typedefTable.addToEnclosingScope( TypedefTable::ID );
2091	typedefTable.leaveScope();
2092	$$ = $1->addFunctionBody( $2 );
2093	}
2094	\| KR_function_declarator push KR_declaration_list_opt compound_statement
2095	{
2096	typedefTable.addToEnclosingScope( TypedefTable::ID );
2097	typedefTable.leaveScope();
2098	$$ = $1->addOldDeclList( $3 )->addFunctionBody( $4 );
2099	}
2100	;
2101
2102	function_definition:
2103	cfa_function_declaration compound_statement // CFA
2104	{
2105	typedefTable.addToEnclosingScope( TypedefTable::ID );
2106	typedefTable.leaveScope();
2107	$$ = $1->addFunctionBody( $2 );
2108	}
2109	\| declaration_specifier function_declarator compound_statement
2110	{
2111	typedefTable.addToEnclosingScope( TypedefTable::ID );
2112	typedefTable.leaveScope();
2113	$$ = $2->addFunctionBody( $3 )->addType( $1 );
2114	}
2115	\| type_qualifier_list function_declarator compound_statement
2116	{
2117	typedefTable.addToEnclosingScope( TypedefTable::ID );
2118	typedefTable.leaveScope();
2119	$$ = $2->addFunctionBody( $3 )->addQualifiers( $1 );
2120	}
2121	\| declaration_qualifier_list function_declarator compound_statement
2122	{
2123	typedefTable.addToEnclosingScope( TypedefTable::ID );
2124	typedefTable.leaveScope();
2125	$$ = $2->addFunctionBody( $3 )->addQualifiers( $1 );
2126	}
2127	\| declaration_qualifier_list type_qualifier_list function_declarator compound_statement
2128	{
2129	typedefTable.addToEnclosingScope( TypedefTable::ID );
2130	typedefTable.leaveScope();
2131	$$ = $3->addFunctionBody( $4 )->addQualifiers( $2 )->addQualifiers( $1 );
2132	}
2133
2134	// Old-style K&R function definition, OBSOLESCENT (see 4)
2135	\| declaration_specifier KR_function_declarator push KR_declaration_list_opt compound_statement
2136	{
2137	typedefTable.addToEnclosingScope( TypedefTable::ID );
2138	typedefTable.leaveScope();
2139	$$ = $2->addOldDeclList( $4 )->addFunctionBody( $5 )->addType( $1 );
2140	}
2141	\| type_qualifier_list KR_function_declarator push KR_declaration_list_opt compound_statement
2142	{
2143	typedefTable.addToEnclosingScope( TypedefTable::ID );
2144	typedefTable.leaveScope();
2145	$$ = $2->addOldDeclList( $4 )->addFunctionBody( $5 )->addQualifiers( $1 );
2146	}
2147
2148	// Old-style K&R function definition with "implicit int" type_specifier, OBSOLESCENT (see 4)
2149	\| declaration_qualifier_list KR_function_declarator push KR_declaration_list_opt compound_statement
2150	{
2151	typedefTable.addToEnclosingScope( TypedefTable::ID );
2152	typedefTable.leaveScope();
2153	$$ = $2->addOldDeclList( $4 )->addFunctionBody( $5 )->addQualifiers( $1 );
2154	}
2155	\| declaration_qualifier_list type_qualifier_list KR_function_declarator push KR_declaration_list_opt compound_statement
2156	{
2157	typedefTable.addToEnclosingScope( TypedefTable::ID );
2158	typedefTable.leaveScope();
2159	$$ = $3->addOldDeclList( $5 )->addFunctionBody( $6 )->addQualifiers( $2 )->addQualifiers( $1 );
2160	}
2161	;
2162
2163	declarator:
2164	variable_declarator
2165	\| variable_type_redeclarator
2166	\| function_declarator
2167	;
2168
2169	subrange:
2170	constant_expression '~' constant_expression // CFA, integer subrange
2171	{ $$ = new ExpressionNode( build_range( $1, $3 ) ); }
2172	;
2173
2174	asm_name_opt: // GCC
2175	// empty
2176	{ $$ = nullptr; }
2177	\| ASM '(' string_literal ')' attribute_list_opt
2178	{
2179	DeclarationNode * name = new DeclarationNode();
2180	name->asmName = $3;
2181	$$ = name->addQualifiers( $5 );
2182	}
2183	;
2184
2185	attribute_list_opt: // GCC
2186	// empty
2187	{ $$ = nullptr; }
2188	\| attribute_list
2189	;
2190
2191	attribute_list: // GCC
2192	attribute
2193	\| attribute_list attribute
2194	{ $$ = $2->addQualifiers( $1 ); }
2195	;
2196
2197	attribute: // GCC
2198	ATTRIBUTE '(' '(' attribute_name_list ')' ')'
2199	{ $$ = $4; }
2200	;
2201
2202	attribute_name_list: // GCC
2203	attribute_name
2204	\| attribute_name_list ',' attribute_name
2205	{ $$ = $3->addQualifiers( $1 ); }
2206	;
2207
2208	attribute_name: // GCC
2209	// empty
2210	{ $$ = nullptr; }
2211	\| attr_name
2212	{ $$ = DeclarationNode::newAttribute( $1 ); }
2213	\| attr_name '(' argument_expression_list ')'
2214	{ $$ = DeclarationNode::newAttribute( $1, $3 ); }
2215	;
2216
2217	attr_name: // GCC
2218	IDENTIFIER
2219	\| TYPEDEFname
2220	\| TYPEGENname
2221	\| CONST
2222	{ $$ = Token{ new string( "__const__" ) }; }
2223	;
2224
2225	// ============================================================================
2226	// The following sections are a series of grammar patterns used to parse declarators. Multiple patterns are necessary
2227	// because the type of an identifier in wrapped around the identifier in the same form as its usage in an expression, as
2228	// in:
2229	//
2230	// int (*f())[10] { ... };
2231	// ... (*f())[3] += 1; // definition mimics usage
2232	//
2233	// Because these patterns are highly recursive, changes at a lower level in the recursion require copying some or all of
2234	// the pattern. Each of these patterns has some subtle variation to ensure correct syntax in a particular context.
2235	// ============================================================================
2236
2237	// ----------------------------------------------------------------------------
2238	// The set of valid declarators before a compound statement for defining a function is less than the set of declarators
2239	// to define a variable or function prototype, e.g.:
2240	//
2241	// valid declaration invalid definition
2242	// ----------------- ------------------
2243	// int f; int f {}
2244	// int f; int f {}
2245	// int f[10]; int f[10] {}
2246	// int (f)(int); int (f)(int) {}
2247	//
2248	// To preclude this syntactic anomaly requires separating the grammar rules for variable and function declarators, hence
2249	// variable_declarator and function_declarator.
2250	// ----------------------------------------------------------------------------
2251
2252	// This pattern parses a declaration of a variable that is not redefining a typedef name. The pattern precludes
2253	// declaring an array of functions versus a pointer to an array of functions.
2254
2255	variable_declarator:
2256	paren_identifier attribute_list_opt
2257	{ $$ = $1->addQualifiers( $2 ); }
2258	\| variable_ptr
2259	\| variable_array attribute_list_opt
2260	{ $$ = $1->addQualifiers( $2 ); }
2261	\| variable_function attribute_list_opt
2262	{ $$ = $1->addQualifiers( $2 ); }
2263	;
2264
2265	paren_identifier:
2266	identifier
2267	{
2268	typedefTable.setNextIdentifier( *$1 );
2269	$$ = DeclarationNode::newName( $1 );
2270	}
2271	\| '(' paren_identifier ')' // redundant parenthesis
2272	{ $$ = $2; }
2273	;
2274
2275	variable_ptr:
2276	ptrref_operator variable_declarator
2277	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2278	\| ptrref_operator type_qualifier_list variable_declarator
2279	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2280	\| '(' variable_ptr ')' attribute_list_opt
2281	{ $$ = $2->addQualifiers( $4 ); } // redundant parenthesis
2282	;
2283
2284	variable_array:
2285	paren_identifier array_dimension
2286	{ $$ = $1->addArray( $2 ); }
2287	\| '(' variable_ptr ')' array_dimension
2288	{ $$ = $2->addArray( $4 ); }
2289	\| '(' variable_array ')' multi_array_dimension // redundant parenthesis
2290	{ $$ = $2->addArray( $4 ); }
2291	\| '(' variable_array ')' // redundant parenthesis
2292	{ $$ = $2; }
2293	;
2294
2295	variable_function:
2296	'(' variable_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2297	{ $$ = $2->addParamList( $6 ); }
2298	\| '(' variable_function ')' // redundant parenthesis
2299	{ $$ = $2; }
2300	;
2301
2302	// This pattern parses a function declarator that is not redefining a typedef name. For non-nested functions, there is
2303	// no context where a function definition can redefine a typedef name, i.e., the typedef and function name cannot exist
2304	// is the same scope. The pattern precludes returning arrays and functions versus pointers to arrays and functions.
2305
2306	function_declarator:
2307	function_no_ptr attribute_list_opt
2308	{ $$ = $1->addQualifiers( $2 ); }
2309	\| function_ptr
2310	\| function_array attribute_list_opt
2311	{ $$ = $1->addQualifiers( $2 ); }
2312	;
2313
2314	function_no_ptr:
2315	paren_identifier '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2316	{ $$ = $1->addParamList( $4 ); }
2317	\| '(' function_ptr ')' '(' push parameter_type_list_opt pop ')'
2318	{ $$ = $2->addParamList( $6 ); }
2319	\| '(' function_no_ptr ')' // redundant parenthesis
2320	{ $$ = $2; }
2321	;
2322
2323	function_ptr:
2324	ptrref_operator function_declarator
2325	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2326	\| ptrref_operator type_qualifier_list function_declarator
2327	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2328	\| '(' function_ptr ')'
2329	{ $$ = $2; }
2330	;
2331
2332	function_array:
2333	'(' function_ptr ')' array_dimension
2334	{ $$ = $2->addArray( $4 ); }
2335	\| '(' function_array ')' multi_array_dimension // redundant parenthesis
2336	{ $$ = $2->addArray( $4 ); }
2337	\| '(' function_array ')' // redundant parenthesis
2338	{ $$ = $2; }
2339	;
2340
2341	// This pattern parses an old-style K&R function declarator (OBSOLESCENT, see 4)
2342	//
2343	// f( a, b, c ) int a, *b, c[]; {}
2344	//
2345	// that is not redefining a typedef name (see function_declarator for additional comments). The pattern precludes
2346	// returning arrays and functions versus pointers to arrays and functions.
2347
2348	KR_function_declarator:
2349	KR_function_no_ptr
2350	\| KR_function_ptr
2351	\| KR_function_array
2352	;
2353
2354	KR_function_no_ptr:
2355	paren_identifier '(' identifier_list ')' // function_declarator handles empty parameter
2356	{ $$ = $1->addIdList( $3 ); }
2357	\| '(' KR_function_ptr ')' '(' push parameter_type_list_opt pop ')'
2358	{ $$ = $2->addParamList( $6 ); }
2359	\| '(' KR_function_no_ptr ')' // redundant parenthesis
2360	{ $$ = $2; }
2361	;
2362
2363	KR_function_ptr:
2364	ptrref_operator KR_function_declarator
2365	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2366	\| ptrref_operator type_qualifier_list KR_function_declarator
2367	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2368	\| '(' KR_function_ptr ')'
2369	{ $$ = $2; }
2370	;
2371
2372	KR_function_array:
2373	'(' KR_function_ptr ')' array_dimension
2374	{ $$ = $2->addArray( $4 ); }
2375	\| '(' KR_function_array ')' multi_array_dimension // redundant parenthesis
2376	{ $$ = $2->addArray( $4 ); }
2377	\| '(' KR_function_array ')' // redundant parenthesis
2378	{ $$ = $2; }
2379	;
2380
2381	// This pattern parses a declaration for a variable or function prototype that redefines a type name, e.g.:
2382	//
2383	// typedef int foo;
2384	// {
2385	// int foo; // redefine typedef name in new scope
2386	// }
2387	//
2388	// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
2389	// and functions versus pointers to arrays and functions.
2390
2391	variable_type_redeclarator:
2392	paren_type attribute_list_opt
2393	{ $$ = $1->addQualifiers( $2 ); }
2394	\| type_ptr
2395	\| type_array attribute_list_opt
2396	{ $$ = $1->addQualifiers( $2 ); }
2397	\| type_function attribute_list_opt
2398	{ $$ = $1->addQualifiers( $2 ); }
2399	;
2400
2401	paren_type:
2402	typedef
2403	\| '(' paren_type ')'
2404	{ $$ = $2; }
2405	;
2406
2407	type_ptr:
2408	ptrref_operator variable_type_redeclarator
2409	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2410	\| ptrref_operator type_qualifier_list variable_type_redeclarator
2411	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2412	\| '(' type_ptr ')' attribute_list_opt
2413	{ $$ = $2->addQualifiers( $4 ); }
2414	;
2415
2416	type_array:
2417	paren_type array_dimension
2418	{ $$ = $1->addArray( $2 ); }
2419	\| '(' type_ptr ')' array_dimension
2420	{ $$ = $2->addArray( $4 ); }
2421	\| '(' type_array ')' multi_array_dimension // redundant parenthesis
2422	{ $$ = $2->addArray( $4 ); }
2423	\| '(' type_array ')' // redundant parenthesis
2424	{ $$ = $2; }
2425	;
2426
2427	type_function:
2428	paren_type '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2429	{ $$ = $1->addParamList( $4 ); }
2430	\| '(' type_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2431	{ $$ = $2->addParamList( $6 ); }
2432	\| '(' type_function ')' // redundant parenthesis
2433	{ $$ = $2; }
2434	;
2435
2436	// This pattern parses a declaration for a parameter variable of a function prototype or actual that is not redefining a
2437	// typedef name and allows the C99 array options, which can only appear in a parameter list. The pattern precludes
2438	// declaring an array of functions versus a pointer to an array of functions, and returning arrays and functions versus
2439	// pointers to arrays and functions.
2440
2441	identifier_parameter_declarator:
2442	paren_identifier attribute_list_opt
2443	{ $$ = $1->addQualifiers( $2 ); }
2444	\| identifier_parameter_ptr
2445	\| identifier_parameter_array attribute_list_opt
2446	{ $$ = $1->addQualifiers( $2 ); }
2447	\| identifier_parameter_function attribute_list_opt
2448	{ $$ = $1->addQualifiers( $2 ); }
2449	;
2450
2451	identifier_parameter_ptr:
2452	ptrref_operator identifier_parameter_declarator
2453	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2454	\| ptrref_operator type_qualifier_list identifier_parameter_declarator
2455	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2456	\| '(' identifier_parameter_ptr ')' attribute_list_opt
2457	{ $$ = $2->addQualifiers( $4 ); }
2458	;
2459
2460	identifier_parameter_array:
2461	paren_identifier array_parameter_dimension
2462	{ $$ = $1->addArray( $2 ); }
2463	\| '(' identifier_parameter_ptr ')' array_dimension
2464	{ $$ = $2->addArray( $4 ); }
2465	\| '(' identifier_parameter_array ')' multi_array_dimension // redundant parenthesis
2466	{ $$ = $2->addArray( $4 ); }
2467	\| '(' identifier_parameter_array ')' // redundant parenthesis
2468	{ $$ = $2; }
2469	;
2470
2471	identifier_parameter_function:
2472	paren_identifier '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2473	{ $$ = $1->addParamList( $4 ); }
2474	\| '(' identifier_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2475	{ $$ = $2->addParamList( $6 ); }
2476	\| '(' identifier_parameter_function ')' // redundant parenthesis
2477	{ $$ = $2; }
2478	;
2479
2480	// This pattern parses a declaration for a parameter variable or function prototype that is redefining a typedef name,
2481	// e.g.:
2482	//
2483	// typedef int foo;
2484	// int f( int foo ); // redefine typedef name in new scope
2485	//
2486	// and allows the C99 array options, which can only appear in a parameter list.
2487
2488	type_parameter_redeclarator:
2489	typedef attribute_list_opt
2490	{ $$ = $1->addQualifiers( $2 ); }
2491	\| type_parameter_ptr
2492	\| type_parameter_array attribute_list_opt
2493	{ $$ = $1->addQualifiers( $2 ); }
2494	\| type_parameter_function attribute_list_opt
2495	{ $$ = $1->addQualifiers( $2 ); }
2496	;
2497
2498	typedef:
2499	TYPEDEFname
2500	{
2501	typedefTable.setNextIdentifier( *$1 );
2502	$$ = DeclarationNode::newName( $1 );
2503	}
2504	\| TYPEGENname
2505	{
2506	typedefTable.setNextIdentifier( *$1 );
2507	$$ = DeclarationNode::newName( $1 );
2508	}
2509	;
2510
2511	type_parameter_ptr:
2512	ptrref_operator type_parameter_redeclarator
2513	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2514	\| ptrref_operator type_qualifier_list type_parameter_redeclarator
2515	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2516	\| '(' type_parameter_ptr ')' attribute_list_opt
2517	{ $$ = $2->addQualifiers( $4 ); }
2518	;
2519
2520	type_parameter_array:
2521	typedef array_parameter_dimension
2522	{ $$ = $1->addArray( $2 ); }
2523	\| '(' type_parameter_ptr ')' array_parameter_dimension
2524	{ $$ = $2->addArray( $4 ); }
2525	;
2526
2527	type_parameter_function:
2528	typedef '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2529	{ $$ = $1->addParamList( $4 ); }
2530	\| '(' type_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2531	{ $$ = $2->addParamList( $6 ); }
2532	;
2533
2534	// This pattern parses a declaration of an abstract variable or function prototype, i.e., there is no identifier to
2535	// which the type applies, e.g.:
2536	//
2537	// sizeof( int );
2538	// sizeof( int * );
2539	// sizeof( int [10] );
2540	// sizeof( int (*)() );
2541	// sizeof( int () );
2542	//
2543	// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
2544	// and functions versus pointers to arrays and functions.
2545
2546	abstract_declarator:
2547	abstract_ptr
2548	\| abstract_array attribute_list_opt
2549	{ $$ = $1->addQualifiers( $2 ); }
2550	\| abstract_function attribute_list_opt
2551	{ $$ = $1->addQualifiers( $2 ); }
2552	;
2553
2554	abstract_ptr:
2555	ptrref_operator
2556	{ $$ = DeclarationNode::newPointer( 0 ); }
2557	\| ptrref_operator type_qualifier_list
2558	{ $$ = DeclarationNode::newPointer( $2 ); }
2559	\| ptrref_operator abstract_declarator
2560	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2561	\| ptrref_operator type_qualifier_list abstract_declarator
2562	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2563	\| '(' abstract_ptr ')' attribute_list_opt
2564	{ $$ = $2->addQualifiers( $4 ); }
2565	;
2566
2567	abstract_array:
2568	array_dimension
2569	\| '(' abstract_ptr ')' array_dimension
2570	{ $$ = $2->addArray( $4 ); }
2571	\| '(' abstract_array ')' multi_array_dimension // redundant parenthesis
2572	{ $$ = $2->addArray( $4 ); }
2573	\| '(' abstract_array ')' // redundant parenthesis
2574	{ $$ = $2; }
2575	;
2576
2577	abstract_function:
2578	'(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2579	{ $$ = DeclarationNode::newFunction( nullptr, nullptr, $3, nullptr ); }
2580	\| '(' abstract_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2581	{ $$ = $2->addParamList( $6 ); }
2582	\| '(' abstract_function ')' // redundant parenthesis
2583	{ $$ = $2; }
2584	;
2585
2586	array_dimension:
2587	// Only the first dimension can be empty.
2588	'[' ']'
2589	{ $$ = DeclarationNode::newArray( 0, 0, false ); }
2590	\| '[' ']' multi_array_dimension
2591	{ $$ = DeclarationNode::newArray( 0, 0, false )->addArray( $3 ); }
2592	\| multi_array_dimension
2593	;
2594
2595	multi_array_dimension:
2596	'[' push assignment_expression pop ']'
2597	{ $$ = DeclarationNode::newArray( $3, 0, false ); }
2598	\| '[' push '*' pop ']' // C99
2599	{ $$ = DeclarationNode::newVarArray( 0 ); }
2600	\| multi_array_dimension '[' push assignment_expression pop ']'
2601	{ $$ = $1->addArray( DeclarationNode::newArray( $4, 0, false ) ); }
2602	\| multi_array_dimension '[' push '*' pop ']' // C99
2603	{ $$ = $1->addArray( DeclarationNode::newVarArray( 0 ) ); }
2604	;
2605
2606	// This pattern parses a declaration of a parameter abstract variable or function prototype, i.e., there is no
2607	// identifier to which the type applies, e.g.:
2608	//
2609	// int f( int ); // not handled here
2610	// int f( int * ); // abstract function-prototype parameter; no parameter name specified
2611	// int f( int (*)() ); // abstract function-prototype parameter; no parameter name specified
2612	// int f( int (int) ); // abstract function-prototype parameter; no parameter name specified
2613	//
2614	// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
2615	// and functions versus pointers to arrays and functions. In addition, the pattern handles the
2616	// special meaning of parenthesis around a typedef name:
2617	//
2618	// ISO/IEC 9899:1999 Section 6.7.5.3(11) : "In a parameter declaration, a single typedef name in
2619	// parentheses is taken to be an abstract declarator that specifies a function with a single parameter,
2620	// not as redundant parentheses around the identifier."
2621	//
2622	// For example:
2623	//
2624	// typedef float T;
2625	// int f( int ( T [5] ) ); // see abstract_parameter_declarator
2626	// int g( int ( T ( int ) ) ); // see abstract_parameter_declarator
2627	// int f( int f1( T a[5] ) ); // see identifier_parameter_declarator
2628	// int g( int g1( T g2( int p ) ) ); // see identifier_parameter_declarator
2629	//
2630	// In essence, a '(' immediately to the left of typedef name, T, is interpreted as starting a parameter type list, and
2631	// not as redundant parentheses around a redeclaration of T. Finally, the pattern also precludes declaring an array of
2632	// functions versus a pointer to an array of functions, and returning arrays and functions versus pointers to arrays and
2633	// functions.
2634
2635	abstract_parameter_declarator:
2636	abstract_parameter_ptr
2637	\| abstract_parameter_array attribute_list_opt
2638	{ $$ = $1->addQualifiers( $2 ); }
2639	\| abstract_parameter_function attribute_list_opt
2640	{ $$ = $1->addQualifiers( $2 ); }
2641	;
2642
2643	abstract_parameter_ptr:
2644	ptrref_operator
2645	{ $$ = DeclarationNode::newPointer( nullptr ); }
2646	\| ptrref_operator type_qualifier_list
2647	{ $$ = DeclarationNode::newPointer( $2 ); }
2648	\| ptrref_operator abstract_parameter_declarator
2649	{ $$ = $2->addPointer( DeclarationNode::newPointer( nullptr ) ); }
2650	\| ptrref_operator type_qualifier_list abstract_parameter_declarator
2651	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2652	\| '(' abstract_parameter_ptr ')' attribute_list_opt
2653	{ $$ = $2->addQualifiers( $4 ); }
2654	;
2655
2656	abstract_parameter_array:
2657	array_parameter_dimension
2658	\| '(' abstract_parameter_ptr ')' array_parameter_dimension
2659	{ $$ = $2->addArray( $4 ); }
2660	\| '(' abstract_parameter_array ')' multi_array_dimension // redundant parenthesis
2661	{ $$ = $2->addArray( $4 ); }
2662	\| '(' abstract_parameter_array ')' // redundant parenthesis
2663	{ $$ = $2; }
2664	;
2665
2666	abstract_parameter_function:
2667	'(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2668	{ $$ = DeclarationNode::newFunction( nullptr, nullptr, $3, nullptr ); }
2669	\| '(' abstract_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2670	{ $$ = $2->addParamList( $6 ); }
2671	\| '(' abstract_parameter_function ')' // redundant parenthesis
2672	{ $$ = $2; }
2673	;
2674
2675	array_parameter_dimension:
2676	// Only the first dimension can be empty or have qualifiers.
2677	array_parameter_1st_dimension
2678	\| array_parameter_1st_dimension multi_array_dimension
2679	{ $$ = $1->addArray( $2 ); }
2680	\| multi_array_dimension
2681	;
2682
2683	// The declaration of an array parameter has additional syntax over arrays in normal variable declarations:
2684	//
2685	// ISO/IEC 9899:1999 Section 6.7.5.2(1) : "The optional type qualifiers and the keyword static shall appear only in
2686	// a declaration of a function parameter with an array type, and then only in the outermost array type derivation."
2687
2688	array_parameter_1st_dimension:
2689	'[' ']'
2690	{ $$ = DeclarationNode::newArray( 0, 0, false ); }
2691	// multi_array_dimension handles the '[' '*' ']' case
2692	\| '[' push type_qualifier_list '*' pop ']' // remaining C99
2693	{ $$ = DeclarationNode::newVarArray( $3 ); }
2694	\| '[' push type_qualifier_list pop ']'
2695	{ $$ = DeclarationNode::newArray( 0, $3, false ); }
2696	// multi_array_dimension handles the '[' assignment_expression ']' case
2697	\| '[' push type_qualifier_list assignment_expression pop ']'
2698	{ $$ = DeclarationNode::newArray( $4, $3, false ); }
2699	\| '[' push STATIC type_qualifier_list_opt assignment_expression pop ']'
2700	{ $$ = DeclarationNode::newArray( $5, $4, true ); }
2701	\| '[' push type_qualifier_list STATIC assignment_expression pop ']'
2702	{ $$ = DeclarationNode::newArray( $5, $3, true ); }
2703	;
2704
2705	// This pattern parses a declaration of an abstract variable, but does not allow "int ()" for a function pointer.
2706	//
2707	// struct S {
2708	// int;
2709	// int *;
2710	// int [10];
2711	// int (*)();
2712	// };
2713
2714	variable_abstract_declarator:
2715	variable_abstract_ptr
2716	\| variable_abstract_array attribute_list_opt
2717	{ $$ = $1->addQualifiers( $2 ); }
2718	\| variable_abstract_function attribute_list_opt
2719	{ $$ = $1->addQualifiers( $2 ); }
2720	;
2721
2722	variable_abstract_ptr:
2723	ptrref_operator
2724	{ $$ = DeclarationNode::newPointer( 0 ); }
2725	\| ptrref_operator type_qualifier_list
2726	{ $$ = DeclarationNode::newPointer( $2 ); }
2727	\| ptrref_operator variable_abstract_declarator
2728	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2729	\| ptrref_operator type_qualifier_list variable_abstract_declarator
2730	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2731	\| '(' variable_abstract_ptr ')' attribute_list_opt
2732	{ $$ = $2->addQualifiers( $4 ); }
2733	;
2734
2735	variable_abstract_array:
2736	array_dimension
2737	\| '(' variable_abstract_ptr ')' array_dimension
2738	{ $$ = $2->addArray( $4 ); }
2739	\| '(' variable_abstract_array ')' multi_array_dimension // redundant parenthesis
2740	{ $$ = $2->addArray( $4 ); }
2741	\| '(' variable_abstract_array ')' // redundant parenthesis
2742	{ $$ = $2; }
2743	;
2744
2745	variable_abstract_function:
2746	'(' variable_abstract_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2747	{ $$ = $2->addParamList( $6 ); }
2748	\| '(' variable_abstract_function ')' // redundant parenthesis
2749	{ $$ = $2; }
2750	;
2751
2752	// This pattern parses a new-style declaration for a parameter variable or function prototype that is either an
2753	// identifier or typedef name and allows the C99 array options, which can only appear in a parameter list.
2754
2755	cfa_identifier_parameter_declarator_tuple: // CFA
2756	cfa_identifier_parameter_declarator_no_tuple
2757	\| cfa_abstract_tuple
2758	\| type_qualifier_list cfa_abstract_tuple
2759	{ $$ = $2->addQualifiers( $1 ); }
2760	;
2761
2762	cfa_identifier_parameter_declarator_no_tuple: // CFA
2763	cfa_identifier_parameter_ptr
2764	\| cfa_identifier_parameter_array
2765	;
2766
2767	cfa_identifier_parameter_ptr: // CFA
2768	ptrref_operator type_specifier
2769	{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0 ) ); }
2770	\| type_qualifier_list ptrref_operator type_specifier
2771	{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1 ) ); }
2772	\| ptrref_operator cfa_abstract_function
2773	{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0 ) ); }
2774	\| type_qualifier_list ptrref_operator cfa_abstract_function
2775	{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1 ) ); }
2776	\| ptrref_operator cfa_identifier_parameter_declarator_tuple
2777	{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0 ) ); }
2778	\| type_qualifier_list ptrref_operator cfa_identifier_parameter_declarator_tuple
2779	{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1 ) ); }
2780	;
2781
2782	cfa_identifier_parameter_array: // CFA
2783	// Only the first dimension can be empty or have qualifiers. Empty dimension must be factored out due to
2784	// shift/reduce conflict with new-style empty (void) function return type.
2785	'[' ']' type_specifier
2786	{ $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
2787	\| cfa_array_parameter_1st_dimension type_specifier
2788	{ $$ = $2->addNewArray( $1 ); }
2789	\| '[' ']' multi_array_dimension type_specifier
2790	{ $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
2791	\| cfa_array_parameter_1st_dimension multi_array_dimension type_specifier
2792	{ $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
2793	\| multi_array_dimension type_specifier
2794	{ $$ = $2->addNewArray( $1 ); }
2795
2796	\| '[' ']' cfa_identifier_parameter_ptr
2797	{ $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
2798	\| cfa_array_parameter_1st_dimension cfa_identifier_parameter_ptr
2799	{ $$ = $2->addNewArray( $1 ); }
2800	\| '[' ']' multi_array_dimension cfa_identifier_parameter_ptr
2801	{ $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
2802	\| cfa_array_parameter_1st_dimension multi_array_dimension cfa_identifier_parameter_ptr
2803	{ $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
2804	\| multi_array_dimension cfa_identifier_parameter_ptr
2805	{ $$ = $2->addNewArray( $1 ); }
2806	;
2807
2808	cfa_array_parameter_1st_dimension:
2809	'[' push type_qualifier_list '*' pop ']' // remaining C99
2810	{ $$ = DeclarationNode::newVarArray( $3 ); }
2811	\| '[' push type_qualifier_list assignment_expression pop ']'
2812	{ $$ = DeclarationNode::newArray( $4, $3, false ); }
2813	\| '[' push declaration_qualifier_list assignment_expression pop ']'
2814	// declaration_qualifier_list must be used because of shift/reduce conflict with
2815	// assignment_expression, so a semantic check is necessary to preclude them as a type_qualifier cannot
2816	// appear in this context.
2817	{ $$ = DeclarationNode::newArray( $4, $3, true ); }
2818	\| '[' push declaration_qualifier_list type_qualifier_list assignment_expression pop ']'
2819	{ $$ = DeclarationNode::newArray( $5, $4->addQualifiers( $3 ), true ); }
2820	;
2821
2822	// This pattern parses a new-style declaration of an abstract variable or function prototype, i.e., there is no
2823	// identifier to which the type applies, e.g.:
2824	//
2825	// [int] f( int ); // abstract variable parameter; no parameter name specified
2826	// [int] f( [int] (int) ); // abstract function-prototype parameter; no parameter name specified
2827	//
2828	// These rules need LR(3):
2829	//
2830	// cfa_abstract_tuple identifier_or_type_name
2831	// '[' cfa_parameter_list ']' identifier_or_type_name '(' cfa_parameter_type_list_opt ')'
2832	//
2833	// since a function return type can be syntactically identical to a tuple type:
2834	//
2835	// [int, int] t;
2836	// [int, int] f( int );
2837	//
2838	// Therefore, it is necessary to look at the token after identifier_or_type_name to know when to reduce
2839	// cfa_abstract_tuple. To make this LR(1), several rules have to be flattened (lengthened) to allow the necessary
2840	// lookahead. To accomplish this, cfa_abstract_declarator has an entry point without tuple, and tuple declarations are
2841	// duplicated when appearing with cfa_function_specifier.
2842
2843	cfa_abstract_declarator_tuple: // CFA
2844	cfa_abstract_tuple
2845	\| type_qualifier_list cfa_abstract_tuple
2846	{ $$ = $2->addQualifiers( $1 ); }
2847	\| cfa_abstract_declarator_no_tuple
2848	;
2849
2850	cfa_abstract_declarator_no_tuple: // CFA
2851	cfa_abstract_ptr
2852	\| cfa_abstract_array
2853	;
2854
2855	cfa_abstract_ptr: // CFA
2856	ptrref_operator type_specifier
2857	{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0 ) ); }
2858	\| type_qualifier_list ptrref_operator type_specifier
2859	{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1 ) ); }
2860	\| ptrref_operator cfa_abstract_function
2861	{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0 ) ); }
2862	\| type_qualifier_list ptrref_operator cfa_abstract_function
2863	{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1 ) ); }
2864	\| ptrref_operator cfa_abstract_declarator_tuple
2865	{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0 ) ); }
2866	\| type_qualifier_list ptrref_operator cfa_abstract_declarator_tuple
2867	{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1 ) ); }
2868	;
2869
2870	cfa_abstract_array: // CFA
2871	// Only the first dimension can be empty. Empty dimension must be factored out due to shift/reduce conflict with
2872	// empty (void) function return type.
2873	'[' ']' type_specifier
2874	{ $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
2875	\| '[' ']' multi_array_dimension type_specifier
2876	{ $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
2877	\| multi_array_dimension type_specifier
2878	{ $$ = $2->addNewArray( $1 ); }
2879	\| '[' ']' cfa_abstract_ptr
2880	{ $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
2881	\| '[' ']' multi_array_dimension cfa_abstract_ptr
2882	{ $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
2883	\| multi_array_dimension cfa_abstract_ptr
2884	{ $$ = $2->addNewArray( $1 ); }
2885	;
2886
2887	cfa_abstract_tuple: // CFA
2888	'[' push cfa_abstract_parameter_list pop ']'
2889	{ $$ = DeclarationNode::newTuple( $3 ); }
2890	;
2891
2892	cfa_abstract_function: // CFA
2893	// '[' ']' '(' cfa_parameter_type_list_opt ')'
2894	// { $$ = DeclarationNode::newFunction( nullptr, DeclarationNode::newTuple( nullptr ), $4, nullptr ); }
2895	cfa_abstract_tuple '(' push cfa_parameter_type_list_opt pop ')'
2896	{ $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
2897	\| cfa_function_return '(' push cfa_parameter_type_list_opt pop ')'
2898	{ $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
2899	;
2900
2901	// 1) ISO/IEC 9899:1999 Section 6.7.2(2) : "At least one type specifier shall be given in the declaration specifiers in
2902	// each declaration, and in the specifier-qualifier list in each structure declaration and type name."
2903	//
2904	// 2) ISO/IEC 9899:1999 Section 6.11.5(1) : "The placement of a storage-class specifier other than at the beginning of
2905	// the declaration specifiers in a declaration is an obsolescent feature."
2906	//
2907	// 3) ISO/IEC 9899:1999 Section 6.11.6(1) : "The use of function declarators with empty parentheses (not
2908	// prototype-format parameter type declarators) is an obsolescent feature."
2909	//
2910	// 4) ISO/IEC 9899:1999 Section 6.11.7(1) : "The use of function definitions with separate parameter identifier and
2911	// declaration lists (not prototype-format parameter type and identifier declarators) is an obsolescent feature.
2912
2913	//*********************** MISCELLANEOUS ******************************
2914
2915	comma_opt: // redundant comma
2916	// empty
2917	\| ','
2918	;
2919
2920	assignment_opt:
2921	// empty
2922	{ $$ = nullptr; }
2923	\| '=' assignment_expression
2924	{ $$ = $2; }
2925	;
2926
2927	extension_opt:
2928	// empty
2929	{ $$ = false; }
2930	\| EXTENSION // GCC
2931	{ $$ = true; }
2932	;
2933
2934	%%
2935	// ----end of grammar----
2936
2937	extern char *yytext;
2938
2939	void yyerror( const char * ) {
2940	cout << "Error ";
2941	if ( yyfilename ) {
2942	cout << "in file " << yyfilename << " ";
2943	} // if
2944	cout << "at line " << yylineno << " reading token \"" << (yytext[0] == '\0' ? "EOF" : yytext) << "\"" << endl;
2945	}
2946
2947	// Local Variables: //
2948	// mode: c++ //
2949	// tab-width: 4 //
2950	// compile-command: "make install" //
2951	// End: //

Note: See TracBrowser for help on using the repository browser.

Download in other formats:

Original Format