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parser.yy @ bf30ab3

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Last change on this file since bf30ab3 was 9a1e509, checked in by Rob Schluntz <rschlunt@…>, 7 years ago
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1	//
2	// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
3	//
4	// The contents of this file are covered under the licence agreement in the
5	// file "LICENCE" distributed with Cforall.
6	//
7	// parser.yy --
8	//
9	// Author : Peter A. Buhr
10	// Created On : Sat Sep 1 20:22:55 2001
11	// Last Modified By : Peter A. Buhr
12	// Last Modified On : Wed Jul 12 18:23:36 2017
13	// Update Count : 2426
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 "ParseNode.h"
51	#include "TypedefTable.h"
52	#include "TypeData.h"
53	#include "LinkageSpec.h"
54	using namespace std;
55
56	extern DeclarationNode * parseTree;
57	extern LinkageSpec::Spec linkage;
58	extern TypedefTable typedefTable;
59
60	stack< LinkageSpec::Spec > linkageStack;
61
62	void appendStr( string to, string from ) {
63	// "abc" "def" "ghi" => "abcdefghi", remove new text from quotes and insert before last quote in old string.
64	to->insert( to->length() - 1, from->substr( 1, from->length() - 2 ) );
65	} // appendStr
66
67	DeclarationNode * distAttr( DeclarationNode * specifier, DeclarationNode * declList ) {
68	// distribute declaration_specifier across all declared variables, e.g., static, const, __attribute__.
69	DeclarationNode * cur = declList, * cl = (new DeclarationNode)->addType( specifier );
70	//cur->addType( specifier );
71	for ( cur = dynamic_cast< DeclarationNode * >( cur->get_next() ); cur != nullptr; cur = dynamic_cast< DeclarationNode * >( cur->get_next() ) ) {
72	cl->cloneBaseType( cur );
73	} // for
74	declList->addType( cl );
75	// delete cl;
76	return declList;
77	} // distAttr
78
79	void distExt( DeclarationNode * declaration ) {
80	// distribute EXTENSION across all declarations
81	for ( DeclarationNode iter = declaration; iter != nullptr; iter = (DeclarationNode )iter->get_next() ) {
82	iter->set_extension( true );
83	} // for
84	} // distExt
85
86	bool forall = false; // aggregate have one or more forall qualifiers ?
87	%}
88
89	// Types declaration
90	%union
91	{
92	Token tok;
93	ParseNode * pn;
94	ExpressionNode * en;
95	DeclarationNode * decl;
96	DeclarationNode::Aggregate aggKey;
97	DeclarationNode::TypeClass tclass;
98	StatementNode * sn;
99	ConstantExpr * constant;
100	ForCtl * fctl;
101	LabelNode * label;
102	InitializerNode * in;
103	OperKinds op;
104	std::string * str;
105	bool flag;
106	CatchStmt::Kind catch_kind;
107	}
108
109	//*********************** TERMINAL TOKENS ******************************
110
111	// keywords
112	%token TYPEDEF
113	%token EXTERN STATIC AUTO REGISTER
114	%token THREADLOCAL // C11
115	%token INLINE FORTRAN // C99, extension ISO/IEC 9899:1999 Section J.5.9(1)
116	%token NORETURN // C11
117	%token CONST VOLATILE
118	%token RESTRICT // C99
119	%token ATOMIC // C11
120	%token FORALL LVALUE MUTEX // CFA
121	%token VOID CHAR SHORT INT LONG FLOAT DOUBLE SIGNED UNSIGNED ZERO_T ONE_T
122	%token VALIST // GCC
123	%token BOOL COMPLEX IMAGINARY // C99
124	%token TYPEOF LABEL // GCC
125	%token ENUM STRUCT UNION
126	%token COROUTINE MONITOR THREAD // CFA
127	%token OTYPE FTYPE DTYPE TTYPE TRAIT // CFA
128	%token SIZEOF OFFSETOF
129	%token ATTRIBUTE EXTENSION // GCC
130	%token IF ELSE SWITCH CASE DEFAULT DO WHILE FOR BREAK CONTINUE GOTO RETURN
131	%token CHOOSE DISABLE ENABLE FALLTHRU TRY CATCH CATCHRESUME FINALLY THROW THROWRESUME AT WITH // CFA
132	%token ASM // C99, extension ISO/IEC 9899:1999 Section J.5.10(1)
133	%token ALIGNAS ALIGNOF GENERIC STATICASSERT // C11
134
135	// names and constants: lexer differentiates between identifier and typedef names
136	%token<tok> IDENTIFIER QUOTED_IDENTIFIER TYPEDEFname TYPEGENname
137	%token<tok> ATTR_IDENTIFIER ATTR_TYPEDEFname ATTR_TYPEGENname
138	%token<tok> INTEGERconstant CHARACTERconstant STRINGliteral
139	// Floating point constant is broken into three kinds of tokens because of the ambiguity with tuple indexing and
140	// overloading constants 0/1, e.g., x.1 is lexed as (x)(.1), where (.1) is a factional constant, but is semantically
141	// converted into the tuple index (.)(1). e.g., 3.x
142	%token<tok> REALDECIMALconstant REALFRACTIONconstant FLOATINGconstant
143	%token<tok> ZERO ONE // CFA
144
145	// multi-character operators
146	%token ARROW // ->
147	%token ICR DECR // ++ --
148	%token LS RS // << >>
149	%token LE GE EQ NE // <= >= == !=
150	%token ANDAND OROR // && \|\|
151	%token ELLIPSIS // ...
152
153	%token MULTassign DIVassign MODassign // *= /= %=/
154	%token PLUSassign MINUSassign // += -=
155	%token LSassign RSassign // <<= >>=
156	%token ANDassign ERassign ORassign // &= ^= \|=
157
158	%token ATassign // @=
159
160	%type<tok> identifier no_attr_identifier zero_one
161	%type<tok> identifier_or_type_name no_attr_identifier_or_type_name attr_name
162	%type<constant> string_literal
163	%type<str> string_literal_list
164
165	// expressions
166	%type<en> constant
167	%type<en> tuple tuple_expression_list
168	%type<op> ptrref_operator unary_operator assignment_operator
169	%type<en> primary_expression postfix_expression unary_expression
170	%type<en> cast_expression multiplicative_expression additive_expression shift_expression
171	%type<en> relational_expression equality_expression AND_expression exclusive_OR_expression
172	%type<en> inclusive_OR_expression logical_AND_expression logical_OR_expression conditional_expression
173	%type<en> constant_expression assignment_expression assignment_expression_opt
174	%type<en> comma_expression comma_expression_opt
175	%type<en> argument_expression_list argument_expression assignment_opt
176	%type<fctl> for_control_expression
177	%type<en> subrange
178	%type<decl> asm_name_opt
179	%type<en> asm_operands_opt asm_operands_list asm_operand
180	%type<label> label_list
181	%type<en> asm_clobbers_list_opt
182	%type<flag> asm_volatile_opt
183
184	// statements
185	%type<sn> labeled_statement compound_statement expression_statement selection_statement
186	%type<sn> iteration_statement jump_statement
187	%type<sn> with_statement exception_statement asm_statement
188	%type<sn> fall_through_opt fall_through
189	%type<sn> statement statement_list
190	%type<sn> block_item_list block_item
191	%type<sn> with_clause_opt
192	%type<en> case_value
193	%type<sn> case_clause case_value_list case_label case_label_list
194	%type<sn> switch_clause_list_opt switch_clause_list choose_clause_list_opt choose_clause_list
195	%type<sn> /* handler_list */ handler_clause finally_clause
196	%type<catch_kind> handler_key
197
198	// declarations
199	%type<decl> abstract_declarator abstract_ptr abstract_array abstract_function array_dimension multi_array_dimension
200	%type<decl> abstract_parameter_declarator abstract_parameter_ptr abstract_parameter_array abstract_parameter_function array_parameter_dimension array_parameter_1st_dimension
201	%type<decl> abstract_parameter_declaration
202
203	%type<aggKey> aggregate_key
204	%type<decl> aggregate_type aggregate_type_nobody
205
206	%type<decl> assertion assertion_list_opt
207
208	%type<en> bit_subrange_size_opt bit_subrange_size
209
210	%type<decl> basic_declaration_specifier basic_type_name basic_type_specifier direct_type indirect_type
211
212	%type<decl> trait_declaration trait_declaration_list trait_declaring_list trait_specifier
213
214	%type<decl> declaration declaration_list declaration_list_opt declaration_qualifier_list
215	%type<decl> declaration_specifier declaration_specifier_nobody declarator declaring_list
216
217	%type<decl> elaborated_type elaborated_type_nobody
218
219	%type<decl> enumerator_list enum_type enum_type_nobody
220	%type<en> enumerator_value_opt
221
222	%type<decl> exception_declaration external_definition external_definition_list external_definition_list_opt
223
224	%type<decl> field_declaration field_declaration_list field_declarator field_declaring_list
225	%type<en> field field_list field_name fraction_constants
226
227	%type<decl> external_function_definition function_definition function_array function_declarator function_no_ptr function_ptr
228
229	%type<decl> identifier_parameter_declarator identifier_parameter_ptr identifier_parameter_array identifier_parameter_function
230	%type<decl> identifier_list
231
232	%type<decl> cfa_abstract_array cfa_abstract_declarator_no_tuple cfa_abstract_declarator_tuple
233	%type<decl> cfa_abstract_function cfa_abstract_parameter_declaration cfa_abstract_parameter_list
234	%type<decl> cfa_abstract_ptr cfa_abstract_tuple
235
236	%type<decl> cfa_array_parameter_1st_dimension
237
238	%type<decl> cfa_trait_declaring_list cfa_declaration cfa_field_declaring_list
239	%type<decl> cfa_function_declaration cfa_function_return cfa_function_specifier
240
241	%type<decl> cfa_identifier_parameter_array cfa_identifier_parameter_declarator_no_tuple
242	%type<decl> cfa_identifier_parameter_declarator_tuple cfa_identifier_parameter_ptr
243
244	%type<decl> cfa_parameter_declaration cfa_parameter_list cfa_parameter_type_list cfa_parameter_type_list_opt
245
246	%type<decl> cfa_typedef_declaration cfa_variable_declaration cfa_variable_specifier
247
248	%type<decl> c_declaration
249	%type<decl> KR_function_declarator KR_function_no_ptr KR_function_ptr KR_function_array
250	%type<decl> KR_declaration_list KR_declaration_list_opt
251
252	%type<decl> parameter_declaration parameter_list parameter_type_list
253	%type<decl> parameter_type_list_opt
254
255	%type<decl> paren_identifier paren_type
256
257	%type<decl> storage_class storage_class_list
258
259	%type<decl> sue_declaration_specifier sue_declaration_specifier_nobody sue_type_specifier sue_type_specifier_nobody
260
261	%type<tclass> type_class
262	%type<decl> type_declarator type_declarator_name type_declaring_list
263
264	%type<decl> type_declaration_specifier type_type_specifier type_name typegen_name
265	%type<decl> typedef typedef_declaration typedef_expression
266
267	%type<decl> variable_type_redeclarator type_ptr type_array type_function
268
269	%type<decl> type_parameter_redeclarator type_parameter_ptr type_parameter_array type_parameter_function
270
271	%type<decl> type type_no_function
272	%type<decl> type_parameter type_parameter_list type_initializer_opt
273
274	%type<en> type_list
275
276	%type<decl> type_qualifier type_qualifier_name type_qualifier_list_opt type_qualifier_list
277	%type<decl> type_specifier type_specifier_nobody
278
279	%type<decl> variable_declarator variable_ptr variable_array variable_function
280	%type<decl> variable_abstract_declarator variable_abstract_ptr variable_abstract_array variable_abstract_function
281
282	%type<decl> attribute_list_opt attribute_list attribute_name_list attribute attribute_name
283
284	// initializers
285	%type<in> initializer initializer_list initializer_opt
286
287	// designators
288	%type<en> designator designator_list designation
289
290
291	// Handle single shift/reduce conflict for dangling else by shifting the ELSE token. For example, this string
292	// is ambiguous:
293	// .---------. matches IF '(' comma_expression ')' statement
294	// if ( C ) S1 else S2
295	// `-----------------' matches IF '(' comma_expression ')' statement ELSE statement */
296
297	%nonassoc THEN // rule precedence for IF '(' comma_expression ')' statement
298	%nonassoc ELSE // token precedence for start of else clause in IF statement
299
300	%start translation_unit // parse-tree root
301
302	%%
303	//*********************** Namespace Management ******************************
304
305	// The grammar in the ANSI C standard is not strictly context-free, since it relies upon the distinct terminal symbols
306	// "identifier" and "TYPEDEFname" that are lexically identical. While it is possible to write a purely context-free
307	// grammar, such a grammar would obscure the relationship between syntactic and semantic constructs. Hence, this
308	// grammar uses the ANSI style.
309	//
310	// Cforall compounds this problem by introducing type names local to the scope of a declaration (for instance, those
311	// introduced through "forall" qualifiers), and by introducing "type generators" -- parameterized types. This latter
312	// type name creates a third class of identifiers that must be distinguished by the scanner.
313	//
314	// Since the scanner cannot distinguish among the different classes of identifiers without some context information, it
315	// accesses a data structure (TypedefTable) to allow classification of an identifier that it has just read. Semantic
316	// actions during the parser update this data structure when the class of identifiers change.
317	//
318	// Because the Cforall language is block-scoped, there is the possibility that an identifier can change its class in a
319	// local scope; it must revert to its original class at the end of the block. Since type names can be local to a
320	// particular declaration, each declaration is itself a scope. This requires distinguishing between type names that are
321	// local to the current declaration scope and those that persist past the end of the declaration (i.e., names defined in
322	// "typedef" or "otype" declarations).
323	//
324	// The non-terminals "push" and "pop" derive the empty string; their only use is to denote the opening and closing of
325	// scopes. Every push must have a matching pop, although it is regrettable the matching pairs do not always occur
326	// within the same rule. These non-terminals may appear in more contexts than strictly necessary from a semantic point
327	// of view. Unfortunately, these extra rules are necessary to prevent parsing conflicts -- the parser may not have
328	// enough context and look-ahead information to decide whether a new scope is necessary, so the effect of these extra
329	// rules is to open a new scope unconditionally. As the grammar evolves, it may be neccesary to add or move around
330	// "push" and "pop" nonterminals to resolve conflicts of this sort.
331
332	push:
333	{ typedefTable.enterScope(); }
334	;
335
336	pop:
337	{ typedefTable.leaveScope(); }
338	;
339
340	//*********************** CONSTANTS ******************************
341
342	constant:
343	// ENUMERATIONconstant is not included here; it is treated as a variable with type "enumeration constant".
344	INTEGERconstant { $$ = new ExpressionNode( build_constantInteger( *$1 ) ); }
345	\| REALDECIMALconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); }
346	\| REALFRACTIONconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); }
347	\| FLOATINGconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); }
348	\| CHARACTERconstant { $$ = new ExpressionNode( build_constantChar( *$1 ) ); }
349	;
350
351	identifier:
352	IDENTIFIER
353	\| ATTR_IDENTIFIER // CFA
354	;
355
356	no_attr_identifier:
357	IDENTIFIER
358	;
359
360	zero_one: // CFA
361	ZERO
362	\| ONE
363	;
364
365	string_literal:
366	string_literal_list { $$ = build_constantStr( *$1 ); }
367	;
368
369	string_literal_list: // juxtaposed strings are concatenated
370	STRINGliteral { $$ = $1; } // conversion from tok to str
371	\| string_literal_list STRINGliteral
372	{
373	appendStr( $1, $2 ); // append 2nd juxtaposed string to 1st
374	delete $2; // allocated by lexer
375	$$ = $1; // conversion from tok to str
376	}
377	;
378
379	//*********************** EXPRESSIONS ******************************
380
381	primary_expression:
382	IDENTIFIER // typedef name cannot be used as a variable name
383	{ $$ = new ExpressionNode( build_varref( $1 ) ); }
384	\| zero_one
385	{ $$ = new ExpressionNode( build_constantZeroOne( *$1 ) ); }
386	\| tuple
387	\| '(' comma_expression ')'
388	{ $$ = $2; }
389	\| '(' compound_statement ')' // GCC, lambda expression
390	{ $$ = new ExpressionNode( build_valexpr( $2 ) ); }
391	\| primary_expression '{' argument_expression_list '}' // CFA, constructor call
392	{
393	Token fn;
394	fn.str = new std::string( "?{}" ); // location undefined - use location of '{'?
395	$$ = new ExpressionNode( new ConstructorExpr( build_func( new ExpressionNode( build_varref( fn ) ), (ExpressionNode *)( $1 )->set_last( $3 ) ) ) );
396	}
397	\| type_name '.' no_attr_identifier // CFA, nested type
398	{ $$ = nullptr; } // FIX ME
399	\| type_name '.' '[' push field_list pop ']' // CFA, nested type / tuple field selector
400	{ $$ = nullptr; } // FIX ME
401	;
402
403	postfix_expression:
404	primary_expression
405	\| postfix_expression '[' push assignment_expression pop ']'
406	// CFA, comma_expression disallowed in this context because it results in a common user error: subscripting a
407	// matrix with x[i,j] instead of x[i][j]. While this change is not backwards compatible, there seems to be
408	// little advantage to this feature and many disadvantages. It is possible to write x[(i,j)] in CFA, which is
409	// equivalent to the old x[i,j].
410	{ $$ = new ExpressionNode( build_binary_val( OperKinds::Index, $1, $4 ) ); }
411	\| postfix_expression '(' argument_expression_list ')'
412	{ $$ = new ExpressionNode( build_func( $1, $3 ) ); }
413	\| postfix_expression '.' no_attr_identifier
414	{ $$ = new ExpressionNode( build_fieldSel( $1, build_varref( $3 ) ) ); }
415	\| postfix_expression '.' '[' push field_list pop ']' // CFA, tuple field selector
416	{ $$ = new ExpressionNode( build_fieldSel( $1, build_tuple( $5 ) ) ); }
417	\| postfix_expression REALFRACTIONconstant // CFA, tuple index
418	{ $$ = new ExpressionNode( build_fieldSel( $1, build_field_name_REALFRACTIONconstant( *$2 ) ) ); }
419	\| postfix_expression ARROW no_attr_identifier
420	{
421	$$ = new ExpressionNode( build_pfieldSel( $1, $3 == "0" \|\| $3 == "1" ? build_constantInteger( *$3 ) : build_varref( $3 ) ) );
422	}
423	\| postfix_expression ARROW '[' push field_list pop ']' // CFA, tuple field selector
424	{ $$ = new ExpressionNode( build_pfieldSel( $1, build_tuple( $5 ) ) ); }
425	\| postfix_expression ARROW INTEGERconstant // CFA, tuple index
426	{ $$ = new ExpressionNode( build_pfieldSel( $1, build_constantInteger( *$3 ) ) ); }
427	\| postfix_expression ICR
428	{ $$ = new ExpressionNode( build_unary_ptr( OperKinds::IncrPost, $1 ) ); }
429	\| postfix_expression DECR
430	{ $$ = new ExpressionNode( build_unary_ptr( OperKinds::DecrPost, $1 ) ); }
431	\| '(' type_no_function ')' '{' initializer_list comma_opt '}' // C99, compound-literal
432	{ $$ = new ExpressionNode( build_compoundLiteral( $2, new InitializerNode( $5, true ) ) ); }
433	\| '^' primary_expression '{' argument_expression_list '}' // CFA
434	{
435	Token fn;
436	fn.str = new string( "^?{}" ); // location undefined
437	$$ = new ExpressionNode( build_func( new ExpressionNode( build_varref( fn ) ), (ExpressionNode *)( $2 )->set_last( $4 ) ) );
438	}
439	;
440
441	argument_expression_list:
442	argument_expression
443	\| argument_expression_list ',' argument_expression
444	{ $$ = (ExpressionNode *)( $1->set_last( $3 )); }
445	;
446
447	argument_expression:
448	// empty
449	{ $$ = nullptr; }
450	// \| '@' // use default argument
451	// { $$ = new ExpressionNode( build_constantInteger( *new string( "2" ) ) ); }
452	\| assignment_expression
453	;
454
455	field_list: // CFA, tuple field selector
456	field
457	\| field_list ',' field { $$ = (ExpressionNode *)$1->set_last( $3 ); }
458	;
459
460	field: // CFA, tuple field selector
461	field_name
462	\| REALDECIMALconstant field
463	{ $$ = new ExpressionNode( build_fieldSel( new ExpressionNode( build_field_name_REALDECIMALconstant( *$1 ) ), maybeMoveBuild<Expression>( $2 ) ) ); }
464	\| REALDECIMALconstant '[' push field_list pop ']'
465	{ $$ = new ExpressionNode( build_fieldSel( new ExpressionNode( build_field_name_REALDECIMALconstant( *$1 ) ), build_tuple( $4 ) ) ); }
466	\| field_name '.' field
467	{ $$ = new ExpressionNode( build_fieldSel( $1, maybeMoveBuild<Expression>( $3 ) ) ); }
468	\| field_name '.' '[' push field_list pop ']'
469	{ $$ = new ExpressionNode( build_fieldSel( $1, build_tuple( $5 ) ) ); }
470	\| field_name ARROW field
471	{ $$ = new ExpressionNode( build_pfieldSel( $1, maybeMoveBuild<Expression>( $3 ) ) ); }
472	\| field_name ARROW '[' push field_list pop ']'
473	{ $$ = new ExpressionNode( build_pfieldSel( $1, build_tuple( $5 ) ) ); }
474	;
475
476	field_name:
477	INTEGERconstant fraction_constants
478	{ $$ = new ExpressionNode( build_field_name_fraction_constants( build_constantInteger( *$1 ), $2 ) ); }
479	\| FLOATINGconstant fraction_constants
480	{ $$ = new ExpressionNode( build_field_name_fraction_constants( build_field_name_FLOATINGconstant( *$1 ), $2 ) ); }
481	\| no_attr_identifier fraction_constants
482	{
483	$$ = new ExpressionNode( build_field_name_fraction_constants( build_varref( $1 ), $2 ) );
484	}
485	\| zero_one fraction_constants
486	{
487	$$ = new ExpressionNode( build_field_name_fraction_constants( build_constantZeroOne( *$1 ), $2 ) );
488	}
489	;
490
491	fraction_constants:
492	// empty
493	{ $$ = nullptr; }
494	\| fraction_constants REALFRACTIONconstant
495	{
496	Expression * constant = build_field_name_REALFRACTIONconstant( *$2 );
497	$$ = $1 != nullptr ? new ExpressionNode( build_fieldSel( $1, constant ) ) : new ExpressionNode( constant );
498	}
499	;
500
501	unary_expression:
502	postfix_expression
503	// first location where constant/string can have operator applied: sizeof 3/sizeof "abc" still requires
504	// semantics checks, e.g., ++3, 3--, *3, &&3
505	\| constant
506	{ $$ = $1; }
507	\| string_literal
508	{ $$ = new ExpressionNode( $1 ); }
509	\| EXTENSION cast_expression // GCC
510	{ $$ = $2->set_extension( true ); }
511	// '*' ('&') is separated from unary_operator because of shift/reduce conflict in:
512	// { * X; } // dereference X
513	// { * int X; } // CFA declaration of pointer to int
514	\| ptrref_operator cast_expression // CFA
515	{
516	switch ( $1 ) {
517	case OperKinds::AddressOf:
518	$$ = new ExpressionNode( build_addressOf( $2 ) );
519	break;
520	case OperKinds::PointTo:
521	$$ = new ExpressionNode( build_unary_val( $1, $2 ) );
522	break;
523	default:
524	assert( false );
525	}
526	}
527	\| unary_operator cast_expression
528	{ $$ = new ExpressionNode( build_unary_val( $1, $2 ) ); }
529	\| ICR unary_expression
530	{ $$ = new ExpressionNode( build_unary_ptr( OperKinds::Incr, $2 ) ); }
531	\| DECR unary_expression
532	{ $$ = new ExpressionNode( build_unary_ptr( OperKinds::Decr, $2 ) ); }
533	\| SIZEOF unary_expression
534	{ $$ = new ExpressionNode( build_sizeOfexpr( $2 ) ); }
535	\| SIZEOF '(' type_no_function ')'
536	{ $$ = new ExpressionNode( build_sizeOftype( $3 ) ); }
537	\| ALIGNOF unary_expression // GCC, variable alignment
538	{ $$ = new ExpressionNode( build_alignOfexpr( $2 ) ); }
539	\| ALIGNOF '(' type_no_function ')' // GCC, type alignment
540	{ $$ = new ExpressionNode( build_alignOftype( $3 ) ); }
541	\| OFFSETOF '(' type_no_function ',' no_attr_identifier ')'
542	{ $$ = new ExpressionNode( build_offsetOf( $3, build_varref( $5 ) ) ); }
543	\| ATTR_IDENTIFIER
544	{ $$ = new ExpressionNode( build_attrexpr( build_varref( $1 ), nullptr ) ); }
545	\| ATTR_IDENTIFIER '(' argument_expression ')'
546	{ $$ = new ExpressionNode( build_attrexpr( build_varref( $1 ), $3 ) ); }
547	\| ATTR_IDENTIFIER '(' type ')'
548	{ $$ = new ExpressionNode( build_attrtype( build_varref( $1 ), $3 ) ); }
549	// \| ANDAND IDENTIFIER // GCC, address of label
550	// { $$ = new ExpressionNode( new OperatorNode( OperKinds::LabelAddress ), new ExpressionNode( build_varref( $2 ) ); }
551	;
552
553	ptrref_operator:
554	'*' { $$ = OperKinds::PointTo; }
555	\| '&' { $$ = OperKinds::AddressOf; }
556	// GCC, address of label must be handled by semantic check for ref,ref,label
557	// \| ANDAND { $$ = OperKinds::And; }
558	;
559
560	unary_operator:
561	'+' { $$ = OperKinds::UnPlus; }
562	\| '-' { $$ = OperKinds::UnMinus; }
563	\| '!' { $$ = OperKinds::Neg; }
564	\| '~' { $$ = OperKinds::BitNeg; }
565	;
566
567	cast_expression:
568	unary_expression
569	\| '(' type_no_function ')' cast_expression
570	{ $$ = new ExpressionNode( build_cast( $2, $4 ) ); }
571	// \| '(' type_no_function ')' tuple
572	// { $$ = new ExpressionNode( build_cast( $2, $4 ) ); }
573	;
574
575	multiplicative_expression:
576	cast_expression
577	\| multiplicative_expression '*' cast_expression
578	{ $$ = new ExpressionNode( build_binary_val( OperKinds::Mul, $1, $3 ) ); }
579	\| multiplicative_expression '/' cast_expression
580	{ $$ = new ExpressionNode( build_binary_val( OperKinds::Div, $1, $3 ) ); }
581	\| multiplicative_expression '%' cast_expression
582	{ $$ = new ExpressionNode( build_binary_val( OperKinds::Mod, $1, $3 ) ); }
583	;
584
585	additive_expression:
586	multiplicative_expression
587	\| additive_expression '+' multiplicative_expression
588	{ $$ = new ExpressionNode( build_binary_val( OperKinds::Plus, $1, $3 ) ); }
589	\| additive_expression '-' multiplicative_expression
590	{ $$ = new ExpressionNode( build_binary_val( OperKinds::Minus, $1, $3 ) ); }
591	;
592
593	shift_expression:
594	additive_expression
595	\| shift_expression LS additive_expression
596	{ $$ = new ExpressionNode( build_binary_val( OperKinds::LShift, $1, $3 ) ); }
597	\| shift_expression RS additive_expression
598	{ $$ = new ExpressionNode( build_binary_val( OperKinds::RShift, $1, $3 ) ); }
599	;
600
601	relational_expression:
602	shift_expression
603	\| relational_expression '<' shift_expression
604	{ $$ = new ExpressionNode( build_binary_val( OperKinds::LThan, $1, $3 ) ); }
605	\| relational_expression '>' shift_expression
606	{ $$ = new ExpressionNode( build_binary_val( OperKinds::GThan, $1, $3 ) ); }
607	\| relational_expression LE shift_expression
608	{ $$ = new ExpressionNode( build_binary_val( OperKinds::LEThan, $1, $3 ) ); }
609	\| relational_expression GE shift_expression
610	{ $$ = new ExpressionNode( build_binary_val( OperKinds::GEThan, $1, $3 ) ); }
611	;
612
613	equality_expression:
614	relational_expression
615	\| equality_expression EQ relational_expression
616	{ $$ = new ExpressionNode( build_binary_val( OperKinds::Eq, $1, $3 ) ); }
617	\| equality_expression NE relational_expression
618	{ $$ = new ExpressionNode( build_binary_val( OperKinds::Neq, $1, $3 ) ); }
619	;
620
621	AND_expression:
622	equality_expression
623	\| AND_expression '&' equality_expression
624	{ $$ = new ExpressionNode( build_binary_val( OperKinds::BitAnd, $1, $3 ) ); }
625	;
626
627	exclusive_OR_expression:
628	AND_expression
629	\| exclusive_OR_expression '^' AND_expression
630	{ $$ = new ExpressionNode( build_binary_val( OperKinds::Xor, $1, $3 ) ); }
631	;
632
633	inclusive_OR_expression:
634	exclusive_OR_expression
635	\| inclusive_OR_expression '\|' exclusive_OR_expression
636	{ $$ = new ExpressionNode( build_binary_val( OperKinds::BitOr, $1, $3 ) ); }
637	;
638
639	logical_AND_expression:
640	inclusive_OR_expression
641	\| logical_AND_expression ANDAND inclusive_OR_expression
642	{ $$ = new ExpressionNode( build_and_or( $1, $3, true ) ); }
643	;
644
645	logical_OR_expression:
646	logical_AND_expression
647	\| logical_OR_expression OROR logical_AND_expression
648	{ $$ = new ExpressionNode( build_and_or( $1, $3, false ) ); }
649	;
650
651	conditional_expression:
652	logical_OR_expression
653	\| logical_OR_expression '?' comma_expression ':' conditional_expression
654	{ $$ = new ExpressionNode( build_cond( $1, $3, $5 ) ); }
655	// FIX ME: this hack computes $1 twice
656	\| logical_OR_expression '?' /* empty */ ':' conditional_expression // GCC, omitted first operand
657	{ $$ = new ExpressionNode( build_cond( $1, $1, $4 ) ); }
658	;
659
660	constant_expression:
661	conditional_expression
662	;
663
664	assignment_expression:
665	// CFA, assignment is separated from assignment_operator to ensure no assignment operations for tuples
666	conditional_expression
667	\| unary_expression assignment_operator assignment_expression
668	{ $$ = new ExpressionNode( build_binary_val( $2, $1, $3 ) ); }
669	;
670
671	assignment_expression_opt:
672	// empty
673	{ $$ = nullptr; }
674	\| assignment_expression
675	;
676
677	assignment_operator:
678	'=' { $$ = OperKinds::Assign; }
679	\| ATassign { $$ = OperKinds::AtAssn; }
680	\| MULTassign { $$ = OperKinds::MulAssn; }
681	\| DIVassign { $$ = OperKinds::DivAssn; }
682	\| MODassign { $$ = OperKinds::ModAssn; }
683	\| PLUSassign { $$ = OperKinds::PlusAssn; }
684	\| MINUSassign { $$ = OperKinds::MinusAssn; }
685	\| LSassign { $$ = OperKinds::LSAssn; }
686	\| RSassign { $$ = OperKinds::RSAssn; }
687	\| ANDassign { $$ = OperKinds::AndAssn; }
688	\| ERassign { $$ = OperKinds::ERAssn; }
689	\| ORassign { $$ = OperKinds::OrAssn; }
690	;
691
692	tuple: // CFA, tuple
693	// CFA, one assignment_expression is factored out of comma_expression to eliminate a shift/reduce conflict with
694	// comma_expression in cfa_identifier_parameter_array and cfa_abstract_array
695	// '[' ']'
696	// { $$ = new ExpressionNode( build_tuple() ); }
697	// '[' push assignment_expression pop ']'
698	// { $$ = new ExpressionNode( build_tuple( $3 ) ); }
699	'[' push ',' tuple_expression_list pop ']'
700	{ $$ = new ExpressionNode( build_tuple( (ExpressionNode *)(new ExpressionNode( nullptr ) )->set_last( $4 ) ) ); }
701	\| '[' push assignment_expression ',' tuple_expression_list pop ']'
702	{ $$ = new ExpressionNode( build_tuple( (ExpressionNode *)$3->set_last( $5 ) ) ); }
703	;
704
705	tuple_expression_list:
706	assignment_expression_opt
707	\| tuple_expression_list ',' assignment_expression_opt
708	{ $$ = (ExpressionNode *)$1->set_last( $3 ); }
709	;
710
711	comma_expression:
712	assignment_expression
713	\| comma_expression ',' assignment_expression
714	{ $$ = new ExpressionNode( build_comma( $1, $3 ) ); }
715	;
716
717	comma_expression_opt:
718	// empty
719	{ $$ = nullptr; }
720	\| comma_expression
721	;
722
723	//************************* STATEMENTS *****************************
724
725	statement:
726	labeled_statement
727	\| compound_statement
728	\| expression_statement { $$ = $1; }
729	\| selection_statement
730	\| iteration_statement
731	\| jump_statement
732	\| with_statement
733	\| exception_statement
734	\| asm_statement
735
736	labeled_statement:
737	// labels cannot be identifiers 0 or 1 or ATTR_IDENTIFIER
738	identifier_or_type_name ':' attribute_list_opt statement
739	{
740	$$ = $4->add_label( $1, $3 );
741	}
742	;
743
744	compound_statement:
745	'{' '}'
746	{ $$ = new StatementNode( build_compound( (StatementNode *)0 ) ); }
747	\| '{'
748	// Two scopes are necessary because the block itself has a scope, but every declaration within the block also
749	// requires its own scope.
750	push push
751	local_label_declaration_opt // GCC, local labels
752	block_item_list // C99, intermix declarations and statements
753	pop '}'
754	{ $$ = new StatementNode( build_compound( $5 ) ); }
755	;
756
757	block_item_list: // C99
758	block_item
759	\| block_item_list push block_item
760	{ if ( $1 != 0 ) { $1->set_last( $3 ); $$ = $1; } }
761	;
762
763	block_item:
764	declaration // CFA, new & old style declarations
765	{ $$ = new StatementNode( $1 ); }
766	\| EXTENSION declaration // GCC
767	{
768	distExt( $2 );
769	$$ = new StatementNode( $2 );
770	}
771	\| function_definition
772	{ $$ = new StatementNode( $1 ); }
773	\| EXTENSION function_definition // GCC
774	{
775	distExt( $2 );
776	$$ = new StatementNode( $2 );
777	}
778	\| statement pop
779	;
780
781	statement_list:
782	statement
783	\| statement_list statement
784	{ if ( $1 != 0 ) { $1->set_last( $2 ); $$ = $1; } }
785	;
786
787	expression_statement:
788	comma_expression_opt ';'
789	{ $$ = new StatementNode( build_expr( $1 ) ); }
790	;
791
792	selection_statement:
793	IF '(' comma_expression ')' statement %prec THEN
794	// explicitly deal with the shift/reduce conflict on if/else
795	{ $$ = new StatementNode( build_if( $3, $5, nullptr ) ); }
796	\| IF '(' comma_expression ')' statement ELSE statement
797	{ $$ = new StatementNode( build_if( $3, $5, $7 ) ); }
798	\| SWITCH '(' comma_expression ')' case_clause // CFA
799	{ $$ = new StatementNode( build_switch( $3, $5 ) ); }
800	\| SWITCH '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt '}' // CFA
801	{
802	StatementNode *sw = new StatementNode( build_switch( $3, $8 ) );
803	// The semantics of the declaration list is changed to include associated initialization, which is performed
804	// before the transfer to the appropriate case clause by hoisting the declarations into a compound
805	// statement around the switch. Statements after the initial declaration list can never be executed, and
806	// therefore, are removed from the grammar even though C allows it. The change also applies to choose
807	// statement.
808	$$ = $7 ? new StatementNode( build_compound( (StatementNode *)((new StatementNode( $7 ))->set_last( sw )) ) ) : sw;
809	}
810	\| CHOOSE '(' comma_expression ')' case_clause // CFA
811	{ $$ = new StatementNode( build_switch( $3, $5 ) ); }
812	\| CHOOSE '(' comma_expression ')' '{' push declaration_list_opt choose_clause_list_opt '}' // CFA
813	{
814	StatementNode *sw = new StatementNode( build_switch( $3, $8 ) );
815	$$ = $7 ? new StatementNode( build_compound( (StatementNode *)((new StatementNode( $7 ))->set_last( sw )) ) ) : sw;
816	}
817	;
818
819	// CASE and DEFAULT clauses are only allowed in the SWITCH statement, precluding Duff's device. In addition, a case
820	// clause allows a list of values and subranges.
821
822	case_value: // CFA
823	constant_expression { $$ = $1; }
824	\| constant_expression ELLIPSIS constant_expression // GCC, subrange
825	{ $$ = new ExpressionNode( build_range( $1, $3 ) ); }
826	\| subrange // CFA, subrange
827	;
828
829	case_value_list: // CFA
830	case_value { $$ = new StatementNode( build_case( $1 ) ); }
831	// convert case list, e.g., "case 1, 3, 5:" into "case 1: case 3: case 5"
832	\| case_value_list ',' case_value { $$ = (StatementNode *)($1->set_last( new StatementNode( build_case( $3 ) ) ) ); }
833	;
834
835	case_label: // CFA
836	CASE case_value_list ':' { $$ = $2; }
837	\| DEFAULT ':' { $$ = new StatementNode( build_default() ); }
838	// A semantic check is required to ensure only one default clause per switch/choose statement.
839	;
840
841	case_label_list: // CFA
842	case_label
843	\| case_label_list case_label { $$ = (StatementNode *)( $1->set_last( $2 )); }
844	;
845
846	case_clause: // CFA
847	case_label_list statement { $$ = $1->append_last_case( new StatementNode( build_compound( $2 ) ) ); }
848	;
849
850	switch_clause_list_opt: // CFA
851	// empty
852	{ $$ = nullptr; }
853	\| switch_clause_list
854	;
855
856	switch_clause_list: // CFA
857	case_label_list statement_list
858	{ $$ = $1->append_last_case( new StatementNode( build_compound( $2 ) ) ); }
859	\| switch_clause_list case_label_list statement_list
860	{ $$ = (StatementNode *)( $1->set_last( $2->append_last_case( new StatementNode( build_compound( $3 ) ) ) ) ); }
861	;
862
863	choose_clause_list_opt: // CFA
864	// empty
865	{ $$ = nullptr; }
866	\| choose_clause_list
867	;
868
869	choose_clause_list: // CFA
870	case_label_list fall_through
871	{ $$ = $1->append_last_case( $2 ); }
872	\| case_label_list statement_list fall_through_opt
873	{ $$ = $1->append_last_case( new StatementNode( build_compound( (StatementNode *)$2->set_last( $3 ) ) ) ); }
874	\| choose_clause_list case_label_list fall_through
875	{ $$ = (StatementNode *)( $1->set_last( $2->append_last_case( $3 ))); }
876	\| choose_clause_list case_label_list statement_list fall_through_opt
877	{ $$ = (StatementNode )( $1->set_last( $2->append_last_case( new StatementNode( build_compound( (StatementNode )$3->set_last( $4 ) ) ) ) ) ); }
878	;
879
880	fall_through_opt: // CFA
881	// empty
882	{ $$ = new StatementNode( build_branch( BranchStmt::Break ) ); } // insert implicit break
883	\| fall_through
884	;
885
886	fall_through: // CFA
887	FALLTHRU
888	{ $$ = nullptr; }
889	\| FALLTHRU ';'
890	{ $$ = nullptr; }
891	;
892
893	iteration_statement:
894	WHILE '(' comma_expression ')' statement
895	{ $$ = new StatementNode( build_while( $3, $5 ) ); }
896	\| DO statement WHILE '(' comma_expression ')' ';'
897	{ $$ = new StatementNode( build_while( $5, $2, true ) ); }
898	\| FOR '(' push for_control_expression ')' statement
899	{ $$ = new StatementNode( build_for( $4, $6 ) ); }
900	;
901
902	for_control_expression:
903	comma_expression_opt pop ';' comma_expression_opt ';' comma_expression_opt
904	{ $$ = new ForCtl( $1, $4, $6 ); }
905	\| declaration comma_expression_opt ';' comma_expression_opt // C99
906	{ $$ = new ForCtl( $1, $2, $4 ); }
907	;
908
909	jump_statement:
910	GOTO identifier_or_type_name ';'
911	{ $$ = new StatementNode( build_branch( $2, BranchStmt::Goto ) ); }
912	\| GOTO '*' comma_expression ';' // GCC, computed goto
913	// The syntax for the GCC computed goto violates normal expression precedence, e.g., goto i+3; => goto (i+3);
914	// whereas normal operator precedence yields goto (*i)+3;
915	{ $$ = new StatementNode( build_computedgoto( $3 ) ); }
916	\| CONTINUE ';'
917	// A semantic check is required to ensure this statement appears only in the body of an iteration statement.
918	{ $$ = new StatementNode( build_branch( BranchStmt::Continue ) ); }
919	\| CONTINUE identifier_or_type_name ';' // CFA, multi-level continue
920	// A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
921	// the target of the transfer appears only at the start of an iteration statement.
922	{ $$ = new StatementNode( build_branch( $2, BranchStmt::Continue ) ); }
923	\| BREAK ';'
924	// A semantic check is required to ensure this statement appears only in the body of an iteration statement.
925	{ $$ = new StatementNode( build_branch( BranchStmt::Break ) ); }
926	\| BREAK identifier_or_type_name ';' // CFA, multi-level exit
927	// A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
928	// the target of the transfer appears only at the start of an iteration statement.
929	{ $$ = new StatementNode( build_branch( $2, BranchStmt::Break ) ); }
930	\| RETURN comma_expression_opt ';'
931	{ $$ = new StatementNode( build_return( $2 ) ); }
932	\| THROW assignment_expression_opt ';' // handles rethrow
933	{ $$ = new StatementNode( build_throw( $2 ) ); }
934	\| THROWRESUME assignment_expression_opt ';' // handles reresume
935	{ $$ = new StatementNode( build_resume( $2 ) ); }
936	\| THROWRESUME assignment_expression_opt AT assignment_expression ';' // handles reresume
937	{ $$ = new StatementNode( build_resume_at( $2, $4 ) ); }
938	;
939
940	with_statement:
941	WITH identifier_list compound_statement
942	{ $$ = (StatementNode *)0; } // FIX ME
943	;
944
945	exception_statement:
946	TRY compound_statement handler_clause
947	{ $$ = new StatementNode( build_try( $2, $3, 0 ) ); }
948	\| TRY compound_statement finally_clause
949	{ $$ = new StatementNode( build_try( $2, 0, $3 ) ); }
950	\| TRY compound_statement handler_clause finally_clause
951	{ $$ = new StatementNode( build_try( $2, $3, $4 ) ); }
952	;
953
954	//handler_list:
955	// handler_clause
956	// // ISO/IEC 9899:1999 Section 15.3(6 ) If present, a "..." handler shall be the last handler for its try block.
957	// \| CATCH '(' ELLIPSIS ')' compound_statement
958	// { $$ = new StatementNode( build_catch( 0, $5, true ) ); }
959	// \| handler_clause CATCH '(' ELLIPSIS ')' compound_statement
960	// { $$ = (StatementNode *)$1->set_last( new StatementNode( build_catch( 0, $6, true ) ) ); }
961	// \| CATCHRESUME '(' ELLIPSIS ')' compound_statement
962	// { $$ = new StatementNode( build_catch( 0, $5, true ) ); }
963	// \| handler_clause CATCHRESUME '(' ELLIPSIS ')' compound_statement
964	// { $$ = (StatementNode *)$1->set_last( new StatementNode( build_catch( 0, $6, true ) ) ); }
965	// ;
966
967	handler_clause:
968	// TEMPORARY, TEST EXCEPTIONS
969	handler_key '(' push push INTEGERconstant pop ')' compound_statement pop
970	{ $$ = new StatementNode( build_catch( $1, nullptr, new ExpressionNode( build_constantInteger( *$5 ) ), $8 ) ); }
971	\| handler_clause handler_key '(' push push INTEGERconstant pop ')' compound_statement pop
972	{ $$ = (StatementNode )$1->set_last( new StatementNode( build_catch( $2, nullptr, new ExpressionNode( build_constantInteger( $6 ) ), $9 ) ) ); }
973
974	\| handler_key '(' push push exception_declaration pop ')' compound_statement pop
975	{ $$ = new StatementNode( build_catch( $1, $5, nullptr, $8 ) ); }
976	\| handler_clause handler_key '(' push push exception_declaration pop ')' compound_statement pop
977	{ $$ = (StatementNode *)$1->set_last( new StatementNode( build_catch( $2, $6, nullptr, $9 ) ) ); }
978	;
979
980	handler_key:
981	CATCH
982	{ $$ = CatchStmt::Terminate; }
983	\| CATCHRESUME
984	{ $$ = CatchStmt::Resume; }
985	;
986
987	finally_clause:
988	FINALLY compound_statement
989	{
990	$$ = new StatementNode( build_finally( $2 ) );
991	}
992	;
993
994	exception_declaration:
995	// No SUE declaration in parameter list.
996	type_specifier_nobody
997	\| type_specifier_nobody declarator
998	{
999	typedefTable.addToEnclosingScope( TypedefTable::ID );
1000	$$ = $2->addType( $1 );
1001	}
1002	\| type_specifier_nobody variable_abstract_declarator
1003	{ $$ = $2->addType( $1 ); }
1004	\| cfa_abstract_declarator_tuple no_attr_identifier // CFA
1005	{
1006	typedefTable.addToEnclosingScope( TypedefTable::ID );
1007	$$ = $1->addName( $2 );
1008	}
1009	\| cfa_abstract_declarator_tuple // CFA
1010	;
1011
1012	asm_statement:
1013	ASM asm_volatile_opt '(' string_literal ')' ';'
1014	{ $$ = new StatementNode( build_asmstmt( $2, $4, 0 ) ); }
1015	\| ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ')' ';' // remaining GCC
1016	{ $$ = new StatementNode( build_asmstmt( $2, $4, $6 ) ); }
1017	\| ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ')' ';'
1018	{ $$ = new StatementNode( build_asmstmt( $2, $4, $6, $8 ) ); }
1019	\| ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ':' asm_clobbers_list_opt ')' ';'
1020	{ $$ = new StatementNode( build_asmstmt( $2, $4, $6, $8, $10 ) ); }
1021	\| ASM asm_volatile_opt GOTO '(' string_literal ':' ':' asm_operands_opt ':' asm_clobbers_list_opt ':' label_list ')' ';'
1022	{ $$ = new StatementNode( build_asmstmt( $2, $5, 0, $8, $10, $12 ) ); }
1023	;
1024
1025	asm_volatile_opt: // GCC
1026	// empty
1027	{ $$ = false; }
1028	\| VOLATILE
1029	{ $$ = true; }
1030	;
1031
1032	asm_operands_opt: // GCC
1033	// empty
1034	{ $$ = nullptr; } // use default argument
1035	\| asm_operands_list
1036	;
1037
1038	asm_operands_list: // GCC
1039	asm_operand
1040	\| asm_operands_list ',' asm_operand
1041	{ $$ = (ExpressionNode *)$1->set_last( $3 ); }
1042	;
1043
1044	asm_operand: // GCC
1045	string_literal '(' constant_expression ')'
1046	{ $$ = new ExpressionNode( build_asmexpr( 0, $1, $3 ) ); }
1047	\| '[' constant_expression ']' string_literal '(' constant_expression ')'
1048	{ $$ = new ExpressionNode( build_asmexpr( $2, $4, $6 ) ); }
1049	;
1050
1051	asm_clobbers_list_opt: // GCC
1052	// empty
1053	{ $$ = nullptr; } // use default argument
1054	\| string_literal
1055	{ $$ = new ExpressionNode( $1 ); }
1056	\| asm_clobbers_list_opt ',' string_literal
1057	// set_last return ParseNode *
1058	{ $$ = (ExpressionNode *)$1->set_last( new ExpressionNode( $3 ) ); }
1059	;
1060
1061	label_list:
1062	no_attr_identifier
1063	{
1064	$$ = new LabelNode(); $$->labels.push_back( *$1 );
1065	delete $1; // allocated by lexer
1066	}
1067	\| label_list ',' no_attr_identifier
1068	{
1069	$$ = $1; $1->labels.push_back( *$3 );
1070	delete $3; // allocated by lexer
1071	}
1072	;
1073
1074	//***************************** DECLARATIONS *******************************
1075
1076	declaration_list_opt: // used at beginning of switch statement
1077	pop
1078	{ $$ = nullptr; }
1079	\| declaration_list
1080	;
1081
1082	declaration_list:
1083	declaration
1084	\| declaration_list push declaration
1085	{ $$ = $1->appendList( $3 ); }
1086	;
1087
1088	KR_declaration_list_opt: // used to declare parameter types in K&R style functions
1089	pop
1090	{ $$ = nullptr; }
1091	\| KR_declaration_list
1092	;
1093
1094	KR_declaration_list:
1095	c_declaration
1096	\| KR_declaration_list push c_declaration
1097	{ $$ = $1->appendList( $3 ); }
1098	;
1099
1100	local_label_declaration_opt: // GCC, local label
1101	// empty
1102	\| local_label_declaration_list
1103	;
1104
1105	local_label_declaration_list: // GCC, local label
1106	LABEL local_label_list ';'
1107	\| local_label_declaration_list LABEL local_label_list ';'
1108	;
1109
1110	local_label_list: // GCC, local label
1111	no_attr_identifier_or_type_name {}
1112	\| local_label_list ',' no_attr_identifier_or_type_name {}
1113	;
1114
1115	declaration: // CFA, new & old style declarations
1116	cfa_declaration
1117	\| c_declaration
1118	;
1119
1120	// C declaration syntax is notoriously confusing and error prone. Cforall provides its own type, variable and function
1121	// declarations. CFA declarations use the same declaration tokens as in C; however, CFA places declaration modifiers to
1122	// the left of the base type, while C declarations place modifiers to the right of the base type. CFA declaration
1123	// modifiers are interpreted from left to right and the entire type specification is distributed across all variables in
1124	// the declaration list (as in Pascal). ANSI C and the new CFA declarations may appear together in the same program
1125	// block, but cannot be mixed within a specific declaration.
1126	//
1127	// CFA C
1128	// [10] int x; int x[10]; // array of 10 integers
1129	// [10] * char y; char *y[10]; // array of 10 pointers to char
1130
1131	cfa_declaration: // CFA
1132	cfa_variable_declaration pop ';'
1133	\| cfa_typedef_declaration pop ';'
1134	\| cfa_function_declaration pop ';'
1135	\| type_declaring_list pop ';'
1136	\| trait_specifier pop ';'
1137	;
1138
1139	cfa_variable_declaration: // CFA
1140	cfa_variable_specifier initializer_opt
1141	{
1142	typedefTable.addToEnclosingScope( TypedefTable::ID );
1143	$$ = $1->addInitializer( $2 );
1144	}
1145	\| declaration_qualifier_list cfa_variable_specifier initializer_opt
1146	// declaration_qualifier_list also includes type_qualifier_list, so a semantic check is necessary to preclude
1147	// them as a type_qualifier cannot appear in that context.
1148	{
1149	typedefTable.addToEnclosingScope( TypedefTable::ID );
1150	$$ = $2->addQualifiers( $1 )->addInitializer( $3 );;
1151	}
1152	\| cfa_variable_declaration pop ',' push identifier_or_type_name initializer_opt
1153	{
1154	typedefTable.addToEnclosingScope( *$5, TypedefTable::ID );
1155	$$ = $1->appendList( $1->cloneType( $5 )->addInitializer( $6 ) );
1156	}
1157	;
1158
1159	cfa_variable_specifier: // CFA
1160	// A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
1161	// storage-class
1162	cfa_abstract_declarator_no_tuple identifier_or_type_name asm_name_opt
1163	{
1164	typedefTable.setNextIdentifier( *$2 );
1165	$$ = $1->addName( $2 )->addAsmName( $3 );
1166	}
1167	\| cfa_abstract_tuple identifier_or_type_name asm_name_opt
1168	{
1169	typedefTable.setNextIdentifier( *$2 );
1170	$$ = $1->addName( $2 )->addAsmName( $3 );
1171	}
1172	\| type_qualifier_list cfa_abstract_tuple identifier_or_type_name asm_name_opt
1173	{
1174	typedefTable.setNextIdentifier( *$3 );
1175	$$ = $2->addQualifiers( $1 )->addName( $3 )->addAsmName( $4 );
1176	}
1177	;
1178
1179	cfa_function_declaration: // CFA
1180	cfa_function_specifier
1181	{
1182	typedefTable.addToEnclosingScope( TypedefTable::ID );
1183	$$ = $1;
1184	}
1185	\| type_qualifier_list cfa_function_specifier
1186	{
1187	typedefTable.addToEnclosingScope( TypedefTable::ID );
1188	$$ = $2->addQualifiers( $1 );
1189	}
1190	\| declaration_qualifier_list cfa_function_specifier
1191	{
1192	typedefTable.addToEnclosingScope( TypedefTable::ID );
1193	$$ = $2->addQualifiers( $1 );
1194	}
1195	\| declaration_qualifier_list type_qualifier_list cfa_function_specifier
1196	{
1197	typedefTable.addToEnclosingScope( TypedefTable::ID );
1198	$$ = $3->addQualifiers( $1 )->addQualifiers( $2 );
1199	}
1200	\| cfa_function_declaration pop ',' push identifier_or_type_name
1201	{
1202	typedefTable.addToEnclosingScope( *$5, TypedefTable::ID );
1203	$$ = $1->appendList( $1->cloneType( $5 ) );
1204	}
1205	;
1206
1207	cfa_function_specifier: // CFA
1208	// '[' ']' identifier_or_type_name '(' push cfa_parameter_type_list_opt pop ')' // S/R conflict
1209	// {
1210	// $$ = DeclarationNode::newFunction( $3, DeclarationNode::newTuple( 0 ), $6, 0, true );
1211	// }
1212	// '[' ']' identifier '(' push cfa_parameter_type_list_opt pop ')'
1213	// {
1214	// typedefTable.setNextIdentifier( *$5 );
1215	// $$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, 0, true );
1216	// }
1217	// \| '[' ']' TYPEDEFname '(' push cfa_parameter_type_list_opt pop ')'
1218	// {
1219	// typedefTable.setNextIdentifier( *$5 );
1220	// $$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, 0, true );
1221	// }
1222	// \| '[' ']' typegen_name
1223	// identifier_or_type_name must be broken apart because of the sequence:
1224	//
1225	// '[' ']' identifier_or_type_name '(' cfa_parameter_type_list_opt ')'
1226	// '[' ']' type_specifier
1227	//
1228	// type_specifier can resolve to just TYPEDEFname (e.g., typedef int T; int f( T );). Therefore this must be
1229	// flattened to allow lookahead to the '(' without having to reduce identifier_or_type_name.
1230	cfa_abstract_tuple identifier_or_type_name '(' push cfa_parameter_type_list_opt pop ')'
1231	// To obtain LR(1 ), this rule must be factored out from function return type (see cfa_abstract_declarator).
1232	{
1233	$$ = DeclarationNode::newFunction( $2, $1, $5, 0, true );
1234	}
1235	\| cfa_function_return identifier_or_type_name '(' push cfa_parameter_type_list_opt pop ')'
1236	{
1237	$$ = DeclarationNode::newFunction( $2, $1, $5, 0, true );
1238	}
1239	;
1240
1241	cfa_function_return: // CFA
1242	'[' push cfa_parameter_list pop ']'
1243	{ $$ = DeclarationNode::newTuple( $3 ); }
1244	\| '[' push cfa_parameter_list pop ',' push cfa_abstract_parameter_list pop ']'
1245	// To obtain LR(1 ), the last cfa_abstract_parameter_list is added into this flattened rule to lookahead to the
1246	// ']'.
1247	{ $$ = DeclarationNode::newTuple( $3->appendList( $7 ) ); }
1248	;
1249
1250	cfa_typedef_declaration: // CFA
1251	TYPEDEF cfa_variable_specifier
1252	{
1253	typedefTable.addToEnclosingScope( TypedefTable::TD );
1254	$$ = $2->addTypedef();
1255	}
1256	\| TYPEDEF cfa_function_specifier
1257	{
1258	typedefTable.addToEnclosingScope( TypedefTable::TD );
1259	$$ = $2->addTypedef();
1260	}
1261	\| cfa_typedef_declaration pop ',' push no_attr_identifier
1262	{
1263	typedefTable.addToEnclosingScope( *$5, TypedefTable::TD );
1264	$$ = $1->appendList( $1->cloneType( $5 ) );
1265	}
1266	;
1267
1268	// Traditionally typedef is part of storage-class specifier for syntactic convenience only. Here, it is factored out as
1269	// a separate form of declaration, which syntactically precludes storage-class specifiers and initialization.
1270
1271	typedef_declaration:
1272	TYPEDEF type_specifier declarator
1273	{
1274	typedefTable.addToEnclosingScope( TypedefTable::TD );
1275	$$ = $3->addType( $2 )->addTypedef();
1276	}
1277	\| typedef_declaration pop ',' push declarator
1278	{
1279	typedefTable.addToEnclosingScope( TypedefTable::TD );
1280	$$ = $1->appendList( $1->cloneBaseType( $5 )->addTypedef() );
1281	}
1282	\| type_qualifier_list TYPEDEF type_specifier declarator // remaining OBSOLESCENT (see 2 )
1283	{
1284	typedefTable.addToEnclosingScope( TypedefTable::TD );
1285	$$ = $4->addType( $3 )->addQualifiers( $1 )->addTypedef();
1286	}
1287	\| type_specifier TYPEDEF declarator
1288	{
1289	typedefTable.addToEnclosingScope( TypedefTable::TD );
1290	$$ = $3->addType( $1 )->addTypedef();
1291	}
1292	\| type_specifier TYPEDEF type_qualifier_list declarator
1293	{
1294	typedefTable.addToEnclosingScope( TypedefTable::TD );
1295	$$ = $4->addQualifiers( $1 )->addTypedef()->addType( $1 );
1296	}
1297	;
1298
1299	typedef_expression:
1300	// GCC, naming expression type: typedef name = exp; gives a name to the type of an expression
1301	TYPEDEF no_attr_identifier '=' assignment_expression
1302	{
1303	typedefTable.addToEnclosingScope( *$2, TypedefTable::TD );
1304	$$ = DeclarationNode::newName( 0 ); // unimplemented
1305	}
1306	\| typedef_expression pop ',' push no_attr_identifier '=' assignment_expression
1307	{
1308	typedefTable.addToEnclosingScope( *$5, TypedefTable::TD );
1309	$$ = DeclarationNode::newName( 0 ); // unimplemented
1310	}
1311	;
1312
1313	//c_declaration:
1314	// declaring_list pop ';'
1315	// \| typedef_declaration pop ';'
1316	// \| typedef_expression pop ';' // GCC, naming expression type
1317	// \| sue_declaration_specifier pop ';'
1318	// ;
1319	//
1320	//declaring_list:
1321	// // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
1322	// // storage-class
1323	// declarator asm_name_opt initializer_opt
1324	// {
1325	// typedefTable.addToEnclosingScope( TypedefTable::ID );
1326	// $$ = ( $2->addType( $1 ))->addAsmName( $3 )->addInitializer( $4 );
1327	// }
1328	// \| declaring_list ',' attribute_list_opt declarator asm_name_opt initializer_opt
1329	// {
1330	// typedefTable.addToEnclosingScope( TypedefTable::ID );
1331	// $$ = $1->appendList( $1->cloneBaseType( $4->addAsmName( $5 )->addInitializer( $6 ) ) );
1332	// }
1333	// ;
1334
1335	c_declaration:
1336	declaration_specifier declaring_list pop ';'
1337	{
1338	$$ = distAttr( $1, $2 );
1339	}
1340	\| typedef_declaration pop ';'
1341	\| typedef_expression pop ';' // GCC, naming expression type
1342	\| sue_declaration_specifier pop ';'
1343	;
1344
1345	declaring_list:
1346	// A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
1347	// storage-class
1348	declarator asm_name_opt initializer_opt
1349	{
1350	typedefTable.addToEnclosingScope( TypedefTable::ID );
1351	$$ = $1->addAsmName( $2 )->addInitializer( $3 );
1352	}
1353	\| declaring_list ',' attribute_list_opt declarator asm_name_opt initializer_opt
1354	{
1355	typedefTable.addToEnclosingScope( TypedefTable::ID );
1356	$$ = $1->appendList( $4->addQualifiers( $3 )->addAsmName( $5 )->addInitializer( $6 ) );
1357	}
1358	;
1359
1360	declaration_specifier: // type specifier + storage class
1361	basic_declaration_specifier
1362	\| sue_declaration_specifier
1363	\| type_declaration_specifier
1364	;
1365
1366	declaration_specifier_nobody: // type specifier + storage class - {...}
1367	// Preclude SUE declarations in restricted scopes:
1368	//
1369	// int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... }
1370	//
1371	// because it is impossible to call f due to name equivalence.
1372	basic_declaration_specifier
1373	\| sue_declaration_specifier_nobody
1374	\| type_declaration_specifier
1375	;
1376
1377	type_specifier: // type specifier
1378	basic_type_specifier
1379	\| sue_type_specifier
1380	\| type_type_specifier
1381	;
1382
1383	type_specifier_nobody: // type specifier - {...}
1384	// Preclude SUE declarations in restricted scopes:
1385	//
1386	// int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... }
1387	//
1388	// because it is impossible to call f due to name equivalence.
1389	basic_type_specifier
1390	\| sue_type_specifier_nobody
1391	\| type_type_specifier
1392	;
1393
1394	type_qualifier_list_opt: // GCC, used in asm_statement
1395	// empty
1396	{ $$ = nullptr; }
1397	\| type_qualifier_list
1398	;
1399
1400	type_qualifier_list:
1401	// A semantic check is necessary to ensure a type qualifier is appropriate for the kind of declaration.
1402	//
1403	// ISO/IEC 9899:1999 Section 6.7.3(4 ) : If the same qualifier appears more than once in the same
1404	// specifier-qualifier-list, either directly or via one or more typedefs, the behavior is the same as if it
1405	// appeared only once.
1406	type_qualifier
1407	\| type_qualifier_list type_qualifier
1408	{ $$ = $1->addQualifiers( $2 ); }
1409	;
1410
1411	type_qualifier:
1412	type_qualifier_name
1413	\| attribute
1414	;
1415
1416	type_qualifier_name:
1417	CONST
1418	{ $$ = DeclarationNode::newTypeQualifier( Type::Const ); }
1419	\| RESTRICT
1420	{ $$ = DeclarationNode::newTypeQualifier( Type::Restrict ); }
1421	\| VOLATILE
1422	{ $$ = DeclarationNode::newTypeQualifier( Type::Volatile ); }
1423	\| LVALUE // CFA
1424	{ $$ = DeclarationNode::newTypeQualifier( Type::Lvalue ); }
1425	\| MUTEX
1426	{ $$ = DeclarationNode::newTypeQualifier( Type::Mutex ); }
1427	\| ATOMIC
1428	{ $$ = DeclarationNode::newTypeQualifier( Type::Atomic ); }
1429	\| FORALL '('
1430	{
1431	typedefTable.enterScope();
1432	}
1433	type_parameter_list ')' // CFA
1434	{
1435	typedefTable.leaveScope();
1436	$$ = DeclarationNode::newForall( $4 );
1437	}
1438	;
1439
1440	declaration_qualifier_list:
1441	storage_class_list
1442	\| type_qualifier_list storage_class_list // remaining OBSOLESCENT (see 2 )
1443	{ $$ = $1->addQualifiers( $2 ); }
1444	\| declaration_qualifier_list type_qualifier_list storage_class_list
1445	{ $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1446	;
1447
1448	storage_class_list:
1449	// A semantic check is necessary to ensure a storage class is appropriate for the kind of declaration and that
1450	// only one of each is specified, except for inline, which can appear with the others.
1451	//
1452	// ISO/IEC 9899:1999 Section 6.7.1(2) : At most, one storage-class specifier may be given in the declaration
1453	// specifiers in a declaration.
1454	storage_class
1455	\| storage_class_list storage_class
1456	{ $$ = $1->addQualifiers( $2 ); }
1457	;
1458
1459	storage_class:
1460	EXTERN
1461	{ $$ = DeclarationNode::newStorageClass( Type::Extern ); }
1462	\| STATIC
1463	{ $$ = DeclarationNode::newStorageClass( Type::Static ); }
1464	\| AUTO
1465	{ $$ = DeclarationNode::newStorageClass( Type::Auto ); }
1466	\| REGISTER
1467	{ $$ = DeclarationNode::newStorageClass( Type::Register ); }
1468	\| THREADLOCAL // C11
1469	{ $$ = DeclarationNode::newStorageClass( Type::Threadlocal ); }
1470	// Put function specifiers here to simplify parsing rules, but separate them semantically.
1471	\| INLINE // C99
1472	{ $$ = DeclarationNode::newFuncSpecifier( Type::Inline ); }
1473	\| FORTRAN // C99
1474	{ $$ = DeclarationNode::newFuncSpecifier( Type::Fortran ); }
1475	\| NORETURN // C11
1476	{ $$ = DeclarationNode::newFuncSpecifier( Type::Noreturn ); }
1477	;
1478
1479	basic_type_name:
1480	CHAR
1481	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Char ); }
1482	\| DOUBLE
1483	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Double ); }
1484	\| FLOAT
1485	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Float ); }
1486	\| INT
1487	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Int ); }
1488	\| LONG
1489	{ $$ = DeclarationNode::newLength( DeclarationNode::Long ); }
1490	\| SHORT
1491	{ $$ = DeclarationNode::newLength( DeclarationNode::Short ); }
1492	\| SIGNED
1493	{ $$ = DeclarationNode::newSignedNess( DeclarationNode::Signed ); }
1494	\| UNSIGNED
1495	{ $$ = DeclarationNode::newSignedNess( DeclarationNode::Unsigned ); }
1496	\| VOID
1497	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Void ); }
1498	\| BOOL // C99
1499	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Bool ); }
1500	\| COMPLEX // C99
1501	{ $$ = DeclarationNode::newComplexType( DeclarationNode::Complex ); }
1502	\| IMAGINARY // C99
1503	{ $$ = DeclarationNode::newComplexType( DeclarationNode::Imaginary ); }
1504	\| VALIST // GCC, __builtin_va_list
1505	{ $$ = DeclarationNode::newBuiltinType( DeclarationNode::Valist ); }
1506	\| ZERO_T
1507	{ $$ = DeclarationNode::newBuiltinType( DeclarationNode::Zero ); }
1508	\| ONE_T
1509	{ $$ = DeclarationNode::newBuiltinType( DeclarationNode::One ); }
1510	;
1511
1512	basic_declaration_specifier:
1513	// A semantic check is necessary for conflicting storage classes.
1514	basic_type_specifier
1515	\| declaration_qualifier_list basic_type_specifier
1516	{ $$ = $2->addQualifiers( $1 ); }
1517	\| basic_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1518	{ $$ = $1->addQualifiers( $2 ); }
1519	\| basic_declaration_specifier storage_class type_qualifier_list
1520	{ $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1521	\| basic_declaration_specifier storage_class basic_type_specifier
1522	{ $$ = $3->addQualifiers( $2 )->addType( $1 ); }
1523	;
1524
1525	basic_type_specifier:
1526	direct_type
1527	\| type_qualifier_list_opt indirect_type type_qualifier_list_opt
1528	{ $$ = $2->addQualifiers( $1 )->addQualifiers( $3 ); }
1529	;
1530
1531	direct_type:
1532	// A semantic check is necessary for conflicting type qualifiers.
1533	basic_type_name
1534	\| type_qualifier_list basic_type_name
1535	{ $$ = $2->addQualifiers( $1 ); }
1536	\| direct_type type_qualifier
1537	{ $$ = $1->addQualifiers( $2 ); }
1538	\| direct_type basic_type_name
1539	{ $$ = $1->addType( $2 ); }
1540	;
1541
1542	indirect_type:
1543	TYPEOF '(' type ')' // GCC: typeof(x) y;
1544	{ $$ = $3; }
1545	\| TYPEOF '(' comma_expression ')' // GCC: typeof(a+b) y;
1546	{ $$ = DeclarationNode::newTypeof( $3 ); }
1547	\| ATTR_TYPEGENname '(' type ')' // CFA: e.g., @type(x) y;
1548	{ $$ = DeclarationNode::newAttr( $1, $3 ); }
1549	\| ATTR_TYPEGENname '(' comma_expression ')' // CFA: e.g., @type(a+b) y;
1550	{ $$ = DeclarationNode::newAttr( $1, $3 ); }
1551	;
1552
1553	sue_declaration_specifier: // struct, union, enum + storage class + type specifier
1554	sue_type_specifier
1555	\| declaration_qualifier_list sue_type_specifier
1556	{ $$ = $2->addQualifiers( $1 ); }
1557	\| sue_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1558	{ $$ = $1->addQualifiers( $2 ); }
1559	\| sue_declaration_specifier storage_class type_qualifier_list
1560	{ $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1561	;
1562
1563	sue_type_specifier: // struct, union, enum + type specifier
1564	elaborated_type
1565	\| type_qualifier_list
1566	{ if ( $1->type != nullptr && $1->type->forall ) forall = true; } // remember generic type
1567	elaborated_type
1568	{ $$ = $3->addQualifiers( $1 ); }
1569	\| sue_type_specifier type_qualifier
1570	{ $$ = $1->addQualifiers( $2 ); }
1571	;
1572
1573	sue_declaration_specifier_nobody: // struct, union, enum - {...} + storage class + type specifier
1574	sue_type_specifier_nobody
1575	\| declaration_qualifier_list sue_type_specifier_nobody
1576	{ $$ = $2->addQualifiers( $1 ); }
1577	\| sue_declaration_specifier_nobody storage_class // remaining OBSOLESCENT (see 2)
1578	{ $$ = $1->addQualifiers( $2 ); }
1579	\| sue_declaration_specifier_nobody storage_class type_qualifier_list
1580	{ $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1581	;
1582
1583	sue_type_specifier_nobody: // struct, union, enum - {...} + type specifier
1584	elaborated_type_nobody
1585	\| type_qualifier_list elaborated_type_nobody
1586	{ $$ = $2->addQualifiers( $1 ); }
1587	\| sue_type_specifier_nobody type_qualifier
1588	{ $$ = $1->addQualifiers( $2 ); }
1589	;
1590
1591	type_declaration_specifier:
1592	type_type_specifier
1593	\| declaration_qualifier_list type_type_specifier
1594	{ $$ = $2->addQualifiers( $1 ); }
1595	\| type_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1596	{ $$ = $1->addQualifiers( $2 ); }
1597	\| type_declaration_specifier storage_class type_qualifier_list
1598	{ $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1599	;
1600
1601	type_type_specifier: // typedef types
1602	type_name
1603	\| type_qualifier_list type_name
1604	{ $$ = $2->addQualifiers( $1 ); }
1605	\| type_type_specifier type_qualifier
1606	{ $$ = $1->addQualifiers( $2 ); }
1607	;
1608
1609	type_name:
1610	TYPEDEFname
1611	{ $$ = DeclarationNode::newFromTypedef( $1 ); }
1612	\| '.' TYPEDEFname
1613	{ $$ = DeclarationNode::newFromTypedef( $2 ); } // FIX ME
1614	\| type_name '.' TYPEDEFname
1615	{ $$ = DeclarationNode::newFromTypedef( $3 ); } // FIX ME
1616	\| typegen_name
1617	\| '.' typegen_name
1618	{ $$ = $2; } // FIX ME
1619	\| type_name '.' typegen_name
1620	{ $$ = $3; } // FIX ME
1621	;
1622
1623	typegen_name: // CFA
1624	TYPEGENname '(' ')'
1625	{ $$ = DeclarationNode::newFromTypeGen( $1, nullptr ); }
1626	\| TYPEGENname '(' type_list ')'
1627	{ $$ = DeclarationNode::newFromTypeGen( $1, $3 ); }
1628	;
1629
1630	elaborated_type: // struct, union, enum
1631	aggregate_type
1632	\| enum_type
1633	;
1634
1635	elaborated_type_nobody: // struct, union, enum - {...}
1636	aggregate_type_nobody
1637	\| enum_type_nobody
1638	;
1639
1640	aggregate_type: // struct, union
1641	aggregate_key attribute_list_opt '{' field_declaration_list '}'
1642	{ $$ = DeclarationNode::newAggregate( $1, new string( DeclarationNode::anonymous.newName() ), nullptr, $4, true )->addQualifiers( $2 ); }
1643	\| aggregate_key attribute_list_opt no_attr_identifier_or_type_name
1644	{
1645	typedefTable.makeTypedef( *$3 ); // create typedef
1646	if ( forall ) typedefTable.changeKind( *$3, TypedefTable::TG ); // possibly update
1647	forall = false; // reset
1648	}
1649	'{' field_declaration_list '}'
1650	{ $$ = DeclarationNode::newAggregate( $1, $3, nullptr, $6, true )->addQualifiers( $2 ); }
1651	\| aggregate_key attribute_list_opt '(' type_list ')' '{' field_declaration_list '}' // CFA
1652	{ $$ = DeclarationNode::newAggregate( $1, new string( DeclarationNode::anonymous.newName() ), $4, $7, false )->addQualifiers( $2 ); }
1653	\| aggregate_type_nobody
1654	;
1655
1656	aggregate_type_nobody: // struct, union - {...}
1657	aggregate_key attribute_list_opt no_attr_identifier
1658	{
1659	typedefTable.makeTypedef( *$3 );
1660	$$ = DeclarationNode::newAggregate( $1, $3, nullptr, nullptr, false )->addQualifiers( $2 );
1661	}
1662	\| aggregate_key attribute_list_opt TYPEDEFname
1663	{
1664	typedefTable.makeTypedef( *$3 );
1665	$$ = DeclarationNode::newAggregate( $1, $3, nullptr, nullptr, false )->addQualifiers( $2 );
1666	}
1667	\| aggregate_key attribute_list_opt typegen_name // CFA
1668	{ $$ = $3->addQualifiers( $2 ); }
1669	;
1670
1671	aggregate_key:
1672	STRUCT
1673	{ $$ = DeclarationNode::Struct; }
1674	\| UNION
1675	{ $$ = DeclarationNode::Union; }
1676	\| COROUTINE
1677	{ $$ = DeclarationNode::Coroutine; }
1678	\| MONITOR
1679	{ $$ = DeclarationNode::Monitor; }
1680	\| THREAD
1681	{ $$ = DeclarationNode::Thread; }
1682	;
1683
1684	field_declaration_list:
1685	// empty
1686	{ $$ = nullptr; }
1687	\| field_declaration_list field_declaration
1688	{ $$ = $1 ? $1->appendList( $2 ) : $2; }
1689	;
1690
1691	field_declaration:
1692	cfa_field_declaring_list ';' // CFA, new style field declaration
1693	\| EXTENSION cfa_field_declaring_list ';' // GCC
1694	{
1695	distExt( $2 ); // mark all fields in list
1696	$$ = $2;
1697	}
1698	\| type_specifier field_declaring_list ';'
1699	{
1700	$$ = distAttr( $1, $2 ); }
1701	\| EXTENSION type_specifier field_declaring_list ';' // GCC
1702	{
1703	distExt( $3 ); // mark all fields in list
1704	$$ = distAttr( $2, $3 );
1705	}
1706	;
1707
1708	cfa_field_declaring_list: // CFA, new style field declaration
1709	cfa_abstract_declarator_tuple // CFA, no field name
1710	\| cfa_abstract_declarator_tuple no_attr_identifier_or_type_name
1711	{ $$ = $1->addName( $2 ); }
1712	\| cfa_field_declaring_list ',' no_attr_identifier_or_type_name
1713	{ $$ = $1->appendList( $1->cloneType( $3 ) ); }
1714	\| cfa_field_declaring_list ',' // CFA, no field name
1715	{ $$ = $1->appendList( $1->cloneType( 0 ) ); }
1716	;
1717
1718	field_declaring_list:
1719	field_declarator
1720	\| field_declaring_list ',' attribute_list_opt field_declarator
1721	{ $$ = $1->appendList( $4->addQualifiers( $3 ) ); }
1722	;
1723
1724	field_declarator:
1725	// empty
1726	{ $$ = DeclarationNode::newName( 0 ); /* XXX */ } // CFA, no field name
1727	// '@'
1728	// { $$ = DeclarationNode::newName( new string( DeclarationNode::anonymous.newName() ) ); } // CFA, no field name
1729	\| bit_subrange_size // no field name
1730	{ $$ = DeclarationNode::newBitfield( $1 ); }
1731	\| variable_declarator bit_subrange_size_opt
1732	// A semantic check is required to ensure bit_subrange only appears on base type int.
1733	{ $$ = $1->addBitfield( $2 ); }
1734	\| variable_type_redeclarator bit_subrange_size_opt
1735	// A semantic check is required to ensure bit_subrange only appears on base type int.
1736	{ $$ = $1->addBitfield( $2 ); }
1737	\| variable_abstract_declarator // CFA, no field name
1738	;
1739
1740	bit_subrange_size_opt:
1741	// empty
1742	{ $$ = nullptr; }
1743	\| bit_subrange_size
1744	{ $$ = $1; }
1745	;
1746
1747	bit_subrange_size:
1748	':' constant_expression
1749	{ $$ = $2; }
1750	;
1751
1752	enum_type: // enum
1753	ENUM attribute_list_opt '{' enumerator_list comma_opt '}'
1754	{ $$ = DeclarationNode::newEnum( new string( DeclarationNode::anonymous.newName() ), $4, true )->addQualifiers( $2 ); }
1755	\| ENUM attribute_list_opt no_attr_identifier_or_type_name
1756	{ typedefTable.makeTypedef( *$3 ); }
1757	'{' enumerator_list comma_opt '}'
1758	{ $$ = DeclarationNode::newEnum( $3, $6, true )->addQualifiers( $2 ); }
1759	\| enum_type_nobody
1760	;
1761
1762	enum_type_nobody: // enum - {...}
1763	ENUM attribute_list_opt no_attr_identifier_or_type_name
1764	{
1765	typedefTable.makeTypedef( *$3 );
1766	$$ = DeclarationNode::newEnum( $3, 0, false )->addQualifiers( $2 );
1767	}
1768	;
1769
1770	enumerator_list:
1771	no_attr_identifier_or_type_name enumerator_value_opt
1772	{ $$ = DeclarationNode::newEnumConstant( $1, $2 ); }
1773	\| enumerator_list ',' no_attr_identifier_or_type_name enumerator_value_opt
1774	{ $$ = $1->appendList( DeclarationNode::newEnumConstant( $3, $4 ) ); }
1775	;
1776
1777	enumerator_value_opt:
1778	// empty
1779	{ $$ = nullptr; }
1780	\| '=' constant_expression
1781	{ $$ = $2; }
1782	;
1783
1784	// Minimum of one parameter after which ellipsis is allowed only at the end.
1785
1786	cfa_parameter_type_list_opt: // CFA
1787	// empty
1788	{ $$ = nullptr; }
1789	\| cfa_parameter_type_list
1790	;
1791
1792	cfa_parameter_type_list: // CFA, abstract + real
1793	cfa_abstract_parameter_list
1794	\| cfa_parameter_list
1795	\| cfa_parameter_list pop ',' push cfa_abstract_parameter_list
1796	{ $$ = $1->appendList( $5 ); }
1797	\| cfa_abstract_parameter_list pop ',' push ELLIPSIS
1798	{ $$ = $1->addVarArgs(); }
1799	\| cfa_parameter_list pop ',' push ELLIPSIS
1800	{ $$ = $1->addVarArgs(); }
1801	;
1802
1803	cfa_parameter_list: // CFA
1804	// To obtain LR(1) between cfa_parameter_list and cfa_abstract_tuple, the last cfa_abstract_parameter_list is
1805	// factored out from cfa_parameter_list, flattening the rules to get lookahead to the ']'.
1806	cfa_parameter_declaration
1807	\| cfa_abstract_parameter_list pop ',' push cfa_parameter_declaration
1808	{ $$ = $1->appendList( $5 ); }
1809	\| cfa_parameter_list pop ',' push cfa_parameter_declaration
1810	{ $$ = $1->appendList( $5 ); }
1811	\| cfa_parameter_list pop ',' push cfa_abstract_parameter_list pop ',' push cfa_parameter_declaration
1812	{ $$ = $1->appendList( $5 )->appendList( $9 ); }
1813	;
1814
1815	cfa_abstract_parameter_list: // CFA, new & old style abstract
1816	cfa_abstract_parameter_declaration
1817	\| cfa_abstract_parameter_list pop ',' push cfa_abstract_parameter_declaration
1818	{ $$ = $1->appendList( $5 ); }
1819	;
1820
1821	parameter_type_list_opt:
1822	// empty
1823	{ $$ = nullptr; }
1824	\| parameter_type_list
1825	;
1826
1827	parameter_type_list:
1828	parameter_list
1829	\| parameter_list pop ',' push ELLIPSIS
1830	{ $$ = $1->addVarArgs(); }
1831	;
1832
1833	parameter_list: // abstract + real
1834	abstract_parameter_declaration
1835	\| parameter_declaration
1836	\| parameter_list pop ',' push abstract_parameter_declaration
1837	{ $$ = $1->appendList( $5 ); }
1838	\| parameter_list pop ',' push parameter_declaration
1839	{ $$ = $1->appendList( $5 ); }
1840	;
1841
1842	// Provides optional identifier names (abstract_declarator/variable_declarator), no initialization, different semantics
1843	// for typedef name by using type_parameter_redeclarator instead of typedef_redeclarator, and function prototypes.
1844
1845	cfa_parameter_declaration: // CFA, new & old style parameter declaration
1846	parameter_declaration
1847	\| cfa_identifier_parameter_declarator_no_tuple identifier_or_type_name assignment_opt
1848	{ $$ = $1->addName( $2 ); }
1849	\| cfa_abstract_tuple identifier_or_type_name assignment_opt
1850	// To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator).
1851	{ $$ = $1->addName( $2 ); }
1852	\| type_qualifier_list cfa_abstract_tuple identifier_or_type_name assignment_opt
1853	{ $$ = $2->addName( $3 )->addQualifiers( $1 ); }
1854	\| cfa_function_specifier
1855	;
1856
1857	cfa_abstract_parameter_declaration: // CFA, new & old style parameter declaration
1858	abstract_parameter_declaration
1859	\| cfa_identifier_parameter_declarator_no_tuple
1860	\| cfa_abstract_tuple
1861	// To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator).
1862	\| type_qualifier_list cfa_abstract_tuple
1863	{ $$ = $2->addQualifiers( $1 ); }
1864	\| cfa_abstract_function
1865	;
1866
1867	parameter_declaration:
1868	// No SUE declaration in parameter list.
1869	declaration_specifier_nobody identifier_parameter_declarator assignment_opt
1870	{
1871	typedefTable.addToEnclosingScope( TypedefTable::ID );
1872	$$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr );
1873	}
1874	\| declaration_specifier_nobody type_parameter_redeclarator assignment_opt
1875	{
1876	typedefTable.addToEnclosingScope( TypedefTable::ID );
1877	$$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr );
1878	}
1879	;
1880
1881	abstract_parameter_declaration:
1882	declaration_specifier_nobody assignment_opt
1883	{ $$ = $1->addInitializer( $2 ? new InitializerNode( $2 ) : nullptr ); }
1884	\| declaration_specifier_nobody abstract_parameter_declarator assignment_opt
1885	{ $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
1886	;
1887
1888	// ISO/IEC 9899:1999 Section 6.9.1(6) : "An identifier declared as a typedef name shall not be redeclared as a
1889	// parameter." Because the scope of the K&R-style parameter-list sees the typedef first, the following is based only on
1890	// identifiers. The ANSI-style parameter-list can redefine a typedef name.
1891
1892	identifier_list: // K&R-style parameter list => no types
1893	no_attr_identifier
1894	{ $$ = DeclarationNode::newName( $1 ); }
1895	\| identifier_list ',' no_attr_identifier
1896	{ $$ = $1->appendList( DeclarationNode::newName( $3 ) ); }
1897	;
1898
1899	identifier_or_type_name:
1900	identifier
1901	\| TYPEDEFname
1902	\| TYPEGENname
1903	;
1904
1905	no_attr_identifier_or_type_name:
1906	no_attr_identifier
1907	\| TYPEDEFname
1908	\| TYPEGENname
1909	;
1910
1911	type_no_function: // sizeof, alignof, cast (constructor)
1912	cfa_abstract_declarator_tuple // CFA
1913	\| type_specifier
1914	\| type_specifier abstract_declarator
1915	{ $$ = $2->addType( $1 ); }
1916	;
1917
1918	type: // typeof, assertion
1919	type_no_function
1920	\| cfa_abstract_function // CFA
1921	;
1922
1923	initializer_opt:
1924	// empty
1925	{ $$ = nullptr; }
1926	\| '=' initializer
1927	{ $$ = $2; }
1928	\| ATassign initializer
1929	{ $$ = $2->set_maybeConstructed( false ); }
1930	;
1931
1932	initializer:
1933	assignment_expression { $$ = new InitializerNode( $1 ); }
1934	\| '{' initializer_list comma_opt '}' { $$ = new InitializerNode( $2, true ); }
1935	;
1936
1937	initializer_list:
1938	// empty
1939	{ $$ = nullptr; }
1940	\| initializer
1941	\| designation initializer { $$ = $2->set_designators( $1 ); }
1942	\| initializer_list ',' initializer { $$ = (InitializerNode *)( $1->set_last( $3 ) ); }
1943	\| initializer_list ',' designation initializer
1944	{ $$ = (InitializerNode *)( $1->set_last( $4->set_designators( $3 ) ) ); }
1945	;
1946
1947	// There is an unreconcileable parsing problem between C99 and CFA with respect to designators. The problem is use of
1948	// '=' to separator the designator from the initializer value, as in:
1949	//
1950	// int x[10] = { [1] = 3 };
1951	//
1952	// The string "[1] = 3" can be parsed as a designator assignment or a tuple assignment. To disambiguate this case, CFA
1953	// changes the syntax from "=" to ":" as the separator between the designator and initializer. GCC does uses ":" for
1954	// field selection. The optional use of the "=" in GCC, or in this case ":", cannot be supported either due to
1955	// shift/reduce conflicts
1956
1957	designation:
1958	designator_list ':' // C99, CFA uses ":" instead of "="
1959	\| no_attr_identifier ':' // GCC, field name
1960	{ $$ = new ExpressionNode( build_varref( $1 ) ); }
1961	;
1962
1963	designator_list: // C99
1964	designator
1965	\| designator_list designator
1966	{ $$ = (ExpressionNode *)( $1->set_last( $2 ) ); }
1967	//\| designator_list designator { $$ = new ExpressionNode( $1, $2 ); }
1968	;
1969
1970	designator:
1971	'.' no_attr_identifier // C99, field name
1972	{ $$ = new ExpressionNode( build_varref( $2 ) ); }
1973	\| '[' push assignment_expression pop ']' // C99, single array element
1974	// assignment_expression used instead of constant_expression because of shift/reduce conflicts with tuple.
1975	{ $$ = $3; }
1976	\| '[' push subrange pop ']' // CFA, multiple array elements
1977	{ $$ = $3; }
1978	\| '[' push constant_expression ELLIPSIS constant_expression pop ']' // GCC, multiple array elements
1979	{ $$ = new ExpressionNode( build_range( $3, $5 ) ); }
1980	\| '.' '[' push field_list pop ']' // CFA, tuple field selector
1981	{ $$ = $4; }
1982	;
1983
1984	// The CFA type system is based on parametric polymorphism, the ability to declare functions with type parameters,
1985	// rather than an object-oriented type system. This required four groups of extensions:
1986	//
1987	// Overloading: function, data, and operator identifiers may be overloaded.
1988	//
1989	// Type declarations: "type" is used to generate new types for declaring objects. Similarly, "dtype" is used for object
1990	// and incomplete types, and "ftype" is used for function types. Type declarations with initializers provide
1991	// definitions of new types. Type declarations with storage class "extern" provide opaque types.
1992	//
1993	// Polymorphic functions: A forall clause declares a type parameter. The corresponding argument is inferred at the call
1994	// site. A polymorphic function is not a template; it is a function, with an address and a type.
1995	//
1996	// Specifications and Assertions: Specifications are collections of declarations parameterized by one or more
1997	// types. They serve many of the purposes of abstract classes, and specification hierarchies resemble subclass
1998	// hierarchies. Unlike classes, they can define relationships between types. Assertions declare that a type or
1999	// types provide the operations declared by a specification. Assertions are normally used to declare requirements
2000	// on type arguments of polymorphic functions.
2001
2002	type_parameter_list: // CFA
2003	type_parameter
2004	{ $$ = $1; }
2005	\| type_parameter_list ',' type_parameter
2006	{ $$ = $1->appendList( $3 ); }
2007	;
2008
2009	type_initializer_opt: // CFA
2010	// empty
2011	{ $$ = nullptr; }
2012	\| '=' type
2013	{ $$ = $2; }
2014	;
2015
2016	type_parameter: // CFA
2017	type_class no_attr_identifier_or_type_name
2018	{ typedefTable.addToEnclosingScope( *$2, TypedefTable::TD ); }
2019	type_initializer_opt assertion_list_opt
2020	{ $$ = DeclarationNode::newTypeParam( $1, $2 )->addTypeInitializer( $4 )->addAssertions( $5 ); }
2021	\| type_specifier identifier_parameter_declarator
2022	;
2023
2024	type_class: // CFA
2025	OTYPE
2026	{ $$ = DeclarationNode::Otype; }
2027	\| DTYPE
2028	{ $$ = DeclarationNode::Dtype; }
2029	\| FTYPE
2030	{ $$ = DeclarationNode::Ftype; }
2031	\| TTYPE
2032	{ $$ = DeclarationNode::Ttype; }
2033	;
2034
2035	assertion_list_opt: // CFA
2036	// empty
2037	{ $$ = nullptr; }
2038	\| assertion_list_opt assertion
2039	{ $$ = $1 ? $1->appendList( $2 ) : $2; }
2040	;
2041
2042	assertion: // CFA
2043	'\|' no_attr_identifier_or_type_name '(' type_list ')'
2044	{
2045	typedefTable.openTrait( *$2 );
2046	$$ = DeclarationNode::newTraitUse( $2, $4 );
2047	}
2048	\| '\|' '{' push trait_declaration_list '}'
2049	{ $$ = $4; }
2050	\| '\|' '(' push type_parameter_list pop ')' '{' push trait_declaration_list '}' '(' type_list ')'
2051	{ $$ = nullptr; }
2052	;
2053
2054	type_list: // CFA
2055	type
2056	{ $$ = new ExpressionNode( build_typevalue( $1 ) ); }
2057	\| assignment_expression
2058	\| type_list ',' type
2059	{ $$ = (ExpressionNode *)( $1->set_last( new ExpressionNode( build_typevalue( $3 ) ) ) ); }
2060	\| type_list ',' assignment_expression
2061	{ $$ = (ExpressionNode *)( $1->set_last( $3 )); }
2062	;
2063
2064	type_declaring_list: // CFA
2065	OTYPE type_declarator
2066	{ $$ = $2; }
2067	\| storage_class_list OTYPE type_declarator
2068	{ $$ = $3->addQualifiers( $1 ); }
2069	\| type_declaring_list ',' type_declarator
2070	{ $$ = $1->appendList( $3->copySpecifiers( $1 ) ); }
2071	;
2072
2073	type_declarator: // CFA
2074	type_declarator_name assertion_list_opt
2075	{ $$ = $1->addAssertions( $2 ); }
2076	\| type_declarator_name assertion_list_opt '=' type
2077	{ $$ = $1->addAssertions( $2 )->addType( $4 ); }
2078	;
2079
2080	type_declarator_name: // CFA
2081	no_attr_identifier_or_type_name
2082	{
2083	typedefTable.addToEnclosingScope( *$1, TypedefTable::TD );
2084	$$ = DeclarationNode::newTypeDecl( $1, 0 );
2085	}
2086	\| no_attr_identifier_or_type_name '(' push type_parameter_list pop ')'
2087	{
2088	typedefTable.addToEnclosingScope( *$1, TypedefTable::TG );
2089	$$ = DeclarationNode::newTypeDecl( $1, $4 );
2090	}
2091	;
2092
2093	trait_specifier: // CFA
2094	TRAIT no_attr_identifier_or_type_name '(' push type_parameter_list pop ')' '{' '}'
2095	{
2096	typedefTable.addToEnclosingScope( *$2, TypedefTable::ID );
2097	$$ = DeclarationNode::newTrait( $2, $5, 0 );
2098	}
2099	\| TRAIT no_attr_identifier_or_type_name '(' push type_parameter_list pop ')' '{'
2100	{
2101	typedefTable.enterTrait( *$2 );
2102	typedefTable.enterScope();
2103	}
2104	trait_declaration_list '}'
2105	{
2106	typedefTable.leaveTrait();
2107	typedefTable.addToEnclosingScope( *$2, TypedefTable::ID );
2108	$$ = DeclarationNode::newTrait( $2, $5, $10 );
2109	}
2110	;
2111
2112	trait_declaration_list: // CFA
2113	trait_declaration
2114	\| trait_declaration_list push trait_declaration
2115	{ $$ = $1->appendList( $3 ); }
2116	;
2117
2118	trait_declaration: // CFA
2119	cfa_trait_declaring_list pop ';'
2120	\| trait_declaring_list pop ';'
2121	;
2122
2123	cfa_trait_declaring_list: // CFA
2124	cfa_variable_specifier
2125	{
2126	typedefTable.addToEnclosingScope2( TypedefTable::ID );
2127	$$ = $1;
2128	}
2129	\| cfa_function_specifier
2130	{
2131	typedefTable.addToEnclosingScope2( TypedefTable::ID );
2132	$$ = $1;
2133	}
2134	\| cfa_trait_declaring_list pop ',' push identifier_or_type_name
2135	{
2136	typedefTable.addToEnclosingScope2( *$5, TypedefTable::ID );
2137	$$ = $1->appendList( $1->cloneType( $5 ) );
2138	}
2139	;
2140
2141	trait_declaring_list: // CFA
2142	type_specifier declarator
2143	{
2144	typedefTable.addToEnclosingScope2( TypedefTable::ID );
2145	$$ = $2->addType( $1 );
2146	}
2147	\| trait_declaring_list pop ',' push declarator
2148	{
2149	typedefTable.addToEnclosingScope2( TypedefTable::ID );
2150	$$ = $1->appendList( $1->cloneBaseType( $5 ) );
2151	}
2152	;
2153
2154	//*************************** EXTERNAL DEFINITIONS ***************************
2155
2156	translation_unit:
2157	// empty
2158	{} // empty input file
2159	\| external_definition_list
2160	{ parseTree = parseTree ? parseTree->appendList( $1 ) : $1; }
2161	;
2162
2163	external_definition_list:
2164	external_definition
2165	\| external_definition_list push external_definition
2166	{ $$ = $1 ? $1->appendList( $3 ) : $3; }
2167	;
2168
2169	external_definition_list_opt:
2170	// empty
2171	{ $$ = nullptr; }
2172	\| external_definition_list
2173	;
2174
2175	external_definition:
2176	declaration
2177	\| external_function_definition
2178	\| ASM '(' string_literal ')' ';' // GCC, global assembler statement
2179	{
2180	$$ = DeclarationNode::newAsmStmt( new StatementNode( build_asmstmt( false, $3, 0 ) ) );
2181	}
2182	\| EXTERN STRINGliteral // C++-style linkage specifier
2183	{
2184	linkageStack.push( linkage ); // handle nested extern "C"/"Cforall"
2185	linkage = LinkageSpec::linkageUpdate( linkage, $2 );
2186	}
2187	'{' external_definition_list_opt '}'
2188	{
2189	linkage = linkageStack.top();
2190	linkageStack.pop();
2191	$$ = $5;
2192	}
2193	\| EXTENSION external_definition // GCC, multiple __extension__ allowed, meaning unknown
2194	{
2195	distExt( $2 ); // mark all fields in list
2196	$$ = $2;
2197	}
2198	;
2199
2200	external_function_definition:
2201	function_definition
2202	// These rules are a concession to the "implicit int" type_specifier because there is a significant amount of
2203	// legacy code with global functions missing the type-specifier for the return type, and assuming "int".
2204	// Parsing is possible because function_definition does not appear in the context of an expression (nested
2205	// functions preclude this concession, i.e., all nested function must have a return type). A function prototype
2206	// declaration must still have a type_specifier. OBSOLESCENT (see 1)
2207	\| function_declarator compound_statement
2208	{
2209	typedefTable.addToEnclosingScope( TypedefTable::ID );
2210	typedefTable.leaveScope();
2211	$$ = $1->addFunctionBody( $2 );
2212	}
2213	\| KR_function_declarator push KR_declaration_list_opt compound_statement
2214	{
2215	typedefTable.addToEnclosingScope( TypedefTable::ID );
2216	typedefTable.leaveScope();
2217	$$ = $1->addOldDeclList( $3 )->addFunctionBody( $4 );
2218	}
2219	;
2220
2221	with_clause_opt:
2222	// empty
2223	{ $$ = (StatementNode *)0; } // FIX ME
2224	\| WITH identifier_list
2225	{ $$ = (StatementNode *)0; } // FIX ME
2226	;
2227
2228	function_definition:
2229	cfa_function_declaration with_clause_opt compound_statement // CFA
2230	{
2231	typedefTable.addToEnclosingScope( TypedefTable::ID );
2232	typedefTable.leaveScope();
2233	$$ = $1->addFunctionBody( $3 );
2234	}
2235	\| declaration_specifier function_declarator with_clause_opt compound_statement
2236	{
2237	typedefTable.addToEnclosingScope( TypedefTable::ID );
2238	typedefTable.leaveScope();
2239	$$ = $2->addFunctionBody( $4 )->addType( $1 );
2240	}
2241	\| type_qualifier_list function_declarator with_clause_opt compound_statement
2242	{
2243	typedefTable.addToEnclosingScope( TypedefTable::ID );
2244	typedefTable.leaveScope();
2245	$$ = $2->addFunctionBody( $4 )->addQualifiers( $1 );
2246	}
2247	\| declaration_qualifier_list function_declarator with_clause_opt compound_statement
2248	{
2249	typedefTable.addToEnclosingScope( TypedefTable::ID );
2250	typedefTable.leaveScope();
2251	$$ = $2->addFunctionBody( $4 )->addQualifiers( $1 );
2252	}
2253	\| declaration_qualifier_list type_qualifier_list function_declarator with_clause_opt compound_statement
2254	{
2255	typedefTable.addToEnclosingScope( TypedefTable::ID );
2256	typedefTable.leaveScope();
2257	$$ = $3->addFunctionBody( $5 )->addQualifiers( $2 )->addQualifiers( $1 );
2258	}
2259
2260	// Old-style K&R function definition, OBSOLESCENT (see 4)
2261	\| declaration_specifier KR_function_declarator push KR_declaration_list_opt with_clause_opt compound_statement
2262	{
2263	typedefTable.addToEnclosingScope( TypedefTable::ID );
2264	typedefTable.leaveScope();
2265	$$ = $2->addOldDeclList( $4 )->addFunctionBody( $6 )->addType( $1 );
2266	}
2267	\| type_qualifier_list KR_function_declarator push KR_declaration_list_opt with_clause_opt compound_statement
2268	{
2269	typedefTable.addToEnclosingScope( TypedefTable::ID );
2270	typedefTable.leaveScope();
2271	$$ = $2->addOldDeclList( $4 )->addFunctionBody( $6 )->addQualifiers( $1 );
2272	}
2273
2274	// Old-style K&R function definition with "implicit int" type_specifier, OBSOLESCENT (see 4)
2275	\| declaration_qualifier_list KR_function_declarator push KR_declaration_list_opt with_clause_opt compound_statement
2276	{
2277	typedefTable.addToEnclosingScope( TypedefTable::ID );
2278	typedefTable.leaveScope();
2279	$$ = $2->addOldDeclList( $4 )->addFunctionBody( $6 )->addQualifiers( $1 );
2280	}
2281	\| declaration_qualifier_list type_qualifier_list KR_function_declarator push KR_declaration_list_opt with_clause_opt compound_statement
2282	{
2283	typedefTable.addToEnclosingScope( TypedefTable::ID );
2284	typedefTable.leaveScope();
2285	$$ = $3->addOldDeclList( $5 )->addFunctionBody( $7 )->addQualifiers( $2 )->addQualifiers( $1 );
2286	}
2287	;
2288
2289	declarator:
2290	variable_declarator
2291	\| variable_type_redeclarator
2292	\| function_declarator
2293	;
2294
2295	subrange:
2296	constant_expression '~' constant_expression // CFA, integer subrange
2297	{ $$ = new ExpressionNode( build_range( $1, $3 ) ); }
2298	;
2299
2300	asm_name_opt: // GCC
2301	// empty
2302	{ $$ = nullptr; }
2303	\| ASM '(' string_literal ')' attribute_list_opt
2304	{
2305	DeclarationNode * name = new DeclarationNode();
2306	name->asmName = $3;
2307	$$ = name->addQualifiers( $5 );
2308	}
2309	;
2310
2311	attribute_list_opt: // GCC
2312	// empty
2313	{ $$ = nullptr; }
2314	\| attribute_list
2315	;
2316
2317	attribute_list: // GCC
2318	attribute
2319	\| attribute_list attribute
2320	{ $$ = $2->addQualifiers( $1 ); }
2321	;
2322
2323	attribute: // GCC
2324	ATTRIBUTE '(' '(' attribute_name_list ')' ')'
2325	{ $$ = $4; }
2326	;
2327
2328	attribute_name_list: // GCC
2329	attribute_name
2330	\| attribute_name_list ',' attribute_name
2331	{ $$ = $3->addQualifiers( $1 ); }
2332	;
2333
2334	attribute_name: // GCC
2335	// empty
2336	{ $$ = nullptr; }
2337	\| attr_name
2338	{ $$ = DeclarationNode::newAttribute( $1 ); }
2339	\| attr_name '(' argument_expression_list ')'
2340	{ $$ = DeclarationNode::newAttribute( $1, $3 ); }
2341	;
2342
2343	attr_name: // GCC
2344	IDENTIFIER
2345	\| TYPEDEFname
2346	\| TYPEGENname
2347	\| CONST
2348	{ $$ = Token{ new string( "__const__" ), { nullptr, -1 } }; }
2349	;
2350
2351	// ============================================================================
2352	// The following sections are a series of grammar patterns used to parse declarators. Multiple patterns are necessary
2353	// because the type of an identifier in wrapped around the identifier in the same form as its usage in an expression, as
2354	// in:
2355	//
2356	// int (*f())[10] { ... };
2357	// ... (*f())[3] += 1; // definition mimics usage
2358	//
2359	// Because these patterns are highly recursive, changes at a lower level in the recursion require copying some or all of
2360	// the pattern. Each of these patterns has some subtle variation to ensure correct syntax in a particular context.
2361	// ============================================================================
2362
2363	// ----------------------------------------------------------------------------
2364	// The set of valid declarators before a compound statement for defining a function is less than the set of declarators
2365	// to define a variable or function prototype, e.g.:
2366	//
2367	// valid declaration invalid definition
2368	// ----------------- ------------------
2369	// int f; int f {}
2370	// int f; int f {}
2371	// int f[10]; int f[10] {}
2372	// int (f)(int); int (f)(int) {}
2373	//
2374	// To preclude this syntactic anomaly requires separating the grammar rules for variable and function declarators, hence
2375	// variable_declarator and function_declarator.
2376	// ----------------------------------------------------------------------------
2377
2378	// This pattern parses a declaration of a variable that is not redefining a typedef name. The pattern precludes
2379	// declaring an array of functions versus a pointer to an array of functions.
2380
2381	variable_declarator:
2382	paren_identifier attribute_list_opt
2383	{ $$ = $1->addQualifiers( $2 ); }
2384	\| variable_ptr
2385	\| variable_array attribute_list_opt
2386	{ $$ = $1->addQualifiers( $2 ); }
2387	\| variable_function attribute_list_opt
2388	{ $$ = $1->addQualifiers( $2 ); }
2389	;
2390
2391	paren_identifier:
2392	identifier
2393	{
2394	typedefTable.setNextIdentifier( *$1 );
2395	$$ = DeclarationNode::newName( $1 );
2396	}
2397	\| '(' paren_identifier ')' // redundant parenthesis
2398	{ $$ = $2; }
2399	;
2400
2401	variable_ptr:
2402	ptrref_operator variable_declarator
2403	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2404	\| ptrref_operator type_qualifier_list variable_declarator
2405	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
2406	\| '(' variable_ptr ')' attribute_list_opt
2407	{ $$ = $2->addQualifiers( $4 ); } // redundant parenthesis
2408	;
2409
2410	variable_array:
2411	paren_identifier array_dimension
2412	{ $$ = $1->addArray( $2 ); }
2413	\| '(' variable_ptr ')' array_dimension
2414	{ $$ = $2->addArray( $4 ); }
2415	\| '(' variable_array ')' multi_array_dimension // redundant parenthesis
2416	{ $$ = $2->addArray( $4 ); }
2417	\| '(' variable_array ')' // redundant parenthesis
2418	{ $$ = $2; }
2419	;
2420
2421	variable_function:
2422	'(' variable_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2423	{ $$ = $2->addParamList( $6 ); }
2424	\| '(' variable_function ')' // redundant parenthesis
2425	{ $$ = $2; }
2426	;
2427
2428	// This pattern parses a function declarator that is not redefining a typedef name. For non-nested functions, there is
2429	// no context where a function definition can redefine a typedef name, i.e., the typedef and function name cannot exist
2430	// is the same scope. The pattern precludes returning arrays and functions versus pointers to arrays and functions.
2431
2432	function_declarator:
2433	function_no_ptr attribute_list_opt
2434	{ $$ = $1->addQualifiers( $2 ); }
2435	\| function_ptr
2436	\| function_array attribute_list_opt
2437	{ $$ = $1->addQualifiers( $2 ); }
2438	;
2439
2440	function_no_ptr:
2441	paren_identifier '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2442	{ $$ = $1->addParamList( $4 ); }
2443	\| '(' function_ptr ')' '(' push parameter_type_list_opt pop ')'
2444	{ $$ = $2->addParamList( $6 ); }
2445	\| '(' function_no_ptr ')' // redundant parenthesis
2446	{ $$ = $2; }
2447	;
2448
2449	function_ptr:
2450	ptrref_operator function_declarator
2451	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2452	\| ptrref_operator type_qualifier_list function_declarator
2453	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
2454	\| '(' function_ptr ')'
2455	{ $$ = $2; }
2456	;
2457
2458	function_array:
2459	'(' function_ptr ')' array_dimension
2460	{ $$ = $2->addArray( $4 ); }
2461	\| '(' function_array ')' multi_array_dimension // redundant parenthesis
2462	{ $$ = $2->addArray( $4 ); }
2463	\| '(' function_array ')' // redundant parenthesis
2464	{ $$ = $2; }
2465	;
2466
2467	// This pattern parses an old-style K&R function declarator (OBSOLESCENT, see 4)
2468	//
2469	// f( a, b, c ) int a, *b, c[]; {}
2470	//
2471	// that is not redefining a typedef name (see function_declarator for additional comments). The pattern precludes
2472	// returning arrays and functions versus pointers to arrays and functions.
2473
2474	KR_function_declarator:
2475	KR_function_no_ptr
2476	\| KR_function_ptr
2477	\| KR_function_array
2478	;
2479
2480	KR_function_no_ptr:
2481	paren_identifier '(' identifier_list ')' // function_declarator handles empty parameter
2482	{ $$ = $1->addIdList( $3 ); }
2483	\| '(' KR_function_ptr ')' '(' push parameter_type_list_opt pop ')'
2484	{ $$ = $2->addParamList( $6 ); }
2485	\| '(' KR_function_no_ptr ')' // redundant parenthesis
2486	{ $$ = $2; }
2487	;
2488
2489	KR_function_ptr:
2490	ptrref_operator KR_function_declarator
2491	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2492	\| ptrref_operator type_qualifier_list KR_function_declarator
2493	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
2494	\| '(' KR_function_ptr ')'
2495	{ $$ = $2; }
2496	;
2497
2498	KR_function_array:
2499	'(' KR_function_ptr ')' array_dimension
2500	{ $$ = $2->addArray( $4 ); }
2501	\| '(' KR_function_array ')' multi_array_dimension // redundant parenthesis
2502	{ $$ = $2->addArray( $4 ); }
2503	\| '(' KR_function_array ')' // redundant parenthesis
2504	{ $$ = $2; }
2505	;
2506
2507	// This pattern parses a declaration for a variable or function prototype that redefines a type name, e.g.:
2508	//
2509	// typedef int foo;
2510	// {
2511	// int foo; // redefine typedef name in new scope
2512	// }
2513	//
2514	// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
2515	// and functions versus pointers to arrays and functions.
2516
2517	variable_type_redeclarator:
2518	paren_type attribute_list_opt
2519	{ $$ = $1->addQualifiers( $2 ); }
2520	\| type_ptr
2521	\| type_array attribute_list_opt
2522	{ $$ = $1->addQualifiers( $2 ); }
2523	\| type_function attribute_list_opt
2524	{ $$ = $1->addQualifiers( $2 ); }
2525	;
2526
2527	paren_type:
2528	typedef
2529	\| '(' paren_type ')'
2530	{ $$ = $2; }
2531	;
2532
2533	type_ptr:
2534	ptrref_operator variable_type_redeclarator
2535	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2536	\| ptrref_operator type_qualifier_list variable_type_redeclarator
2537	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
2538	\| '(' type_ptr ')' attribute_list_opt
2539	{ $$ = $2->addQualifiers( $4 ); }
2540	;
2541
2542	type_array:
2543	paren_type array_dimension
2544	{ $$ = $1->addArray( $2 ); }
2545	\| '(' type_ptr ')' array_dimension
2546	{ $$ = $2->addArray( $4 ); }
2547	\| '(' type_array ')' multi_array_dimension // redundant parenthesis
2548	{ $$ = $2->addArray( $4 ); }
2549	\| '(' type_array ')' // redundant parenthesis
2550	{ $$ = $2; }
2551	;
2552
2553	type_function:
2554	paren_type '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2555	{ $$ = $1->addParamList( $4 ); }
2556	\| '(' type_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2557	{ $$ = $2->addParamList( $6 ); }
2558	\| '(' type_function ')' // redundant parenthesis
2559	{ $$ = $2; }
2560	;
2561
2562	// This pattern parses a declaration for a parameter variable of a function prototype or actual that is not redefining a
2563	// typedef name and allows the C99 array options, which can only appear in a parameter list. The pattern precludes
2564	// declaring an array of functions versus a pointer to an array of functions, and returning arrays and functions versus
2565	// pointers to arrays and functions.
2566
2567	identifier_parameter_declarator:
2568	paren_identifier attribute_list_opt
2569	{ $$ = $1->addQualifiers( $2 ); }
2570	\| identifier_parameter_ptr
2571	\| identifier_parameter_array attribute_list_opt
2572	{ $$ = $1->addQualifiers( $2 ); }
2573	\| identifier_parameter_function attribute_list_opt
2574	{ $$ = $1->addQualifiers( $2 ); }
2575	;
2576
2577	identifier_parameter_ptr:
2578	ptrref_operator identifier_parameter_declarator
2579	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2580	\| ptrref_operator type_qualifier_list identifier_parameter_declarator
2581	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
2582	\| '(' identifier_parameter_ptr ')' attribute_list_opt
2583	{ $$ = $2->addQualifiers( $4 ); }
2584	;
2585
2586	identifier_parameter_array:
2587	paren_identifier array_parameter_dimension
2588	{ $$ = $1->addArray( $2 ); }
2589	\| '(' identifier_parameter_ptr ')' array_dimension
2590	{ $$ = $2->addArray( $4 ); }
2591	\| '(' identifier_parameter_array ')' multi_array_dimension // redundant parenthesis
2592	{ $$ = $2->addArray( $4 ); }
2593	\| '(' identifier_parameter_array ')' // redundant parenthesis
2594	{ $$ = $2; }
2595	;
2596
2597	identifier_parameter_function:
2598	paren_identifier '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2599	{ $$ = $1->addParamList( $4 ); }
2600	\| '(' identifier_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2601	{ $$ = $2->addParamList( $6 ); }
2602	\| '(' identifier_parameter_function ')' // redundant parenthesis
2603	{ $$ = $2; }
2604	;
2605
2606	// This pattern parses a declaration for a parameter variable or function prototype that is redefining a typedef name,
2607	// e.g.:
2608	//
2609	// typedef int foo;
2610	// int f( int foo ); // redefine typedef name in new scope
2611	//
2612	// and allows the C99 array options, which can only appear in a parameter list.
2613
2614	type_parameter_redeclarator:
2615	typedef attribute_list_opt
2616	{ $$ = $1->addQualifiers( $2 ); }
2617	\| type_parameter_ptr
2618	\| type_parameter_array attribute_list_opt
2619	{ $$ = $1->addQualifiers( $2 ); }
2620	\| type_parameter_function attribute_list_opt
2621	{ $$ = $1->addQualifiers( $2 ); }
2622	;
2623
2624	typedef:
2625	TYPEDEFname
2626	{
2627	typedefTable.setNextIdentifier( *$1 );
2628	$$ = DeclarationNode::newName( $1 );
2629	}
2630	\| TYPEGENname
2631	{
2632	typedefTable.setNextIdentifier( *$1 );
2633	$$ = DeclarationNode::newName( $1 );
2634	}
2635	;
2636
2637	type_parameter_ptr:
2638	ptrref_operator type_parameter_redeclarator
2639	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2640	\| ptrref_operator type_qualifier_list type_parameter_redeclarator
2641	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
2642	\| '(' type_parameter_ptr ')' attribute_list_opt
2643	{ $$ = $2->addQualifiers( $4 ); }
2644	;
2645
2646	type_parameter_array:
2647	typedef array_parameter_dimension
2648	{ $$ = $1->addArray( $2 ); }
2649	\| '(' type_parameter_ptr ')' array_parameter_dimension
2650	{ $$ = $2->addArray( $4 ); }
2651	;
2652
2653	type_parameter_function:
2654	typedef '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2655	{ $$ = $1->addParamList( $4 ); }
2656	\| '(' type_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2657	{ $$ = $2->addParamList( $6 ); }
2658	;
2659
2660	// This pattern parses a declaration of an abstract variable or function prototype, i.e., there is no identifier to
2661	// which the type applies, e.g.:
2662	//
2663	// sizeof( int );
2664	// sizeof( int * );
2665	// sizeof( int [10] );
2666	// sizeof( int (*)() );
2667	// sizeof( int () );
2668	//
2669	// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
2670	// and functions versus pointers to arrays and functions.
2671
2672	abstract_declarator:
2673	abstract_ptr
2674	\| abstract_array attribute_list_opt
2675	{ $$ = $1->addQualifiers( $2 ); }
2676	\| abstract_function attribute_list_opt
2677	{ $$ = $1->addQualifiers( $2 ); }
2678	;
2679
2680	abstract_ptr:
2681	ptrref_operator
2682	{ $$ = DeclarationNode::newPointer( 0, $1 ); }
2683	\| ptrref_operator type_qualifier_list
2684	{ $$ = DeclarationNode::newPointer( $2, $1 ); }
2685	\| ptrref_operator abstract_declarator
2686	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2687	\| ptrref_operator type_qualifier_list abstract_declarator
2688	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
2689	\| '(' abstract_ptr ')' attribute_list_opt
2690	{ $$ = $2->addQualifiers( $4 ); }
2691	;
2692
2693	abstract_array:
2694	array_dimension
2695	\| '(' abstract_ptr ')' array_dimension
2696	{ $$ = $2->addArray( $4 ); }
2697	\| '(' abstract_array ')' multi_array_dimension // redundant parenthesis
2698	{ $$ = $2->addArray( $4 ); }
2699	\| '(' abstract_array ')' // redundant parenthesis
2700	{ $$ = $2; }
2701	;
2702
2703	abstract_function:
2704	'(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2705	{ $$ = DeclarationNode::newFunction( nullptr, nullptr, $3, nullptr ); }
2706	\| '(' abstract_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2707	{ $$ = $2->addParamList( $6 ); }
2708	\| '(' abstract_function ')' // redundant parenthesis
2709	{ $$ = $2; }
2710	;
2711
2712	array_dimension:
2713	// Only the first dimension can be empty.
2714	'[' ']'
2715	{ $$ = DeclarationNode::newArray( 0, 0, false ); }
2716	\| '[' ']' multi_array_dimension
2717	{ $$ = DeclarationNode::newArray( 0, 0, false )->addArray( $3 ); }
2718	\| multi_array_dimension
2719	;
2720
2721	multi_array_dimension:
2722	'[' push assignment_expression pop ']'
2723	{ $$ = DeclarationNode::newArray( $3, 0, false ); }
2724	\| '[' push '*' pop ']' // C99
2725	{ $$ = DeclarationNode::newVarArray( 0 ); }
2726	\| multi_array_dimension '[' push assignment_expression pop ']'
2727	{ $$ = $1->addArray( DeclarationNode::newArray( $4, 0, false ) ); }
2728	\| multi_array_dimension '[' push '*' pop ']' // C99
2729	{ $$ = $1->addArray( DeclarationNode::newVarArray( 0 ) ); }
2730	;
2731
2732	// This pattern parses a declaration of a parameter abstract variable or function prototype, i.e., there is no
2733	// identifier to which the type applies, e.g.:
2734	//
2735	// int f( int ); // not handled here
2736	// int f( int * ); // abstract function-prototype parameter; no parameter name specified
2737	// int f( int (*)() ); // abstract function-prototype parameter; no parameter name specified
2738	// int f( int (int) ); // abstract function-prototype parameter; no parameter name specified
2739	//
2740	// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
2741	// and functions versus pointers to arrays and functions. In addition, the pattern handles the
2742	// special meaning of parenthesis around a typedef name:
2743	//
2744	// ISO/IEC 9899:1999 Section 6.7.5.3(11) : "In a parameter declaration, a single typedef name in
2745	// parentheses is taken to be an abstract declarator that specifies a function with a single parameter,
2746	// not as redundant parentheses around the identifier."
2747	//
2748	// For example:
2749	//
2750	// typedef float T;
2751	// int f( int ( T [5] ) ); // see abstract_parameter_declarator
2752	// int g( int ( T ( int ) ) ); // see abstract_parameter_declarator
2753	// int f( int f1( T a[5] ) ); // see identifier_parameter_declarator
2754	// int g( int g1( T g2( int p ) ) ); // see identifier_parameter_declarator
2755	//
2756	// In essence, a '(' immediately to the left of typedef name, T, is interpreted as starting a parameter type list, and
2757	// not as redundant parentheses around a redeclaration of T. Finally, the pattern also precludes declaring an array of
2758	// functions versus a pointer to an array of functions, and returning arrays and functions versus pointers to arrays and
2759	// functions.
2760
2761	abstract_parameter_declarator:
2762	abstract_parameter_ptr
2763	\| abstract_parameter_array attribute_list_opt
2764	{ $$ = $1->addQualifiers( $2 ); }
2765	\| abstract_parameter_function attribute_list_opt
2766	{ $$ = $1->addQualifiers( $2 ); }
2767	;
2768
2769	abstract_parameter_ptr:
2770	ptrref_operator
2771	{ $$ = DeclarationNode::newPointer( nullptr, $1 ); }
2772	\| ptrref_operator type_qualifier_list
2773	{ $$ = DeclarationNode::newPointer( $2, $1 ); }
2774	\| ptrref_operator abstract_parameter_declarator
2775	{ $$ = $2->addPointer( DeclarationNode::newPointer( nullptr, $1 ) ); }
2776	\| ptrref_operator type_qualifier_list abstract_parameter_declarator
2777	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
2778	\| '(' abstract_parameter_ptr ')' attribute_list_opt
2779	{ $$ = $2->addQualifiers( $4 ); }
2780	;
2781
2782	abstract_parameter_array:
2783	array_parameter_dimension
2784	\| '(' abstract_parameter_ptr ')' array_parameter_dimension
2785	{ $$ = $2->addArray( $4 ); }
2786	\| '(' abstract_parameter_array ')' multi_array_dimension // redundant parenthesis
2787	{ $$ = $2->addArray( $4 ); }
2788	\| '(' abstract_parameter_array ')' // redundant parenthesis
2789	{ $$ = $2; }
2790	;
2791
2792	abstract_parameter_function:
2793	'(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2794	{ $$ = DeclarationNode::newFunction( nullptr, nullptr, $3, nullptr ); }
2795	\| '(' abstract_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2796	{ $$ = $2->addParamList( $6 ); }
2797	\| '(' abstract_parameter_function ')' // redundant parenthesis
2798	{ $$ = $2; }
2799	;
2800
2801	array_parameter_dimension:
2802	// Only the first dimension can be empty or have qualifiers.
2803	array_parameter_1st_dimension
2804	\| array_parameter_1st_dimension multi_array_dimension
2805	{ $$ = $1->addArray( $2 ); }
2806	\| multi_array_dimension
2807	;
2808
2809	// The declaration of an array parameter has additional syntax over arrays in normal variable declarations:
2810	//
2811	// ISO/IEC 9899:1999 Section 6.7.5.2(1) : "The optional type qualifiers and the keyword static shall appear only in
2812	// a declaration of a function parameter with an array type, and then only in the outermost array type derivation."
2813
2814	array_parameter_1st_dimension:
2815	'[' ']'
2816	{ $$ = DeclarationNode::newArray( 0, 0, false ); }
2817	// multi_array_dimension handles the '[' '*' ']' case
2818	\| '[' push type_qualifier_list '*' pop ']' // remaining C99
2819	{ $$ = DeclarationNode::newVarArray( $3 ); }
2820	\| '[' push type_qualifier_list pop ']'
2821	{ $$ = DeclarationNode::newArray( 0, $3, false ); }
2822	// multi_array_dimension handles the '[' assignment_expression ']' case
2823	\| '[' push type_qualifier_list assignment_expression pop ']'
2824	{ $$ = DeclarationNode::newArray( $4, $3, false ); }
2825	\| '[' push STATIC type_qualifier_list_opt assignment_expression pop ']'
2826	{ $$ = DeclarationNode::newArray( $5, $4, true ); }
2827	\| '[' push type_qualifier_list STATIC assignment_expression pop ']'
2828	{ $$ = DeclarationNode::newArray( $5, $3, true ); }
2829	;
2830
2831	// This pattern parses a declaration of an abstract variable, but does not allow "int ()" for a function pointer.
2832	//
2833	// struct S {
2834	// int;
2835	// int *;
2836	// int [10];
2837	// int (*)();
2838	// };
2839
2840	variable_abstract_declarator:
2841	variable_abstract_ptr
2842	\| variable_abstract_array attribute_list_opt
2843	{ $$ = $1->addQualifiers( $2 ); }
2844	\| variable_abstract_function attribute_list_opt
2845	{ $$ = $1->addQualifiers( $2 ); }
2846	;
2847
2848	variable_abstract_ptr:
2849	ptrref_operator
2850	{ $$ = DeclarationNode::newPointer( 0, $1 ); }
2851	\| ptrref_operator type_qualifier_list
2852	{ $$ = DeclarationNode::newPointer( $2, $1 ); }
2853	\| ptrref_operator variable_abstract_declarator
2854	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2855	\| ptrref_operator type_qualifier_list variable_abstract_declarator
2856	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2, $1 ) ); }
2857	\| '(' variable_abstract_ptr ')' attribute_list_opt
2858	{ $$ = $2->addQualifiers( $4 ); }
2859	;
2860
2861	variable_abstract_array:
2862	array_dimension
2863	\| '(' variable_abstract_ptr ')' array_dimension
2864	{ $$ = $2->addArray( $4 ); }
2865	\| '(' variable_abstract_array ')' multi_array_dimension // redundant parenthesis
2866	{ $$ = $2->addArray( $4 ); }
2867	\| '(' variable_abstract_array ')' // redundant parenthesis
2868	{ $$ = $2; }
2869	;
2870
2871	variable_abstract_function:
2872	'(' variable_abstract_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2873	{ $$ = $2->addParamList( $6 ); }
2874	\| '(' variable_abstract_function ')' // redundant parenthesis
2875	{ $$ = $2; }
2876	;
2877
2878	// This pattern parses a new-style declaration for a parameter variable or function prototype that is either an
2879	// identifier or typedef name and allows the C99 array options, which can only appear in a parameter list.
2880
2881	cfa_identifier_parameter_declarator_tuple: // CFA
2882	cfa_identifier_parameter_declarator_no_tuple
2883	\| cfa_abstract_tuple
2884	\| type_qualifier_list cfa_abstract_tuple
2885	{ $$ = $2->addQualifiers( $1 ); }
2886	;
2887
2888	cfa_identifier_parameter_declarator_no_tuple: // CFA
2889	cfa_identifier_parameter_ptr
2890	\| cfa_identifier_parameter_array
2891	;
2892
2893	cfa_identifier_parameter_ptr: // CFA
2894	// No SUE declaration in parameter list.
2895	ptrref_operator type_specifier_nobody
2896	{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2897	\| type_qualifier_list ptrref_operator type_specifier_nobody
2898	{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
2899	\| ptrref_operator cfa_abstract_function
2900	{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2901	\| type_qualifier_list ptrref_operator cfa_abstract_function
2902	{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
2903	\| ptrref_operator cfa_identifier_parameter_declarator_tuple
2904	{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2905	\| type_qualifier_list ptrref_operator cfa_identifier_parameter_declarator_tuple
2906	{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
2907	;
2908
2909	cfa_identifier_parameter_array: // CFA
2910	// Only the first dimension can be empty or have qualifiers. Empty dimension must be factored out due to
2911	// shift/reduce conflict with new-style empty (void) function return type.
2912	'[' ']' type_specifier_nobody
2913	{ $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
2914	\| cfa_array_parameter_1st_dimension type_specifier_nobody
2915	{ $$ = $2->addNewArray( $1 ); }
2916	\| '[' ']' multi_array_dimension type_specifier_nobody
2917	{ $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
2918	\| cfa_array_parameter_1st_dimension multi_array_dimension type_specifier_nobody
2919	{ $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
2920	\| multi_array_dimension type_specifier_nobody
2921	{ $$ = $2->addNewArray( $1 ); }
2922
2923	\| '[' ']' cfa_identifier_parameter_ptr
2924	{ $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
2925	\| cfa_array_parameter_1st_dimension cfa_identifier_parameter_ptr
2926	{ $$ = $2->addNewArray( $1 ); }
2927	\| '[' ']' multi_array_dimension cfa_identifier_parameter_ptr
2928	{ $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
2929	\| cfa_array_parameter_1st_dimension multi_array_dimension cfa_identifier_parameter_ptr
2930	{ $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
2931	\| multi_array_dimension cfa_identifier_parameter_ptr
2932	{ $$ = $2->addNewArray( $1 ); }
2933	;
2934
2935	cfa_array_parameter_1st_dimension:
2936	'[' push type_qualifier_list '*' pop ']' // remaining C99
2937	{ $$ = DeclarationNode::newVarArray( $3 ); }
2938	\| '[' push type_qualifier_list assignment_expression pop ']'
2939	{ $$ = DeclarationNode::newArray( $4, $3, false ); }
2940	\| '[' push declaration_qualifier_list assignment_expression pop ']'
2941	// declaration_qualifier_list must be used because of shift/reduce conflict with
2942	// assignment_expression, so a semantic check is necessary to preclude them as a type_qualifier cannot
2943	// appear in this context.
2944	{ $$ = DeclarationNode::newArray( $4, $3, true ); }
2945	\| '[' push declaration_qualifier_list type_qualifier_list assignment_expression pop ']'
2946	{ $$ = DeclarationNode::newArray( $5, $4->addQualifiers( $3 ), true ); }
2947	;
2948
2949	// This pattern parses a new-style declaration of an abstract variable or function prototype, i.e., there is no
2950	// identifier to which the type applies, e.g.:
2951	//
2952	// [int] f( int ); // abstract variable parameter; no parameter name specified
2953	// [int] f( [int] (int) ); // abstract function-prototype parameter; no parameter name specified
2954	//
2955	// These rules need LR(3):
2956	//
2957	// cfa_abstract_tuple identifier_or_type_name
2958	// '[' cfa_parameter_list ']' identifier_or_type_name '(' cfa_parameter_type_list_opt ')'
2959	//
2960	// since a function return type can be syntactically identical to a tuple type:
2961	//
2962	// [int, int] t;
2963	// [int, int] f( int );
2964	//
2965	// Therefore, it is necessary to look at the token after identifier_or_type_name to know when to reduce
2966	// cfa_abstract_tuple. To make this LR(1), several rules have to be flattened (lengthened) to allow the necessary
2967	// lookahead. To accomplish this, cfa_abstract_declarator has an entry point without tuple, and tuple declarations are
2968	// duplicated when appearing with cfa_function_specifier.
2969
2970	cfa_abstract_declarator_tuple: // CFA
2971	cfa_abstract_tuple
2972	\| type_qualifier_list cfa_abstract_tuple
2973	{ $$ = $2->addQualifiers( $1 ); }
2974	\| cfa_abstract_declarator_no_tuple
2975	;
2976
2977	cfa_abstract_declarator_no_tuple: // CFA
2978	cfa_abstract_ptr
2979	\| cfa_abstract_array
2980	;
2981
2982	cfa_abstract_ptr: // CFA
2983	ptrref_operator type_specifier
2984	{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2985	\| type_qualifier_list ptrref_operator type_specifier
2986	{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
2987	\| ptrref_operator cfa_abstract_function
2988	{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2989	\| type_qualifier_list ptrref_operator cfa_abstract_function
2990	{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
2991	\| ptrref_operator cfa_abstract_declarator_tuple
2992	{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0, $1 ) ); }
2993	\| type_qualifier_list ptrref_operator cfa_abstract_declarator_tuple
2994	{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1, $2 ) ); }
2995	;
2996
2997	cfa_abstract_array: // CFA
2998	// Only the first dimension can be empty. Empty dimension must be factored out due to shift/reduce conflict with
2999	// empty (void) function return type.
3000	'[' ']' type_specifier
3001	{ $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
3002	\| '[' ']' multi_array_dimension type_specifier
3003	{ $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
3004	\| multi_array_dimension type_specifier
3005	{ $$ = $2->addNewArray( $1 ); }
3006	\| '[' ']' cfa_abstract_ptr
3007	{ $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
3008	\| '[' ']' multi_array_dimension cfa_abstract_ptr
3009	{ $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
3010	\| multi_array_dimension cfa_abstract_ptr
3011	{ $$ = $2->addNewArray( $1 ); }
3012	;
3013
3014	cfa_abstract_tuple: // CFA
3015	'[' push cfa_abstract_parameter_list pop ']'
3016	{ $$ = DeclarationNode::newTuple( $3 ); }
3017	;
3018
3019	cfa_abstract_function: // CFA
3020	// '[' ']' '(' cfa_parameter_type_list_opt ')'
3021	// { $$ = DeclarationNode::newFunction( nullptr, DeclarationNode::newTuple( nullptr ), $4, nullptr ); }
3022	cfa_abstract_tuple '(' push cfa_parameter_type_list_opt pop ')'
3023	{ $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
3024	\| cfa_function_return '(' push cfa_parameter_type_list_opt pop ')'
3025	{ $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
3026	;
3027
3028	// 1) ISO/IEC 9899:1999 Section 6.7.2(2) : "At least one type specifier shall be given in the declaration specifiers in
3029	// each declaration, and in the specifier-qualifier list in each structure declaration and type name."
3030	//
3031	// 2) ISO/IEC 9899:1999 Section 6.11.5(1) : "The placement of a storage-class specifier other than at the beginning of
3032	// the declaration specifiers in a declaration is an obsolescent feature."
3033	//
3034	// 3) ISO/IEC 9899:1999 Section 6.11.6(1) : "The use of function declarators with empty parentheses (not
3035	// prototype-format parameter type declarators) is an obsolescent feature."
3036	//
3037	// 4) ISO/IEC 9899:1999 Section 6.11.7(1) : "The use of function definitions with separate parameter identifier and
3038	// declaration lists (not prototype-format parameter type and identifier declarators) is an obsolescent feature.
3039
3040	//*********************** MISCELLANEOUS ******************************
3041
3042	comma_opt: // redundant comma
3043	// empty
3044	\| ','
3045	;
3046
3047	assignment_opt:
3048	// empty
3049	{ $$ = nullptr; }
3050	\| '=' assignment_expression
3051	{ $$ = $2; }
3052	;
3053
3054	%%
3055	// ----end of grammar----
3056
3057	extern char *yytext;
3058
3059	void yyerror( const char * ) {
3060	cout << "Error ";
3061	if ( yyfilename ) {
3062	cout << "in file " << yyfilename << " ";
3063	} // if
3064	cout << "at line " << yylineno << " reading token \"" << (yytext[0] == '\0' ? "EOF" : yytext) << "\"" << endl;
3065	}
3066
3067	// Local Variables: //
3068	// mode: c++ //
3069	// tab-width: 4 //
3070	// compile-command: "make install" //
3071	// End: //

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