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parser.yy @ fe97a7d8

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Last change on this file since fe97a7d8 was dc2b4d6, checked in by Andrew Beach <ajbeach@…>, 7 years ago
Discused updates to handler predicate parsing.
Property mode set to `100644`
File size: 112.9 KB

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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 : Andrew Beach
12	// Last Modified On : Mon Jul 17 12:17:00 2017
13	// Update Count : 2455
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 EXPassign 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 exponential_expression multiplicative_expression additive_expression
171	%type<en> shift_expression relational_expression equality_expression
172	%type<en> AND_expression exclusive_OR_expression inclusive_OR_expression
173	%type<en> logical_AND_expression logical_OR_expression
174	%type<en> conditional_expression constant_expression assignment_expression assignment_expression_opt
175	%type<en> comma_expression comma_expression_opt
176	%type<en> argument_expression_list argument_expression default_initialize_opt
177	%type<fctl> for_control_expression
178	%type<en> subrange
179	%type<decl> asm_name_opt
180	%type<en> asm_operands_opt asm_operands_list asm_operand
181	%type<label> label_list
182	%type<en> asm_clobbers_list_opt
183	%type<flag> asm_volatile_opt
184
185	// statements
186	%type<sn> labeled_statement compound_statement expression_statement selection_statement
187	%type<sn> iteration_statement jump_statement
188	%type<sn> with_statement exception_statement asm_statement
189	%type<sn> fall_through_opt fall_through
190	%type<sn> statement statement_list
191	%type<sn> block_item_list block_item
192	%type<sn> with_clause_opt
193	%type<en> case_value
194	%type<sn> case_clause case_value_list case_label case_label_list
195	%type<sn> switch_clause_list_opt switch_clause_list choose_clause_list_opt choose_clause_list
196	%type<sn> /* handler_list */ handler_clause finally_clause
197	%type<catch_kind> handler_key
198
199	// declarations
200	%type<decl> abstract_declarator abstract_ptr abstract_array abstract_function array_dimension multi_array_dimension
201	%type<decl> abstract_parameter_declarator abstract_parameter_ptr abstract_parameter_array abstract_parameter_function array_parameter_dimension array_parameter_1st_dimension
202	%type<decl> abstract_parameter_declaration
203
204	%type<aggKey> aggregate_key
205	%type<decl> aggregate_type aggregate_type_nobody
206
207	%type<decl> assertion assertion_list_opt
208
209	%type<en> bit_subrange_size_opt bit_subrange_size
210
211	%type<decl> basic_declaration_specifier basic_type_name basic_type_specifier direct_type indirect_type
212
213	%type<decl> trait_declaration trait_declaration_list trait_declaring_list trait_specifier
214
215	%type<decl> declaration declaration_list declaration_list_opt declaration_qualifier_list
216	%type<decl> declaration_specifier declaration_specifier_nobody declarator declaring_list
217
218	%type<decl> elaborated_type elaborated_type_nobody
219
220	%type<decl> enumerator_list enum_type enum_type_nobody
221	%type<en> enumerator_value_opt
222
223	%type<decl> exception_declaration external_definition external_definition_list external_definition_list_opt
224
225	%type<decl> field_declaration field_declaration_list field_declarator field_declaring_list
226	%type<en> field field_list field_name fraction_constants
227
228	%type<decl> external_function_definition function_definition function_array function_declarator function_no_ptr function_ptr
229
230	%type<decl> identifier_parameter_declarator identifier_parameter_ptr identifier_parameter_array identifier_parameter_function
231	%type<decl> identifier_list
232
233	%type<decl> cfa_abstract_array cfa_abstract_declarator_no_tuple cfa_abstract_declarator_tuple
234	%type<decl> cfa_abstract_function cfa_abstract_parameter_declaration cfa_abstract_parameter_list
235	%type<decl> cfa_abstract_ptr cfa_abstract_tuple
236
237	%type<decl> cfa_array_parameter_1st_dimension
238
239	%type<decl> cfa_trait_declaring_list cfa_declaration cfa_field_declaring_list
240	%type<decl> cfa_function_declaration cfa_function_return cfa_function_specifier
241
242	%type<decl> cfa_identifier_parameter_array cfa_identifier_parameter_declarator_no_tuple
243	%type<decl> cfa_identifier_parameter_declarator_tuple cfa_identifier_parameter_ptr
244
245	%type<decl> cfa_parameter_declaration cfa_parameter_list cfa_parameter_type_list cfa_parameter_type_list_opt
246
247	%type<decl> cfa_typedef_declaration cfa_variable_declaration cfa_variable_specifier
248
249	%type<decl> c_declaration
250	%type<decl> KR_function_declarator KR_function_no_ptr KR_function_ptr KR_function_array
251	%type<decl> KR_declaration_list KR_declaration_list_opt
252
253	%type<decl> parameter_declaration parameter_list parameter_type_list
254	%type<decl> parameter_type_list_opt
255
256	%type<decl> paren_identifier paren_type
257
258	%type<decl> storage_class storage_class_list
259
260	%type<decl> sue_declaration_specifier sue_declaration_specifier_nobody sue_type_specifier sue_type_specifier_nobody
261
262	%type<tclass> type_class
263	%type<decl> type_declarator type_declarator_name type_declaring_list
264
265	%type<decl> type_declaration_specifier type_type_specifier type_name typegen_name
266	%type<decl> typedef typedef_declaration typedef_expression
267
268	%type<decl> variable_type_redeclarator type_ptr type_array type_function
269
270	%type<decl> type_parameter_redeclarator type_parameter_ptr type_parameter_array type_parameter_function
271
272	%type<decl> type type_no_function
273	%type<decl> type_parameter type_parameter_list type_initializer_opt
274
275	%type<en> type_list
276
277	%type<decl> type_qualifier type_qualifier_name type_qualifier_list_opt type_qualifier_list
278	%type<decl> type_specifier type_specifier_nobody
279
280	%type<decl> variable_declarator variable_ptr variable_array variable_function
281	%type<decl> variable_abstract_declarator variable_abstract_ptr variable_abstract_array variable_abstract_function
282
283	%type<decl> attribute_list_opt attribute_list attribute_name_list attribute attribute_name
284
285	// initializers
286	%type<in> initializer initializer_list initializer_opt
287
288	// designators
289	%type<en> designator designator_list designation
290
291
292	// Handle single shift/reduce conflict for dangling else by shifting the ELSE token. For example, this string
293	// is ambiguous:
294	// .---------. matches IF '(' comma_expression ')' statement
295	// if ( C ) S1 else S2
296	// `-----------------' matches IF '(' comma_expression ')' statement ELSE statement */
297
298	%nonassoc THEN // rule precedence for IF '(' comma_expression ')' statement
299	%nonassoc ELSE // token precedence for start of else clause in IF statement
300
301	%start translation_unit // parse-tree root
302
303	%%
304	//*********************** Namespace Management ******************************
305
306	// The grammar in the ANSI C standard is not strictly context-free, since it relies upon the distinct terminal symbols
307	// "identifier" and "TYPEDEFname" that are lexically identical. While it is possible to write a purely context-free
308	// grammar, such a grammar would obscure the relationship between syntactic and semantic constructs. Hence, this
309	// grammar uses the ANSI style.
310	//
311	// Cforall compounds this problem by introducing type names local to the scope of a declaration (for instance, those
312	// introduced through "forall" qualifiers), and by introducing "type generators" -- parameterized types. This latter
313	// type name creates a third class of identifiers that must be distinguished by the scanner.
314	//
315	// Since the scanner cannot distinguish among the different classes of identifiers without some context information, it
316	// accesses a data structure (TypedefTable) to allow classification of an identifier that it has just read. Semantic
317	// actions during the parser update this data structure when the class of identifiers change.
318	//
319	// Because the Cforall language is block-scoped, there is the possibility that an identifier can change its class in a
320	// local scope; it must revert to its original class at the end of the block. Since type names can be local to a
321	// particular declaration, each declaration is itself a scope. This requires distinguishing between type names that are
322	// local to the current declaration scope and those that persist past the end of the declaration (i.e., names defined in
323	// "typedef" or "otype" declarations).
324	//
325	// The non-terminals "push" and "pop" derive the empty string; their only use is to denote the opening and closing of
326	// scopes. Every push must have a matching pop, although it is regrettable the matching pairs do not always occur
327	// within the same rule. These non-terminals may appear in more contexts than strictly necessary from a semantic point
328	// of view. Unfortunately, these extra rules are necessary to prevent parsing conflicts -- the parser may not have
329	// enough context and look-ahead information to decide whether a new scope is necessary, so the effect of these extra
330	// rules is to open a new scope unconditionally. As the grammar evolves, it may be neccesary to add or move around
331	// "push" and "pop" nonterminals to resolve conflicts of this sort.
332
333	push:
334	{ typedefTable.enterScope(); }
335	;
336
337	pop:
338	{ typedefTable.leaveScope(); }
339	;
340
341	//*********************** CONSTANTS ******************************
342
343	constant:
344	// ENUMERATIONconstant is not included here; it is treated as a variable with type "enumeration constant".
345	INTEGERconstant { $$ = new ExpressionNode( build_constantInteger( *$1 ) ); }
346	\| REALDECIMALconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); }
347	\| REALFRACTIONconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); }
348	\| FLOATINGconstant { $$ = new ExpressionNode( build_constantFloat( *$1 ) ); }
349	\| CHARACTERconstant { $$ = new ExpressionNode( build_constantChar( *$1 ) ); }
350	;
351
352	identifier:
353	IDENTIFIER
354	\| ATTR_IDENTIFIER // CFA
355	;
356
357	no_attr_identifier:
358	IDENTIFIER
359	;
360
361	zero_one: // CFA
362	ZERO
363	\| ONE
364	;
365
366	string_literal:
367	string_literal_list { $$ = build_constantStr( *$1 ); }
368	;
369
370	string_literal_list: // juxtaposed strings are concatenated
371	STRINGliteral { $$ = $1; } // conversion from tok to str
372	\| string_literal_list STRINGliteral
373	{
374	appendStr( $1, $2 ); // append 2nd juxtaposed string to 1st
375	delete $2; // allocated by lexer
376	$$ = $1; // conversion from tok to str
377	}
378	;
379
380	//*********************** EXPRESSIONS ******************************
381
382	primary_expression:
383	IDENTIFIER // typedef name cannot be used as a variable name
384	{ $$ = new ExpressionNode( build_varref( $1 ) ); }
385	\| zero_one
386	{ $$ = new ExpressionNode( build_constantZeroOne( *$1 ) ); }
387	\| tuple
388	\| '(' comma_expression ')'
389	{ $$ = $2; }
390	\| '(' compound_statement ')' // GCC, lambda expression
391	{ $$ = new ExpressionNode( build_valexpr( $2 ) ); }
392	\| primary_expression '{' argument_expression_list '}' // CFA, constructor call
393	{
394	Token fn;
395	fn.str = new std::string( "?{}" ); // location undefined - use location of '{'?
396	$$ = new ExpressionNode( new ConstructorExpr( build_func( new ExpressionNode( build_varref( fn ) ), (ExpressionNode *)( $1 )->set_last( $3 ) ) ) );
397	}
398	\| type_name '.' no_attr_identifier // CFA, nested type
399	{ $$ = nullptr; } // FIX ME
400	\| type_name '.' '[' push field_list pop ']' // CFA, nested type / tuple field selector
401	{ $$ = nullptr; } // FIX ME
402	;
403
404	postfix_expression:
405	primary_expression
406	\| postfix_expression '[' push assignment_expression pop ']'
407	// CFA, comma_expression disallowed in this context because it results in a common user error: subscripting a
408	// matrix with x[i,j] instead of x[i][j]. While this change is not backwards compatible, there seems to be
409	// little advantage to this feature and many disadvantages. It is possible to write x[(i,j)] in CFA, which is
410	// equivalent to the old x[i,j].
411	{ $$ = new ExpressionNode( build_binary_val( OperKinds::Index, $1, $4 ) ); }
412	\| postfix_expression '(' argument_expression_list ')'
413	{ $$ = new ExpressionNode( build_func( $1, $3 ) ); }
414	\| postfix_expression '.' no_attr_identifier
415	{ $$ = new ExpressionNode( build_fieldSel( $1, build_varref( $3 ) ) ); }
416	\| postfix_expression '.' '[' push field_list pop ']' // CFA, tuple field selector
417	{ $$ = new ExpressionNode( build_fieldSel( $1, build_tuple( $5 ) ) ); }
418	\| postfix_expression REALFRACTIONconstant // CFA, tuple index
419	{ $$ = new ExpressionNode( build_fieldSel( $1, build_field_name_REALFRACTIONconstant( *$2 ) ) ); }
420	\| postfix_expression ARROW no_attr_identifier
421	{
422	$$ = new ExpressionNode( build_pfieldSel( $1, $3 == "0" \|\| $3 == "1" ? build_constantInteger( *$3 ) : build_varref( $3 ) ) );
423	}
424	\| postfix_expression ARROW '[' push field_list pop ']' // CFA, tuple field selector
425	{ $$ = new ExpressionNode( build_pfieldSel( $1, build_tuple( $5 ) ) ); }
426	\| postfix_expression ARROW INTEGERconstant // CFA, tuple index
427	{ $$ = new ExpressionNode( build_pfieldSel( $1, build_constantInteger( *$3 ) ) ); }
428	\| postfix_expression ICR
429	{ $$ = new ExpressionNode( build_unary_ptr( OperKinds::IncrPost, $1 ) ); }
430	\| postfix_expression DECR
431	{ $$ = new ExpressionNode( build_unary_ptr( OperKinds::DecrPost, $1 ) ); }
432	\| '(' type_no_function ')' '{' initializer_list comma_opt '}' // C99, compound-literal
433	{ $$ = new ExpressionNode( build_compoundLiteral( $2, new InitializerNode( $5, true ) ) ); }
434	\| '^' primary_expression '{' argument_expression_list '}' // CFA
435	{
436	Token fn;
437	fn.str = new string( "^?{}" ); // location undefined
438	$$ = new ExpressionNode( build_func( new ExpressionNode( build_varref( fn ) ), (ExpressionNode *)( $2 )->set_last( $4 ) ) );
439	}
440	;
441
442	argument_expression_list:
443	argument_expression
444	\| argument_expression_list ',' argument_expression
445	{ $$ = (ExpressionNode *)( $1->set_last( $3 )); }
446	;
447
448	argument_expression:
449	// empty
450	{ $$ = nullptr; }
451	// \| '@' // use default argument
452	// { $$ = new ExpressionNode( build_constantInteger( *new string( "2" ) ) ); }
453	\| assignment_expression
454	;
455
456	field_list: // CFA, tuple field selector
457	field
458	\| field_list ',' field { $$ = (ExpressionNode *)$1->set_last( $3 ); }
459	;
460
461	field: // CFA, tuple field selector
462	field_name
463	\| REALDECIMALconstant field
464	{ $$ = new ExpressionNode( build_fieldSel( new ExpressionNode( build_field_name_REALDECIMALconstant( *$1 ) ), maybeMoveBuild<Expression>( $2 ) ) ); }
465	\| REALDECIMALconstant '[' push field_list pop ']'
466	{ $$ = new ExpressionNode( build_fieldSel( new ExpressionNode( build_field_name_REALDECIMALconstant( *$1 ) ), build_tuple( $4 ) ) ); }
467	\| field_name '.' field
468	{ $$ = new ExpressionNode( build_fieldSel( $1, maybeMoveBuild<Expression>( $3 ) ) ); }
469	\| field_name '.' '[' push field_list pop ']'
470	{ $$ = new ExpressionNode( build_fieldSel( $1, build_tuple( $5 ) ) ); }
471	\| field_name ARROW field
472	{ $$ = new ExpressionNode( build_pfieldSel( $1, maybeMoveBuild<Expression>( $3 ) ) ); }
473	\| field_name ARROW '[' push field_list pop ']'
474	{ $$ = new ExpressionNode( build_pfieldSel( $1, build_tuple( $5 ) ) ); }
475	;
476
477	field_name:
478	INTEGERconstant fraction_constants
479	{ $$ = new ExpressionNode( build_field_name_fraction_constants( build_constantInteger( *$1 ), $2 ) ); }
480	\| FLOATINGconstant fraction_constants
481	{ $$ = new ExpressionNode( build_field_name_fraction_constants( build_field_name_FLOATINGconstant( *$1 ), $2 ) ); }
482	\| no_attr_identifier fraction_constants
483	{
484	$$ = new ExpressionNode( build_field_name_fraction_constants( build_varref( $1 ), $2 ) );
485	}
486	\| zero_one fraction_constants
487	{
488	$$ = new ExpressionNode( build_field_name_fraction_constants( build_constantZeroOne( *$1 ), $2 ) );
489	}
490	;
491
492	fraction_constants:
493	// empty
494	{ $$ = nullptr; }
495	\| fraction_constants REALFRACTIONconstant
496	{
497	Expression * constant = build_field_name_REALFRACTIONconstant( *$2 );
498	$$ = $1 != nullptr ? new ExpressionNode( build_fieldSel( $1, constant ) ) : new ExpressionNode( constant );
499	}
500	;
501
502	unary_expression:
503	postfix_expression
504	// first location where constant/string can have operator applied: sizeof 3/sizeof "abc" still requires
505	// semantics checks, e.g., ++3, 3--, *3, &&3
506	\| constant
507	{ $$ = $1; }
508	\| string_literal
509	{ $$ = new ExpressionNode( $1 ); }
510	\| EXTENSION cast_expression // GCC
511	{ $$ = $2->set_extension( true ); }
512	// '*' ('&') is separated from unary_operator because of shift/reduce conflict in:
513	// { * X; } // dereference X
514	// { * int X; } // CFA declaration of pointer to int
515	\| ptrref_operator cast_expression // CFA
516	{
517	switch ( $1 ) {
518	case OperKinds::AddressOf:
519	$$ = new ExpressionNode( build_addressOf( $2 ) );
520	break;
521	case OperKinds::PointTo:
522	$$ = new ExpressionNode( build_unary_val( $1, $2 ) );
523	break;
524	default:
525	assert( false );
526	}
527	}
528	\| unary_operator cast_expression
529	{ $$ = new ExpressionNode( build_unary_val( $1, $2 ) ); }
530	\| ICR unary_expression
531	{ $$ = new ExpressionNode( build_unary_ptr( OperKinds::Incr, $2 ) ); }
532	\| DECR unary_expression
533	{ $$ = new ExpressionNode( build_unary_ptr( OperKinds::Decr, $2 ) ); }
534	\| SIZEOF unary_expression
535	{ $$ = new ExpressionNode( build_sizeOfexpr( $2 ) ); }
536	\| SIZEOF '(' type_no_function ')'
537	{ $$ = new ExpressionNode( build_sizeOftype( $3 ) ); }
538	\| ALIGNOF unary_expression // GCC, variable alignment
539	{ $$ = new ExpressionNode( build_alignOfexpr( $2 ) ); }
540	\| ALIGNOF '(' type_no_function ')' // GCC, type alignment
541	{ $$ = new ExpressionNode( build_alignOftype( $3 ) ); }
542	\| OFFSETOF '(' type_no_function ',' no_attr_identifier ')'
543	{ $$ = new ExpressionNode( build_offsetOf( $3, build_varref( $5 ) ) ); }
544	\| ATTR_IDENTIFIER
545	{ $$ = new ExpressionNode( build_attrexpr( build_varref( $1 ), nullptr ) ); }
546	\| ATTR_IDENTIFIER '(' argument_expression ')'
547	{ $$ = new ExpressionNode( build_attrexpr( build_varref( $1 ), $3 ) ); }
548	\| ATTR_IDENTIFIER '(' type ')'
549	{ $$ = new ExpressionNode( build_attrtype( build_varref( $1 ), $3 ) ); }
550	// \| ANDAND IDENTIFIER // GCC, address of label
551	// { $$ = new ExpressionNode( new OperatorNode( OperKinds::LabelAddress ), new ExpressionNode( build_varref( $2 ) ); }
552	;
553
554	ptrref_operator:
555	'*' { $$ = OperKinds::PointTo; }
556	\| '&' { $$ = OperKinds::AddressOf; }
557	// GCC, address of label must be handled by semantic check for ref,ref,label
558	// \| ANDAND { $$ = OperKinds::And; }
559	;
560
561	unary_operator:
562	'+' { $$ = OperKinds::UnPlus; }
563	\| '-' { $$ = OperKinds::UnMinus; }
564	\| '!' { $$ = OperKinds::Neg; }
565	\| '~' { $$ = OperKinds::BitNeg; }
566	;
567
568	cast_expression:
569	unary_expression
570	\| '(' type_no_function ')' cast_expression
571	{ $$ = new ExpressionNode( build_cast( $2, $4 ) ); }
572	// \| '(' type_no_function ')' tuple
573	// { $$ = new ExpressionNode( build_cast( $2, $4 ) ); }
574	;
575
576	exponential_expression:
577	cast_expression
578	\| exponential_expression '\\' cast_expression
579	{ $$ = new ExpressionNode( build_binary_val( OperKinds::Exp, $1, $3 ) ); }
580	;
581
582	multiplicative_expression:
583	exponential_expression
584	\| multiplicative_expression '*' exponential_expression
585	{ $$ = new ExpressionNode( build_binary_val( OperKinds::Mul, $1, $3 ) ); }
586	\| multiplicative_expression '/' exponential_expression
587	{ $$ = new ExpressionNode( build_binary_val( OperKinds::Div, $1, $3 ) ); }
588	\| multiplicative_expression '%' exponential_expression
589	{ $$ = new ExpressionNode( build_binary_val( OperKinds::Mod, $1, $3 ) ); }
590	;
591
592	additive_expression:
593	multiplicative_expression
594	\| additive_expression '+' multiplicative_expression
595	{ $$ = new ExpressionNode( build_binary_val( OperKinds::Plus, $1, $3 ) ); }
596	\| additive_expression '-' multiplicative_expression
597	{ $$ = new ExpressionNode( build_binary_val( OperKinds::Minus, $1, $3 ) ); }
598	;
599
600	shift_expression:
601	additive_expression
602	\| shift_expression LS additive_expression
603	{ $$ = new ExpressionNode( build_binary_val( OperKinds::LShift, $1, $3 ) ); }
604	\| shift_expression RS additive_expression
605	{ $$ = new ExpressionNode( build_binary_val( OperKinds::RShift, $1, $3 ) ); }
606	;
607
608	relational_expression:
609	shift_expression
610	\| relational_expression '<' shift_expression
611	{ $$ = new ExpressionNode( build_binary_val( OperKinds::LThan, $1, $3 ) ); }
612	\| relational_expression '>' shift_expression
613	{ $$ = new ExpressionNode( build_binary_val( OperKinds::GThan, $1, $3 ) ); }
614	\| relational_expression LE shift_expression
615	{ $$ = new ExpressionNode( build_binary_val( OperKinds::LEThan, $1, $3 ) ); }
616	\| relational_expression GE shift_expression
617	{ $$ = new ExpressionNode( build_binary_val( OperKinds::GEThan, $1, $3 ) ); }
618	;
619
620	equality_expression:
621	relational_expression
622	\| equality_expression EQ relational_expression
623	{ $$ = new ExpressionNode( build_binary_val( OperKinds::Eq, $1, $3 ) ); }
624	\| equality_expression NE relational_expression
625	{ $$ = new ExpressionNode( build_binary_val( OperKinds::Neq, $1, $3 ) ); }
626	;
627
628	AND_expression:
629	equality_expression
630	\| AND_expression '&' equality_expression
631	{ $$ = new ExpressionNode( build_binary_val( OperKinds::BitAnd, $1, $3 ) ); }
632	;
633
634	exclusive_OR_expression:
635	AND_expression
636	\| exclusive_OR_expression '^' AND_expression
637	{ $$ = new ExpressionNode( build_binary_val( OperKinds::Xor, $1, $3 ) ); }
638	;
639
640	inclusive_OR_expression:
641	exclusive_OR_expression
642	\| inclusive_OR_expression '\|' exclusive_OR_expression
643	{ $$ = new ExpressionNode( build_binary_val( OperKinds::BitOr, $1, $3 ) ); }
644	;
645
646	logical_AND_expression:
647	inclusive_OR_expression
648	\| logical_AND_expression ANDAND inclusive_OR_expression
649	{ $$ = new ExpressionNode( build_and_or( $1, $3, true ) ); }
650	;
651
652	logical_OR_expression:
653	logical_AND_expression
654	\| logical_OR_expression OROR logical_AND_expression
655	{ $$ = new ExpressionNode( build_and_or( $1, $3, false ) ); }
656	;
657
658	conditional_expression:
659	logical_OR_expression
660	\| logical_OR_expression '?' comma_expression ':' conditional_expression
661	{ $$ = new ExpressionNode( build_cond( $1, $3, $5 ) ); }
662	// FIX ME: this hack computes $1 twice
663	\| logical_OR_expression '?' /* empty */ ':' conditional_expression // GCC, omitted first operand
664	{ $$ = new ExpressionNode( build_cond( $1, $1, $4 ) ); }
665	;
666
667	constant_expression:
668	conditional_expression
669	;
670
671	assignment_expression:
672	// CFA, assignment is separated from assignment_operator to ensure no assignment operations for tuples
673	conditional_expression
674	\| unary_expression assignment_operator assignment_expression
675	{ $$ = new ExpressionNode( build_binary_ptr( $2, $1, $3 ) ); }
676	;
677
678	assignment_expression_opt:
679	// empty
680	{ $$ = nullptr; }
681	\| assignment_expression
682	;
683
684	assignment_operator:
685	'=' { $$ = OperKinds::Assign; }
686	\| ATassign { $$ = OperKinds::AtAssn; }
687	\| EXPassign { $$ = OperKinds::ExpAssn; }
688	\| MULTassign { $$ = OperKinds::MulAssn; }
689	\| DIVassign { $$ = OperKinds::DivAssn; }
690	\| MODassign { $$ = OperKinds::ModAssn; }
691	\| PLUSassign { $$ = OperKinds::PlusAssn; }
692	\| MINUSassign { $$ = OperKinds::MinusAssn; }
693	\| LSassign { $$ = OperKinds::LSAssn; }
694	\| RSassign { $$ = OperKinds::RSAssn; }
695	\| ANDassign { $$ = OperKinds::AndAssn; }
696	\| ERassign { $$ = OperKinds::ERAssn; }
697	\| ORassign { $$ = OperKinds::OrAssn; }
698	;
699
700	tuple: // CFA, tuple
701	// CFA, one assignment_expression is factored out of comma_expression to eliminate a shift/reduce conflict with
702	// comma_expression in cfa_identifier_parameter_array and cfa_abstract_array
703	// '[' ']'
704	// { $$ = new ExpressionNode( build_tuple() ); }
705	// '[' push assignment_expression pop ']'
706	// { $$ = new ExpressionNode( build_tuple( $3 ) ); }
707	'[' push ',' tuple_expression_list pop ']'
708	{ $$ = new ExpressionNode( build_tuple( (ExpressionNode *)(new ExpressionNode( nullptr ) )->set_last( $4 ) ) ); }
709	\| '[' push assignment_expression ',' tuple_expression_list pop ']'
710	{ $$ = new ExpressionNode( build_tuple( (ExpressionNode *)$3->set_last( $5 ) ) ); }
711	;
712
713	tuple_expression_list:
714	assignment_expression_opt
715	\| tuple_expression_list ',' assignment_expression_opt
716	{ $$ = (ExpressionNode *)$1->set_last( $3 ); }
717	;
718
719	comma_expression:
720	assignment_expression
721	\| comma_expression ',' assignment_expression
722	{ $$ = new ExpressionNode( build_comma( $1, $3 ) ); }
723	;
724
725	comma_expression_opt:
726	// empty
727	{ $$ = nullptr; }
728	\| comma_expression
729	;
730
731	//************************* STATEMENTS *****************************
732
733	statement:
734	labeled_statement
735	\| compound_statement
736	\| expression_statement { $$ = $1; }
737	\| selection_statement
738	\| iteration_statement
739	\| jump_statement
740	\| with_statement
741	\| exception_statement
742	\| asm_statement
743
744	labeled_statement:
745	// labels cannot be identifiers 0 or 1 or ATTR_IDENTIFIER
746	identifier_or_type_name ':' attribute_list_opt statement
747	{
748	$$ = $4->add_label( $1, $3 );
749	}
750	;
751
752	compound_statement:
753	'{' '}'
754	{ $$ = new StatementNode( build_compound( (StatementNode *)0 ) ); }
755	\| '{'
756	// Two scopes are necessary because the block itself has a scope, but every declaration within the block also
757	// requires its own scope.
758	push push
759	local_label_declaration_opt // GCC, local labels
760	block_item_list // C99, intermix declarations and statements
761	pop '}'
762	{ $$ = new StatementNode( build_compound( $5 ) ); }
763	;
764
765	block_item_list: // C99
766	block_item
767	\| block_item_list push block_item
768	{ if ( $1 != 0 ) { $1->set_last( $3 ); $$ = $1; } }
769	;
770
771	block_item:
772	declaration // CFA, new & old style declarations
773	{ $$ = new StatementNode( $1 ); }
774	\| EXTENSION declaration // GCC
775	{
776	distExt( $2 );
777	$$ = new StatementNode( $2 );
778	}
779	\| function_definition
780	{ $$ = new StatementNode( $1 ); }
781	\| EXTENSION function_definition // GCC
782	{
783	distExt( $2 );
784	$$ = new StatementNode( $2 );
785	}
786	\| statement pop
787	;
788
789	statement_list:
790	statement
791	\| statement_list statement
792	{ if ( $1 != 0 ) { $1->set_last( $2 ); $$ = $1; } }
793	;
794
795	expression_statement:
796	comma_expression_opt ';'
797	{ $$ = new StatementNode( build_expr( $1 ) ); }
798	;
799
800	selection_statement:
801	IF '(' comma_expression ')' statement %prec THEN
802	// explicitly deal with the shift/reduce conflict on if/else
803	{ $$ = new StatementNode( build_if( $3, $5, nullptr ) ); }
804	\| IF '(' comma_expression ')' statement ELSE statement
805	{ $$ = new StatementNode( build_if( $3, $5, $7 ) ); }
806	\| SWITCH '(' comma_expression ')' case_clause // CFA
807	{ $$ = new StatementNode( build_switch( $3, $5 ) ); }
808	\| SWITCH '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt '}' // CFA
809	{
810	StatementNode *sw = new StatementNode( build_switch( $3, $8 ) );
811	// The semantics of the declaration list is changed to include associated initialization, which is performed
812	// before the transfer to the appropriate case clause by hoisting the declarations into a compound
813	// statement around the switch. Statements after the initial declaration list can never be executed, and
814	// therefore, are removed from the grammar even though C allows it. The change also applies to choose
815	// statement.
816	$$ = $7 ? new StatementNode( build_compound( (StatementNode *)((new StatementNode( $7 ))->set_last( sw )) ) ) : sw;
817	}
818	\| CHOOSE '(' comma_expression ')' case_clause // CFA
819	{ $$ = new StatementNode( build_switch( $3, $5 ) ); }
820	\| CHOOSE '(' comma_expression ')' '{' push declaration_list_opt choose_clause_list_opt '}' // CFA
821	{
822	StatementNode *sw = new StatementNode( build_switch( $3, $8 ) );
823	$$ = $7 ? new StatementNode( build_compound( (StatementNode *)((new StatementNode( $7 ))->set_last( sw )) ) ) : sw;
824	}
825	;
826
827	// CASE and DEFAULT clauses are only allowed in the SWITCH statement, precluding Duff's device. In addition, a case
828	// clause allows a list of values and subranges.
829
830	case_value: // CFA
831	constant_expression { $$ = $1; }
832	\| constant_expression ELLIPSIS constant_expression // GCC, subrange
833	{ $$ = new ExpressionNode( build_range( $1, $3 ) ); }
834	\| subrange // CFA, subrange
835	;
836
837	case_value_list: // CFA
838	case_value { $$ = new StatementNode( build_case( $1 ) ); }
839	// convert case list, e.g., "case 1, 3, 5:" into "case 1: case 3: case 5"
840	\| case_value_list ',' case_value { $$ = (StatementNode *)($1->set_last( new StatementNode( build_case( $3 ) ) ) ); }
841	;
842
843	case_label: // CFA
844	CASE case_value_list ':' { $$ = $2; }
845	\| DEFAULT ':' { $$ = new StatementNode( build_default() ); }
846	// A semantic check is required to ensure only one default clause per switch/choose statement.
847	;
848
849	case_label_list: // CFA
850	case_label
851	\| case_label_list case_label { $$ = (StatementNode *)( $1->set_last( $2 )); }
852	;
853
854	case_clause: // CFA
855	case_label_list statement { $$ = $1->append_last_case( new StatementNode( build_compound( $2 ) ) ); }
856	;
857
858	switch_clause_list_opt: // CFA
859	// empty
860	{ $$ = nullptr; }
861	\| switch_clause_list
862	;
863
864	switch_clause_list: // CFA
865	case_label_list statement_list
866	{ $$ = $1->append_last_case( new StatementNode( build_compound( $2 ) ) ); }
867	\| switch_clause_list case_label_list statement_list
868	{ $$ = (StatementNode *)( $1->set_last( $2->append_last_case( new StatementNode( build_compound( $3 ) ) ) ) ); }
869	;
870
871	choose_clause_list_opt: // CFA
872	// empty
873	{ $$ = nullptr; }
874	\| choose_clause_list
875	;
876
877	choose_clause_list: // CFA
878	case_label_list fall_through
879	{ $$ = $1->append_last_case( $2 ); }
880	\| case_label_list statement_list fall_through_opt
881	{ $$ = $1->append_last_case( new StatementNode( build_compound( (StatementNode *)$2->set_last( $3 ) ) ) ); }
882	\| choose_clause_list case_label_list fall_through
883	{ $$ = (StatementNode *)( $1->set_last( $2->append_last_case( $3 ))); }
884	\| choose_clause_list case_label_list statement_list fall_through_opt
885	{ $$ = (StatementNode )( $1->set_last( $2->append_last_case( new StatementNode( build_compound( (StatementNode )$3->set_last( $4 ) ) ) ) ) ); }
886	;
887
888	fall_through_opt: // CFA
889	// empty
890	{ $$ = new StatementNode( build_branch( BranchStmt::Break ) ); } // insert implicit break
891	\| fall_through
892	;
893
894	fall_through: // CFA
895	FALLTHRU
896	{ $$ = nullptr; }
897	\| FALLTHRU ';'
898	{ $$ = nullptr; }
899	;
900
901	iteration_statement:
902	WHILE '(' comma_expression ')' statement
903	{ $$ = new StatementNode( build_while( $3, $5 ) ); }
904	\| DO statement WHILE '(' comma_expression ')' ';'
905	{ $$ = new StatementNode( build_while( $5, $2, true ) ); }
906	\| FOR '(' push for_control_expression ')' statement
907	{ $$ = new StatementNode( build_for( $4, $6 ) ); }
908	;
909
910	for_control_expression:
911	comma_expression_opt pop ';' comma_expression_opt ';' comma_expression_opt
912	{ $$ = new ForCtl( $1, $4, $6 ); }
913	\| declaration comma_expression_opt ';' comma_expression_opt // C99
914	{ $$ = new ForCtl( $1, $2, $4 ); }
915	;
916
917	jump_statement:
918	GOTO identifier_or_type_name ';'
919	{ $$ = new StatementNode( build_branch( $2, BranchStmt::Goto ) ); }
920	\| GOTO '*' comma_expression ';' // GCC, computed goto
921	// The syntax for the GCC computed goto violates normal expression precedence, e.g., goto i+3; => goto (i+3);
922	// whereas normal operator precedence yields goto (*i)+3;
923	{ $$ = new StatementNode( build_computedgoto( $3 ) ); }
924	\| CONTINUE ';'
925	// A semantic check is required to ensure this statement appears only in the body of an iteration statement.
926	{ $$ = new StatementNode( build_branch( BranchStmt::Continue ) ); }
927	\| CONTINUE identifier_or_type_name ';' // CFA, multi-level continue
928	// A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
929	// the target of the transfer appears only at the start of an iteration statement.
930	{ $$ = new StatementNode( build_branch( $2, BranchStmt::Continue ) ); }
931	\| BREAK ';'
932	// A semantic check is required to ensure this statement appears only in the body of an iteration statement.
933	{ $$ = new StatementNode( build_branch( BranchStmt::Break ) ); }
934	\| BREAK identifier_or_type_name ';' // CFA, multi-level exit
935	// A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
936	// the target of the transfer appears only at the start of an iteration statement.
937	{ $$ = new StatementNode( build_branch( $2, BranchStmt::Break ) ); }
938	\| RETURN comma_expression_opt ';'
939	{ $$ = new StatementNode( build_return( $2 ) ); }
940	\| THROW assignment_expression_opt ';' // handles rethrow
941	{ $$ = new StatementNode( build_throw( $2 ) ); }
942	\| THROWRESUME assignment_expression_opt ';' // handles reresume
943	{ $$ = new StatementNode( build_resume( $2 ) ); }
944	\| THROWRESUME assignment_expression_opt AT assignment_expression ';' // handles reresume
945	{ $$ = new StatementNode( build_resume_at( $2, $4 ) ); }
946	;
947
948	with_statement:
949	WITH '(' tuple_expression_list ')' compound_statement
950	{ $$ = (StatementNode *)0; } // FIX ME
951	;
952
953	exception_statement:
954	TRY compound_statement handler_clause
955	{ $$ = new StatementNode( build_try( $2, $3, 0 ) ); }
956	\| TRY compound_statement finally_clause
957	{ $$ = new StatementNode( build_try( $2, 0, $3 ) ); }
958	\| TRY compound_statement handler_clause finally_clause
959	{ $$ = new StatementNode( build_try( $2, $3, $4 ) ); }
960	;
961
962	//handler_list:
963	// handler_clause
964	// // ISO/IEC 9899:1999 Section 15.3(6 ) If present, a "..." handler shall be the last handler for its try block.
965	// \| CATCH '(' ELLIPSIS ')' compound_statement
966	// { $$ = new StatementNode( build_catch( 0, $5, true ) ); }
967	// \| handler_clause CATCH '(' ELLIPSIS ')' compound_statement
968	// { $$ = (StatementNode *)$1->set_last( new StatementNode( build_catch( 0, $6, true ) ) ); }
969	// \| CATCHRESUME '(' ELLIPSIS ')' compound_statement
970	// { $$ = new StatementNode( build_catch( 0, $5, true ) ); }
971	// \| handler_clause CATCHRESUME '(' ELLIPSIS ')' compound_statement
972	// { $$ = (StatementNode *)$1->set_last( new StatementNode( build_catch( 0, $6, true ) ) ); }
973	// ;
974
975	handler_clause:
976	// TEMPORARY, TEST EXCEPTIONS
977	handler_key '(' push push INTEGERconstant pop ')' compound_statement pop
978	{ $$ = new StatementNode( build_catch( $1, nullptr, new ExpressionNode( build_constantInteger( *$5 ) ), $8 ) ); }
979	\| handler_clause handler_key '(' push push INTEGERconstant pop ')' compound_statement pop
980	{ $$ = (StatementNode )$1->set_last( new StatementNode( build_catch( $2, nullptr, new ExpressionNode( build_constantInteger( $6 ) ), $9 ) ) ); }
981
982	\| handler_key '(' push push exception_declaration pop handler_predicate_opt ')' compound_statement pop
983	{ $$ = new StatementNode( build_catch( $1, $5, nullptr, $9 ) ); }
984	\| handler_clause handler_key '(' push push exception_declaration pop handler_predicate_opt ')' compound_statement pop
985	{ $$ = (StatementNode *)$1->set_last( new StatementNode( build_catch( $2, $6, nullptr, $10 ) ) ); }
986	;
987
988	handler_predicate_opt:
989	//empty
990	\| ';' conditional_expression
991	;
992
993	handler_key:
994	CATCH
995	{ $$ = CatchStmt::Terminate; }
996	\| CATCHRESUME
997	{ $$ = CatchStmt::Resume; }
998	;
999
1000	finally_clause:
1001	FINALLY compound_statement
1002	{
1003	$$ = new StatementNode( build_finally( $2 ) );
1004	}
1005	;
1006
1007	exception_declaration:
1008	// No SUE declaration in parameter list.
1009	type_specifier_nobody
1010	\| type_specifier_nobody declarator
1011	{
1012	typedefTable.addToEnclosingScope( TypedefTable::ID );
1013	$$ = $2->addType( $1 );
1014	}
1015	\| type_specifier_nobody variable_abstract_declarator
1016	{ $$ = $2->addType( $1 ); }
1017	\| cfa_abstract_declarator_tuple no_attr_identifier // CFA
1018	{
1019	typedefTable.addToEnclosingScope( TypedefTable::ID );
1020	$$ = $1->addName( $2 );
1021	}
1022	\| cfa_abstract_declarator_tuple // CFA
1023	;
1024
1025	asm_statement:
1026	ASM asm_volatile_opt '(' string_literal ')' ';'
1027	{ $$ = new StatementNode( build_asmstmt( $2, $4, 0 ) ); }
1028	\| ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ')' ';' // remaining GCC
1029	{ $$ = new StatementNode( build_asmstmt( $2, $4, $6 ) ); }
1030	\| ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ')' ';'
1031	{ $$ = new StatementNode( build_asmstmt( $2, $4, $6, $8 ) ); }
1032	\| ASM asm_volatile_opt '(' string_literal ':' asm_operands_opt ':' asm_operands_opt ':' asm_clobbers_list_opt ')' ';'
1033	{ $$ = new StatementNode( build_asmstmt( $2, $4, $6, $8, $10 ) ); }
1034	\| ASM asm_volatile_opt GOTO '(' string_literal ':' ':' asm_operands_opt ':' asm_clobbers_list_opt ':' label_list ')' ';'
1035	{ $$ = new StatementNode( build_asmstmt( $2, $5, 0, $8, $10, $12 ) ); }
1036	;
1037
1038	asm_volatile_opt: // GCC
1039	// empty
1040	{ $$ = false; }
1041	\| VOLATILE
1042	{ $$ = true; }
1043	;
1044
1045	asm_operands_opt: // GCC
1046	// empty
1047	{ $$ = nullptr; } // use default argument
1048	\| asm_operands_list
1049	;
1050
1051	asm_operands_list: // GCC
1052	asm_operand
1053	\| asm_operands_list ',' asm_operand
1054	{ $$ = (ExpressionNode *)$1->set_last( $3 ); }
1055	;
1056
1057	asm_operand: // GCC
1058	string_literal '(' constant_expression ')'
1059	{ $$ = new ExpressionNode( build_asmexpr( 0, $1, $3 ) ); }
1060	\| '[' constant_expression ']' string_literal '(' constant_expression ')'
1061	{ $$ = new ExpressionNode( build_asmexpr( $2, $4, $6 ) ); }
1062	;
1063
1064	asm_clobbers_list_opt: // GCC
1065	// empty
1066	{ $$ = nullptr; } // use default argument
1067	\| string_literal
1068	{ $$ = new ExpressionNode( $1 ); }
1069	\| asm_clobbers_list_opt ',' string_literal
1070	// set_last return ParseNode *
1071	{ $$ = (ExpressionNode *)$1->set_last( new ExpressionNode( $3 ) ); }
1072	;
1073
1074	label_list:
1075	no_attr_identifier
1076	{
1077	$$ = new LabelNode(); $$->labels.push_back( *$1 );
1078	delete $1; // allocated by lexer
1079	}
1080	\| label_list ',' no_attr_identifier
1081	{
1082	$$ = $1; $1->labels.push_back( *$3 );
1083	delete $3; // allocated by lexer
1084	}
1085	;
1086
1087	//***************************** DECLARATIONS *******************************
1088
1089	declaration_list_opt: // used at beginning of switch statement
1090	pop
1091	{ $$ = nullptr; }
1092	\| declaration_list
1093	;
1094
1095	declaration_list:
1096	declaration
1097	\| declaration_list push declaration
1098	{ $$ = $1->appendList( $3 ); }
1099	;
1100
1101	KR_declaration_list_opt: // used to declare parameter types in K&R style functions
1102	pop
1103	{ $$ = nullptr; }
1104	\| KR_declaration_list
1105	;
1106
1107	KR_declaration_list:
1108	c_declaration
1109	\| KR_declaration_list push c_declaration
1110	{ $$ = $1->appendList( $3 ); }
1111	;
1112
1113	local_label_declaration_opt: // GCC, local label
1114	// empty
1115	\| local_label_declaration_list
1116	;
1117
1118	local_label_declaration_list: // GCC, local label
1119	LABEL local_label_list ';'
1120	\| local_label_declaration_list LABEL local_label_list ';'
1121	;
1122
1123	local_label_list: // GCC, local label
1124	no_attr_identifier_or_type_name {}
1125	\| local_label_list ',' no_attr_identifier_or_type_name {}
1126	;
1127
1128	declaration: // CFA, new & old style declarations
1129	cfa_declaration
1130	\| c_declaration
1131	;
1132
1133	// C declaration syntax is notoriously confusing and error prone. Cforall provides its own type, variable and function
1134	// declarations. CFA declarations use the same declaration tokens as in C; however, CFA places declaration modifiers to
1135	// the left of the base type, while C declarations place modifiers to the right of the base type. CFA declaration
1136	// modifiers are interpreted from left to right and the entire type specification is distributed across all variables in
1137	// the declaration list (as in Pascal). ANSI C and the new CFA declarations may appear together in the same program
1138	// block, but cannot be mixed within a specific declaration.
1139	//
1140	// CFA C
1141	// [10] int x; int x[10]; // array of 10 integers
1142	// [10] * char y; char *y[10]; // array of 10 pointers to char
1143
1144	cfa_declaration: // CFA
1145	cfa_variable_declaration pop ';'
1146	\| cfa_typedef_declaration pop ';'
1147	\| cfa_function_declaration pop ';'
1148	\| type_declaring_list pop ';'
1149	\| trait_specifier pop ';'
1150	;
1151
1152	cfa_variable_declaration: // CFA
1153	cfa_variable_specifier initializer_opt
1154	{
1155	typedefTable.addToEnclosingScope( TypedefTable::ID );
1156	$$ = $1->addInitializer( $2 );
1157	}
1158	\| declaration_qualifier_list cfa_variable_specifier initializer_opt
1159	// declaration_qualifier_list also includes type_qualifier_list, so a semantic check is necessary to preclude
1160	// them as a type_qualifier cannot appear in that context.
1161	{
1162	typedefTable.addToEnclosingScope( TypedefTable::ID );
1163	$$ = $2->addQualifiers( $1 )->addInitializer( $3 );;
1164	}
1165	\| cfa_variable_declaration pop ',' push identifier_or_type_name initializer_opt
1166	{
1167	typedefTable.addToEnclosingScope( *$5, TypedefTable::ID );
1168	$$ = $1->appendList( $1->cloneType( $5 )->addInitializer( $6 ) );
1169	}
1170	;
1171
1172	cfa_variable_specifier: // CFA
1173	// A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
1174	// storage-class
1175	cfa_abstract_declarator_no_tuple identifier_or_type_name asm_name_opt
1176	{
1177	typedefTable.setNextIdentifier( *$2 );
1178	$$ = $1->addName( $2 )->addAsmName( $3 );
1179	}
1180	\| cfa_abstract_tuple identifier_or_type_name asm_name_opt
1181	{
1182	typedefTable.setNextIdentifier( *$2 );
1183	$$ = $1->addName( $2 )->addAsmName( $3 );
1184	}
1185	\| type_qualifier_list cfa_abstract_tuple identifier_or_type_name asm_name_opt
1186	{
1187	typedefTable.setNextIdentifier( *$3 );
1188	$$ = $2->addQualifiers( $1 )->addName( $3 )->addAsmName( $4 );
1189	}
1190	;
1191
1192	cfa_function_declaration: // CFA
1193	cfa_function_specifier
1194	{
1195	typedefTable.addToEnclosingScope( TypedefTable::ID );
1196	$$ = $1;
1197	}
1198	\| type_qualifier_list cfa_function_specifier
1199	{
1200	typedefTable.addToEnclosingScope( TypedefTable::ID );
1201	$$ = $2->addQualifiers( $1 );
1202	}
1203	\| declaration_qualifier_list cfa_function_specifier
1204	{
1205	typedefTable.addToEnclosingScope( TypedefTable::ID );
1206	$$ = $2->addQualifiers( $1 );
1207	}
1208	\| declaration_qualifier_list type_qualifier_list cfa_function_specifier
1209	{
1210	typedefTable.addToEnclosingScope( TypedefTable::ID );
1211	$$ = $3->addQualifiers( $1 )->addQualifiers( $2 );
1212	}
1213	\| cfa_function_declaration pop ',' push identifier_or_type_name
1214	{
1215	typedefTable.addToEnclosingScope( *$5, TypedefTable::ID );
1216	$$ = $1->appendList( $1->cloneType( $5 ) );
1217	}
1218	;
1219
1220	cfa_function_specifier: // CFA
1221	// '[' ']' identifier_or_type_name '(' push cfa_parameter_type_list_opt pop ')' // S/R conflict
1222	// {
1223	// $$ = DeclarationNode::newFunction( $3, DeclarationNode::newTuple( 0 ), $6, 0, true );
1224	// }
1225	// '[' ']' identifier '(' push cfa_parameter_type_list_opt pop ')'
1226	// {
1227	// typedefTable.setNextIdentifier( *$5 );
1228	// $$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, 0, true );
1229	// }
1230	// \| '[' ']' TYPEDEFname '(' push cfa_parameter_type_list_opt pop ')'
1231	// {
1232	// typedefTable.setNextIdentifier( *$5 );
1233	// $$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, 0, true );
1234	// }
1235	// \| '[' ']' typegen_name
1236	// identifier_or_type_name must be broken apart because of the sequence:
1237	//
1238	// '[' ']' identifier_or_type_name '(' cfa_parameter_type_list_opt ')'
1239	// '[' ']' type_specifier
1240	//
1241	// type_specifier can resolve to just TYPEDEFname (e.g., typedef int T; int f( T );). Therefore this must be
1242	// flattened to allow lookahead to the '(' without having to reduce identifier_or_type_name.
1243	cfa_abstract_tuple identifier_or_type_name '(' push cfa_parameter_type_list_opt pop ')'
1244	// To obtain LR(1 ), this rule must be factored out from function return type (see cfa_abstract_declarator).
1245	{
1246	$$ = DeclarationNode::newFunction( $2, $1, $5, 0, true );
1247	}
1248	\| cfa_function_return identifier_or_type_name '(' push cfa_parameter_type_list_opt pop ')'
1249	{
1250	$$ = DeclarationNode::newFunction( $2, $1, $5, 0, true );
1251	}
1252	;
1253
1254	cfa_function_return: // CFA
1255	'[' push cfa_parameter_list pop ']'
1256	{ $$ = DeclarationNode::newTuple( $3 ); }
1257	\| '[' push cfa_parameter_list pop ',' push cfa_abstract_parameter_list pop ']'
1258	// To obtain LR(1 ), the last cfa_abstract_parameter_list is added into this flattened rule to lookahead to the
1259	// ']'.
1260	{ $$ = DeclarationNode::newTuple( $3->appendList( $7 ) ); }
1261	;
1262
1263	cfa_typedef_declaration: // CFA
1264	TYPEDEF cfa_variable_specifier
1265	{
1266	typedefTable.addToEnclosingScope( TypedefTable::TD );
1267	$$ = $2->addTypedef();
1268	}
1269	\| TYPEDEF cfa_function_specifier
1270	{
1271	typedefTable.addToEnclosingScope( TypedefTable::TD );
1272	$$ = $2->addTypedef();
1273	}
1274	\| cfa_typedef_declaration pop ',' push no_attr_identifier
1275	{
1276	typedefTable.addToEnclosingScope( *$5, TypedefTable::TD );
1277	$$ = $1->appendList( $1->cloneType( $5 ) );
1278	}
1279	;
1280
1281	// Traditionally typedef is part of storage-class specifier for syntactic convenience only. Here, it is factored out as
1282	// a separate form of declaration, which syntactically precludes storage-class specifiers and initialization.
1283
1284	typedef_declaration:
1285	TYPEDEF type_specifier declarator
1286	{
1287	typedefTable.addToEnclosingScope( TypedefTable::TD );
1288	$$ = $3->addType( $2 )->addTypedef();
1289	}
1290	\| typedef_declaration pop ',' push declarator
1291	{
1292	typedefTable.addToEnclosingScope( TypedefTable::TD );
1293	$$ = $1->appendList( $1->cloneBaseType( $5 )->addTypedef() );
1294	}
1295	\| type_qualifier_list TYPEDEF type_specifier declarator // remaining OBSOLESCENT (see 2 )
1296	{
1297	typedefTable.addToEnclosingScope( TypedefTable::TD );
1298	$$ = $4->addType( $3 )->addQualifiers( $1 )->addTypedef();
1299	}
1300	\| type_specifier TYPEDEF declarator
1301	{
1302	typedefTable.addToEnclosingScope( TypedefTable::TD );
1303	$$ = $3->addType( $1 )->addTypedef();
1304	}
1305	\| type_specifier TYPEDEF type_qualifier_list declarator
1306	{
1307	typedefTable.addToEnclosingScope( TypedefTable::TD );
1308	$$ = $4->addQualifiers( $1 )->addTypedef()->addType( $1 );
1309	}
1310	;
1311
1312	typedef_expression:
1313	// GCC, naming expression type: typedef name = exp; gives a name to the type of an expression
1314	TYPEDEF no_attr_identifier '=' assignment_expression
1315	{
1316	typedefTable.addToEnclosingScope( *$2, TypedefTable::TD );
1317	$$ = DeclarationNode::newName( 0 ); // unimplemented
1318	}
1319	\| typedef_expression pop ',' push no_attr_identifier '=' assignment_expression
1320	{
1321	typedefTable.addToEnclosingScope( *$5, TypedefTable::TD );
1322	$$ = DeclarationNode::newName( 0 ); // unimplemented
1323	}
1324	;
1325
1326	//c_declaration:
1327	// declaring_list pop ';'
1328	// \| typedef_declaration pop ';'
1329	// \| typedef_expression pop ';' // GCC, naming expression type
1330	// \| sue_declaration_specifier pop ';'
1331	// ;
1332	//
1333	//declaring_list:
1334	// // A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
1335	// // storage-class
1336	// declarator asm_name_opt initializer_opt
1337	// {
1338	// typedefTable.addToEnclosingScope( TypedefTable::ID );
1339	// $$ = ( $2->addType( $1 ))->addAsmName( $3 )->addInitializer( $4 );
1340	// }
1341	// \| declaring_list ',' attribute_list_opt declarator asm_name_opt initializer_opt
1342	// {
1343	// typedefTable.addToEnclosingScope( TypedefTable::ID );
1344	// $$ = $1->appendList( $1->cloneBaseType( $4->addAsmName( $5 )->addInitializer( $6 ) ) );
1345	// }
1346	// ;
1347
1348	c_declaration:
1349	declaration_specifier declaring_list pop ';'
1350	{
1351	$$ = distAttr( $1, $2 );
1352	}
1353	\| typedef_declaration pop ';'
1354	\| typedef_expression pop ';' // GCC, naming expression type
1355	\| sue_declaration_specifier pop ';'
1356	;
1357
1358	declaring_list:
1359	// A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
1360	// storage-class
1361	declarator asm_name_opt initializer_opt
1362	{
1363	typedefTable.addToEnclosingScope( TypedefTable::ID );
1364	$$ = $1->addAsmName( $2 )->addInitializer( $3 );
1365	}
1366	\| declaring_list ',' attribute_list_opt declarator asm_name_opt initializer_opt
1367	{
1368	typedefTable.addToEnclosingScope( TypedefTable::ID );
1369	$$ = $1->appendList( $4->addQualifiers( $3 )->addAsmName( $5 )->addInitializer( $6 ) );
1370	}
1371	;
1372
1373	declaration_specifier: // type specifier + storage class
1374	basic_declaration_specifier
1375	\| sue_declaration_specifier
1376	\| type_declaration_specifier
1377	;
1378
1379	declaration_specifier_nobody: // type specifier + storage class - {...}
1380	// Preclude SUE declarations in restricted scopes:
1381	//
1382	// int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... }
1383	//
1384	// because it is impossible to call f due to name equivalence.
1385	basic_declaration_specifier
1386	\| sue_declaration_specifier_nobody
1387	\| type_declaration_specifier
1388	;
1389
1390	type_specifier: // type specifier
1391	basic_type_specifier
1392	\| sue_type_specifier
1393	\| type_type_specifier
1394	;
1395
1396	type_specifier_nobody: // type specifier - {...}
1397	// Preclude SUE declarations in restricted scopes:
1398	//
1399	// int f( struct S { int i; } s1, Struct S s2 ) { struct S s3; ... }
1400	//
1401	// because it is impossible to call f due to name equivalence.
1402	basic_type_specifier
1403	\| sue_type_specifier_nobody
1404	\| type_type_specifier
1405	;
1406
1407	type_qualifier_list_opt: // GCC, used in asm_statement
1408	// empty
1409	{ $$ = nullptr; }
1410	\| type_qualifier_list
1411	;
1412
1413	type_qualifier_list:
1414	// A semantic check is necessary to ensure a type qualifier is appropriate for the kind of declaration.
1415	//
1416	// ISO/IEC 9899:1999 Section 6.7.3(4 ) : If the same qualifier appears more than once in the same
1417	// specifier-qualifier-list, either directly or via one or more typedefs, the behavior is the same as if it
1418	// appeared only once.
1419	type_qualifier
1420	\| type_qualifier_list type_qualifier
1421	{ $$ = $1->addQualifiers( $2 ); }
1422	;
1423
1424	type_qualifier:
1425	type_qualifier_name
1426	\| attribute
1427	;
1428
1429	type_qualifier_name:
1430	CONST
1431	{ $$ = DeclarationNode::newTypeQualifier( Type::Const ); }
1432	\| RESTRICT
1433	{ $$ = DeclarationNode::newTypeQualifier( Type::Restrict ); }
1434	\| VOLATILE
1435	{ $$ = DeclarationNode::newTypeQualifier( Type::Volatile ); }
1436	\| LVALUE // CFA
1437	{ $$ = DeclarationNode::newTypeQualifier( Type::Lvalue ); }
1438	\| MUTEX
1439	{ $$ = DeclarationNode::newTypeQualifier( Type::Mutex ); }
1440	\| ATOMIC
1441	{ $$ = DeclarationNode::newTypeQualifier( Type::Atomic ); }
1442	\| FORALL '('
1443	{
1444	typedefTable.enterScope();
1445	}
1446	type_parameter_list ')' // CFA
1447	{
1448	typedefTable.leaveScope();
1449	$$ = DeclarationNode::newForall( $4 );
1450	}
1451	;
1452
1453	declaration_qualifier_list:
1454	storage_class_list
1455	\| type_qualifier_list storage_class_list // remaining OBSOLESCENT (see 2 )
1456	{ $$ = $1->addQualifiers( $2 ); }
1457	\| declaration_qualifier_list type_qualifier_list storage_class_list
1458	{ $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1459	;
1460
1461	storage_class_list:
1462	// A semantic check is necessary to ensure a storage class is appropriate for the kind of declaration and that
1463	// only one of each is specified, except for inline, which can appear with the others.
1464	//
1465	// ISO/IEC 9899:1999 Section 6.7.1(2) : At most, one storage-class specifier may be given in the declaration
1466	// specifiers in a declaration.
1467	storage_class
1468	\| storage_class_list storage_class
1469	{ $$ = $1->addQualifiers( $2 ); }
1470	;
1471
1472	storage_class:
1473	EXTERN
1474	{ $$ = DeclarationNode::newStorageClass( Type::Extern ); }
1475	\| STATIC
1476	{ $$ = DeclarationNode::newStorageClass( Type::Static ); }
1477	\| AUTO
1478	{ $$ = DeclarationNode::newStorageClass( Type::Auto ); }
1479	\| REGISTER
1480	{ $$ = DeclarationNode::newStorageClass( Type::Register ); }
1481	\| THREADLOCAL // C11
1482	{ $$ = DeclarationNode::newStorageClass( Type::Threadlocal ); }
1483	// Put function specifiers here to simplify parsing rules, but separate them semantically.
1484	\| INLINE // C99
1485	{ $$ = DeclarationNode::newFuncSpecifier( Type::Inline ); }
1486	\| FORTRAN // C99
1487	{ $$ = DeclarationNode::newFuncSpecifier( Type::Fortran ); }
1488	\| NORETURN // C11
1489	{ $$ = DeclarationNode::newFuncSpecifier( Type::Noreturn ); }
1490	;
1491
1492	basic_type_name:
1493	CHAR
1494	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Char ); }
1495	\| DOUBLE
1496	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Double ); }
1497	\| FLOAT
1498	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Float ); }
1499	\| INT
1500	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Int ); }
1501	\| LONG
1502	{ $$ = DeclarationNode::newLength( DeclarationNode::Long ); }
1503	\| SHORT
1504	{ $$ = DeclarationNode::newLength( DeclarationNode::Short ); }
1505	\| SIGNED
1506	{ $$ = DeclarationNode::newSignedNess( DeclarationNode::Signed ); }
1507	\| UNSIGNED
1508	{ $$ = DeclarationNode::newSignedNess( DeclarationNode::Unsigned ); }
1509	\| VOID
1510	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Void ); }
1511	\| BOOL // C99
1512	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Bool ); }
1513	\| COMPLEX // C99
1514	{ $$ = DeclarationNode::newComplexType( DeclarationNode::Complex ); }
1515	\| IMAGINARY // C99
1516	{ $$ = DeclarationNode::newComplexType( DeclarationNode::Imaginary ); }
1517	\| VALIST // GCC, __builtin_va_list
1518	{ $$ = DeclarationNode::newBuiltinType( DeclarationNode::Valist ); }
1519	\| ZERO_T
1520	{ $$ = DeclarationNode::newBuiltinType( DeclarationNode::Zero ); }
1521	\| ONE_T
1522	{ $$ = DeclarationNode::newBuiltinType( DeclarationNode::One ); }
1523	;
1524
1525	basic_declaration_specifier:
1526	// A semantic check is necessary for conflicting storage classes.
1527	basic_type_specifier
1528	\| declaration_qualifier_list basic_type_specifier
1529	{ $$ = $2->addQualifiers( $1 ); }
1530	\| basic_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1531	{ $$ = $1->addQualifiers( $2 ); }
1532	\| basic_declaration_specifier storage_class type_qualifier_list
1533	{ $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1534	\| basic_declaration_specifier storage_class basic_type_specifier
1535	{ $$ = $3->addQualifiers( $2 )->addType( $1 ); }
1536	;
1537
1538	basic_type_specifier:
1539	direct_type
1540	\| type_qualifier_list_opt indirect_type type_qualifier_list_opt
1541	{ $$ = $2->addQualifiers( $1 )->addQualifiers( $3 ); }
1542	;
1543
1544	direct_type:
1545	// A semantic check is necessary for conflicting type qualifiers.
1546	basic_type_name
1547	\| type_qualifier_list basic_type_name
1548	{ $$ = $2->addQualifiers( $1 ); }
1549	\| direct_type type_qualifier
1550	{ $$ = $1->addQualifiers( $2 ); }
1551	\| direct_type basic_type_name
1552	{ $$ = $1->addType( $2 ); }
1553	;
1554
1555	indirect_type:
1556	TYPEOF '(' type ')' // GCC: typeof(x) y;
1557	{ $$ = $3; }
1558	\| TYPEOF '(' comma_expression ')' // GCC: typeof(a+b) y;
1559	{ $$ = DeclarationNode::newTypeof( $3 ); }
1560	\| ATTR_TYPEGENname '(' type ')' // CFA: e.g., @type(x) y;
1561	{ $$ = DeclarationNode::newAttr( $1, $3 ); }
1562	\| ATTR_TYPEGENname '(' comma_expression ')' // CFA: e.g., @type(a+b) y;
1563	{ $$ = DeclarationNode::newAttr( $1, $3 ); }
1564	;
1565
1566	sue_declaration_specifier: // struct, union, enum + storage class + type specifier
1567	sue_type_specifier
1568	\| declaration_qualifier_list sue_type_specifier
1569	{ $$ = $2->addQualifiers( $1 ); }
1570	\| sue_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1571	{ $$ = $1->addQualifiers( $2 ); }
1572	\| sue_declaration_specifier storage_class type_qualifier_list
1573	{ $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1574	;
1575
1576	sue_type_specifier: // struct, union, enum + type specifier
1577	elaborated_type
1578	\| type_qualifier_list
1579	{ if ( $1->type != nullptr && $1->type->forall ) forall = true; } // remember generic type
1580	elaborated_type
1581	{ $$ = $3->addQualifiers( $1 ); }
1582	\| sue_type_specifier type_qualifier
1583	{ $$ = $1->addQualifiers( $2 ); }
1584	;
1585
1586	sue_declaration_specifier_nobody: // struct, union, enum - {...} + storage class + type specifier
1587	sue_type_specifier_nobody
1588	\| declaration_qualifier_list sue_type_specifier_nobody
1589	{ $$ = $2->addQualifiers( $1 ); }
1590	\| sue_declaration_specifier_nobody storage_class // remaining OBSOLESCENT (see 2)
1591	{ $$ = $1->addQualifiers( $2 ); }
1592	\| sue_declaration_specifier_nobody storage_class type_qualifier_list
1593	{ $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1594	;
1595
1596	sue_type_specifier_nobody: // struct, union, enum - {...} + type specifier
1597	elaborated_type_nobody
1598	\| type_qualifier_list elaborated_type_nobody
1599	{ $$ = $2->addQualifiers( $1 ); }
1600	\| sue_type_specifier_nobody type_qualifier
1601	{ $$ = $1->addQualifiers( $2 ); }
1602	;
1603
1604	type_declaration_specifier:
1605	type_type_specifier
1606	\| declaration_qualifier_list type_type_specifier
1607	{ $$ = $2->addQualifiers( $1 ); }
1608	\| type_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1609	{ $$ = $1->addQualifiers( $2 ); }
1610	\| type_declaration_specifier storage_class type_qualifier_list
1611	{ $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1612	;
1613
1614	type_type_specifier: // typedef types
1615	type_name
1616	\| type_qualifier_list type_name
1617	{ $$ = $2->addQualifiers( $1 ); }
1618	\| type_type_specifier type_qualifier
1619	{ $$ = $1->addQualifiers( $2 ); }
1620	;
1621
1622	type_name:
1623	TYPEDEFname
1624	{ $$ = DeclarationNode::newFromTypedef( $1 ); }
1625	\| '.' TYPEDEFname
1626	{ $$ = DeclarationNode::newFromTypedef( $2 ); } // FIX ME
1627	\| type_name '.' TYPEDEFname
1628	{ $$ = DeclarationNode::newFromTypedef( $3 ); } // FIX ME
1629	\| typegen_name
1630	\| '.' typegen_name
1631	{ $$ = $2; } // FIX ME
1632	\| type_name '.' typegen_name
1633	{ $$ = $3; } // FIX ME
1634	;
1635
1636	typegen_name: // CFA
1637	TYPEGENname '(' ')'
1638	{ $$ = DeclarationNode::newFromTypeGen( $1, nullptr ); }
1639	\| TYPEGENname '(' type_list ')'
1640	{ $$ = DeclarationNode::newFromTypeGen( $1, $3 ); }
1641	;
1642
1643	elaborated_type: // struct, union, enum
1644	aggregate_type
1645	\| enum_type
1646	;
1647
1648	elaborated_type_nobody: // struct, union, enum - {...}
1649	aggregate_type_nobody
1650	\| enum_type_nobody
1651	;
1652
1653	aggregate_type: // struct, union
1654	aggregate_key attribute_list_opt '{' field_declaration_list '}'
1655	{ $$ = DeclarationNode::newAggregate( $1, new string( DeclarationNode::anonymous.newName() ), nullptr, $4, true )->addQualifiers( $2 ); }
1656	\| aggregate_key attribute_list_opt no_attr_identifier_or_type_name
1657	{
1658	typedefTable.makeTypedef( *$3 ); // create typedef
1659	if ( forall ) typedefTable.changeKind( *$3, TypedefTable::TG ); // possibly update
1660	forall = false; // reset
1661	}
1662	'{' field_declaration_list '}'
1663	{ $$ = DeclarationNode::newAggregate( $1, $3, nullptr, $6, true )->addQualifiers( $2 ); }
1664	\| aggregate_key attribute_list_opt '(' type_list ')' '{' field_declaration_list '}' // CFA
1665	{ $$ = DeclarationNode::newAggregate( $1, new string( DeclarationNode::anonymous.newName() ), $4, $7, false )->addQualifiers( $2 ); }
1666	\| aggregate_type_nobody
1667	;
1668
1669	aggregate_type_nobody: // struct, union - {...}
1670	aggregate_key attribute_list_opt no_attr_identifier
1671	{
1672	typedefTable.makeTypedef( *$3 );
1673	$$ = DeclarationNode::newAggregate( $1, $3, nullptr, nullptr, false )->addQualifiers( $2 );
1674	}
1675	\| aggregate_key attribute_list_opt TYPEDEFname
1676	{
1677	typedefTable.makeTypedef( *$3 );
1678	$$ = DeclarationNode::newAggregate( $1, $3, nullptr, nullptr, false )->addQualifiers( $2 );
1679	}
1680	\| aggregate_key attribute_list_opt typegen_name // CFA
1681	{ $$ = $3->addQualifiers( $2 ); }
1682
1683	// Temp, testing TreeStruct
1684	\| STRUCT TRY attribute_list_opt no_attr_identifier_or_type_name
1685	{
1686	typedefTable.makeTypedef( *$4 ); // create typedef
1687	if ( forall ) typedefTable.changeKind( *$4, TypedefTable::TG ); // $
1688	forall = false; // reset
1689	}
1690	'{' field_declaration_list '}'
1691	{
1692	$$ = DeclarationNode::newTreeStruct( DeclarationNode::Struct,
1693	$4, nullptr, nullptr, $7, true )->addQualifiers( $3 );
1694	}
1695	\| STRUCT TRY attribute_list_opt no_attr_identifier_or_type_name TYPEDEFname
1696	{
1697	typedefTable.makeTypedef( *$4 ); // create typedef
1698	if ( forall ) typedefTable.changeKind( *$4, TypedefTable::TG ); // $
1699	forall = false; // reset
1700	}
1701	'{' field_declaration_list '}'
1702	{
1703	$$ = DeclarationNode::newTreeStruct( DeclarationNode::Struct,
1704	$4, $5, nullptr, $8, true )->addQualifiers( $3 );
1705	}
1706	;
1707
1708	aggregate_key:
1709	STRUCT
1710	{ $$ = DeclarationNode::Struct; }
1711	\| UNION
1712	{ $$ = DeclarationNode::Union; }
1713	\| COROUTINE
1714	{ $$ = DeclarationNode::Coroutine; }
1715	\| MONITOR
1716	{ $$ = DeclarationNode::Monitor; }
1717	\| THREAD
1718	{ $$ = DeclarationNode::Thread; }
1719	;
1720
1721	field_declaration_list:
1722	// empty
1723	{ $$ = nullptr; }
1724	\| field_declaration_list field_declaration
1725	{ $$ = $1 ? $1->appendList( $2 ) : $2; }
1726	;
1727
1728	field_declaration:
1729	cfa_field_declaring_list ';' // CFA, new style field declaration
1730	\| EXTENSION cfa_field_declaring_list ';' // GCC
1731	{
1732	distExt( $2 ); // mark all fields in list
1733	$$ = $2;
1734	}
1735	\| type_specifier field_declaring_list ';'
1736	{
1737	$$ = distAttr( $1, $2 ); }
1738	\| EXTENSION type_specifier field_declaring_list ';' // GCC
1739	{
1740	distExt( $3 ); // mark all fields in list
1741	$$ = distAttr( $2, $3 );
1742	}
1743	;
1744
1745	cfa_field_declaring_list: // CFA, new style field declaration
1746	cfa_abstract_declarator_tuple // CFA, no field name
1747	\| cfa_abstract_declarator_tuple no_attr_identifier_or_type_name
1748	{ $$ = $1->addName( $2 ); }
1749	\| cfa_field_declaring_list ',' no_attr_identifier_or_type_name
1750	{ $$ = $1->appendList( $1->cloneType( $3 ) ); }
1751	\| cfa_field_declaring_list ',' // CFA, no field name
1752	{ $$ = $1->appendList( $1->cloneType( 0 ) ); }
1753	;
1754
1755	field_declaring_list:
1756	field_declarator
1757	\| field_declaring_list ',' attribute_list_opt field_declarator
1758	{ $$ = $1->appendList( $4->addQualifiers( $3 ) ); }
1759	;
1760
1761	field_declarator:
1762	// empty
1763	{ $$ = DeclarationNode::newName( 0 ); /* XXX */ } // CFA, no field name
1764	// '@'
1765	// { $$ = DeclarationNode::newName( new string( DeclarationNode::anonymous.newName() ) ); } // CFA, no field name
1766	\| bit_subrange_size // no field name
1767	{ $$ = DeclarationNode::newBitfield( $1 ); }
1768	\| variable_declarator bit_subrange_size_opt
1769	// A semantic check is required to ensure bit_subrange only appears on base type int.
1770	{ $$ = $1->addBitfield( $2 ); }
1771	\| variable_type_redeclarator bit_subrange_size_opt
1772	// A semantic check is required to ensure bit_subrange only appears on base type int.
1773	{ $$ = $1->addBitfield( $2 ); }
1774	\| variable_abstract_declarator // CFA, no field name
1775	;
1776
1777	bit_subrange_size_opt:
1778	// empty
1779	{ $$ = nullptr; }
1780	\| bit_subrange_size
1781	{ $$ = $1; }
1782	;
1783
1784	bit_subrange_size:
1785	':' constant_expression
1786	{ $$ = $2; }
1787	;
1788
1789	enum_type: // enum
1790	ENUM attribute_list_opt '{' enumerator_list comma_opt '}'
1791	{ $$ = DeclarationNode::newEnum( new string( DeclarationNode::anonymous.newName() ), $4, true )->addQualifiers( $2 ); }
1792	\| ENUM attribute_list_opt no_attr_identifier_or_type_name
1793	{ typedefTable.makeTypedef( *$3 ); }
1794	'{' enumerator_list comma_opt '}'
1795	{ $$ = DeclarationNode::newEnum( $3, $6, true )->addQualifiers( $2 ); }
1796	\| enum_type_nobody
1797	;
1798
1799	enum_type_nobody: // enum - {...}
1800	ENUM attribute_list_opt no_attr_identifier_or_type_name
1801	{
1802	typedefTable.makeTypedef( *$3 );
1803	$$ = DeclarationNode::newEnum( $3, 0, false )->addQualifiers( $2 );
1804	}
1805	;
1806
1807	enumerator_list:
1808	no_attr_identifier_or_type_name enumerator_value_opt
1809	{ $$ = DeclarationNode::newEnumConstant( $1, $2 ); }
1810	\| enumerator_list ',' no_attr_identifier_or_type_name enumerator_value_opt
1811	{ $$ = $1->appendList( DeclarationNode::newEnumConstant( $3, $4 ) ); }
1812	;
1813
1814	enumerator_value_opt:
1815	// empty
1816	{ $$ = nullptr; }
1817	\| '=' constant_expression
1818	{ $$ = $2; }
1819	;
1820
1821	// Minimum of one parameter after which ellipsis is allowed only at the end.
1822
1823	cfa_parameter_type_list_opt: // CFA
1824	// empty
1825	{ $$ = nullptr; }
1826	\| cfa_parameter_type_list
1827	;
1828
1829	cfa_parameter_type_list: // CFA, abstract + real
1830	cfa_abstract_parameter_list
1831	\| cfa_parameter_list
1832	\| cfa_parameter_list pop ',' push cfa_abstract_parameter_list
1833	{ $$ = $1->appendList( $5 ); }
1834	\| cfa_abstract_parameter_list pop ',' push ELLIPSIS
1835	{ $$ = $1->addVarArgs(); }
1836	\| cfa_parameter_list pop ',' push ELLIPSIS
1837	{ $$ = $1->addVarArgs(); }
1838	;
1839
1840	cfa_parameter_list: // CFA
1841	// To obtain LR(1) between cfa_parameter_list and cfa_abstract_tuple, the last cfa_abstract_parameter_list is
1842	// factored out from cfa_parameter_list, flattening the rules to get lookahead to the ']'.
1843	cfa_parameter_declaration
1844	\| cfa_abstract_parameter_list pop ',' push cfa_parameter_declaration
1845	{ $$ = $1->appendList( $5 ); }
1846	\| cfa_parameter_list pop ',' push cfa_parameter_declaration
1847	{ $$ = $1->appendList( $5 ); }
1848	\| cfa_parameter_list pop ',' push cfa_abstract_parameter_list pop ',' push cfa_parameter_declaration
1849	{ $$ = $1->appendList( $5 )->appendList( $9 ); }
1850	;
1851
1852	cfa_abstract_parameter_list: // CFA, new & old style abstract
1853	cfa_abstract_parameter_declaration
1854	\| cfa_abstract_parameter_list pop ',' push cfa_abstract_parameter_declaration
1855	{ $$ = $1->appendList( $5 ); }
1856	;
1857
1858	parameter_type_list_opt:
1859	// empty
1860	{ $$ = nullptr; }
1861	\| parameter_type_list
1862	;
1863
1864	parameter_type_list:
1865	parameter_list
1866	\| parameter_list pop ',' push ELLIPSIS
1867	{ $$ = $1->addVarArgs(); }
1868	;
1869
1870	parameter_list: // abstract + real
1871	abstract_parameter_declaration
1872	\| parameter_declaration
1873	\| parameter_list pop ',' push abstract_parameter_declaration
1874	{ $$ = $1->appendList( $5 ); }
1875	\| parameter_list pop ',' push parameter_declaration
1876	{ $$ = $1->appendList( $5 ); }
1877	;
1878
1879	// Provides optional identifier names (abstract_declarator/variable_declarator), no initialization, different semantics
1880	// for typedef name by using type_parameter_redeclarator instead of typedef_redeclarator, and function prototypes.
1881
1882	cfa_parameter_declaration: // CFA, new & old style parameter declaration
1883	parameter_declaration
1884	\| cfa_identifier_parameter_declarator_no_tuple identifier_or_type_name default_initialize_opt
1885	{ $$ = $1->addName( $2 ); }
1886	\| cfa_abstract_tuple identifier_or_type_name default_initialize_opt
1887	// To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator).
1888	{ $$ = $1->addName( $2 ); }
1889	\| type_qualifier_list cfa_abstract_tuple identifier_or_type_name default_initialize_opt
1890	{ $$ = $2->addName( $3 )->addQualifiers( $1 ); }
1891	\| cfa_function_specifier
1892	;
1893
1894	cfa_abstract_parameter_declaration: // CFA, new & old style parameter declaration
1895	abstract_parameter_declaration
1896	\| cfa_identifier_parameter_declarator_no_tuple
1897	\| cfa_abstract_tuple
1898	// To obtain LR(1), these rules must be duplicated here (see cfa_abstract_declarator).
1899	\| type_qualifier_list cfa_abstract_tuple
1900	{ $$ = $2->addQualifiers( $1 ); }
1901	\| cfa_abstract_function
1902	;
1903
1904	parameter_declaration:
1905	// No SUE declaration in parameter list.
1906	declaration_specifier_nobody identifier_parameter_declarator default_initialize_opt
1907	{
1908	typedefTable.addToEnclosingScope( TypedefTable::ID );
1909	$$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr );
1910	}
1911	\| declaration_specifier_nobody type_parameter_redeclarator default_initialize_opt
1912	{
1913	typedefTable.addToEnclosingScope( TypedefTable::ID );
1914	$$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr );
1915	}
1916	;
1917
1918	abstract_parameter_declaration:
1919	declaration_specifier_nobody default_initialize_opt
1920	{ $$ = $1->addInitializer( $2 ? new InitializerNode( $2 ) : nullptr ); }
1921	\| declaration_specifier_nobody abstract_parameter_declarator default_initialize_opt
1922	{ $$ = $2->addType( $1 )->addInitializer( $3 ? new InitializerNode( $3 ) : nullptr ); }
1923	;
1924
1925	// ISO/IEC 9899:1999 Section 6.9.1(6) : "An identifier declared as a typedef name shall not be redeclared as a
1926	// parameter." Because the scope of the K&R-style parameter-list sees the typedef first, the following is based only on
1927	// identifiers. The ANSI-style parameter-list can redefine a typedef name.
1928
1929	identifier_list: // K&R-style parameter list => no types
1930	no_attr_identifier
1931	{ $$ = DeclarationNode::newName( $1 ); }
1932	\| identifier_list ',' no_attr_identifier
1933	{ $$ = $1->appendList( DeclarationNode::newName( $3 ) ); }
1934	;
1935
1936	identifier_or_type_name:
1937	identifier
1938	\| TYPEDEFname
1939	\| TYPEGENname
1940	;
1941
1942	no_attr_identifier_or_type_name:
1943	no_attr_identifier
1944	\| TYPEDEFname
1945	\| TYPEGENname
1946	;
1947
1948	type_no_function: // sizeof, alignof, cast (constructor)
1949	cfa_abstract_declarator_tuple // CFA
1950	\| type_specifier
1951	\| type_specifier abstract_declarator
1952	{ $$ = $2->addType( $1 ); }
1953	;
1954
1955	type: // typeof, assertion
1956	type_no_function
1957	\| cfa_abstract_function // CFA
1958	;
1959
1960	initializer_opt:
1961	// empty
1962	{ $$ = nullptr; }
1963	\| '=' initializer
1964	{ $$ = $2; }
1965	\| ATassign initializer
1966	{ $$ = $2->set_maybeConstructed( false ); }
1967	;
1968
1969	initializer:
1970	assignment_expression { $$ = new InitializerNode( $1 ); }
1971	\| '{' initializer_list comma_opt '}' { $$ = new InitializerNode( $2, true ); }
1972	;
1973
1974	initializer_list:
1975	// empty
1976	{ $$ = nullptr; }
1977	\| initializer
1978	\| designation initializer { $$ = $2->set_designators( $1 ); }
1979	\| initializer_list ',' initializer { $$ = (InitializerNode *)( $1->set_last( $3 ) ); }
1980	\| initializer_list ',' designation initializer
1981	{ $$ = (InitializerNode *)( $1->set_last( $4->set_designators( $3 ) ) ); }
1982	;
1983
1984	// There is an unreconcileable parsing problem between C99 and CFA with respect to designators. The problem is use of
1985	// '=' to separator the designator from the initializer value, as in:
1986	//
1987	// int x[10] = { [1] = 3 };
1988	//
1989	// The string "[1] = 3" can be parsed as a designator assignment or a tuple assignment. To disambiguate this case, CFA
1990	// changes the syntax from "=" to ":" as the separator between the designator and initializer. GCC does uses ":" for
1991	// field selection. The optional use of the "=" in GCC, or in this case ":", cannot be supported either due to
1992	// shift/reduce conflicts
1993
1994	designation:
1995	designator_list ':' // C99, CFA uses ":" instead of "="
1996	\| no_attr_identifier ':' // GCC, field name
1997	{ $$ = new ExpressionNode( build_varref( $1 ) ); }
1998	;
1999
2000	designator_list: // C99
2001	designator
2002	\| designator_list designator
2003	{ $$ = (ExpressionNode *)( $1->set_last( $2 ) ); }
2004	//\| designator_list designator { $$ = new ExpressionNode( $1, $2 ); }
2005	;
2006
2007	designator:
2008	'.' no_attr_identifier // C99, field name
2009	{ $$ = new ExpressionNode( build_varref( $2 ) ); }
2010	\| '[' push assignment_expression pop ']' // C99, single array element
2011	// assignment_expression used instead of constant_expression because of shift/reduce conflicts with tuple.
2012	{ $$ = $3; }
2013	\| '[' push subrange pop ']' // CFA, multiple array elements
2014	{ $$ = $3; }
2015	\| '[' push constant_expression ELLIPSIS constant_expression pop ']' // GCC, multiple array elements
2016	{ $$ = new ExpressionNode( build_range( $3, $5 ) ); }
2017	\| '.' '[' push field_list pop ']' // CFA, tuple field selector
2018	{ $$ = $4; }
2019	;
2020
2021	// The CFA type system is based on parametric polymorphism, the ability to declare functions with type parameters,
2022	// rather than an object-oriented type system. This required four groups of extensions:
2023	//
2024	// Overloading: function, data, and operator identifiers may be overloaded.
2025	//
2026	// Type declarations: "type" is used to generate new types for declaring objects. Similarly, "dtype" is used for object
2027	// and incomplete types, and "ftype" is used for function types. Type declarations with initializers provide
2028	// definitions of new types. Type declarations with storage class "extern" provide opaque types.
2029	//
2030	// Polymorphic functions: A forall clause declares a type parameter. The corresponding argument is inferred at the call
2031	// site. A polymorphic function is not a template; it is a function, with an address and a type.
2032	//
2033	// Specifications and Assertions: Specifications are collections of declarations parameterized by one or more
2034	// types. They serve many of the purposes of abstract classes, and specification hierarchies resemble subclass
2035	// hierarchies. Unlike classes, they can define relationships between types. Assertions declare that a type or
2036	// types provide the operations declared by a specification. Assertions are normally used to declare requirements
2037	// on type arguments of polymorphic functions.
2038
2039	type_parameter_list: // CFA
2040	type_parameter
2041	{ $$ = $1; }
2042	\| type_parameter_list ',' type_parameter
2043	{ $$ = $1->appendList( $3 ); }
2044	;
2045
2046	type_initializer_opt: // CFA
2047	// empty
2048	{ $$ = nullptr; }
2049	\| '=' type
2050	{ $$ = $2; }
2051	;
2052
2053	type_parameter: // CFA
2054	type_class no_attr_identifier_or_type_name
2055	{ typedefTable.addToEnclosingScope( *$2, TypedefTable::TD ); }
2056	type_initializer_opt assertion_list_opt
2057	{ $$ = DeclarationNode::newTypeParam( $1, $2 )->addTypeInitializer( $4 )->addAssertions( $5 ); }
2058	\| type_specifier identifier_parameter_declarator
2059	;
2060
2061	type_class: // CFA
2062	OTYPE
2063	{ $$ = DeclarationNode::Otype; }
2064	\| DTYPE
2065	{ $$ = DeclarationNode::Dtype; }
2066	\| FTYPE
2067	{ $$ = DeclarationNode::Ftype; }
2068	\| TTYPE
2069	{ $$ = DeclarationNode::Ttype; }
2070	;
2071
2072	assertion_list_opt: // CFA
2073	// empty
2074	{ $$ = nullptr; }
2075	\| assertion_list_opt assertion
2076	{ $$ = $1 ? $1->appendList( $2 ) : $2; }
2077	;
2078
2079	assertion: // CFA
2080	'\|' no_attr_identifier_or_type_name '(' type_list ')'
2081	{
2082	typedefTable.openTrait( *$2 );
2083	$$ = DeclarationNode::newTraitUse( $2, $4 );
2084	}
2085	\| '\|' '{' push trait_declaration_list '}'
2086	{ $$ = $4; }
2087	\| '\|' '(' push type_parameter_list pop ')' '{' push trait_declaration_list '}' '(' type_list ')'
2088	{ $$ = nullptr; }
2089	;
2090
2091	type_list: // CFA
2092	type
2093	{ $$ = new ExpressionNode( build_typevalue( $1 ) ); }
2094	\| assignment_expression
2095	\| type_list ',' type
2096	{ $$ = (ExpressionNode *)( $1->set_last( new ExpressionNode( build_typevalue( $3 ) ) ) ); }
2097	\| type_list ',' assignment_expression
2098	{ $$ = (ExpressionNode *)( $1->set_last( $3 )); }
2099	;
2100
2101	type_declaring_list: // CFA
2102	OTYPE type_declarator
2103	{ $$ = $2; }
2104	\| storage_class_list OTYPE type_declarator
2105	{ $$ = $3->addQualifiers( $1 ); }
2106	\| type_declaring_list ',' type_declarator
2107	{ $$ = $1->appendList( $3->copySpecifiers( $1 ) ); }
2108	;
2109
2110	type_declarator: // CFA
2111	type_declarator_name assertion_list_opt
2112	{ $$ = $1->addAssertions( $2 ); }
2113	\| type_declarator_name assertion_list_opt '=' type
2114	{ $$ = $1->addAssertions( $2 )->addType( $4 ); }
2115	;
2116
2117	type_declarator_name: // CFA
2118	no_attr_identifier_or_type_name
2119	{
2120	typedefTable.addToEnclosingScope( *$1, TypedefTable::TD );
2121	$$ = DeclarationNode::newTypeDecl( $1, 0 );
2122	}
2123	\| no_attr_identifier_or_type_name '(' push type_parameter_list pop ')'
2124	{
2125	typedefTable.addToEnclosingScope( *$1, TypedefTable::TG );
2126	$$ = DeclarationNode::newTypeDecl( $1, $4 );
2127	}
2128	;
2129
2130	trait_specifier: // CFA
2131	TRAIT no_attr_identifier_or_type_name '(' push type_parameter_list pop ')' '{' '}'
2132	{
2133	typedefTable.addToEnclosingScope( *$2, TypedefTable::ID );
2134	$$ = DeclarationNode::newTrait( $2, $5, 0 );
2135	}
2136	\| TRAIT no_attr_identifier_or_type_name '(' push type_parameter_list pop ')' '{'
2137	{
2138	typedefTable.enterTrait( *$2 );
2139	typedefTable.enterScope();
2140	}
2141	trait_declaration_list '}'
2142	{
2143	typedefTable.leaveTrait();
2144	typedefTable.addToEnclosingScope( *$2, TypedefTable::ID );
2145	$$ = DeclarationNode::newTrait( $2, $5, $10 );
2146	}
2147	;
2148
2149	trait_declaration_list: // CFA
2150	trait_declaration
2151	\| trait_declaration_list push trait_declaration
2152	{ $$ = $1->appendList( $3 ); }
2153	;
2154
2155	trait_declaration: // CFA
2156	cfa_trait_declaring_list pop ';'
2157	\| trait_declaring_list pop ';'
2158	;
2159
2160	cfa_trait_declaring_list: // CFA
2161	cfa_variable_specifier
2162	{
2163	typedefTable.addToEnclosingScope2( TypedefTable::ID );
2164	$$ = $1;
2165	}
2166	\| cfa_function_specifier
2167	{
2168	typedefTable.addToEnclosingScope2( TypedefTable::ID );
2169	$$ = $1;
2170	}
2171	\| cfa_trait_declaring_list pop ',' push identifier_or_type_name
2172	{
2173	typedefTable.addToEnclosingScope2( *$5, TypedefTable::ID );
2174	$$ = $1->appendList( $1->cloneType( $5 ) );
2175	}
2176	;
2177
2178	trait_declaring_list: // CFA
2179	type_specifier declarator
2180	{
2181	typedefTable.addToEnclosingScope2( TypedefTable::ID );
2182	$$ = $2->addType( $1 );
2183	}
2184	\| trait_declaring_list pop ',' push declarator
2185	{
2186	typedefTable.addToEnclosingScope2( TypedefTable::ID );
2187	$$ = $1->appendList( $1->cloneBaseType( $5 ) );
2188	}
2189	;
2190
2191	//*************************** EXTERNAL DEFINITIONS ***************************
2192
2193	translation_unit:
2194	// empty
2195	{} // empty input file
2196	\| external_definition_list
2197	{ parseTree = parseTree ? parseTree->appendList( $1 ) : $1; }
2198	;
2199
2200	external_definition_list:
2201	external_definition
2202	\| external_definition_list push external_definition
2203	{ $$ = $1 ? $1->appendList( $3 ) : $3; }
2204	;
2205
2206	external_definition_list_opt:
2207	// empty
2208	{ $$ = nullptr; }
2209	\| external_definition_list
2210	;
2211
2212	external_definition:
2213	declaration
2214	\| external_function_definition
2215	\| ASM '(' string_literal ')' ';' // GCC, global assembler statement
2216	{
2217	$$ = DeclarationNode::newAsmStmt( new StatementNode( build_asmstmt( false, $3, 0 ) ) );
2218	}
2219	\| EXTERN STRINGliteral // C++-style linkage specifier
2220	{
2221	linkageStack.push( linkage ); // handle nested extern "C"/"Cforall"
2222	linkage = LinkageSpec::linkageUpdate( linkage, $2 );
2223	}
2224	'{' external_definition_list_opt '}'
2225	{
2226	linkage = linkageStack.top();
2227	linkageStack.pop();
2228	$$ = $5;
2229	}
2230	\| EXTENSION external_definition // GCC, multiple __extension__ allowed, meaning unknown
2231	{
2232	distExt( $2 ); // mark all fields in list
2233	$$ = $2;
2234	}
2235	;
2236
2237	external_function_definition:
2238	function_definition
2239	// These rules are a concession to the "implicit int" type_specifier because there is a significant amount of
2240	// legacy code with global functions missing the type-specifier for the return type, and assuming "int".
2241	// Parsing is possible because function_definition does not appear in the context of an expression (nested
2242	// functions preclude this concession, i.e., all nested function must have a return type). A function prototype
2243	// declaration must still have a type_specifier. OBSOLESCENT (see 1)
2244	\| function_declarator compound_statement
2245	{
2246	typedefTable.addToEnclosingScope( TypedefTable::ID );
2247	typedefTable.leaveScope();
2248	$$ = $1->addFunctionBody( $2 );
2249	}
2250	\| KR_function_declarator push KR_declaration_list_opt compound_statement
2251	{
2252	typedefTable.addToEnclosingScope( TypedefTable::ID );
2253	typedefTable.leaveScope();
2254	$$ = $1->addOldDeclList( $3 )->addFunctionBody( $4 );
2255	}
2256	;
2257
2258	with_clause_opt:
2259	// empty
2260	{ $$ = (StatementNode *)0; } // FIX ME
2261	\| WITH '(' tuple_expression_list ')'
2262	{ $$ = (StatementNode *)0; } // FIX ME
2263	;
2264
2265	function_definition:
2266	cfa_function_declaration with_clause_opt compound_statement // CFA
2267	{
2268	typedefTable.addToEnclosingScope( TypedefTable::ID );
2269	typedefTable.leaveScope();
2270	$$ = $1->addFunctionBody( $3 );
2271	}
2272	\| declaration_specifier function_declarator with_clause_opt compound_statement
2273	{
2274	typedefTable.addToEnclosingScope( TypedefTable::ID );
2275	typedefTable.leaveScope();
2276	$$ = $2->addFunctionBody( $4 )->addType( $1 );
2277	}
2278	\| type_qualifier_list function_declarator with_clause_opt compound_statement
2279	{
2280	typedefTable.addToEnclosingScope( TypedefTable::ID );
2281	typedefTable.leaveScope();
2282	$$ = $2->addFunctionBody( $4 )->addQualifiers( $1 );
2283	}
2284	\| declaration_qualifier_list function_declarator with_clause_opt compound_statement
2285	{
2286	typedefTable.addToEnclosingScope( TypedefTable::ID );
2287	typedefTable.leaveScope();
2288	$$ = $2->addFunctionBody( $4 )->addQualifiers( $1 );
2289	}
2290	\| declaration_qualifier_list type_qualifier_list function_declarator with_clause_opt compound_statement
2291	{
2292	typedefTable.addToEnclosingScope( TypedefTable::ID );
2293	typedefTable.leaveScope();
2294	$$ = $3->addFunctionBody( $5 )->addQualifiers( $2 )->addQualifiers( $1 );
2295	}
2296
2297	// Old-style K&R function definition, OBSOLESCENT (see 4)
2298	\| declaration_specifier KR_function_declarator push KR_declaration_list_opt with_clause_opt compound_statement
2299	{
2300	typedefTable.addToEnclosingScope( TypedefTable::ID );
2301	typedefTable.leaveScope();
2302	$$ = $2->addOldDeclList( $4 )->addFunctionBody( $6 )->addType( $1 );
2303	}
2304	\| type_qualifier_list KR_function_declarator push KR_declaration_list_opt with_clause_opt compound_statement
2305	{
2306	typedefTable.addToEnclosingScope( TypedefTable::ID );
2307	typedefTable.leaveScope();
2308	$$ = $2->addOldDeclList( $4 )->addFunctionBody( $6 )->addQualifiers( $1 );
2309	}
2310
2311	// Old-style K&R function definition with "implicit int" type_specifier, OBSOLESCENT (see 4)
2312	\| declaration_qualifier_list KR_function_declarator push KR_declaration_list_opt with_clause_opt compound_statement
2313	{
2314	typedefTable.addToEnclosingScope( TypedefTable::ID );
2315	typedefTable.leaveScope();
2316	$$ = $2->addOldDeclList( $4 )->addFunctionBody( $6 )->addQualifiers( $1 );
2317	}
2318	\| declaration_qualifier_list type_qualifier_list KR_function_declarator push KR_declaration_list_opt with_clause_opt compound_statement
2319	{
2320	typedefTable.addToEnclosingScope( TypedefTable::ID );
2321	typedefTable.leaveScope();
2322	$$ = $3->addOldDeclList( $5 )->addFunctionBody( $7 )->addQualifiers( $2 )->addQualifiers( $1 );
2323	}
2324	;
2325
2326	declarator:
2327	variable_declarator
2328	\| variable_type_redeclarator
2329	\| function_declarator
2330	;
2331
2332	subrange:
2333	constant_expression '~' constant_expression // CFA, integer subrange
2334	{ $$ = new ExpressionNode( build_range( $1, $3 ) ); }
2335	;
2336
2337	asm_name_opt: // GCC
2338	// empty
2339	{ $$ = nullptr; }
2340	\| ASM '(' string_literal ')' attribute_list_opt
2341	{
2342	DeclarationNode * name = new DeclarationNode();
2343	name->asmName = $3;
2344	$$ = name->addQualifiers( $5 );
2345	}
2346	;
2347
2348	attribute_list_opt: // GCC
2349	// empty
2350	{ $$ = nullptr; }
2351	\| attribute_list
2352	;
2353
2354	attribute_list: // GCC
2355	attribute
2356	\| attribute_list attribute
2357	{ $$ = $2->addQualifiers( $1 ); }
2358	;
2359
2360	attribute: // GCC
2361	ATTRIBUTE '(' '(' attribute_name_list ')' ')'
2362	{ $$ = $4; }
2363	;
2364
2365	attribute_name_list: // GCC
2366	attribute_name
2367	\| attribute_name_list ',' attribute_name
2368	{ $$ = $3->addQualifiers( $1 ); }
2369	;
2370
2371	attribute_name: // GCC
2372	// empty
2373	{ $$ = nullptr; }
2374	\| attr_name
2375	{ $$ = DeclarationNode::newAttribute( $1 ); }
2376	\| attr_name '(' argument_expression_list ')'
2377	{ $$ = DeclarationNode::newAttribute( $1, $3 ); }
2378	;
2379
2380	attr_name: // GCC
2381	IDENTIFIER
2382	\| TYPEDEFname
2383	\| TYPEGENname
2384	\| CONST
2385	{ $$ = Token{ new string( "__const__" ), { nullptr, -1 } }; }
2386	;
2387
2388	// ============================================================================
2389	// The following sections are a series of grammar patterns used to parse declarators. Multiple patterns are necessary
2390	// because the type of an identifier in wrapped around the identifier in the same form as its usage in an expression, as
2391	// in:
2392	//
2393	// int (*f())[10] { ... };
2394	// ... (*f())[3] += 1; // definition mimics usage
2395	//
2396	// Because these patterns are highly recursive, changes at a lower level in the recursion require copying some or all of
2397	// the pattern. Each of these patterns has some subtle variation to ensure correct syntax in a particular context.
2398	// ============================================================================
2399
2400	// ----------------------------------------------------------------------------
2401	// The set of valid declarators before a compound statement for defining a function is less than the set of declarators
2402	// to define a variable or function prototype, e.g.:
2403	//
2404	// valid declaration invalid definition
2405	// ----------------- ------------------
2406	// int f; int f {}
2407	// int f; int f {}
2408	// int f[10]; int f[10] {}
2409	// int (f)(int); int (f)(int) {}
2410	//
2411	// To preclude this syntactic anomaly requires separating the grammar rules for variable and function declarators, hence
2412	// variable_declarator and function_declarator.
2413	// ----------------------------------------------------------------------------
2414
2415	// This pattern parses a declaration of a variable that is not redefining a typedef name. The pattern precludes
2416	// declaring an array of functions versus a pointer to an array of functions.
2417
2418	variable_declarator:
2419	paren_identifier attribute_list_opt
2420	{ $$ = $1->addQualifiers( $2 ); }
2421	\| variable_ptr
2422	\| variable_array attribute_list_opt
2423	{ $$ = $1->addQualifiers( $2 ); }
2424	\| variable_function attribute_list_opt
2425	{ $$ = $1->addQualifiers( $2 ); }
2426	;
2427
2428	paren_identifier:
2429	identifier
2430	{
2431	typedefTable.setNextIdentifier( *$1 );
2432	$$ = DeclarationNode::newName( $1 );
2433	}
2434	\| '(' paren_identifier ')' // redundant parenthesis
2435	{ $$ = $2; }
2436	;
2437
2438	variable_ptr:
2439	ptrref_operator variable_declarator
2440	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2441	\| ptrref_operator type_qualifier_list variable_declarator
2442	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2443	\| '(' variable_ptr ')' attribute_list_opt
2444	{ $$ = $2->addQualifiers( $4 ); } // redundant parenthesis
2445	;
2446
2447	variable_array:
2448	paren_identifier array_dimension
2449	{ $$ = $1->addArray( $2 ); }
2450	\| '(' variable_ptr ')' array_dimension
2451	{ $$ = $2->addArray( $4 ); }
2452	\| '(' variable_array ')' multi_array_dimension // redundant parenthesis
2453	{ $$ = $2->addArray( $4 ); }
2454	\| '(' variable_array ')' // redundant parenthesis
2455	{ $$ = $2; }
2456	;
2457
2458	variable_function:
2459	'(' variable_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2460	{ $$ = $2->addParamList( $6 ); }
2461	\| '(' variable_function ')' // redundant parenthesis
2462	{ $$ = $2; }
2463	;
2464
2465	// This pattern parses a function declarator that is not redefining a typedef name. For non-nested functions, there is
2466	// no context where a function definition can redefine a typedef name, i.e., the typedef and function name cannot exist
2467	// is the same scope. The pattern precludes returning arrays and functions versus pointers to arrays and functions.
2468
2469	function_declarator:
2470	function_no_ptr attribute_list_opt
2471	{ $$ = $1->addQualifiers( $2 ); }
2472	\| function_ptr
2473	\| function_array attribute_list_opt
2474	{ $$ = $1->addQualifiers( $2 ); }
2475	;
2476
2477	function_no_ptr:
2478	paren_identifier '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2479	{ $$ = $1->addParamList( $4 ); }
2480	\| '(' function_ptr ')' '(' push parameter_type_list_opt pop ')'
2481	{ $$ = $2->addParamList( $6 ); }
2482	\| '(' function_no_ptr ')' // redundant parenthesis
2483	{ $$ = $2; }
2484	;
2485
2486	function_ptr:
2487	ptrref_operator function_declarator
2488	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2489	\| ptrref_operator type_qualifier_list function_declarator
2490	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2491	\| '(' function_ptr ')'
2492	{ $$ = $2; }
2493	;
2494
2495	function_array:
2496	'(' function_ptr ')' array_dimension
2497	{ $$ = $2->addArray( $4 ); }
2498	\| '(' function_array ')' multi_array_dimension // redundant parenthesis
2499	{ $$ = $2->addArray( $4 ); }
2500	\| '(' function_array ')' // redundant parenthesis
2501	{ $$ = $2; }
2502	;
2503
2504	// This pattern parses an old-style K&R function declarator (OBSOLESCENT, see 4)
2505	//
2506	// f( a, b, c ) int a, *b, c[]; {}
2507	//
2508	// that is not redefining a typedef name (see function_declarator for additional comments). The pattern precludes
2509	// returning arrays and functions versus pointers to arrays and functions.
2510
2511	KR_function_declarator:
2512	KR_function_no_ptr
2513	\| KR_function_ptr
2514	\| KR_function_array
2515	;
2516
2517	KR_function_no_ptr:
2518	paren_identifier '(' identifier_list ')' // function_declarator handles empty parameter
2519	{ $$ = $1->addIdList( $3 ); }
2520	\| '(' KR_function_ptr ')' '(' push parameter_type_list_opt pop ')'
2521	{ $$ = $2->addParamList( $6 ); }
2522	\| '(' KR_function_no_ptr ')' // redundant parenthesis
2523	{ $$ = $2; }
2524	;
2525
2526	KR_function_ptr:
2527	ptrref_operator KR_function_declarator
2528	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2529	\| ptrref_operator type_qualifier_list KR_function_declarator
2530	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2531	\| '(' KR_function_ptr ')'
2532	{ $$ = $2; }
2533	;
2534
2535	KR_function_array:
2536	'(' KR_function_ptr ')' array_dimension
2537	{ $$ = $2->addArray( $4 ); }
2538	\| '(' KR_function_array ')' multi_array_dimension // redundant parenthesis
2539	{ $$ = $2->addArray( $4 ); }
2540	\| '(' KR_function_array ')' // redundant parenthesis
2541	{ $$ = $2; }
2542	;
2543
2544	// This pattern parses a declaration for a variable or function prototype that redefines a type name, e.g.:
2545	//
2546	// typedef int foo;
2547	// {
2548	// int foo; // redefine typedef name in new scope
2549	// }
2550	//
2551	// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
2552	// and functions versus pointers to arrays and functions.
2553
2554	variable_type_redeclarator:
2555	paren_type attribute_list_opt
2556	{ $$ = $1->addQualifiers( $2 ); }
2557	\| type_ptr
2558	\| type_array attribute_list_opt
2559	{ $$ = $1->addQualifiers( $2 ); }
2560	\| type_function attribute_list_opt
2561	{ $$ = $1->addQualifiers( $2 ); }
2562	;
2563
2564	paren_type:
2565	typedef
2566	\| '(' paren_type ')'
2567	{ $$ = $2; }
2568	;
2569
2570	type_ptr:
2571	ptrref_operator variable_type_redeclarator
2572	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2573	\| ptrref_operator type_qualifier_list variable_type_redeclarator
2574	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2575	\| '(' type_ptr ')' attribute_list_opt
2576	{ $$ = $2->addQualifiers( $4 ); }
2577	;
2578
2579	type_array:
2580	paren_type array_dimension
2581	{ $$ = $1->addArray( $2 ); }
2582	\| '(' type_ptr ')' array_dimension
2583	{ $$ = $2->addArray( $4 ); }
2584	\| '(' type_array ')' multi_array_dimension // redundant parenthesis
2585	{ $$ = $2->addArray( $4 ); }
2586	\| '(' type_array ')' // redundant parenthesis
2587	{ $$ = $2; }
2588	;
2589
2590	type_function:
2591	paren_type '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2592	{ $$ = $1->addParamList( $4 ); }
2593	\| '(' type_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2594	{ $$ = $2->addParamList( $6 ); }
2595	\| '(' type_function ')' // redundant parenthesis
2596	{ $$ = $2; }
2597	;
2598
2599	// This pattern parses a declaration for a parameter variable of a function prototype or actual that is not redefining a
2600	// typedef name and allows the C99 array options, which can only appear in a parameter list. The pattern precludes
2601	// declaring an array of functions versus a pointer to an array of functions, and returning arrays and functions versus
2602	// pointers to arrays and functions.
2603
2604	identifier_parameter_declarator:
2605	paren_identifier attribute_list_opt
2606	{ $$ = $1->addQualifiers( $2 ); }
2607	\| identifier_parameter_ptr
2608	\| identifier_parameter_array attribute_list_opt
2609	{ $$ = $1->addQualifiers( $2 ); }
2610	\| identifier_parameter_function attribute_list_opt
2611	{ $$ = $1->addQualifiers( $2 ); }
2612	;
2613
2614	identifier_parameter_ptr:
2615	ptrref_operator identifier_parameter_declarator
2616	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2617	\| ptrref_operator type_qualifier_list identifier_parameter_declarator
2618	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2619	\| '(' identifier_parameter_ptr ')' attribute_list_opt
2620	{ $$ = $2->addQualifiers( $4 ); }
2621	;
2622
2623	identifier_parameter_array:
2624	paren_identifier array_parameter_dimension
2625	{ $$ = $1->addArray( $2 ); }
2626	\| '(' identifier_parameter_ptr ')' array_dimension
2627	{ $$ = $2->addArray( $4 ); }
2628	\| '(' identifier_parameter_array ')' multi_array_dimension // redundant parenthesis
2629	{ $$ = $2->addArray( $4 ); }
2630	\| '(' identifier_parameter_array ')' // redundant parenthesis
2631	{ $$ = $2; }
2632	;
2633
2634	identifier_parameter_function:
2635	paren_identifier '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2636	{ $$ = $1->addParamList( $4 ); }
2637	\| '(' identifier_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2638	{ $$ = $2->addParamList( $6 ); }
2639	\| '(' identifier_parameter_function ')' // redundant parenthesis
2640	{ $$ = $2; }
2641	;
2642
2643	// This pattern parses a declaration for a parameter variable or function prototype that is redefining a typedef name,
2644	// e.g.:
2645	//
2646	// typedef int foo;
2647	// int f( int foo ); // redefine typedef name in new scope
2648	//
2649	// and allows the C99 array options, which can only appear in a parameter list.
2650
2651	type_parameter_redeclarator:
2652	typedef attribute_list_opt
2653	{ $$ = $1->addQualifiers( $2 ); }
2654	\| type_parameter_ptr
2655	\| type_parameter_array attribute_list_opt
2656	{ $$ = $1->addQualifiers( $2 ); }
2657	\| type_parameter_function attribute_list_opt
2658	{ $$ = $1->addQualifiers( $2 ); }
2659	;
2660
2661	typedef:
2662	TYPEDEFname
2663	{
2664	typedefTable.setNextIdentifier( *$1 );
2665	$$ = DeclarationNode::newName( $1 );
2666	}
2667	\| TYPEGENname
2668	{
2669	typedefTable.setNextIdentifier( *$1 );
2670	$$ = DeclarationNode::newName( $1 );
2671	}
2672	;
2673
2674	type_parameter_ptr:
2675	ptrref_operator type_parameter_redeclarator
2676	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2677	\| ptrref_operator type_qualifier_list type_parameter_redeclarator
2678	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2679	\| '(' type_parameter_ptr ')' attribute_list_opt
2680	{ $$ = $2->addQualifiers( $4 ); }
2681	;
2682
2683	type_parameter_array:
2684	typedef array_parameter_dimension
2685	{ $$ = $1->addArray( $2 ); }
2686	\| '(' type_parameter_ptr ')' array_parameter_dimension
2687	{ $$ = $2->addArray( $4 ); }
2688	;
2689
2690	type_parameter_function:
2691	typedef '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2692	{ $$ = $1->addParamList( $4 ); }
2693	\| '(' type_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2694	{ $$ = $2->addParamList( $6 ); }
2695	;
2696
2697	// This pattern parses a declaration of an abstract variable or function prototype, i.e., there is no identifier to
2698	// which the type applies, e.g.:
2699	//
2700	// sizeof( int );
2701	// sizeof( int * );
2702	// sizeof( int [10] );
2703	// sizeof( int (*)() );
2704	// sizeof( int () );
2705	//
2706	// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
2707	// and functions versus pointers to arrays and functions.
2708
2709	abstract_declarator:
2710	abstract_ptr
2711	\| abstract_array attribute_list_opt
2712	{ $$ = $1->addQualifiers( $2 ); }
2713	\| abstract_function attribute_list_opt
2714	{ $$ = $1->addQualifiers( $2 ); }
2715	;
2716
2717	abstract_ptr:
2718	ptrref_operator
2719	{ $$ = DeclarationNode::newPointer( 0 ); }
2720	\| ptrref_operator type_qualifier_list
2721	{ $$ = DeclarationNode::newPointer( $2 ); }
2722	\| ptrref_operator abstract_declarator
2723	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2724	\| ptrref_operator type_qualifier_list abstract_declarator
2725	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2726	\| '(' abstract_ptr ')' attribute_list_opt
2727	{ $$ = $2->addQualifiers( $4 ); }
2728	;
2729
2730	abstract_array:
2731	array_dimension
2732	\| '(' abstract_ptr ')' array_dimension
2733	{ $$ = $2->addArray( $4 ); }
2734	\| '(' abstract_array ')' multi_array_dimension // redundant parenthesis
2735	{ $$ = $2->addArray( $4 ); }
2736	\| '(' abstract_array ')' // redundant parenthesis
2737	{ $$ = $2; }
2738	;
2739
2740	abstract_function:
2741	'(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2742	{ $$ = DeclarationNode::newFunction( nullptr, nullptr, $3, nullptr ); }
2743	\| '(' abstract_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2744	{ $$ = $2->addParamList( $6 ); }
2745	\| '(' abstract_function ')' // redundant parenthesis
2746	{ $$ = $2; }
2747	;
2748
2749	array_dimension:
2750	// Only the first dimension can be empty.
2751	'[' ']'
2752	{ $$ = DeclarationNode::newArray( 0, 0, false ); }
2753	\| '[' ']' multi_array_dimension
2754	{ $$ = DeclarationNode::newArray( 0, 0, false )->addArray( $3 ); }
2755	\| multi_array_dimension
2756	;
2757
2758	multi_array_dimension:
2759	'[' push assignment_expression pop ']'
2760	{ $$ = DeclarationNode::newArray( $3, 0, false ); }
2761	\| '[' push '*' pop ']' // C99
2762	{ $$ = DeclarationNode::newVarArray( 0 ); }
2763	\| multi_array_dimension '[' push assignment_expression pop ']'
2764	{ $$ = $1->addArray( DeclarationNode::newArray( $4, 0, false ) ); }
2765	\| multi_array_dimension '[' push '*' pop ']' // C99
2766	{ $$ = $1->addArray( DeclarationNode::newVarArray( 0 ) ); }
2767	;
2768
2769	// This pattern parses a declaration of a parameter abstract variable or function prototype, i.e., there is no
2770	// identifier to which the type applies, e.g.:
2771	//
2772	// int f( int ); // not handled here
2773	// int f( int * ); // abstract function-prototype parameter; no parameter name specified
2774	// int f( int (*)() ); // abstract function-prototype parameter; no parameter name specified
2775	// int f( int (int) ); // abstract function-prototype parameter; no parameter name specified
2776	//
2777	// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
2778	// and functions versus pointers to arrays and functions. In addition, the pattern handles the
2779	// special meaning of parenthesis around a typedef name:
2780	//
2781	// ISO/IEC 9899:1999 Section 6.7.5.3(11) : "In a parameter declaration, a single typedef name in
2782	// parentheses is taken to be an abstract declarator that specifies a function with a single parameter,
2783	// not as redundant parentheses around the identifier."
2784	//
2785	// For example:
2786	//
2787	// typedef float T;
2788	// int f( int ( T [5] ) ); // see abstract_parameter_declarator
2789	// int g( int ( T ( int ) ) ); // see abstract_parameter_declarator
2790	// int f( int f1( T a[5] ) ); // see identifier_parameter_declarator
2791	// int g( int g1( T g2( int p ) ) ); // see identifier_parameter_declarator
2792	//
2793	// In essence, a '(' immediately to the left of typedef name, T, is interpreted as starting a parameter type list, and
2794	// not as redundant parentheses around a redeclaration of T. Finally, the pattern also precludes declaring an array of
2795	// functions versus a pointer to an array of functions, and returning arrays and functions versus pointers to arrays and
2796	// functions.
2797
2798	abstract_parameter_declarator:
2799	abstract_parameter_ptr
2800	\| abstract_parameter_array attribute_list_opt
2801	{ $$ = $1->addQualifiers( $2 ); }
2802	\| abstract_parameter_function attribute_list_opt
2803	{ $$ = $1->addQualifiers( $2 ); }
2804	;
2805
2806	abstract_parameter_ptr:
2807	ptrref_operator
2808	{ $$ = DeclarationNode::newPointer( nullptr ); }
2809	\| ptrref_operator type_qualifier_list
2810	{ $$ = DeclarationNode::newPointer( $2 ); }
2811	\| ptrref_operator abstract_parameter_declarator
2812	{ $$ = $2->addPointer( DeclarationNode::newPointer( nullptr ) ); }
2813	\| ptrref_operator type_qualifier_list abstract_parameter_declarator
2814	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2815	\| '(' abstract_parameter_ptr ')' attribute_list_opt
2816	{ $$ = $2->addQualifiers( $4 ); }
2817	;
2818
2819	abstract_parameter_array:
2820	array_parameter_dimension
2821	\| '(' abstract_parameter_ptr ')' array_parameter_dimension
2822	{ $$ = $2->addArray( $4 ); }
2823	\| '(' abstract_parameter_array ')' multi_array_dimension // redundant parenthesis
2824	{ $$ = $2->addArray( $4 ); }
2825	\| '(' abstract_parameter_array ')' // redundant parenthesis
2826	{ $$ = $2; }
2827	;
2828
2829	abstract_parameter_function:
2830	'(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2831	{ $$ = DeclarationNode::newFunction( nullptr, nullptr, $3, nullptr ); }
2832	\| '(' abstract_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2833	{ $$ = $2->addParamList( $6 ); }
2834	\| '(' abstract_parameter_function ')' // redundant parenthesis
2835	{ $$ = $2; }
2836	;
2837
2838	array_parameter_dimension:
2839	// Only the first dimension can be empty or have qualifiers.
2840	array_parameter_1st_dimension
2841	\| array_parameter_1st_dimension multi_array_dimension
2842	{ $$ = $1->addArray( $2 ); }
2843	\| multi_array_dimension
2844	;
2845
2846	// The declaration of an array parameter has additional syntax over arrays in normal variable declarations:
2847	//
2848	// ISO/IEC 9899:1999 Section 6.7.5.2(1) : "The optional type qualifiers and the keyword static shall appear only in
2849	// a declaration of a function parameter with an array type, and then only in the outermost array type derivation."
2850
2851	array_parameter_1st_dimension:
2852	'[' ']'
2853	{ $$ = DeclarationNode::newArray( 0, 0, false ); }
2854	// multi_array_dimension handles the '[' '*' ']' case
2855	\| '[' push type_qualifier_list '*' pop ']' // remaining C99
2856	{ $$ = DeclarationNode::newVarArray( $3 ); }
2857	\| '[' push type_qualifier_list pop ']'
2858	{ $$ = DeclarationNode::newArray( 0, $3, false ); }
2859	// multi_array_dimension handles the '[' assignment_expression ']' case
2860	\| '[' push type_qualifier_list assignment_expression pop ']'
2861	{ $$ = DeclarationNode::newArray( $4, $3, false ); }
2862	\| '[' push STATIC type_qualifier_list_opt assignment_expression pop ']'
2863	{ $$ = DeclarationNode::newArray( $5, $4, true ); }
2864	\| '[' push type_qualifier_list STATIC assignment_expression pop ']'
2865	{ $$ = DeclarationNode::newArray( $5, $3, true ); }
2866	;
2867
2868	// This pattern parses a declaration of an abstract variable, but does not allow "int ()" for a function pointer.
2869	//
2870	// struct S {
2871	// int;
2872	// int *;
2873	// int [10];
2874	// int (*)();
2875	// };
2876
2877	variable_abstract_declarator:
2878	variable_abstract_ptr
2879	\| variable_abstract_array attribute_list_opt
2880	{ $$ = $1->addQualifiers( $2 ); }
2881	\| variable_abstract_function attribute_list_opt
2882	{ $$ = $1->addQualifiers( $2 ); }
2883	;
2884
2885	variable_abstract_ptr:
2886	ptrref_operator
2887	{ $$ = DeclarationNode::newPointer( 0 ); }
2888	\| ptrref_operator type_qualifier_list
2889	{ $$ = DeclarationNode::newPointer( $2 ); }
2890	\| ptrref_operator variable_abstract_declarator
2891	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2892	\| ptrref_operator type_qualifier_list variable_abstract_declarator
2893	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2894	\| '(' variable_abstract_ptr ')' attribute_list_opt
2895	{ $$ = $2->addQualifiers( $4 ); }
2896	;
2897
2898	variable_abstract_array:
2899	array_dimension
2900	\| '(' variable_abstract_ptr ')' array_dimension
2901	{ $$ = $2->addArray( $4 ); }
2902	\| '(' variable_abstract_array ')' multi_array_dimension // redundant parenthesis
2903	{ $$ = $2->addArray( $4 ); }
2904	\| '(' variable_abstract_array ')' // redundant parenthesis
2905	{ $$ = $2; }
2906	;
2907
2908	variable_abstract_function:
2909	'(' variable_abstract_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2910	{ $$ = $2->addParamList( $6 ); }
2911	\| '(' variable_abstract_function ')' // redundant parenthesis
2912	{ $$ = $2; }
2913	;
2914
2915	// This pattern parses a new-style declaration for a parameter variable or function prototype that is either an
2916	// identifier or typedef name and allows the C99 array options, which can only appear in a parameter list.
2917
2918	cfa_identifier_parameter_declarator_tuple: // CFA
2919	cfa_identifier_parameter_declarator_no_tuple
2920	\| cfa_abstract_tuple
2921	\| type_qualifier_list cfa_abstract_tuple
2922	{ $$ = $2->addQualifiers( $1 ); }
2923	;
2924
2925	cfa_identifier_parameter_declarator_no_tuple: // CFA
2926	cfa_identifier_parameter_ptr
2927	\| cfa_identifier_parameter_array
2928	;
2929
2930	cfa_identifier_parameter_ptr: // CFA
2931	// No SUE declaration in parameter list.
2932	ptrref_operator type_specifier_nobody
2933	{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0 ) ); }
2934	\| type_qualifier_list ptrref_operator type_specifier_nobody
2935	{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1 ) ); }
2936	\| ptrref_operator cfa_abstract_function
2937	{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0 ) ); }
2938	\| type_qualifier_list ptrref_operator cfa_abstract_function
2939	{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1 ) ); }
2940	\| ptrref_operator cfa_identifier_parameter_declarator_tuple
2941	{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0 ) ); }
2942	\| type_qualifier_list ptrref_operator cfa_identifier_parameter_declarator_tuple
2943	{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1 ) ); }
2944	;
2945
2946	cfa_identifier_parameter_array: // CFA
2947	// Only the first dimension can be empty or have qualifiers. Empty dimension must be factored out due to
2948	// shift/reduce conflict with new-style empty (void) function return type.
2949	'[' ']' type_specifier_nobody
2950	{ $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
2951	\| cfa_array_parameter_1st_dimension type_specifier_nobody
2952	{ $$ = $2->addNewArray( $1 ); }
2953	\| '[' ']' multi_array_dimension type_specifier_nobody
2954	{ $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
2955	\| cfa_array_parameter_1st_dimension multi_array_dimension type_specifier_nobody
2956	{ $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
2957	\| multi_array_dimension type_specifier_nobody
2958	{ $$ = $2->addNewArray( $1 ); }
2959
2960	\| '[' ']' cfa_identifier_parameter_ptr
2961	{ $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
2962	\| cfa_array_parameter_1st_dimension cfa_identifier_parameter_ptr
2963	{ $$ = $2->addNewArray( $1 ); }
2964	\| '[' ']' multi_array_dimension cfa_identifier_parameter_ptr
2965	{ $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
2966	\| cfa_array_parameter_1st_dimension multi_array_dimension cfa_identifier_parameter_ptr
2967	{ $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
2968	\| multi_array_dimension cfa_identifier_parameter_ptr
2969	{ $$ = $2->addNewArray( $1 ); }
2970	;
2971
2972	cfa_array_parameter_1st_dimension:
2973	'[' push type_qualifier_list '*' pop ']' // remaining C99
2974	{ $$ = DeclarationNode::newVarArray( $3 ); }
2975	\| '[' push type_qualifier_list assignment_expression pop ']'
2976	{ $$ = DeclarationNode::newArray( $4, $3, false ); }
2977	\| '[' push declaration_qualifier_list assignment_expression pop ']'
2978	// declaration_qualifier_list must be used because of shift/reduce conflict with
2979	// assignment_expression, so a semantic check is necessary to preclude them as a type_qualifier cannot
2980	// appear in this context.
2981	{ $$ = DeclarationNode::newArray( $4, $3, true ); }
2982	\| '[' push declaration_qualifier_list type_qualifier_list assignment_expression pop ']'
2983	{ $$ = DeclarationNode::newArray( $5, $4->addQualifiers( $3 ), true ); }
2984	;
2985
2986	// This pattern parses a new-style declaration of an abstract variable or function prototype, i.e., there is no
2987	// identifier to which the type applies, e.g.:
2988	//
2989	// [int] f( int ); // abstract variable parameter; no parameter name specified
2990	// [int] f( [int] (int) ); // abstract function-prototype parameter; no parameter name specified
2991	//
2992	// These rules need LR(3):
2993	//
2994	// cfa_abstract_tuple identifier_or_type_name
2995	// '[' cfa_parameter_list ']' identifier_or_type_name '(' cfa_parameter_type_list_opt ')'
2996	//
2997	// since a function return type can be syntactically identical to a tuple type:
2998	//
2999	// [int, int] t;
3000	// [int, int] f( int );
3001	//
3002	// Therefore, it is necessary to look at the token after identifier_or_type_name to know when to reduce
3003	// cfa_abstract_tuple. To make this LR(1), several rules have to be flattened (lengthened) to allow the necessary
3004	// lookahead. To accomplish this, cfa_abstract_declarator has an entry point without tuple, and tuple declarations are
3005	// duplicated when appearing with cfa_function_specifier.
3006
3007	cfa_abstract_declarator_tuple: // CFA
3008	cfa_abstract_tuple
3009	\| type_qualifier_list cfa_abstract_tuple
3010	{ $$ = $2->addQualifiers( $1 ); }
3011	\| cfa_abstract_declarator_no_tuple
3012	;
3013
3014	cfa_abstract_declarator_no_tuple: // CFA
3015	cfa_abstract_ptr
3016	\| cfa_abstract_array
3017	;
3018
3019	cfa_abstract_ptr: // CFA
3020	ptrref_operator type_specifier
3021	{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0 ) ); }
3022	\| type_qualifier_list ptrref_operator type_specifier
3023	{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1 ) ); }
3024	\| ptrref_operator cfa_abstract_function
3025	{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0 ) ); }
3026	\| type_qualifier_list ptrref_operator cfa_abstract_function
3027	{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1 ) ); }
3028	\| ptrref_operator cfa_abstract_declarator_tuple
3029	{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0 ) ); }
3030	\| type_qualifier_list ptrref_operator cfa_abstract_declarator_tuple
3031	{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1 ) ); }
3032	;
3033
3034	cfa_abstract_array: // CFA
3035	// Only the first dimension can be empty. Empty dimension must be factored out due to shift/reduce conflict with
3036	// empty (void) function return type.
3037	'[' ']' type_specifier
3038	{ $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
3039	\| '[' ']' multi_array_dimension type_specifier
3040	{ $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
3041	\| multi_array_dimension type_specifier
3042	{ $$ = $2->addNewArray( $1 ); }
3043	\| '[' ']' cfa_abstract_ptr
3044	{ $$ = $3->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
3045	\| '[' ']' multi_array_dimension cfa_abstract_ptr
3046	{ $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( nullptr, nullptr, false ) ); }
3047	\| multi_array_dimension cfa_abstract_ptr
3048	{ $$ = $2->addNewArray( $1 ); }
3049	;
3050
3051	cfa_abstract_tuple: // CFA
3052	'[' push cfa_abstract_parameter_list pop ']'
3053	{ $$ = DeclarationNode::newTuple( $3 ); }
3054	;
3055
3056	cfa_abstract_function: // CFA
3057	// '[' ']' '(' cfa_parameter_type_list_opt ')'
3058	// { $$ = DeclarationNode::newFunction( nullptr, DeclarationNode::newTuple( nullptr ), $4, nullptr ); }
3059	cfa_abstract_tuple '(' push cfa_parameter_type_list_opt pop ')'
3060	{ $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
3061	\| cfa_function_return '(' push cfa_parameter_type_list_opt pop ')'
3062	{ $$ = DeclarationNode::newFunction( nullptr, $1, $4, nullptr ); }
3063	;
3064
3065	// 1) ISO/IEC 9899:1999 Section 6.7.2(2) : "At least one type specifier shall be given in the declaration specifiers in
3066	// each declaration, and in the specifier-qualifier list in each structure declaration and type name."
3067	//
3068	// 2) ISO/IEC 9899:1999 Section 6.11.5(1) : "The placement of a storage-class specifier other than at the beginning of
3069	// the declaration specifiers in a declaration is an obsolescent feature."
3070	//
3071	// 3) ISO/IEC 9899:1999 Section 6.11.6(1) : "The use of function declarators with empty parentheses (not
3072	// prototype-format parameter type declarators) is an obsolescent feature."
3073	//
3074	// 4) ISO/IEC 9899:1999 Section 6.11.7(1) : "The use of function definitions with separate parameter identifier and
3075	// declaration lists (not prototype-format parameter type and identifier declarators) is an obsolescent feature.
3076
3077	//*********************** MISCELLANEOUS ******************************
3078
3079	comma_opt: // redundant comma
3080	// empty
3081	\| ','
3082	;
3083
3084	default_initialize_opt:
3085	// empty
3086	{ $$ = nullptr; }
3087	\| '=' assignment_expression
3088	{ $$ = $2; }
3089	;
3090
3091	%%
3092	// ----end of grammar----
3093
3094	extern char *yytext;
3095
3096	void yyerror( const char * ) {
3097	cout << "Error ";
3098	if ( yyfilename ) {
3099	cout << "in file " << yyfilename << " ";
3100	} // if
3101	cout << "at line " << yylineno << " reading token \"" << (yytext[0] == '\0' ? "EOF" : yytext) << "\"" << endl;
3102	}
3103
3104	// Local Variables: //
3105	// mode: c++ //
3106	// tab-width: 4 //
3107	// compile-command: "make install" //
3108	// End: //

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