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Last change on this file since 917f93c5 was 4e06c1e, checked in by Peter A. Buhr <pabuhr@…>, 9 years ago
changes for switch and choose statements
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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	// cfa.y --
8	//
9	// Author : Peter A. Buhr
10	// Created On : Sat Sep 1 20:22:55 2001
11	// Last Modified By : Peter A. Buhr
12	// Last Modified On : Tue Jul 12 17:26:32 2016
13	// Update Count : 1659
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	extern char *yytext;
46
47	#undef __GNUC_MINOR__
48
49	#include <cstdio>
50	#include <stack>
51	#include "lex.h"
52	#include "parser.h"
53	#include "ParseNode.h"
54	#include "TypedefTable.h"
55	#include "TypeData.h"
56	#include "LinkageSpec.h"
57
58	DeclarationNode *theTree = 0; // the resulting parse tree
59	LinkageSpec::Type linkage = LinkageSpec::Cforall;
60	std::stack< LinkageSpec::Type > linkageStack;
61	TypedefTable typedefTable;
62	%}
63
64	//*********************** TERMINAL TOKENS ******************************
65
66	// keywords
67	%token TYPEDEF
68	%token AUTO EXTERN REGISTER STATIC
69	%token INLINE // C99
70	%token FORTRAN // C99, extension ISO/IEC 9899:1999 Section J.5.9(1)
71	%token CONST VOLATILE
72	%token RESTRICT // C99
73	%token FORALL LVALUE // CFA
74	%token VOID CHAR SHORT INT LONG FLOAT DOUBLE SIGNED UNSIGNED
75	%token VALIST // GCC
76	%token BOOL COMPLEX IMAGINARY // C99
77	%token TYPEOF LABEL // GCC
78	%token ENUM STRUCT UNION
79	%token OTYPE FTYPE DTYPE TRAIT // CFA
80	%token SIZEOF OFFSETOF
81	%token ATTRIBUTE EXTENSION // GCC
82	%token IF ELSE SWITCH CASE DEFAULT DO WHILE FOR BREAK CONTINUE GOTO RETURN
83	%token CHOOSE DISABLE ENABLE FALLTHRU TRY CATCH CATCHRESUME FINALLY THROW THROWRESUME AT // CFA
84	%token ASM // C99, extension ISO/IEC 9899:1999 Section J.5.10(1)
85	%token ALIGNAS ALIGNOF ATOMIC GENERIC NORETURN STATICASSERT THREADLOCAL // C11
86
87	// names and constants: lexer differentiates between identifier and typedef names
88	%token<tok> IDENTIFIER QUOTED_IDENTIFIER TYPEDEFname TYPEGENname
89	%token<tok> ATTR_IDENTIFIER ATTR_TYPEDEFname ATTR_TYPEGENname
90	%token<tok> INTEGERconstant FLOATINGconstant CHARACTERconstant STRINGliteral
91	%token<tok> ZERO ONE // CFA
92
93	// multi-character operators
94	%token ARROW // ->
95	%token ICR DECR // ++ --
96	%token LS RS // << >>
97	%token LE GE EQ NE // <= >= == !=
98	%token ANDAND OROR // && \|\|
99	%token ELLIPSIS // ...
100
101	%token MULTassign DIVassign MODassign // *= /= %=/
102	%token PLUSassign MINUSassign // += -=
103	%token LSassign RSassign // <<= >>=
104	%token ANDassign ERassign ORassign // &= ^= \|=
105
106	%token ATassign // @=
107
108	// Types declaration
109	%union
110	{
111	Token tok;
112	ParseNode *pn;
113	ExpressionNode *en;
114	DeclarationNode *decl;
115	DeclarationNode::Aggregate aggKey;
116	DeclarationNode::TypeClass tclass;
117	StatementNode *sn;
118	ConstantNode *constant;
119	LabelNode *label;
120	InitializerNode *in;
121	bool flag;
122	}
123
124	%type<tok> identifier no_01_identifier no_attr_identifier zero_one
125	%type<tok> identifier_or_type_name no_attr_identifier_or_type_name no_01_identifier_or_type_name
126	%type<constant> string_literal_list
127
128	// expressions
129	%type<constant> constant
130	%type<en> tuple tuple_expression_list
131	%type<en> ptrref_operator unary_operator assignment_operator
132	%type<en> primary_expression postfix_expression unary_expression
133	%type<en> cast_expression multiplicative_expression additive_expression shift_expression
134	%type<en> relational_expression equality_expression AND_expression exclusive_OR_expression
135	%type<en> inclusive_OR_expression logical_AND_expression logical_OR_expression conditional_expression
136	%type<en> constant_expression assignment_expression assignment_expression_opt
137	%type<en> comma_expression comma_expression_opt
138	%type<en> argument_expression_list argument_expression for_control_expression assignment_opt
139	%type<en> subrange
140	%type<en> asm_operands_opt asm_operands_list asm_operand
141	%type<label> label_list
142	%type<constant> asm_clobbers_list_opt
143	%type<flag> asm_volatile_opt
144
145	// statements
146	%type<sn> labeled_statement compound_statement expression_statement selection_statement
147	%type<sn> iteration_statement jump_statement exception_statement asm_statement
148	%type<sn> fall_through_opt fall_through
149	%type<sn> statement statement_list
150	%type<sn> block_item_list block_item
151	%type<sn> case_clause
152	%type<en> case_value case_value_list
153	%type<sn> case_label case_label_list
154	%type<sn> switch_clause_list_opt switch_clause_list choose_clause_list_opt choose_clause_list
155	%type<pn> handler_list handler_clause finally_clause
156
157	// declarations
158	%type<decl> abstract_array abstract_declarator abstract_function abstract_parameter_array
159	%type<decl> abstract_parameter_declaration abstract_parameter_declarator abstract_parameter_function
160	%type<decl> abstract_parameter_ptr abstract_ptr
161
162	%type<aggKey> aggregate_key
163	%type<decl> aggregate_name
164
165	%type<decl> array_dimension array_parameter_1st_dimension array_parameter_dimension multi_array_dimension
166
167	%type<decl> assertion assertion_list_opt
168
169	%type<en> bit_subrange_size_opt bit_subrange_size
170
171	%type<decl> basic_declaration_specifier basic_type_name basic_type_specifier direct_type_name indirect_type_name
172
173	%type<decl> trait_declaration trait_declaration_list trait_declaring_list trait_specifier
174
175	%type<decl> declaration declaration_list declaration_list_opt declaration_qualifier_list
176	%type<decl> declaration_specifier declarator declaring_list
177
178	%type<decl> elaborated_type_name
179
180	%type<decl> enumerator_list enum_name
181	%type<en> enumerator_value_opt
182
183	%type<decl> exception_declaration external_definition external_definition_list external_definition_list_opt
184
185	%type<decl> field_declaration field_declaration_list field_declarator field_declaring_list
186	%type<en> field field_list
187
188	%type<decl> external_function_definition function_definition function_array function_declarator function_no_ptr function_ptr
189
190	%type<decl> identifier_parameter_array identifier_parameter_declarator identifier_parameter_function
191	%type<decl> identifier_parameter_ptr identifier_list
192
193	%type<decl> new_abstract_array new_abstract_declarator_no_tuple new_abstract_declarator_tuple
194	%type<decl> new_abstract_function new_abstract_parameter_declaration new_abstract_parameter_list
195	%type<decl> new_abstract_ptr new_abstract_tuple
196
197	%type<decl> new_array_parameter_1st_dimension
198
199	%type<decl> new_trait_declaring_list new_declaration new_field_declaring_list
200	%type<decl> new_function_declaration new_function_return new_function_specifier
201
202	%type<decl> new_identifier_parameter_array new_identifier_parameter_declarator_no_tuple
203	%type<decl> new_identifier_parameter_declarator_tuple new_identifier_parameter_ptr
204
205	%type<decl> new_parameter_declaration new_parameter_list new_parameter_type_list new_parameter_type_list_opt
206
207	%type<decl> new_typedef_declaration new_variable_declaration new_variable_specifier
208
209	%type<decl> old_declaration old_declaration_list old_declaration_list_opt old_function_array
210	%type<decl> old_function_declarator old_function_no_ptr old_function_ptr
211
212	%type<decl> parameter_declaration parameter_list parameter_type_list
213	%type<decl> parameter_type_list_opt
214
215	%type<decl> paren_identifier paren_type
216
217	%type<decl> storage_class storage_class_name storage_class_list
218
219	%type<decl> sue_declaration_specifier sue_type_specifier
220
221	%type<tclass> type_class
222	%type<decl> type_declarator type_declarator_name type_declaring_list
223
224	%type<decl> typedef type_array typedef_declaration typedef_declaration_specifier typedef_expression
225	%type<decl> type_function type_parameter_array type_parameter_function type_parameter_ptr
226	%type<decl> type_parameter_redeclarator type_ptr variable_type_redeclarator typedef_type_specifier
227	%type<decl> typegen_declaration_specifier typegen_type_specifier typegen_name
228
229	%type<decl> type_name type_name_no_function
230	%type<decl> type_parameter type_parameter_list
231
232	%type<en> type_name_list
233
234	%type<decl> type_qualifier type_qualifier_name type_qualifier_list type_qualifier_list_opt type_specifier
235
236	%type<decl> variable_abstract_array variable_abstract_declarator variable_abstract_function
237	%type<decl> variable_abstract_ptr variable_array variable_declarator variable_function variable_ptr
238
239	%type<decl> attribute_list_opt attribute_list attribute
240
241	// initializers
242	%type<in> initializer initializer_list initializer_opt
243
244	// designators
245	%type<en> designator designator_list designation
246
247
248	// Handle single shift/reduce conflict for dangling else by shifting the ELSE token. For example, this string
249	// is ambiguous:
250	// .---------. matches IF '(' comma_expression ')' statement
251	// if ( C ) S1 else S2
252	// `-----------------' matches IF '(' comma_expression ')' statement ELSE statement */
253
254	%nonassoc THEN // rule precedence for IF '(' comma_expression ')' statement
255	%nonassoc ELSE // token precedence for start of else clause in IF statement
256
257	%start translation_unit // parse-tree root
258
259	%%
260	//*********************** Namespace Management ******************************
261
262	// The grammar in the ANSI C standard is not strictly context-free, since it relies upon the distinct terminal symbols
263	// "identifier" and "TYPEDEFname" that are lexically identical. While it is possible to write a purely context-free
264	// grammar, such a grammar would obscure the relationship between syntactic and semantic constructs. Hence, this
265	// grammar uses the ANSI style.
266	//
267	// Cforall compounds this problem by introducing type names local to the scope of a declaration (for instance, those
268	// introduced through "forall" qualifiers), and by introducing "type generators" -- parametrized types. This latter
269	// type name creates a third class of identifiers that must be distinguished by the scanner.
270	//
271	// Since the scanner cannot distinguish among the different classes of identifiers without some context information, it
272	// accesses a data structure (the TypedefTable) to allow classification of an identifier that it has just read.
273	// Semantic actions during the parser update this data structure when the class of identifiers change.
274	//
275	// Because the Cforall language is block-scoped, there is the possibility that an identifier can change its class in a
276	// local scope; it must revert to its original class at the end of the block. Since type names can be local to a
277	// particular declaration, each declaration is itself a scope. This requires distinguishing between type names that are
278	// local to the current declaration scope and those that persist past the end of the declaration (i.e., names defined in
279	// "typedef" or "type" declarations).
280	//
281	// The non-terminals "push" and "pop" derive the empty string; their only use is to denote the opening and closing of
282	// scopes. Every push must have a matching pop, although it is regrettable the matching pairs do not always occur
283	// within the same rule. These non-terminals may appear in more contexts than strictly necessary from a semantic point
284	// of view. Unfortunately, these extra rules are necessary to prevent parsing conflicts -- the parser may not have
285	// enough context and look-ahead information to decide whether a new scope is necessary, so the effect of these extra
286	// rules is to open a new scope unconditionally. As the grammar evolves, it may be neccesary to add or move around
287	// "push" and "pop" nonterminals to resolve conflicts of this sort.
288
289	push:
290	{
291	typedefTable.enterScope();
292	}
293	;
294
295	pop:
296	{
297	typedefTable.leaveScope();
298	}
299	;
300
301	//*********************** CONSTANTS ******************************
302
303	constant:
304	// ENUMERATIONconstant is not included here; it is treated as a variable with type "enumeration constant".
305	INTEGERconstant { $$ = makeConstant( ConstantNode::Integer, $1 ); }
306	\| FLOATINGconstant { $$ = makeConstant( ConstantNode::Float, $1 ); }
307	\| CHARACTERconstant { $$ = makeConstant( ConstantNode::Character, $1 ); }
308	;
309
310	identifier:
311	IDENTIFIER
312	\| ATTR_IDENTIFIER // CFA
313	\| zero_one // CFA
314	;
315
316	no_01_identifier:
317	IDENTIFIER
318	\| ATTR_IDENTIFIER // CFA
319	;
320
321	no_attr_identifier:
322	IDENTIFIER
323	\| zero_one // CFA
324	;
325
326	zero_one: // CFA
327	ZERO
328	\| ONE
329	;
330
331	string_literal_list: // juxtaposed strings are concatenated
332	STRINGliteral { $$ = makeConstantStr( ConstantNode::String, $1 ); }
333	\| string_literal_list STRINGliteral { $$ = $1->appendstr( $2 ); }
334	;
335
336	//*********************** EXPRESSIONS ******************************
337
338	primary_expression:
339	IDENTIFIER // typedef name cannot be used as a variable name
340	{ $$ = new VarRefNode( $1 ); }
341	\| zero_one
342	{ $$ = new VarRefNode( $1 ); }
343	\| '(' comma_expression ')'
344	{ $$ = $2; }
345	\| '(' compound_statement ')' // GCC, lambda expression
346	{ $$ = new ValofExprNode( $2 ); }
347	;
348
349	postfix_expression:
350	primary_expression
351	\| postfix_expression '[' push assignment_expression pop ']'
352	// CFA, comma_expression disallowed in this context because it results in a common user error: subscripting a
353	// matrix with x[i,j] instead of x[i][j]. While this change is not backwards compatible, there seems to be
354	// little advantage to this feature and many disadvantages. It is possible to write x[(i,j)] in CFA, which is
355	// equivalent to the old x[i,j].
356	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Index ), $1, $4 ); }
357	\| postfix_expression '(' argument_expression_list ')'
358	{ $$ = new CompositeExprNode( $1, $3 ); }
359	// ambiguity with .0 so space required after field-selection, e.g.
360	// struct S { int 0, 1; } s; s. 0 = 0; s. 1 = 1;
361	\| postfix_expression '.' no_attr_identifier
362	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::FieldSel ), $1, new VarRefNode( $3 )); }
363	\| postfix_expression '.' '[' push field_list pop ']' // CFA, tuple field selector
364	\| postfix_expression ARROW no_attr_identifier
365	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::PFieldSel ), $1, new VarRefNode( $3 )); }
366	\| postfix_expression ARROW '[' push field_list pop ']' // CFA, tuple field selector
367	\| postfix_expression ICR
368	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::IncrPost ), $1 ); }
369	\| postfix_expression DECR
370	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::DecrPost ), $1 ); }
371	\| '(' type_name_no_function ')' '{' initializer_list comma_opt '}' // C99
372	{ $$ = new CompoundLiteralNode( $2, new InitializerNode( $5, true ) ); }
373	\| postfix_expression '{' argument_expression_list '}' // CFA
374	{
375	Token fn; fn.str = new std::string( "?{}" ); // location undefined
376	$$ = new CompositeExprNode( new VarRefNode( fn ), (ExpressionNode *)( $1 )->set_link( $3 ) );
377	}
378	;
379
380	argument_expression_list:
381	argument_expression
382	\| argument_expression_list ',' argument_expression
383	{ $$ = (ExpressionNode *)( $1->set_link( $3 )); }
384	;
385
386	argument_expression:
387	// empty
388	{ $$ = 0; } // use default argument
389	\| assignment_expression
390	\| no_attr_identifier ':' assignment_expression
391	{ $$ = $3->set_argName( $1 ); }
392	// Only a list of no_attr_identifier_or_type_name is allowed in this context. However, there is insufficient
393	// look ahead to distinguish between this list of parameter names and a tuple, so the tuple form must be used
394	// with an appropriate semantic check.
395	\| '[' push assignment_expression pop ']' ':' assignment_expression
396	{ $$ = $7->set_argName( $3 ); }
397	\| '[' push assignment_expression ',' tuple_expression_list pop ']' ':' assignment_expression
398	{ $$ = $9->set_argName( new CompositeExprNode( new OperatorNode( OperatorNode::TupleC ), (ExpressionNode *)$3->set_link( flattenCommas( $5 )))); }
399	;
400
401	field_list: // CFA, tuple field selector
402	field
403	\| field_list ',' field { $$ = (ExpressionNode *)$1->set_link( $3 ); }
404	;
405
406	field: // CFA, tuple field selector
407	no_attr_identifier
408	{ $$ = new VarRefNode( $1 ); }
409	// ambiguity with .0 so space required after field-selection, e.g.
410	// struct S { int 0, 1; } s; s. 0 = 0; s. 1 = 1;
411	\| no_attr_identifier '.' field
412	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::FieldSel ), new VarRefNode( $1 ), $3 ); }
413	\| no_attr_identifier '.' '[' push field_list pop ']'
414	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::FieldSel ), new VarRefNode( $1 ), $5 ); }
415	\| no_attr_identifier ARROW field
416	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::PFieldSel ), new VarRefNode( $1 ), $3 ); }
417	\| no_attr_identifier ARROW '[' push field_list pop ']'
418	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::PFieldSel ), new VarRefNode( $1 ), $5 ); }
419	;
420
421	unary_expression:
422	postfix_expression
423	// first location where constant/string can have operator applied: sizeof 3/sizeof "abc" still requires
424	// semantics checks, e.g., ++3, 3--, *3, &&3
425	\| constant
426	{ $$ = $1; }
427	\| string_literal_list
428	{ $$ = $1; }
429	\| EXTENSION cast_expression // GCC
430	{ $$ = $2->set_extension( true ); }
431	\| ptrref_operator cast_expression // CFA
432	{ $$ = new CompositeExprNode( $1, $2 ); }
433	// '*' ('&') is separated from unary_operator because of shift/reduce conflict in:
434	// { * X; } // dereference X
435	// { * int X; } // CFA declaration of pointer to int
436	\| unary_operator cast_expression
437	{ $$ = new CompositeExprNode( $1, $2 ); }
438	\| ICR unary_expression
439	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Incr ), $2 ); }
440	\| DECR unary_expression
441	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Decr ), $2 ); }
442	\| SIZEOF unary_expression
443	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::SizeOf ), $2 ); }
444	\| SIZEOF '(' type_name_no_function ')'
445	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::SizeOf ), new TypeValueNode( $3 )); }
446	\| OFFSETOF '(' type_name_no_function ',' no_attr_identifier ')'
447	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::OffsetOf ), new TypeValueNode( $3 ), new VarRefNode( $5 )); }
448	\| ATTR_IDENTIFIER
449	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Attr ), new VarRefNode( $1 )); }
450	\| ATTR_IDENTIFIER '(' type_name ')'
451	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Attr ), new VarRefNode( $1 ), new TypeValueNode( $3 )); }
452	\| ATTR_IDENTIFIER '(' argument_expression ')'
453	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Attr ), new VarRefNode( $1 ), $3 ); }
454	\| ALIGNOF unary_expression // GCC, variable alignment
455	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::AlignOf ), $2 ); }
456	\| ALIGNOF '(' type_name_no_function ')' // GCC, type alignment
457	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::AlignOf ), new TypeValueNode( $3 ) ); }
458	// \| ANDAND IDENTIFIER // GCC, address of label
459	// { $$ = new CompositeExprNode( new OperatorNode( OperatorNode::LabelAddress ), new VarRefNode( $2, true ) ); }
460	;
461
462	ptrref_operator:
463	'*' { $$ = new OperatorNode( OperatorNode::PointTo ); }
464	\| '&' { $$ = new OperatorNode( OperatorNode::AddressOf ); }
465	// GCC, address of label must be handled by semantic check for ref,ref,label
466	\| ANDAND { $$ = new OperatorNode( OperatorNode::And ); }
467	;
468
469	unary_operator:
470	'+' { $$ = new OperatorNode( OperatorNode::UnPlus ); }
471	\| '-' { $$ = new OperatorNode( OperatorNode::UnMinus ); }
472	\| '!' { $$ = new OperatorNode( OperatorNode::Neg ); }
473	\| '~' { $$ = new OperatorNode( OperatorNode::BitNeg ); }
474	;
475
476	cast_expression:
477	unary_expression
478	\| '(' type_name_no_function ')' cast_expression
479	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Cast ), new TypeValueNode( $2 ), $4 ); }
480	\| '(' type_name_no_function ')' tuple
481	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Cast ), new TypeValueNode( $2 ), $4 ); }
482	;
483
484	multiplicative_expression:
485	cast_expression
486	\| multiplicative_expression '*' cast_expression
487	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Mul ), $1, $3 ); }
488	\| multiplicative_expression '/' cast_expression
489	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Div ), $1, $3 ); }
490	\| multiplicative_expression '%' cast_expression
491	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Mod ), $1, $3 ); }
492	;
493
494	additive_expression:
495	multiplicative_expression
496	\| additive_expression '+' multiplicative_expression
497	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Plus ), $1, $3 ); }
498	\| additive_expression '-' multiplicative_expression
499	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Minus ), $1, $3 ); }
500	;
501
502	shift_expression:
503	additive_expression
504	\| shift_expression LS additive_expression
505	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::LShift ), $1, $3 ); }
506	\| shift_expression RS additive_expression
507	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::RShift ), $1, $3 ); }
508	;
509
510	relational_expression:
511	shift_expression
512	\| relational_expression '<' shift_expression
513	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::LThan ), $1, $3 ); }
514	\| relational_expression '>' shift_expression
515	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::GThan ), $1, $3 ); }
516	\| relational_expression LE shift_expression
517	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::LEThan ), $1, $3 ); }
518	\| relational_expression GE shift_expression
519	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::GEThan ), $1, $3 ); }
520	;
521
522	equality_expression:
523	relational_expression
524	\| equality_expression EQ relational_expression
525	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Eq ), $1, $3 ); }
526	\| equality_expression NE relational_expression
527	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Neq ), $1, $3 ); }
528	;
529
530	AND_expression:
531	equality_expression
532	\| AND_expression '&' equality_expression
533	{ $$ =new CompositeExprNode( new OperatorNode( OperatorNode::BitAnd ), $1, $3 ); }
534	;
535
536	exclusive_OR_expression:
537	AND_expression
538	\| exclusive_OR_expression '^' AND_expression
539	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Xor ), $1, $3 ); }
540	;
541
542	inclusive_OR_expression:
543	exclusive_OR_expression
544	\| inclusive_OR_expression '\|' exclusive_OR_expression
545	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::BitOr ), $1, $3 ); }
546	;
547
548	logical_AND_expression:
549	inclusive_OR_expression
550	\| logical_AND_expression ANDAND inclusive_OR_expression
551	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::And ), $1, $3 ); }
552	;
553
554	logical_OR_expression:
555	logical_AND_expression
556	\| logical_OR_expression OROR logical_AND_expression
557	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Or ), $1, $3 ); }
558	;
559
560	conditional_expression:
561	logical_OR_expression
562	\| logical_OR_expression '?' comma_expression ':' conditional_expression
563	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Cond ), (ExpressionNode )mkList( ($1, $3, $5 ) ) ); }
564	\| logical_OR_expression '?' /* empty */ ':' conditional_expression // GCC, omitted first operand
565	{ $$=new CompositeExprNode( new OperatorNode( OperatorNode::NCond ), $1, $4 ); }
566	\| logical_OR_expression '?' comma_expression ':' tuple // CFA, tuple expression
567	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Cond ), (ExpressionNode )mkList( ($1, $3, $5 ) ) ); }
568	;
569
570	constant_expression:
571	conditional_expression
572	;
573
574	assignment_expression:
575	// CFA, assignment is separated from assignment_operator to ensure no assignment operations for tuples
576	conditional_expression
577	\| unary_expression '=' assignment_expression
578	{ $$ =new CompositeExprNode( new OperatorNode( OperatorNode::Assign ), $1, $3 ); }
579	\| unary_expression assignment_operator assignment_expression
580	{ $$ =new CompositeExprNode( $2, $1, $3 ); }
581	\| tuple assignment_opt // CFA, tuple expression
582	{ $$ = ( $2 == 0 ) ? $1 : new CompositeExprNode( new OperatorNode( OperatorNode::Assign ), $1, $2 ); }
583	;
584
585	assignment_expression_opt:
586	// empty
587	{ $$ = new NullExprNode; }
588	\| assignment_expression
589	;
590
591	tuple: // CFA, tuple
592	// CFA, one assignment_expression is factored out of comma_expression to eliminate a shift/reduce conflict with
593	// comma_expression in new_identifier_parameter_array and new_abstract_array
594	'[' ']'
595	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::TupleC ) ); }
596	\| '[' push assignment_expression pop ']'
597	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::TupleC ), $3 ); }
598	\| '[' push ',' tuple_expression_list pop ']'
599	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::TupleC ), (ExpressionNode *)(new NullExprNode)->set_link( $4 ) ); }
600	\| '[' push assignment_expression ',' tuple_expression_list pop ']'
601	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::TupleC ), (ExpressionNode *)$3->set_link( flattenCommas( $5 ) ) ); }
602	;
603
604	tuple_expression_list:
605	assignment_expression_opt
606	\| tuple_expression_list ',' assignment_expression_opt
607	{ $$ = (ExpressionNode *)$1->set_link( $3 ); }
608	;
609
610	assignment_operator:
611	MULTassign { $$ = new OperatorNode( OperatorNode::MulAssn ); }
612	\| DIVassign { $$ = new OperatorNode( OperatorNode::DivAssn ); }
613	\| MODassign { $$ = new OperatorNode( OperatorNode::ModAssn ); }
614	\| PLUSassign { $$ = new OperatorNode( OperatorNode::PlusAssn ); }
615	\| MINUSassign { $$ = new OperatorNode( OperatorNode::MinusAssn ); }
616	\| LSassign { $$ = new OperatorNode( OperatorNode::LSAssn ); }
617	\| RSassign { $$ = new OperatorNode( OperatorNode::RSAssn ); }
618	\| ANDassign { $$ = new OperatorNode( OperatorNode::AndAssn ); }
619	\| ERassign { $$ = new OperatorNode( OperatorNode::ERAssn ); }
620	\| ORassign { $$ = new OperatorNode( OperatorNode::OrAssn ); }
621	;
622
623	comma_expression:
624	assignment_expression
625	\| comma_expression ',' assignment_expression // { $$ = (ExpressionNode *)$1->add_to_list( $3 ); }
626	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Comma ), $1, $3 ); }
627	;
628
629	comma_expression_opt:
630	// empty
631	{ $$ = 0; }
632	\| comma_expression
633	;
634
635	//************************* STATEMENTS *****************************
636
637	statement:
638	labeled_statement
639	\| compound_statement
640	\| expression_statement { $$ = $1; }
641	\| selection_statement
642	\| iteration_statement
643	\| jump_statement
644	\| exception_statement
645	\| asm_statement
646	\| '^' postfix_expression '{' argument_expression_list '}' ';' // CFA
647	{
648	Token fn; fn.str = new std::string( "^?{}" ); // location undefined
649	$$ = new StatementNode( StatementNode::Exp, new CompositeExprNode( new VarRefNode( fn ),
650	(ExpressionNode *)( $2 )->set_link( $4 ) ), 0 );
651	}
652	;
653
654	labeled_statement:
655	// labels cannot be identifiers 0 or 1
656	IDENTIFIER ':' attribute_list_opt statement
657	{
658	$$ = $4->add_label( $1 );
659	}
660	;
661
662	compound_statement:
663	'{' '}'
664	{ $$ = new CompoundStmtNode( (StatementNode *)0 ); }
665	\| '{'
666	// Two scopes are necessary because the block itself has a scope, but every declaration within the block also
667	// requires its own scope
668	push push
669	local_label_declaration_opt // GCC, local labels
670	block_item_list pop '}' // C99, intermix declarations and statements
671	{ $$ = new CompoundStmtNode( $5 ); }
672	;
673
674	block_item_list: // C99
675	block_item
676	\| block_item_list push block_item
677	{ if ( $1 != 0 ) { $1->set_link( $3 ); $$ = $1; } }
678	;
679
680	block_item:
681	declaration // CFA, new & old style declarations
682	{ $$ = new StatementNode( $1 ); }
683	\| EXTENSION declaration // GCC
684	{ // mark all fields in list
685	for ( DeclarationNode iter = $2; iter != NULL; iter = (DeclarationNode )iter->get_link() )
686	iter->set_extension( true );
687	$$ = new StatementNode( $2 );
688	}
689	\| function_definition
690	{ $$ = new StatementNode( $1 ); }
691	\| statement pop
692	;
693
694	statement_list:
695	statement
696	\| statement_list statement
697	{ if ( $1 != 0 ) { $1->set_link( $2 ); $$ = $1; } }
698	;
699
700	expression_statement:
701	comma_expression_opt ';'
702	{ $$ = new StatementNode( StatementNode::Exp, $1, 0 ); }
703	;
704
705	selection_statement:
706	IF '(' comma_expression ')' statement %prec THEN
707	// explicitly deal with the shift/reduce conflict on if/else
708	{ $$ = new StatementNode( StatementNode::If, $3, $5 ); }
709	\| IF '(' comma_expression ')' statement ELSE statement
710	{ $$ = new StatementNode( StatementNode::If, $3, (StatementNode )mkList(($5, *$7 )) ); }
711	\| SWITCH '(' comma_expression ')' case_clause // CFA
712	{ $$ = new StatementNode( StatementNode::Switch, $3, $5 ); }
713	\| SWITCH '(' comma_expression ')' '{' push declaration_list_opt switch_clause_list_opt '}' // CFA
714	{
715	StatementNode *sw = new StatementNode( StatementNode::Switch, $3, $8 );
716	// The semantics of the declaration list is changed to include associated initialization, which is performed
717	// before the transfer to the appropriate case clause by hoisting the declarations into a compound
718	// statement around the switch. Statements after the initial declaration list can never be executed, and
719	// therefore, are removed from the grammar even though C allows it. Change also applies to choose statement.
720	$$ = $7 != 0 ? new CompoundStmtNode( (StatementNode *)((new StatementNode( $7 ))->set_link( sw )) ) : sw;
721	}
722	\| CHOOSE '(' comma_expression ')' case_clause // CFA
723	{ $$ = new StatementNode( StatementNode::Switch, $3, $5 ); }
724	\| CHOOSE '(' comma_expression ')' '{' push declaration_list_opt choose_clause_list_opt '}' // CFA
725	{
726	StatementNode *sw = new StatementNode( StatementNode::Switch, $3, $8 );
727	$$ = $7 != 0 ? new CompoundStmtNode( (StatementNode *)((new StatementNode( $7 ))->set_link( sw )) ) : sw;
728	}
729	;
730
731	// CASE and DEFAULT clauses are only allowed in the SWITCH statement, precluding Duff's device. In addition, a case
732	// clause allows a list of values and subranges.
733
734	case_value: // CFA
735	constant_expression { $$ = $1; }
736	\| constant_expression ELLIPSIS constant_expression // GCC, subrange
737	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Range ), $1, $3 ); }
738	\| subrange // CFA, subrange
739	;
740
741	case_value_list: // CFA
742	case_value
743	\| case_value_list ',' case_value
744	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::TupleC ), (ExpressionNode *)(tupleContents( $1 ))->set_link( $3 ) ); }
745	;
746
747	case_label: // CFA
748	CASE case_value_list ':' { $$ = new StatementNode( StatementNode::Case, $2, 0 ); }
749	\| DEFAULT ':' { $$ = new StatementNode( StatementNode::Default ); }
750	// A semantic check is required to ensure only one default clause per switch/choose statement.
751	;
752
753	case_label_list: // CFA
754	case_label
755	\| case_label_list case_label { $$ = (StatementNode *)( $1->set_link( $2 )); }
756	;
757
758	case_clause: // CFA
759	case_label_list statement { $$ = $1->append_last_case( new CompoundStmtNode( $2 ) ); }
760	;
761
762	switch_clause_list_opt: // CFA
763	// empty
764	{ $$ = 0; }
765	\| switch_clause_list
766	;
767
768	switch_clause_list: // CFA
769	case_label_list statement_list
770	{ $$ = $1->append_last_case( new CompoundStmtNode( $2 ) ); }
771	\| switch_clause_list case_label_list statement_list
772	{ $$ = (StatementNode *)( $1->set_link( $2->append_last_case( new CompoundStmtNode( $3 ) ) ) ); }
773	;
774
775	choose_clause_list_opt: // CFA
776	// empty
777	{ $$ = 0; }
778	\| choose_clause_list
779	;
780
781	choose_clause_list: // CFA
782	case_label_list fall_through
783	{ $$ = $1->append_last_case( $2 ); }
784	\| case_label_list statement_list fall_through_opt
785	{ $$ = $1->append_last_case( new CompoundStmtNode( (StatementNode )mkList( ($2, *$3 ) ) ) ); }
786	\| choose_clause_list case_label_list fall_through
787	{ $$ = (StatementNode *)( $1->set_link( $2->append_last_case( $3 ))); }
788	\| choose_clause_list case_label_list statement_list fall_through_opt
789	{ $$ = (StatementNode )( $1->set_link( $2->append_last_case( new CompoundStmtNode( (StatementNode )mkList( ($3, $4 ) ) ) ) ) ); }
790	;
791
792	fall_through_opt: // CFA
793	// empty
794	{ $$ = new StatementNode( StatementNode::Break ); } // insert implicit break
795	\| fall_through
796	;
797
798	fall_through: // CFA
799	FALLTHRU
800	{ $$ = 0; }
801	\| FALLTHRU ';'
802	{ $$ = 0; }
803	;
804
805	iteration_statement:
806	WHILE '(' comma_expression ')' statement
807	{ $$ = new StatementNode( StatementNode::While, $3, $5 ); }
808	\| DO statement WHILE '(' comma_expression ')' ';'
809	{ $$ = new StatementNode( StatementNode::Do, $5, $2 ); }
810	\| FOR '(' push for_control_expression ')' statement
811	{ $$ = new StatementNode( StatementNode::For, $4, $6 ); }
812	;
813
814	for_control_expression:
815	comma_expression_opt pop ';' comma_expression_opt ';' comma_expression_opt
816	{ $$ = new ForCtlExprNode( $1, $4, $6 ); }
817	\| declaration comma_expression_opt ';' comma_expression_opt // C99
818	{ $$ = new ForCtlExprNode( $1, $2, $4 ); }
819	;
820
821	jump_statement:
822	GOTO IDENTIFIER ';'
823	{ $$ = new StatementNode( StatementNode::Goto, $2 ); }
824	\| GOTO '*' comma_expression ';' // GCC, computed goto
825	// The syntax for the GCC computed goto violates normal expression precedence, e.g., goto i+3; => goto (i+3);
826	// whereas normal operator precedence yields goto (*i)+3;
827	{ $$ = new StatementNode( StatementNode::Goto, $3 ); }
828	\| CONTINUE ';'
829	// A semantic check is required to ensure this statement appears only in the body of an iteration statement.
830	{ $$ = new StatementNode( StatementNode::Continue ); }
831	\| CONTINUE IDENTIFIER ';' // CFA, multi-level continue
832	// A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
833	// the target of the transfer appears only at the start of an iteration statement.
834	{ $$ = new StatementNode( StatementNode::Continue, $2 ); }
835	\| BREAK ';'
836	// A semantic check is required to ensure this statement appears only in the body of an iteration statement.
837	{ $$ = new StatementNode( StatementNode::Break ); }
838	\| BREAK IDENTIFIER ';' // CFA, multi-level exit
839	// A semantic check is required to ensure this statement appears only in the body of an iteration statement, and
840	// the target of the transfer appears only at the start of an iteration statement.
841	{ $$ = new StatementNode( StatementNode::Break, $2 ); }
842	\| RETURN comma_expression_opt ';'
843	{ $$ = new StatementNode( StatementNode::Return, $2, 0 ); }
844	\| THROW assignment_expression_opt ';'
845	{ $$ = new StatementNode( StatementNode::Throw, $2, 0 ); }
846	// \| THROW ';'
847	// { $$ = new StatementNode( StatementNode::Throw ); }
848	\| THROWRESUME assignment_expression_opt ';'
849	{ $$ = new StatementNode( StatementNode::Throw, $2, 0 ); }
850	\| THROWRESUME assignment_expression_opt AT assignment_expression ';'
851	{ $$ = new StatementNode( StatementNode::Throw, $2, 0 ); }
852	// \| THROWRESUME ';'
853	// { $$ = new StatementNode( StatementNode::Throw ); }
854	;
855
856	exception_statement:
857	TRY compound_statement handler_list
858	{ $$ = new StatementNode( StatementNode::Try, 0,(StatementNode )(mkList(($2,*$3 )))); }
859	\| TRY compound_statement finally_clause
860	{ $$ = new StatementNode( StatementNode::Try, 0,(StatementNode )(mkList(($2,*$3 )))); }
861	\| TRY compound_statement handler_list finally_clause
862	{
863	$3->set_link( $4 );
864	$$ = new StatementNode( StatementNode::Try, 0,(StatementNode )(mkList(($2,*$3 ))));
865	}
866	;
867
868	handler_list:
869	// There must be at least one catch clause
870	handler_clause
871	// ISO/IEC 9899:1999 Section 15.3(6 ) If present, a "..." handler shall be the last handler for its try block.
872	\| CATCH '(' ELLIPSIS ')' compound_statement
873	{ $$ = StatementNode::newCatchStmt( 0, $5, true ); }
874	\| handler_clause CATCH '(' ELLIPSIS ')' compound_statement
875	{ $$ = $1->set_link( StatementNode::newCatchStmt( 0, $6, true ) ); }
876	\| CATCHRESUME '(' ELLIPSIS ')' compound_statement
877	{ $$ = StatementNode::newCatchStmt( 0, $5, true ); }
878	\| handler_clause CATCHRESUME '(' ELLIPSIS ')' compound_statement
879	{ $$ = $1->set_link( StatementNode::newCatchStmt( 0, $6, true ) ); }
880	;
881
882	handler_clause:
883	CATCH '(' push push exception_declaration pop ')' compound_statement pop
884	{ $$ = StatementNode::newCatchStmt( $5, $8 ); }
885	\| handler_clause CATCH '(' push push exception_declaration pop ')' compound_statement pop
886	{ $$ = $1->set_link( StatementNode::newCatchStmt( $6, $9 ) ); }
887	\| CATCHRESUME '(' push push exception_declaration pop ')' compound_statement pop
888	{ $$ = StatementNode::newCatchStmt( $5, $8 ); }
889	\| handler_clause CATCHRESUME '(' push push exception_declaration pop ')' compound_statement pop
890	{ $$ = $1->set_link( StatementNode::newCatchStmt( $6, $9 ) ); }
891	;
892
893	finally_clause:
894	FINALLY compound_statement
895	{
896	$$ = new StatementNode( StatementNode::Finally, 0, $2 );
897	std::cout << "Just created a finally node" << std::endl;
898	}
899	;
900
901	exception_declaration:
902	// A semantic check is required to ensure type_specifier does not create a new type, e.g.:
903	//
904	// catch ( struct { int i; } x ) ...
905	//
906	// This new type cannot catch any thrown type because of name equivalence among types.
907	type_specifier
908	\| type_specifier declarator
909	{
910	typedefTable.addToEnclosingScope( TypedefTable::ID );
911	$$ = $2->addType( $1 );
912	}
913	\| type_specifier variable_abstract_declarator
914	{ $$ = $2->addType( $1 ); }
915	\| new_abstract_declarator_tuple no_attr_identifier // CFA
916	{
917	typedefTable.addToEnclosingScope( TypedefTable::ID );
918	$$ = $1->addName( $2 );
919	}
920	\| new_abstract_declarator_tuple // CFA
921	;
922
923	asm_statement:
924	ASM asm_volatile_opt '(' string_literal_list ')' ';'
925	{ $$ = new AsmStmtNode( StatementNode::Asm, $2, $4, 0 ); }
926	\| ASM asm_volatile_opt '(' string_literal_list ':' asm_operands_opt ')' ';' // remaining GCC
927	{ $$ = new AsmStmtNode( StatementNode::Asm, $2, $4, $6 ); }
928	\| ASM asm_volatile_opt '(' string_literal_list ':' asm_operands_opt ':' asm_operands_opt ')' ';'
929	{ $$ = new AsmStmtNode( StatementNode::Asm, $2, $4, $6, $8 ); }
930	\| ASM asm_volatile_opt '(' string_literal_list ':' asm_operands_opt ':' asm_operands_opt ':' asm_clobbers_list_opt ')' ';'
931	{ $$ = new AsmStmtNode( StatementNode::Asm, $2, $4, $6, $8, $10 ); }
932	\| ASM asm_volatile_opt GOTO '(' string_literal_list ':' ':' asm_operands_opt ':' asm_clobbers_list_opt ':' label_list ')' ';'
933	{ $$ = new AsmStmtNode( StatementNode::Asm, $2, $5, 0, $8, $10, $12 ); }
934	;
935
936	asm_volatile_opt: // GCC
937	// empty
938	{ $$ = false; }
939	\| VOLATILE
940	{ $$ = true; }
941	;
942
943	asm_operands_opt: // GCC
944	// empty
945	{ $$ = 0; } // use default argument
946	\| asm_operands_list
947	;
948
949	asm_operands_list: // GCC
950	asm_operand
951	\| asm_operands_list ',' asm_operand
952	{ $$ = (ExpressionNode *)$1->set_link( $3 ); }
953	;
954
955	asm_operand: // GCC
956	string_literal_list '(' constant_expression ')'
957	{ $$ = new AsmExprNode( 0, $1, $3 ); }
958	\| '[' constant_expression ']' string_literal_list '(' constant_expression ')'
959	{ $$ = new AsmExprNode( $2, $4, $6 ); }
960	;
961
962	asm_clobbers_list_opt: // GCC
963	// empty
964	{ $$ = 0; } // use default argument
965	\| string_literal_list
966	{ $$ = $1; }
967	\| asm_clobbers_list_opt ',' string_literal_list
968	{ $$ = (ConstantNode *)$1->set_link( $3 ); }
969	;
970
971	label_list:
972	no_attr_identifier
973	{ $$ = new LabelNode(); $$->append_label( $1 ); }
974	\| label_list ',' no_attr_identifier
975	{ $$ = $1; $1->append_label( $3 ); }
976	;
977
978	//***************************** DECLARATIONS *******************************
979
980	declaration_list_opt: // used at beginning of switch statement
981	pop
982	{ $$ = 0; }
983	\| declaration_list
984	;
985
986	declaration_list:
987	declaration
988	\| declaration_list push declaration
989	{ $$ = $1->appendList( $3 ); }
990	;
991
992	old_declaration_list_opt: // used to declare parameter types in K&R style functions
993	pop
994	{ $$ = 0; }
995	\| old_declaration_list
996	;
997
998	old_declaration_list:
999	old_declaration
1000	\| old_declaration_list push old_declaration
1001	{ $$ = $1->appendList( $3 ); }
1002	;
1003
1004	local_label_declaration_opt: // GCC, local label
1005	// empty
1006	\| local_label_declaration_list
1007	;
1008
1009	local_label_declaration_list: // GCC, local label
1010	LABEL local_label_list ';'
1011	\| local_label_declaration_list LABEL local_label_list ';'
1012	;
1013
1014	local_label_list: // GCC, local label
1015	no_attr_identifier_or_type_name {}
1016	\| local_label_list ',' no_attr_identifier_or_type_name {}
1017	;
1018
1019	declaration: // CFA, new & old style declarations
1020	new_declaration
1021	\| old_declaration
1022	;
1023
1024	// C declaration syntax is notoriously confusing and error prone. Cforall provides its own type, variable and function
1025	// declarations. CFA declarations use the same declaration tokens as in C; however, CFA places declaration modifiers to
1026	// the left of the base type, while C declarations place modifiers to the right of the base type. CFA declaration
1027	// modifiers are interpreted from left to right and the entire type specification is distributed across all variables in
1028	// the declaration list (as in Pascal). ANSI C and the new CFA declarations may appear together in the same program
1029	// block, but cannot be mixed within a specific declaration.
1030	//
1031	// CFA C
1032	// [10] int x; int x[10]; // array of 10 integers
1033	// [10] * char y; char *y[10]; // array of 10 pointers to char
1034
1035	new_declaration: // CFA
1036	new_variable_declaration pop ';'
1037	\| new_typedef_declaration pop ';'
1038	\| new_function_declaration pop ';'
1039	\| type_declaring_list pop ';'
1040	\| trait_specifier pop ';'
1041	;
1042
1043	new_variable_declaration: // CFA
1044	new_variable_specifier initializer_opt
1045	{
1046	typedefTable.addToEnclosingScope( TypedefTable::ID );
1047	$$ = $1->addInitializer( $2 );
1048	}
1049	\| declaration_qualifier_list new_variable_specifier initializer_opt
1050	// declaration_qualifier_list also includes type_qualifier_list, so a semantic check is necessary to preclude
1051	// them as a type_qualifier cannot appear in that context.
1052	{
1053	typedefTable.addToEnclosingScope( TypedefTable::ID );
1054	$$ = $2->addQualifiers( $1 )->addInitializer( $3 );;
1055	}
1056	\| new_variable_declaration pop ',' push identifier_or_type_name initializer_opt
1057	{
1058	typedefTable.addToEnclosingScope( *$5, TypedefTable::ID );
1059	$$ = $1->appendList( $1->cloneType( $5 )->addInitializer( $6 ) );
1060	}
1061	;
1062
1063	new_variable_specifier: // CFA
1064	// A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
1065	// storage-class
1066	new_abstract_declarator_no_tuple identifier_or_type_name asm_name_opt
1067	{
1068	typedefTable.setNextIdentifier( *$2 );
1069	$$ = $1->addName( $2 );
1070	}
1071	\| new_abstract_tuple identifier_or_type_name asm_name_opt
1072	{
1073	typedefTable.setNextIdentifier( *$2 );
1074	$$ = $1->addName( $2 );
1075	}
1076	\| type_qualifier_list new_abstract_tuple identifier_or_type_name asm_name_opt
1077	{
1078	typedefTable.setNextIdentifier( *$3 );
1079	$$ = $2->addQualifiers( $1 )->addName( $3 );
1080	}
1081	;
1082
1083	new_function_declaration: // CFA
1084	new_function_specifier
1085	{
1086	typedefTable.addToEnclosingScope( TypedefTable::ID );
1087	$$ = $1;
1088	}
1089	\| type_qualifier_list new_function_specifier
1090	{
1091	typedefTable.addToEnclosingScope( TypedefTable::ID );
1092	$$ = $2->addQualifiers( $1 );
1093	}
1094	\| declaration_qualifier_list new_function_specifier
1095	{
1096	typedefTable.addToEnclosingScope( TypedefTable::ID );
1097	$$ = $2->addQualifiers( $1 );
1098	}
1099	\| declaration_qualifier_list type_qualifier_list new_function_specifier
1100	{
1101	typedefTable.addToEnclosingScope( TypedefTable::ID );
1102	$$ = $3->addQualifiers( $1 )->addQualifiers( $2 );
1103	}
1104	\| new_function_declaration pop ',' push identifier_or_type_name
1105	{
1106	typedefTable.addToEnclosingScope( *$5, TypedefTable::ID );
1107	$$ = $1->appendList( $1->cloneType( $5 ) );
1108	}
1109	;
1110
1111	new_function_specifier: // CFA
1112	'[' ']' identifier_or_type_name '(' push new_parameter_type_list_opt pop ')' // S/R conflict
1113	{
1114	$$ = DeclarationNode::newFunction( $3, DeclarationNode::newTuple( 0 ), $6, 0, true );
1115	}
1116	// '[' ']' identifier '(' push new_parameter_type_list_opt pop ')'
1117	// {
1118	// typedefTable.setNextIdentifier( *$5 );
1119	// $$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, 0, true );
1120	// }
1121	// \| '[' ']' TYPEDEFname '(' push new_parameter_type_list_opt pop ')'
1122	// {
1123	// typedefTable.setNextIdentifier( *$5 );
1124	// $$ = DeclarationNode::newFunction( $5, DeclarationNode::newTuple( 0 ), $8, 0, true );
1125	// }
1126	// \| '[' ']' typegen_name
1127	// identifier_or_type_name must be broken apart because of the sequence:
1128	//
1129	// '[' ']' identifier_or_type_name '(' new_parameter_type_list_opt ')'
1130	// '[' ']' type_specifier
1131	//
1132	// type_specifier can resolve to just TYPEDEFname (e.g., typedef int T; int f( T );). Therefore this must be
1133	// flattened to allow lookahead to the '(' without having to reduce identifier_or_type_name.
1134	\| new_abstract_tuple identifier_or_type_name '(' push new_parameter_type_list_opt pop ')'
1135	// To obtain LR(1 ), this rule must be factored out from function return type (see new_abstract_declarator).
1136	{
1137	$$ = DeclarationNode::newFunction( $2, $1, $5, 0, true );
1138	}
1139	\| new_function_return identifier_or_type_name '(' push new_parameter_type_list_opt pop ')'
1140	{
1141	$$ = DeclarationNode::newFunction( $2, $1, $5, 0, true );
1142	}
1143	;
1144
1145	new_function_return: // CFA
1146	'[' push new_parameter_list pop ']'
1147	{ $$ = DeclarationNode::newTuple( $3 ); }
1148	\| '[' push new_parameter_list pop ',' push new_abstract_parameter_list pop ']'
1149	// To obtain LR(1 ), the last new_abstract_parameter_list is added into this flattened rule to lookahead to the
1150	// ']'.
1151	{ $$ = DeclarationNode::newTuple( $3->appendList( $7 ) ); }
1152	;
1153
1154	new_typedef_declaration: // CFA
1155	TYPEDEF new_variable_specifier
1156	{
1157	typedefTable.addToEnclosingScope( TypedefTable::TD );
1158	$$ = $2->addTypedef();
1159	}
1160	\| TYPEDEF new_function_specifier
1161	{
1162	typedefTable.addToEnclosingScope( TypedefTable::TD );
1163	$$ = $2->addTypedef();
1164	}
1165	\| new_typedef_declaration pop ',' push no_attr_identifier
1166	{
1167	typedefTable.addToEnclosingScope( *$5, TypedefTable::TD );
1168	$$ = $1->appendList( $1->cloneType( $5 ) );
1169	}
1170	;
1171
1172	// Traditionally typedef is part of storage-class specifier for syntactic convenience only. Here, it is factored out as
1173	// a separate form of declaration, which syntactically precludes storage-class specifiers and initialization.
1174
1175	typedef_declaration:
1176	TYPEDEF type_specifier declarator
1177	{
1178	typedefTable.addToEnclosingScope( TypedefTable::TD );
1179	$$ = $3->addType( $2 )->addTypedef();
1180	}
1181	\| typedef_declaration pop ',' push declarator
1182	{
1183	typedefTable.addToEnclosingScope( TypedefTable::TD );
1184	$$ = $1->appendList( $1->cloneBaseType( $5 )->addTypedef() );
1185	}
1186	\| type_qualifier_list TYPEDEF type_specifier declarator // remaining OBSOLESCENT (see 2 )
1187	{
1188	typedefTable.addToEnclosingScope( TypedefTable::TD );
1189	$$ = $4->addType( $3 )->addQualifiers( $1 )->addTypedef();
1190	}
1191	\| type_specifier TYPEDEF declarator
1192	{
1193	typedefTable.addToEnclosingScope( TypedefTable::TD );
1194	$$ = $3->addType( $1 )->addTypedef();
1195	}
1196	\| type_specifier TYPEDEF type_qualifier_list declarator
1197	{
1198	typedefTable.addToEnclosingScope( TypedefTable::TD );
1199	$$ = $4->addQualifiers( $1 )->addTypedef()->addType( $1 );
1200	}
1201	;
1202
1203	typedef_expression:
1204	// GCC, naming expression type: typedef name = exp; gives a name to the type of an expression
1205	TYPEDEF no_attr_identifier '=' assignment_expression
1206	{
1207	typedefTable.addToEnclosingScope( *$2, TypedefTable::TD );
1208	$$ = DeclarationNode::newName( 0 ); // XXX
1209	}
1210	\| typedef_expression pop ',' push no_attr_identifier '=' assignment_expression
1211	{
1212	typedefTable.addToEnclosingScope( *$5, TypedefTable::TD );
1213	$$ = DeclarationNode::newName( 0 ); // XXX
1214	}
1215	;
1216
1217	old_declaration:
1218	declaring_list pop ';'
1219	\| typedef_declaration pop ';'
1220	\| typedef_expression pop ';' // GCC, naming expression type
1221	\| sue_declaration_specifier pop ';'
1222	;
1223
1224	declaring_list:
1225	// A semantic check is required to ensure asm_name only appears on declarations with implicit or explicit static
1226	// storage-class
1227	declaration_specifier declarator asm_name_opt initializer_opt
1228	{
1229	typedefTable.addToEnclosingScope( TypedefTable::ID );
1230	$$ = ( $2->addType( $1 ))->addInitializer( $4 );
1231	}
1232	\| declaring_list ',' attribute_list_opt declarator asm_name_opt initializer_opt
1233	{
1234	typedefTable.addToEnclosingScope( TypedefTable::ID );
1235	$$ = $1->appendList( $1->cloneBaseType( $4->addInitializer( $6 ) ) );
1236	}
1237	;
1238
1239	declaration_specifier: // type specifier + storage class
1240	basic_declaration_specifier
1241	\| sue_declaration_specifier
1242	\| typedef_declaration_specifier
1243	\| typegen_declaration_specifier
1244	;
1245
1246	type_specifier: // declaration specifier - storage class
1247	basic_type_specifier
1248	\| sue_type_specifier
1249	\| typedef_type_specifier
1250	\| typegen_type_specifier
1251	;
1252
1253	type_qualifier_list_opt: // GCC, used in asm_statement
1254	// empty
1255	{ $$ = 0; }
1256	\| type_qualifier_list
1257	;
1258
1259	type_qualifier_list:
1260	// A semantic check is necessary to ensure a type qualifier is appropriate for the kind of declaration.
1261	//
1262	// ISO/IEC 9899:1999 Section 6.7.3(4 ) : If the same qualifier appears more than once in the same
1263	// specifier-qualifier-list, either directly or via one or more typedefs, the behavior is the same as if it
1264	// appeared only once.
1265	type_qualifier
1266	\| type_qualifier_list type_qualifier
1267	{ $$ = $1->addQualifiers( $2 ); }
1268	;
1269
1270	type_qualifier:
1271	type_qualifier_name
1272	\| attribute
1273	//{ $$ = DeclarationNode::newQualifier( DeclarationNode::Attribute ); }
1274	;
1275
1276	type_qualifier_name:
1277	CONST
1278	{ $$ = DeclarationNode::newQualifier( DeclarationNode::Const ); }
1279	\| RESTRICT
1280	{ $$ = DeclarationNode::newQualifier( DeclarationNode::Restrict ); }
1281	\| VOLATILE
1282	{ $$ = DeclarationNode::newQualifier( DeclarationNode::Volatile ); }
1283	\| LVALUE // CFA
1284	{ $$ = DeclarationNode::newQualifier( DeclarationNode::Lvalue ); }
1285	\| ATOMIC
1286	{ $$ = DeclarationNode::newQualifier( DeclarationNode::Atomic ); }
1287	\| FORALL '('
1288	{
1289	typedefTable.enterScope();
1290	}
1291	type_parameter_list ')' // CFA
1292	{
1293	typedefTable.leaveScope();
1294	$$ = DeclarationNode::newForall( $4 );
1295	}
1296	;
1297
1298	declaration_qualifier_list:
1299	storage_class_list
1300	\| type_qualifier_list storage_class_list // remaining OBSOLESCENT (see 2 )
1301	{ $$ = $1->addQualifiers( $2 ); }
1302	\| declaration_qualifier_list type_qualifier_list storage_class_list
1303	{ $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1304	;
1305
1306	storage_class_list:
1307	// A semantic check is necessary to ensure a storage class is appropriate for the kind of declaration and that
1308	// only one of each is specified, except for inline, which can appear with the others.
1309	//
1310	// ISO/IEC 9899:1999 Section 6.7.1(2) : At most, one storage-class specifier may be given in the declaration
1311	// specifiers in a declaration.
1312	storage_class
1313	\| storage_class_list storage_class
1314	{ $$ = $1->addQualifiers( $2 ); }
1315	;
1316
1317	storage_class:
1318	storage_class_name
1319	;
1320
1321	storage_class_name:
1322	EXTERN
1323	{ $$ = DeclarationNode::newStorageClass( DeclarationNode::Extern ); }
1324	\| STATIC
1325	{ $$ = DeclarationNode::newStorageClass( DeclarationNode::Static ); }
1326	\| AUTO
1327	{ $$ = DeclarationNode::newStorageClass( DeclarationNode::Auto ); }
1328	\| REGISTER
1329	{ $$ = DeclarationNode::newStorageClass( DeclarationNode::Register ); }
1330	\| INLINE // C99
1331	{ $$ = DeclarationNode::newStorageClass( DeclarationNode::Inline ); }
1332	\| FORTRAN // C99
1333	{ $$ = DeclarationNode::newStorageClass( DeclarationNode::Fortran ); }
1334	\| NORETURN // C11
1335	{ $$ = DeclarationNode::newStorageClass( DeclarationNode::Noreturn ); }
1336	\| THREADLOCAL // C11
1337	{ $$ = DeclarationNode::newStorageClass( DeclarationNode::Threadlocal ); }
1338	;
1339
1340	basic_type_name:
1341	CHAR
1342	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Char ); }
1343	\| DOUBLE
1344	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Double ); }
1345	\| FLOAT
1346	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Float ); }
1347	\| INT
1348	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Int ); }
1349	\| LONG
1350	{ $$ = DeclarationNode::newModifier( DeclarationNode::Long ); }
1351	\| SHORT
1352	{ $$ = DeclarationNode::newModifier( DeclarationNode::Short ); }
1353	\| SIGNED
1354	{ $$ = DeclarationNode::newModifier( DeclarationNode::Signed ); }
1355	\| UNSIGNED
1356	{ $$ = DeclarationNode::newModifier( DeclarationNode::Unsigned ); }
1357	\| VOID
1358	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Void ); }
1359	\| BOOL // C99
1360	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Bool ); }
1361	\| COMPLEX // C99
1362	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Complex ); }
1363	\| IMAGINARY // C99
1364	{ $$ = DeclarationNode::newBasicType( DeclarationNode::Imaginary ); }
1365	\| VALIST // GCC, __builtin_va_list
1366	{ $$ = DeclarationNode::newBuiltinType( DeclarationNode::Valist ); }
1367	;
1368
1369	basic_declaration_specifier:
1370	// A semantic check is necessary for conflicting storage classes.
1371	basic_type_specifier
1372	\| declaration_qualifier_list basic_type_specifier
1373	{ $$ = $2->addQualifiers( $1 ); }
1374	\| basic_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1375	{ $$ = $1->addQualifiers( $2 ); }
1376	\| basic_declaration_specifier storage_class type_qualifier_list
1377	{ $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1378	\| basic_declaration_specifier storage_class basic_type_specifier
1379	{ $$ = $3->addQualifiers( $2 )->addType( $1 ); }
1380	;
1381
1382	basic_type_specifier:
1383	direct_type_name
1384	\| type_qualifier_list_opt indirect_type_name type_qualifier_list_opt
1385	{ $$ = $2->addQualifiers( $1 )->addQualifiers( $3 ); }
1386	;
1387
1388	direct_type_name:
1389	// A semantic check is necessary for conflicting type qualifiers.
1390	basic_type_name
1391	\| type_qualifier_list basic_type_name
1392	{ $$ = $2->addQualifiers( $1 ); }
1393	\| direct_type_name type_qualifier
1394	{ $$ = $1->addQualifiers( $2 ); }
1395	\| direct_type_name basic_type_name
1396	{ $$ = $1->addType( $2 ); }
1397	;
1398
1399	indirect_type_name:
1400	TYPEOF '(' type_name ')' // GCC: typeof(x) y;
1401	{ $$ = $3; }
1402	\| TYPEOF '(' comma_expression ')' // GCC: typeof(a+b) y;
1403	{ $$ = DeclarationNode::newTypeof( $3 ); }
1404	\| ATTR_TYPEGENname '(' type_name ')' // CFA: e.g., @type(x) y;
1405	{ $$ = DeclarationNode::newAttr( $1, $3 ); }
1406	\| ATTR_TYPEGENname '(' comma_expression ')' // CFA: e.g., @type(a+b) y;
1407	{ $$ = DeclarationNode::newAttr( $1, $3 ); }
1408	;
1409
1410	sue_declaration_specifier:
1411	sue_type_specifier
1412	\| declaration_qualifier_list sue_type_specifier
1413	{ $$ = $2->addQualifiers( $1 ); }
1414	\| sue_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1415	{ $$ = $1->addQualifiers( $2 ); }
1416	\| sue_declaration_specifier storage_class type_qualifier_list
1417	{ $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1418	;
1419
1420	sue_type_specifier:
1421	elaborated_type_name // struct, union, enum
1422	\| type_qualifier_list elaborated_type_name
1423	{ $$ = $2->addQualifiers( $1 ); }
1424	\| sue_type_specifier type_qualifier
1425	{ $$ = $1->addQualifiers( $2 ); }
1426	;
1427
1428	typedef_declaration_specifier:
1429	typedef_type_specifier
1430	\| declaration_qualifier_list typedef_type_specifier
1431	{ $$ = $2->addQualifiers( $1 ); }
1432	\| typedef_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1433	{ $$ = $1->addQualifiers( $2 ); }
1434	\| typedef_declaration_specifier storage_class type_qualifier_list
1435	{ $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1436	;
1437
1438	typedef_type_specifier: // typedef types
1439	TYPEDEFname
1440	{ $$ = DeclarationNode::newFromTypedef( $1 ); }
1441	\| type_qualifier_list TYPEDEFname
1442	{ $$ = DeclarationNode::newFromTypedef( $2 )->addQualifiers( $1 ); }
1443	\| typedef_type_specifier type_qualifier
1444	{ $$ = $1->addQualifiers( $2 ); }
1445	;
1446
1447	elaborated_type_name:
1448	aggregate_name
1449	\| enum_name
1450	;
1451
1452	aggregate_name:
1453	aggregate_key '{' field_declaration_list '}'
1454	{ $$ = DeclarationNode::newAggregate( $1, 0, 0, $3 ); }
1455	\| aggregate_key no_attr_identifier_or_type_name
1456	{
1457	typedefTable.makeTypedef( *$2 );
1458	$$ = DeclarationNode::newAggregate( $1, $2, 0, 0 );
1459	}
1460	\| aggregate_key no_attr_identifier_or_type_name
1461	{ typedefTable.makeTypedef( *$2 ); }
1462	'{' field_declaration_list '}'
1463	{ $$ = DeclarationNode::newAggregate( $1, $2, 0, $5 ); }
1464	\| aggregate_key '(' type_name_list ')' '{' field_declaration_list '}' // CFA
1465	{ $$ = DeclarationNode::newAggregate( $1, 0, $3, $6 ); }
1466	\| aggregate_key typegen_name // CFA, S/R conflict
1467	{ $$ = $2; }
1468	;
1469
1470	aggregate_key:
1471	STRUCT attribute_list_opt
1472	{ $$ = DeclarationNode::Struct; }
1473	\| UNION attribute_list_opt
1474	{ $$ = DeclarationNode::Union; }
1475	;
1476
1477	field_declaration_list:
1478	field_declaration
1479	{ $$ = $1; }
1480	\| field_declaration_list field_declaration
1481	{ $$ = $1->appendList( $2 ); }
1482	;
1483
1484	field_declaration:
1485	new_field_declaring_list ';' // CFA, new style field declaration
1486	\| EXTENSION new_field_declaring_list ';' // GCC
1487	{ $$ = $2->set_extension( true ); }
1488	\| field_declaring_list ';'
1489	\| EXTENSION field_declaring_list ';' // GCC
1490	{ // mark all fields in list
1491	for ( DeclarationNode iter = $2; iter != NULL; iter = (DeclarationNode )iter->get_link() )
1492	iter->set_extension( true );
1493	$$ = $2;
1494	}
1495	;
1496
1497	new_field_declaring_list: // CFA, new style field declaration
1498	new_abstract_declarator_tuple // CFA, no field name
1499	\| new_abstract_declarator_tuple no_attr_identifier_or_type_name
1500	{ $$ = $1->addName( $2 ); }
1501	\| new_field_declaring_list ',' no_attr_identifier_or_type_name
1502	{ $$ = $1->appendList( $1->cloneType( $3 ) ); }
1503	\| new_field_declaring_list ',' // CFA, no field name
1504	{ $$ = $1->appendList( $1->cloneType( 0 ) ); }
1505	;
1506
1507	field_declaring_list:
1508	type_specifier field_declarator
1509	{ $$ = $2->addType( $1 ); }
1510	\| field_declaring_list ',' attribute_list_opt field_declarator
1511	{ $$ = $1->appendList( $1->cloneBaseType( $4 ) ); }
1512	;
1513
1514	field_declarator:
1515	// empty
1516	{ $$ = DeclarationNode::newName( 0 ); /* XXX */ } // CFA, no field name
1517	\| bit_subrange_size // no field name
1518	{ $$ = DeclarationNode::newBitfield( $1 ); }
1519	\| variable_declarator bit_subrange_size_opt
1520	// A semantic check is required to ensure bit_subrange only appears on base type int.
1521	{ $$ = $1->addBitfield( $2 ); }
1522	\| variable_type_redeclarator bit_subrange_size_opt
1523	// A semantic check is required to ensure bit_subrange only appears on base type int.
1524	{ $$ = $1->addBitfield( $2 ); }
1525	\| variable_abstract_declarator // CFA, no field name
1526	;
1527
1528	bit_subrange_size_opt:
1529	// empty
1530	{ $$ = 0; }
1531	\| bit_subrange_size
1532	{ $$ = $1; }
1533	;
1534
1535	bit_subrange_size:
1536	':' constant_expression
1537	{ $$ = $2; }
1538	;
1539
1540	enum_key:
1541	ENUM attribute_list_opt
1542	;
1543
1544	enum_name:
1545	enum_key '{' enumerator_list comma_opt '}'
1546	{ $$ = DeclarationNode::newEnum( 0, $3 ); }
1547	\| enum_key no_attr_identifier_or_type_name
1548	{
1549	typedefTable.makeTypedef( *$2 );
1550	$$ = DeclarationNode::newEnum( $2, 0 );
1551	}
1552	\| enum_key no_attr_identifier_or_type_name
1553	{ typedefTable.makeTypedef( *$2 ); }
1554	'{' enumerator_list comma_opt '}'
1555	{ $$ = DeclarationNode::newEnum( $2, $5 ); }
1556	;
1557
1558	enumerator_list:
1559	no_attr_identifier_or_type_name enumerator_value_opt
1560	{ $$ = DeclarationNode::newEnumConstant( $1, $2 ); }
1561	\| enumerator_list ',' no_attr_identifier_or_type_name enumerator_value_opt
1562	{ $$ = $1->appendList( DeclarationNode::newEnumConstant( $3, $4 ) ); }
1563	;
1564
1565	enumerator_value_opt:
1566	// empty
1567	{ $$ = 0; }
1568	\| '=' constant_expression
1569	{ $$ = $2; }
1570	;
1571
1572	// Minimum of one parameter after which ellipsis is allowed only at the end.
1573
1574	new_parameter_type_list_opt: // CFA
1575	// empty
1576	{ $$ = 0; }
1577	\| new_parameter_type_list
1578	;
1579
1580	new_parameter_type_list: // CFA, abstract + real
1581	new_abstract_parameter_list
1582	\| new_parameter_list
1583	\| new_parameter_list pop ',' push new_abstract_parameter_list
1584	{ $$ = $1->appendList( $5 ); }
1585	\| new_abstract_parameter_list pop ',' push ELLIPSIS
1586	{ $$ = $1->addVarArgs(); }
1587	\| new_parameter_list pop ',' push ELLIPSIS
1588	{ $$ = $1->addVarArgs(); }
1589	;
1590
1591	new_parameter_list: // CFA
1592	// To obtain LR(1) between new_parameter_list and new_abstract_tuple, the last new_abstract_parameter_list is
1593	// factored out from new_parameter_list, flattening the rules to get lookahead to the ']'.
1594	new_parameter_declaration
1595	\| new_abstract_parameter_list pop ',' push new_parameter_declaration
1596	{ $$ = $1->appendList( $5 ); }
1597	\| new_parameter_list pop ',' push new_parameter_declaration
1598	{ $$ = $1->appendList( $5 ); }
1599	\| new_parameter_list pop ',' push new_abstract_parameter_list pop ',' push new_parameter_declaration
1600	{ $$ = $1->appendList( $5 )->appendList( $9 ); }
1601	;
1602
1603	new_abstract_parameter_list: // CFA, new & old style abstract
1604	new_abstract_parameter_declaration
1605	\| new_abstract_parameter_list pop ',' push new_abstract_parameter_declaration
1606	{ $$ = $1->appendList( $5 ); }
1607	;
1608
1609	parameter_type_list_opt:
1610	// empty
1611	{ $$ = 0; }
1612	\| parameter_type_list
1613	;
1614
1615	parameter_type_list:
1616	parameter_list
1617	\| parameter_list pop ',' push ELLIPSIS
1618	{ $$ = $1->addVarArgs(); }
1619	;
1620
1621	parameter_list: // abstract + real
1622	abstract_parameter_declaration
1623	\| parameter_declaration
1624	\| parameter_list pop ',' push abstract_parameter_declaration
1625	{ $$ = $1->appendList( $5 ); }
1626	\| parameter_list pop ',' push parameter_declaration
1627	{ $$ = $1->appendList( $5 ); }
1628	;
1629
1630	// Provides optional identifier names (abstract_declarator/variable_declarator), no initialization, different semantics
1631	// for typedef name by using type_parameter_redeclarator instead of typedef_redeclarator, and function prototypes.
1632
1633	new_parameter_declaration: // CFA, new & old style parameter declaration
1634	parameter_declaration
1635	\| new_identifier_parameter_declarator_no_tuple identifier_or_type_name assignment_opt
1636	{ $$ = $1->addName( $2 ); }
1637	\| new_abstract_tuple identifier_or_type_name assignment_opt
1638	// To obtain LR(1), these rules must be duplicated here (see new_abstract_declarator).
1639	{ $$ = $1->addName( $2 ); }
1640	\| type_qualifier_list new_abstract_tuple identifier_or_type_name assignment_opt
1641	{ $$ = $2->addName( $3 )->addQualifiers( $1 ); }
1642	\| new_function_specifier
1643	;
1644
1645	new_abstract_parameter_declaration: // CFA, new & old style parameter declaration
1646	abstract_parameter_declaration
1647	\| new_identifier_parameter_declarator_no_tuple
1648	\| new_abstract_tuple
1649	// To obtain LR(1), these rules must be duplicated here (see new_abstract_declarator).
1650	\| type_qualifier_list new_abstract_tuple
1651	{ $$ = $2->addQualifiers( $1 ); }
1652	\| new_abstract_function
1653	;
1654
1655	parameter_declaration:
1656	declaration_specifier identifier_parameter_declarator assignment_opt
1657	{
1658	typedefTable.addToEnclosingScope( TypedefTable::ID );
1659	$$ = $2->addType( $1 )->addInitializer( new InitializerNode( $3 ) );
1660	}
1661	\| declaration_specifier type_parameter_redeclarator assignment_opt
1662	{
1663	typedefTable.addToEnclosingScope( TypedefTable::ID );
1664	$$ = $2->addType( $1 )->addInitializer( new InitializerNode( $3 ) );
1665	}
1666	;
1667
1668	abstract_parameter_declaration:
1669	declaration_specifier
1670	\| declaration_specifier abstract_parameter_declarator
1671	{ $$ = $2->addType( $1 ); }
1672	;
1673
1674	// ISO/IEC 9899:1999 Section 6.9.1(6) : "An identifier declared as a typedef name shall not be redeclared as a
1675	// parameter." Because the scope of the K&R-style parameter-list sees the typedef first, the following is based only on
1676	// identifiers. The ANSI-style parameter-list can redefine a typedef name.
1677
1678	identifier_list: // K&R-style parameter list => no types
1679	no_attr_identifier
1680	{ $$ = DeclarationNode::newName( $1 ); }
1681	\| identifier_list ',' no_attr_identifier
1682	{ $$ = $1->appendList( DeclarationNode::newName( $3 ) ); }
1683	;
1684
1685	identifier_or_type_name:
1686	identifier
1687	\| TYPEDEFname
1688	\| TYPEGENname
1689	;
1690
1691	no_01_identifier_or_type_name:
1692	no_01_identifier
1693	\| TYPEDEFname
1694	\| TYPEGENname
1695	;
1696
1697	no_attr_identifier_or_type_name:
1698	no_attr_identifier
1699	\| TYPEDEFname
1700	\| TYPEGENname
1701	;
1702
1703	type_name_no_function: // sizeof, alignof, cast (constructor)
1704	new_abstract_declarator_tuple // CFA
1705	\| type_specifier
1706	\| type_specifier variable_abstract_declarator
1707	{ $$ = $2->addType( $1 ); }
1708	;
1709
1710	type_name: // typeof, assertion
1711	new_abstract_declarator_tuple // CFA
1712	\| new_abstract_function // CFA
1713	\| type_specifier
1714	\| type_specifier abstract_declarator
1715	{ $$ = $2->addType( $1 ); }
1716	;
1717
1718	initializer_opt:
1719	// empty
1720	{ $$ = 0; }
1721	\| '=' initializer
1722	{ $$ = $2; }
1723	\| ATassign initializer
1724	{ $$ = $2->set_maybeConstructed( false ); }
1725	;
1726
1727	initializer:
1728	assignment_expression { $$ = new InitializerNode( $1 ); }
1729	\| '{' initializer_list comma_opt '}' { $$ = new InitializerNode( $2, true ); }
1730	;
1731
1732	initializer_list:
1733	// empty
1734	{ $$ = 0; }
1735	\| initializer
1736	\| designation initializer { $$ = $2->set_designators( $1 ); }
1737	\| initializer_list ',' initializer { $$ = (InitializerNode *)( $1->set_link( $3 ) ); }
1738	\| initializer_list ',' designation initializer
1739	{ $$ = (InitializerNode *)( $1->set_link( $4->set_designators( $3 ) ) ); }
1740	;
1741
1742	// There is an unreconcileable parsing problem between C99 and CFA with respect to designators. The problem is use of
1743	// '=' to separator the designator from the initializer value, as in:
1744	//
1745	// int x[10] = { [1] = 3 };
1746	//
1747	// The string "[1] = 3" can be parsed as a designator assignment or a tuple assignment. To disambiguate this case, CFA
1748	// changes the syntax from "=" to ":" as the separator between the designator and initializer. GCC does uses ":" for
1749	// field selection. The optional use of the "=" in GCC, or in this case ":", cannot be supported either due to
1750	// shift/reduce conflicts
1751
1752	designation:
1753	designator_list ':' // C99, CFA uses ":" instead of "="
1754	\| no_attr_identifier_or_type_name ':' // GCC, field name
1755	{ $$ = new VarRefNode( $1 ); }
1756	;
1757
1758	designator_list: // C99
1759	designator
1760	\| designator_list designator
1761	{ $$ = (ExpressionNode *)( $1->set_link( $2 )); }
1762	//\| designator_list designator { $$ = new CompositeExprNode( $1, $2 ); }
1763	;
1764
1765	designator:
1766	// lexer ambiguity: designator ".0" is floating-point constant or designator for name 0 only ".0" and ".1"
1767	// allowed => semantic check
1768	FLOATINGconstant
1769	{ $$ = new DesignatorNode( new VarRefNode( $1 ) ); }
1770	\| '.' no_attr_identifier_or_type_name // C99, field name
1771	{ $$ = new DesignatorNode( new VarRefNode( $2 ) ); }
1772	\| '[' push assignment_expression pop ']' // C99, single array element
1773	// assignment_expression used instead of constant_expression because of shift/reduce conflicts with tuple.
1774	{ $$ = new DesignatorNode( $3, true ); }
1775	\| '[' push subrange pop ']' // CFA, multiple array elements
1776	{ $$ = new DesignatorNode( $3, true ); }
1777	\| '[' push constant_expression ELLIPSIS constant_expression pop ']' // GCC, multiple array elements
1778	{ $$ = new DesignatorNode( new CompositeExprNode( new OperatorNode( OperatorNode::Range ), $3, $5 ), true ); }
1779	\| '.' '[' push field_list pop ']' // CFA, tuple field selector
1780	{ $$ = new DesignatorNode( $4 ); }
1781	;
1782
1783	// The CFA type system is based on parametric polymorphism, the ability to declare functions with type parameters,
1784	// rather than an object-oriented type system. This required four groups of extensions:
1785	//
1786	// Overloading: function, data, and operator identifiers may be overloaded.
1787	//
1788	// Type declarations: "type" is used to generate new types for declaring objects. Similarly, "dtype" is used for object
1789	// and incomplete types, and "ftype" is used for function types. Type declarations with initializers provide
1790	// definitions of new types. Type declarations with storage class "extern" provide opaque types.
1791	//
1792	// Polymorphic functions: A forall clause declares a type parameter. The corresponding argument is inferred at the call
1793	// site. A polymorphic function is not a template; it is a function, with an address and a type.
1794	//
1795	// Specifications and Assertions: Specifications are collections of declarations parameterized by one or more
1796	// types. They serve many of the purposes of abstract classes, and specification hierarchies resemble subclass
1797	// hierarchies. Unlike classes, they can define relationships between types. Assertions declare that a type or
1798	// types provide the operations declared by a specification. Assertions are normally used to declare requirements
1799	// on type arguments of polymorphic functions.
1800
1801	typegen_declaration_specifier: // CFA
1802	typegen_type_specifier
1803	\| declaration_qualifier_list typegen_type_specifier
1804	{ $$ = $2->addQualifiers( $1 ); }
1805	\| typegen_declaration_specifier storage_class // remaining OBSOLESCENT (see 2)
1806	{ $$ = $1->addQualifiers( $2 ); }
1807	\| typegen_declaration_specifier storage_class type_qualifier_list
1808	{ $$ = $1->addQualifiers( $2 )->addQualifiers( $3 ); }
1809	;
1810
1811	typegen_type_specifier: // CFA
1812	typegen_name
1813	\| type_qualifier_list typegen_name
1814	{ $$ = $2->addQualifiers( $1 ); }
1815	\| typegen_type_specifier type_qualifier
1816	{ $$ = $1->addQualifiers( $2 ); }
1817	;
1818
1819	typegen_name: // CFA
1820	TYPEGENname '(' type_name_list ')'
1821	{ $$ = DeclarationNode::newFromTypeGen( $1, $3 ); }
1822	;
1823
1824	type_parameter_list: // CFA
1825	type_parameter assignment_opt
1826	\| type_parameter_list ',' type_parameter assignment_opt
1827	{ $$ = $1->appendList( $3 ); }
1828	;
1829
1830	type_parameter: // CFA
1831	type_class no_attr_identifier_or_type_name
1832	{ typedefTable.addToEnclosingScope( *$2, TypedefTable::TD ); }
1833	assertion_list_opt
1834	{ $$ = DeclarationNode::newTypeParam( $1, $2 )->addAssertions( $4 ); }
1835	\| type_specifier identifier_parameter_declarator
1836	;
1837
1838	type_class: // CFA
1839	OTYPE
1840	{ $$ = DeclarationNode::Type; }
1841	\| DTYPE
1842	{ $$ = DeclarationNode::Ftype; }
1843	\| FTYPE
1844	{ $$ = DeclarationNode::Dtype; }
1845	;
1846
1847	assertion_list_opt: // CFA
1848	// empty
1849	{ $$ = 0; }
1850	\| assertion_list_opt assertion
1851	{ $$ = $1 != 0 ? $1->appendList( $2 ) : $2; }
1852	;
1853
1854	assertion: // CFA
1855	'\|' no_attr_identifier_or_type_name '(' type_name_list ')'
1856	{
1857	typedefTable.openTrait( *$2 );
1858	$$ = DeclarationNode::newTraitUse( $2, $4 );
1859	}
1860	\| '\|' '{' push trait_declaration_list '}'
1861	{ $$ = $4; }
1862	\| '\|' '(' push type_parameter_list pop ')' '{' push trait_declaration_list '}' '(' type_name_list ')'
1863	{ $$ = 0; }
1864	;
1865
1866	type_name_list: // CFA
1867	type_name
1868	{ $$ = new TypeValueNode( $1 ); }
1869	\| assignment_expression
1870	\| type_name_list ',' type_name
1871	{ $$ = (ExpressionNode *)( $1->set_link( new TypeValueNode( $3 ))); }
1872	\| type_name_list ',' assignment_expression
1873	{ $$ = (ExpressionNode *)( $1->set_link( $3 )); }
1874	;
1875
1876	type_declaring_list: // CFA
1877	OTYPE type_declarator
1878	{ $$ = $2; }
1879	\| storage_class_list OTYPE type_declarator
1880	{ $$ = $3->addQualifiers( $1 ); }
1881	\| type_declaring_list ',' type_declarator
1882	{ $$ = $1->appendList( $3->copyStorageClasses( $1 ) ); }
1883	;
1884
1885	type_declarator: // CFA
1886	type_declarator_name assertion_list_opt
1887	{ $$ = $1->addAssertions( $2 ); }
1888	\| type_declarator_name assertion_list_opt '=' type_name
1889	{ $$ = $1->addAssertions( $2 )->addType( $4 ); }
1890	;
1891
1892	type_declarator_name: // CFA
1893	no_attr_identifier_or_type_name
1894	{
1895	typedefTable.addToEnclosingScope( *$1, TypedefTable::TD );
1896	$$ = DeclarationNode::newTypeDecl( $1, 0 );
1897	}
1898	\| no_01_identifier_or_type_name '(' push type_parameter_list pop ')'
1899	{
1900	typedefTable.addToEnclosingScope( *$1, TypedefTable::TG );
1901	$$ = DeclarationNode::newTypeDecl( $1, $4 );
1902	}
1903	;
1904
1905	trait_specifier: // CFA
1906	TRAIT no_attr_identifier_or_type_name '(' push type_parameter_list pop ')' '{' '}'
1907	{
1908	typedefTable.addToEnclosingScope( *$2, TypedefTable::ID );
1909	$$ = DeclarationNode::newTrait( $2, $5, 0 );
1910	}
1911	\| TRAIT no_attr_identifier_or_type_name '(' push type_parameter_list pop ')' '{'
1912	{
1913	typedefTable.enterTrait( *$2 );
1914	typedefTable.enterScope();
1915	}
1916	trait_declaration_list '}'
1917	{
1918	typedefTable.leaveTrait();
1919	typedefTable.addToEnclosingScope( *$2, TypedefTable::ID );
1920	$$ = DeclarationNode::newTrait( $2, $5, $10 );
1921	}
1922	;
1923
1924	trait_declaration_list: // CFA
1925	trait_declaration
1926	\| trait_declaration_list push trait_declaration
1927	{ $$ = $1->appendList( $3 ); }
1928	;
1929
1930	trait_declaration: // CFA
1931	new_trait_declaring_list pop ';'
1932	\| trait_declaring_list pop ';'
1933	;
1934
1935	new_trait_declaring_list: // CFA
1936	new_variable_specifier
1937	{
1938	typedefTable.addToEnclosingScope2( TypedefTable::ID );
1939	$$ = $1;
1940	}
1941	\| new_function_specifier
1942	{
1943	typedefTable.addToEnclosingScope2( TypedefTable::ID );
1944	$$ = $1;
1945	}
1946	\| new_trait_declaring_list pop ',' push identifier_or_type_name
1947	{
1948	typedefTable.addToEnclosingScope2( *$5, TypedefTable::ID );
1949	$$ = $1->appendList( $1->cloneType( $5 ) );
1950	}
1951	;
1952
1953	trait_declaring_list: // CFA
1954	type_specifier declarator
1955	{
1956	typedefTable.addToEnclosingScope2( TypedefTable::ID );
1957	$$ = $2->addType( $1 );
1958	}
1959	\| trait_declaring_list pop ',' push declarator
1960	{
1961	typedefTable.addToEnclosingScope2( TypedefTable::ID );
1962	$$ = $1->appendList( $1->cloneBaseType( $5 ) );
1963	}
1964	;
1965
1966	//*************************** EXTERNAL DEFINITIONS ***************************
1967
1968	translation_unit:
1969	// empty
1970	{} // empty input file
1971	\| external_definition_list
1972	{
1973	if ( theTree ) {
1974	theTree->appendList( $1 );
1975	} else {
1976	theTree = $1;
1977	}
1978	}
1979	;
1980
1981	external_definition_list:
1982	external_definition
1983	\| external_definition_list push external_definition
1984	{ $$ = ( $1 != NULL ) ? $1->appendList( $3 ) : $3; }
1985	;
1986
1987	external_definition_list_opt:
1988	// empty
1989	{ $$ = 0; }
1990	\| external_definition_list
1991	;
1992
1993	external_definition:
1994	declaration
1995	\| external_function_definition
1996	\| asm_statement // GCC, global assembler statement
1997	{}
1998	\| EXTERN STRINGliteral
1999	{
2000	linkageStack.push( linkage );
2001	linkage = LinkageSpec::fromString( *$2 );
2002	}
2003	'{' external_definition_list_opt '}' // C++-style linkage specifier
2004	{
2005	linkage = linkageStack.top();
2006	linkageStack.pop();
2007	$$ = $5;
2008	}
2009	\| EXTENSION external_definition
2010	{ // mark all fields in list
2011	for ( DeclarationNode iter = $2; iter != NULL; iter = (DeclarationNode )iter->get_link() )
2012	iter->set_extension( true );
2013	$$ = $2;
2014	}
2015	;
2016
2017	external_function_definition:
2018	function_definition
2019	// These rules are a concession to the "implicit int" type_specifier because there is a significant amount of
2020	// legacy code with global functions missing the type-specifier for the return type, and assuming "int".
2021	// Parsing is possible because function_definition does not appear in the context of an expression (nested
2022	// functions preclude this concession, i.e., all nested function must have a return type). A function prototype
2023	// declaration must still have a type_specifier. OBSOLESCENT (see 1)
2024	\| function_declarator compound_statement
2025	{
2026	typedefTable.addToEnclosingScope( TypedefTable::ID );
2027	typedefTable.leaveScope();
2028	$$ = $1->addFunctionBody( $2 );
2029	}
2030	\| old_function_declarator push old_declaration_list_opt compound_statement
2031	{
2032	typedefTable.addToEnclosingScope( TypedefTable::ID );
2033	typedefTable.leaveScope();
2034	$$ = $1->addOldDeclList( $3 )->addFunctionBody( $4 );
2035	}
2036	;
2037
2038	function_definition:
2039	new_function_declaration compound_statement // CFA
2040	{
2041	typedefTable.addToEnclosingScope( TypedefTable::ID );
2042	typedefTable.leaveScope();
2043	$$ = $1->addFunctionBody( $2 );
2044	}
2045	\| declaration_specifier function_declarator compound_statement
2046	{
2047	typedefTable.addToEnclosingScope( TypedefTable::ID );
2048	typedefTable.leaveScope();
2049	$$ = $2->addFunctionBody( $3 )->addType( $1 );
2050	}
2051	\| type_qualifier_list function_declarator compound_statement
2052	{
2053	typedefTable.addToEnclosingScope( TypedefTable::ID );
2054	typedefTable.leaveScope();
2055	$$ = $2->addFunctionBody( $3 )->addQualifiers( $1 );
2056	}
2057	\| declaration_qualifier_list function_declarator compound_statement
2058	{
2059	typedefTable.addToEnclosingScope( TypedefTable::ID );
2060	typedefTable.leaveScope();
2061	$$ = $2->addFunctionBody( $3 )->addQualifiers( $1 );
2062	}
2063	\| declaration_qualifier_list type_qualifier_list function_declarator compound_statement
2064	{
2065	typedefTable.addToEnclosingScope( TypedefTable::ID );
2066	typedefTable.leaveScope();
2067	$$ = $3->addFunctionBody( $4 )->addQualifiers( $2 )->addQualifiers( $1 );
2068	}
2069
2070	// Old-style K&R function definition, OBSOLESCENT (see 4)
2071	\| declaration_specifier old_function_declarator push old_declaration_list_opt compound_statement
2072	{
2073	typedefTable.addToEnclosingScope( TypedefTable::ID );
2074	typedefTable.leaveScope();
2075	$$ = $2->addOldDeclList( $4 )->addFunctionBody( $5 )->addType( $1 );
2076	}
2077	\| type_qualifier_list old_function_declarator push old_declaration_list_opt compound_statement
2078	{
2079	typedefTable.addToEnclosingScope( TypedefTable::ID );
2080	typedefTable.leaveScope();
2081	$$ = $2->addOldDeclList( $4 )->addFunctionBody( $5 )->addQualifiers( $1 );
2082	}
2083
2084	// Old-style K&R function definition with "implicit int" type_specifier, OBSOLESCENT (see 4)
2085	\| declaration_qualifier_list old_function_declarator push old_declaration_list_opt compound_statement
2086	{
2087	typedefTable.addToEnclosingScope( TypedefTable::ID );
2088	typedefTable.leaveScope();
2089	$$ = $2->addOldDeclList( $4 )->addFunctionBody( $5 )->addQualifiers( $1 );
2090	}
2091	\| declaration_qualifier_list type_qualifier_list old_function_declarator push old_declaration_list_opt compound_statement
2092	{
2093	typedefTable.addToEnclosingScope( TypedefTable::ID );
2094	typedefTable.leaveScope();
2095	$$ = $3->addOldDeclList( $5 )->addFunctionBody( $6 )->addQualifiers( $2 )->addQualifiers( $1 );
2096	}
2097	;
2098
2099	declarator:
2100	variable_declarator
2101	\| variable_type_redeclarator
2102	\| function_declarator
2103	;
2104
2105	subrange:
2106	constant_expression '~' constant_expression // CFA, integer subrange
2107	{ $$ = new CompositeExprNode( new OperatorNode( OperatorNode::Range ), $1, $3 ); }
2108	;
2109
2110	asm_name_opt: // GCC
2111	// empty
2112	\| ASM '(' string_literal_list ')' attribute_list_opt
2113	;
2114
2115	attribute_list_opt: // GCC
2116	// empty
2117	{ $$ = 0; }
2118	\| attribute_list
2119	;
2120
2121	attribute_list: // GCC
2122	attribute
2123	\| attribute_list attribute
2124	{ $$ = $2->addQualifiers( $1 ); }
2125	;
2126
2127	attribute: // GCC
2128	ATTRIBUTE '(' '(' attribute_parameter_list ')' ')'
2129	// { $$ = DeclarationNode::newQualifier( DeclarationNode::Attribute ); }
2130	{ $$ = 0; }
2131	;
2132
2133	attribute_parameter_list: // GCC
2134	attrib
2135	\| attribute_parameter_list ',' attrib
2136	;
2137
2138	attrib: // GCC
2139	// empty
2140	\| any_word
2141	\| any_word '(' comma_expression_opt ')'
2142	;
2143
2144	any_word: // GCC
2145	identifier_or_type_name {}
2146	\| storage_class_name {}
2147	\| basic_type_name {}
2148	\| type_qualifier {}
2149	;
2150
2151	// ============================================================================
2152	// The following sections are a series of grammar patterns used to parse declarators. Multiple patterns are necessary
2153	// because the type of an identifier in wrapped around the identifier in the same form as its usage in an expression, as
2154	// in:
2155	//
2156	// int (*f())[10] { ... };
2157	// ... (*f())[3] += 1; // definition mimics usage
2158	//
2159	// Because these patterns are highly recursive, changes at a lower level in the recursion require copying some or all of
2160	// the pattern. Each of these patterns has some subtle variation to ensure correct syntax in a particular context.
2161	// ============================================================================
2162
2163	// ----------------------------------------------------------------------------
2164	// The set of valid declarators before a compound statement for defining a function is less than the set of declarators
2165	// to define a variable or function prototype, e.g.:
2166	//
2167	// valid declaration invalid definition
2168	// ----------------- ------------------
2169	// int f; int f {}
2170	// int f; int f {}
2171	// int f[10]; int f[10] {}
2172	// int (f)(int); int (f)(int) {}
2173	//
2174	// To preclude this syntactic anomaly requires separating the grammar rules for variable and function declarators, hence
2175	// variable_declarator and function_declarator.
2176	// ----------------------------------------------------------------------------
2177
2178	// This pattern parses a declaration of a variable that is not redefining a typedef name. The pattern precludes
2179	// declaring an array of functions versus a pointer to an array of functions.
2180
2181	variable_declarator:
2182	paren_identifier attribute_list_opt
2183	{ $$ = $1->addQualifiers( $2 ); }
2184	\| variable_ptr
2185	\| variable_array attribute_list_opt
2186	{ $$ = $1->addQualifiers( $2 ); }
2187	\| variable_function attribute_list_opt
2188	{ $$ = $1->addQualifiers( $2 ); }
2189	;
2190
2191	paren_identifier:
2192	identifier
2193	{
2194	typedefTable.setNextIdentifier( *$1 );
2195	$$ = DeclarationNode::newName( $1 );
2196	}
2197	\| '(' paren_identifier ')' // redundant parenthesis
2198	{ $$ = $2; }
2199	;
2200
2201	variable_ptr:
2202	ptrref_operator variable_declarator
2203	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2204	\| ptrref_operator type_qualifier_list variable_declarator
2205	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2206	\| '(' variable_ptr ')'
2207	{ $$ = $2; }
2208	;
2209
2210	variable_array:
2211	paren_identifier array_dimension
2212	{ $$ = $1->addArray( $2 ); }
2213	\| '(' variable_ptr ')' array_dimension
2214	{ $$ = $2->addArray( $4 ); }
2215	\| '(' variable_array ')' multi_array_dimension // redundant parenthesis
2216	{ $$ = $2->addArray( $4 ); }
2217	\| '(' variable_array ')' // redundant parenthesis
2218	{ $$ = $2; }
2219	;
2220
2221	variable_function:
2222	'(' variable_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2223	{ $$ = $2->addParamList( $6 ); }
2224	\| '(' variable_function ')' // redundant parenthesis
2225	{ $$ = $2; }
2226	;
2227
2228	// This pattern parses a function declarator that is not redefining a typedef name. For non-nested functions, there is
2229	// no context where a function definition can redefine a typedef name, i.e., the typedef and function name cannot exist
2230	// is the same scope. The pattern precludes returning arrays and functions versus pointers to arrays and functions.
2231
2232	function_declarator:
2233	function_no_ptr attribute_list_opt
2234	{ $$ = $1->addQualifiers( $2 ); }
2235	\| function_ptr
2236	\| function_array attribute_list_opt
2237	{ $$ = $1->addQualifiers( $2 ); }
2238	;
2239
2240	function_no_ptr:
2241	paren_identifier '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2242	{ $$ = $1->addParamList( $4 ); }
2243	\| '(' function_ptr ')' '(' push parameter_type_list_opt pop ')'
2244	{ $$ = $2->addParamList( $6 ); }
2245	\| '(' function_no_ptr ')' // redundant parenthesis
2246	{ $$ = $2; }
2247	;
2248
2249	function_ptr:
2250	ptrref_operator function_declarator
2251	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2252	\| ptrref_operator type_qualifier_list function_declarator
2253	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2254	\| '(' function_ptr ')'
2255	{ $$ = $2; }
2256	;
2257
2258	function_array:
2259	'(' function_ptr ')' array_dimension
2260	{ $$ = $2->addArray( $4 ); }
2261	\| '(' function_array ')' multi_array_dimension // redundant parenthesis
2262	{ $$ = $2->addArray( $4 ); }
2263	\| '(' function_array ')' // redundant parenthesis
2264	{ $$ = $2; }
2265	;
2266
2267	// This pattern parses an old-style K&R function declarator (OBSOLESCENT, see 4) that is not redefining a typedef name
2268	// (see function_declarator for additional comments). The pattern precludes returning arrays and functions versus
2269	// pointers to arrays and functions.
2270
2271	old_function_declarator:
2272	old_function_no_ptr
2273	\| old_function_ptr
2274	\| old_function_array
2275	;
2276
2277	old_function_no_ptr:
2278	paren_identifier '(' identifier_list ')' // function_declarator handles empty parameter
2279	{ $$ = $1->addIdList( $3 ); }
2280	\| '(' old_function_ptr ')' '(' identifier_list ')'
2281	{ $$ = $2->addIdList( $5 ); }
2282	\| '(' old_function_no_ptr ')' // redundant parenthesis
2283	{ $$ = $2; }
2284	;
2285
2286	old_function_ptr:
2287	ptrref_operator old_function_declarator
2288	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2289	\| ptrref_operator type_qualifier_list old_function_declarator
2290	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2291	\| '(' old_function_ptr ')'
2292	{ $$ = $2; }
2293	;
2294
2295	old_function_array:
2296	'(' old_function_ptr ')' array_dimension
2297	{ $$ = $2->addArray( $4 ); }
2298	\| '(' old_function_array ')' multi_array_dimension // redundant parenthesis
2299	{ $$ = $2->addArray( $4 ); }
2300	\| '(' old_function_array ')' // redundant parenthesis
2301	{ $$ = $2; }
2302	;
2303
2304	// This pattern parses a declaration for a variable or function prototype that redefines a type name, e.g.:
2305	//
2306	// typedef int foo;
2307	// {
2308	// int foo; // redefine typedef name in new scope
2309	// }
2310	//
2311	// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
2312	// and functions versus pointers to arrays and functions.
2313
2314	variable_type_redeclarator:
2315	paren_type attribute_list_opt
2316	{ $$ = $1->addQualifiers( $2 ); }
2317	\| type_ptr
2318	\| type_array attribute_list_opt
2319	{ $$ = $1->addQualifiers( $2 ); }
2320	\| type_function attribute_list_opt
2321	{ $$ = $1->addQualifiers( $2 ); }
2322	;
2323
2324	paren_type:
2325	typedef
2326	\| '(' paren_type ')'
2327	{ $$ = $2; }
2328	;
2329
2330	type_ptr:
2331	ptrref_operator variable_type_redeclarator
2332	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2333	\| ptrref_operator type_qualifier_list variable_type_redeclarator
2334	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2335	\| '(' type_ptr ')'
2336	{ $$ = $2; }
2337	;
2338
2339	type_array:
2340	paren_type array_dimension
2341	{ $$ = $1->addArray( $2 ); }
2342	\| '(' type_ptr ')' array_dimension
2343	{ $$ = $2->addArray( $4 ); }
2344	\| '(' type_array ')' multi_array_dimension // redundant parenthesis
2345	{ $$ = $2->addArray( $4 ); }
2346	\| '(' type_array ')' // redundant parenthesis
2347	{ $$ = $2; }
2348	;
2349
2350	type_function:
2351	paren_type '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2352	{ $$ = $1->addParamList( $4 ); }
2353	\| '(' type_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2354	{ $$ = $2->addParamList( $6 ); }
2355	\| '(' type_function ')' // redundant parenthesis
2356	{ $$ = $2; }
2357	;
2358
2359	// This pattern parses a declaration for a parameter variable or function prototype that is not redefining a typedef
2360	// name and allows the C99 array options, which can only appear in a parameter list. The pattern precludes declaring an
2361	// array of functions versus a pointer to an array of functions, and returning arrays and functions versus pointers to
2362	// arrays and functions.
2363
2364	identifier_parameter_declarator:
2365	paren_identifier attribute_list_opt
2366	{ $$ = $1->addQualifiers( $2 ); }
2367	\| identifier_parameter_ptr
2368	\| identifier_parameter_array attribute_list_opt
2369	{ $$ = $1->addQualifiers( $2 ); }
2370	\| identifier_parameter_function attribute_list_opt
2371	{ $$ = $1->addQualifiers( $2 ); }
2372	;
2373
2374	identifier_parameter_ptr:
2375	ptrref_operator identifier_parameter_declarator
2376	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2377	\| ptrref_operator type_qualifier_list identifier_parameter_declarator
2378	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2379	\| '(' identifier_parameter_ptr ')'
2380	{ $$ = $2; }
2381	;
2382
2383	identifier_parameter_array:
2384	paren_identifier array_parameter_dimension
2385	{ $$ = $1->addArray( $2 ); }
2386	\| '(' identifier_parameter_ptr ')' array_dimension
2387	{ $$ = $2->addArray( $4 ); }
2388	\| '(' identifier_parameter_array ')' multi_array_dimension // redundant parenthesis
2389	{ $$ = $2->addArray( $4 ); }
2390	\| '(' identifier_parameter_array ')' // redundant parenthesis
2391	{ $$ = $2; }
2392	;
2393
2394	identifier_parameter_function:
2395	paren_identifier '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2396	{ $$ = $1->addParamList( $4 ); }
2397	\| '(' identifier_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2398	{ $$ = $2->addParamList( $6 ); }
2399	\| '(' identifier_parameter_function ')' // redundant parenthesis
2400	{ $$ = $2; }
2401	;
2402
2403	// This pattern parses a declaration for a parameter variable or function prototype that is redefining a typedef name,
2404	// e.g.:
2405	//
2406	// typedef int foo;
2407	// int f( int foo ); // redefine typedef name in new scope
2408	//
2409	// and allows the C99 array options, which can only appear in a parameter list. In addition, the pattern handles the
2410	// special meaning of parenthesis around a typedef name:
2411	//
2412	// ISO/IEC 9899:1999 Section 6.7.5.3(11) : "In a parameter declaration, a single typedef name in
2413	// parentheses is taken to be an abstract declarator that specifies a function with a single parameter,
2414	// not as redundant parentheses around the identifier."
2415	//
2416	// For example:
2417	//
2418	// typedef float T;
2419	// int f( int ( T [5] ) ); // see abstract_parameter_declarator
2420	// int g( int ( T ( int ) ) ); // see abstract_parameter_declarator
2421	// int f( int f1( T a[5] ) ); // see identifier_parameter_declarator
2422	// int g( int g1( T g2( int p ) ) ); // see identifier_parameter_declarator
2423	//
2424	// In essence, a '(' immediately to the left of typedef name, T, is interpreted as starting a parameter type list, and
2425	// not as redundant parentheses around a redeclaration of T. Finally, the pattern also precludes declaring an array of
2426	// functions versus a pointer to an array of functions, and returning arrays and functions versus pointers to arrays and
2427	// functions.
2428
2429	type_parameter_redeclarator:
2430	typedef attribute_list_opt
2431	{ $$ = $1->addQualifiers( $2 ); }
2432	\| type_parameter_ptr
2433	\| type_parameter_array attribute_list_opt
2434	{ $$ = $1->addQualifiers( $2 ); }
2435	\| type_parameter_function attribute_list_opt
2436	{ $$ = $1->addQualifiers( $2 ); }
2437	;
2438
2439	typedef:
2440	TYPEDEFname
2441	{
2442	typedefTable.setNextIdentifier( *$1 );
2443	$$ = DeclarationNode::newName( $1 );
2444	}
2445	\| TYPEGENname
2446	{
2447	typedefTable.setNextIdentifier( *$1 );
2448	$$ = DeclarationNode::newName( $1 );
2449	}
2450	;
2451
2452	type_parameter_ptr:
2453	ptrref_operator type_parameter_redeclarator
2454	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2455	\| ptrref_operator type_qualifier_list type_parameter_redeclarator
2456	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2457	\| '(' type_parameter_ptr ')'
2458	{ $$ = $2; }
2459	;
2460
2461	type_parameter_array:
2462	typedef array_parameter_dimension
2463	{ $$ = $1->addArray( $2 ); }
2464	\| '(' type_parameter_ptr ')' array_parameter_dimension
2465	{ $$ = $2->addArray( $4 ); }
2466	;
2467
2468	type_parameter_function:
2469	typedef '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2470	{ $$ = $1->addParamList( $4 ); }
2471	\| '(' type_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2472	{ $$ = $2->addParamList( $6 ); }
2473	;
2474
2475	// This pattern parses a declaration of an abstract variable or function prototype, i.e., there is no identifier to
2476	// which the type applies, e.g.:
2477	//
2478	// sizeof( int );
2479	// sizeof( int [10] );
2480	//
2481	// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
2482	// and functions versus pointers to arrays and functions.
2483
2484	abstract_declarator:
2485	abstract_ptr
2486	\| abstract_array attribute_list_opt
2487	{ $$ = $1->addQualifiers( $2 ); }
2488	\| abstract_function attribute_list_opt
2489	{ $$ = $1->addQualifiers( $2 ); }
2490	;
2491
2492	abstract_ptr:
2493	ptrref_operator
2494	{ $$ = DeclarationNode::newPointer( 0 ); }
2495	\| ptrref_operator type_qualifier_list
2496	{ $$ = DeclarationNode::newPointer( $2 ); }
2497	\| ptrref_operator abstract_declarator
2498	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2499	\| ptrref_operator type_qualifier_list abstract_declarator
2500	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2501	\| '(' abstract_ptr ')'
2502	{ $$ = $2; }
2503	;
2504
2505	abstract_array:
2506	array_dimension
2507	\| '(' abstract_ptr ')' array_dimension
2508	{ $$ = $2->addArray( $4 ); }
2509	\| '(' abstract_array ')' multi_array_dimension // redundant parenthesis
2510	{ $$ = $2->addArray( $4 ); }
2511	\| '(' abstract_array ')' // redundant parenthesis
2512	{ $$ = $2; }
2513	;
2514
2515	abstract_function:
2516	'(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2517	{ $$ = DeclarationNode::newFunction( 0, 0, $3, 0 ); }
2518	\| '(' abstract_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2519	{ $$ = $2->addParamList( $6 ); }
2520	\| '(' abstract_function ')' // redundant parenthesis
2521	{ $$ = $2; }
2522	;
2523
2524	array_dimension:
2525	// Only the first dimension can be empty.
2526	'[' ']'
2527	{ $$ = DeclarationNode::newArray( 0, 0, false ); }
2528	\| '[' ']' multi_array_dimension
2529	{ $$ = DeclarationNode::newArray( 0, 0, false )->addArray( $3 ); }
2530	\| multi_array_dimension
2531	;
2532
2533	multi_array_dimension:
2534	'[' push assignment_expression pop ']'
2535	{ $$ = DeclarationNode::newArray( $3, 0, false ); }
2536	\| '[' push '*' pop ']' // C99
2537	{ $$ = DeclarationNode::newVarArray( 0 ); }
2538	\| multi_array_dimension '[' push assignment_expression pop ']'
2539	{ $$ = $1->addArray( DeclarationNode::newArray( $4, 0, false ) ); }
2540	\| multi_array_dimension '[' push '*' pop ']' // C99
2541	{ $$ = $1->addArray( DeclarationNode::newVarArray( 0 ) ); }
2542	;
2543
2544	// This pattern parses a declaration of a parameter abstract variable or function prototype, i.e., there is no
2545	// identifier to which the type applies, e.g.:
2546	//
2547	// int f( int ); // abstract variable parameter; no parameter name specified
2548	// int f( int (int) ); // abstract function-prototype parameter; no parameter name specified
2549	//
2550	// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
2551	// and functions versus pointers to arrays and functions.
2552
2553	abstract_parameter_declarator:
2554	abstract_parameter_ptr
2555	\| abstract_parameter_array attribute_list_opt
2556	{ $$ = $1->addQualifiers( $2 ); }
2557	\| abstract_parameter_function attribute_list_opt
2558	{ $$ = $1->addQualifiers( $2 ); }
2559	;
2560
2561	abstract_parameter_ptr:
2562	ptrref_operator
2563	{ $$ = DeclarationNode::newPointer( 0 ); }
2564	\| ptrref_operator type_qualifier_list
2565	{ $$ = DeclarationNode::newPointer( $2 ); }
2566	\| ptrref_operator abstract_parameter_declarator
2567	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2568	\| ptrref_operator type_qualifier_list abstract_parameter_declarator
2569	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2570	\| '(' abstract_parameter_ptr ')'
2571	{ $$ = $2; }
2572	;
2573
2574	abstract_parameter_array:
2575	array_parameter_dimension
2576	\| '(' abstract_parameter_ptr ')' array_parameter_dimension
2577	{ $$ = $2->addArray( $4 ); }
2578	\| '(' abstract_parameter_array ')' multi_array_dimension // redundant parenthesis
2579	{ $$ = $2->addArray( $4 ); }
2580	\| '(' abstract_parameter_array ')' // redundant parenthesis
2581	{ $$ = $2; }
2582	;
2583
2584	abstract_parameter_function:
2585	'(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2586	{ $$ = DeclarationNode::newFunction( 0, 0, $3, 0 ); }
2587	\| '(' abstract_parameter_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2588	{ $$ = $2->addParamList( $6 ); }
2589	\| '(' abstract_parameter_function ')' // redundant parenthesis
2590	{ $$ = $2; }
2591	;
2592
2593	array_parameter_dimension:
2594	// Only the first dimension can be empty or have qualifiers.
2595	array_parameter_1st_dimension
2596	\| array_parameter_1st_dimension multi_array_dimension
2597	{ $$ = $1->addArray( $2 ); }
2598	\| multi_array_dimension
2599	;
2600
2601	// The declaration of an array parameter has additional syntax over arrays in normal variable declarations:
2602	//
2603	// ISO/IEC 9899:1999 Section 6.7.5.2(1) : "The optional type qualifiers and the keyword static shall appear only in
2604	// a declaration of a function parameter with an array type, and then only in the outermost array type derivation."
2605
2606	array_parameter_1st_dimension:
2607	'[' ']'
2608	{ $$ = DeclarationNode::newArray( 0, 0, false ); }
2609	// multi_array_dimension handles the '[' '*' ']' case
2610	\| '[' push type_qualifier_list '*' pop ']' // remaining C99
2611	{ $$ = DeclarationNode::newVarArray( $3 ); }
2612	\| '[' push type_qualifier_list pop ']'
2613	{ $$ = DeclarationNode::newArray( 0, $3, false ); }
2614	// multi_array_dimension handles the '[' assignment_expression ']' case
2615	\| '[' push type_qualifier_list assignment_expression pop ']'
2616	{ $$ = DeclarationNode::newArray( $4, $3, false ); }
2617	\| '[' push STATIC type_qualifier_list_opt assignment_expression pop ']'
2618	{ $$ = DeclarationNode::newArray( $5, $4, true ); }
2619	\| '[' push type_qualifier_list STATIC assignment_expression pop ']'
2620	{ $$ = DeclarationNode::newArray( $5, $3, true ); }
2621	;
2622
2623	// This pattern parses a declaration of an abstract variable, i.e., there is no identifier to which the type applies,
2624	// e.g.:
2625	//
2626	// sizeof( int ); // abstract variable; no identifier name specified
2627	//
2628	// The pattern precludes declaring an array of functions versus a pointer to an array of functions, and returning arrays
2629	// and functions versus pointers to arrays and functions.
2630
2631	variable_abstract_declarator:
2632	variable_abstract_ptr
2633	\| variable_abstract_array attribute_list_opt
2634	{ $$ = $1->addQualifiers( $2 ); }
2635	\| variable_abstract_function attribute_list_opt
2636	{ $$ = $1->addQualifiers( $2 ); }
2637	;
2638
2639	variable_abstract_ptr:
2640	ptrref_operator
2641	{ $$ = DeclarationNode::newPointer( 0 ); }
2642	\| ptrref_operator type_qualifier_list
2643	{ $$ = DeclarationNode::newPointer( $2 ); }
2644	\| ptrref_operator variable_abstract_declarator
2645	{ $$ = $2->addPointer( DeclarationNode::newPointer( 0 ) ); }
2646	\| ptrref_operator type_qualifier_list variable_abstract_declarator
2647	{ $$ = $3->addPointer( DeclarationNode::newPointer( $2 ) ); }
2648	\| '(' variable_abstract_ptr ')'
2649	{ $$ = $2; }
2650	;
2651
2652	variable_abstract_array:
2653	array_dimension
2654	\| '(' variable_abstract_ptr ')' array_dimension
2655	{ $$ = $2->addArray( $4 ); }
2656	\| '(' variable_abstract_array ')' multi_array_dimension // redundant parenthesis
2657	{ $$ = $2->addArray( $4 ); }
2658	\| '(' variable_abstract_array ')' // redundant parenthesis
2659	{ $$ = $2; }
2660	;
2661
2662	variable_abstract_function:
2663	'(' variable_abstract_ptr ')' '(' push parameter_type_list_opt pop ')' // empty parameter list OBSOLESCENT (see 3)
2664	{ $$ = $2->addParamList( $6 ); }
2665	\| '(' variable_abstract_function ')' // redundant parenthesis
2666	{ $$ = $2; }
2667	;
2668
2669	// This pattern parses a new-style declaration for a parameter variable or function prototype that is either an
2670	// identifier or typedef name and allows the C99 array options, which can only appear in a parameter list.
2671
2672	new_identifier_parameter_declarator_tuple: // CFA
2673	new_identifier_parameter_declarator_no_tuple
2674	\| new_abstract_tuple
2675	\| type_qualifier_list new_abstract_tuple
2676	{ $$ = $2->addQualifiers( $1 ); }
2677	;
2678
2679	new_identifier_parameter_declarator_no_tuple: // CFA
2680	new_identifier_parameter_ptr
2681	\| new_identifier_parameter_array
2682	;
2683
2684	new_identifier_parameter_ptr: // CFA
2685	ptrref_operator type_specifier
2686	{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0 ) ); }
2687	\| type_qualifier_list ptrref_operator type_specifier
2688	{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1 ) ); }
2689	\| ptrref_operator new_abstract_function
2690	{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0 ) ); }
2691	\| type_qualifier_list ptrref_operator new_abstract_function
2692	{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1 ) ); }
2693	\| ptrref_operator new_identifier_parameter_declarator_tuple
2694	{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0 ) ); }
2695	\| type_qualifier_list ptrref_operator new_identifier_parameter_declarator_tuple
2696	{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1 ) ); }
2697	;
2698
2699	new_identifier_parameter_array: // CFA
2700	// Only the first dimension can be empty or have qualifiers. Empty dimension must be factored out due to
2701	// shift/reduce conflict with new-style empty (void) function return type.
2702	'[' ']' type_specifier
2703	{ $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
2704	\| new_array_parameter_1st_dimension type_specifier
2705	{ $$ = $2->addNewArray( $1 ); }
2706	\| '[' ']' multi_array_dimension type_specifier
2707	{ $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
2708	\| new_array_parameter_1st_dimension multi_array_dimension type_specifier
2709	{ $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
2710	\| multi_array_dimension type_specifier
2711	{ $$ = $2->addNewArray( $1 ); }
2712	\| '[' ']' new_identifier_parameter_ptr
2713	{ $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
2714	\| new_array_parameter_1st_dimension new_identifier_parameter_ptr
2715	{ $$ = $2->addNewArray( $1 ); }
2716	\| '[' ']' multi_array_dimension new_identifier_parameter_ptr
2717	{ $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
2718	\| new_array_parameter_1st_dimension multi_array_dimension new_identifier_parameter_ptr
2719	{ $$ = $3->addNewArray( $2 )->addNewArray( $1 ); }
2720	\| multi_array_dimension new_identifier_parameter_ptr
2721	{ $$ = $2->addNewArray( $1 ); }
2722	;
2723
2724	new_array_parameter_1st_dimension:
2725	'[' push type_qualifier_list '*' pop ']' // remaining C99
2726	{ $$ = DeclarationNode::newVarArray( $3 ); }
2727	\| '[' push type_qualifier_list assignment_expression pop ']'
2728	{ $$ = DeclarationNode::newArray( $4, $3, false ); }
2729	\| '[' push declaration_qualifier_list assignment_expression pop ']'
2730	// declaration_qualifier_list must be used because of shift/reduce conflict with
2731	// assignment_expression, so a semantic check is necessary to preclude them as a type_qualifier cannot
2732	// appear in this context.
2733	{ $$ = DeclarationNode::newArray( $4, $3, true ); }
2734	\| '[' push declaration_qualifier_list type_qualifier_list assignment_expression pop ']'
2735	{ $$ = DeclarationNode::newArray( $5, $4->addQualifiers( $3 ), true ); }
2736	;
2737
2738	// This pattern parses a new-style declaration of an abstract variable or function prototype, i.e., there is no
2739	// identifier to which the type applies, e.g.:
2740	//
2741	// [int] f( int ); // abstract variable parameter; no parameter name specified
2742	// [int] f( [int] (int) ); // abstract function-prototype parameter; no parameter name specified
2743	//
2744	// These rules need LR(3):
2745	//
2746	// new_abstract_tuple identifier_or_type_name
2747	// '[' new_parameter_list ']' identifier_or_type_name '(' new_parameter_type_list_opt ')'
2748	//
2749	// since a function return type can be syntactically identical to a tuple type:
2750	//
2751	// [int, int] t;
2752	// [int, int] f( int );
2753	//
2754	// Therefore, it is necessary to look at the token after identifier_or_type_name to know when to reduce
2755	// new_abstract_tuple. To make this LR(1), several rules have to be flattened (lengthened) to allow the necessary
2756	// lookahead. To accomplish this, new_abstract_declarator has an entry point without tuple, and tuple declarations are
2757	// duplicated when appearing with new_function_specifier.
2758
2759	new_abstract_declarator_tuple: // CFA
2760	new_abstract_tuple
2761	\| type_qualifier_list new_abstract_tuple
2762	{ $$ = $2->addQualifiers( $1 ); }
2763	\| new_abstract_declarator_no_tuple
2764	;
2765
2766	new_abstract_declarator_no_tuple: // CFA
2767	new_abstract_ptr
2768	\| new_abstract_array
2769	;
2770
2771	new_abstract_ptr: // CFA
2772	ptrref_operator type_specifier
2773	{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0 ) ); }
2774	\| type_qualifier_list ptrref_operator type_specifier
2775	{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1 ) ); }
2776	\| ptrref_operator new_abstract_function
2777	{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0 ) ); }
2778	\| type_qualifier_list ptrref_operator new_abstract_function
2779	{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1 ) ); }
2780	\| ptrref_operator new_abstract_declarator_tuple
2781	{ $$ = $2->addNewPointer( DeclarationNode::newPointer( 0 ) ); }
2782	\| type_qualifier_list ptrref_operator new_abstract_declarator_tuple
2783	{ $$ = $3->addNewPointer( DeclarationNode::newPointer( $1 ) ); }
2784	;
2785
2786	new_abstract_array: // CFA
2787	// Only the first dimension can be empty. Empty dimension must be factored out due to shift/reduce conflict with
2788	// empty (void) function return type.
2789	'[' ']' type_specifier
2790	{ $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
2791	\| '[' ']' multi_array_dimension type_specifier
2792	{ $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
2793	\| multi_array_dimension type_specifier
2794	{ $$ = $2->addNewArray( $1 ); }
2795	\| '[' ']' new_abstract_ptr
2796	{ $$ = $3->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
2797	\| '[' ']' multi_array_dimension new_abstract_ptr
2798	{ $$ = $4->addNewArray( $3 )->addNewArray( DeclarationNode::newArray( 0, 0, false ) ); }
2799	\| multi_array_dimension new_abstract_ptr
2800	{ $$ = $2->addNewArray( $1 ); }
2801	;
2802
2803	new_abstract_tuple: // CFA
2804	'[' push new_abstract_parameter_list pop ']'
2805	{ $$ = DeclarationNode::newTuple( $3 ); }
2806	;
2807
2808	new_abstract_function: // CFA
2809	'[' ']' '(' new_parameter_type_list_opt ')'
2810	{ $$ = DeclarationNode::newFunction( 0, DeclarationNode::newTuple( 0 ), $4, 0 ); }
2811	\| new_abstract_tuple '(' push new_parameter_type_list_opt pop ')'
2812	{ $$ = DeclarationNode::newFunction( 0, $1, $4, 0 ); }
2813	\| new_function_return '(' push new_parameter_type_list_opt pop ')'
2814	{ $$ = DeclarationNode::newFunction( 0, $1, $4, 0 ); }
2815	;
2816
2817	// 1) ISO/IEC 9899:1999 Section 6.7.2(2) : "At least one type specifier shall be given in the declaration specifiers in
2818	// each declaration, and in the specifier-qualifier list in each structure declaration and type name."
2819	//
2820	// 2) ISO/IEC 9899:1999 Section 6.11.5(1) : "The placement of a storage-class specifier other than at the beginning of
2821	// the declaration specifiers in a declaration is an obsolescent feature."
2822	//
2823	// 3) ISO/IEC 9899:1999 Section 6.11.6(1) : "The use of function declarators with empty parentheses (not
2824	// prototype-format parameter type declarators) is an obsolescent feature."
2825	//
2826	// 4) ISO/IEC 9899:1999 Section 6.11.7(1) : "The use of function definitions with separate parameter identifier and
2827	// declaration lists (not prototype-format parameter type and identifier declarators) is an obsolescent feature.
2828
2829	//*********************** MISCELLANEOUS ******************************
2830
2831	comma_opt: // redundant comma
2832	// empty
2833	\| ','
2834	;
2835
2836	assignment_opt:
2837	// empty
2838	{ $$ = 0; }
2839	\| '=' assignment_expression
2840	{ $$ = $2; }
2841	;
2842
2843	%%
2844	// ----end of grammar----
2845
2846	void yyerror( const char * ) {
2847	std::cout << "Error ";
2848	if ( yyfilename ) {
2849	std::cout << "in file " << yyfilename << " ";
2850	} // if
2851	std::cout << "at line " << yylineno << " reading token \"" << (yytext[0] == '\0' ? "EOF" : yytext) << "\"" << std::endl;
2852	}
2853
2854	// Local Variables: //
2855	// mode: c++ //
2856	// tab-width: 4 //
2857	// compile-command: "make install" //
2858	// End: //

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