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source: src/Parser/ExpressionNode.cc@ 5aa708c

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Last change on this file since 5aa708c was 1869adf, checked in by Rob Schluntz <rschlunt@…>, 10 years ago
fix label name in label address expression
Property mode set to `100644`
File size: 22.9 KB

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1	//
2	// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
3	//
4	// The contents of this file are covered under the licence agreement in the
5	// file "LICENCE" distributed with Cforall.
6	//
7	// ExpressionNode.cc --
8	//
9	// Author : Rodolfo G. Esteves
10	// Created On : Sat May 16 13:17:07 2015
11	// Last Modified By : Rob Schluntz
12	// Last Modified On : Wed Jun 24 16:20:00 2015
13	// Update Count : 158
14	//
15
16	#include <cassert>
17	#include <cctype>
18	#include <algorithm>
19	#include <sstream>
20	#include <cstdio>
21	#include <climits>
22
23	#include "ParseNode.h"
24	#include "SynTree/Constant.h"
25	#include "SynTree/Expression.h"
26	#include "UnimplementedError.h"
27	#include "parseutility.h"
28	#include "utility.h"
29
30	using namespace std;
31
32	ExpressionNode::ExpressionNode() : ParseNode(), argName( 0 ) {}
33
34	ExpressionNode::ExpressionNode( const string *name_ ) : ParseNode( name_ ), argName( 0 ) {}
35
36	ExpressionNode::ExpressionNode( const ExpressionNode &other ) : ParseNode( other.name ) {
37	if ( other.argName ) {
38	argName = other.argName->clone();
39	} else {
40	argName = 0;
41	} // if
42	}
43
44	ExpressionNode * ExpressionNode::set_asArgName( const std::string *aName ) {
45	argName = new VarRefNode( aName );
46	return this;
47	}
48
49	ExpressionNode * ExpressionNode::set_asArgName( ExpressionNode *aDesignator ) {
50	argName = aDesignator;
51	return this;
52	}
53
54	void ExpressionNode::printDesignation( std::ostream &os, int indent ) const {
55	if ( argName ) {
56	os << string( indent, ' ' ) << "(designated by: ";
57	argName->printOneLine( os, indent );
58	os << ")" << std::endl;
59	} // if
60	}
61
62	//##############################################################################
63
64	NullExprNode::NullExprNode() {}
65
66	NullExprNode *NullExprNode::clone() const {
67	return new NullExprNode();
68	}
69
70	void NullExprNode::print( std::ostream & os, int indent ) const {
71	printDesignation( os );
72	os << "null expression";
73	}
74
75	void NullExprNode::printOneLine( std::ostream & os, int indent ) const {
76	printDesignation( os );
77	os << "null";
78	}
79
80	Expression *NullExprNode::build() const {
81	return 0;
82	}
83
84	CommaExprNode ExpressionNode::add_to_list( ExpressionNode exp ) {
85	return new CommaExprNode( this, exp );
86	}
87
88	//##############################################################################
89
90	static inline bool checkU( char c ) { return c == 'u' \|\| c == 'U'; }
91	static inline bool checkL( char c ) { return c == 'l' \|\| c == 'L'; }
92	static inline bool checkF( char c ) { return c == 'f' \|\| c == 'F'; }
93	static inline bool checkX( char c ) { return c == 'x' \|\| c == 'X'; }
94
95	// Difficult to separate extra parts of constants during lexing because actions are not allow in the middle of patterns:
96	//
97	// prefix action constant action suffix
98	//
99	// Alternatively, breaking a pattern using BEGIN does not work if the following pattern can be empty:
100	//
101	// constant BEGIN CONT ...
102	// <CONT>(...)? BEGIN 0 ... // possible empty suffix
103	//
104	// because the CONT rule is NOT triggered if the pattern is empty. Hence, constants are reparsed here to determine their
105	// type.
106
107	ConstantNode::ConstantNode( Type t, string inVal ) : type( t ), value( inVal ) {
108	// lexing divides constants into 4 kinds
109	switch ( type ) {
110	case Integer:
111	{
112	static const BasicType::Kind kind[2][3] = {
113	{ BasicType::SignedInt, BasicType::LongSignedInt, BasicType::LongLongSignedInt },
114	{ BasicType::UnsignedInt, BasicType::LongUnsignedInt, BasicType::LongLongUnsignedInt },
115	};
116	size_t last = value.length() - 1; // last character of constant
117	unsigned long long v; // converted integral value
118	bool dec = true, Unsigned = false; // decimal, unsigned constant
119	int size; // 0 => int, 1 => long, 2 => long long
120
121	if ( value[0] == '0' ) { // octal constant ?
122	dec = false;
123	if ( last != 0 && checkX( value[1] ) ) { // hex constant ?
124	sscanf( (char *)value.c_str(), "%llx", &v );
125	//printf( "%llx %llu\n", v, v );
126	} else {
127	sscanf( (char *)value.c_str(), "%llo", &v );
128	//printf( "%llo %llu\n", v, v );
129	} // if
130	} else { // decimal constant ?
131	sscanf( (char *)value.c_str(), "%llu", &v );
132	//printf( "%llu %llu\n", v, v );
133	} // if
134
135	if ( v <= INT_MAX ) { // signed int
136	size = 0;
137	} else if ( v <= UINT_MAX && ! dec ) { // unsigned int
138	size = 0;
139	Unsigned = true; // unsigned
140	} else if ( v <= LONG_MAX ) { // signed long int
141	size = 1;
142	} else if ( v <= ULONG_MAX && ( ! dec \|\| LONG_MAX == LLONG_MAX ) ) { // signed long int
143	size = 1;
144	Unsigned = true; // unsigned long int
145	} else if ( v <= LLONG_MAX ) { // signed long long int
146	size = 2;
147	} else { // unsigned long long int
148	size = 2;
149	Unsigned = true; // unsigned long long int
150	} // if
151
152	if ( checkU( value[last] ) ) { // suffix 'u' ?
153	Unsigned = true;
154	if ( last > 0 && checkL( value[ last - 1 ] ) ) { // suffix 'l' ?
155	size = 1;
156	if ( last > 1 && checkL( value[ last - 2 ] ) ) { // suffix 'll' ?
157	size = 2;
158	} // if
159	} // if
160	} else if ( checkL( value[ last ] ) ) { // suffix 'l' ?
161	size = 1;
162	if ( last > 0 && checkL( value[ last - 1 ] ) ) { // suffix 'll' ?
163	size = 2;
164	if ( last > 1 && checkU( value[ last - 2 ] ) ) { // suffix 'u' ?
165	Unsigned = true;
166	} // if
167	} else {
168	if ( last > 0 && checkU( value[ last - 1 ] ) ) { // suffix 'u' ?
169	Unsigned = true;
170	} // if
171	} // if
172	} // if
173	btype = kind[Unsigned][size]; // lookup constant type
174	break;
175	}
176	case Float:
177	{
178	size_t len = value.length() - 1;
179
180	btype = BasicType::Double; // default
181	if ( checkF( value[len] ) ) { // float ?
182	btype = BasicType::Float;
183	} // if
184	if ( checkL( value[len] ) ) { // long double ?
185	btype = BasicType::LongDouble;
186	} // if
187	break;
188	}
189	case Character:
190	btype = BasicType::Char; // default
191	if ( string( "LUu" ).find( value[0] ) != string::npos ) {
192	// ???
193	} // if
194	break;
195	case String:
196	// array of char
197	if ( string( "LUu" ).find( value[0] ) != string::npos ) {
198	if ( value[0] == 'u' && value[1] == '8' ) {
199	// ???
200	} else {
201	// ???
202	} // if
203	} // if
204	break;
205	} // switch
206	} // ConstantNode::ConstantNode
207
208	ConstantNode ConstantNode::appendstr( const std::string newValue ) {
209	assert( newValue != 0 );
210	assert( type == String );
211
212	// "abc" "def" "ghi" => "abcdefghi", so remove new text from quotes and insert before last quote in old string.
213	value.insert( value.length() - 1, newValue->substr( 1, newValue->length() - 2 ) );
214
215	delete newValue; // allocated by lexer
216	return this;
217	}
218
219	void ConstantNode::printOneLine( std::ostream &os, int indent ) const {
220	os << string( indent, ' ' );
221	printDesignation( os );
222
223	switch ( type ) {
224	case Integer:
225	case Float:
226	os << value ;
227	break;
228	case Character:
229	os << "'" << value << "'";
230	break;
231	case String:
232	os << '"' << value << '"';
233	break;
234	} // switch
235
236	os << ' ';
237	}
238
239	void ConstantNode::print( std::ostream &os, int indent ) const {
240	printOneLine( os, indent );
241	os << endl;
242	}
243
244	Expression *ConstantNode::build() const {
245	::Type::Qualifiers q; // no qualifiers on constants
246
247	switch ( get_type() ) {
248	case String:
249	{
250	// string should probably be a primitive type
251	ArrayType *at = new ArrayType( q, new BasicType( q, BasicType::Char ),
252	new ConstantExpr(
253	Constant( new BasicType( q, BasicType::UnsignedInt ),
254	toString( value.size()+1-2 ) ) ), // +1 for '\0' and -2 for '"'
255	false, false );
256	return new ConstantExpr( Constant( at, value ), maybeBuild< Expression >( get_argName() ) );
257	}
258	default:
259	return new ConstantExpr( Constant( new BasicType( q, btype ), get_value() ), maybeBuild< Expression >( get_argName() ) );
260	}
261	}
262
263	//##############################################################################
264
265	VarRefNode::VarRefNode() : isLabel( false ) {}
266
267	VarRefNode::VarRefNode( const string *name_, bool labelp ) : ExpressionNode( name_ ), isLabel( labelp ) {}
268
269	VarRefNode::VarRefNode( const VarRefNode &other ) : ExpressionNode( other ), isLabel( other.isLabel ) {
270	}
271
272	Expression *VarRefNode::build() const {
273	return new NameExpr( get_name(), maybeBuild< Expression >( get_argName() ) );
274	}
275
276	void VarRefNode::printOneLine( std::ostream &os, int indent ) const {
277	printDesignation( os );
278	os << get_name() << ' ';
279	}
280
281	void VarRefNode::print( std::ostream &os, int indent ) const {
282	printDesignation( os );
283	os << string( indent, ' ' ) << "Referencing: ";
284	os << "Variable: " << get_name();
285	os << endl;
286	}
287
288	//##############################################################################
289
290	OperatorNode::OperatorNode( Type t ) : type( t ) {}
291
292	OperatorNode::OperatorNode( const OperatorNode &other ) : ExpressionNode( other ), type( other.type ) {
293	}
294
295	OperatorNode::~OperatorNode() {}
296
297	OperatorNode::Type OperatorNode::get_type( void ) const{
298	return type;
299	}
300
301	void OperatorNode::printOneLine( std::ostream &os, int indent ) const {
302	printDesignation( os );
303	os << OpName[ type ] << ' ';
304	}
305
306	void OperatorNode::print( std::ostream &os, int indent ) const{
307	printDesignation( os );
308	os << string( indent, ' ' ) << "Operator: " << OpName[type] << endl;
309	return;
310	}
311
312	const char *OperatorNode::get_typename( void ) const{
313	return OpName[ type ];
314	}
315
316	const char *OperatorNode::OpName[] = {
317	"TupleC", "Comma", "TupleFieldSel",// "TuplePFieldSel", //n-adic
318	// triadic
319	"Cond", "NCond",
320	// diadic
321	"SizeOf", "AlignOf", "Attr", "CompLit", "Plus", "Minus", "Mul", "Div", "Mod", "Or",
322	"And", "BitOr", "BitAnd", "Xor", "Cast", "LShift", "RShift", "LThan", "GThan",
323	"LEThan", "GEThan", "Eq", "Neq", "Assign", "MulAssn", "DivAssn", "ModAssn", "PlusAssn",
324	"MinusAssn", "LSAssn", "RSAssn", "AndAssn", "ERAssn", "OrAssn", "Index", "FieldSel","PFieldSel",
325	"Range",
326	// monadic
327	"UnPlus", "UnMinus", "AddressOf", "PointTo", "Neg", "BitNeg", "Incr", "IncrPost", "Decr", "DecrPost", "LabelAddress"
328	};
329
330	//##############################################################################
331
332	CompositeExprNode::CompositeExprNode( void ) : ExpressionNode(), function( 0 ), arguments( 0 ) {
333	}
334
335	CompositeExprNode::CompositeExprNode( const string *name_ ) : ExpressionNode( name_ ), function( 0 ), arguments( 0 ) {
336	}
337
338	CompositeExprNode::CompositeExprNode( ExpressionNode f, ExpressionNode args ):
339	function( f ), arguments( args ) {
340	}
341
342	CompositeExprNode::CompositeExprNode( ExpressionNode f, ExpressionNode arg1, ExpressionNode *arg2):
343	function( f ), arguments( arg1) {
344	arguments->set_link( arg2);
345	}
346
347	CompositeExprNode::CompositeExprNode( const CompositeExprNode &other ) : ExpressionNode( other ), function( maybeClone( other.function ) ) {
348	ParseNode *cur = other.arguments;
349	while ( cur ) {
350	if ( arguments ) {
351	arguments->set_link( cur->clone() );
352	} else {
353	arguments = ( ExpressionNode*)cur->clone();
354	} // if
355	cur = cur->get_link();
356	}
357	}
358
359	CompositeExprNode::~CompositeExprNode() {
360	delete function;
361	delete arguments;
362	}
363
364	// the names that users use to define operator functions
365	static const char *opFuncName[] = {
366	"", "", "",
367	"", "",
368	//diadic
369	"", "", "", "", "?+?", "?-?", "?*?", "?/?", "?%?", "", "",
370	"?\|?", "?&?", "?^?", "", "?<<?", "?>>?", "?<?", "?>?", "?<=?",
371	"?>=?", "?==?", "?!=?", "?=?", "?*=?", "?/=?", "?%=?", "?+=?", "?-=?",
372	"?<<=?", "?>>=?", "?&=?", "?^=?", "?\|=?", "?[?]", "", "", "Range",
373	//monadic
374	"+?", "-?", "", "*?", "!?", "~?", "++?", "?++", "--?", "?--", "&&"
375	};
376
377	#include "utility.h"
378
379	Expression *CompositeExprNode::build() const {
380	OperatorNode *op;
381	std::list<Expression *> args;
382
383	buildList( get_args(), args );
384
385	if ( ! ( op = dynamic_cast<OperatorNode *>( function ) ) ) { // function as opposed to operator
386	return new UntypedExpr( function->build(), args, maybeBuild< Expression >( get_argName() ));
387	} // if
388
389	switch ( op->get_type()) {
390	case OperatorNode::Incr:
391	case OperatorNode::Decr:
392	case OperatorNode::IncrPost:
393	case OperatorNode::DecrPost:
394	case OperatorNode::Assign:
395	case OperatorNode::MulAssn:
396	case OperatorNode::DivAssn:
397	case OperatorNode::ModAssn:
398	case OperatorNode::PlusAssn:
399	case OperatorNode::MinusAssn:
400	case OperatorNode::LSAssn:
401	case OperatorNode::RSAssn:
402	case OperatorNode::AndAssn:
403	case OperatorNode::ERAssn:
404	case OperatorNode::OrAssn:
405	// the rewrite rules for these expressions specify that the first argument has its address taken
406	assert( ! args.empty() );
407	args.front() = new AddressExpr( args.front() );
408	break;
409	default:
410	/* do nothing */
411	;
412	}
413
414	switch ( op->get_type() ) {
415	case OperatorNode::Incr:
416	case OperatorNode::Decr:
417	case OperatorNode::IncrPost:
418	case OperatorNode::DecrPost:
419	case OperatorNode::Assign:
420	case OperatorNode::MulAssn:
421	case OperatorNode::DivAssn:
422	case OperatorNode::ModAssn:
423	case OperatorNode::PlusAssn:
424	case OperatorNode::MinusAssn:
425	case OperatorNode::LSAssn:
426	case OperatorNode::RSAssn:
427	case OperatorNode::AndAssn:
428	case OperatorNode::ERAssn:
429	case OperatorNode::OrAssn:
430	case OperatorNode::Plus:
431	case OperatorNode::Minus:
432	case OperatorNode::Mul:
433	case OperatorNode::Div:
434	case OperatorNode::Mod:
435	case OperatorNode::BitOr:
436	case OperatorNode::BitAnd:
437	case OperatorNode::Xor:
438	case OperatorNode::LShift:
439	case OperatorNode::RShift:
440	case OperatorNode::LThan:
441	case OperatorNode::GThan:
442	case OperatorNode::LEThan:
443	case OperatorNode::GEThan:
444	case OperatorNode::Eq:
445	case OperatorNode::Neq:
446	case OperatorNode::Index:
447	case OperatorNode::Range:
448	case OperatorNode::UnPlus:
449	case OperatorNode::UnMinus:
450	case OperatorNode::PointTo:
451	case OperatorNode::Neg:
452	case OperatorNode::BitNeg:
453	case OperatorNode::LabelAddress:
454	return new UntypedExpr( new NameExpr( opFuncName[ op->get_type() ] ), args );
455	case OperatorNode::AddressOf:
456	assert( args.size() == 1 );
457	assert( args.front() );
458
459	return new AddressExpr( args.front() );
460	case OperatorNode::Cast:
461	{
462	TypeValueNode * arg = dynamic_cast<TypeValueNode *>( get_args());
463	assert( arg );
464
465	DeclarationNode *decl_node = arg->get_decl();
466	ExpressionNode expr_node = dynamic_cast<ExpressionNode >( arg->get_link());
467
468	Type *targetType = decl_node->buildType();
469	if ( dynamic_cast< VoidType* >( targetType ) ) {
470	delete targetType;
471	return new CastExpr( expr_node->build(), maybeBuild< Expression >( get_argName() ) );
472	} else {
473	return new CastExpr( expr_node->build(),targetType, maybeBuild< Expression >( get_argName() ) );
474	} // if
475	}
476	case OperatorNode::FieldSel:
477	{
478	assert( args.size() == 2 );
479
480	NameExpr member = dynamic_cast<NameExpr >( args.back());
481	// TupleExpr memberTup = dynamic_cast<TupleExpr >( args.back());
482
483	if ( member != 0 ) {
484	UntypedMemberExpr *ret = new UntypedMemberExpr( member->get_name(), args.front());
485	delete member;
486	return ret;
487	/* else if ( memberTup != 0 )
488	{
489	UntypedMemberExpr *ret = new UntypedMemberExpr( memberTup->get_name(), args.front());
490	delete member;
491	return ret;
492	} */
493	} else
494	assert( false );
495	}
496	case OperatorNode::PFieldSel:
497	{
498	assert( args.size() == 2 );
499
500	NameExpr member = dynamic_cast<NameExpr >( args.back()); // modify for Tuples xxx
501	assert( member != 0 );
502
503	UntypedExpr deref = new UntypedExpr( new NameExpr( "?" ) );
504	deref->get_args().push_back( args.front() );
505
506	UntypedMemberExpr *ret = new UntypedMemberExpr( member->get_name(), deref );
507	delete member;
508	return ret;
509	}
510	case OperatorNode::AlignOf:
511	case OperatorNode::SizeOf:
512	{
513	/// bool isSizeOf = ( op->get_type() == OperatorNode::SizeOf );
514
515	if ( TypeValueNode * arg = dynamic_cast<TypeValueNode *>( get_args()) ) {
516	return new SizeofExpr( arg->get_decl()->buildType());
517	} else {
518	return new SizeofExpr( args.front());
519	} // if
520	}
521	case OperatorNode::Attr:
522	{
523	VarRefNode var = dynamic_cast<VarRefNode >( get_args());
524	assert( var );
525	if ( ! get_args()->get_link() ) {
526	return new AttrExpr( var->build(), ( Expression*)0);
527	} else if ( TypeValueNode * arg = dynamic_cast<TypeValueNode *>( get_args()->get_link()) ) {
528	return new AttrExpr( var->build(), arg->get_decl()->buildType());
529	} else {
530	return new AttrExpr( var->build(), args.back());
531	} // if
532	}
533	case OperatorNode::CompLit:
534	throw UnimplementedError( "C99 compound literals" );
535	// the short-circuited operators
536	case OperatorNode::Or:
537	case OperatorNode::And:
538	assert( args.size() == 2);
539	return new LogicalExpr( notZeroExpr( args.front() ), notZeroExpr( args.back() ), ( op->get_type() == OperatorNode::And ) );
540	case OperatorNode::Cond:
541	{
542	assert( args.size() == 3);
543	std::list< Expression* >::const_iterator i = args.begin();
544	Expression arg1 = notZeroExpr( i++ );
545	Expression arg2 = i++;
546	Expression arg3 = i++;
547	return new ConditionalExpr( arg1, arg2, arg3 );
548	}
549	case OperatorNode::NCond:
550	throw UnimplementedError( "GNU 2-argument conditional expression" );
551	case OperatorNode::Comma:
552	{
553	assert( args.size() == 2);
554	std::list< Expression* >::const_iterator i = args.begin();
555	Expression ret = i++;
556	while ( i != args.end() ) {
557	ret = new CommaExpr( ret, *i++ );
558	}
559	return ret;
560	}
561	// Tuples
562	case OperatorNode::TupleC:
563	{
564	TupleExpr *ret = new TupleExpr();
565	std::copy( args.begin(), args.end(), back_inserter( ret->get_exprs() ) );
566	return ret;
567	}
568	default:
569	// shouldn't happen
570	return 0;
571	} // switch
572	}
573
574	void CompositeExprNode::printOneLine( std::ostream &os, int indent ) const {
575	printDesignation( os );
576	os << "( ";
577	function->printOneLine( os, indent );
578	for ( ExpressionNode cur = arguments; cur != 0; cur = dynamic_cast< ExpressionNode >( cur->get_link() ) ) {
579	cur->printOneLine( os, indent );
580	}
581	os << ") ";
582	}
583
584	void CompositeExprNode::print( std::ostream &os, int indent ) const {
585	printDesignation( os );
586	os << string( indent, ' ' ) << "Application of: " << endl;
587	function->print( os, indent + ParseNode::indent_by );
588
589	os << string( indent, ' ' ) ;
590	if ( arguments ) {
591	os << "... on arguments: " << endl;
592	arguments->printList( os, indent + ParseNode::indent_by );
593	} else
594	os << "... on no arguments: " << endl;
595	}
596
597	void CompositeExprNode::set_function( ExpressionNode *f ) {
598	function = f;
599	}
600
601	void CompositeExprNode::set_args( ExpressionNode *args ) {
602	arguments = args;
603	}
604
605	ExpressionNode *CompositeExprNode::get_function( void ) const {
606	return function;
607	}
608
609	ExpressionNode *CompositeExprNode::get_args( void ) const {
610	return arguments;
611	}
612
613	void CompositeExprNode::add_arg( ExpressionNode *arg ) {
614	if ( arguments )
615	arguments->set_link( arg );
616	else
617	set_args( arg );
618	}
619
620	//##############################################################################
621
622	CommaExprNode::CommaExprNode(): CompositeExprNode( new OperatorNode( OperatorNode::Comma )) {}
623
624	CommaExprNode::CommaExprNode( ExpressionNode *exp ) : CompositeExprNode( new OperatorNode( OperatorNode::Comma ), exp ) {
625	}
626
627	CommaExprNode::CommaExprNode( ExpressionNode exp1, ExpressionNode exp2) : CompositeExprNode( new OperatorNode( OperatorNode::Comma ), exp1, exp2) {
628	}
629
630	CommaExprNode CommaExprNode::add_to_list( ExpressionNode exp ) {
631	add_arg( exp );
632
633	return this;
634	}
635
636	CommaExprNode::CommaExprNode( const CommaExprNode &other ) : CompositeExprNode( other ) {
637	}
638
639	//##############################################################################
640
641	ValofExprNode::ValofExprNode( StatementNode *s ): body( s ) {}
642
643	ValofExprNode::ValofExprNode( const ValofExprNode &other ) : ExpressionNode( other ), body( maybeClone( body ) ) {
644	}
645
646	ValofExprNode::~ValofExprNode() {
647	delete body;
648	}
649
650	void ValofExprNode::print( std::ostream &os, int indent ) const {
651	printDesignation( os );
652	os << string( indent, ' ' ) << "Valof Expression:" << std::endl;
653	get_body()->print( os, indent + 4);
654	}
655
656	void ValofExprNode::printOneLine( std::ostream &, int indent ) const {
657	assert( false );
658	}
659
660	Expression *ValofExprNode::build() const {
661	return new UntypedValofExpr ( get_body()->build(), maybeBuild< Expression >( get_argName() ) );
662	}
663
664	//##############################################################################
665
666	ForCtlExprNode::ForCtlExprNode( ParseNode init_, ExpressionNode cond, ExpressionNode *incr ) throw ( SemanticError ) : condition( cond ), change( incr ) {
667	if ( init_ == 0 )
668	init = 0;
669	else {
670	DeclarationNode *decl;
671	ExpressionNode *exp;
672
673	if (( decl = dynamic_cast<DeclarationNode *>(init_) ) != 0)
674	init = new StatementNode( decl );
675	else if (( exp = dynamic_cast<ExpressionNode *>( init_)) != 0)
676	init = new StatementNode( StatementNode::Exp, exp );
677	else
678	throw SemanticError("Error in for control expression");
679	}
680	}
681
682	ForCtlExprNode::ForCtlExprNode( const ForCtlExprNode &other )
683	: ExpressionNode( other ), init( maybeClone( other.init ) ), condition( maybeClone( other.condition ) ), change( maybeClone( other.change ) ) {
684	}
685
686	ForCtlExprNode::~ForCtlExprNode() {
687	delete init;
688	delete condition;
689	delete change;
690	}
691
692	Expression *ForCtlExprNode::build() const {
693	// this shouldn't be used!
694	assert( false );
695	return 0;
696	}
697
698	void ForCtlExprNode::print( std::ostream &os, int indent ) const{
699	os << string( indent,' ' ) << "For Control Expression -- :" << endl;
700
701	os << string( indent + 2, ' ' ) << "initialization:" << endl;
702	if ( init != 0 )
703	init->printList( os, indent + 4 );
704
705	os << string( indent + 2, ' ' ) << "condition: " << endl;
706	if ( condition != 0 )
707	condition->print( os, indent + 4 );
708	os << string( indent + 2, ' ' ) << "increment: " << endl;
709	if ( change != 0 )
710	change->print( os, indent + 4 );
711	}
712
713	void ForCtlExprNode::printOneLine( std::ostream &, int indent ) const {
714	assert( false );
715	}
716
717	//##############################################################################
718
719	TypeValueNode::TypeValueNode( DeclarationNode *decl ) : decl( decl ) {
720	}
721
722	TypeValueNode::TypeValueNode( const TypeValueNode &other ) : ExpressionNode( other ), decl( maybeClone( other.decl ) ) {
723	}
724
725	Expression *TypeValueNode::build() const {
726	return new TypeExpr( decl->buildType() );
727	}
728
729	void TypeValueNode::print( std::ostream &os, int indent ) const {
730	os << std::string( indent, ' ' ) << "Type:";
731	get_decl()->print( os, indent + 2);
732	}
733
734	void TypeValueNode::printOneLine( std::ostream &os, int indent ) const {
735	os << "Type:";
736	get_decl()->print( os, indent + 2);
737	}
738
739	ExpressionNode flattenCommas( ExpressionNode list ) {
740	if ( CompositeExprNode composite = dynamic_cast< CompositeExprNode >( list ) ) {
741	OperatorNode *op;
742	if ( ( op = dynamic_cast< OperatorNode * >( composite->get_function() )) && ( op->get_type() == OperatorNode::Comma ) ) {
743	if ( ExpressionNode next = dynamic_cast< ExpressionNode >( list->get_link() ) )
744	composite->add_arg( next );
745	return flattenCommas( composite->get_args() );
746	} // if
747	} // if
748
749	if ( ExpressionNode next = dynamic_cast< ExpressionNode >( list->get_link() ) )
750	list->set_next( flattenCommas( next ) );
751
752	return list;
753	}
754
755	ExpressionNode tupleContents( ExpressionNode tuple ) {
756	if ( CompositeExprNode composite = dynamic_cast< CompositeExprNode >( tuple ) ) {
757	OperatorNode *op = 0;
758	if ( ( op = dynamic_cast< OperatorNode * >( composite->get_function() )) && ( op->get_type() == OperatorNode::TupleC ) )
759	return composite->get_args();
760	} // if
761	return tuple;
762	}
763
764	// Local Variables: //
765	// tab-width: 4 //
766	// mode: c++ //
767	// compile-command: "make install" //
768	// End: //

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