source: src/ResolvExpr/CommonType.cc@ 80d9e49

ADT aaron-thesis arm-eh ast-experimental cleanup-dtors deferred_resn demangler enum forall-pointer-decay jacob/cs343-translation jenkins-sandbox new-ast new-ast-unique-expr new-env no_list persistent-indexer pthread-emulation qualifiedEnum resolv-new with_gc
Last change on this file since 80d9e49 was 4cb935e, checked in by Thierry Delisle <tdelisle@…>, 9 years ago

0 and 1 now properly parse and resolve to zero_t and one_t respectively
  • Property mode set to 100644
File size: 21.6 KB
Line 
1//
2// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
3//
4// The contents of this file are covered under the licence agreement in the
5// file "LICENCE" distributed with Cforall.
6//
7// CommonType.cc --
8//
9// Author : Richard C. Bilson
10// Created On : Sun May 17 06:59:27 2015
11// Last Modified By : Peter A. Buhr
12// Last Modified On : Wed Mar 2 17:35:34 2016
13// Update Count : 3
14//
15
16#include "typeops.h"
17#include "SynTree/Type.h"
18#include "Unify.h"
19
20
21/// #define DEBUG
22
23namespace ResolvExpr {
24 class CommonType : public Visitor {
25 public:
26 CommonType( Type *type2, bool widenFirst, bool widenSecond, const SymTab::Indexer &indexer, TypeEnvironment &env, const OpenVarSet &openVars );
27 Type *get_result() const { return result; }
28 private:
29 virtual void visit( VoidType *voidType );
30 virtual void visit( BasicType *basicType );
31 virtual void visit( PointerType *pointerType );
32 virtual void visit( ArrayType *arrayType );
33 virtual void visit( FunctionType *functionType );
34 virtual void visit( StructInstType *aggregateUseType );
35 virtual void visit( UnionInstType *aggregateUseType );
36 virtual void visit( EnumInstType *aggregateUseType );
37 virtual void visit( TraitInstType *aggregateUseType );
38 virtual void visit( TypeInstType *aggregateUseType );
39 virtual void visit( TupleType *tupleType );
40 virtual void visit( VarArgsType *varArgsType );
41 virtual void visit( ZeroType *zeroType );
42 virtual void visit( OneType *oneType );
43
44 template< typename RefType > void handleRefType( RefType *inst, Type *other );
45
46 Type *result;
47 Type *type2; // inherited
48 bool widenFirst, widenSecond;
49 const SymTab::Indexer &indexer;
50 TypeEnvironment &env;
51 const OpenVarSet &openVars;
52 };
53
54 Type *commonType( Type *type1, Type *type2, bool widenFirst, bool widenSecond, const SymTab::Indexer &indexer, TypeEnvironment &env, const OpenVarSet &openVars ) {
55 CommonType visitor( type2, widenFirst, widenSecond, indexer, env, openVars );
56 type1->accept( visitor );
57 Type *result = visitor.get_result();
58 if ( ! result ) {
59 if ( widenSecond ) {
60 TypeInstType *inst = dynamic_cast< TypeInstType* >( type2 );
61 if ( inst ) {
62 NamedTypeDecl *nt = indexer.lookupType( inst->get_name() );
63 if ( nt ) {
64 TypeDecl *type = dynamic_cast< TypeDecl* >( nt );
65 assert( type );
66 if ( type->get_base() ) {
67 Type::Qualifiers tq1 = type1->get_qualifiers(), tq2 = type2->get_qualifiers();
68 AssertionSet have, need;
69 OpenVarSet newOpen( openVars );
70 type1->get_qualifiers() = Type::Qualifiers();
71 type->get_base()->get_qualifiers() = tq1;
72 if ( unifyExact( type1, type->get_base(), env, have, need, newOpen, indexer ) ) {
73 result = type1->clone();
74 result->get_qualifiers() = tq1 + tq2;
75 } // if
76 type1->get_qualifiers() = tq1;
77 type->get_base()->get_qualifiers() = Type::Qualifiers();
78 } // if
79 } // if
80 } // if
81 } // if
82 } // if
83#ifdef DEBUG
84 std::cout << "============= commonType" << std::endl << "type1 is ";
85 type1->print( std::cout );
86 std::cout << " type2 is ";
87 type2->print( std::cout );
88 if ( result ) {
89 std::cout << " common type is ";
90 result->print( std::cout );
91 } else {
92 std::cout << " no common type";
93 } // if
94 std::cout << std::endl;
95#endif
96 return result;
97 }
98
99 static const BasicType::Kind combinedType[ BasicType::NUMBER_OF_BASIC_TYPES ][ BasicType::NUMBER_OF_BASIC_TYPES ] =
100 {
101/* Bool Char SignedChar UnsignedChar ShortSignedInt ShortUnsignedInt SignedInt UnsignedInt LongSignedInt LongUnsignedInt LongLongSignedInt LongLongUnsignedInt Float Double LongDouble FloatComplex DoubleComplex LongDoubleComplex FloatImaginary DoubleImaginary LongDoubleImaginary */
102 /* Bool */ { BasicType::Bool, BasicType::Char, BasicType::SignedChar, BasicType::UnsignedChar, BasicType::ShortSignedInt, BasicType::ShortUnsignedInt, BasicType::SignedInt, BasicType::UnsignedInt, BasicType::LongSignedInt, BasicType::LongUnsignedInt, BasicType::LongLongSignedInt, BasicType::LongLongUnsignedInt, BasicType::Float, BasicType::Double, BasicType::LongDouble, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
103 /* Char */ { BasicType::Char, BasicType::Char, BasicType::UnsignedChar, BasicType::UnsignedChar, BasicType::ShortSignedInt, BasicType::ShortUnsignedInt, BasicType::SignedInt, BasicType::UnsignedInt, BasicType::LongSignedInt, BasicType::LongUnsignedInt, BasicType::LongLongSignedInt, BasicType::LongLongUnsignedInt, BasicType::Float, BasicType::Double, BasicType::LongDouble, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
104 /* SignedChar */ { BasicType::SignedChar, BasicType::UnsignedChar, BasicType::SignedChar, BasicType::UnsignedChar, BasicType::ShortSignedInt, BasicType::ShortUnsignedInt, BasicType::SignedInt, BasicType::UnsignedInt, BasicType::LongSignedInt, BasicType::LongUnsignedInt, BasicType::LongLongSignedInt, BasicType::LongLongUnsignedInt, BasicType::Float, BasicType::Double, BasicType::LongDouble, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
105 /* UnsignedChar */ { BasicType::UnsignedChar, BasicType::UnsignedChar, BasicType::UnsignedChar, BasicType::UnsignedChar, BasicType::ShortSignedInt, BasicType::ShortUnsignedInt, BasicType::SignedInt, BasicType::UnsignedInt, BasicType::LongSignedInt, BasicType::LongUnsignedInt, BasicType::LongLongSignedInt, BasicType::LongLongUnsignedInt, BasicType::Float, BasicType::Double, BasicType::LongDouble, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
106 /* ShortSignedInt */ { BasicType::ShortSignedInt, BasicType::ShortSignedInt, BasicType::ShortSignedInt, BasicType::ShortSignedInt, BasicType::ShortSignedInt, BasicType::ShortUnsignedInt, BasicType::SignedInt, BasicType::UnsignedInt, BasicType::LongSignedInt, BasicType::LongUnsignedInt, BasicType::LongLongSignedInt, BasicType::LongLongUnsignedInt, BasicType::Float, BasicType::Double, BasicType::LongDouble, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
107 /* ShortUnsignedInt */ { BasicType::ShortUnsignedInt, BasicType::ShortUnsignedInt, BasicType::ShortUnsignedInt, BasicType::ShortUnsignedInt, BasicType::ShortUnsignedInt, BasicType::ShortUnsignedInt, BasicType::SignedInt, BasicType::UnsignedInt, BasicType::LongSignedInt, BasicType::LongUnsignedInt, BasicType::LongLongSignedInt, BasicType::LongLongUnsignedInt, BasicType::Float, BasicType::Double, BasicType::LongDouble, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
108 /* SignedInt */ { BasicType::SignedInt, BasicType::SignedInt, BasicType::SignedInt, BasicType::SignedInt, BasicType::SignedInt, BasicType::SignedInt, BasicType::SignedInt, BasicType::UnsignedInt, BasicType::LongSignedInt, BasicType::LongUnsignedInt, BasicType::LongLongSignedInt, BasicType::LongLongUnsignedInt, BasicType::Float, BasicType::Double, BasicType::LongDouble, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
109 /* UnsignedInt */ { BasicType::UnsignedInt, BasicType::UnsignedInt, BasicType::UnsignedInt, BasicType::UnsignedInt, BasicType::UnsignedInt, BasicType::UnsignedInt, BasicType::UnsignedInt, BasicType::UnsignedInt, BasicType::LongUnsignedInt, BasicType::LongUnsignedInt, BasicType::LongLongSignedInt, BasicType::LongLongUnsignedInt, BasicType::Float, BasicType::Double, BasicType::LongDouble, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
110 /* LongSignedInt */ { BasicType::LongSignedInt, BasicType::LongSignedInt, BasicType::LongSignedInt, BasicType::LongSignedInt, BasicType::LongSignedInt, BasicType::LongSignedInt, BasicType::LongSignedInt, BasicType::LongUnsignedInt, BasicType::LongSignedInt, BasicType::LongUnsignedInt, BasicType::LongLongSignedInt, BasicType::LongLongUnsignedInt, BasicType::Float, BasicType::Double, BasicType::LongDouble, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
111 /* LongUnsignedInt */ { BasicType::LongUnsignedInt, BasicType::LongUnsignedInt, BasicType::LongUnsignedInt, BasicType::LongUnsignedInt, BasicType::LongUnsignedInt, BasicType::LongUnsignedInt, BasicType::LongUnsignedInt, BasicType::LongUnsignedInt, BasicType::LongUnsignedInt, BasicType::LongUnsignedInt, BasicType::LongLongSignedInt, BasicType::LongLongUnsignedInt, BasicType::Float, BasicType::Double, BasicType::LongDouble, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
112 /* LongLongSignedInt */ { BasicType::LongLongSignedInt, BasicType::LongLongSignedInt, BasicType::LongLongSignedInt, BasicType::LongLongSignedInt, BasicType::LongLongSignedInt, BasicType::LongLongSignedInt, BasicType::LongLongSignedInt, BasicType::LongLongSignedInt, BasicType::LongLongSignedInt, BasicType::LongLongSignedInt, BasicType::LongLongSignedInt, BasicType::LongLongUnsignedInt, BasicType::Float, BasicType::Double, BasicType::LongDouble, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
113 /* LongLongUnsignedInt */ { BasicType::LongLongUnsignedInt, BasicType::LongLongUnsignedInt, BasicType::LongLongUnsignedInt, BasicType::LongLongUnsignedInt, BasicType::LongLongUnsignedInt, BasicType::LongLongUnsignedInt, BasicType::LongLongUnsignedInt, BasicType::LongLongUnsignedInt, BasicType::LongLongUnsignedInt, BasicType::LongLongUnsignedInt, BasicType::LongLongUnsignedInt, BasicType::LongLongUnsignedInt, BasicType::Float, BasicType::Double, BasicType::LongDouble, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
114 /* Float */ { BasicType::Float, BasicType::Float, BasicType::Float, BasicType::Float, BasicType::Float, BasicType::Float, BasicType::Float, BasicType::Float, BasicType::Float, BasicType::Float, BasicType::Float, BasicType::Float, BasicType::Float, BasicType::Double, BasicType::LongDouble, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
115 /* Double */ { BasicType::Double, BasicType::Double, BasicType::Double, BasicType::Double, BasicType::Double, BasicType::Double, BasicType::Double, BasicType::Double, BasicType::Double, BasicType::Double, BasicType::Double, BasicType::Double, BasicType::Double, BasicType::Double, BasicType::LongDouble, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
116 /* LongDouble */ { BasicType::LongDouble, BasicType::LongDouble, BasicType::LongDouble, BasicType::LongDouble, BasicType::LongDouble, BasicType::LongDouble, BasicType::LongDouble, BasicType::LongDouble, BasicType::LongDouble, BasicType::LongDouble, BasicType::LongDouble, BasicType::LongDouble, BasicType::LongDouble, BasicType::LongDouble, BasicType::LongDouble, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex },
117 /* FloatComplex */ { BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
118 /* DoubleComplex */ { BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
119 /* LongDoubleComplex */ { BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex },
120 /* FloatImaginary */ { BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::FloatImaginary, BasicType::DoubleImaginary, BasicType::LongDoubleImaginary },
121 /* DoubleImaginary */ { BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::DoubleComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex, BasicType::DoubleImaginary, BasicType::DoubleImaginary, BasicType::LongDoubleImaginary },
122 /* LongDoubleImaginary */ { BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleComplex, BasicType::LongDoubleImaginary, BasicType::LongDoubleImaginary, BasicType::LongDoubleImaginary }
123 };
124
125 CommonType::CommonType( Type *type2, bool widenFirst, bool widenSecond, const SymTab::Indexer &indexer, TypeEnvironment &env, const OpenVarSet &openVars )
126 : result( 0 ), type2( type2 ), widenFirst( widenFirst ), widenSecond( widenSecond ), indexer( indexer ), env( env ), openVars( openVars ) {
127 }
128
129 void CommonType::visit( VoidType *voidType ) {
130 }
131
132 void CommonType::visit( BasicType *basicType ) {
133 if ( BasicType *otherBasic = dynamic_cast< BasicType* >( type2 ) ) {
134 BasicType::Kind newType = combinedType[ basicType->get_kind() ][ otherBasic->get_kind() ];
135 if ( ( ( newType == basicType->get_kind() && basicType->get_qualifiers() >= otherBasic->get_qualifiers() ) || widenFirst ) && ( ( newType == otherBasic->get_kind() && basicType->get_qualifiers() <= otherBasic->get_qualifiers() ) || widenSecond ) ) {
136 result = new BasicType( basicType->get_qualifiers() + otherBasic->get_qualifiers(), newType );
137 } // if
138 } else if ( dynamic_cast< EnumInstType * > ( type2 ) || dynamic_cast< ZeroType* >( type2 ) || dynamic_cast< OneType* >( type2 ) ) {
139 // use signed int in lieu of the enum/zero/one type
140 BasicType::Kind newType = combinedType[ basicType->get_kind() ][ BasicType::SignedInt ];
141 if ( ( ( newType == basicType->get_kind() && basicType->get_qualifiers() >= type2->get_qualifiers() ) || widenFirst ) && ( ( newType != basicType->get_kind() && basicType->get_qualifiers() <= type2->get_qualifiers() ) || widenSecond ) ) {
142 result = new BasicType( basicType->get_qualifiers() + type2->get_qualifiers(), newType );
143 } // if
144 } // if
145 }
146
147 void CommonType::visit( PointerType *pointerType ) {
148 if ( PointerType *otherPointer = dynamic_cast< PointerType* >( type2 ) ) {
149 if ( widenFirst && dynamic_cast< VoidType* >( otherPointer->get_base() ) && ! isFtype(pointerType->get_base(), indexer) ) {
150 result = otherPointer->clone();
151 result->get_qualifiers() += pointerType->get_qualifiers();
152 } else if ( widenSecond && dynamic_cast< VoidType* >( pointerType->get_base() ) && ! isFtype(otherPointer->get_base(), indexer) ) {
153 result = pointerType->clone();
154 result->get_qualifiers() += otherPointer->get_qualifiers();
155 } else if ( ( pointerType->get_base()->get_qualifiers() >= otherPointer->get_base()->get_qualifiers() || widenFirst )
156 && ( pointerType->get_base()->get_qualifiers() <= otherPointer->get_base()->get_qualifiers() || widenSecond ) ) {
157 Type::Qualifiers tq1 = pointerType->get_base()->get_qualifiers(), tq2 = otherPointer->get_base()->get_qualifiers();
158 pointerType->get_base()->get_qualifiers() = Type::Qualifiers();
159 otherPointer->get_base()->get_qualifiers() = Type::Qualifiers();
160 AssertionSet have, need;
161 OpenVarSet newOpen( openVars );
162 if ( unifyExact( pointerType->get_base(), otherPointer->get_base(), env, have, need, newOpen, indexer ) ) {
163 if ( tq1 < tq2 ) {
164 result = pointerType->clone();
165 } else {
166 result = otherPointer->clone();
167 } // if
168 result->get_qualifiers() = tq1 + tq2;
169 } else {
170 /// std::cout << "place for ptr-to-type" << std::endl;
171 } // if
172 pointerType->get_base()->get_qualifiers() = tq1;
173 otherPointer->get_base()->get_qualifiers() = tq2;
174 } // if
175 } else if ( widenSecond && dynamic_cast< ZeroType* >( type2 ) ) {
176 result = pointerType->clone();
177 result->get_qualifiers() += type2->get_qualifiers();
178 } // if
179 }
180
181 void CommonType::visit( ArrayType *arrayType ) {
182 }
183
184 void CommonType::visit( FunctionType *functionType ) {
185 }
186
187 template< typename RefType > void CommonType::handleRefType( RefType *inst, Type *other ) {
188 }
189
190 void CommonType::visit( StructInstType *aggregateUseType ) {
191 }
192
193 void CommonType::visit( UnionInstType *aggregateUseType ) {
194 }
195
196 void CommonType::visit( EnumInstType *enumInstType ) {
197 if ( dynamic_cast< BasicType * >( type2 ) || dynamic_cast< ZeroType* >( type2 ) || dynamic_cast< OneType* >( type2 ) ) {
198 // reuse BasicType, EnumInstType code by swapping type2 with enumInstType
199 Type * temp = type2;
200 type2 = enumInstType;
201 temp->accept( *this );
202 type2 = temp;
203 } // if
204 }
205
206 void CommonType::visit( TraitInstType *aggregateUseType ) {
207 }
208
209 void CommonType::visit( TypeInstType *inst ) {
210 if ( widenFirst ) {
211 NamedTypeDecl *nt = indexer.lookupType( inst->get_name() );
212 if ( nt ) {
213 TypeDecl *type = dynamic_cast< TypeDecl* >( nt );
214 assert( type );
215 if ( type->get_base() ) {
216 Type::Qualifiers tq1 = inst->get_qualifiers(), tq2 = type2->get_qualifiers();
217 AssertionSet have, need;
218 OpenVarSet newOpen( openVars );
219 type2->get_qualifiers() = Type::Qualifiers();
220 type->get_base()->get_qualifiers() = tq1;
221 if ( unifyExact( type->get_base(), type2, env, have, need, newOpen, indexer ) ) {
222 result = type2->clone();
223 result->get_qualifiers() = tq1 + tq2;
224 } // if
225 type2->get_qualifiers() = tq2;
226 type->get_base()->get_qualifiers() = Type::Qualifiers();
227 } // if
228 } // if
229 } // if
230 }
231
232 void CommonType::visit( TupleType *tupleType ) {
233 }
234
235 void CommonType::visit( VarArgsType *varArgsType ) {
236 }
237
238 void CommonType::visit( ZeroType *zeroType ) {
239 if ( widenFirst ) {
240 if ( dynamic_cast< BasicType* >( type2 ) || dynamic_cast< PointerType* >( type2 ) || dynamic_cast< EnumInstType* >( type2 ) ) {
241 if ( widenSecond || zeroType->get_qualifiers() <= type2->get_qualifiers() ) {
242 result = type2->clone();
243 result->get_qualifiers() += zeroType->get_qualifiers();
244 }
245 } else if ( widenSecond && dynamic_cast< OneType* >( type2 ) ) {
246 result = new BasicType( zeroType->get_qualifiers(), BasicType::SignedInt );
247 result->get_qualifiers() += type2->get_qualifiers();
248 }
249 }
250 }
251
252 void CommonType::visit( OneType *oneType ) {
253 if ( widenFirst ) {
254 if ( dynamic_cast< BasicType* >( type2 ) || dynamic_cast< EnumInstType* >( type2 ) ) {
255 if ( widenSecond || oneType->get_qualifiers() <= type2->get_qualifiers() ) {
256 result = type2->clone();
257 result->get_qualifiers() += oneType->get_qualifiers();
258 }
259 } else if ( widenSecond && dynamic_cast< ZeroType* >( type2 ) ) {
260 result = new BasicType( oneType->get_qualifiers(), BasicType::SignedInt );
261 result->get_qualifiers() += type2->get_qualifiers();
262 }
263 }
264 }
265} // namespace ResolvExpr
266
267// Local Variables: //
268// tab-width: 4 //
269// mode: c++ //
270// compile-command: "make install" //
271// End: //
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