source: src/ResolvExpr/CommonType.cc@ 0a84919

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 0a84919 was 6f95000, checked in by Peter A. Buhr <pabuhr@…>, 9 years ago

more cleanup for bit-field type usage and create struct forward for typedef
  • Property mode set to 100644
File size: 22.3 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 : Thu Mar 16 16:24:31 2017
13// Update Count : 7
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 void getCommonWithVoidPointer( PointerType* voidPointer, PointerType* otherPointer );
45 template< typename RefType > void handleRefType( RefType *inst, Type *other );
46
47 Type *result;
48 Type *type2; // inherited
49 bool widenFirst, widenSecond;
50 const SymTab::Indexer &indexer;
51 TypeEnvironment &env;
52 const OpenVarSet &openVars;
53 };
54
55 Type *commonType( Type *type1, Type *type2, bool widenFirst, bool widenSecond, const SymTab::Indexer &indexer, TypeEnvironment &env, const OpenVarSet &openVars ) {
56 CommonType visitor( type2, widenFirst, widenSecond, indexer, env, openVars );
57 type1->accept( visitor );
58 Type *result = visitor.get_result();
59 if ( ! result ) {
60 // this appears to be handling for opaque type declarations
61 if ( widenSecond ) {
62 if ( TypeInstType *inst = dynamic_cast< TypeInstType* >( type2 ) ) {
63 if ( NamedTypeDecl *nt = indexer.lookupType( inst->get_name() ) ) {
64 TypeDecl *type = safe_dynamic_cast< TypeDecl* >( nt );
65 if ( type->get_base() ) {
66 Type::Qualifiers tq1 = type1->get_qualifiers(), tq2 = type2->get_qualifiers();
67 AssertionSet have, need;
68 OpenVarSet newOpen( openVars );
69 type1->get_qualifiers() = Type::Qualifiers();
70 type->get_base()->get_qualifiers() = tq1;
71 if ( unifyExact( type1, type->get_base(), env, have, need, newOpen, indexer ) ) {
72 result = type1->clone();
73 result->get_qualifiers() = tq1 | tq2;
74 } // if
75 type1->get_qualifiers() = tq1;
76 type->get_base()->get_qualifiers() = Type::Qualifiers();
77 } // if
78 } // if
79 } // if
80 } // if
81 } // if
82#ifdef DEBUG
83 std::cout << "============= commonType" << std::endl << "type1 is ";
84 type1->print( std::cout );
85 std::cout << " type2 is ";
86 type2->print( std::cout );
87 if ( result ) {
88 std::cout << " common type is ";
89 result->print( std::cout );
90 } else {
91 std::cout << " no common type";
92 } // if
93 std::cout << std::endl;
94#endif
95 return result;
96 }
97
98 static const BasicType::Kind combinedType[ BasicType::NUMBER_OF_BASIC_TYPES ][ BasicType::NUMBER_OF_BASIC_TYPES ] =
99 {
100/* Bool Char SignedChar UnsignedChar ShortSignedInt ShortUnsignedInt SignedInt UnsignedInt LongSignedInt LongUnsignedInt LongLongSignedInt LongLongUnsignedInt Float Double LongDouble FloatComplex DoubleComplex LongDoubleComplex FloatImaginary DoubleImaginary LongDoubleImaginary */
101 /* 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 },
102 /* 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 },
103 /* 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 },
104 /* 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 },
105 /* 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 },
106 /* 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 },
107 /* 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 },
108 /* 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 },
109 /* 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 },
110 /* 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 },
111 /* 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 },
112 /* 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 },
113 /* 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 },
114 /* 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 },
115 /* 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 },
116 /* 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 },
117 /* 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 },
118 /* 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 },
119 /* 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 },
120 /* 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 },
121 /* 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 }
122 };
123
124 CommonType::CommonType( Type *type2, bool widenFirst, bool widenSecond, const SymTab::Indexer &indexer, TypeEnvironment &env, const OpenVarSet &openVars )
125 : result( 0 ), type2( type2 ), widenFirst( widenFirst ), widenSecond( widenSecond ), indexer( indexer ), env( env ), openVars( openVars ) {
126 }
127
128 void CommonType::visit( VoidType *voidType ) {
129 }
130
131 void CommonType::visit( BasicType *basicType ) {
132 if ( BasicType *otherBasic = dynamic_cast< BasicType* >( type2 ) ) {
133 BasicType::Kind newType = combinedType[ basicType->get_kind() ][ otherBasic->get_kind() ];
134 if ( ( ( newType == basicType->get_kind() && basicType->get_qualifiers() >= otherBasic->get_qualifiers() ) || widenFirst ) && ( ( newType == otherBasic->get_kind() && basicType->get_qualifiers() <= otherBasic->get_qualifiers() ) || widenSecond ) ) {
135 result = new BasicType( basicType->get_qualifiers() | otherBasic->get_qualifiers(), newType );
136 } // if
137 } else if ( dynamic_cast< EnumInstType * > ( type2 ) || dynamic_cast< ZeroType* >( type2 ) || dynamic_cast< OneType* >( type2 ) ) {
138 // use signed int in lieu of the enum/zero/one type
139 BasicType::Kind newType = combinedType[ basicType->get_kind() ][ BasicType::SignedInt ];
140 if ( ( ( newType == basicType->get_kind() && basicType->get_qualifiers() >= type2->get_qualifiers() ) || widenFirst ) && ( ( newType != basicType->get_kind() && basicType->get_qualifiers() <= type2->get_qualifiers() ) || widenSecond ) ) {
141 result = new BasicType( basicType->get_qualifiers() | type2->get_qualifiers(), newType );
142 } // if
143 } // if
144 }
145
146 void CommonType::getCommonWithVoidPointer( PointerType* voidPointer, PointerType* otherPointer ) {
147 if ( TypeInstType* var = dynamic_cast< TypeInstType* >( otherPointer->get_base() ) ) {
148 OpenVarSet::const_iterator entry = openVars.find( var->get_name() );
149 if ( entry != openVars.end() ) {
150 AssertionSet need, have;
151 WidenMode widen( widenFirst, widenSecond );
152 if ( entry != openVars.end() && ! bindVar(var, voidPointer->get_base(), entry->second, env, need, have, openVars, widen, indexer ) ) return;
153 }
154 }
155 result = voidPointer->clone();
156 result->get_qualifiers() |= otherPointer->get_qualifiers();
157 }
158
159 void CommonType::visit( PointerType *pointerType ) {
160 if ( PointerType *otherPointer = dynamic_cast< PointerType* >( type2 ) ) {
161 if ( widenFirst && dynamic_cast< VoidType* >( otherPointer->get_base() ) && ! isFtype(pointerType->get_base(), indexer) ) {
162 getCommonWithVoidPointer( otherPointer, pointerType );
163 } else if ( widenSecond && dynamic_cast< VoidType* >( pointerType->get_base() ) && ! isFtype(otherPointer->get_base(), indexer) ) {
164 getCommonWithVoidPointer( pointerType, otherPointer );
165 } else if ( ( pointerType->get_base()->get_qualifiers() >= otherPointer->get_base()->get_qualifiers() || widenFirst )
166 && ( pointerType->get_base()->get_qualifiers() <= otherPointer->get_base()->get_qualifiers() || widenSecond ) ) {
167 Type::Qualifiers tq1 = pointerType->get_base()->get_qualifiers(), tq2 = otherPointer->get_base()->get_qualifiers();
168 pointerType->get_base()->get_qualifiers() = Type::Qualifiers();
169 otherPointer->get_base()->get_qualifiers() = Type::Qualifiers();
170 AssertionSet have, need;
171 OpenVarSet newOpen( openVars );
172 if ( unifyExact( pointerType->get_base(), otherPointer->get_base(), env, have, need, newOpen, indexer ) ) {
173 if ( tq1 < tq2 ) {
174 result = pointerType->clone();
175 } else {
176 result = otherPointer->clone();
177 } // if
178 result->get_qualifiers() = tq1 | tq2;
179 } else {
180 /// std::cout << "place for ptr-to-type" << std::endl;
181 } // if
182 pointerType->get_base()->get_qualifiers() = tq1;
183 otherPointer->get_base()->get_qualifiers() = tq2;
184 } // if
185 } else if ( widenSecond && dynamic_cast< ZeroType* >( type2 ) ) {
186 result = pointerType->clone();
187 result->get_qualifiers() |= type2->get_qualifiers();
188 } // if
189 }
190
191 void CommonType::visit( ArrayType *arrayType ) {
192 }
193
194 void CommonType::visit( FunctionType *functionType ) {
195 }
196
197 template< typename RefType > void CommonType::handleRefType( RefType *inst, Type *other ) {
198 }
199
200 void CommonType::visit( StructInstType *aggregateUseType ) {
201 }
202
203 void CommonType::visit( UnionInstType *aggregateUseType ) {
204 }
205
206 void CommonType::visit( EnumInstType *enumInstType ) {
207 if ( dynamic_cast< BasicType * >( type2 ) || dynamic_cast< ZeroType* >( type2 ) || dynamic_cast< OneType* >( type2 ) ) {
208 // reuse BasicType, EnumInstType code by swapping type2 with enumInstType
209 Type * temp = type2;
210 type2 = enumInstType;
211 temp->accept( *this );
212 type2 = temp;
213 } // if
214 }
215
216 void CommonType::visit( TraitInstType *aggregateUseType ) {
217 }
218
219 void CommonType::visit( TypeInstType *inst ) {
220 if ( widenFirst ) {
221 NamedTypeDecl *nt = indexer.lookupType( inst->get_name() );
222 if ( nt ) {
223 TypeDecl *type = safe_dynamic_cast< TypeDecl* >( nt );
224 if ( type->get_base() ) {
225 Type::Qualifiers tq1 = inst->get_qualifiers(), tq2 = type2->get_qualifiers();
226 AssertionSet have, need;
227 OpenVarSet newOpen( openVars );
228 type2->get_qualifiers() = Type::Qualifiers();
229 type->get_base()->get_qualifiers() = tq1;
230 if ( unifyExact( type->get_base(), type2, env, have, need, newOpen, indexer ) ) {
231 result = type2->clone();
232 result->get_qualifiers() = tq1 | tq2;
233 } // if
234 type2->get_qualifiers() = tq2;
235 type->get_base()->get_qualifiers() = Type::Qualifiers();
236 } // if
237 } // if
238 } // if
239 }
240
241 void CommonType::visit( TupleType *tupleType ) {
242 }
243
244 void CommonType::visit( VarArgsType *varArgsType ) {
245 }
246
247 void CommonType::visit( ZeroType *zeroType ) {
248 if ( widenFirst ) {
249 if ( dynamic_cast< BasicType* >( type2 ) || dynamic_cast< PointerType* >( type2 ) || dynamic_cast< EnumInstType* >( type2 ) ) {
250 if ( widenSecond || zeroType->get_qualifiers() <= type2->get_qualifiers() ) {
251 result = type2->clone();
252 result->get_qualifiers() |= zeroType->get_qualifiers();
253 }
254 } else if ( widenSecond && dynamic_cast< OneType* >( type2 ) ) {
255 result = new BasicType( zeroType->get_qualifiers(), BasicType::SignedInt );
256 result->get_qualifiers() |= type2->get_qualifiers();
257 }
258 }
259 }
260
261 void CommonType::visit( OneType *oneType ) {
262 if ( widenFirst ) {
263 if ( dynamic_cast< BasicType* >( type2 ) || dynamic_cast< EnumInstType* >( type2 ) ) {
264 if ( widenSecond || oneType->get_qualifiers() <= type2->get_qualifiers() ) {
265 result = type2->clone();
266 result->get_qualifiers() |= oneType->get_qualifiers();
267 }
268 } else if ( widenSecond && dynamic_cast< ZeroType* >( type2 ) ) {
269 result = new BasicType( oneType->get_qualifiers(), BasicType::SignedInt );
270 result->get_qualifiers() |= type2->get_qualifiers();
271 }
272 }
273 }
274} // namespace ResolvExpr
275
276// Local Variables: //
277// tab-width: 4 //
278// mode: c++ //
279// compile-command: "make install" //
280// End: //
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