source: src/ResolvExpr/PtrsCastable.cc@ 148f7290

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 148f7290 was 89e6ffc, checked in by Aaron Moss <a3moss@…>, 9 years ago

Added support for ZeroType and OneType to all relevant visitors
  • Property mode set to 100644
File size: 4.6 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// PtrsCastable.cc --
8//
9// Author : Richard C. Bilson
10// Created On : Sun May 17 11:48:00 2015
11// Last Modified By : Peter A. Buhr
12// Last Modified On : Wed Mar 2 17:36:18 2016
13// Update Count : 8
14//
15
16#include "typeops.h"
17#include "SynTree/Type.h"
18#include "SynTree/Declaration.h"
19#include "SynTree/Visitor.h"
20#include "SymTab/Indexer.h"
21
22
23namespace ResolvExpr {
24 class PtrsCastable : public Visitor {
25 public:
26 PtrsCastable( Type *dest, const TypeEnvironment &env, const SymTab::Indexer &indexer );
27
28 int get_result() const { return result; }
29
30 virtual void visit(VoidType *voidType);
31 virtual void visit(BasicType *basicType);
32 virtual void visit(PointerType *pointerType);
33 virtual void visit(ArrayType *arrayType);
34 virtual void visit(FunctionType *functionType);
35 virtual void visit(StructInstType *inst);
36 virtual void visit(UnionInstType *inst);
37 virtual void visit(EnumInstType *inst);
38 virtual void visit(TraitInstType *inst);
39 virtual void visit(TypeInstType *inst);
40 virtual void visit(TupleType *tupleType);
41 virtual void visit(VarArgsType *varArgsType);
42 virtual void visit(ZeroType *zeroType);
43 virtual void visit(OneType *oneType);
44 private:
45 Type *dest;
46 int result;
47 const TypeEnvironment &env;
48 const SymTab::Indexer &indexer;
49 };
50
51 int objectCast( Type *src, const TypeEnvironment &env, const SymTab::Indexer &indexer ) {
52 if ( dynamic_cast< FunctionType* >( src ) ) {
53 return -1;
54 } else if ( TypeInstType *typeInst = dynamic_cast< TypeInstType* >( src ) ) {
55 EqvClass eqvClass;
56 if ( NamedTypeDecl *ntDecl = indexer.lookupType( typeInst->get_name() ) ) {
57 if ( TypeDecl *tyDecl = dynamic_cast< TypeDecl* >( ntDecl ) ) {
58 if ( tyDecl->get_kind() == TypeDecl::Ftype ) {
59 return -1;
60 } // if
61 } //if
62 } else if ( env.lookup( typeInst->get_name(), eqvClass ) ) {
63 if ( eqvClass.kind == TypeDecl::Ftype ) {
64 return -1;
65 } // if
66 } // if
67 } //if
68 return 1;
69 }
70
71 int ptrsCastable( Type *src, Type *dest, const TypeEnvironment &env, const SymTab::Indexer &indexer ) {
72 if ( TypeInstType *destAsTypeInst = dynamic_cast< TypeInstType* >( dest ) ) {
73 EqvClass eqvClass;
74 if ( env.lookup( destAsTypeInst->get_name(), eqvClass ) ) {
75 return ptrsAssignable( src, eqvClass.type, env );
76 } // if
77 } // if
78 if ( dynamic_cast< VoidType* >( dest ) ) {
79 return objectCast( src, env, indexer );
80 } else {
81 PtrsCastable ptrs( dest, env, indexer );
82 src->accept( ptrs );
83 return ptrs.get_result();
84 } // if
85 }
86
87 PtrsCastable::PtrsCastable( Type *dest, const TypeEnvironment &env, const SymTab::Indexer &indexer )
88 : dest( dest ), result( 0 ), env( env ), indexer( indexer ) {
89 }
90
91 void PtrsCastable::visit(VoidType *voidType) {
92 result = objectCast( dest, env, indexer );
93 }
94
95 void PtrsCastable::visit(BasicType *basicType) {
96 result = objectCast( dest, env, indexer );
97 }
98
99 void PtrsCastable::visit(PointerType *pointerType) {
100 result = objectCast( dest, env, indexer );
101 }
102
103 void PtrsCastable::visit(ArrayType *arrayType) {
104 result = objectCast( dest, env, indexer );
105 }
106
107 void PtrsCastable::visit(FunctionType *functionType) {
108 result = -1;
109 }
110
111 void PtrsCastable::visit(StructInstType *inst) {
112 result = objectCast( dest, env, indexer );
113 }
114
115 void PtrsCastable::visit(UnionInstType *inst) {
116 result = objectCast( dest, env, indexer );
117 }
118
119 void PtrsCastable::visit(EnumInstType *inst) {
120 if ( dynamic_cast< EnumInstType* >( dest ) ) {
121 result = 1;
122 } else if ( BasicType *bt = dynamic_cast< BasicType* >( dest ) ) {
123 if ( bt->get_kind() == BasicType::SignedInt ) {
124 result = 0;
125 } else {
126 result = 1;
127 }
128 } else {
129 result = objectCast( dest, env, indexer );
130 }
131 }
132
133 void PtrsCastable::visit(TraitInstType *inst) {
134 // I definitely don't think we should be doing anything here
135 }
136
137 void PtrsCastable::visit(TypeInstType *inst) {
138 result = objectCast( inst, env, indexer ) > 0 && objectCast( dest, env, indexer ) > 0 ? 1 : -1;
139 }
140
141 void PtrsCastable::visit(TupleType *tupleType) {
142 result = objectCast( dest, env, indexer );
143 }
144
145 void PtrsCastable::visit(VarArgsType *varArgsType) {
146 result = objectCast( dest, env, indexer );
147 }
148
149 void PtrsCastable::visit(ZeroType *zeroType) {
150 result = objectCast( dest, env, indexer );
151 }
152
153 void PtrsCastable::visit(OneType *oneType) {
154 result = objectCast( dest, env, indexer );
155 }
156} // namespace ResolvExpr
157
158// Local Variables: //
159// tab-width: 4 //
160// mode: c++ //
161// compile-command: "make install" //
162// End: //
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