source: src/ResolvExpr/TypeEnvironment.cc@ 7e4b44db

new-env with_gc
Last change on this file since 7e4b44db was 68f9c43, checked in by Aaron Moss <a3moss@…>, 8 years ago

First pass at delete removal
  • Property mode set to 100644
File size: 7.9 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// TypeEnvironment.cc --
8//
9// Author : Richard C. Bilson
10// Created On : Sun May 17 12:19:47 2015
11// Last Modified By : Peter A. Buhr
12// Last Modified On : Sun May 17 12:23:36 2015
13// Update Count : 3
14//
15
16#include <cassert> // for assert
17#include <algorithm> // for copy, set_intersection
18#include <iterator> // for ostream_iterator, insert_iterator
19#include <utility> // for pair
20
21#include "Common/utility.h" // for maybeClone
22#include "SynTree/Type.h" // for Type, FunctionType, Type::Fora...
23#include "SynTree/TypeSubstitution.h" // for TypeSubstitution
24#include "TypeEnvironment.h"
25
26namespace ResolvExpr {
27 void printAssertionSet( const AssertionSet &assertions, std::ostream &os, int indent ) {
28 for ( AssertionSet::const_iterator i = assertions.begin(); i != assertions.end(); ++i ) {
29 i->first->print( os, indent );
30 if ( i->second.isUsed ) {
31 os << "(used)";
32 } else {
33 os << "(not used)";
34 } // if
35 } // for
36 }
37
38 void printOpenVarSet( const OpenVarSet &openVars, std::ostream &os, int indent ) {
39 os << std::string( indent, ' ' );
40 for ( OpenVarSet::const_iterator i = openVars.begin(); i != openVars.end(); ++i ) {
41 os << i->first << "(" << i->second << ") ";
42 } // for
43 }
44
45 void EqvClass::initialize( const EqvClass &src, EqvClass &dest ) {
46 dest.vars = src.vars;
47 dest.type = maybeClone( src.type );
48 dest.allowWidening = src.allowWidening;
49 dest.data = src.data;
50 }
51
52 EqvClass::EqvClass() : type( 0 ), allowWidening( true ) {
53 }
54
55 EqvClass::EqvClass( const EqvClass &other ) {
56 initialize( other, *this );
57 }
58
59 EqvClass &EqvClass::operator=( const EqvClass &other ) {
60 if ( this == &other ) return *this;
61 initialize( other, *this );
62 return *this;
63 }
64
65 void EqvClass::print( std::ostream &os, Indenter indent ) const {
66 os << "( ";
67 std::copy( vars.begin(), vars.end(), std::ostream_iterator< std::string >( os, " " ) );
68 os << ")";
69 if ( type ) {
70 os << " -> ";
71 type->print( os, indent+1 );
72 } // if
73 if ( ! allowWidening ) {
74 os << " (no widening)";
75 } // if
76 os << std::endl;
77 }
78
79 bool TypeEnvironment::lookup( const std::string &var, EqvClass &eqvClass ) const {
80 for ( std::list< EqvClass >::const_iterator i = env.begin(); i != env.end(); ++i ) {
81 if ( i->vars.find( var ) != i->vars.end() ) {
82/// std::cout << var << " is in class ";
83/// i->print( std::cout );
84 eqvClass = *i;
85 return true;
86 }
87/// std::cout << var << " is not in class ";
88/// i->print( std::cout );
89 } // for
90 return false;
91 }
92
93 void TypeEnvironment::add( const EqvClass &eqvClass ) {
94 std::list< EqvClass >::iterator i = env.begin();
95 while ( i != env.end() ) {
96 std::list< EqvClass >::iterator next = i;
97 next++;
98 std::set< std::string > intersection;
99 std::set_intersection( i->vars.begin(), i->vars.end(), eqvClass.vars.begin(), eqvClass.vars.end(), std::inserter( intersection, intersection.begin() ) );
100 if ( ! intersection.empty() ) {
101 env.erase( i );
102 } // if
103 i = next;
104 } // while
105 env.insert( env.end(), eqvClass );
106 }
107
108 void TypeEnvironment::add( const Type::ForallList &tyDecls ) {
109 for ( Type::ForallList::const_iterator i = tyDecls.begin(); i != tyDecls.end(); ++i ) {
110 EqvClass newClass;
111 newClass.vars.insert( (*i)->get_name() );
112 newClass.data = TypeDecl::Data{ (*i) };
113 env.push_back( newClass );
114 } // for
115 }
116
117 void TypeEnvironment::add( const TypeSubstitution & sub ) {
118 EqvClass newClass;
119 for ( auto p : sub ) {
120 newClass.vars.insert( p.first );
121 newClass.type = p.second->clone();
122 newClass.allowWidening = false;
123 // Minimal assumptions. Not technically correct, but might be good enough, and
124 // is the best we can do at the moment since information is lost in the
125 // transition to TypeSubstitution
126 newClass.data = TypeDecl::Data{ TypeDecl::Dtype, false };
127 add( newClass );
128 }
129 }
130
131 void TypeEnvironment::makeSubstitution( TypeSubstitution &sub ) const {
132 for ( std::list< EqvClass >::const_iterator theClass = env.begin(); theClass != env.end(); ++theClass ) {
133 for ( std::set< std::string >::const_iterator theVar = theClass->vars.begin(); theVar != theClass->vars.end(); ++theVar ) {
134/// std::cerr << "adding " << *theVar;
135 if ( theClass->type ) {
136/// std::cerr << " bound to ";
137/// theClass->type->print( std::cerr );
138/// std::cerr << std::endl;
139 sub.add( *theVar, theClass->type );
140 } else if ( theVar != theClass->vars.begin() ) {
141 TypeInstType *newTypeInst = new TypeInstType( Type::Qualifiers(), *theClass->vars.begin(), theClass->data.kind == TypeDecl::Ftype );
142/// std::cerr << " bound to variable " << *theClass->vars.begin() << std::endl;
143 sub.add( *theVar, newTypeInst );
144 } // if
145 } // for
146 } // for
147/// std::cerr << "input env is:" << std::endl;
148/// print( std::cerr, 8 );
149/// std::cerr << "sub is:" << std::endl;
150/// sub.print( std::cerr, 8 );
151 sub.normalize();
152 }
153
154 void TypeEnvironment::print( std::ostream &os, Indenter indent ) const {
155 for ( std::list< EqvClass >::const_iterator i = env.begin(); i != env.end(); ++i ) {
156 i->print( os, indent );
157 } // for
158 }
159
160 std::list< EqvClass >::iterator TypeEnvironment::internal_lookup( const std::string &var ) {
161 for ( std::list< EqvClass >::iterator i = env.begin(); i != env.end(); ++i ) {
162 if ( i->vars.find( var ) == i->vars.end() ) {
163 return i;
164 } // if
165 } // for
166 return env.end();
167 }
168
169 void TypeEnvironment::simpleCombine( const TypeEnvironment &second ) {
170 env.insert( env.end(), second.env.begin(), second.env.end() );
171 }
172
173 void TypeEnvironment::combine( const TypeEnvironment &second, Type *(*combineFunc)( Type*, Type* ) ) {
174 TypeEnvironment secondCopy( second );
175 for ( std::list< EqvClass >::iterator firstClass = env.begin(); firstClass != env.end(); ++firstClass ) {
176 EqvClass &newClass = *firstClass;
177 std::set< std::string > newVars;
178 for ( std::set< std::string >::const_iterator var = firstClass->vars.begin(); var != firstClass->vars.end(); ++var ) {
179 std::list< EqvClass >::iterator secondClass = secondCopy.internal_lookup( *var );
180 if ( secondClass != secondCopy.env.end() ) {
181 newVars.insert( secondClass->vars.begin(), secondClass->vars.end() );
182 if ( secondClass->type ) {
183 if ( newClass.type ) {
184 newClass.type = combineFunc( newClass.type, secondClass->type );
185 newClass.allowWidening = newClass.allowWidening && secondClass->allowWidening;
186 } else {
187 newClass.type = secondClass->type->clone();
188 newClass.allowWidening = secondClass->allowWidening;
189 } // if
190 } // if
191 secondCopy.env.erase( secondClass );
192 } // if
193 } // for
194 newClass.vars.insert( newVars.begin(), newVars.end() );
195 } // for
196 for ( std::list< EqvClass >::iterator secondClass = secondCopy.env.begin(); secondClass != secondCopy.env.end(); ++secondClass ) {
197 env.push_back( *secondClass );
198 } // for
199 }
200
201 void TypeEnvironment::extractOpenVars( OpenVarSet &openVars ) const {
202 for ( std::list< EqvClass >::const_iterator eqvClass = env.begin(); eqvClass != env.end(); ++eqvClass ) {
203 for ( std::set< std::string >::const_iterator var = eqvClass->vars.begin(); var != eqvClass->vars.end(); ++var ) {
204 openVars[ *var ] = eqvClass->data;
205 } // for
206 } // for
207 }
208
209 void TypeEnvironment::addActual( const TypeEnvironment& actualEnv, OpenVarSet& openVars ) {
210 for ( const EqvClass& c : actualEnv ) {
211 EqvClass c2 = c;
212 c2.allowWidening = false;
213 for ( const std::string& var : c2.vars ) {
214 openVars[ var ] = c2.data;
215 }
216 env.push_back( std::move(c2) );
217 }
218 }
219
220 std::ostream & operator<<( std::ostream & out, const TypeEnvironment & env ) {
221 env.print( out );
222 return out;
223 }
224} // namespace ResolvExpr
225
226// Local Variables: //
227// tab-width: 4 //
228// mode: c++ //
229// compile-command: "make install" //
230// End: //
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