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// slang-ast-substitutions.cpp
#include "slang-ast-builder.h"
#include <assert.h>
#include "slang-generated-ast-macro.h"
namespace Slang {
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Substitutions !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Substitutions* Substitutions::applySubstitutionsShallow(ASTBuilder* astBuilder, SubstitutionSet substSet, Substitutions* substOuter, int* ioDiff)
{
SLANG_AST_NODE_VIRTUAL_CALL(Substitutions, applySubstitutionsShallow, (astBuilder, substSet, substOuter, ioDiff))
}
bool Substitutions::equals(Substitutions* subst)
{
SLANG_AST_NODE_VIRTUAL_CALL(Substitutions, equals, (subst))
}
HashCode Substitutions::getHashCode() const
{
SLANG_AST_NODE_CONST_VIRTUAL_CALL(Substitutions, getHashCode, ())
}
Substitutions* Substitutions::_applySubstitutionsShallowOverride(ASTBuilder* astBuilder, SubstitutionSet substSet, Substitutions* substOuter, int* ioDiff)
{
SLANG_UNUSED(astBuilder);
SLANG_UNUSED(substSet);
SLANG_UNUSED(substOuter);
SLANG_UNUSED(ioDiff);
SLANG_UNEXPECTED("Substitutions::_applySubstitutionsShallowOverride not overridden");
//return Substitutions*();
}
bool Substitutions::_equalsOverride(Substitutions* subst)
{
SLANG_UNUSED(subst);
SLANG_UNEXPECTED("Substitutions::_equalsOverride not overridden");
//return false;
}
HashCode Substitutions::_getHashCodeOverride() const
{
SLANG_UNEXPECTED("Substitutions::_getHashCodeOverride not overridden");
//return HashCode(0);
}
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! GenericSubstitution !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Substitutions* GenericSubstitution::_applySubstitutionsShallowOverride(ASTBuilder* astBuilder, SubstitutionSet substSet, Substitutions* substOuter, int* ioDiff)
{
int diff = 0;
if (substOuter != outer) diff++;
List<Val*> substArgs;
for (auto a : args)
{
substArgs.add(a->substituteImpl(astBuilder, substSet, &diff));
}
if (!diff) return this;
(*ioDiff)++;
auto substSubst = astBuilder->create<GenericSubstitution>();
substSubst->genericDecl = genericDecl;
substSubst->args = substArgs;
substSubst->outer = substOuter;
return substSubst;
}
bool GenericSubstitution::_equalsOverride(Substitutions* subst)
{
// both must be NULL, or non-NULL
if (subst == nullptr)
return false;
if (this == subst)
return true;
auto genericSubst = as<GenericSubstitution>(subst);
if (!genericSubst)
return false;
if (genericDecl != genericSubst->genericDecl)
return false;
Index argCount = args.getCount();
SLANG_RELEASE_ASSERT(args.getCount() == genericSubst->args.getCount());
for (Index aa = 0; aa < argCount; ++aa)
{
if (!args[aa]->equalsVal(genericSubst->args[aa]))
return false;
}
if (!outer)
return !genericSubst->outer;
if (!outer->equals(genericSubst->outer))
return false;
return true;
}
HashCode GenericSubstitution::_getHashCodeOverride() const
{
HashCode rs = 0;
for (auto && v : args)
{
rs ^= v->getHashCode();
rs *= 16777619;
}
return rs;
}
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ThisTypeSubstitution !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Substitutions* ThisTypeSubstitution::_applySubstitutionsShallowOverride(ASTBuilder* astBuilder, SubstitutionSet substSet, Substitutions* substOuter, int* ioDiff)
{
int diff = 0;
if (substOuter != outer) diff++;
// NOTE: Must use .as because we must have a smart pointer here to keep in scope.
auto substWitness = as<SubtypeWitness>(witness->substituteImpl(astBuilder, substSet, &diff));
if (!diff) return this;
(*ioDiff)++;
auto substSubst = astBuilder->create<ThisTypeSubstitution>();
substSubst->interfaceDecl = interfaceDecl;
substSubst->witness = substWitness;
substSubst->outer = substOuter;
return substSubst;
}
bool ThisTypeSubstitution::_equalsOverride(Substitutions* subst)
{
if (!subst)
return false;
if (subst == this)
return true;
if (auto thisTypeSubst = as<ThisTypeSubstitution>(subst))
{
// For our purposes, two this-type substitutions are
// equivalent if they have the same type as `This`,
// even if the specific witness values they use
// might differ.
//
if (this->interfaceDecl != thisTypeSubst->interfaceDecl)
return false;
if (!this->witness->sub->equals(thisTypeSubst->witness->sub))
return false;
return true;
}
return false;
}
HashCode ThisTypeSubstitution::_getHashCodeOverride() const
{
return witness->getHashCode();
}
} // namespace Slang
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