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cd752cca22
This source location will be used to determine whether to add a name lookup option to exclude macro expansions when the name lookup request is constructed. Currently, the source location argument is unused.
69 lines
2.3 KiB
C++
69 lines
2.3 KiB
C++
//===--- NameLookup.cpp - Name lookup utilities ---------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2021 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#include "NameLookup.h"
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#include "swift/AST/Decl.h"
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#include "swift/AST/GenericEnvironment.h"
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#include "swift/AST/Module.h"
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#include "swift/AST/Types.h"
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#include "llvm/ADT/SmallVector.h"
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#include <algorithm>
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using namespace swift;
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using namespace rewriting;
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void
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swift::rewriting::lookupConcreteNestedType(
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Type baseType,
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Identifier name,
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SmallVectorImpl<TypeDecl *> &concreteDecls) {
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if (auto *decl = baseType->getAnyNominal())
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lookupConcreteNestedType(decl, name, concreteDecls);
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else if (auto *archetype = baseType->getAs<OpaqueTypeArchetypeType>()) {
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// If our concrete type is an opaque result archetype, look into its
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// generic environment recursively.
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auto *genericEnv = archetype->getGenericEnvironment();
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auto genericSig = genericEnv->getGenericSignature();
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auto *typeDecl =
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genericSig->lookupNestedType(archetype->getInterfaceType(), name);
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if (typeDecl != nullptr)
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concreteDecls.push_back(typeDecl);
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}
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}
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void
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swift::rewriting::lookupConcreteNestedType(
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NominalTypeDecl *decl,
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Identifier name,
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SmallVectorImpl<TypeDecl *> &concreteDecls) {
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SmallVector<ValueDecl *, 2> foundMembers;
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decl->getParentModule()->lookupQualified(
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decl, DeclNameRef(name), decl->getLoc(),
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NL_QualifiedDefault | NL_OnlyTypes | NL_ProtocolMembers,
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foundMembers);
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for (auto member : foundMembers)
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concreteDecls.push_back(cast<TypeDecl>(member));
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}
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TypeDecl *
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swift::rewriting::findBestConcreteNestedType(
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SmallVectorImpl<TypeDecl *> &concreteDecls) {
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if (concreteDecls.empty())
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return nullptr;
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return *std::min_element(concreteDecls.begin(), concreteDecls.end(),
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[](TypeDecl *type1, TypeDecl *type2) {
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return TypeDecl::compare(type1, type2) < 0;
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});
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}
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