mirror of
https://github.com/apple/swift.git
synced 2026-06-20 15:42:51 +02:00
Egor Zhdan
5821123a0c
`template<template <typename> typename>` was tripping up the template class name printer – different instantiations of a class template were getting assigned the same name. rdar://169199221
297 lines
10 KiB
C++
297 lines
10 KiB
C++
//===--- ClangClassTemplateNamePrinter.cpp --------------------------------===//
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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) 2014 - 2023 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 "ClangClassTemplateNamePrinter.h"
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#include "ImporterImpl.h"
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#include "swift/ClangImporter/ClangImporter.h"
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#include "swift/ClangImporter/ClangImporterRequests.h"
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#include "clang/AST/TemplateArgumentVisitor.h"
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#include "clang/AST/Type.h"
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#include "clang/AST/TypeVisitor.h"
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using namespace swift;
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using namespace swift::importer;
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struct TemplateInstantiationNamePrinter
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: clang::TypeVisitor<TemplateInstantiationNamePrinter, std::string> {
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ASTContext &swiftCtx;
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NameImporter *nameImporter;
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ImportNameVersion version;
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ClangImporter::Implementation *importerImpl;
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TemplateInstantiationNamePrinter(ASTContext &swiftCtx,
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NameImporter *nameImporter,
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ImportNameVersion version,
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ClangImporter::Implementation *importerImpl)
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: swiftCtx(swiftCtx), nameImporter(nameImporter), version(version),
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importerImpl(importerImpl) {}
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std::string VisitType(const clang::Type *type) {
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// Print "_" as a fallback if we couldn't emit a more meaningful type name.
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return "_";
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}
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std::string VisitBuiltinType(const clang::BuiltinType *type) {
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switch (type->getKind()) {
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case clang::BuiltinType::Void:
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return "Void";
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case clang::BuiltinType::NullPtr:
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return "__cxxNullPtrT";
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#define MAP_BUILTIN_TYPE(CLANG_BUILTIN_KIND, SWIFT_TYPE_NAME) \
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case clang::BuiltinType::CLANG_BUILTIN_KIND: \
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return #SWIFT_TYPE_NAME;
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#include "swift/ClangImporter/BuiltinMappedTypes.def"
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default:
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break;
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}
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return VisitType(type);
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}
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void emitWithCVQualifiers(llvm::raw_svector_ostream &buffer,
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clang::QualType type) {
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if (type.isConstQualified())
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buffer << "__cxxConst<";
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if (type.isVolatileQualified())
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buffer << "__cxxVolatile<";
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buffer << Visit(type.getTypePtr());
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if (type.isVolatileQualified())
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buffer << ">";
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if (type.isConstQualified())
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buffer << ">";
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}
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void emitQualifiedName(const clang::NamedDecl *namedDecl,
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llvm::raw_svector_ostream &buffer) {
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SmallVector<DeclName, 2> qualifiedNameComponents;
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auto unqualifiedName = nameImporter->importName(namedDecl, version);
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qualifiedNameComponents.push_back(unqualifiedName.getDeclName());
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const clang::DeclContext *parentCtx =
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unqualifiedName.getEffectiveContext().getAsDeclContext();
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while (parentCtx) {
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if (auto namedParentDecl = dyn_cast<clang::NamedDecl>(parentCtx)) {
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// If this component of the fully-qualified name is a decl that is
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// imported into Swift, remember its name.
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auto componentName = nameImporter->importName(namedParentDecl, version);
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qualifiedNameComponents.push_back(componentName.getDeclName());
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parentCtx = componentName.getEffectiveContext().getAsDeclContext();
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} else {
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// If this component is not imported into Swift, skip it.
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parentCtx = parentCtx->getParent();
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}
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}
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llvm::interleave(
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llvm::reverse(qualifiedNameComponents),
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[&](const DeclName &each) { each.print(buffer); },
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[&]() { buffer << "."; });
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}
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std::string VisitTagType(const clang::TagType *type) {
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auto tagDecl = type->getAsTagDecl();
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if (auto namedArg = dyn_cast_or_null<clang::NamedDecl>(tagDecl)) {
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if (auto typeDefDecl = tagDecl->getTypedefNameForAnonDecl())
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namedArg = typeDefDecl;
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llvm::SmallString<128> storage;
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llvm::raw_svector_ostream buffer(storage);
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emitQualifiedName(namedArg, buffer);
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return buffer.str().str();
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}
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return "_";
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}
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std::string VisitReferenceType(const clang::ReferenceType *type) {
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llvm::SmallString<128> storage;
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llvm::raw_svector_ostream buffer(storage);
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if (type->isLValueReferenceType()) {
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buffer << "__cxxLRef<";
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} else {
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buffer << "__cxxRRef<";
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}
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emitWithCVQualifiers(buffer, type->getPointeeType());
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buffer << ">";
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return buffer.str().str();
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}
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std::string VisitPointerType(const clang::PointerType *type) {
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clang::QualType pointee = type->getPointeeType();
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std::string pointeeResult = Visit(pointee.getTypePtr());
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// If this is a pointer to foreign reference type, we should not wrap
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// it in Unsafe(Mutable)?Pointer, since it will be imported as a class
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// in Swift.
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bool isReferenceType = false;
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if (auto *rd = pointee->getAsRecordDecl())
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isReferenceType =
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evaluateOrDefault(swiftCtx.evaluator,
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ForeignReferenceTypeInfoRequest({rd}), {})
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.isReference();
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llvm::SmallString<128> storage;
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llvm::raw_svector_ostream buffer(storage);
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if (pointee.isVolatileQualified())
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buffer << "__cxxVolatile<";
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if (!isReferenceType) {
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buffer << (pointee.isConstQualified() ? "UnsafePointer<"
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: "UnsafeMutablePointer<");
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buffer << pointeeResult;
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buffer << '>';
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} else {
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if (pointee.isConstQualified())
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buffer << "__cxxConst<";
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buffer << pointeeResult;
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if (pointee.isConstQualified())
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buffer << ">";
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}
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if (pointee.isVolatileQualified())
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buffer << ">";
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return buffer.str().str();
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}
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std::string VisitFunctionProtoType(const clang::FunctionProtoType *type) {
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llvm::SmallString<128> storage;
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llvm::raw_svector_ostream buffer(storage);
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buffer << "((";
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llvm::interleaveComma(type->getParamTypes(), buffer,
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[&](const clang::QualType ¶mType) {
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buffer << Visit(paramType.getTypePtr());
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});
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buffer << ") -> ";
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buffer << Visit(type->getReturnType().getTypePtr());
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buffer << ")";
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return buffer.str().str();
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}
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std::string VisitVectorType(const clang::VectorType *type) {
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return (Twine("SIMD") + std::to_string(type->getNumElements()) + "<" +
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Visit(type->getElementType().getTypePtr()) + ">")
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.str();
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}
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std::string VisitArrayType(const clang::ArrayType *type) {
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llvm::SmallString<128> storage;
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llvm::raw_svector_ostream buffer(storage);
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buffer << "[";
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emitWithCVQualifiers(buffer, type->getElementType());
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buffer << "]";
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return buffer.str().str();
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}
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std::string VisitConstantArrayType(const clang::ConstantArrayType *type) {
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llvm::SmallString<128> storage;
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llvm::raw_svector_ostream buffer(storage);
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buffer << "Vector<";
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emitWithCVQualifiers(buffer, type->getElementType());
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buffer << ", ";
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buffer << type->getSExtSize();
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buffer << ">";
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return buffer.str().str();
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}
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};
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struct TemplateArgumentPrinter
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: clang::ConstTemplateArgumentVisitor<TemplateArgumentPrinter, void,
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llvm::raw_svector_ostream &> {
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TemplateInstantiationNamePrinter typePrinter;
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TemplateArgumentPrinter(ASTContext &swiftCtx, NameImporter *nameImporter,
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ImportNameVersion version,
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ClangImporter::Implementation *importerImpl)
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: typePrinter(swiftCtx, nameImporter, version, importerImpl) {}
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void VisitTemplateArgument(const clang::TemplateArgument &arg,
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llvm::raw_svector_ostream &buffer) {
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// Print "_" as a fallback if we couldn't emit a more meaningful type name.
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buffer << "_";
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}
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void VisitTypeTemplateArgument(const clang::TemplateArgument &arg,
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llvm::raw_svector_ostream &buffer) {
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auto ty = arg.getAsType();
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typePrinter.emitWithCVQualifiers(buffer, ty);
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}
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void VisitIntegralTemplateArgument(const clang::TemplateArgument &arg,
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llvm::raw_svector_ostream &buffer) {
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buffer << "_";
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if (arg.getIntegralType()->isBuiltinType()) {
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buffer << typePrinter.Visit(arg.getIntegralType().getTypePtr()) << "_";
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}
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auto value = arg.getAsIntegral();
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if (value.isNegative()) {
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value.negate();
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buffer << "Neg_";
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}
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value.print(buffer, arg.getIntegralType()->isSignedIntegerType());
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}
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void VisitPackTemplateArgument(const clang::TemplateArgument &arg,
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llvm::raw_svector_ostream &buffer) {
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VisitTemplateArgumentArray(arg.getPackAsArray(), buffer);
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}
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void VisitTemplateArgumentArray(ArrayRef<clang::TemplateArgument> args,
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llvm::raw_svector_ostream &buffer) {
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bool needsComma = false;
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for (auto &arg : args) {
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// Do not try to print empty packs.
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if (arg.getKind() == clang::TemplateArgument::ArgKind::Pack &&
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arg.getPackAsArray().empty())
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continue;
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if (needsComma)
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buffer << ", ";
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Visit(arg, buffer);
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needsComma = true;
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}
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}
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void VisitTemplateTemplateArgument(const clang::TemplateArgument &arg,
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llvm::raw_svector_ostream &buffer) {
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auto templateName = arg.getAsTemplate();
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if (auto templateDecl = templateName.getAsTemplateDecl()) {
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typePrinter.emitQualifiedName(templateDecl, buffer);
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} else {
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buffer << "_";
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}
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}
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};
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std::string swift::importer::printClassTemplateSpecializationName(
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const clang::ClassTemplateSpecializationDecl *decl, ASTContext &swiftCtx,
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NameImporter *nameImporter, ImportNameVersion version) {
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TemplateArgumentPrinter templateArgPrinter(swiftCtx, nameImporter, version,
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nameImporter->getImporterImpl());
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llvm::SmallString<128> storage;
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llvm::raw_svector_ostream buffer(storage);
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decl->printName(buffer);
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buffer << "<";
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templateArgPrinter.VisitTemplateArgumentArray(
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decl->getTemplateArgs().asArray(), buffer);
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buffer << ">";
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return buffer.str().str();
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}
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