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//===--- ClangClassTemplateNamePrinter.cpp --------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2023 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
#include "ClangClassTemplateNamePrinter.h"
#include "ImporterImpl.h"
#include "clang/AST/TypeVisitor.h"
using namespace swift;
using namespace swift::importer;
struct TemplateInstantiationNamePrinter
: clang::TypeVisitor<TemplateInstantiationNamePrinter, std::string> {
ASTContext &swiftCtx;
NameImporter *nameImporter;
ImportNameVersion version;
TemplateInstantiationNamePrinter(ASTContext &swiftCtx,
NameImporter *nameImporter,
ImportNameVersion version)
: swiftCtx(swiftCtx), nameImporter(nameImporter), version(version) {}
std::string VisitType(const clang::Type *type) {
// Print "_" as a fallback if we couldn't emit a more meaningful type name.
return "_";
}
std::string VisitBuiltinType(const clang::BuiltinType *type) {
Type swiftType = nullptr;
switch (type->getKind()) {
case clang::BuiltinType::Void:
swiftType =
swiftCtx.getNamedSwiftType(swiftCtx.getStdlibModule(), "Void");
break;
#define MAP_BUILTIN_TYPE(CLANG_BUILTIN_KIND, SWIFT_TYPE_NAME) \
case clang::BuiltinType::CLANG_BUILTIN_KIND: \
swiftType = swiftCtx.getNamedSwiftType(swiftCtx.getStdlibModule(), \
#SWIFT_TYPE_NAME); \
break;
#define MAP_BUILTIN_CCHAR_TYPE(CLANG_BUILTIN_KIND, SWIFT_TYPE_NAME) \
case clang::BuiltinType::CLANG_BUILTIN_KIND: \
swiftType = swiftCtx.getNamedSwiftType(swiftCtx.getStdlibModule(), \
#SWIFT_TYPE_NAME); \
break;
#include "swift/ClangImporter/BuiltinMappedTypes.def"
default:
break;
}
if (swiftType) {
if (swiftType->is<NominalType>() || swiftType->isVoid()) {
return swiftType->getStringAsComponent();
}
}
return "_";
}
std::string VisitRecordType(const clang::RecordType *type) {
auto tagDecl = type->getAsTagDecl();
if (auto namedArg = dyn_cast_or_null<clang::NamedDecl>(tagDecl)) {
llvm::SmallString<128> storage;
llvm::raw_svector_ostream buffer(storage);
nameImporter->importName(namedArg, version, clang::DeclarationName())
.getDeclName()
.print(buffer);
return buffer.str().str();
}
return "_";
}
std::string VisitPointerType(const clang::PointerType *type) {
std::string pointeeResult = Visit(type->getPointeeType().getTypePtr());
enum class TagTypeDecorator { None, UnsafePointer, UnsafeMutablePointer };
// If this is a pointer to foreign reference type, we should not wrap
// it in Unsafe(Mutable)?Pointer, since it will be imported as a class
// in Swift.
bool isReferenceType = false;
if (auto tagDecl = type->getPointeeType()->getAsTagDecl()) {
if (auto *rd = dyn_cast<clang::RecordDecl>(tagDecl))
isReferenceType =
ClangImporter::Implementation::recordHasReferenceSemantics(
rd, swiftCtx);
}
TagTypeDecorator decorator;
if (!isReferenceType)
decorator = type->getPointeeType().isConstQualified()
? TagTypeDecorator::UnsafePointer
: TagTypeDecorator::UnsafeMutablePointer;
else
decorator = TagTypeDecorator::None;
llvm::SmallString<128> storage;
llvm::raw_svector_ostream buffer(storage);
if (decorator != TagTypeDecorator::None)
buffer << (decorator == TagTypeDecorator::UnsafePointer
? "UnsafePointer"
: "UnsafeMutablePointer")
<< '<';
buffer << pointeeResult;
if (decorator != TagTypeDecorator::None)
buffer << '>';
return buffer.str().str();
}
std::string VisitFunctionProtoType(const clang::FunctionProtoType *type) {
llvm::SmallString<128> storage;
llvm::raw_svector_ostream buffer(storage);
buffer << "((";
llvm::interleaveComma(type->getParamTypes(), buffer,
[&](const clang::QualType ¶mType) {
buffer << Visit(paramType.getTypePtr());
});
buffer << ") -> ";
buffer << Visit(type->getReturnType().getTypePtr());
buffer << ")";
return buffer.str().str();
}
};
std::string swift::importer::printClassTemplateSpecializationName(
const clang::ClassTemplateSpecializationDecl *decl, ASTContext &swiftCtx,
NameImporter *nameImporter, ImportNameVersion version) {
TemplateInstantiationNamePrinter templateNamePrinter(swiftCtx, nameImporter,
version);
// TODO: the following logic should probably be a ConstTemplateArgumentVisitor
llvm::SmallString<128> storage;
llvm::raw_svector_ostream buffer(storage);
decl->printName(buffer);
buffer << "<";
llvm::interleaveComma(
decl->getTemplateArgs().asArray(), buffer,
[&buffer, &templateNamePrinter](const clang::TemplateArgument &arg) {
// Use import name here so builtin types such as "int" map to their
// Swift equivalent ("CInt").
if (arg.getKind() == clang::TemplateArgument::Type) {
auto ty = arg.getAsType().getTypePtr();
buffer << templateNamePrinter.Visit(ty);
return;
} else if (arg.getKind() == clang::TemplateArgument::Integral) {
buffer << "_";
if (arg.getIntegralType()->isBuiltinType()) {
buffer << templateNamePrinter.Visit(
arg.getIntegralType().getTypePtr())
<< "_";
}
arg.getAsIntegral().print(buffer, true);
return;
}
buffer << "_";
});
buffer << ">";
return buffer.str().str();
}
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