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//===--- PrintClangClassType.cpp - Print class types in C/C++ ---*- C++ -*-===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2022 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 "PrintClangClassType.h"
#include "ClangSyntaxPrinter.h"
#include "DeclAndTypePrinter.h"
#include "PrintClangValueType.h"
#include "swift/AST/Decl.h"
#include "swift/IRGen/Linking.h"
using namespace swift;
void ClangClassTypePrinter::printClassTypeDecl(
const ClassDecl *typeDecl, llvm::function_ref<void(void)> bodyPrinter,
DeclAndTypePrinter &declAndTypePrinter) {
auto printCxxImplClassName = ClangValueTypePrinter::printCxxImplClassName;
ClangSyntaxPrinter printer(os);
auto typeMetadataFunc = irgen::LinkEntity::forTypeMetadataAccessFunction(
typeDecl->getDeclaredType()->getCanonicalType());
std::string typeMetadataFuncName = typeMetadataFunc.mangleAsString();
// Print out a forward declaration of the "hidden" _impl class.
printer.printNamespace(cxx_synthesis::getCxxImplNamespaceName(),
[&](raw_ostream &os) {
os << "class";
declAndTypePrinter.printAvailability(os, typeDecl);
os << ' ';
printCxxImplClassName(os, typeDecl);
os << ";\n";
// Print out special functions, like functions that
// access type metadata.
printer.printCTypeMetadataTypeFunction(
typeDecl, typeMetadataFuncName, {});
});
std::string baseClassName;
std::string baseClassQualifiedName;
if (auto *parentClass = typeDecl->getSuperclassDecl()) {
llvm::raw_string_ostream baseNameOS(baseClassName);
ClangSyntaxPrinter(baseNameOS).printBaseName(parentClass);
llvm::raw_string_ostream baseQualNameOS(baseClassQualifiedName);
ClangSyntaxPrinter(baseQualNameOS)
.printModuleNamespaceQualifiersIfNeeded(parentClass->getModuleContext(),
typeDecl->getModuleContext());
baseQualNameOS << baseNameOS.str();
} else {
baseClassName = "RefCountedClass";
baseClassQualifiedName = "swift::_impl::RefCountedClass";
}
os << "class";
declAndTypePrinter.printAvailability(os, typeDecl);
ClangSyntaxPrinter(os).printSymbolUSRAttribute(typeDecl);
os << ' ';
printer.printBaseName(typeDecl);
if (typeDecl->isFinal())
os << " final";
os << " : public " << baseClassQualifiedName;
os << " {\n";
os << "public:\n";
os << " using " << baseClassName << "::" << baseClassName << ";\n";
os << " using " << baseClassName << "::operator=;\n";
bodyPrinter();
os << "protected:\n";
os << " ";
printer.printInlineForThunk();
printer.printBaseName(typeDecl);
os << "(void * _Nonnull ptr) noexcept : " << baseClassName << "(ptr) {}\n";
os << "private:\n";
os << " friend class " << cxx_synthesis::getCxxImplNamespaceName() << "::";
printCxxImplClassName(os, typeDecl);
os << ";\n";
printer.printSwiftMangledNameForDebugger(typeDecl);
os << "};\n\n";
// Print out the "hidden" _impl class.
printer.printNamespace(
cxx_synthesis::getCxxImplNamespaceName(), [&](raw_ostream &os) {
os << "class";
declAndTypePrinter.printAvailability(os, typeDecl);
os << ' ';
printCxxImplClassName(os, typeDecl);
os << " {\n";
os << "public:\n";
os << "static ";
printer.printInlineForThunk();
printer.printBaseName(typeDecl);
os << " makeRetained(void * _Nonnull ptr) noexcept { return ";
printer.printBaseName(typeDecl);
os << "(ptr); }\n";
os << "};\n";
});
ClangValueTypePrinter::printTypeGenericTraits(
os, typeDecl, typeMetadataFuncName, /*genericRequirements=*/{},
typeDecl->getModuleContext(), declAndTypePrinter);
}
void ClangClassTypePrinter::printClassTypeReturnScaffold(
raw_ostream &os, const ClassDecl *type, const ModuleDecl *moduleContext,
llvm::function_ref<void(void)> bodyPrinter) {
os << " return ";
ClangSyntaxPrinter(os).printModuleNamespaceQualifiersIfNeeded(
type->getModuleContext(), moduleContext);
os << cxx_synthesis::getCxxImplNamespaceName() << "::";
ClangValueTypePrinter::printCxxImplClassName(os, type);
os << "::makeRetained(";
bodyPrinter();
os << ");\n";
}
void ClangClassTypePrinter::printParameterCxxtoCUseScaffold(
raw_ostream &os, const ClassDecl *type, const ModuleDecl *moduleContext,
llvm::function_ref<void(void)> bodyPrinter, bool isInOut) {
if (isInOut)
os << '&';
os << "::swift::" << cxx_synthesis::getCxxImplNamespaceName()
<< "::_impl_RefCountedClass"
<< "::getOpaquePointer";
if (isInOut)
os << "Ref";
os << '(';
bodyPrinter();
os << ')';
}
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