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aa89f9185b
An Objective-C subscript setter has a type of the form (this) -> (value, index) -> () while a Swift subscript setter has a type of the form (this) -> (index) (value) -> () Introduce a Swift "thunk" with the latter signature that simply calls the underlying Objective-C method, and make sure that thunk gets type-checked and IR-generated appropriately. Swift SVN r3382
1383 lines
50 KiB
C++
1383 lines
50 KiB
C++
//===--- ImportDecl.cpp - Import Clang Declarations -----------------------===//
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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 - 2015 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 http://swift.org/LICENSE.txt for license information
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// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements support for importing Clang declarations into Swift.
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//
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//===----------------------------------------------------------------------===//
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#include "ImporterImpl.h"
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#include "swift/AST/ASTContext.h"
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#include "swift/AST/Attr.h"
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#include "swift/AST/Decl.h"
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#include "swift/AST/Expr.h"
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#include "swift/AST/Module.h"
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#include "swift/AST/NameLookup.h"
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#include "swift/AST/Pattern.h"
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#include "swift/AST/Stmt.h"
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#include "swift/AST/Types.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/DeclVisitor.h"
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#include "llvm/ADT/StringExtras.h"
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using namespace swift;
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namespace {
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/// \brief Convert Clang declarations into the corresponding Swift
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/// declarations.
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class SwiftDeclConverter
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: public clang::DeclVisitor<SwiftDeclConverter, Decl *>
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{
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ClangImporter::Implementation &Impl;
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public:
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explicit SwiftDeclConverter(ClangImporter::Implementation &impl)
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: Impl(impl) { }
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Decl *VisitDecl(clang::Decl *decl) {
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return nullptr;
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}
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Decl *VisitTranslationUnitDecl(clang::TranslationUnitDecl *decl) {
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// Note: translation units are handled specially by importDeclContext.
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return nullptr;
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}
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Decl *VisitNamespaceDecl(clang::NamespaceDecl *decl) {
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// FIXME: Implement once Swift has namespaces.
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return nullptr;
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}
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Decl *VisitUsingDirectiveDecl(clang::UsingDirectiveDecl *decl) {
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// Never imported.
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return nullptr;
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}
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Decl *VisitNamespaceAliasDecl(clang::NamespaceAliasDecl *decl) {
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// FIXME: Implement once Swift has namespaces.
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return nullptr;
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}
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Decl *VisitLabelDecl(clang::LabelDecl *decl) {
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// Labels are function-local, and therefore never imported.
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return nullptr;
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}
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Decl *VisitTypedefNameDecl(clang::TypedefNameDecl *decl){
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auto name = Impl.importName(decl->getDeclName());
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if (name.empty())
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return nullptr;
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auto dc = Impl.importDeclContext(decl->getDeclContext());
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if (!dc)
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return nullptr;
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auto type = Impl.importType(decl->getUnderlyingType());
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if (!type)
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return nullptr;
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return new (Impl.SwiftContext) TypeAliasDecl(
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Impl.importSourceLoc(decl->getLocStart()),
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name,
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Impl.importSourceLoc(decl->getLocation()),
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TypeLoc::withoutLoc(type),
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dc,
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{ });
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}
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Decl *
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VisitUnresolvedUsingTypenameDecl(clang::UnresolvedUsingTypenameDecl *decl) {
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// Note: only occurs in templates.
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return nullptr;
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}
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Decl *VisitEnumDecl(clang::EnumDecl *decl) {
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decl = decl->getDefinition();
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if (!decl)
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return nullptr;
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Identifier name;
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if (decl->getDeclName())
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name = Impl.importName(decl->getDeclName());
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else if (decl->getTypedefNameForAnonDecl())
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name =Impl.importName(decl->getTypedefNameForAnonDecl()->getDeclName());
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if (name.empty())
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return nullptr;
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auto dc = Impl.importDeclContext(decl->getDeclContext());
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if (!dc)
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return nullptr;
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// Create the oneof declaration and record it.
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auto result = new (Impl.SwiftContext)
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OneOfDecl(Impl.importSourceLoc(decl->getLocStart()),
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name,
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Impl.importSourceLoc(decl->getLocation()),
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{ }, nullptr, dc);
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Impl.ImportedDecls[decl->getCanonicalDecl()] = result;
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// Import each of the enumerators.
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SmallVector<Decl *, 4> members;
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for (auto ec = decl->enumerator_begin(), ecEnd = decl->enumerator_end();
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ec != ecEnd; ++ec) {
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auto ood = Impl.importDecl(*ec);
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if (!ood)
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continue;
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members.push_back(ood);
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}
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// FIXME: Source range isn't totally accurate because Clang lacks the
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// location of the '{'.
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result->setMembers(Impl.SwiftContext.AllocateCopy(members),
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Impl.importSourceRange(clang::SourceRange(
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decl->getLocation(),
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decl->getRBraceLoc())));
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return result;
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}
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Decl *VisitRecordDecl(clang::RecordDecl *decl) {
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// FIXME: Skip unions for now. We can't properly map them to oneofs,
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// because they aren't descriminated in any way. We could map them to
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// structs, but that would make them very, very unsafe to use.
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if (decl->isUnion())
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return nullptr;
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// FIXME: Skip Microsoft __interfaces.
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if (decl->isInterface())
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return nullptr;
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// The types of anonymous structs or unions are never imported; their
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// fields are dumped directly into the enclosing class.
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if (decl->isAnonymousStructOrUnion())
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return nullptr;
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// FIXME: Figure out how to deal with incomplete types, since that
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// notion doesn't exist in Swift.
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decl = decl->getDefinition();
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if (!decl)
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return nullptr;
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Identifier name;
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if (decl->getDeclName())
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name = Impl.importName(decl->getDeclName());
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else if (decl->getTypedefNameForAnonDecl())
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name =Impl.importName(decl->getTypedefNameForAnonDecl()->getDeclName());
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if (name.empty())
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return nullptr;
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auto dc = Impl.importDeclContext(decl->getDeclContext());
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if (!dc)
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return nullptr;
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// Create the struct declaration and record it.
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auto result = new (Impl.SwiftContext)
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StructDecl(Impl.importSourceLoc(decl->getLocStart()),
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name,
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Impl.importSourceLoc(decl->getLocation()),
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{ }, nullptr, dc);
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Impl.ImportedDecls[decl->getCanonicalDecl()] = result;
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// FIXME: Figure out what to do with base classes in C++. One possible
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// solution would be to turn them into members and add conversion
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// functions.
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// Import each of the members.
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SmallVector<Decl *, 4> members;
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for (auto m = decl->decls_begin(), mEnd = decl->decls_end();
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m != mEnd; ++m) {
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auto nd = dyn_cast<clang::NamedDecl>(*m);
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if (!nd)
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continue;
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// Skip anonymous structs or unions; they'll be dealt with via the
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// IndirectFieldDecls.
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if (auto field = dyn_cast<clang::FieldDecl>(nd))
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if (field->isAnonymousStructOrUnion())
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continue;
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auto member = Impl.importDecl(nd);
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if (!member)
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continue;
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members.push_back(member);
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}
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// FIXME: Source range isn't totally accurate because Clang lacks the
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// location of the '{'.
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result->setMembers(Impl.SwiftContext.AllocateCopy(members),
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Impl.importSourceRange(clang::SourceRange(
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decl->getLocation(),
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decl->getRBraceLoc())));
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return result;
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}
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Decl *VisitClassTemplateSpecializationDecl(
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clang::ClassTemplateSpecializationDecl *decl) {
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// FIXME: We could import specializations, but perhaps only as unnamed
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// structural types.
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return nullptr;
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}
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Decl *VisitClassTemplatePartialSpecializationDecl(
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clang::ClassTemplatePartialSpecializationDecl *decl) {
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// Note: templates are not imported.
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return nullptr;
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}
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Decl *VisitTemplateTypeParmDecl(clang::TemplateTypeParmDecl *decl) {
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// Note: templates are not imported.
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return nullptr;
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}
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Decl *VisitEnumConstantDecl(clang::EnumConstantDecl *decl) {
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auto name = Impl.importName(decl->getDeclName());
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if (name.empty())
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return nullptr;
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auto dc = Impl.importDeclContext(decl->getDeclContext());
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if (!dc)
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return nullptr;
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auto result
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= new (Impl.SwiftContext)
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OneOfElementDecl(Impl.importSourceLoc(decl->getLocation()),
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name, TypeLoc(), dc);
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// Give the oneof element the appropriate type.
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auto oneof = cast<OneOfDecl>(dc);
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auto argTy = MetaTypeType::get(oneof->getDeclaredType(),
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Impl.SwiftContext);
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result->overwriteType(FunctionType::get(argTy, oneof->getDeclaredType(),
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Impl.SwiftContext));
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return result;
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}
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Decl *
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VisitUnresolvedUsingValueDecl(clang::UnresolvedUsingValueDecl *decl) {
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// Note: templates are not imported.
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return nullptr;
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}
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Decl *VisitIndirectFieldDecl(clang::IndirectFieldDecl *decl) {
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// Check whether the context of any of the fields in the chain is a
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// union. If so, don't import this field.
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for (auto f = decl->chain_begin(), fEnd = decl->chain_end(); f != fEnd;
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++f) {
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if (auto record = dyn_cast<clang::RecordDecl>((*f)->getDeclContext())) {
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if (record->isUnion())
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return nullptr;
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}
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}
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auto name = Impl.importName(decl->getDeclName());
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if (name.empty())
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return nullptr;
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auto type = Impl.importType(decl->getType());
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if (!type)
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return nullptr;
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auto dc = Impl.importDeclContext(decl->getDeclContext());
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if (!dc)
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return nullptr;
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// Map this indirect field to a Swift variable.
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return new (Impl.SwiftContext)
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VarDecl(Impl.importSourceLoc(decl->getLocStart()),
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name, type, dc);
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}
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/// \brief Set the declaration context of each variable within the given
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/// patterns to \p dc.
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static void setVarDeclContexts(ArrayRef<Pattern *> patterns,
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DeclContext *dc) {
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for (auto pattern : patterns) {
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auto pat = pattern->getSemanticsProvidingPattern();
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if (auto named = dyn_cast<NamedPattern>(pat))
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named->getDecl()->setDeclContext(dc);
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}
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}
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Decl *VisitFunctionDecl(clang::FunctionDecl *decl) {
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auto dc = Impl.importDeclContext(decl->getDeclContext());
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if (!dc)
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return nullptr;
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// Import the function type. If we have parameters, make sure their names
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// get into the resulting function type.
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SmallVector<Pattern *, 4> argPatterns;
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SmallVector<Pattern *, 4> bodyPatterns;
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Type type;
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if (decl->param_size())
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type = Impl.importFunctionType(
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decl->getType()->getAs<clang::FunctionType>()->getResultType(),
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{ decl->param_begin(), decl->param_size() },
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decl->isVariadic(), argPatterns, bodyPatterns);
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else
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type = Impl.importType(decl->getType());
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if (!type)
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return nullptr;
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auto resultTy = type->castTo<FunctionType>()->getResult();
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auto name = Impl.importName(decl->getDeclName());
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if (name.empty())
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return nullptr;
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// FIXME: Poor location info.
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auto loc = Impl.importSourceLoc(decl->getLocStart());
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auto funcExpr = FuncExpr::create(Impl.SwiftContext, loc,
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argPatterns, bodyPatterns,
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TypeLoc::withoutLoc(resultTy),
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nullptr, dc);
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funcExpr->setType(type);
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auto nameLoc = Impl.importSourceLoc(decl->getLocation());
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auto result = new (Impl.SwiftContext) FuncDecl(SourceLoc(), loc,
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name, nameLoc,
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/*GenericParams=*/0,
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type, funcExpr,
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dc);
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setVarDeclContexts(argPatterns, funcExpr);
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setVarDeclContexts(bodyPatterns, funcExpr);
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return result;
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}
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Decl *VisitCXXMethodDecl(clang::CXXMethodDecl *decl) {
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// FIXME: Import C++ member functions as methods.
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return nullptr;
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}
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Decl *VisitFieldDecl(clang::FieldDecl *decl) {
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// Fields are imported as variables.
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auto name = Impl.importName(decl->getDeclName());
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if (name.empty())
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return nullptr;
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auto type = Impl.importType(decl->getType());
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if (!type)
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return nullptr;
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auto dc = Impl.importDeclContext(decl->getDeclContext());
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if (!dc)
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return nullptr;
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return new (Impl.SwiftContext)
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VarDecl(Impl.importSourceLoc(decl->getLocation()),
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name, type, dc);
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}
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Decl *VisitObjCIvarDecl(clang::ObjCIvarDecl *decl) {
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// FIXME: Deal with fact that a property and an ivar can have the same
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// name.
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return VisitFieldDecl(decl);
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}
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Decl *VisitObjCAtDefsFieldDecl(clang::ObjCAtDefsFieldDecl *decl) {
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// @defs is an anachronism; ignore it.
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return nullptr;
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}
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Decl *VisitVarDecl(clang::VarDecl *decl) {
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// FIXME: Swift does not have static variables in structs/classes yet.
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if (decl->getDeclContext()->isRecord())
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return nullptr;
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// Variables are imported as... variables.
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auto name = Impl.importName(decl->getDeclName());
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if (name.empty())
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return nullptr;
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auto type = Impl.importType(decl->getType());
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if (!type)
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return nullptr;
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auto dc = Impl.importDeclContext(decl->getDeclContext());
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if (!dc)
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return nullptr;
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return new (Impl.SwiftContext)
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VarDecl(Impl.importSourceLoc(decl->getLocation()),
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name, type, dc);
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}
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Decl *VisitImplicitParamDecl(clang::ImplicitParamDecl *decl) {
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// Parameters are never directly imported.
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return nullptr;
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}
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Decl *VisitParmVarDecl(clang::ParmVarDecl *decl) {
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// Parameters are never directly imported.
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return nullptr;
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}
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Decl *
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VisitNonTypeTemplateParmDecl(clang::NonTypeTemplateParmDecl *decl) {
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// Note: templates are not imported.
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return nullptr;
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}
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Decl *VisitTemplateDecl(clang::TemplateDecl *decl) {
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// Note: templates are not imported.
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return nullptr;
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}
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Decl *VisitUsingDecl(clang::UsingDecl *decl) {
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// Using declarations are not imported.
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return nullptr;
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}
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Decl *VisitUsingShadowDecl(clang::UsingShadowDecl *decl) {
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// Using shadow declarations are not imported; rather, name lookup just
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// looks through them.
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return nullptr;
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}
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Decl *VisitObjCMethodDecl(clang::ObjCMethodDecl *decl) {
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auto dc = Impl.importDeclContext(decl->getDeclContext());
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if (!dc)
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return nullptr;
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// The name of the method is the first part of the selector.
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auto name
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= Impl.importName(decl->getSelector().getIdentifierInfoForSlot(0));
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if (name.empty())
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return nullptr;
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// Figure out the type of the container.
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auto containerTy = dc->getDeclaredTypeOfContext();
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assert(containerTy && "Method in non-type context?");
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// Add the implicit 'this' parameter patterns.
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SmallVector<Pattern *, 4> argPatterns;
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SmallVector<Pattern *, 4> bodyPatterns;
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auto thisTy = containerTy;
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if (decl->isClassMethod())
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thisTy = MetaTypeType::get(thisTy, Impl.SwiftContext);
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auto thisName = Impl.SwiftContext.getIdentifier("this");
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auto thisVar = new (Impl.SwiftContext) VarDecl(SourceLoc(), thisName,
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thisTy,
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Impl.firstClangModule);
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Pattern *thisPat = new (Impl.SwiftContext) NamedPattern(thisVar);
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thisPat->setType(thisVar->getType());
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thisPat
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= new (Impl.SwiftContext) TypedPattern(thisPat,
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TypeLoc::withoutLoc(thisTy));
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thisPat->setType(thisVar->getType());
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argPatterns.push_back(thisPat);
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bodyPatterns.push_back(thisPat);
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// Import the type that this method will have.
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auto type = Impl.importFunctionType(decl->getResultType(),
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{ decl->param_begin(),
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decl->param_size() },
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decl->isVariadic(),
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argPatterns,
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bodyPatterns,
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decl->getSelector());
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if (!type)
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return nullptr;
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auto resultTy = type->castTo<FunctionType>()->getResult();
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// Add the 'this' parameter to the function type.
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type = FunctionType::get(thisTy, type, Impl.SwiftContext);
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// FIXME: Related result type? Not so important when we get constructors
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// working.
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// FIXME: Poor location info.
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auto loc = Impl.importSourceLoc(decl->getLocStart());
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auto nameLoc = Impl.importSourceLoc(decl->getLocation());
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auto funcExpr = FuncExpr::create(Impl.SwiftContext, loc,
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argPatterns, bodyPatterns,
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TypeLoc::withoutLoc(resultTy),
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nullptr, dc);
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funcExpr->setType(type);
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auto result = new (Impl.SwiftContext) FuncDecl(SourceLoc(), loc,
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name, nameLoc,
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/*GenericParams=*/0,
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type, funcExpr, dc);
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setVarDeclContexts(argPatterns, funcExpr);
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setVarDeclContexts(bodyPatterns, funcExpr);
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// Mark this as an Objective-C method.
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result->getMutableAttrs().ObjC = true;
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// Mark class methods as static.
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if (decl->isClassMethod())
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result->setStatic();
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// If this method overrides another method, mark it as such.
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// FIXME: We'll eventually have to deal with having multiple overrides
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// in Swift.
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if (decl->isOverriding()) {
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SmallVector<const clang::ObjCMethodDecl *, 2> overridden;
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decl->getOverriddenMethods(overridden);
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clang::ObjCMethodDecl *superResult = nullptr;
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clang::ObjCMethodDecl *categoryResult = nullptr;
|
|
for (auto ov : overridden) {
|
|
if (isa<clang::ObjCInterfaceDecl>(ov->getDeclContext()))
|
|
superResult = const_cast<clang::ObjCMethodDecl *>(ov);
|
|
else if (isa<clang::ObjCCategoryDecl>(ov->getDeclContext()))
|
|
categoryResult = const_cast<clang::ObjCMethodDecl *>(ov);
|
|
}
|
|
|
|
if (superResult)
|
|
result->setOverriddenDecl(
|
|
cast_or_null<FuncDecl>(Impl.importDecl(superResult)));
|
|
else if (categoryResult)
|
|
result->setOverriddenDecl(
|
|
cast_or_null<FuncDecl>(Impl.importDecl(categoryResult)));
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
private:
|
|
/// \brief Given an imported method, try to import it as some kind of
|
|
/// special declaration, e.g., a constructor or subscript.
|
|
Decl *importSpecialMethod(Decl *decl) {
|
|
// Only consider Objective-C methods...
|
|
auto objcMethod
|
|
= dyn_cast_or_null<clang::ObjCMethodDecl>(decl->getClangDecl());
|
|
if (!objcMethod)
|
|
return nullptr;
|
|
|
|
switch (objcMethod->getMethodFamily()) {
|
|
case clang::OMF_None:
|
|
// Check for one of the subscripting selectors.
|
|
if (objcMethod->isInstanceMethod() &&
|
|
(objcMethod->getSelector() == Impl.objectAtIndexedSubscript ||
|
|
objcMethod->getSelector() == Impl.setObjectAtIndexedSubscript))
|
|
return importSubscript(decl, objcMethod);
|
|
|
|
return nullptr;
|
|
|
|
case clang::OMF_alloc:
|
|
case clang::OMF_autorelease:
|
|
case clang::OMF_copy:
|
|
case clang::OMF_dealloc:
|
|
case clang::OMF_finalize:
|
|
case clang::OMF_mutableCopy:
|
|
case clang::OMF_performSelector:
|
|
case clang::OMF_release:
|
|
case clang::OMF_retain:
|
|
case clang::OMF_retainCount:
|
|
case clang::OMF_self:
|
|
// None of these methods have special consideration.
|
|
return nullptr;
|
|
|
|
case clang::OMF_init:
|
|
// An init instance method can be a constructor.
|
|
if (objcMethod->isInstanceMethod())
|
|
return importConstructor(decl, objcMethod);
|
|
return nullptr;
|
|
|
|
case clang::OMF_new:
|
|
// A new class method can be a constructor.
|
|
if (objcMethod->isClassMethod())
|
|
return importConstructor(decl, objcMethod);
|
|
return nullptr;
|
|
}
|
|
|
|
}
|
|
|
|
/// \brief Given an imported method, try to import it as a constructor.
|
|
///
|
|
/// Objective-C methods in the 'init' and 'new' family are imported as
|
|
/// constructors in Swift, enabling the 'new' syntax, e.g.,
|
|
///
|
|
/// \code
|
|
/// new NSArray(1024) // same as NSArray.alloc.initWithCapacity:1024
|
|
/// \endcode
|
|
ConstructorDecl *importConstructor(Decl *decl,
|
|
clang::ObjCMethodDecl *objcMethod) {
|
|
// Figure out the type of the container.
|
|
auto dc = decl->getDeclContext();
|
|
auto containerTy = dc->getDeclaredTypeOfContext();
|
|
assert(containerTy && "Method in non-type context?");
|
|
|
|
// Make sure that NSObject is a supertype of the container.
|
|
// FIXME: This is a hack because we don't have a suitable 'top' type for
|
|
// Objective-C classes.
|
|
auto checkTy = containerTy;
|
|
do {
|
|
auto classDecl = checkTy->getClassOrBoundGenericClass();
|
|
if (!classDecl) {
|
|
return nullptr;
|
|
}
|
|
|
|
if (classDecl->getName().str() == "NSObject")
|
|
break;
|
|
|
|
checkTy = classDecl->getBaseClass();
|
|
if (!checkTy)
|
|
return nullptr;
|
|
} while (true);
|
|
|
|
// Only methods in the 'init' and 'new' family can become constructors.
|
|
FuncDecl *alloc = nullptr;
|
|
switch (objcMethod->getMethodFamily()) {
|
|
case clang::OMF_alloc:
|
|
case clang::OMF_autorelease:
|
|
case clang::OMF_copy:
|
|
case clang::OMF_dealloc:
|
|
case clang::OMF_finalize:
|
|
case clang::OMF_mutableCopy:
|
|
case clang::OMF_None:
|
|
case clang::OMF_performSelector:
|
|
case clang::OMF_release:
|
|
case clang::OMF_retain:
|
|
case clang::OMF_retainCount:
|
|
case clang::OMF_self:
|
|
llvm_unreachable("Caller did not filter non-constructor methods");
|
|
|
|
case clang::OMF_init: {
|
|
// Make sure we have a usable 'alloc' method. Otherwise, we can't
|
|
// build this constructor anyway.
|
|
// FIXME: Can we do this for protocol methods as well? Do we want to?
|
|
auto interface = objcMethod->getClassInterface();
|
|
if (!interface)
|
|
return nullptr;
|
|
|
|
// Form the Objective-C selector for alloc.
|
|
auto &clangContext = Impl.getClangASTContext();
|
|
auto allocId = &clangContext.Idents.get("alloc");
|
|
auto allocSel = clangContext.Selectors.getNullarySelector(allocId);
|
|
|
|
// Find the 'alloc' class method.
|
|
auto allocMethod = interface->lookupClassMethod(allocSel);
|
|
if (!allocMethod)
|
|
return nullptr;
|
|
|
|
// Import the 'alloc' class method.
|
|
alloc = cast_or_null<FuncDecl>(Impl.importDecl(allocMethod));
|
|
if (!alloc)
|
|
return nullptr;
|
|
break;
|
|
}
|
|
|
|
case clang::OMF_new:
|
|
assert(objcMethod->isClassMethod() && "Caller did not filter inputs");
|
|
break;
|
|
}
|
|
|
|
// FIXME: Hack.
|
|
auto name = Impl.SwiftContext.getIdentifier("constructor");
|
|
|
|
// Add the implicit 'this' parameter patterns.
|
|
SmallVector<Pattern *, 4> argPatterns;
|
|
SmallVector<Pattern *, 4> bodyPatterns;
|
|
auto thisTy = containerTy;
|
|
auto thisMetaTy = MetaTypeType::get(containerTy, Impl.SwiftContext);
|
|
auto thisName = Impl.SwiftContext.getIdentifier("this");
|
|
auto thisMetaVar = new (Impl.SwiftContext) VarDecl(SourceLoc(), thisName,
|
|
thisMetaTy,
|
|
Impl.firstClangModule);
|
|
Pattern *thisPat = new (Impl.SwiftContext) NamedPattern(thisMetaVar);
|
|
thisPat->setType(thisMetaTy);
|
|
thisPat
|
|
= new (Impl.SwiftContext) TypedPattern(thisPat,
|
|
TypeLoc::withoutLoc(thisMetaTy));
|
|
thisPat->setType(thisMetaTy);
|
|
|
|
argPatterns.push_back(thisPat);
|
|
bodyPatterns.push_back(thisPat);
|
|
|
|
// Import the type that this method will have.
|
|
auto type = Impl.importFunctionType(objcMethod->getResultType(),
|
|
{ objcMethod->param_begin(),
|
|
objcMethod->param_size() },
|
|
objcMethod->isVariadic(),
|
|
argPatterns,
|
|
bodyPatterns,
|
|
objcMethod->getSelector(),
|
|
/*isConstructor=*/true);
|
|
assert(type && "Type has already been successfully converted?");
|
|
|
|
// A constructor returns an object of the type, not 'id'.
|
|
// This is effectively implementing related-result-type semantics.
|
|
// FIXME: Perhaps actually check whether the routine has a related result
|
|
// type?
|
|
type = FunctionType::get(type->castTo<FunctionType>()->getInput(),
|
|
thisTy, Impl.SwiftContext);
|
|
|
|
// Add the 'this' parameter to the function type.
|
|
type = FunctionType::get(thisMetaTy, type, Impl.SwiftContext);
|
|
|
|
// FIXME: Poor location info.
|
|
auto loc = Impl.importSourceLoc(objcMethod->getLocStart());
|
|
|
|
VarDecl *thisVar = new (Impl.SwiftContext) VarDecl(SourceLoc(),
|
|
thisName, thisTy, dc);
|
|
|
|
// Create the actual constructor.
|
|
// FIXME: Losing body patterns here.
|
|
auto result = new (Impl.SwiftContext) ConstructorDecl(name, loc,
|
|
argPatterns.back(),
|
|
thisVar,
|
|
/*GenericParams=*/0,
|
|
dc);
|
|
result->getMutableAttrs().AllocatesThis = true;
|
|
result->setType(type);
|
|
thisVar->setDeclContext(result);
|
|
setVarDeclContexts(argPatterns, result);
|
|
setVarDeclContexts(bodyPatterns, result);
|
|
|
|
// Create the body of the constructor, which will call the appropriate
|
|
// underlying method (and 'alloc', if needed).
|
|
// FIXME: Use the 'this' of metaclass type rather than a metatype
|
|
// expression.
|
|
Expr* initExpr = new (Impl.SwiftContext) MetatypeExpr(nullptr, loc,
|
|
thisMetaTy);
|
|
|
|
if (objcMethod->getMethodFamily() == clang::OMF_init) {
|
|
// For an 'init' method, we need to call alloc first.
|
|
Expr *allocRef
|
|
= new (Impl.SwiftContext) DeclRefExpr(alloc, loc,
|
|
alloc->getTypeOfReference());
|
|
|
|
auto allocCall = new (Impl.SwiftContext) DotSyntaxCallExpr(allocRef,
|
|
loc,
|
|
initExpr);
|
|
auto emptyTuple = new (Impl.SwiftContext) TupleExpr(loc, {}, nullptr,
|
|
loc);
|
|
initExpr = new (Impl.SwiftContext) CallExpr(allocCall, emptyTuple);
|
|
|
|
// Cast the result of the alloc call to the (metatype) 'this'.
|
|
auto toTypeRef = new (Impl.SwiftContext) MetatypeExpr(nullptr, loc,
|
|
thisMetaTy);
|
|
initExpr = new (Impl.SwiftContext) CallExpr(toTypeRef, initExpr);
|
|
}
|
|
|
|
// Form a reference to the actual method.
|
|
auto func = cast<FuncDecl>(decl);
|
|
auto funcRef
|
|
= new (Impl.SwiftContext) DeclRefExpr(func, loc,
|
|
func->getTypeOfReference());
|
|
initExpr = new (Impl.SwiftContext) DotSyntaxCallExpr(funcRef, loc,
|
|
initExpr);
|
|
|
|
// Form the call arguments.
|
|
SmallVector<Expr *, 2> callArgs;
|
|
auto tuple = dyn_cast<TuplePattern>(argPatterns[1]);
|
|
if (!tuple) {
|
|
// FIXME: We don't want this to be the case. We should always ensure
|
|
// that the body has names, even if the interface does not.
|
|
return nullptr;
|
|
}
|
|
|
|
for (auto elt : tuple->getFields()) {
|
|
auto named = dyn_cast<NamedPattern>(
|
|
elt.getPattern()->getSemanticsProvidingPattern());
|
|
if (!named) {
|
|
// FIXME: We don't want this to be the case. Can we fake up names
|
|
// in the body parameters so this doesn't happen?
|
|
return nullptr;
|
|
}
|
|
|
|
// Create a reference to this parameter.
|
|
Expr *ref = new (Impl.SwiftContext) DeclRefExpr(named->getDecl(),
|
|
loc,
|
|
named->getType());
|
|
|
|
// If the parameter is [byref], take its address.
|
|
if (named->getDecl()->getType()->is<LValueType>())
|
|
ref = new (Impl.SwiftContext) AddressOfExpr(loc, ref,
|
|
ref->getType());
|
|
|
|
callArgs.push_back(ref);
|
|
}
|
|
|
|
// Form the method call.
|
|
Expr *callArg;
|
|
|
|
if (callArgs.size() == 1) {
|
|
callArg = callArgs[0];
|
|
} else {
|
|
auto callArgsCopy = Impl.SwiftContext.AllocateCopy(callArgs);
|
|
callArg = new (Impl.SwiftContext) TupleExpr(loc, callArgsCopy,
|
|
nullptr, loc);
|
|
}
|
|
|
|
initExpr = new (Impl.SwiftContext) CallExpr(initExpr, callArg);
|
|
|
|
// Cast the result of the alloc call to the (metatype) 'this'.
|
|
auto toTypeRef = new (Impl.SwiftContext) MetatypeExpr(nullptr, loc,
|
|
thisMetaTy);
|
|
initExpr = new (Impl.SwiftContext) CallExpr(toTypeRef, initExpr);
|
|
|
|
// Form the assignment statement.
|
|
auto refThis
|
|
= new (Impl.SwiftContext) DeclRefExpr(thisVar, loc,
|
|
thisVar->getTypeOfReference());
|
|
auto assign = new (Impl.SwiftContext) AssignStmt(refThis, loc, initExpr);
|
|
|
|
// Set the body of the constructor.
|
|
result->setBody(BraceStmt::create(Impl.SwiftContext, loc,
|
|
BraceStmt::ExprStmtOrDecl(assign),
|
|
loc));
|
|
|
|
// Inform the context that we have external definitions.
|
|
Impl.firstClangModule->addExternalDefinition(result);
|
|
|
|
return result;
|
|
}
|
|
|
|
/// \brief Retrieve the single variable described in the given pattern.
|
|
///
|
|
/// This routine assumes that the pattern is something very simple
|
|
/// like (x : type) or (x).
|
|
VarDecl *getSingleVar(Pattern *pattern) {
|
|
pattern = pattern->getSemanticsProvidingPattern();
|
|
if (auto tuple = dyn_cast<TuplePattern>(pattern)) {
|
|
pattern = tuple->getFields()[0].getPattern()
|
|
->getSemanticsProvidingPattern();
|
|
}
|
|
|
|
return cast<NamedPattern>(pattern)->getDecl();
|
|
}
|
|
|
|
/// \brief Given either the getter or setter for a subscript operation,
|
|
/// create the Swift subscript declaration.
|
|
SubscriptDecl *importSubscript(Decl *decl,
|
|
clang::ObjCMethodDecl *objcMethod) {
|
|
assert(objcMethod->isInstanceMethod() && "Caller must filter");
|
|
|
|
// Make sure we have a usable 'alloc' method. Otherwise, we can't
|
|
// build this constructor anyway.
|
|
// FIXME: Can we do this for protocol methods as well? Do we want to?
|
|
auto interface = objcMethod->getClassInterface();
|
|
if (!interface)
|
|
return nullptr;
|
|
|
|
FuncDecl *getter = nullptr, *setter = nullptr;
|
|
if (objcMethod->getSelector() == Impl.objectAtIndexedSubscript) {
|
|
getter = cast<FuncDecl>(decl);
|
|
|
|
// Find the setter
|
|
if (auto objcSetter = interface->lookupInstanceMethod(
|
|
Impl.setObjectAtIndexedSubscript)) {
|
|
setter = cast_or_null<FuncDecl>(Impl.importDecl(objcSetter));
|
|
|
|
// Don't allow static setters.
|
|
if (setter && setter->isStatic())
|
|
setter = nullptr;
|
|
}
|
|
} else if (objcMethod->getSelector() == Impl.setObjectAtIndexedSubscript){
|
|
setter = cast<FuncDecl>(decl);
|
|
|
|
// Find the getter.
|
|
if (auto objcGetter = interface->lookupInstanceMethod(
|
|
Impl.objectAtIndexedSubscript)) {
|
|
getter = cast_or_null<FuncDecl>(Impl.importDecl(objcGetter));
|
|
|
|
// Don't allow static getters.
|
|
if (getter && getter->isStatic())
|
|
return nullptr;
|
|
}
|
|
|
|
// FIXME: Swift doesn't have write-only subscripting.
|
|
if (!getter)
|
|
return nullptr;
|
|
} else {
|
|
// Not a known getter or setter.
|
|
return nullptr;
|
|
}
|
|
|
|
// Check whether we've already created a subscript operation for
|
|
// this getter/setter pair.
|
|
if (Impl.Subscripts[{getter, setter}])
|
|
return nullptr;
|
|
|
|
// Compute the element type, looking through the implicit 'this'
|
|
// parameter and the normal function parameters.
|
|
auto elementTy
|
|
= getter->getType()->castTo<AnyFunctionType>()->getResult()
|
|
->castTo<AnyFunctionType>()->getResult();
|
|
auto getterTuple = dyn_cast<TuplePattern>(
|
|
getter->getBody()->getArgParamPatterns()[1]);
|
|
if (getterTuple && getterTuple->getFields().size() != 1)
|
|
return nullptr;
|
|
|
|
// Check the form of the setter.
|
|
auto &context = Impl.SwiftContext;
|
|
FuncDecl *setterThunk = nullptr;
|
|
if (setter) {
|
|
auto tuple = dyn_cast<TuplePattern>(
|
|
setter->getBody()->getBodyParamPatterns()[1]);
|
|
if (!tuple)
|
|
return nullptr;
|
|
|
|
if (tuple->getFields().size() != 2)
|
|
return nullptr;
|
|
|
|
// The setter must accept elements of the same type as the getter
|
|
// returns.
|
|
// FIXME: Adjust C++ references?
|
|
auto setterElementTy = tuple->getFields()[0].getPattern()->getType();
|
|
if (!elementTy->isEqual(setterElementTy))
|
|
return nullptr;
|
|
|
|
// Objective-C subscript setters are imported with a function type
|
|
// such as:
|
|
//
|
|
// (this) -> (value, index) -> ()
|
|
//
|
|
// while Swift subscript setters are curried as
|
|
//
|
|
// (this) -> (index)(value) -> ()
|
|
//
|
|
// Build a getter thunk with the latter signature that maps to the
|
|
// former.
|
|
auto loc = setter->getLoc();
|
|
auto indexPattern = tuple->getFields()[1].getPattern()->clone(context);
|
|
auto valuePattern = tuple->getFields()[0].getPattern()->clone(context);
|
|
Pattern *getterArgs[3] = {
|
|
// this
|
|
getter->getBody()->getBodyParamPatterns()[0]->clone(context),
|
|
// index
|
|
TuplePattern::create(context, loc, TuplePatternElt(indexPattern),
|
|
loc),
|
|
// value
|
|
TuplePattern::create(context, loc, TuplePatternElt(valuePattern),
|
|
loc),
|
|
};
|
|
|
|
getterArgs[1]->setType(
|
|
TupleType::get(TupleTypeElt(indexPattern->getType(),
|
|
indexPattern->getBoundName()),
|
|
context));
|
|
getterArgs[2]->setType(
|
|
TupleType::get(TupleTypeElt(valuePattern->getType(),
|
|
valuePattern->getBoundName()),
|
|
context));
|
|
|
|
// Form the type of the setter.
|
|
auto setterType = FunctionType::get(getterArgs[2]->getType(),
|
|
TupleType::getEmpty(context),
|
|
context);
|
|
setterType = FunctionType::get(getterArgs[1]->getType(),
|
|
setterType,
|
|
context);
|
|
setterType = FunctionType::get(getterArgs[0]->getType(),
|
|
setterType,
|
|
context);
|
|
|
|
// Create the setter body.
|
|
auto funcExpr = FuncExpr::create(context, setter->getLoc(),
|
|
getterArgs,
|
|
getterArgs,
|
|
TypeLoc::withoutLoc(
|
|
TupleType::getEmpty(context)),
|
|
nullptr,
|
|
setter->getDeclContext());
|
|
funcExpr->setType(setterType);
|
|
setVarDeclContexts(getterArgs, funcExpr);
|
|
|
|
// Create the setter thunk.
|
|
setterThunk = new (context) FuncDecl(SourceLoc(), setter->getLoc(),
|
|
Identifier(), SourceLoc(), nullptr,
|
|
setterType, funcExpr,
|
|
setter->getDeclContext());
|
|
setterThunk->setClangDecl(setter->getClangDecl());
|
|
|
|
// Create the body of the thunk, which calls the Objective-C setter.
|
|
auto thisVar = getSingleVar(getterArgs[0]);
|
|
auto indexVar = getSingleVar(getterArgs[1]);
|
|
auto valueVar = getSingleVar(getterArgs[2]);
|
|
|
|
auto thisRef = new (context) DeclRefExpr(thisVar, loc,
|
|
thisVar->getTypeOfReference());
|
|
auto indexRef
|
|
= new (context) DeclRefExpr(indexVar, loc,
|
|
indexVar->getTypeOfReference());
|
|
auto valueRef
|
|
= new (context) DeclRefExpr(valueVar, loc,
|
|
valueVar->getTypeOfReference());
|
|
auto setterRef
|
|
= new (context) DeclRefExpr(setter, loc,
|
|
setter->getTypeOfReference());
|
|
|
|
// First, bind 'this' to the method.
|
|
Expr *call = new (context) DotSyntaxCallExpr(setterRef, loc, thisRef);
|
|
|
|
// Next, call the Objective-C setter.
|
|
Expr *callArgsArray[2] = { valueRef, indexRef };
|
|
auto callArgs
|
|
= new (context) TupleExpr(loc,
|
|
context.AllocateCopy(
|
|
MutableArrayRef<Expr*>(callArgsArray)),
|
|
nullptr, loc);
|
|
call = new (context) CallExpr(call, callArgs);
|
|
|
|
// Finally, set the body.
|
|
funcExpr->setBody(BraceStmt::create(context, loc,
|
|
BraceStmt::ExprStmtOrDecl(call),
|
|
loc));
|
|
|
|
// Register this thunk as an external definition.
|
|
Impl.firstClangModule->addExternalDefinition(setterThunk);
|
|
}
|
|
|
|
// Build the subscript declaration.
|
|
auto dc = decl->getDeclContext();
|
|
auto subscript
|
|
= new (context) SubscriptDecl(
|
|
context.getIdentifier("__subscript"),
|
|
decl->getLoc(),
|
|
getter->getBody()->getArgParamPatterns()[1]
|
|
->clone(context),
|
|
decl->getLoc(),
|
|
TypeLoc::withoutLoc(elementTy),
|
|
SourceRange(), getter, setterThunk, dc);
|
|
|
|
subscript->setType(FunctionType::get(subscript->getIndices()->getType(),
|
|
subscript->getElementType(),
|
|
context));
|
|
|
|
if (setterThunk)
|
|
setterThunk->makeSetter(subscript);
|
|
|
|
// FIXME: Figure out overriding.
|
|
|
|
// Note that we've created this subscript.
|
|
Impl.Subscripts[{getter, setter}] = subscript;
|
|
return subscript;
|
|
}
|
|
|
|
public:
|
|
Decl *VisitObjCCategoryDecl(clang::ObjCCategoryDecl *decl) {
|
|
// Objective-C categories and extensions map to Swift extensions.
|
|
|
|
// Find the Swift class being extended.
|
|
auto objcClass
|
|
= cast_or_null<ClassDecl>(Impl.importDecl(decl->getClassInterface()));
|
|
if (!objcClass)
|
|
return nullptr;
|
|
|
|
auto dc = Impl.importDeclContext(decl->getDeclContext());
|
|
if (!dc)
|
|
return nullptr;
|
|
|
|
// FIXME: Import protocols, add them to 'inherited' list.
|
|
|
|
// Create the extension declaration and record it.
|
|
auto result
|
|
= new (Impl.SwiftContext)
|
|
ExtensionDecl(Impl.importSourceLoc(decl->getLocStart()),
|
|
TypeLoc::withoutLoc(objcClass->getDeclaredType()),
|
|
{ }, dc);
|
|
Impl.ImportedDecls[decl->getCanonicalDecl()] = result;
|
|
|
|
// Import each of the members.
|
|
SmallVector<Decl *, 4> members;
|
|
for (auto m = decl->decls_begin(), mEnd = decl->decls_end();
|
|
m != mEnd; ++m) {
|
|
auto nd = dyn_cast<clang::NamedDecl>(*m);
|
|
if (!nd)
|
|
continue;
|
|
|
|
auto member = Impl.importDecl(nd);
|
|
if (!member)
|
|
continue;
|
|
|
|
// If this member is a method that is a getter or setter for a property
|
|
// that was imported, don't add it to the list of members so it won't
|
|
// be found by name lookup. This eliminates the ambiguity between
|
|
// property names and getter names (by choosing to only have a
|
|
// variable).
|
|
if (auto objcMethod = dyn_cast<clang::ObjCMethodDecl>(nd)) {
|
|
if (auto property = objcMethod->findPropertyDecl())
|
|
if (Impl.importDecl(
|
|
const_cast<clang::ObjCPropertyDecl *>(property)))
|
|
continue;
|
|
|
|
// If there is a special declaration associated with this member,
|
|
// add it now.
|
|
if (auto special = importSpecialMethod(member)) {
|
|
members.push_back(special);
|
|
}
|
|
}
|
|
|
|
members.push_back(member);
|
|
}
|
|
|
|
// FIXME: Source range isn't accurate.
|
|
result->setMembers(Impl.SwiftContext.AllocateCopy(members),
|
|
Impl.importSourceRange(clang::SourceRange(
|
|
decl->getLocation(),
|
|
decl->getLocEnd())));
|
|
|
|
return result;
|
|
}
|
|
|
|
// FIXME: ObjCProtocolDecl
|
|
|
|
Decl *VisitObjCInterfaceDecl(clang::ObjCInterfaceDecl *decl) {
|
|
// FIXME: Figure out how to deal with incomplete types, since that
|
|
// notion doesn't exist in Swift.
|
|
decl = decl->getDefinition();
|
|
if (!decl)
|
|
return nullptr;
|
|
|
|
auto name = Impl.importName(decl->getDeclName());
|
|
if (name.empty())
|
|
return nullptr;
|
|
|
|
auto dc = Impl.importDeclContext(decl->getDeclContext());
|
|
if (!dc)
|
|
return nullptr;
|
|
|
|
// FIXME: Import the protocols that this class conforms to. There's
|
|
// a minor, annoying problem here because those protocols might mention
|
|
// this class before we've had a chance to build it (due to forward
|
|
// declarations). The same issue occurs with the superclass...
|
|
|
|
// Create the class declaration and record it.
|
|
auto result = new (Impl.SwiftContext)
|
|
ClassDecl(Impl.importSourceLoc(decl->getLocStart()),
|
|
name,
|
|
Impl.importSourceLoc(decl->getLocation()),
|
|
{ }, nullptr, dc);
|
|
Impl.ImportedDecls[decl->getCanonicalDecl()] = result;
|
|
|
|
// If this Objective-C class has a supertype, import it.
|
|
if (auto objcSuper = decl->getSuperClass()) {
|
|
auto super = cast_or_null<ClassDecl>(Impl.importDecl(objcSuper));
|
|
if (!super)
|
|
return nullptr;
|
|
|
|
TypeLoc superTy(super->getDeclaredType(),
|
|
Impl.importSourceRange(decl->getSuperClassLoc()));
|
|
result->setBaseClassLoc(superTy);
|
|
}
|
|
|
|
// Note that this is an Objective-C class.
|
|
result->getMutableAttrs().ObjC = true;
|
|
|
|
// Import each of the members.
|
|
SmallVector<Decl *, 4> members;
|
|
for (auto m = decl->decls_begin(), mEnd = decl->decls_end();
|
|
m != mEnd; ++m) {
|
|
auto nd = dyn_cast<clang::NamedDecl>(*m);
|
|
if (!nd)
|
|
continue;
|
|
|
|
auto member = Impl.importDecl(nd);
|
|
if (!member)
|
|
continue;
|
|
|
|
// If this member is a method that is a getter or setter for a property
|
|
// that was imported, don't add it to the list of members so it won't
|
|
// be found by name lookup. This eliminates the ambiguity between
|
|
// property names and getter names (by choosing to only have a
|
|
// variable).
|
|
if (auto objcMethod = dyn_cast<clang::ObjCMethodDecl>(nd)) {
|
|
if (auto property = objcMethod->findPropertyDecl())
|
|
if (Impl.importDecl(
|
|
const_cast<clang::ObjCPropertyDecl *>(property)))
|
|
continue;
|
|
|
|
// If there is a special declaration associated with this member,
|
|
// add it now.
|
|
if (auto special = importSpecialMethod(member)) {
|
|
members.push_back(special);
|
|
}
|
|
}
|
|
|
|
members.push_back(member);
|
|
}
|
|
|
|
// FIXME: Source range isn't accurate.
|
|
result->setMembers(Impl.SwiftContext.AllocateCopy(members),
|
|
Impl.importSourceRange(clang::SourceRange(
|
|
decl->getLocation(),
|
|
decl->getLocEnd())));
|
|
|
|
return result;
|
|
}
|
|
|
|
Decl *VisitObjCImplDecl(clang::ObjCImplDecl *decl) {
|
|
// Implementations of Objective-C classes and categories are not
|
|
// reflected into Swift.
|
|
return nullptr;
|
|
}
|
|
|
|
Decl *VisitObjCPropertyDecl(clang::ObjCPropertyDecl *decl) {
|
|
// Properties are imported as variables.
|
|
auto dc = Impl.importDeclContext(decl->getDeclContext());
|
|
if (!dc)
|
|
return nullptr;
|
|
|
|
auto name = Impl.importName(decl->getDeclName());
|
|
if (name.empty())
|
|
return nullptr;
|
|
|
|
// Check whether there is a function with the same name as this
|
|
// property. If so, suppress the property; the user will have to use
|
|
// the methods directly, to avoid ambiguities.
|
|
auto containerTy = dc->getDeclaredTypeInContext();
|
|
VarDecl *overridden = nullptr;
|
|
MemberLookup lookup(containerTy, name, *Impl.firstClangModule);
|
|
for (const auto &result : lookup.Results) {
|
|
if (isa<FuncDecl>(result.D))
|
|
return nullptr;
|
|
|
|
if (auto var = dyn_cast<VarDecl>(result.D))
|
|
overridden = var;
|
|
}
|
|
|
|
auto type = Impl.importType(decl->getType());
|
|
if (!type)
|
|
return nullptr;
|
|
|
|
// Import the getter.
|
|
auto getter
|
|
= cast_or_null<FuncDecl>(Impl.importDecl(decl->getGetterMethodDecl()));
|
|
if (!getter && decl->getGetterMethodDecl())
|
|
return nullptr;
|
|
|
|
// Import the setter, if there is one.
|
|
auto setter
|
|
= cast_or_null<FuncDecl>(Impl.importDecl(decl->getSetterMethodDecl()));
|
|
if (!setter && decl->getSetterMethodDecl())
|
|
return nullptr;
|
|
|
|
auto result = new (Impl.SwiftContext)
|
|
VarDecl(Impl.importSourceLoc(decl->getLocation()),
|
|
name, type, dc);
|
|
|
|
// Turn this into a property.
|
|
// FIXME: Fake locations for '{' and '}'?
|
|
result->setProperty(Impl.SwiftContext, SourceLoc(), getter, setter,
|
|
SourceLoc());
|
|
|
|
if (overridden) {
|
|
result->setOverriddenDecl(overridden);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
Decl *
|
|
VisitObjCCompatibleAliasDecl(clang::ObjCCompatibleAliasDecl *decl) {
|
|
// Like C++ using declarations, name lookup simply looks through
|
|
// Objective-C compatibility aliases. They are not imported directly.
|
|
return nullptr;
|
|
}
|
|
|
|
Decl *VisitLinkageSpecDecl(clang::LinkageSpecDecl *decl) {
|
|
// Linkage specifications are not imported.
|
|
return nullptr;
|
|
}
|
|
|
|
Decl *VisitObjCPropertyImplDecl(clang::ObjCPropertyImplDecl *decl) {
|
|
// @synthesize and @dynamic are not imported, since they are not part
|
|
// of the interface to a class.
|
|
return nullptr;
|
|
}
|
|
|
|
Decl *VisitFileScopeAsmDecl(clang::FileScopeAsmDecl *decl) {
|
|
return nullptr;
|
|
}
|
|
|
|
Decl *VisitAccessSpecDecl(clang::AccessSpecDecl *decl) {
|
|
return nullptr;
|
|
}
|
|
|
|
Decl *VisitFriendDecl(clang::FriendDecl *decl) {
|
|
// Friends are not imported; Swift has a different access control
|
|
// mechanism.
|
|
return nullptr;
|
|
}
|
|
|
|
Decl *VisitFriendTemplateDecl(clang::FriendTemplateDecl *decl) {
|
|
// Friends are not imported; Swift has a different access control
|
|
// mechanism.
|
|
return nullptr;
|
|
}
|
|
|
|
Decl *VisitStaticAssertDecl(clang::StaticAssertDecl *decl) {
|
|
// Static assertions are an implementation detail.
|
|
return nullptr;
|
|
}
|
|
|
|
Decl *VisitBlockDecl(clang::BlockDecl *decl) {
|
|
// Blocks are not imported (although block types can be imported).
|
|
return nullptr;
|
|
}
|
|
|
|
Decl *VisitClassScopeFunctionSpecializationDecl(
|
|
clang::ClassScopeFunctionSpecializationDecl *decl) {
|
|
// Note: templates are not imported.
|
|
return nullptr;
|
|
}
|
|
|
|
Decl *VisitImportDecl(clang::ImportDecl *decl) {
|
|
// Transitive module imports are not handled at the declaration level.
|
|
// Rather, they are understood from the module itself.
|
|
return nullptr;
|
|
}
|
|
};
|
|
}
|
|
|
|
Decl *ClangImporter::Implementation::importDecl(clang::NamedDecl *decl) {
|
|
if (!decl)
|
|
return nullptr;
|
|
|
|
auto known = ImportedDecls.find(decl->getCanonicalDecl());
|
|
if (known != ImportedDecls.end())
|
|
return known->second;
|
|
|
|
SwiftDeclConverter converter(*this);
|
|
auto result = converter.Visit(decl);
|
|
auto canon = decl->getCanonicalDecl();
|
|
if (result) {
|
|
assert(!result->getClangDecl() || result->getClangDecl() == canon);
|
|
result->setClangDecl(canon);
|
|
}
|
|
return ImportedDecls[canon] = result;
|
|
}
|
|
|
|
DeclContext *
|
|
ClangImporter::Implementation::importDeclContext(clang::DeclContext *dc) {
|
|
// FIXME: Should map to the module we want to import into (?).
|
|
if (dc->isTranslationUnit())
|
|
return firstClangModule;
|
|
|
|
auto decl = dyn_cast<clang::NamedDecl>(dc);
|
|
if (!decl)
|
|
return nullptr;
|
|
|
|
auto swiftDecl = importDecl(decl);
|
|
if (!swiftDecl)
|
|
return nullptr;
|
|
|
|
if (auto nominal = dyn_cast<NominalTypeDecl>(swiftDecl))
|
|
return nominal;
|
|
if (auto extension = dyn_cast<ExtensionDecl>(swiftDecl))
|
|
return extension;
|
|
if (auto constructor = dyn_cast<ConstructorDecl>(swiftDecl))
|
|
return constructor;
|
|
if (auto destructor = dyn_cast<DestructorDecl>(swiftDecl))
|
|
return destructor;
|
|
return nullptr;
|
|
}
|