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1d961ba22d
Although I don't plan to bring over new assertions wholesale into the current qualification branch, it's entirely possible that various minor changes in main will use the new assertions; having this basic support in the release branch will simplify that. (This is why I'm adding the includes as a separate pass from rewriting the individual assertions)
125 lines
4.1 KiB
C++
125 lines
4.1 KiB
C++
//===--- ImportedModules.cpp -- generates the list of imported modules ----===//
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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 - 2017 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 "Dependencies.h"
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#include "swift/AST/ASTContext.h"
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#include "swift/AST/Decl.h"
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#include "swift/AST/DiagnosticEngine.h"
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#include "swift/AST/DiagnosticsFrontend.h"
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#include "swift/AST/Module.h"
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#include "swift/Basic/Assertions.h"
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#include "swift/Basic/LLVM.h"
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#include "swift/Basic/STLExtras.h"
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#include "swift/ClangImporter/ClangImporter.h"
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#include "swift/Frontend/FrontendOptions.h"
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#include "clang/Basic/Module.h"
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#include "llvm/ADT/SetVector.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/VirtualOutputBackend.h"
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using namespace swift;
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static StringRef getTopLevelName(const clang::Module *module) {
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return module->getTopLevelModule()->Name;
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}
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static void findAllClangImports(const clang::Module *module,
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llvm::SetVector<StringRef> &modules) {
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for (auto imported : module->Imports) {
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modules.insert(getTopLevelName(imported));
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}
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for (auto sub : module->submodules()) {
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findAllClangImports(sub, modules);
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}
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}
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bool swift::emitImportedModules(ModuleDecl *mainModule,
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const FrontendOptions &opts,
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llvm::vfs::OutputBackend &backend) {
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auto &Context = mainModule->getASTContext();
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std::string path = opts.InputsAndOutputs.getSingleOutputFilename();
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auto &diags = Context.Diags;
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auto out = backend.createFile(path);
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if (!out) {
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diags.diagnose(SourceLoc(), diag::error_opening_output,
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path, toString(out.takeError()));
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return true;
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}
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llvm::SetVector<StringRef> Modules;
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// Find the imports in the main Swift code.
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// We don't need `getTopLevelDeclsForDisplay()` here because we only care
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// about `ImportDecl`s.
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llvm::SmallVector<Decl *, 32> Decls;
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mainModule->getDisplayDecls(Decls);
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for (auto D : Decls) {
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auto ID = dyn_cast<ImportDecl>(D);
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if (!ID)
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continue;
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ImportPath::Builder scratch;
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auto modulePath = ID->getRealModulePath(scratch);
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// only the top-level name is needed (i.e. A in A.B.C)
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Modules.insert(modulePath[0].Item.str());
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}
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// And now look in the C code we're possibly using.
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auto clangImporter =
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static_cast<ClangImporter *>(Context.getClangModuleLoader());
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StringRef implicitHeaderPath = opts.ImplicitObjCHeaderPath;
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if (!implicitHeaderPath.empty()) {
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if (!clangImporter->importBridgingHeader(implicitHeaderPath, mainModule)) {
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SmallVector<ImportedModule, 16> imported;
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clangImporter->getImportedHeaderModule()->getImportedModules(
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imported, ModuleDecl::getImportFilterLocal());
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for (auto IM : imported) {
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if (auto clangModule = IM.importedModule->findUnderlyingClangModule())
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Modules.insert(getTopLevelName(clangModule));
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else
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assert(IM.importedModule->isStdlibModule() &&
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"unexpected non-stdlib swift module");
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}
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}
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}
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if (opts.ImportUnderlyingModule) {
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auto underlyingModule = clangImporter->loadModule(SourceLoc(),
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ImportPath::Module::Builder(mainModule->getName()).get());
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if (!underlyingModule) {
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Context.Diags.diagnose(SourceLoc(),
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diag::error_underlying_module_not_found,
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mainModule->getName());
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return true;
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}
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auto clangModule = underlyingModule->findUnderlyingClangModule();
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findAllClangImports(clangModule, Modules);
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}
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for (auto name : Modules) {
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*out << name << "\n";
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}
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if (auto error = out->keep()) {
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diags.diagnose(SourceLoc(), diag::error_closing_output,
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path, toString(std::move(error)));
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return true;
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}
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return false;
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}
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