================ @@ -0,0 +1,118 @@ +//===----------------- ModuleFilesInfo.h -------------------------*- C++-*-===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// +// +// Experimental support for C++20 Modules. +// +// Currently we simplify the implementations by preventing reusing module files +// across different versions and different source files. But this is clearly a +// waste of time and space in the end of the day. +// +// FIXME: Supporting reusing module files across different versions and different +// source files. +// +//===----------------------------------------------------------------------===// + +#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANGD_MODULEFILESINFO_H +#define LLVM_CLANG_TOOLS_EXTRA_CLANGD_MODULEFILESINFO_H + +#include "Compiler.h" +#include "GlobalCompilationDatabase.h" +#include "ModuleDependencyScanner.h" +#include "support/Path.h" + +#include "clang/Lex/HeaderSearchOptions.h" + +#include "llvm/ADT/SmallString.h" +#include "llvm/ADT/StringMap.h" + +namespace clang { +namespace clangd { + +/// Store module files information for a single file. +/// +/// A ModuleFilesInfo should only be initialized by +/// `ModuleFilesInfo::buildModuleFilesInfoFor(PathRef, const ThreadsafeFS *, const GlobalCompilationDatabase &)` +/// static member method. This method will block the current thread and build all the needed +/// module files. All the built module files won't be shared with other source files. +/// +/// Users can detect whether the ModuleFilesInfo is still up to date by calling +/// the `CanReuse()` member function. +/// +/// The users should call `ReplaceHeaderSearchOptions(...)` or `ReplaceCompileCommands(CompileCommand&)` +/// member function to update the compilation commands to select the built module files first. +struct ModuleFilesInfo { + ModuleFilesInfo() = default; + ~ModuleFilesInfo(); + + ModuleFilesInfo(const ModuleFilesInfo &) = delete; + ModuleFilesInfo operator=(const ModuleFilesInfo &) = delete; + + ModuleFilesInfo(ModuleFilesInfo &&Other) + : Successed(std::exchange(Other.Successed, false)), + UniqueModuleFilesPathPrefix( + std::move(Other.UniqueModuleFilesPathPrefix)), + DependentModuleNames(std::move(Other.DependentModuleNames)) { + Other.UniqueModuleFilesPathPrefix.clear(); + } + ModuleFilesInfo &operator=(ModuleFilesInfo &&Other) { + if (this == &Other) + return *this; + + this->~ModuleFilesInfo(); + new (this) ModuleFilesInfo(std::move(Other)); + + return *this; + } + + /// Build all the required module files for \param File. + /// Note that only the module files recorded by \param CDB can be built. + static ModuleFilesInfo + buildModuleFilesInfoFor(PathRef File, const ThreadsafeFS *TFS, + const GlobalCompilationDatabase &CDB); + + /// Return true if the modile file specified by ModuleName is built. + /// Note that this interface will only check the existence of the module + /// file instead of checking the validness of the module file. + bool IsModuleUnitBuilt(StringRef ModuleName) const; + + /// Change commands to load the module files recorded in this ModuleFilesInfo ---------------- ChuanqiXu9 wrote:
Done. https://github.com/llvm/llvm-project/pull/66462 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
