forked from OSchip/llvm-project
97 lines
3.1 KiB
C++
97 lines
3.1 KiB
C++
//===--- CollectMacros.h -----------------------------------------*- C++-*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANGD_COLLECTEDMACROS_H
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#define LLVM_CLANG_TOOLS_EXTRA_CLANGD_COLLECTEDMACROS_H
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#include "Protocol.h"
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#include "SourceCode.h"
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#include "clang/Basic/IdentifierTable.h"
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#include "clang/Lex/PPCallbacks.h"
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#include <string>
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namespace clang {
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namespace clangd {
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struct MainFileMacros {
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llvm::StringSet<> Names;
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// Instead of storing SourceLocation, we have to store the token range because
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// SourceManager from preamble is not available when we build the AST.
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std::vector<Range> Ranges;
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};
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/// Collects macro references (e.g. definitions, expansions) in the main file.
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/// It is used to:
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/// - collect macros in the preamble section of the main file (in Preamble.cpp)
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/// - collect macros after the preamble of the main file (in ParsedAST.cpp)
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class CollectMainFileMacros : public PPCallbacks {
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public:
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explicit CollectMainFileMacros(const SourceManager &SM,
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const LangOptions &LangOpts,
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MainFileMacros &Out)
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: SM(SM), LangOpts(LangOpts), Out(Out) {}
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void FileChanged(SourceLocation Loc, FileChangeReason,
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SrcMgr::CharacteristicKind, FileID) override {
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InMainFile = isInsideMainFile(Loc, SM);
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}
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void MacroDefined(const Token &MacroName, const MacroDirective *MD) override {
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add(MacroName, MD->getMacroInfo());
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}
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void MacroExpands(const Token &MacroName, const MacroDefinition &MD,
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SourceRange Range, const MacroArgs *Args) override {
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add(MacroName, MD.getMacroInfo());
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}
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void MacroUndefined(const clang::Token &MacroName,
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const clang::MacroDefinition &MD,
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const clang::MacroDirective *Undef) override {
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add(MacroName, MD.getMacroInfo());
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}
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void Ifdef(SourceLocation Loc, const Token &MacroName,
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const MacroDefinition &MD) override {
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add(MacroName, MD.getMacroInfo());
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}
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void Ifndef(SourceLocation Loc, const Token &MacroName,
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const MacroDefinition &MD) override {
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add(MacroName, MD.getMacroInfo());
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}
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void Defined(const Token &MacroName, const MacroDefinition &MD,
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SourceRange Range) override {
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add(MacroName, MD.getMacroInfo());
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}
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private:
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void add(const Token &MacroNameTok, const MacroInfo *MI) {
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if (!InMainFile)
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return;
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auto Loc = MacroNameTok.getLocation();
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if (Loc.isMacroID())
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return;
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if (auto Range = getTokenRange(SM, LangOpts, Loc)) {
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Out.Names.insert(MacroNameTok.getIdentifierInfo()->getName());
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Out.Ranges.push_back(*Range);
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}
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}
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const SourceManager &SM;
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const LangOptions &LangOpts;
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bool InMainFile = true;
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MainFileMacros &Out;
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};
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} // namespace clangd
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} // namespace clang
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#endif // LLVM_CLANG_TOOLS_EXTRA_CLANGD_COLLECTEDMACROS_H
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