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