forked from OSchip/llvm-project
93 lines
3.3 KiB
C++
93 lines
3.3 KiB
C++
//===--- ReplaceDisallowCopyAndAssignMacroCheck.cpp - clang-tidy ----------===//
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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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#include "ReplaceDisallowCopyAndAssignMacroCheck.h"
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#include "clang/Frontend/CompilerInstance.h"
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#include "clang/Lex/MacroArgs.h"
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#include "clang/Lex/PPCallbacks.h"
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#include "clang/Lex/Preprocessor.h"
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#include "llvm/Support/FormatVariadic.h"
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namespace clang {
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namespace tidy {
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namespace modernize {
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namespace {
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class ReplaceDisallowCopyAndAssignMacroCallbacks : public PPCallbacks {
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public:
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explicit ReplaceDisallowCopyAndAssignMacroCallbacks(
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ReplaceDisallowCopyAndAssignMacroCheck &Check, Preprocessor &PP)
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: Check(Check), PP(PP) {}
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void MacroExpands(const Token &MacroNameTok, const MacroDefinition &MD,
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SourceRange Range, const MacroArgs *Args) override {
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IdentifierInfo *Info = MacroNameTok.getIdentifierInfo();
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if (!Info || !Args || Args->getNumMacroArguments() != 1)
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return;
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if (Info->getName() != Check.getMacroName())
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return;
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// The first argument to the DISALLOW_COPY_AND_ASSIGN macro is expected to
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// be the class name.
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const Token *ClassNameTok = Args->getUnexpArgument(0);
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if (Args->ArgNeedsPreexpansion(ClassNameTok, PP))
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// For now we only support simple argument that don't need to be
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// pre-expanded.
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return;
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clang::IdentifierInfo *ClassIdent = ClassNameTok->getIdentifierInfo();
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if (!ClassIdent)
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return;
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std::string Replacement = llvm::formatv(
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R"cpp({0}(const {0} &) = delete;
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const {0} &operator=(const {0} &) = delete{1})cpp",
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ClassIdent->getName(), shouldAppendSemi(Range) ? ";" : "");
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Check.diag(MacroNameTok.getLocation(),
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"prefer deleting copy constructor and assignment operator over "
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"using macro '%0'")
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<< Check.getMacroName()
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<< FixItHint::CreateReplacement(
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PP.getSourceManager().getExpansionRange(Range), Replacement);
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}
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private:
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/// \returns \c true if the next token after the given \p MacroLoc is \b not a
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/// semicolon.
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bool shouldAppendSemi(SourceRange MacroLoc) {
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llvm::Optional<Token> Next = Lexer::findNextToken(
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MacroLoc.getEnd(), PP.getSourceManager(), PP.getLangOpts());
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return !(Next && Next->is(tok::semi));
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}
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ReplaceDisallowCopyAndAssignMacroCheck &Check;
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Preprocessor &PP;
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};
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} // namespace
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ReplaceDisallowCopyAndAssignMacroCheck::ReplaceDisallowCopyAndAssignMacroCheck(
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StringRef Name, ClangTidyContext *Context)
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: ClangTidyCheck(Name, Context),
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MacroName(Options.get("MacroName", "DISALLOW_COPY_AND_ASSIGN")) {}
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void ReplaceDisallowCopyAndAssignMacroCheck::registerPPCallbacks(
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const SourceManager &SM, Preprocessor *PP, Preprocessor *ModuleExpanderPP) {
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PP->addPPCallbacks(
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::std::make_unique<ReplaceDisallowCopyAndAssignMacroCallbacks>(
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*this, *ModuleExpanderPP));
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}
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void ReplaceDisallowCopyAndAssignMacroCheck::storeOptions(
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ClangTidyOptions::OptionMap &Opts) {
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Options.store(Opts, "MacroName", MacroName);
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}
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} // namespace modernize
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} // namespace tidy
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} // namespace clang
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