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//===--- UnnecessaryCopyInitialization.h - clang-tidy------------*- C++ -*-===//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
#include "../ClangTidyCheck.h"
#include "clang/AST/Decl.h"
namespace clang {
namespace tidy {
namespace performance {
// The check detects local variable declarations that are copy initialized with
// the const reference of a function call or the const reference of a method
// call whose object is guaranteed to outlive the variable's scope and suggests
// to use a const reference.
// The check currently only understands a subset of variables that are
// guaranteed to outlive the const reference returned, namely: const variables,
// const references, and const pointers to const.
class UnnecessaryCopyInitialization : public ClangTidyCheck {
UnnecessaryCopyInitialization(StringRef Name, ClangTidyContext *Context);
bool isLanguageVersionSupported(const LangOptions &LangOpts) const override{
return LangOpts.CPlusPlus;
void registerMatchers(ast_matchers::MatchFinder *Finder) override;
void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
void storeOptions(ClangTidyOptions::OptionMap &Opts) override;
void handleCopyFromMethodReturn(const VarDecl &Var, const Stmt &BlockStmt,
const DeclStmt &Stmt, bool IssueFix,
const VarDecl *ObjectArg,
ASTContext &Context);
void handleCopyFromLocalVar(const VarDecl &NewVar, const VarDecl &OldVar,
const Stmt &BlockStmt, const DeclStmt &Stmt,
bool IssueFix, ASTContext &Context);
const std::vector<std::string> AllowedTypes;
const std::vector<std::string> ExcludedContainerTypes;
} // namespace performance
} // namespace tidy
} // namespace clang