clang-tools-extra/clang-tidy/bugprone/ForwardingReferenceOverloadCheck.h

//===--- ForwardingReferenceOverloadCheck.h - clang-tidy---------*- 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_CLANG_TIDY_BUGPRONE_FORWARDINGREFERENCEOVERLOADCHECK_H
#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_FORWARDINGREFERENCEOVERLOADCHECK_H

#include "../ClangTidyCheck.h"

namespace clang {
namespace tidy {
namespace bugprone {

/// The checker looks for constructors that can act as copy or move constructors
/// through their forwarding reference parameters. If a non const lvalue
/// reference is passed to the constructor, the forwarding reference parameter
/// can be a perfect match while the const reference parameter of the copy
/// constructor can't. The forwarding reference constructor will be called,
/// which can lead to confusion.
/// For detailed description of this problem see: Scott Meyers, Effective Modern
/// C++ Design, item 26.
///
/// For the user-facing documentation see:
/// http://clang.llvm.org/extra/clang-tidy/checks/bugprone-forwarding-reference-overload.html
class ForwardingReferenceOverloadCheck : public ClangTidyCheck {
public:
  ForwardingReferenceOverloadCheck(StringRef Name, ClangTidyContext *Context)
      : ClangTidyCheck(Name, Context) {}
  bool isLanguageVersionSupported(const LangOptions &LangOpts) const override {
    return LangOpts.CPlusPlus11;
  }
  void registerMatchers(ast_matchers::MatchFinder *Finder) override;
  void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
};

} // namespace bugprone
} // namespace tidy
} // namespace clang

#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_FORWARDINGREFERENCEOVERLOADCHECK_H