clang-tidy/bugprone/ForwardingReferenceOverloadCheck.h

0001 //===--- ForwardingReferenceOverloadCheck.h - clang-tidy---------*- C++ -*-===//
0002 //
0003 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0004 // See https://llvm.org/LICENSE.txt for license information.
0005 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0006 //
0007 //===----------------------------------------------------------------------===//
0008
0009 #ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_FORWARDINGREFERENCEOVERLOADCHECK_H
0010 #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_FORWARDINGREFERENCEOVERLOADCHECK_H
0011
0012 #include "../ClangTidyCheck.h"
0013
0014 namespace clang::tidy::bugprone {
0015
0016 /// The checker looks for constructors that can act as copy or move constructors
0017 /// through their forwarding reference parameters. If a non const lvalue
0018 /// reference is passed to the constructor, the forwarding reference parameter
0019 /// can be a perfect match while the const reference parameter of the copy
0020 /// constructor can't. The forwarding reference constructor will be called,
0021 /// which can lead to confusion.
0022 /// For detailed description of this problem see: Scott Meyers, Effective Modern
0023 /// C++ Design, item 26.
0024 ///
0025 /// For the user-facing documentation see:
0026 /// http://clang.llvm.org/extra/clang-tidy/checks/bugprone/forwarding-reference-overload.html
0027 class ForwardingReferenceOverloadCheck : public ClangTidyCheck {
0028 public:
0029   ForwardingReferenceOverloadCheck(StringRef Name, ClangTidyContext *Context)
0030       : ClangTidyCheck(Name, Context) {}
0031   bool isLanguageVersionSupported(const LangOptions &LangOpts) const override {
0032     return LangOpts.CPlusPlus11;
0033   }
0034   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
0035   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
0036 };
0037
0038 } // namespace clang::tidy::bugprone
0039
0040 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_FORWARDINGREFERENCEOVERLOADCHECK_H