1 //===--- ForwardingReferenceOverloadCheck.h - clang-tidy---------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_FORWARDINGREFERENCEOVERLOADCHECK_H 10 #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_FORWARDINGREFERENCEOVERLOADCHECK_H 11 12 #include "../ClangTidyCheck.h" 13 14 namespace clang::tidy::bugprone { 15 16 /// The checker looks for constructors that can act as copy or move constructors 17 /// through their forwarding reference parameters. If a non const lvalue 18 /// reference is passed to the constructor, the forwarding reference parameter 19 /// can be a perfect match while the const reference parameter of the copy 20 /// constructor can't. The forwarding reference constructor will be called, 21 /// which can lead to confusion. 22 /// For detailed description of this problem see: Scott Meyers, Effective Modern 23 /// C++ Design, item 26. 24 /// 25 /// For the user-facing documentation see: 26 /// http://clang.llvm.org/extra/clang-tidy/checks/bugprone/forwarding-reference-overload.html 27 class ForwardingReferenceOverloadCheck : public ClangTidyCheck { 28 public: ForwardingReferenceOverloadCheck(StringRef Name,ClangTidyContext * Context)29 ForwardingReferenceOverloadCheck(StringRef Name, ClangTidyContext *Context) 30 : ClangTidyCheck(Name, Context) {} isLanguageVersionSupported(const LangOptions & LangOpts)31 bool isLanguageVersionSupported(const LangOptions &LangOpts) const override { 32 return LangOpts.CPlusPlus11; 33 } 34 void registerMatchers(ast_matchers::MatchFinder *Finder) override; 35 void check(const ast_matchers::MatchFinder::MatchResult &Result) override; 36 }; 37 38 } // namespace clang::tidy::bugprone 39 40 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_FORWARDINGREFERENCEOVERLOADCHECK_H 41