1 //===--- MoveConstArgCheck.h - clang-tidy -------------------------===// 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_MISC_MOVECONSTANTARGUMENTCHECK_H 10 #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MISC_MOVECONSTANTARGUMENTCHECK_H 11 12 #include "../ClangTidyCheck.h" 13 #include "llvm/ADT/DenseSet.h" 14 15 namespace clang::tidy::performance { 16 17 /// Find casts of calculation results to bigger type. Typically from int to 18 /// 19 /// The options are 20 /// 21 /// - `CheckTriviallyCopyableMove`: Whether to check for trivially-copyable 22 // types as their objects are not moved but copied. Enabled by default. 23 // - `CheckMoveToConstRef`: Whether to check if a `std::move()` is passed 24 // as a const reference argument. 25 class MoveConstArgCheck : public ClangTidyCheck { 26 public: MoveConstArgCheck(StringRef Name,ClangTidyContext * Context)27 MoveConstArgCheck(StringRef Name, ClangTidyContext *Context) 28 : ClangTidyCheck(Name, Context), CheckTriviallyCopyableMove(Options.get( 29 "CheckTriviallyCopyableMove", true)), 30 CheckMoveToConstRef(Options.get("CheckMoveToConstRef", true)) {} isLanguageVersionSupported(const LangOptions & LangOpts)31 bool isLanguageVersionSupported(const LangOptions &LangOpts) const override { 32 return LangOpts.CPlusPlus; 33 } 34 void storeOptions(ClangTidyOptions::OptionMap &Opts) override; 35 void registerMatchers(ast_matchers::MatchFinder *Finder) override; 36 void check(const ast_matchers::MatchFinder::MatchResult &Result) override; 37 38 private: 39 const bool CheckTriviallyCopyableMove; 40 const bool CheckMoveToConstRef; 41 llvm::DenseSet<const CallExpr *> AlreadyCheckedMoves; 42 }; 43 44 } // namespace clang::tidy::performance 45 46 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MISC_MOVECONSTANTARGUMENTCHECK_H 47