1 //===--- InefficientVectorOperationCheck.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_PERFORMANCE_INEFFICIENT_VECTOR_OPERATION_H 10 #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_PERFORMANCE_INEFFICIENT_VECTOR_OPERATION_H 11 12 #include "../ClangTidyCheck.h" 13 14 namespace clang::tidy::performance { 15 16 /// Finds possible inefficient `std::vector` operations (e.g. `push_back`) in 17 /// for loops that may cause unnecessary memory reallocations. 18 /// 19 /// When EnableProto, also finds calls that add element to protobuf repeated 20 /// field without calling Reserve() first. 21 /// 22 /// For the user-facing documentation see: 23 /// http://clang.llvm.org/extra/clang-tidy/checks/performance/inefficient-vector-operation.html 24 class InefficientVectorOperationCheck : public ClangTidyCheck { 25 public: 26 InefficientVectorOperationCheck(StringRef Name, ClangTidyContext *Context); isLanguageVersionSupported(const LangOptions & LangOpts)27 bool isLanguageVersionSupported(const LangOptions &LangOpts) const override{ 28 return LangOpts.CPlusPlus; 29 } 30 void registerMatchers(ast_matchers::MatchFinder *Finder) override; 31 void check(const ast_matchers::MatchFinder::MatchResult &Result) override; 32 void storeOptions(ClangTidyOptions::OptionMap &Opts) override; 33 34 private: 35 void addMatcher(const ast_matchers::DeclarationMatcher &TargetRecordDecl, 36 StringRef VarDeclName, StringRef VarDeclStmtName, 37 const ast_matchers::DeclarationMatcher &AppendMethodDecl, 38 StringRef AppendCallName, ast_matchers::MatchFinder *Finder); 39 const std::vector<StringRef> VectorLikeClasses; 40 41 // If true, also check inefficient operations for proto repeated fields. 42 bool EnableProto; 43 }; 44 45 } // namespace clang::tidy::performance 46 47 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_PERFORMANCE_INEFFICIENT_VECTOR_OPERATION_H 48