| 1 | //===--- UnnecessaryValueParamCheck.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_UNNECESSARY_VALUE_PARAM_H |
| 10 | #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_PERFORMANCE_UNNECESSARY_VALUE_PARAM_H |
| 11 | |
| 12 | #include "../ClangTidyCheck.h" |
| 13 | #include "../utils/IncludeInserter.h" |
| 14 | #include "clang/Analysis/Analyses/ExprMutationAnalyzer.h" |
| 15 | |
| 16 | namespace clang::tidy::performance { |
| 17 | |
| 18 | /// A check that flags value parameters of expensive to copy types that |
| 19 | /// can safely be converted to const references. |
| 20 | /// |
| 21 | /// For the user-facing documentation see: |
| 22 | /// http://clang.llvm.org/extra/clang-tidy/checks/performance/unnecessary-value-param.html |
| 23 | class UnnecessaryValueParamCheck : public ClangTidyCheck { |
| 24 | public: |
| 25 | UnnecessaryValueParamCheck(StringRef Name, ClangTidyContext *Context); |
| 26 | bool isLanguageVersionSupported(const LangOptions &LangOpts) const override { |
| 27 | return LangOpts.CPlusPlus; |
| 28 | } |
| 29 | void registerMatchers(ast_matchers::MatchFinder *Finder) override; |
| 30 | void check(const ast_matchers::MatchFinder::MatchResult &Result) override; |
| 31 | void registerPPCallbacks(const SourceManager &SM, Preprocessor *PP, |
| 32 | Preprocessor *ModuleExpanderPP) override; |
| 33 | void storeOptions(ClangTidyOptions::OptionMap &Opts) override; |
| 34 | void onEndOfTranslationUnit() override; |
| 35 | |
| 36 | private: |
| 37 | void handleMoveFix(const ParmVarDecl &Var, const DeclRefExpr &CopyArgument, |
| 38 | const ASTContext &Context); |
| 39 | |
| 40 | ExprMutationAnalyzer::Memoized MutationAnalyzerCache; |
| 41 | utils::IncludeInserter Inserter; |
| 42 | const std::vector<StringRef> AllowedTypes; |
| 43 | }; |
| 44 | |
| 45 | } // namespace clang::tidy::performance |
| 46 | |
| 47 | #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_PERFORMANCE_UNNECESSARY_VALUE_PARAM_H |
| 48 |