clang-tools 22.0.0git
UnnecessaryValueParamCheck.h
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1//===----------------------------------------------------------------------===//
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"
14#include "clang/Analysis/Analyses/ExprMutationAnalyzer.h"
15
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/// https://clang.llvm.org/extra/clang-tidy/checks/performance/unnecessary-value-param.html
24public:
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
36protected:
37 // Create diagnostics. These are virtual so that derived classes can change
38 // behaviour.
39 virtual void handleMoveFix(const ParmVarDecl &Param,
40 const DeclRefExpr &CopyArgument,
41 ASTContext &Context);
42 virtual void handleConstRefFix(const FunctionDecl &Function,
43 const ParmVarDecl &Param, ASTContext &Context);
44
45private:
46 ExprMutationAnalyzer::Memoized MutationAnalyzerCache;
47 utils::IncludeInserter Inserter;
48 const std::vector<StringRef> AllowedTypes;
49 bool IgnoreCoroutines;
50};
51
52} // namespace clang::tidy::performance
53
54#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_PERFORMANCE_UNNECESSARY_VALUE_PARAM_H
Every ClangTidyCheck reports errors through a DiagnosticsEngine provided by this context.
void storeOptions(ClangTidyOptions::OptionMap &Opts) override
bool isLanguageVersionSupported(const LangOptions &LangOpts) const override
void registerPPCallbacks(const SourceManager &SM, Preprocessor *PP, Preprocessor *ModuleExpanderPP) override
void registerMatchers(ast_matchers::MatchFinder *Finder) override
void check(const ast_matchers::MatchFinder::MatchResult &Result) override
UnnecessaryValueParamCheck(StringRef Name, ClangTidyContext *Context)
virtual void handleMoveFix(const ParmVarDecl &Param, const DeclRefExpr &CopyArgument, ASTContext &Context)
virtual void handleConstRefFix(const FunctionDecl &Function, const ParmVarDecl &Param, ASTContext &Context)
llvm::StringMap< ClangTidyValue > OptionMap