clang-tools 19.0.0git
UnnecessaryValueParamCheck.h
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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
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
24public:
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
36private:
37 void handleMoveFix(const ParmVarDecl &Var, const DeclRefExpr &CopyArgument,
38 const ASTContext &Context);
39
40 llvm::DenseMap<const FunctionDecl *, FunctionParmMutationAnalyzer>
41 MutationAnalyzers;
43 const std::vector<StringRef> AllowedTypes;
44};
45
46} // namespace clang::tidy::performance
47
48#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_PERFORMANCE_UNNECESSARY_VALUE_PARAM_H
llvm::SmallString< 256U > Name
Base class for all clang-tidy checks.
Every ClangTidyCheck reports errors through a DiagnosticsEngine provided by this context.
A check that flags value parameters of expensive to copy types that can safely be converted to const ...
void storeOptions(ClangTidyOptions::OptionMap &Opts) override
Should store all options supported by this check with their current values or default values for opti...
bool isLanguageVersionSupported(const LangOptions &LangOpts) const override
Override this to disable registering matchers and PP callbacks if an invalid language version is bein...
void registerPPCallbacks(const SourceManager &SM, Preprocessor *PP, Preprocessor *ModuleExpanderPP) override
Override this to register PPCallbacks in the preprocessor.
void registerMatchers(ast_matchers::MatchFinder *Finder) override
Override this to register AST matchers with Finder.
void check(const ast_matchers::MatchFinder::MatchResult &Result) override
ClangTidyChecks that register ASTMatchers should do the actual work in here.
Produces fixes to insert specified includes to source files, if not yet present.
llvm::StringMap< ClangTidyValue > OptionMap