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
16namespace 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
23class UnnecessaryValueParamCheck : public ClangTidyCheck {
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};
50
51} // namespace clang::tidy::performance
52
53#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_PERFORMANCE_UNNECESSARY_VALUE_PARAM_H
54

Provided by KDAB

Privacy Policy
Improve your Profiling and Debugging skills
Find out more

source code of clang-tools-extra/clang-tidy/performance/UnnecessaryValueParamCheck.h