clang-tools  10.0.0git
UnnecessaryValueParamCheck.h
Go to the documentation of this file.
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 {
17 namespace tidy {
18 namespace performance {
19 
20 /// A check that flags value parameters of expensive to copy types that
21 /// can safely be converted to const references.
22 ///
23 /// For the user-facing documentation see:
24 /// http://clang.llvm.org/extra/clang-tidy/checks/performance-unnecessary-value-param.html
26 public:
28  void registerMatchers(ast_matchers::MatchFinder *Finder) override;
29  void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
30  void registerPPCallbacks(const SourceManager &SM, Preprocessor *PP,
31  Preprocessor *ModuleExpanderPP) override;
32  void storeOptions(ClangTidyOptions::OptionMap &Opts) override;
33  void onEndOfTranslationUnit() override;
34 
35 private:
36  void handleMoveFix(const ParmVarDecl &Var, const DeclRefExpr &CopyArgument,
37  const ASTContext &Context);
38 
39  llvm::DenseMap<const FunctionDecl *, FunctionParmMutationAnalyzer>
40  MutationAnalyzers;
41  std::unique_ptr<utils::IncludeInserter> Inserter;
42  const utils::IncludeSorter::IncludeStyle IncludeStyle;
43  const std::vector<std::string> AllowedTypes;
44 };
45 
46 } // namespace performance
47 } // namespace tidy
48 } // namespace clang
49 
50 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_PERFORMANCE_UNNECESSARY_VALUE_PARAM_H
IncludeStyle
Supported include styles.
Definition: IncludeSorter.h:26
void storeOptions(ClangTidyOptions::OptionMap &Opts) override
Should store all options supported by this check with their current values or default values for opti...
Base class for all clang-tidy checks.
void registerPPCallbacks(const SourceManager &SM, Preprocessor *PP, Preprocessor *ModuleExpanderPP) override
Override this to register PPCallbacks in the preprocessor.
UnnecessaryValueParamCheck(StringRef Name, ClangTidyContext *Context)
A check that flags value parameters of expensive to copy types that can safely be converted to const ...
static constexpr llvm::StringLiteral Name
std::map< std::string, std::string > OptionMap
===– Representation.cpp - ClangDoc Representation --------—*- C++ -*-===//
Every ClangTidyCheck reports errors through a DiagnosticsEngine provided by this context.
void check(const ast_matchers::MatchFinder::MatchResult &Result) override
ClangTidyChecks that register ASTMatchers should do the actual work in here.
void registerMatchers(ast_matchers::MatchFinder *Finder) override
Override this to register AST matchers with Finder.