clang-tools 6.0.0

UnnecessaryCopyInitialization.h
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1 //===--- UnnecessaryCopyInitialization.h - clang-tidy------------*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 #ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_PERFORMANCE_UNNECESSARY_COPY_INITIALIZATION_H
11 #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_PERFORMANCE_UNNECESSARY_COPY_INITIALIZATION_H
12
13 #include "../ClangTidy.h"
14
15 namespace clang {
16 namespace tidy {
17 namespace performance {
18
19 // The check detects local variable declarations that are copy initialized with
20 // the const reference of a function call or the const reference of a method
21 // call whose object is guaranteed to outlive the variable's scope and suggests
22 // to use a const reference.
23 //
24 // The check currently only understands a subset of variables that are
25 // guaranteed to outlive the const reference returned, namely: const variables,
26 // const references, and const pointers to const.
27 class UnnecessaryCopyInitialization : public ClangTidyCheck {
28 public:
29 UnnecessaryCopyInitialization(StringRef Name, ClangTidyContext *Context)
30 : ClangTidyCheck(Name, Context) {}
31 void registerMatchers(ast_matchers::MatchFinder *Finder) override;
32 void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
33
34 private:
35 void handleCopyFromMethodReturn(const VarDecl &Var, const Stmt &BlockStmt,
36 bool IssueFix, const VarDecl *ObjectArg,
37 ASTContext &Context);
38 void handleCopyFromLocalVar(const VarDecl &NewVar, const VarDecl &OldVar,
39 const Stmt &BlockStmt, bool IssueFix,
40 ASTContext &Context);
41 };
42
43 } // namespace performance
44 } // namespace tidy
45 } // namespace clang
46
47 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_PERFORMANCE_UNNECESSARY_COPY_INITIALIZATION_H
clang::tidy::performance::UnnecessaryCopyInitialization
Definition: UnnecessaryCopyInitialization.h:27
Name
StringHandle Name
Definition: PreprocessorTracker.cpp:525
clang::tidy::performance::UnnecessaryCopyInitialization::registerMatchers
void registerMatchers(ast_matchers::MatchFinder *Finder) override
Override this to register AST matchers with Finder.
Definition: UnnecessaryCopyInitialization.cpp:33
clang::tidy::ClangTidyCheck
Base class for all clang-tidy checks.
Definition: ClangTidy.h:127
clang::tidy::performance::UnnecessaryCopyInitialization::UnnecessaryCopyInitialization
UnnecessaryCopyInitialization(StringRef Name, ClangTidyContext *Context)
Definition: UnnecessaryCopyInitialization.h:29
clang
Definition: AndroidTidyModule.cpp:28
clang::tidy::ClangTidyContext
Every ClangTidyCheck reports errors through a DiagnosticsEngine provided by this context.
Definition: ClangTidyDiagnosticConsumer.h:104
clang::tidy::performance::UnnecessaryCopyInitialization::check
void check(const ast_matchers::MatchFinder::MatchResult &Result) override
ClangTidyChecks that register ASTMatchers should do the actual work in here.
Definition: UnnecessaryCopyInitialization.cpp:80