| //===--- UnnecessaryCopyInitialization.h - clang-tidy------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_PERFORMANCE_UNNECESSARY_COPY_INITIALIZATION_H |
| #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_PERFORMANCE_UNNECESSARY_COPY_INITIALIZATION_H |
| |
| #include "../ClangTidy.h" |
| |
| namespace clang { |
| namespace tidy { |
| namespace performance { |
| |
| // The check detects local variable declarations that are copy initialized with |
| // the const reference of a function call or the const reference of a method |
| // call whose object is guaranteed to outlive the variable's scope and suggests |
| // to use a const reference. |
| // |
| // The check currently only understands a subset of variables that are |
| // guaranteed to outlive the const reference returned, namely: const variables, |
| // const references, and const pointers to const. |
| class UnnecessaryCopyInitialization : public ClangTidyCheck { |
| public: |
| UnnecessaryCopyInitialization(StringRef Name, ClangTidyContext *Context) |
| : ClangTidyCheck(Name, Context) {} |
| void registerMatchers(ast_matchers::MatchFinder *Finder) override; |
| void check(const ast_matchers::MatchFinder::MatchResult &Result) override; |
| |
| private: |
| void handleCopyFromMethodReturn(const VarDecl &Var, const Stmt &BlockStmt, |
| bool IssueFix, const VarDecl *ObjectArg, |
| ASTContext &Context); |
| void handleCopyFromLocalVar(const VarDecl &NewVar, const VarDecl &OldVar, |
| const Stmt &BlockStmt, bool IssueFix, |
| ASTContext &Context); |
| }; |
| |
| } // namespace performance |
| } // namespace tidy |
| } // namespace clang |
| |
| #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_PERFORMANCE_UNNECESSARY_COPY_INITIALIZATION_H |