1 //===--- MoveConstArgCheck.h - clang-tidy -------------------------===//
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_MISC_MOVECONSTANTARGUMENTCHECK_H
10 #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MISC_MOVECONSTANTARGUMENTCHECK_H
11 
12 #include "../ClangTidyCheck.h"
13 #include "llvm/ADT/DenseSet.h"
14 
15 namespace clang {
16 namespace tidy {
17 namespace performance {
18 
19 /// Find casts of calculation results to bigger type. Typically from int to
20 ///
21 /// The options are
22 ///
23 ///   - `CheckTriviallyCopyableMove`: Whether to check for trivially-copyable
24 //      types as their objects are not moved but copied. Enabled by default.
25 //    - `CheckMoveToConstRef`: Whether to check if a `std::move()` is passed
26 //      as a const reference argument.
27 class MoveConstArgCheck : public ClangTidyCheck {
28 public:
MoveConstArgCheck(StringRef Name,ClangTidyContext * Context)29   MoveConstArgCheck(StringRef Name, ClangTidyContext *Context)
30       : ClangTidyCheck(Name, Context), CheckTriviallyCopyableMove(Options.get(
31                                            "CheckTriviallyCopyableMove", true)),
32         CheckMoveToConstRef(Options.get("CheckMoveToConstRef", true)) {}
isLanguageVersionSupported(const LangOptions & LangOpts)33   bool isLanguageVersionSupported(const LangOptions &LangOpts) const override {
34     return LangOpts.CPlusPlus;
35   }
36   void storeOptions(ClangTidyOptions::OptionMap &Opts) override;
37   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
38   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
39 
40 private:
41   const bool CheckTriviallyCopyableMove;
42   const bool CheckMoveToConstRef;
43   llvm::DenseSet<const CallExpr *> AlreadyCheckedMoves;
44 };
45 
46 } // namespace performance
47 } // namespace tidy
48 } // namespace clang
49 
50 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MISC_MOVECONSTANTARGUMENTCHECK_H
51