| //===--- ReturnConstRefFromParameterCheck.h - clang-tidy --------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_RETURNCONSTREFFROMPARAMETERCHECK_H |
| #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_RETURNCONSTREFFROMPARAMETERCHECK_H |
| |
| #include "../ClangTidyCheck.h" |
| |
| namespace clang::tidy::bugprone { |
| |
| /// Detects return statements that return a constant reference parameter as |
| /// constant reference. This may cause use-after-free errors if the caller uses |
| /// xvalues as arguments. |
| /// |
| /// For the user-facing documentation see: |
| /// http://clang.llvm.org/extra/clang-tidy/checks/bugprone/return-const-ref-from-parameter.html |
| class ReturnConstRefFromParameterCheck : public ClangTidyCheck { |
| public: |
| ReturnConstRefFromParameterCheck(StringRef Name, ClangTidyContext *Context) |
| : ClangTidyCheck(Name, Context) {} |
| void registerMatchers(ast_matchers::MatchFinder *Finder) override; |
| void check(const ast_matchers::MatchFinder::MatchResult &Result) override; |
| std::optional<TraversalKind> getCheckTraversalKind() const override { |
| // Use 'AsIs' to make sure the return type is exactly the same as the |
| // parameter type. |
| return TK_AsIs; |
| } |
| bool isLanguageVersionSupported(const LangOptions &LangOpts) const override { |
| return LangOpts.CPlusPlus; |
| } |
| }; |
| |
| } // namespace clang::tidy::bugprone |
| |
| #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_RETURNCONSTREFFROMPARAMETERCHECK_H |