1//===--- ReturnConstRefFromParameterCheck.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_BUGPRONE_RETURNCONSTREFFROMPARAMETERCHECK_H
10#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_RETURNCONSTREFFROMPARAMETERCHECK_H
11
12#include "../ClangTidyCheck.h"
13
14namespace clang::tidy::bugprone {
15
16/// Detects return statements that return a constant reference parameter as
17/// constant reference. This may cause use-after-free errors if the caller uses
18/// xvalues as arguments.
19///
20/// For the user-facing documentation see:
21/// http://clang.llvm.org/extra/clang-tidy/checks/bugprone/return-const-ref-from-parameter.html
22class ReturnConstRefFromParameterCheck : public ClangTidyCheck {
23public:
24 ReturnConstRefFromParameterCheck(StringRef Name, ClangTidyContext *Context)
25 : ClangTidyCheck(Name, Context) {}
26 void registerMatchers(ast_matchers::MatchFinder *Finder) override;
27 void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
28 std::optional<TraversalKind> getCheckTraversalKind() const override {
29 // Use 'AsIs' to make sure the return type is exactly the same as the
30 // parameter type.
31 return TK_AsIs;
32 }
33 bool isLanguageVersionSupported(const LangOptions &LangOpts) const override {
34 return LangOpts.CPlusPlus;
35 }
36};
37
38} // namespace clang::tidy::bugprone
39
40#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_RETURNCONSTREFFROMPARAMETERCHECK_H
41

source code of clang-tools-extra/clang-tidy/bugprone/ReturnConstRefFromParameterCheck.h