1//===--- UnusedReturnValueCheck.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_UNUSEDRETURNVALUECHECK_H
10#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_UNUSEDRETURNVALUECHECK_H
11
12#include "../ClangTidyCheck.h"
13#include <string>
14
15namespace clang::tidy::bugprone {
16
17/// Detects function calls where the return value is unused.
18///
19/// For the user-facing documentation see:
20/// http://clang.llvm.org/extra/clang-tidy/checks/bugprone/unused-return-value.html
21class UnusedReturnValueCheck : public ClangTidyCheck {
22public:
23 UnusedReturnValueCheck(StringRef Name, ClangTidyContext *Context);
24 void storeOptions(ClangTidyOptions::OptionMap &Opts) override;
25 void registerMatchers(ast_matchers::MatchFinder *Finder) override;
26 void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
27 std::optional<TraversalKind> getCheckTraversalKind() const override {
28 return TK_IgnoreUnlessSpelledInSource;
29 }
30
31private:
32 const std::vector<StringRef> CheckedFunctions;
33 const std::vector<StringRef> CheckedReturnTypes;
34
35protected:
36 UnusedReturnValueCheck(StringRef Name, ClangTidyContext *Context,
37 std::vector<StringRef> CheckedFunctions);
38 UnusedReturnValueCheck(StringRef Name, ClangTidyContext *Context,
39 std::vector<StringRef> CheckedFunctions,
40 std::vector<StringRef> CheckedReturnTypes,
41 bool AllowCastToVoid);
42 bool AllowCastToVoid;
43};
44
45} // namespace clang::tidy::bugprone
46
47#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_UNUSEDRETURNVALUECHECK_H
48

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