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 15 namespace 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 21 class UnusedReturnValueCheck : public ClangTidyCheck { 22 public: 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; getCheckTraversalKind()27 std::optional<TraversalKind> getCheckTraversalKind() const override { 28 return TK_IgnoreUnlessSpelledInSource; 29 } 30 31 private: 32 const std::vector<StringRef> CheckedFunctions; 33 const std::vector<StringRef> CheckedReturnTypes; 34 35 protected: 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