UseNodiscardCheck.h

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//===--- UseNodiscardCheck.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_MODERNIZE_USENODISCARDCHECK_H
#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MODERNIZE_USENODISCARDCHECK_H
 
#include "../ClangTidyCheck.h"
 
namespace clang::tidy::modernize {
 
/// Add ``[[nodiscard]]`` to non-void const-member functions with no
/// arguments or pass-by-value or pass by const-reference arguments.
/// \code
///    bool empty() const;
///    bool empty(const Bar &) const;
///    bool empty(int bar) const;
/// \endcode
/// Is converted to:
/// \code
///    [[nodiscard]] bool empty() const;
///    [[nodiscard]] bool empty(const Bar &) const;
///    [[nodiscard]] bool empty(int bar) const;
/// \endcode
///
/// For the user-facing documentation see:
/// http://clang.llvm.org/extra/clang-tidy/checks/modernize/use-nodiscard.html
class UseNodiscardCheck : public ClangTidyCheck {
public:
  UseNodiscardCheck(StringRef Name, ClangTidyContext *Context);
  bool isLanguageVersionSupported(const LangOptions &LangOpts) const override;
  void storeOptions(ClangTidyOptions::OptionMap &Opts) override;
  void registerMatchers(ast_matchers::MatchFinder *Finder) override;
  void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
 
private:
  const StringRef NoDiscardMacro;
};
 
} // namespace clang::tidy::modernize
 
#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MODERNIZE_USENODISCARDCHECK_H