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1//===----------------------------------------------------------------------===//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-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_SIGNEDCHARMISUSECHECK_H10#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_SIGNEDCHARMISUSECHECK_H11 12#include "../ClangTidyCheck.h"13 14namespace clang::tidy::bugprone {15 16/// Finds those ``signed char`` -> integer conversions which might indicate a17/// programming error. The basic problem with the ``signed char``, that it might18/// store the non-ASCII characters as negative values. This behavior can cause a19/// misunderstanding of the written code both when an explicit and when an20/// implicit conversion happens.21///22/// For the user-facing documentation see:23/// https://clang.llvm.org/extra/clang-tidy/checks/bugprone/signed-char-misuse.html24class SignedCharMisuseCheck : public ClangTidyCheck {25public:26 SignedCharMisuseCheck(StringRef Name, ClangTidyContext *Context);27 28 void storeOptions(ClangTidyOptions::OptionMap &Opts) override;29 void registerMatchers(ast_matchers::MatchFinder *Finder) override;30 void check(const ast_matchers::MatchFinder::MatchResult &Result) override;31 32private:33 ast_matchers::internal::BindableMatcher<clang::Stmt> charCastExpression(34 bool IsSigned,35 const ast_matchers::internal::Matcher<clang::QualType> &IntegerType,36 const std::string &CastBindName) const;37 38 const StringRef CharTypedefsToIgnoreList;39 const bool DiagnoseSignedUnsignedCharComparisons;40};41 42} // namespace clang::tidy::bugprone43 44#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_SIGNEDCHARMISUSECHECK_H45