clang-tools-extra/clang-tidy/bugprone/ImplicitWideningOfMultiplicationResultCheck.h

   1 //===--- ImplicitWideningOfMultiplicationResultCheck.h ----------*- 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_IMPLICITWIDENINGOFMULTIPLICATIONRESULTCHECK_H
  10 #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_IMPLICITWIDENINGOFMULTIPLICATIONRESULTCHECK_H
  11
  12 #include "../ClangTidyCheck.h"
  13 #include "../utils/IncludeInserter.h"
  14 #include <optional>
  15
  16 namespace clang::tidy::bugprone {
  17
  18 /// Diagnoses instances of an implicit widening of multiplication result.
  19 ///
  20 /// For the user-facing documentation see:
  21 /// http://clang.llvm.org/extra/clang-tidy/checks/bugprone/implicit-widening-of-multiplication-result.html
  22 class ImplicitWideningOfMultiplicationResultCheck : public ClangTidyCheck {
  23   const ast_matchers::MatchFinder::MatchResult *Result;
  24   bool ShouldUseCXXStaticCast;
  25   bool ShouldUseCXXHeader;
  26
  27   std::optional<FixItHint> includeStddefHeader(SourceLocation File);
  28
  29   void handleImplicitCastExpr(const ImplicitCastExpr *ICE);
  30   void handlePointerOffsetting(const Expr *E);
  31
  32 public:
  33   ImplicitWideningOfMultiplicationResultCheck(StringRef Name,
  34                                               ClangTidyContext *Context);
  35   void registerPPCallbacks(const SourceManager &SM, Preprocessor *PP,
  36                            Preprocessor *ModuleExpanderPP) override;
  37   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
  38   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
  39   void storeOptions(ClangTidyOptions::OptionMap &Opts) override;
  40
  41 private:
  42   const bool UseCXXStaticCastsInCppSources;
  43   const bool UseCXXHeadersInCppSources;
  44   const bool IgnoreConstantIntExpr;
  45   utils::IncludeInserter IncludeInserter;
  46 };
  47
  48 } // namespace clang::tidy::bugprone
  49
  50 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_IMPLICITWIDENINGOFMULTIPLICATIONRESULTCHECK_H