ImplicitWideningOfMultiplicationResultCheck.h

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//===----------------------------------------------------------------------===//
//
// 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_BUGPRONE_IMPLICITWIDENINGOFMULTIPLICATIONRESULTCHECK_H
#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_IMPLICITWIDENINGOFMULTIPLICATIONRESULTCHECK_H
 
#include "../ClangTidyCheck.h"
#include "../utils/IncludeInserter.h"
#include <optional>
 
namespace clang::tidy::bugprone {
 
/// Diagnoses instances of an implicit widening of multiplication result.
///
/// For the user-facing documentation see:
/// https://clang.llvm.org/extra/clang-tidy/checks/bugprone/implicit-widening-of-multiplication-result.html
class ImplicitWideningOfMultiplicationResultCheck : public ClangTidyCheck {
  const ast_matchers::MatchFinder::MatchResult *Result;
  bool ShouldUseCXXStaticCast;
  bool ShouldUseCXXHeader;
 
  std::optional<FixItHint> includeStddefHeader(SourceLocation File);
 
  void handleImplicitCastExpr(const ImplicitCastExpr *ICE);
  void handlePointerOffsetting(const Expr *E);
 
public:
  ImplicitWideningOfMultiplicationResultCheck(StringRef Name,
                                              ClangTidyContext *Context);
  void registerPPCallbacks(const SourceManager &SM, Preprocessor *PP,
                           Preprocessor *ModuleExpanderPP) override;
  void registerMatchers(ast_matchers::MatchFinder *Finder) override;
  void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
  void storeOptions(ClangTidyOptions::OptionMap &Opts) override;
 
private:
  const bool UseCXXStaticCastsInCppSources;
  const bool UseCXXHeadersInCppSources;
  const bool IgnoreConstantIntExpr;
  utils::IncludeInserter IncludeInserter;
};
 
} // namespace clang::tidy::bugprone
 
#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_IMPLICITWIDENINGOFMULTIPLICATIONRESULTCHECK_H