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   utils::IncludeInserter IncludeInserter;
45 };
46 
47 } // namespace clang::tidy::bugprone
48 
49 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_IMPLICITWIDENINGOFMULTIPLICATIONRESULTCHECK_H
50