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 
15 namespace clang {
16 namespace tidy {
17 namespace bugprone {
18 
19 /// Diagnoses instances of an implicit widening of multiplication result.
20 ///
21 /// For the user-facing documentation see:
22 /// http://clang.llvm.org/extra/clang-tidy/checks/bugprone/implicit-widening-of-multiplication-result.html
23 class ImplicitWideningOfMultiplicationResultCheck : public ClangTidyCheck {
24   const ast_matchers::MatchFinder::MatchResult *Result;
25   bool ShouldUseCXXStaticCast;
26   bool ShouldUseCXXHeader;
27 
28   llvm::Optional<FixItHint> includeStddefHeader(SourceLocation File);
29 
30   void handleImplicitCastExpr(const ImplicitCastExpr *ICE);
31   void handlePointerOffsetting(const Expr *E);
32 
33 public:
34   ImplicitWideningOfMultiplicationResultCheck(StringRef Name,
35                                               ClangTidyContext *Context);
36   void registerPPCallbacks(const SourceManager &SM, Preprocessor *PP,
37                            Preprocessor *ModuleExpanderPP) override;
38   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
39   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
40   void storeOptions(ClangTidyOptions::OptionMap &Opts) override;
41 
42 private:
43   const bool UseCXXStaticCastsInCppSources;
44   const bool UseCXXHeadersInCppSources;
45   utils::IncludeInserter IncludeInserter;
46 };
47 
48 } // namespace bugprone
49 } // namespace tidy
50 } // namespace clang
51 
52 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_IMPLICITWIDENINGOFMULTIPLICATIONRESULTCHECK_H
53