Yi Kong | 878f994 | 2023-12-13 12:55:04 +0900 | [diff] [blame^] | 1 | //===--- ThrowByValueCatchByReferenceCheck.h - clang-tidy--------*- 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_MISC_THROW_BY_VALUE_CATCH_BY_REFERENCE_H |
| 10 | #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MISC_THROW_BY_VALUE_CATCH_BY_REFERENCE_H |
| 11 | |
| 12 | #include "../ClangTidyCheck.h" |
| 13 | |
| 14 | namespace clang::tidy::misc { |
| 15 | |
| 16 | ///checks for locations that do not throw by value |
| 17 | // or catch by reference. |
| 18 | // The check is C++ only. It checks that all throw locations |
| 19 | // throw by value and not by pointer. Additionally it |
| 20 | // contains an option ("CheckThrowTemporaries", default value "true") that |
| 21 | // checks that thrown objects are anonymous temporaries. It is also |
| 22 | // acceptable for this check to throw string literals. |
| 23 | // This test checks that exceptions are caught by reference |
| 24 | // and not by value or pointer. It will not warn when catching |
| 25 | // pointer to char, wchar_t, char16_t or char32_t. This is |
| 26 | // due to not warning on throwing string literals. |
| 27 | class ThrowByValueCatchByReferenceCheck : public ClangTidyCheck { |
| 28 | public: |
| 29 | ThrowByValueCatchByReferenceCheck(StringRef Name, ClangTidyContext *Context); |
| 30 | bool isLanguageVersionSupported(const LangOptions &LangOpts) const override { |
| 31 | return LangOpts.CPlusPlus; |
| 32 | } |
| 33 | void storeOptions(ClangTidyOptions::OptionMap &Opts) override; |
| 34 | void registerMatchers(ast_matchers::MatchFinder *Finder) override; |
| 35 | void check(const ast_matchers::MatchFinder::MatchResult &Result) override; |
| 36 | |
| 37 | private: |
| 38 | void diagnoseThrowLocations(const CXXThrowExpr *ThrowExpr); |
| 39 | void diagnoseCatchLocations(const CXXCatchStmt *CatchStmt, |
| 40 | ASTContext &Context); |
| 41 | bool isFunctionParameter(const DeclRefExpr *DeclRefExpr); |
| 42 | bool isCatchVariable(const DeclRefExpr *DeclRefExpr); |
| 43 | bool isFunctionOrCatchVar(const DeclRefExpr *DeclRefExpr); |
| 44 | const bool CheckAnonymousTemporaries; |
| 45 | const bool WarnOnLargeObject; |
| 46 | const uint64_t MaxSizeOptions; // The raw value read from the options. |
| 47 | uint64_t MaxSize; // No `const` because we have to set it in two steps. |
| 48 | }; |
| 49 | |
| 50 | } // namespace clang::tidy::misc |
| 51 | |
| 52 | #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MISC_THROW_BY_VALUE_CATCH_BY_REFERENCE_H |