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1//===----------------------------------------------------------------------===//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-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MISC_THROWBYVALUECATCHBYREFERENCECHECK_H10#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MISC_THROWBYVALUECATCHBYREFERENCECHECK_H11 12#include "../ClangTidyCheck.h"13 14namespace clang::tidy::misc {15 16/// Checks for locations that do not throw by value17// or catch by reference.18// The check is C++ only. It checks that all throw locations19// throw by value and not by pointer. Additionally it20// contains an option ("CheckThrowTemporaries", default value "true") that21// checks that thrown objects are anonymous temporaries. It is also22// acceptable for this check to throw string literals.23// This test checks that exceptions are caught by reference24// and not by value or pointer. It will not warn when catching25// pointer to char, wchar_t, char16_t or char32_t. This is26// due to not warning on throwing string literals.27class ThrowByValueCatchByReferenceCheck : public ClangTidyCheck {28public: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 37private: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::misc51 52#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MISC_THROWBYVALUECATCHBYREFERENCECHECK_H53