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
14namespace 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.
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::misc
51
52#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MISC_THROW_BY_VALUE_CATCH_BY_REFERENCE_H
53

source code of clang-tools-extra/clang-tidy/misc/ThrowByValueCatchByReferenceCheck.h