| //===--- ForwardDeclarationNamespaceCheck.h - clang-tidy --------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_FORWARDDECLARATIONNAMESPACECHECK_H |
| #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_FORWARDDECLARATIONNAMESPACECHECK_H |
| |
| #include "../ClangTidyCheck.h" |
| #include "llvm/ADT/SmallPtrSet.h" |
| #include <set> |
| #include <vector> |
| |
| namespace clang::tidy::bugprone { |
| |
| /// Checks if an unused forward declaration is in a wrong namespace. |
| /// |
| /// The check inspects all unused forward declarations and checks if there is |
| /// any declaration/definition with the same name, which could indicate |
| /// that the forward declaration is potentially in a wrong namespace. |
| /// |
| /// \code |
| /// namespace na { struct A; } |
| /// namespace nb { struct A {} }; |
| /// nb::A a; |
| /// // warning : no definition found for 'A', but a definition with the same |
| /// name 'A' found in another namespace 'nb::' |
| /// \endcode |
| /// |
| /// This check can only generate warnings, but it can't suggest fixes at this |
| /// point. |
| /// |
| /// For the user-facing documentation see: |
| /// http://clang.llvm.org/extra/clang-tidy/checks/bugprone/forward-declaration-namespace.html |
| class ForwardDeclarationNamespaceCheck : public ClangTidyCheck { |
| public: |
| ForwardDeclarationNamespaceCheck(StringRef Name, ClangTidyContext *Context) |
| : ClangTidyCheck(Name, Context) {} |
| void registerMatchers(ast_matchers::MatchFinder *Finder) override; |
| void check(const ast_matchers::MatchFinder::MatchResult &Result) override; |
| void onEndOfTranslationUnit() override; |
| |
| private: |
| llvm::StringMap<std::vector<const CXXRecordDecl *>> DeclNameToDefinitions; |
| llvm::StringMap<std::vector<const CXXRecordDecl *>> DeclNameToDeclarations; |
| llvm::SmallPtrSet<const Type *, 16> FriendTypes; |
| }; |
| |
| } // namespace clang::tidy::bugprone |
| |
| #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_FORWARDDECLARATIONNAMESPACECHECK_H |