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