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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_MODERNIZE_CONCATNESTEDNAMESPACESCHECK_H10#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MODERNIZE_CONCATNESTEDNAMESPACESCHECK_H11 12#include "../ClangTidyCheck.h"13#include "llvm/ADT/SmallString.h"14#include "llvm/ADT/SmallVector.h"15 16namespace clang::tidy::modernize {17 18using NamespaceName = llvm::SmallString<40>;19 20class NS : public llvm::SmallVector<const NamespaceDecl *, 6> {21public:22 std::optional<SourceRange>23 getCleanedNamespaceFrontRange(const SourceManager &SM,24 const LangOptions &LangOpts) const;25 SourceRange getReplacedNamespaceFrontRange() const;26 SourceRange getNamespaceBackRange(const SourceManager &SM,27 const LangOptions &LangOpts) const;28 SourceRange getDefaultNamespaceBackRange() const;29 void appendName(NamespaceName &Str) const;30 void appendCloseComment(NamespaceName &Str) const;31};32 33class ConcatNestedNamespacesCheck : public ClangTidyCheck {34public:35 ConcatNestedNamespacesCheck(StringRef Name, ClangTidyContext *Context)36 : ClangTidyCheck(Name, Context) {}37 bool unsupportedNamespace(const NamespaceDecl &ND, bool IsChild) const;38 bool singleNamedNamespaceChild(const NamespaceDecl &ND) const;39 bool isLanguageVersionSupported(const LangOptions &LangOpts) const override {40 return LangOpts.CPlusPlus17;41 }42 void registerMatchers(ast_matchers::MatchFinder *Finder) override;43 void check(const ast_matchers::MatchFinder::MatchResult &Result) override;44 45private:46 using NamespaceContextVec = llvm::SmallVector<NS, 6>;47 48 void reportDiagnostic(const SourceManager &SM, const LangOptions &LangOpts);49 NamespaceContextVec Namespaces;50};51} // namespace clang::tidy::modernize52 53#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MODERNIZE_CONCATNESTEDNAMESPACESCHECK_H54