1//===--- ConcatNestedNamespacesCheck.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_MODERNIZE_CONCATNESTEDNAMESPACESCHECK_H
10#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MODERNIZE_CONCATNESTEDNAMESPACESCHECK_H
11
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::modernize
52
53#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MODERNIZE_CONCATNESTEDNAMESPACESCHECK_H
54

source code of clang-tools-extra/clang-tidy/modernize/ConcatNestedNamespacesCheck.h