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 
16 namespace clang {
17 namespace tidy {
18 namespace modernize {
19 
20 class ConcatNestedNamespacesCheck : public ClangTidyCheck {
21 public:
ConcatNestedNamespacesCheck(StringRef Name,ClangTidyContext * Context)22   ConcatNestedNamespacesCheck(StringRef Name, ClangTidyContext *Context)
23       : ClangTidyCheck(Name, Context) {}
isLanguageVersionSupported(const LangOptions & LangOpts)24   bool isLanguageVersionSupported(const LangOptions &LangOpts) const override {
25     return LangOpts.CPlusPlus17;
26   }
27   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
28   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
29 
30 private:
31   using NamespaceContextVec = llvm::SmallVector<const NamespaceDecl *, 6>;
32   using NamespaceString = llvm::SmallString<40>;
33 
34   void reportDiagnostic(const SourceRange &FrontReplacement,
35                         const SourceRange &BackReplacement);
36   NamespaceString concatNamespaces();
37   NamespaceContextVec Namespaces;
38 };
39 } // namespace modernize
40 } // namespace tidy
41 } // namespace clang
42 
43 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MODERNIZE_CONCATNESTEDNAMESPACESCHECK_H
44