clang-tools-extra/clang-tidy/misc/UnusedAliasDeclsCheck.h

   1 //===--- UnusedAliasDeclsCheck.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_MISC_UNUSED_ALIAS_DECLS_H
  10 #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MISC_UNUSED_ALIAS_DECLS_H
  11
  12 #include "../ClangTidyCheck.h"
  13 #include "llvm/ADT/DenseMap.h"
  14
  15 namespace clang::tidy::misc {
  16
  17 /// Finds unused namespace alias declarations.
  18 class UnusedAliasDeclsCheck : public ClangTidyCheck {
  19 public:
  20   UnusedAliasDeclsCheck(StringRef Name, ClangTidyContext *Context)
  21       : ClangTidyCheck(Name, Context) {}
  22   bool isLanguageVersionSupported(const LangOptions &LangOpts) const override {
  23     return LangOpts.CPlusPlus11;
  24   }
  25   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
  26   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
  27   void onEndOfTranslationUnit() override;
  28
  29 private:
  30   llvm::DenseMap<const NamedDecl *, CharSourceRange> FoundDecls;
  31 };
  32
  33 } // namespace clang::tidy::misc
  34
  35 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MISC_UNUSED_ALIAS_DECLS_H