clang-tidy/misc/UnusedAliasDeclsCheck.h

0001 //===--- UnusedAliasDeclsCheck.h - clang-tidy--------------------*- C++ -*-===//
0002 //
0003 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0004 // See https://llvm.org/LICENSE.txt for license information.
0005 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0006 //
0007 //===----------------------------------------------------------------------===//
0008
0009 #ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MISC_UNUSED_ALIAS_DECLS_H
0010 #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MISC_UNUSED_ALIAS_DECLS_H
0011
0012 #include "../ClangTidyCheck.h"
0013 #include "llvm/ADT/DenseMap.h"
0014
0015 namespace clang::tidy::misc {
0016
0017 /// Finds unused namespace alias declarations.
0018 class UnusedAliasDeclsCheck : public ClangTidyCheck {
0019 public:
0020   UnusedAliasDeclsCheck(StringRef Name, ClangTidyContext *Context)
0021       : ClangTidyCheck(Name, Context) {}
0022   bool isLanguageVersionSupported(const LangOptions &LangOpts) const override {
0023     return LangOpts.CPlusPlus11;
0024   }
0025   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
0026   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
0027   void onEndOfTranslationUnit() override;
0028
0029 private:
0030   llvm::DenseMap<const NamedDecl *, CharSourceRange> FoundDecls;
0031 };
0032
0033 } // namespace clang::tidy::misc
0034
0035 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MISC_UNUSED_ALIAS_DECLS_H