| //===--- UnusedUsingDeclsCheck.h - clang-tidy--------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MISC_UNUSED_USING_DECLS_H |
| #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MISC_UNUSED_USING_DECLS_H |
| |
| #include "../ClangTidy.h" |
| #include "llvm/ADT/SmallPtrSet.h" |
| #include <vector> |
| |
| namespace clang { |
| namespace tidy { |
| namespace misc { |
| |
| /// Finds unused using declarations. |
| /// |
| /// For the user-facing documentation see: |
| /// http://clang.llvm.org/extra/clang-tidy/checks/misc-unused-using-decls.html |
| class UnusedUsingDeclsCheck : public ClangTidyCheck { |
| public: |
| UnusedUsingDeclsCheck(StringRef Name, ClangTidyContext *Context) |
| : ClangTidyCheck(Name, Context) {} |
| void registerMatchers(ast_matchers::MatchFinder *Finder) override; |
| void check(const ast_matchers::MatchFinder::MatchResult &Result) override; |
| void onEndOfTranslationUnit() override; |
| |
| private: |
| void removeFromFoundDecls(const Decl *D); |
| |
| struct UsingDeclContext { |
| explicit UsingDeclContext(const UsingDecl *FoundUsingDecl) |
| : FoundUsingDecl(FoundUsingDecl), IsUsed(false) {} |
| // A set saves all UsingShadowDecls introduced by a UsingDecl. A UsingDecl |
| // can introduce multiple UsingShadowDecls in some cases (such as |
| // overloaded functions). |
| llvm::SmallPtrSet<const Decl *, 4> UsingTargetDecls; |
| // The original UsingDecl. |
| const UsingDecl *FoundUsingDecl; |
| // The source range of the UsingDecl. |
| CharSourceRange UsingDeclRange; |
| // Whether the UsingDecl is used. |
| bool IsUsed; |
| }; |
| |
| std::vector<UsingDeclContext> Contexts; |
| }; |
| |
| } // namespace misc |
| } // namespace tidy |
| } // namespace clang |
| |
| #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MISC_UNUSED_USING_DECLS_H |