| //===-- Core/CustomMatchers.h - Perf measurement helpers -----------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| /// |
| /// \file |
| /// \brief This file provides custom matchers to be used by different |
| /// transforms that requier the same matchers. |
| /// |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef CLANG_MODERNIZE_CUSTOMMATCHERS_H |
| #define CLANG_MODERNIZE_CUSTOMMATCHERS_H |
| |
| #include "clang/ASTMatchers/ASTMatchers.h" |
| |
| namespace clang { |
| namespace ast_matchers { |
| |
| /// \brief Matches declarations whose declaration context is the C++ standard |
| /// library namespace \c std. |
| /// |
| /// Note that inline namespaces are silently ignored during the lookup since |
| /// both libstdc++ and libc++ are known to use them for versioning purposes. |
| /// |
| /// Given |
| /// \code |
| /// namespace ns { |
| /// struct my_type {}; |
| /// using namespace std; |
| /// } |
| /// |
| /// using std::vector; |
| /// using ns::my_type; |
| /// using ns::list; |
| /// \endcode |
| /// usingDecl(hasAnyUsingShadowDecl(hasTargetDecl(isFromStdNamespace()))) |
| /// matches "using std::vector" and "using ns::list". |
| AST_MATCHER(Decl, isFromStdNamespace) { |
| const DeclContext *D = Node.getDeclContext(); |
| |
| while (D->isInlineNamespace()) |
| D = D->getParent(); |
| |
| if (!D->isNamespace() || !D->getParent()->isTranslationUnit()) |
| return false; |
| |
| const IdentifierInfo *Info = cast<NamespaceDecl>(D)->getIdentifier(); |
| |
| return Info && Info->isStr("std"); |
| } |
| } // namespace ast_matchers |
| } // namespace clang |
| |
| #endif // CLANG_MODERNIZE_CUSTOMMATCHERS_H |