// Copyright (c) 2011 Baidu, Inc. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. // Author: Ge,Jun (gejun@baidu.com) // Date: Mon. Nov 7 14:47:36 CST 2011 // Get name of a class. For example, class_name<T>() returns the name of T // (with namespace prefixes). This is useful in template classes. #ifndef BUTIL_CLASS_NAME_H #define BUTIL_CLASS_NAME_H #include <typeinfo> #include <string> // std::string namespace butil { std::string demangle(const char* name); namespace detail { template <typename T> struct ClassNameHelper { static std::string name; }; template <typename T> std::string ClassNameHelper<T>::name = demangle(typeid(T).name()); } // Get name of class |T|, in std::string. template <typename T> const std::string& class_name_str() { // We don't use static-variable-inside-function because before C++11 // local static variable is not guaranteed to be thread-safe. return detail::ClassNameHelper<T>::name; } // Get name of class |T|, in const char*. // Address of returned name never changes. template <typename T> const char* class_name() { return class_name_str<T>().c_str(); } // Get typename of |obj|, in std::string template <typename T> std::string class_name_str(T const& obj) { return demangle(typeid(obj).name()); } } // namespace butil #endif // BUTIL_CLASS_NAME_H