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// 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