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