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gezelter |
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//////////////////////////////////////////////////////////////////////////////// |
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// The Loki Library |
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// Copyright (c) 2001 by Andrei Alexandrescu |
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// This code accompanies the book: |
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// Alexandrescu, Andrei. "Modern C++ Design: Generic Programming and Design |
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// Patterns Applied". Copyright (c) 2001. Addison-Wesley. |
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// Permission to use, copy, modify, distribute and sell this software for any |
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// purpose is hereby granted without fee, provided that the above copyright |
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// notice appear in all copies and that both that copyright notice and this |
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// permission notice appear in supporting documentation. |
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// The author or Addison-Wesley Longman make no representations about the |
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// suitability of this software for any purpose. It is provided "as is" |
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// without express or implied warranty. |
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//////////////////////////////////////////////////////////////////////////////// |
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#ifndef _TYPE_INFO_H_ |
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#define _TYPE_INFO_H_ |
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#include <typeinfo> |
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using namespace std; |
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class TypeInfo |
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{ |
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public: |
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// Constructors |
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TypeInfo(); // needed for containers |
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TypeInfo(const std::type_info&); // non-explicit |
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// Access for the wrapped std::type_info |
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const std::type_info& Get() const; |
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// Compatibility functions |
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bool before(const TypeInfo& rhs) const; |
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const char* name() const; |
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private: |
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const std::type_info* pInfo_; |
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}; |
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// Implementation |
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inline TypeInfo::TypeInfo(){ |
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class Nil {}; |
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pInfo_ = &typeid(Nil); |
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} |
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inline TypeInfo::TypeInfo(const std::type_info& ti): pInfo_(&ti) |
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{ } |
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inline bool TypeInfo::before(const TypeInfo& rhs) const{ |
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return pInfo_->before(*rhs.pInfo_); |
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} |
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inline const std::type_info& TypeInfo::Get() const{ |
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return *pInfo_; |
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} |
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inline const char* TypeInfo::name() const{ |
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return pInfo_->name(); |
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} |
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// Comparison operators |
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inline bool operator==(const TypeInfo& lhs, const TypeInfo& rhs){ |
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return lhs.Get() == rhs.Get(); |
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} |
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inline bool operator<(const TypeInfo& lhs, const TypeInfo& rhs){ |
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return lhs.before(rhs); |
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} |
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inline bool operator!=(const TypeInfo& lhs, const TypeInfo& rhs){ |
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return !(lhs == rhs); |
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} |
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inline bool operator>(const TypeInfo& lhs, const TypeInfo& rhs){ |
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return rhs < lhs; |
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} |
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inline bool operator<=(const TypeInfo& lhs, const TypeInfo& rhs){ |
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return !(lhs > rhs); |
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} |
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inline bool operator>=(const TypeInfo& lhs, const TypeInfo& rhs){ |
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return !(lhs < rhs); |
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} |
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#endif //iindef _TYPE_INFO_H_ |
