2003-09-30 18:37:50 +00:00
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//===- Support/TypeInfo.h - Support class for type_info objects -*- C++ -*-===//
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2002-07-23 17:56:53 +00:00
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//
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// This class makes std::type_info objects behave like first class objects that
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// can be put in maps and hashtables. This code is based off of code in the
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// Loki C++ library from the Modern C++ Design book.
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//
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//===----------------------------------------------------------------------===//
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2003-06-17 00:35:55 +00:00
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#ifndef SUPPORT_TYPEINFO_H
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#define SUPPORT_TYPEINFO_H
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2002-07-23 17:56:53 +00:00
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#include <typeinfo>
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struct TypeInfo {
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TypeInfo() { // needed for containers
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struct Nil {}; // Anonymous class distinct from all others...
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Info = &typeid(Nil);
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}
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TypeInfo(const std::type_info &ti) : Info(&ti) { // non-explicit
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}
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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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return *Info;
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}
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// Compatibility functions
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bool before(const TypeInfo &rhs) const {
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return Info->before(*rhs.Info);
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}
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const char *getClassName() const {
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return Info->name();
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}
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private:
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const std::type_info *Info;
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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
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