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extern/ustl/1.5/upair.h

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+// This file is part of the uSTL library, an STL implementation.
+//
+// Copyright (c) 2005 by Mike Sharov <msharov@users.sourceforge.net>
+// This file is free software, distributed under the MIT License.
+
+#ifndef UPAIR_H_7DC08F1B7FECF8AE6856D84C3B617A75
+#define UPAIR_H_7DC08F1B7FECF8AE6856D84C3B617A75
+
+#include "utypes.h"
+
+namespace ustl {
+
+/// \class pair upair.h ustl.h
+/// \ingroup AssociativeContainers
+///
+/// \brief Container for two values.
+///
+template <typename T1, typename T2>
+class pair {
+public:
+    typedef T1		first_type;
+    typedef T2		second_type;
+public:
+    /// Default constructor.
+    inline pair (void)				: first (T1()), second (T2()) {}
+    /// Initializes members with \p a, and \p b.
+    inline pair (const T1& a, const T2& b)	: first (a), second (b) {}
+    inline pair&	operator= (const pair<T1, T2>& p2) { first = p2.first; second = p2.second; return (*this); }
+    template <typename T3, typename T4>
+    inline pair&	operator= (const pair<T3, T4>& p2) { first = p2.first; second = p2.second; return (*this); }
+public:
+    first_type		first;
+    second_type		second;
+};
+
+/// Compares both values of \p p1 to those of \p p2.
+template <typename T1, typename T2>
+inline bool operator== (const pair<T1,T2>& p1, const pair<T1,T2>& p2)
+{
+    return (p1.first == p2.first && p1.second == p2.second);
+}
+
+/// Compares both values of \p p1 to those of \p p2.
+template <typename T1, typename T2>
+bool operator< (const pair<T1,T2>& p1, const pair<T1,T2>& p2)
+{
+    return (p1.first < p2.first || (p1.first == p2.first && p1.second < p2.second));
+}
+
+/// Returns a pair object with (a,b)
+template <typename T1, typename T2>
+inline pair<T1,T2> make_pair (const T1& a, const T2& b)
+{
+    return (pair<T1,T2> (a, b));
+}
+
+} // namespace ustl
+
+#endif