?? duo6.hpp
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/* The following code example is taken from the book * "C++ Templates - The Complete Guide" * by David Vandevoorde and Nicolai M. Josuttis, Addison-Wesley, 2002 * * (C) Copyright David Vandevoorde and Nicolai M. Josuttis 2002. * Permission to copy, use, modify, sell and distribute this software * is granted provided this copyright notice appears in all copies. * This software is provided "as is" without express or implied * warranty, and with no claim as to its suitability for any purpose. */// partial specialization for Duo<> with only one fieldtemplate <typename A>struct Duo<A,void> { public: typedef A T1; // type of first field typedef void T2; // type of second field enum { N = 1 }; // number of fields private: T1 value1; // value of first field public: // constructors Duo() : value1() { } Duo (T1 const & a) : value1(a) { } // field access T1& v1() { return value1; } T1 const& v1() const { return value1; } void v2() { } void v2() const { } //...};
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