//-----------------------------------------------------------------------------

 // boost-libs variant/libs/test/class_a.h header file

 // See http://www.boost.org for updates, documentation, and revision history.

 //-----------------------------------------------------------------------------

 //

 // Copyright (c) 2003

 // Eric Friedman, Itay Maman

 //

 // Distributed under the Boost Software License, Version 1.0. (See

 // accompanying file LICENSE_1_0.txt or copy at

 // http://www.boost.org/LICENSE_1_0.txt)

 #ifndef _CLASSA_H_INC_

 #define _CLASSA_H_INC_

 #include <algorithm> // for std::swap

 #include <sstream>

 #include <iostream>

 #include <assert.h>

 #include <iosfwd>

 struct class_a

 {

    ~class_a();

    class_a(int n = 5511);

    class_a(const class_a& other);

    class_a& operator=(const class_a& rhs);

    void swap(class_a& other);

    int get() const;

 private:

    int n_;

    class_a* self_p_;

 }; //Class_a

 std::ostream& operator<<(std::ostream& strm, const class_a& a);

 using namespace std;

 class_a::~class_a()

 {

    assert(self_p_ == this);

 }

 class_a::class_a(int n)

 {

    n_ = n;

    self_p_ = this;

 }

 class_a::class_a(const class_a& other)

 {

    n_ = other.n_;

    self_p_ = this;

 }

 class_a& class_a::operator=(const class_a& rhs)

 {

    class_a temp(rhs);

    swap(temp);

    return *this;

 }

 void class_a::swap(class_a& other)

 {

    std::swap(n_, other.n_);

 }

 int class_a::get() const

 {

    return n_;

 }

 std::ostream& operator<<(std::ostream& strm, const class_a& a)

 {

    return strm << "class_a(" << a.get() << ")";

 }

 #endif //_CLASSA_H_INC_