75 lines
2.0 KiB
C++
75 lines
2.0 KiB
C++
/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
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// test_singleton.cpp
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// (C) Copyright 2018 Robert Ramey - http://www.rrsd.com .
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// Use, modification and distribution is subject to the Boost Software
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// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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// should pass compilation and execution
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#include <iostream>
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#include <boost/serialization/singleton.hpp>
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#include "test_tools.hpp"
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static int i = 0;
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struct A {
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int m_id;
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A() : m_id(++i) {}
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~A(){
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// verify that objects are destroyed in sequence reverse of construction
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if(i-- != m_id) std::terminate();
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}
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};
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struct B {
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int m_id;
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B() : m_id(++i) {}
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~B(){
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// verify that objects are destroyed in sequence reverse of construction
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if(i-- != m_id) std::terminate();
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}
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};
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struct C {
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int m_id;
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C() : m_id(++i) {}
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~C(){
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// verify that objects are destroyed in sequence reverse of construction
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if(i-- != m_id) std::terminate();
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}
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};
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struct D {
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int m_id;
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D(){
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// verify that only one object is indeed created
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const C & c = boost::serialization::singleton<C>::get_const_instance();
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const C & c1 = boost::serialization::singleton<C>::get_const_instance();
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BOOST_CHECK_EQUAL(&c, &c1);
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// verify that objects are created in sequence of definition
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BOOST_CHECK_EQUAL(c.m_id, 1);
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const B & b = boost::serialization::singleton<B>::get_const_instance();
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BOOST_CHECK_EQUAL(b.m_id, 2);
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const A & a = boost::serialization::singleton<A>::get_const_instance();
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BOOST_CHECK_EQUAL(a.m_id, 3);
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std::cout << a.m_id << b.m_id << c.m_id << '\n';
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m_id = ++i;
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}
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~D(){
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// verify that objects are destroyed in sequence reverse of construction
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if(i-- != m_id) std::terminate();
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}
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};
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int test_main(int, char *[]){
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return 0;
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}
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// note: not a singleton
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D d;
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