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// Copyright 2014 Antony Polukhin.
//
// 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)
// For more information, see http://www.boost.org
#include <boost/function.hpp>
#include <boost/move/move.hpp>
#include <boost/core/lightweight_test.hpp>
#include <iostream>
#include <cstdlib>
#define BOOST_CHECK BOOST_TEST
class only_movable {
private:
BOOST_MOVABLE_BUT_NOT_COPYABLE(only_movable)
int value_;
bool moved_;
public:
only_movable(BOOST_RV_REF(only_movable) x)
: value_(x.value_)
, moved_(false)
{
x.moved_ = true;
}
only_movable& operator=(BOOST_RV_REF(only_movable) x) {
value_ = x.value_;
x.moved_ = true;
moved_ = false;
return *this;
}
explicit only_movable(int value = 0) : value_(value), moved_(false) {}
int get_value() const { return value_; }
bool is_moved() const { return moved_; }
};
int one(BOOST_RV_REF(only_movable) v) { return v.get_value(); }
only_movable two(BOOST_RV_REF(only_movable) t) {
only_movable t1 = boost::move(t);
return BOOST_MOVE_RET(only_movable, t1);
}
only_movable two_sum(BOOST_RV_REF(only_movable) t1, BOOST_RV_REF(only_movable) t2) {
only_movable ret(t1.get_value() + t2.get_value());
return BOOST_MOVE_RET(only_movable, ret);
}
struct sum_struct {
only_movable operator()(BOOST_RV_REF(only_movable) t1, BOOST_RV_REF(only_movable) t2) const {
only_movable ret(t1.get_value() + t2.get_value());
return BOOST_MOVE_RET(only_movable, ret);
}
};
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
int three(std::string&&) { return 1; }
std::string&& four(std::string&& s) { return boost::move(s); }
#endif
int main()
{
using boost::function;
function <int(BOOST_RV_REF(only_movable))> f1 = one;
only_movable om1(1);
BOOST_CHECK(f1(boost::move(om1)) == 1);
function <only_movable(BOOST_RV_REF(only_movable))> f2 = two;
only_movable om2(2);
only_movable om2_2 = f2(boost::move(om2));
BOOST_CHECK(om2_2.get_value() == 2);
BOOST_CHECK(om2.is_moved());
{
function <only_movable(BOOST_RV_REF(only_movable), BOOST_RV_REF(only_movable))> f2_sum = two_sum;
only_movable om1_sum(1), om2_sum(2);
only_movable om2_sum_2 = f2_sum(boost::move(om1_sum), boost::move(om2_sum));
BOOST_CHECK(om2_sum_2.get_value() == 3);
}
{
sum_struct s;
function <only_movable(BOOST_RV_REF(only_movable), BOOST_RV_REF(only_movable))> f2_sum = s;
only_movable om1_sum(1), om2_sum(2);
only_movable om2_sum_2 = f2_sum(boost::move(om1_sum), boost::move(om2_sum));
BOOST_CHECK(om2_sum_2.get_value() == 3);
}
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
function <int(std::string&&)> f3 = three;
function <std::string&& (std::string&& s)> f4 = four;
f3(std::string("Hello"));
BOOST_CHECK(f4(std::string("world")) == "world");
#endif
return boost::report_errors();
}
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