Ticket #10789: example-join.cpp

#include <iostream>
#include <vector>
#include <string>
#include <boost/range/join.hpp>

struct A
{
    A(int val = 99) : _val(val) {}
    int _val;
    friend std::ostream& operator << (std::ostream& os, const A& a) { os << a._val; return os; }
};

typedef std::vector< A > vect_t;

template < typename Range >
void print_range_clvalref(const Range& r, const std::string& tag)
{
    std::cout << "[c&] " << tag << ":";
    for (auto e : r)
    {
        std::cout << " " << e;
    }
    std::cout << std::endl;
}
template < typename Range >
void print_range_lvalref(Range& r, const std::string& tag)
{
    std::cout << "[&] " << tag << ":";
    for (auto e : r)
    {
        std::cout << " " << e;
    }
    std::cout << std::endl;
}
template < typename Range >
void print_range_crvalref(const Range&& r, const std::string& tag)
{
    std::cout << "[c&&] " << tag << ":";
    for (auto e : r)
    {
        std::cout << " " << e;
    }
    std::cout << std::endl;
}
template < typename Range >
void print_range_rvalref(Range&& r, const std::string& tag)
{
    std::cout << "[&&] " << tag << ":";
    for (auto e : r)
    {
        std::cout << " " << e;
    }
    std::cout << std::endl;
}


int main()
{
    vect_t v0(1, 12);
    vect_t v1(1, 34);
    std::cout << "join(v0, v1):";
    for (auto a : boost::join(v0, v1))
    {
        std::cout << " " << a;
    }
    std::cout << std::endl;
    std::cout << "join(v0, vect_t(1, 34)):";
    for (auto a : boost::join(v0, vect_t(1, 34)))
    {
        std::cout << " " << a;
    }
    std::cout << std::endl;
    print_range_clvalref(boost::join(v0, v1), std::string("boost::join(v0, v1)"));
    print_range_clvalref(boost::join(v0, vect_t(1, 34)), std::string("boost::join(v0, vect_t(1, 34))"));
    //print_range_lvalref(boost::join(v0, v1), std::string("boost::join(v0, v1)"));
    //print_range_lvalref(boost::join(v0, vect_t(1, 34)), std::string("boost::join(v0, vect_t(1, 34))"));
    print_range_crvalref(boost::join(v0, v1), std::string("boost::join(v0, v1)"));
    print_range_crvalref(boost::join(v0, vect_t(1, 34)), std::string("boost::join(v0, vect_t(1, 34))"));
    print_range_rvalref(boost::join(v0, v1), std::string("boost::join(v0, v1)"));
    print_range_rvalref(boost::join(v0, vect_t(1, 34)), std::string("boost::join(v0, vect_t(1, 34))"));
    auto rg0 = boost::join(v0, v1);
    auto rg1 = boost::join(v0, vect_t(1, 34));
    print_range_clvalref(rg0, "rg0");
    print_range_clvalref(rg1, "rg1");
    print_range_lvalref(rg0, "rg0");
    print_range_lvalref(rg1, "rg1");
    //print_range_crvalref(rg0, "rg0");
    //print_range_crvalref(rg1, "rg1");
    print_range_rvalref(rg0, "rg0");
    print_range_rvalref(rg1, "rg1");
    print_range_crvalref(std::move(rg0), "std::move(rg0)");
    print_range_crvalref(std::move(rg1), "std::move(rg1)");
    print_range_rvalref(std::move(rg0), "std::move(rg0)");
    print_range_rvalref(std::move(rg1), "std::move(rg1)");
}