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Overloading OSTREAM
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#include <cassert> | |
#include <functional> | |
#include <iostream> | |
#include <vector> | |
std::vector<int> V; | |
template <typename Container1, typename Container2> | |
std::ostream& | |
operator<<(std::ostream& ostr, const std::pair<Container1&, Container2&> data) | |
{ | |
auto head1 = data.first.begin(); | |
auto tail1 = data.first.end(); | |
auto head2 = data.second.begin(); | |
auto tail2 = data.second.end(); | |
assert(std::distance(head1, tail1) == | |
std::distance(head2, tail2)); | |
size_t distance = std::distance(head1, tail1); | |
while (head1 != tail1 | |
&& head2 != tail2) { | |
ostr << *head1 << ", " << *head2 << "\n"; | |
++head1; | |
++head2; | |
} | |
return ostr; | |
} | |
template <typename Container1, typename Container2> | |
std::ostream& | |
operator<<(std::ostream& ostr, const std::pair<Container1, Container2> data) | |
{ | |
auto head1 = data.first.begin(); | |
auto tail1 = data.first.end(); | |
auto head2 = data.second.begin(); | |
auto tail2 = data.second.end(); | |
assert(std::distance(head1, tail1) == | |
std::distance(head2, tail2)); | |
size_t distance = std::distance(head1, tail1); | |
while (head1 != tail1 | |
&& head2 != tail2) { | |
ostr << *head1 << ", " << *head2 << "\n"; | |
++head1; | |
++head2; | |
} | |
return ostr; | |
} | |
int | |
main() | |
{ | |
V.push_back(0); | |
V.push_back(2); | |
V.push_back(1); | |
std::cout << std::make_pair(std::ref(V), std::ref(V)); | |
std::cout << std::make_pair(V, V); | |
} |
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