| // { dg-options "-D_GLIBCXX_CONCEPT_CHECKS" } |
| // { dg-do run { target c++11 } } |
| |
| #include <iterator> |
| #include <utility> |
| #include <sstream> |
| #include <string> |
| #include <testsuite_hooks.h> |
| |
| template<typename Distance, typename InputRange> |
| std::pair<std::istream_iterator<char>, std::istream_iterator<char>> |
| drop(Distance n, InputRange& rng) |
| { |
| return std::make_pair(std::next(std::istream_iterator<char>(rng), n), |
| std::istream_iterator<char>() |
| ); |
| } |
| |
| int main() |
| { |
| std::stringstream x("let let there be rock"); |
| x << std::noskipws; |
| auto y = drop(4, x); |
| std::string z(y.first, y.second); |
| VERIFY(z == "let there be rock"); |
| } |
