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add a generic way to get an yielder for a coroutine/generator

master
Daniel Kolesa 2017-03-11 14:51:34 +01:00
parent 64e699a2d2
commit 8c6e7d8bf7
1 changed files with 14 additions and 0 deletions
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14
ostd/coroutine.hh
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@ -567,6 +567,20 @@ inline void swap(generator<T> &a, generator<T> &b) {
a.swap(b);
}
namespace detail {
template<typename T>
struct yield_type_base {
using type = typename generator<T>::yield_type;
};
template<typename R, typename ...A>
struct yield_type_base<R(A...)> {
using type = typename coroutine<R(A...)>::yield_type;
};
}
template<typename T>
using yield_type = typename detail::yield_type_base<T>::type;
template<typename T>
struct generator_range: input_range<generator_range<T>> {
using range_category = input_range_tag;