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Make recursive_generator<T> satisfy the Range concept.

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Fix recursive_generator<T&&> to have a 'reference' type of T&&.
This commit is contained in:
Lewis Baker 2019-01-18 22:28:18 -08:00
parent 8e9db4c48a
commit 1f3366ddb6
1 changed files with 15 additions and 6 deletions
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21
include/cppcoro/recursive_generator.hpp
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@ -170,7 +170,7 @@ namespace cppcoro
std::experimental::coroutine_handle<promise_type>::from_promise(*this).resume();
}
T* m_value;
std::add_pointer_t<T> m_value;
std::exception_ptr m_exception;
promise_type* m_root;
@ -229,12 +229,16 @@ namespace cppcoro
using iterator_category = std::input_iterator_tag;
// What type should we use for counting elements of a potentially infinite sequence?
using difference_type = std::size_t;
using difference_type = std::ptrdiff_t;
using value_type = std::remove_reference_t<T>;
using reference = value_type&;
using pointer = value_type*;
using reference = std::conditional_t<std::is_reference_v<T>, T, T&>;
using pointer = std::add_pointer_t<T>;
iterator(promise_type* promise) noexcept
iterator() noexcept
: m_promise(nullptr)
{}
explicit iterator(promise_type* promise) noexcept
: m_promise(promise)
{}
@ -264,10 +268,15 @@ namespace cppcoro
return *this;
}
void operator++(int)
{
(void)operator++();
}
reference operator*() const noexcept
{
assert(m_promise != nullptr);
return m_promise->value();
return static_cast<reference>(m_promise->value());
}
pointer operator->() const noexcept