struct /*sentinel*/; | (since C++20) |
The return type of iota_view::end, used when the iota_view is bounded (i.e. Bound is not std::unreachable_sentinel_t) and Bound and W are not the same type.
The name of this class (shown here as /*sentinel*/) is unspecified.
Typical implementation holds one data member of type Bound (shown here as bound_), typically a number.
/*sentinel*/() = default; | (1) | (since C++20) |
constexpr explicit /*sentinel*/( Bound bound ); | (2) | (since C++20) |
bound_ via its default member initializer (= Bound()).bound_ with bound. In the following descriptions, value_ is an exposition-only data member of iterator from which its operator* copies.
friend constexpr bool operator==( const /*iterator*/& x,
const /*sentinel*/& y );
| (since C++20) |
Equivalent to: return x.value_ == y.bound_;.
The != operator is synthesized from operator==.
This function is not visible to ordinary unqualified or qualified lookup, and can only be found by argument-dependent lookup when sentinel is an associated class of the arguments.
friend constexpr std::iter_difference_t<W>
operator-(const /*iterator*/& x, const /*sentinel*/& y)
requires std::sized_sentinel_for<Bound, W>;
| (1) | (since C++20) |
friend constexpr std::iter_difference_t<W>
operator-(const /*sentinel*/& x, const /*iterator*/& y)
requires std::sized_sentinel_for<Bound, W>;
| (2) | (since C++20) |
return x.value_ - y.bound_;.return -(y.value_ - x.bound_);.These functions are not visible to ordinary unqualified or qualified lookup, and can only be found by argument-dependent lookup when sentinel is an associated class of the arguments.
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