std::ranges::join_view<V>:: iterator <Const>:: satisfy

From cppreference.com
Ranges library
Range adaptors
constexpr void satisfy ( ) ;
(since C++20)
( exposition only* )

Skips over empty inner ranges and initializes the underlying iterator inner_ .

Let the constant /*ref-is-glvalue*/ be std:: is_reference_v < ranges:: range_reference_t < Base >> .

The function body is equivalent to

auto update_inner = [this](const ranges::iterator_t<Base>& x) -> auto&&
{
    if constexpr (/*ref-is-glvalue*/)     // *x is a reference
        return *x;
    else
        return parent_->inner_./*emplace-deref*/(x);
};
 
for (; outer_ != ranges::end(parent_->base_); ++outer_)
{
    auto&& inner = update_inner(outer_);
    inner_ = ranges::begin(inner);
    if (inner_ != ranges::end(inner))
        return;
}
 
if constexpr (/*ref-is-glvalue*/)
    inner_ = InnerIter();

Parameters

(none)

Return value

(none)