operator- (ranges::transform_view:: sentinel )

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C++
Ranges library
Range adaptors
std::ranges::transform_view
Member functions
Deduction guides
Iterator
Sentinel
operator- (transform_view:: iterator ,transform_view:: sentinel )
friend constexpr ranges:: range_difference_t < Base >

operator - ( const /*iterator*/ < Const > & x, const /*sentinel*/ & y )
requires std:: sized_sentinel_for < ranges:: sentinel_t < Base > ,

ranges:: iterator_t < Base >> ;
(1) (since C++20)
friend constexpr ranges:: range_difference_t < Base >

operator - ( const /*sentinel*/ & y, const /*iterator*/ < Const > & x )
requires std:: sized_sentinel_for < ranges:: sentinel_t < Base > ,

ranges:: iterator_t < Base >> ;
(2) (since C++20)

Computes the distance between the underlying iterator of x and the underlying sentinel of y .

These functions are not visible to ordinary unqualified or qualified lookup , and can only be found by argument-dependent lookup when transform_view:: sentinel <Const> is an associated class of the arguments.

Parameters

x - an iterator
y - a sentinel

Return value

Let current_ denote the underlying iterator, end_ denote the underlying sentinel.

1) x. current_ - y. end_
2) y. end_ - x. current_
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