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operator-(ranges::zip_transform_view::sentinel)

template< bool OtherConst >
  requires std::sized_sentinel_for</*zentinel*/<Const>, /*ziperator*/<OtherConst>>
friend constexpr ranges::range_difference_t</*maybe-const*/<OtherConst, /*InnerView*/>>
  operator-( const /*iterator*/<OtherConst>& x, const /*sentinel*/& y );

(1)

(since C++23)

template< bool OtherConst >
  requires std::sized_sentinel_for</*zentinel*/<Const>, /*ziperator*/<OtherConst>>
friend constexpr ranges::range_difference_t</*maybe-const*/<OtherConst, /*InnerView*/>>
  operator-( const /*sentinel*/& y, const /*iterator*/<OtherConst>& x );

(2)

(since C++23)

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

These function templates are not visible to ordinary unqualified or qualified lookup, and can only be found by argument-dependent lookup when zip_transform_view::sentinel is an associated class of the arguments.

Parameters

x	-	an iterator
y	-	a sentinel

Return value

Let inner_ denote the underlying iterator or sentinel respectively.

1) x.inner_ - y.inner_

2) y.inner_ - x.inner_

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