cppdraft_translate/cppdraft/counted/iter/cmp.md

[counted.iter.cmp]

24 Iterators library [iterators]

24.5 Iterator adaptors [predef.iterators]

24.5.7 Counted iterators [iterators.counted]

24.5.7.6 Comparisons [counted.iter.cmp]

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template<[common_with](concept.common#concept:common_with "18.4.6 Concept common_­with [concept.common]")<I> I2> friend constexpr bool operator==( const counted_iterator& x, const counted_iterator<I2>& y);

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Preconditions: x and y refer to elements of the same sequence ([counted.iterator]).

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Effects: Equivalent to: return x.length == y.length;

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friend constexpr bool operator==( const counted_iterator& x, default_sentinel_t) noexcept;

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Effects: Equivalent to: return x.length == 0;

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template<[common_with](concept.common#concept:common_with "18.4.6 Concept common_­with [concept.common]")<I> I2> friend constexpr strong_ordering operator<=>( const counted_iterator& x, const counted_iterator<I2>& y);

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Preconditions: x and y refer to elements of the same sequence ([counted.iterator]).

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Effects: Equivalent to: return y.length <=> x.length;

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[Note 1:

The argument order in the Effects: element is reversed because length counts down, not up.

— end note]