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Showing content from https://timsong-cpp.github.io/cppwp/ranges-ts/counted.iter.op.comp below:

[counted.iter.op.comp]

9.7.6.2.13 counted_iterator comparisons [counted.iter.op.comp]

template <class I1, class I2> requires Common<I1, I2> constexpr bool operator==( const counted_iterator<I1>& x, const counted_iterator<I2>& y);

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

constexpr bool operator==( const counted_iterator<auto>& x, default_sentinel); constexpr bool operator==( default_sentinel, const counted_iterator<auto>& x);

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

template <class I1, class I2> requires Common<I1, I2> constexpr bool operator!=( const counted_iterator<I1>& x, const counted_iterator<I2>& y); constexpr bool operator!=( const counted_iterator<auto>& x, default_sentinel); constexpr bool operator!=( default_sentinel, const counted_iterator<auto>& x);

Requires: For the first overload, x and y shall refer to elements of the same sequence ([iterators.counted]).

Effects: Equivalent to: return !(x == y);

template <class I1, class I2> requires Common<I1, I2> constexpr bool operator<( const counted_iterator<I1>& x, const counted_iterator<I2>& y);

Effects: Equivalent to: return y.cnt < x.cnt;

Note: The argument order in the Effects element is reversed because cnt counts down, not up.  — end note ]

template <class I1, class I2> requires Common<I1, I2> constexpr bool operator<=( const counted_iterator<I1>& x, const counted_iterator<I2>& y);

Effects: Equivalent to: return !(y < x);

template <class I1, class I2> requires Common<I1, I2> constexpr bool operator>( const counted_iterator<I1>& x, const counted_iterator<I2>& y);

Effects: Equivalent to: return y < x;

template <class I1, class I2> requires Common<I1, I2> constexpr bool operator>=( const counted_iterator<I1>& x, const counted_iterator<I2>& y);

Effects: Equivalent to: return !(x < y);


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