operator-(std::basic_const_iterator)

template< std::sized_sentinel_for<Iter> S >
constexpr difference_type operator-( const S& s ) const;

(1)

(since C++23)

template< /*not-a-const-iterator*/ S >
    requires std::sized_sentinel_for<S, Iter>
friend constexpr difference_type 
    operator-( const S& s, const basic_const_iterator& i );

(2)

(since C++23)

Returns the distance between basic_const_iterator and its sentinel.

S satisfies the exposition-only concept /*not-a-const-iterator*/ if and only if it's not a specialization of basic_const_iterator.

Parameters

i, s

iterator and sentinel to compute the difference of

Return value

1) base() - s

2) s - i.base()

Example

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