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std::ranges::lazy_split_view<V,Pattern>:: begin

From cppreference.net
Ranges library
Range adaptors
constexpr auto begin ( ) ;
(1) (since C++20)
constexpr auto begin ( ) const
requires ranges:: forward_range < V > && ranges:: forward_range < const V > ;
(2) (since C++20)

Returns an outer_iterator to the first element of the lazy_split_view .

Let base_ be the underlying view and current_ be the underlying caching object (may not be present).

1) Equivalent to
constexpr auto begin()
{
    if constexpr (ranges::forward_range<V>)
        return /*outer_iterator*/</*simple_view*/<V>>{*this, ranges::begin(base_)};
    else
    {
        current_ = ranges::begin(base_);
        return /*outer_iterator*/<false>{*this};
    }
}
2) Equivalent to return /*outer_iterator*/ < true > { * this, ranges:: begin ( base_ ) } ; .

Return value

outer_iterator to the first element.

Example

See also

returns an iterator or a sentinel to the end
(public member function)
returns an iterator to the beginning of a range
(customization point object)