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std::ranges::elements_view<V,N>:: reserve_hint

From cppreference.net
Ranges library
Range adaptors
constexpr auto reserve_hint ( )
requires ranges :: approximately_sized_range < V >
(1) (since C++26)
constexpr auto reserve_hint ( ) const
requires ranges :: approximately_sized_range < const V >
(2) (since C++26)

Equivalent to return ranges :: reserve_hint ( base_  ) ;

Contents

Return value

The approximate size of the resulting range.

Notes

Feature-test macro Value Std Feature
__cpp_lib_ranges_reserve_hint 202502L (C++26) ranges::approximately_sized_range and reserve_hint (1,2)

Example

See also

returns the number of elements, provided only if the underlying (adapted) range satisfies sized_range
(public member function)