# std::ranges::range_size_t, std::ranges::range_difference_t, std::ranges::range_value_t

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< cpp‎ | ranges

Defined in header `<ranges>` |  |
template< ranges::sized_range R > using range_size_t = decltype( ranges::size ( std::declval <R&>())); | (1) | (since C++20)
template< ranges::range R > using range_difference_t = std::iter_difference_t < ranges::iterator_t <R>>; | (2) | (since C++20)
template< ranges::range R > using range_value_t = std::iter_value_t < ranges::iterator_t <R>>; | (3) | (since C++20)

1) Used to obtain the size type of the `sized_range` type `R`.
2) Used to obtain the difference type of the iterator type of range type `R`.
3) Used to obtain the value type of the iterator type of range type `R`.

### Template parameters

R | - | a `range` type or a `sized_range` type

### See also

iter_value_titer_reference_titer_const_reference_titer_difference_titer_rvalue_reference_titer_common_reference_t (C++20)(C++20)(C++23)(C++20)(C++20)(C++20) | computes the associated types of an iterator (alias template)
ranges::iterator_tranges::const_iterator_tranges::sentinel_tranges::const_sentinel_t (C++20)(C++23)(C++20)(C++23) | obtains iterator and sentinel types of a range (alias template)
ranges::range_reference_tranges::range_const_reference_tranges::range_rvalue_reference_tranges::range_common_reference_t (C++20)(C++23)(C++20)(C++20) | obtains reference types of a range (alias template)

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