std::layout_stride::mapping<Extents>:: required_span_size
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<
cpp
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container
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mdspan
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layout stride
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mapping
C++
Containers library
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(C++17)
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(C++11)
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(C++26)
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(C++26)
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(C++11)
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| Unordered associative | ||||
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(C++11)
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(C++11)
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(C++11)
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(C++11)
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(C++23)
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(C++23)
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(C++23)
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(C++23)
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(C++20)
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(C++23)
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| Non-member function table |
std::mdspan
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std::layout_stride::mapping
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mapping::required_span_size
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constexpr
index_type required_span_size
(
)
const
noexcept
;
|
(since C++23) | |
Returns the required size of the mapping.
Let s be equal to:
- 1 , if extents ( ) . rank ( ) == 0 is true ,
- otherwise, 0 , if the size of the multidimensional index space extents ( ) is 0 ,
-
otherwise,
1
plus the sum of products of
extents
(
)
.
extent
(
r
)
-
1
and
extents_type
::
index-cast( strides_ [ r ] ) for all r in the range[ 0 ,extents ( ) . rank ( )).
A call is equivalent to return s ; .
Return value
The required size of the mapping.
Example
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This section is incomplete
Reason: no example |
See also
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returns the required size of the mapping
(public member function of
std::layout_left::mapping<Extents>
)
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returns the required size of the mapping
(public member function of
std::layout_right::mapping<Extents>
)
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returns the size of the multidimensional index space
(public member function of
std::mdspan<T,Extents,LayoutPolicy,AccessorPolicy>
)
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