std::tuple_size(std::span)
Defined in header <span> | ||
|---|---|---|
template< class T, std::size_t N >
class tuple_size< std::span<T, N> > :
public std::integral_constant<std::size_t, N>
{ };
| (1) | (since C++20) |
template< class T > class tuple_size< std::span<T, std::dynamic_extent> >; // Not defined | (2) | (since C++20) |
Provides access to the number of elements in a static-extent span as a compile-time constant expression. If the span has dynamic extent, the tuple_size specialization is an incomplete type.
Inherited from std::integral_constant
Member constants
| value
[static] | N, the number of elements in the span (public static member constant) |
Member functions
| operator std::size_t | converts the object to std::size_t, returns value (public member function) |
| operator()
(C++14) | returns value (public member function) |
Member types
| Type | Definition |
|---|---|
value_type | std::size_t |
type | std::integral_constant<std::size_t, value> |
Example
See also
obtains the size of tuple at compile time (class template specialization) |
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