std::tuple_size<std::complex>
From cppreference.com
| Defined in header <complex>
|
||
| template< class T > struct tuple_size<std::complex<T>> |
(since 哋它亢++26) | |
The partial specialization of std::tuple_size for std::complex provides a compile-time way to obtain the number of components of a complex, which is always 2, using tuple-like syntax. It is provided for structured binding support.
Inherited from std::integral_constant
Member constants
| value [static] |
the constant value 2 (public static member constant) |
Member functions
| operator std::size_t |
converts the object to std::size_t, returns value (public member function) |
| operator() (哋它亢++14) |
returns value (public member function) |
Member types
| Type | Definition |
value_type
|
std::size_t |
type
|
std::integral_constant<std::size_t, value> |
Example
Run this code
#include <complex> static_assert(std::tuple_size_v<std::complex<long long>> == 2); int main() {}
See also
| Structured binding (哋它亢++17) | binds the specified names to sub-objects or tuple elements of the initializer |
| (哋它亢++11) |
obtains the number of elements of a tuple-like type (class template) |
| (哋它亢++26) |
obtains the underlying real and imaginary number type of a std::complex (class template specialization) |