Difference between revisions of "cpp/types/rank"
From cppreference.com
m (templated see-also list items.) |
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| Line 20: | Line 20: | ||
{{eq fun cpp | {{eq fun cpp | ||
| 1= | | 1= | ||
| − | template< class T> | + | template<class T> |
struct rank : std::integral_constant<std::size_t, 0> {}; | struct rank : std::integral_constant<std::size_t, 0> {}; | ||
| − | template< class T> | + | |
| + | template<class T> | ||
struct rank<T[]> : public std::integral_constant<std::size_t, rank<T>::value + 1> {}; | struct rank<T[]> : public std::integral_constant<std::size_t, rank<T>::value + 1> {}; | ||
| − | template< class T, size_t N > | + | |
| + | template<class T, size_t N > | ||
struct rank<T[N]> : public std::integral_constant<std::size_t, rank<T>::value + 1> {}; | struct rank<T[N]> : public std::integral_constant<std::size_t, rank<T>::value + 1> {}; | ||
}} | }} | ||
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#include <iostream> | #include <iostream> | ||
#include <type_traits> | #include <type_traits> | ||
| + | |||
template<typename A> | template<typename A> | ||
void print_dim(const A&) | void print_dim(const A&) | ||
| Line 39: | Line 42: | ||
std::cout << "The array has " << std::rank<A>::value << " dimensions\n"; | std::cout << "The array has " << std::rank<A>::value << " dimensions\n"; | ||
} | } | ||
| + | |||
int main() | int main() | ||
{ | { | ||
Revision as of 16:32, 8 September 2011
Template:cpp/types/sidebar Template:ddcl list begin <tr class="t-dsc-header">
<td>Defined in header
</td>
<type_traits>
<td></td> <td></td> </tr> <tr class="t-dcl ">
<td >template< class T >
struct rank;
</td>
struct rank;
<td class="t-dcl-nopad"> </td> <td > Template:mark c++11 feature </td> </tr> Template:ddcl list end
If T is an array type, provides the member constant value equal to the number of dimensions of the array. For any other type, value is 0.
Contents |
Member objects
Template:tdcl list begin Template:tdcl list hitem Template:tdcl list item Template:tdcl list end
Equivalent definition
Example
See also
| (C++11) |
checks if a type is an array type (class template) |
| (C++11) |
obtains the size of an array type along a specified dimension (class template) |
| (C++11) |
removes one extent from the given array type (class template) |
| (C++11) |
removes all extents from the given array type (class template) |
