std::is_literal_type
From cppreference.com
Defined in header
<type_traits>
|
||
template< class T >
struct is_literal_type; |
(since C++11) | |
If T
satisfies all requirements of LiteralType
, provides the member constant value
equal true. For any other type, value
is false.
Contents |
Inherited from std::integral_constant
Member constants
value
[static]
|
true if T is a literal type, false otherwise (public static member constant) |
Member functions
operator bool |
converts the object to bool, returns value (public member function) |
operator()
(C++14)
|
returns value (public member function) |
Member types
Type | Definition |
value_type
|
bool
|
type
|
std::integral_constant<bool, value> |
[edit] Notes
Only literal types may be used as parameters to or returned from constexpr functions. Only literal classes may have constexpr member functions.
[edit] Example
Run this code
#include <iostream> #include <type_traits> struct A { int m; }; struct B { virtual ~B(); }; int main() { std::cout << std::boolalpha; std::cout << std::is_literal_type<A>::value << '\n'; std::cout << std::is_literal_type<B>::value << '\n'; }
Output:
true false
[edit] See also
(library fundamentals TS)
|
variable template alias of std::is_literal_type::value (variable template) |