std::meta::is_null_pointer_type
Defined in header <meta> | ||
|---|---|---|
consteval bool is_null_pointer_type( std::meta::info r ); | (since C++26) |
Returns true if r represents (possibly cv-qualified) std::nullptr_t type. Otherwise returns false.
Parameters
| r | - | a reflection value |
Return value
true if r represents std::nullptr_t type; otherwise false.
Exceptions
Throws std::meta::exception if r does not represent a type or type alias.
Example
#include <meta>
static_assert
(""
and is_null_pointer_type(^^decltype(nullptr)) == true
and is_null_pointer_type(^^const std::nullptr_t) == true
and is_null_pointer_type(^^volatile decltype(nullptr)) == true
and is_null_pointer_type(std::meta::add_cv(^^decltype(nullptr))) == true
and is_null_pointer_type(^^int*) == false
and is_null_pointer_type(^^void) == false
and is_null_pointer_type(^^void*) == false
);
int main() {}
See also
|
(C++26) | checks if reflected type is a pointer type (function) |
|
(C++26) | checks if reflected type is an array type (function) |
|
(C++11)(DR*) | checks if a type is std::nullptr_t (class template) |
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