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