std::meta::is_abstract_type
Defined in header <meta> | ||
|---|---|---|
consteval bool is_abstract_type( std::meta::info r ); | (since C++26) |
Returns true if r represents an abstract class type (that is, a non-union class that declares or inherits at least one pure virtual function). Otherwise returns false.
Parameters
| r | - | a reflection value |
Return value
true if r represents an abstract class type; otherwise false.
Exceptions
Throws std::meta::exception if r does not represent a type or type alias.
Example
#include <meta>
struct A { int m; };
static_assert(is_abstract_type(^^A) == false);
struct B { virtual void foo(); };
static_assert(is_abstract_type(^^B) == false);
struct C { virtual void foo() = 0; };
static_assert(is_abstract_type(^^C) == true);
struct D : C {};
static_assert(is_abstract_type(^^D) == true);
int main() {}
See also
|
(C++11) | checks if a type is an abstract class type (class template) |
|
(C++26) | checks if reflected type is a non-union class type (function) |
|
(C++26) | checks if reflected type is a union type (function) |
|
(C++26) | checks if reflected type is a polymorphic class type (function) |
|
(C++26) | checks if reflected type has a virtual destructor (function) |
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