std::experimental::reflect:: Lambda

From cppreference.com
Extensions for reflection
Concepts
Meta-object operations
Variable
FunctionParameter
Callable
Variable and Callable
Namespace and Callable
ParenthesizedExpression
FunctionCallExpression
FunctionalConversion
Variable and Function
Defined in header <experimental/reflect>
template < class T >
concept Lambda = Type < T > && Scope < T > && /* see below */ ;
(reflection TS)

The Lambda concept is satisfied if and only if T reflects a closure object (excluding generic lambdas).

Example

See also