Dlang has an `is` operator and IIRC it is also used to test for void although my memory is hazy. Something like `is(X == void)` https://dlang.org/spec/expressi

Dlang has an `is` operator and IIRC it is also used to test for void although my memory is hazy. Something like `is(X == void)` https://dlang.org/spec/expression.html#is_expression https://dlang.org/spec/expression.html#is_expression