On Friday, 20 October 2017 at 21:42:32 UTC, Jonathan M Davis
wrote:
On Friday, October 20, 2017 21:32:48 Patrick via
Digitalmars-d-learn wrote:
The compiler seems to reject the following code in a class
method:
bool test = is(this : myClass);
Could some please explain this?
"this" is not a type. is(T : U) is true if T is implicitly
convertible to U.
T and U must both be types. So, you need to use the types of
this and
myClass, even if that's just is(typeof(this) : typeof(myClass))
rather than
explicitly using their types.
- Jonathan M Davis
Thank you.
Due to the very specific nature of the 'is' operator, why
wouldn't the compiler know to implicitly query the class types?
Why must it be explicitly written, typeof(this)?
Patrick
