On Sunday, 7 June 2015 at 15:17:27 UTC, 1967 wrote:
I've got a template that takes in a type. Sometimes the type is
a class, sometimes a struct, sometimes just an int. It doesn't
much matter what it is, but if it's a reference type I need to
check if it's null so I can make it not null before using it. I
get an error if I try to check if a value type is null so I'd
like to put a "static if" to check if the type passed to the
template is a nullable one so I can avoid checking the value
types passed in. What do I have to do to check for nullability?
You can directly check whether it allows comparison with null:
static if(is(typeof(value is null) : bool)) {
if(value is null)
...
}
