On Friday, 10 August 2018 at 07:01:09 UTC, Petar Kirov
[ZombineDev] wrote:
`is(T == U)` evaluates to true iff `T` is exactly `U`. `is(T :
U)` tests if `T` is a subtype of (can be implicitly converted
to) `U` [0]. So we have:
`is(typeof(assert(0)) == T)` is false, unless `T` is
`typeof(assert(0))`
`is(typeof(assert(0)) : T)` is always true (as bottom is
implicitly convertible to any other type, including itself).
[0]: https://dlang.org/spec/expression#is_expression
So if I need to write something like:
void callback(alias T)() if(is(ReturnType!T == int))
{
}
I have to change it to:
void callback(alias T)() if(is(ReturnType!T == int) ||
is(ReturnType!T == typeof(assert(0)))
{
}
?
