[superseded] Add optional recursive argument to typetraits.distinctBase

[ALANVF]

Should be self-explanatory.

Example code:

import typetraits

type
    A = distinct int
    B = distinct A

echo B.distinctBase        #=> int
echo B.distinctBase(false) #=> A

This theoretically shouldn't break anything because recursive is true by default

[konsumlamm]

Is this really the best way to do this? Can't this read the static bool directly somehow?

[ALANVF]

I'm pretty sure that it is (also see my last change, replaced operand2 with traitCall[2])

[timotheecour]

this code is incorrect, and fails; see correct way here: #18659

[timotheecour]

see #18659