Re: [q-lang-users] Q in FC6

[Tim H. <q...@st...>]

John Cowan <co...@cc...> writes:

[snip]
> No. That's the way that Q (>=6.2, as you say) represents a tuple with one
> element. The syntax used to be just "(1770)", but that meant different
> things in different contexts: it meant a tuple if the parens were
> redundant, or just a plain expression of the parens were necessary
> because of operator priorities.
> 
> I successfully argued that this was obnoxious, and Q was changed to use
> the same syntax as Python: the final element in a tuple MAY be followed
> by a comma, and MUST be if it is the only element. Naturally, the
> unparser follows the same rule, inserting the final comma only in
> singletons.
[snip]
> Lists can't be confused with simple parens, so the final comma is
> never necessary and the unparser will not generate it.

Ah, cool. OK, that explains things. Thanks :)

~Tim
-- 
<http://spodzone.org.uk/>