[Grace-core] Precedence of multi-part method names
James Noble
kjx at ecs.vuw.ac.nz
Fri May 27 17:59:30 PDT 2011
> There are some more pathological cases as well, especially in the
> "looks like mixfix" line. Something like "f g h i" is arguably legal,
> meaning f(g(h(i))), but it's ambiguous with f(g)h(i) (and wouldn't be
> bad to ban in any case).
yep. the smalltalk syntax - which seems somewhat cleaner than Grace now,
although I was hoping that wouldn't happen - has ambiguous cases
a b: c d: e
could be parsed as a.b(c) d(e) - a request of b()d() on object a - in Grace terms
OR as (a.(b)).d(e)
Smalltalk just pickes the first one, basically taking the "longest" matchfix match.
Self fiddles with these rules a bit, so you have to capitalise a b: c D: e -
Newspeak went back to the Smalltalk rules here.
I know I'll find it hard to read
a b c d
as meaning
a(b(c(d()))
rather than
a.b().c().d()
J
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