Brendan Eich wrote:
Herby Vojčík wrote:
Herby Vojčík wrote:
Possible Smalltalk-inspired precedent is also:
(:x, y) x+y
(:x) (:y) "z"
(:x) (y) "z"
(:x) (y) (z)
I think I like this most...
Herby
We've talked about these variations, but they all seem grawlixy or worse
(the C++ pre-11x bug with template instantiation nesting where you have
to put a space between > and > to avoid writing a right-shift operator).
I agree this one is nicer but it's still grawlixy, or emoticon-y ;-). It
does avoid the ambiguous grammar worry, on the up side.
Well, I just wanted easy way to retain familiar '(params) expr' syntax,
but to use something lightweight (not % or @ or something like it) to
disambiguate it so to make parsing it possible.
Dot is even more lightweight, but maybe could look grawlixy to many, too:
(.x) (.y) "z"
(.x, y) x+y
or maybe better
.(x) .(y) "z"
.(x, y) x+y
shortFoo .(bar) bar+1
(though, if parenfree Russell's one could get in, it would probably be
help more, there is many parens already)
The fat-arrow, =>, is better, and it can be made to work if we figure
out and agree to pay for the spec-grammar validation against ambiguity
work.
Maybe this could even be competely paren-free (tell me where it breaks):
:x, :y x+y
:x :y "z"
:x (y) "z"
:x (y) (z)
Imagine the code like coll.map(:x x*x) or coll.filter(:x x%2==1).
Formal parameter list syntax should include all the bells and whistles
(rest parameter optional at end, paramater default values for trailing
formals, destructuring patterns) so we should be conservative.
Is this the problem of Russell's
:x, y => x+y
as well?
One-parameter paren-free special casing, as in C#, is plausible.
x => x*x
(x,y) => x*y
I do not like special cases much.
Thanks for throwing out alternative syntaxes. We should keep beating on
this anvil, shorter function syntax is well worth it. But we need a
I am doing it now.
non-GLR parsing procedure that rejects ambiguous grammars.
/be
Herby
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