[grammarians] ambiguity with method call?

[mental@rydia.net]

Wait.  All of you.  Thank you very much, but all those additional
details don't alter the way 'foo[1]' and 'foo [1]' are parsed.
Doesn't matter how many arguments a foo method takes.  Doesn't
matter whether a foo lvar references an Array, a Proc, or Cheese.

Please have pity on Ter and stick to minimal complete examples like
these (each parsed separately):

 1. foo[1]

 2. foo [1]

 3. foo = nil
    foo[1]

 4. foo = nil
    foo [1]

Then focus on the relevent differences:

           space        no space

 method:  foo([1])     foo.[](1)

   lvar:  foo.[](1)    foo.[](1)

So, there are really only two possibilities he has to consider:

 method, with space: foo([1])

 any other combination of method/lvar/space: foo.[](1)

[ side note: it is good to point out, as Brian did, when a
particular construct (#2 in this case) is deprecated.  Sure, we'll
still have to parse it for the time being, but we can at least
stick a comment in the grammar. ]

-mental