[antlr-interest] need help with predicates
antlr at jazillian.com
Fri Aug 10 13:20:45 PDT 2007
Johannes Luber wrote
>> Why don't you test, when you encounter at the identifier the bang, if
>> input.LT(1) is a space? If not then it can't be a suffixed bang. (What
>> does "a!" actually mean in VB?)
Yes, Alexandre pointed out that spacing does matter in VB.
The "!" operator can't be followed by a space.
On the other hand, the "!" suffix isn't necessarily followed by a space
So, I've added a simple syntactic predicate. If the character after the "!"
is a letter, I assume the "!" is the binary operator, otherwise its the
('!' ~(LETTER)) => '!'
Thanks Johannes, Tom, and Alexandre!
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