[antlr-interest] Weird operator precedence

[Sohail Somani]

Hi guys,

In the language I am parsing, the below is valid (I hope its enough of a
grammar for you to help me). I have implemented operator precedence in
the same way as Scott Stanchfields:

exponentExpression
	: primitiveElement (POWER signExpression)*
	;
	
signExpression
	: ((PLUS|MINUS))* exponentExpression
	;

That is, exponentiation has higher precedence than negation except when
the exponent is a signExpression.

However, ANTLR tells me that there is nondeterminism upon k==1:POWER
between alt 1 and exit branch of the exponentExpression. I thought I
understood why ANTLR tells me this, but now I'm not sure. And I'm also
not sure if I can hush this warning safely.

Thanks in advance for your input,

Sohail