[antlr-interest] References from Parser Rules to Lexer Fragments Should Elicit Diagnostic

[Randall R Schulz]

Hi,

I finally found the last vexing problem in my combined lexer + parser 
grammar.

It turns out I had a parser / non-terminal rule that referred to a lexer 
fragment. I would not / could not match at run time, but there was no 
warning given at the point of reference.

I think references to lexer fragments from parser rules should produce a 
diagnostic.


Randall Schulz