[antlr-interest] Unit testing grammar productions and injecting EOF

[Kaleb Pederson]

I have a grammar that contains the following production:

objectMember : functionExpression | ID;

The unit tests for the above production, however, sometimes passed and
sometimes failed.  After some investigation, I found that the reason
for the failure was that EOF wasn't in the expected follow set, which
makes sense when I'm parsing the whole language.

As a workaround, I changed my production, adding EOF as an optional
terminal as follows:

objectMember : functionExpression EOF? | ID EOF?;

Everything now works but I'm curious if a better solution for testing
individual grammar productions exists.  Suggestions or alternatives?

Thanks.

--Kaleb

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