[antlr-interest] Need help with simple grammar

[Florian Weimer]

* Johannes Luber:

> tokens {
> 	GET='get';
> 	PUT='put';

> target
> 	:	FILE
> 	;
>
> You still have to change the target rule to allow arbitrary filenames
> and include predicates which filter the invalid sentences out (supposing
> all your examples were entirely inclusive).

By the way, is there an easy way to accept any non-empty,
non-whitespace string for FILE, including "get", "put", etc.?