Hi all,
I am studying parser generation and came across ANTLR which I have
found very intriguing.
I have been trying to put a grammar together (just for learning
purposes), and ran into a problem. I have managed to reduce the
grammar into just several lines which reproduces the problem.
Grammar:
=======
grammar quickTest;
start : NUMBER '..' NUMBER;
NUMBER
: '0' | '1'..'9' '0'..'9'* ('.' '0'..'9'+)?;
WHITESPACE
: (' '|'\t'|'\r'|'\n'){$channel = HIDDEN;};
The grammar works with the following inputs:
1 .. 10
1.0 .. 10.0
1.0..10.0
1.0..10
BUT, the grammar does not work for the following input:
1..10
[15:04:03] problem matching token at 1:3 MismatchedSetException(46!=
{48,49,50,51,52,53,54,55,56,57})
Can anybody help me with this issue?
Many thanks,
Lea Hayes
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