[antlr-interest] Problem when parsing numerics

[Thomas Woelfle]

Hi,

I've been running into a strange problem using ANTLR 3.1.1. I don't know 
wether it is a bug in my grammar or a bug in ANTLR.
In the language that has to be parsed following lines are legal strings:

1.
1.5.

There is a rule where a numeric is followed by a dot.

The problem with my grammar can be reduced to following sample grammar:


grammar test;

options {language=Java;}

foo     :     NUMERIC '.';

NUMERIC :    '0'..'9'+ ('.' '0'..'9'+)?;


When using this grammar the string '1.5.' can be parsed successfully but 
parsing the string '1.' fails with a MismatchedTokenException. Has 
anybody an idea what is going wrong with my grammar?

Any help appreciated.

Regards,
Thomas

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Interactive Objects Software GmbH
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79100 Freiburg, Germany

Phone:  +49 761 400 73 0
mailto:thomas.woelfle at interactive-objects.com


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