[antlr-interest] Problem when parsing numerics

[Thomas Woelfle]

Hi Jim,

thanks for the tip. This lexer grammar for floating points is quite 
impressive and answers some interesting questions to me. But it did not 
solve my problem. Using the toekn rule 'FLOATING_POINT_LITERAL' in my 
grammar results in the same MismatchedTokenException. My adjusted 
grammar is:

foo     :     FLOATING_POINT_LITERAL '.';

where "FLOATING_POINT_LITERAL" is the rule from your example.

Parsing the input string "1.5." results in a MismatchedTokenException. 
Any idea what is going wrong?

Regards,
Thomas
> Thomas Woelfle wrote:
>   
>> 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.
>>   
>>     
> Please look in the FAQ/examples:
>
> http://www.antlr.org/wiki/display/ANTLR3/Lexer+grammar+for+floating+point%2C+dot%2C+range%2C+time+specs
>
> You should be able to simplify the grammar here to just what you need.
>
> Jim
>
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>   


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