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Strange behavior of INT [message #1016513]

Wed, 06 March 2013 17:53

Robert Brown III

Messages: 36
Registered: July 2009

Member

Greetings:

Using the set of rules provided below:

Date : 'Date' ':' d=Day m=Month y=Year ;

Day : INT ;
Month : 'Jan'|'Feb'|'Mar'|'Apr' ;
Year : INT ;

I am seeing some very strange behavior in Day's input. I am noticing that single numbers (like 1 through 9) cause errors in the generated DSL. In other words, the line:

Date: 1 Mar 1912

causes "mismatched input" errors in the DSL.

Another thing that causes "mismatched input" errors is the use of the numbers 11 and 12. No lines can use these numbers at all. This includes lines like:

Date: 12 Mar 1999
or
Date: 11 Jan 2013

Curiously, the numbers 10 and 13 on up are accepted as INTs.

Something is clearly not kosher here. Could someone please explain how I can make INT take single-digit numbers and the numbers 11 and 12???

Thanks in advance for any insights and/or fixes...

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Re: Strange behavior of INT [message #1016520 is a reply to message #1016513]

Wed, 06 March 2013 18:31

Christian Dietrich

Messages: 14716
Registered: July 2009

Senior Member

Hi,

the grammar

MOdel:
dates+=Date*
;

Date : 'Date' ':' d=Day m=Month y=Year ;

Day : INT ;
Month : 'Jan'|'Feb'|'Mar'|'Apr' ;
Year : INT ;

works fine for me so there must be some other terminals/keywords in your grammar that collide with INT

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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