[antlr-interest] java.g NUM_INT

[Ernest Pasour]

When I tried sticking this fix in, it allowed a number like 083 to pass through as an Integer.  I'm not sure exactly why no error is thrown though.  Do you see that behavior?

-----Original Message-----
From: Ray Waldin [mailto:ray at waldin.net] 
Sent: Tuesday, September 23, 2003 7:38 PM
To: antlr-interest at yahoogroups.com
Subject: [antlr-interest] java.g NUM_INT


I sent this earlier and it never showed up on the list, so here it is 
again...


Hi everyone,

I'm new to this group, so apologies if this issue has been raised 
before.  I wasn't able to find any reference to it in the archives.  In 
java.g (Version 1.20) it seems that the NUM_INT rule is broken for cases 
of floats and doubles which have leading zeros and contain the digits 8 
or 9 in the decimal integer or mantissa part.

While the following cases work (by sheer luck, I believe):

> 07.0f
> 06d
> 07e0

these do not:

> 08.0f
> 09d
> 08e0

A quick fix can be found below.

-Ray


--- old/java.g  2003-09-23 15:20:05.000000000 -0700
+++ java.g      2003-09-23 15:21:28.000000000 -0700
@@ -1234,6 +1234,7 @@
                                        }
                                :       HEX_DIGIT
                                )+
+                       |       (('0'..'9')+ 
('.'|EXPONENT|FLOAT_SUFFIX|)) => ('0'..'9')+   // float or double with 
leading zero
                        |       
('0'..'7')+                                                                     
// octal
                        )?
                |       ('1'..'9') ('0'..'9')*  
{isDecimal=true;}               // non-zero decimal



 

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