[antlr-interest] Why stream name can't be printed out when error occurs(ANTLR C)?
Petteri Räty
betelgeuse at gentoo.org
Wed May 25 12:57:05 PDT 2011
On 05/25/2011 10:39 PM, Jim Idle wrote:
> Why would you need to use a virtual token to issue an error?
>
> Jim
>
The situation happens at least when a tree grammar detects a tree it's
not prepared for. This of course is more common during development than
in production but can't see why bugs couldn't leak there too. An example:
-unknown source-(32) : error 3 : , at offset 8, near (STRING autotools)
: cannot match to any predicted input...
first frames from an another error:
(gdb) bt
#0 antlr3RecognitionExceptionNew (recognizer=0xb74e1978) at
src/antlr3baserecognizer.c:382
#1 0xb7dc7baf in recoverFromMismatchedToken (recognizer=0xb74e1978,
ttype=3, follow=0x0) at src/antlr3baserecognizer.c:1469
#2 0xb7dc6c72 in match (recognizer=0xb74e1978, ttype=3, follow=0x0) at
src/antlr3baserecognizer.c:478
Regards,
Petteri
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