[asterisk-dev] New wildcards for pattern matching

[Klaus Darilion]

_XXX! in overlap mode:

1 is received ... wait for more
1 is received ... wait for more
1 is received ... trigger -> dialed number: 111

_XX. in overlap mode:

1 is received ... wait for more
1 is received ... wait for more
1 is received ... trigger -> dialed number: 111

So, . can be substituted with !

Or do I miss something special with SS7?

regards
klaus

Am 25.02.2010 12:46, schrieb Pavel Troller:
>>> OK, a final '~' meaning 0 or more of the preceding
>>> character or class. Hmmm.   Instead, would it be OK to
>>> make it 1 or more
>>
>> Zero or more makes it more useful as it can replace the ! wildcard too.
>> It is always possible to make it one or more by simply doubling the last
>> char e.g.
>>
>> _123[0-9]~ is a numeric restriction of _123!
>> _123[0-9][0-9]~ is a numeric restriction of _123.
>>
>>
>
> Hi!
>    I'm sorry but I still doesn't understand, how doubling the last char can
> make "." from "!". The main difference between these two symbols are in the
> fact, that "!" makes IMMEDIATE match, while "." tries to collect more digits.
> The difference is visible on channels with overlap dialling support (like
> DAHDI, SCCP and even SIP under certain conditions). For example, when a
> pattern _123. is used and the number 123456 is received in overlap mode (like
> in SS7 IAM message), a timer is started to wait for more digits (possibly
> coming in SAM messages), and if 7, 8 and 9 comes later on, the real ${EXTEN}
> will be 123456789. Using pattern _123! and receiving a number 123456 doesn't
> start any timers, immediately executes the extension and its ${EXTEN} is,
> of course, 123456.
>    Please explain, how can your ~ equivalents of "." and "!" work with my
> examples above.
>    With regards, Pavel.
>