How to use named capture value in triggers

Posted by Zhenzh on Tue 16 Jul 2019 07:26 AM — 2 posts, 12,183 views.

Zhenzh China Tue 16 Jul 2019 07:26 AM #0

I find there's a way to name value captured from trigger as mentioned in

Regular expressions

Regular expressions (as used in triggers and aliases) are documented on the Regular expression tips forum page.
Also see how Lua string matching patterns work, as documented on the Lua string.find page.

Regexp: tell (?<who>.+?) (?'what'.+)
Match : tell Nick hi there
Wildcard '1' = 'Nick'
Wildcard '2' = 'hi there'
Wildcard 'who' = 'Nick'
Wildcard 'what' = 'hi there'

The problem is how can I use such named capture in my script.

I used to use script like SetVariable(hp, "%1") to get the first value captured. But it can not work when I tried to use SetVariable(hp, "%hpvalue") to indicate the capture value named by 'hpvalue'.

Nick Gammon Australia Forum Administrator Tue 16 Jul 2019 08:38 PM #1

The help for triggers tells you how to do that. See:

http://www.gammon.com.au/scripts/doc.php?dialog=IDD_EDIT_TRIGGER

Quote:

For named wildcards you can use %<name> (for example, %<mob> for a wildcard with the name "mob"). Named wildcards are produced by using a regular expression and a group like: (?P<mob>.+?)

Also, if you use a script function (not send-to-script) then the wildcards are provided as the 3rd function parameter:


function myTriggerHandler (name, line, wildcards)
  
  print ("Wildcard 'who' is:", wildcards.who)

end -- myTriggerHandler