 Error with evaluation brackets
#268909
13/05/21 10:00 PM
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Joined: Jan 2009
Posts: 21
Imk0tter
OP
Ameglian cow
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OP
Ameglian cow
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Posts: 21 |
[ %var ] == $eval(%var,1)
[ [ %var ] ] == $eval(%var,2)
how come no brackets isn't $eval(%var,0) ?? it should be changed so that:
var %x test
var %x [ %x ] $+ .please
echo -a [ %x ]
echo's: test.please and
var %x test
var %x %x $+ .please
echo -a [ %x ]
echo's: %x.please and
var %test.please this is a test
var %x test
var %x %x $+ .please
echo -a [ [ %x ] ]
echo's: this is a test
var %x %sometest
var [ %x ] this is a test
echo -a [ %sometest ]
echo -a [ [ %x ] ]
echo's: this is a test
Last edited by Imk0tter; 13/05/21 11:30 PM.
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Re: Error with evaluation brackets
[Re: Imk0tter]
#268913
14/05/21 12:39 AM
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Joined: Jan 2009
Posts: 21
Imk0tter
OP
Ameglian cow
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OP
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Posts: 21 |
you would need to use a special character to do $+ ie the ~ or some unused character
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Re: Error with evaluation brackets
[Re: Imk0tter]
#268914
14/05/21 02:43 AM
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Joined: Jan 2004
Posts: 1,805
maroon
Hoopy frood
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Hoopy frood
Joined: Jan 2004
Posts: 1,805 |
You're not going to have the language redefined after all these years. Depending on what you want to do, there may be some other constructs which achieve what you want.
//echo -a $eval($1,0) and $ $+ 1 and $!1
//var -sp %var abc $+ $chr(32) | var -s %a $gettok(sha1 sha256,$r(1,1),32) | echo -a $qt(%var) -> $($+($,%a,$chr(40),$eval(%var,0),$chr(44),0,$chr(41)),2) and $sha1(abc $+ $chr(32)) and $sha1(%var)
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Re: Error with evaluation brackets
[Re: maroon]
#268919
14/05/21 03:41 PM
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Joined: Jan 2009
Posts: 21
Imk0tter
OP
Ameglian cow
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my question is how come [ %var ] doesn't yeild $eval($eval(%var,0),1)
Last edited by Imk0tter; 14/05/21 05:25 PM.
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Re: Error with evaluation brackets
[Re: Imk0tter]
#268920
14/05/21 03:49 PM
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Joined: Jan 2009
Posts: 21
Imk0tter
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Ameglian cow
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on the tutorial at http://www.xise.nl/mirc/wiki/doku.php?id=eval [ A $+ B $+ C ] <=> [ [ A $+ B ] $+ C ] <=> $eval($eval($eval($eval(A,1) $+ $eval(B,0),2),1) $+ $eval(C,0),2) which should be: [ A $+ B $+ C ] <=> [ [ A $+ B ] $+ C ] <=> $eval($eval($eval(A,0) $+ $eval(B,0),1) $+ $eval(C,0),1) and [ $ev(b) [ $ev(c) [ $ev(d) ] ] ] should be $eval($eval($ev(b),0) $eval($eval($ev(c),0) $eval($eval($ev(d), 0),1),1),1) but the latter might be attempting to do the following [ [ $ev(b) ] [ [ $ev(c) ] [ [ $ev(d) ] ] ] ] which is $eval($eval($eval($ev(b),0),1) $eval($eval($eval($ev(c),0),1) $eval($eval($eval($ev(d),0),1),1),1),1)
Last edited by Imk0tter; 14/05/21 07:10 PM.
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Re: Error with evaluation brackets
[Re: Imk0tter]
#268921
14/05/21 04:54 PM
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Joined: Jul 2006
Posts: 3,930
Wims
Hoopy frood
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Hoopy frood
Joined: Jul 2006
Posts: 3,930 |
The explanation are correct, what do you mean by 'should' be?
element on a line are evaluated once in normal time. [ ] are not a way to evaluate some extra times, they only do it by side effect, [ ] change the order of the evaluation on the line, one [ ] means evaluates one time, same as without [ ]
#mircscripting @ irc.swiftirc.net == the best mIRC help channel
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Re: Error with evaluation brackets
[Re: Imk0tter]
#268924
14/05/21 07:48 PM
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Joined: Jan 2009
Posts: 21
Imk0tter
OP
Ameglian cow
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OP
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ultimately if the default evaluator for identifiers is 1, then should be the equivelent of
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Re: Error with evaluation brackets
[Re: Imk0tter]
#268925
14/05/21 08:39 PM
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Joined: Dec 2002
Posts: 5,150
Khaled
Hoopy frood
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Hoopy frood
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Posts: 5,150 |
The [ ] brackets and the $eval() identifier are not related and share no common code. The [ ] brackets were added very early on in the scripting language's development to solve a specific purpose. They use their own parsing code that is separate from the rest of the scripting language that continued to evolve around them. As with all scripting features that have been in place for a long time, their behaviour cannot be changed, as that could break backward compatibility.
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Re: Error with evaluation brackets
[Re: Khaled]
#268926
14/05/21 09:12 PM
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Joined: Jan 2009
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Imk0tter
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Ameglian cow
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The [ ] brackets and the $eval() identifier are not related and share no common code. The [ ] brackets were added very early on in the scripting language's development to solve a specific purpose. They use their own parsing code that is separate from the rest of the scripting language that continued to evolve around them. As with all scripting features that have been in place for a long time, their behaviour cannot be changed, as that could break backward compatibility. i think it could be a good feature; anyone who doesn't want to modify their scripts can use an older version of mIRC!
Last edited by Imk0tter; 14/05/21 09:18 PM.
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Re: Error with evaluation brackets
[Re: Imk0tter]
#268927
14/05/21 09:15 PM
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Joined: Jan 2009
Posts: 21
Imk0tter
OP
Ameglian cow
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you would need to use a special character to do $+ ie the ~ or some unused character instead of using a special character you could put the $+ in evaluation brackets IE: becomes [ [ A [ $+ ] B ] [ $+ ] C ]
Last edited by Imk0tter; 14/05/21 09:23 PM.
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Re: Error with evaluation brackets
[Re: Imk0tter]
#268928
14/05/21 09:22 PM
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Joined: Jan 2004
Posts: 1,805
maroon
Hoopy frood
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Hoopy frood
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I still don't understand what the "feature" is. Can you specifically explain what the current version cannot do in relation to brackets? Other than the one I mentioned in channel where [ bracket ] strips spaces the same way the /tokenize 32 command would, so you'd need to switch over to something like $!1 or $eval() in order to preserve them.
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Re: Error with evaluation brackets
[Re: maroon]
#268930
14/05/21 09:31 PM
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Joined: Jan 2009
Posts: 21
Imk0tter
OP
Ameglian cow
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I still don't understand what the "feature" is. Can you specifically explain what the current version cannot do in relation to brackets? Other than the one I mentioned in channel where [ bracket ] strips spaces the same way the /tokenize 32 command would, so you'd need to switch over to something like $!1 or $eval() in order to preserve them. i would call the feature 'proper evaluation'. with a default evaluator of 1 this code works but ultimately with a default evaluator of zero this would be the code to get the value of that variable you would use (for a default evaluator of 1) but with an evaluator of 0 it would be i can't figure out how to do this with the way the current bracket evaluator works! EDIT: apparently it's but this is unintuitive and doesn't make much sense! EDIT: apparently it's but this is unintuitive and doesn't make much sense! this (in my world) breaks down to (with an evaluator of 0): but is more properly written as (i'm not quite sure what) evaluates to
Last edited by Imk0tter; 14/05/21 09:55 PM.
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Re: Error with evaluation brackets
[Re: Khaled]
#268933
16/05/21 02:52 PM
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Joined: Jan 2009
Posts: 21
Imk0tter
OP
Ameglian cow
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OP
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The [ ] brackets and the $eval() identifier are not related and share no common code. The [ ] brackets were added very early on in the scripting language's development to solve a specific purpose. They use their own parsing code that is separate from the rest of the scripting language that continued to evolve around them. As with all scripting features that have been in place for a long time, their behaviour cannot be changed, as that could break backward compatibility. what's the point of $eval when you have [ ] brackets? to eval dynamically you can
var %x 4,%y $!1
while %x {
%y = [ %y ]
dec %x
}
or even make your own eval function
Last edited by Imk0tter; 16/05/21 03:02 PM.
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Re: Error with evaluation brackets
[Re: Imk0tter]
#268934
16/05/21 04:57 PM
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Joined: Dec 2002
Posts: 5,150
Khaled
Hoopy frood
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Hoopy frood
Joined: Dec 2002
Posts: 5,150 |
what's the point of $eval when you have [ ] brackets? The [ ] brackets were added when the scripting language was still in its infancy. $eval() was added later on as a method that was more in line with how the rest of the scripting language was evolving. This is what happens when you develop an application over a 25 year period while trying to maintain backward compatibility. It is your choice to use whichever one you find more useful in any particular situation. Thanks for your comments everyone. This thread is now closed.
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