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Rorso
Wizard
Joined: 14 Oct 2000
Posts: 1368
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 Posted: Mon Jul 19, 2004 5:07 pm
%1 expansion?
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I noticed that if you make an alias like:
| Code: |
#ALIAS move {
path=""
#if (not %null( %1)) {
#if (%begins( %1, ".")) {
#echo Detected .path
temp=%right( %1, 1)
; Now build the path
path=%subregex( @temp, "(\d)(\a+)", %concat( "%repeat(%2|,%1)"))
} {path = %1}
#echo Added @path
} {%pop( path)}
}
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Then the parser will expand %2, %1 in %repeat when the alias is called with for example "move .n" - even though it is surrounded with double quotes. Is this really correct behaviour? |
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LightBulb
MASTER
Joined: 28 Nov 2000
Posts: 4817
Location: USA
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Posted: Mon Jul 19, 2004 5:45 pm
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Yes.
%1 is normally expanded first, before the rest of the alias is evaluated. Placing it inside double-quotes delays the expansion to the same time that other variables would be expanded, but that still occurs as part of the alias execution. Use %%1 if you don't want it expanded by the alias. |
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_________________
LightBulb
Senior member
Most scripts in this forum are written for Command Line entry.
Don't even open the Settings Editor unless its use is specified or obvious. |
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Rorso
Wizard
Joined: 14 Oct 2000
Posts: 1368
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Posted: Mon Jul 19, 2004 6:17 pm
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| LightBulb wrote: |
Yes.
%1 is normally expanded first, before the rest of the alias is evaluated. Placing it inside double-quotes delays the expansion to the same time that other variables would be expanded, but that still occurs as part of the alias execution. Use %%1 if you don't want it expanded by the alias. |
I'm sorry but that doesn't seem to work.
| Code: |
#ALIAS move {
path=""
#if (not %null( %1)) {
#if (%begins( %1, ".")) {
#echo Detected .path
temp=%right( %1, 1)
; Now build the path
path=%subregex( @temp, "(\d)(\a+)", %concat( "%repeat(%%2|,%%1)"))
} {path = %1}
#echo Added @path
} {%pop( path)}
}
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This is what I get:
> move 2n
Detected .path
Added
This is what should happen:
> move 2n
Detected .path
Added n|n|
If I change the line
path=%subregex( @temp, "(\d)(\a+)", %concat( "%repeat(%%2|,%%1)"))
to
path=%subregex( @temp, "(\d)(\a+)", %concat( "%repeat(%", "2|,%", "1)"))
Then the script behaves correctly. Any idea why? Thanks for helping me. |
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LightBulb
MASTER
Joined: 28 Nov 2000
Posts: 4817
Location: USA
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Posted: Mon Jul 19, 2004 9:19 pm
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Several other commands and functions also use numbered parameters, including #IF.
#ALIAS uses first %
#IF uses second %
Nested #IF uses third %
You need four of them! |
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_________________
LightBulb
Senior member
Most scripts in this forum are written for Command Line entry.
Don't even open the Settings Editor unless its use is specified or obvious. |
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Rorso
Wizard
Joined: 14 Oct 2000
Posts: 1368
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Posted: Tue Jul 20, 2004 9:56 am
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| LightBulb wrote: |
Several other commands and functions also use numbered parameters, including #IF.
#ALIAS uses first %
#IF uses second %
Nested #IF uses third %
You need four of them! |
That actually works  . That is something I haven't seen before but looking it up in the help file I found out it is mentioned in the page about aliases. Thanks for helping me. |
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