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Rhys
PostPosted: June 5th, 2008, 3:49 am 
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Joined: April 17th, 2007, 1:37 pm
Posts: 761
Location: Florida
I'm not sure if this is a bug or not, but the following code fails:
Code:
MsgBox,% Add() ;4 (3 + 1)
MsgBox,% Add(2) ;3 (2 + 1)
MsgBox,% Add(,2) ;Error but should be 5 (3 + 2)

Add(x=3, y=1)
{
    return x + y
}
What am I doing wrong? Is it not possible to leave the first parameter of a function blank but provide other parameters?

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Last edited by Rhys on June 5th, 2008, 6:16 am, edited 1 time in total.

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trik
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PostPosted: June 5th, 2008, 4:08 am 
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It doesn't want you to omit parameters.

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Rhys
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PostPosted: June 5th, 2008, 5:39 am 
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But I can omit parameters in the first two lines without issue.

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engunneer
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PostPosted: June 5th, 2008, 5:51 am 
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I think all of the omitted parameters must be last. I think this is the same reasoning that all optional parameters in the function definition must be last as well. If you could omit parameters that were followed by non-omitted parameters, then this would not be a requirement.

The closest relevant documentation is
chm wrote:
It is not possible to have optional parameters isolated in the middle of the parameter list. In other words, all parameters that lie to the right of the first optional parameter must also be marked optional.


This could probably be explained a bit further, and may actually be elsewhere in the Functions page, but I did not see it on a quick glance.

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Rhys
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PostPosted: June 5th, 2008, 6:15 am 
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That makes sense, thanks!

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corrupt
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PostPosted: June 5th, 2008, 6:22 am 
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There are likely alternatives depending on what you'd like to accomplish :)
Code:
MsgBox,% Add() ;4 (3 + 1)
MsgBox,% Add(2) ;3 (2 + 1)
MsgBox,% Add("",2)
MsgBox,% Add(myvar,2)
b = pickles
MsgBox,% Add(b,8)


Add(x="", y=1)
{
  if x is not number
    X=3
    return x + y
}


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