Single-line subroutine

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Single-line subroutine

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a_h_k

Joined: 02 Feb 2008
Posts: 626

Posted: Wed Dec 16, 2009 10:03 am Post subject: Single-line subroutine

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Recently i wanted to use a really simple subroutine

Code:

Sendi:Send i

But of course it didn't work (error)

Hotkeys can have them

Code:

Hotkey::Send i

So why not subroutines also ??

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Tuncay n-l-i mobile
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Posted: Wed Feb 24, 2010 6:14 pm Post subject:

yes why not

ruespe

Joined: 17 Jun 2008
Posts: 243

Posted: Wed Mar 03, 2010 9:33 am Post subject:

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Mmmhhh... why should it be easier to write

Code:

Gosub Sendi
:
:
:
Sendi:Send i

than to write

Code:

Send i

Question

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Lexikos

Joined: 17 Oct 2006
Posts: 7295
Location: Australia

Posted: Thu Mar 04, 2010 8:59 am Post subject:

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Why should

Code:

0or1: v := !v
Send %v%
return

be equivalent to

Code:

0or1:
v := !v
return
Send %v%
return

and not

Code:

0or1:
v := !v
Send %v%
return

???

Labels should be nothing more than a way to mark (or label) a particular line. Allowing same-line subroutines by automatically inserting return would be counter-intuitive, especially for users of other languages which have goto/same-line labels, or if goto is used with that particular label. Perhaps this ambiguity is why it is not allowed.

C and some similar languages allow same-line labels, but limit the characters allowed in label names (i.e. to alphanumeric characters/underscore). OTOH, AutoHotkey allows virtually anything besides whitespace, comma or operators like =. Supporting same-line labels while still allowing this freedom would require more complicated parsing methods and might introduce other conflicts.

That aside, I suppose that Gui and Menu would be better examples of where single-line subroutines would be convenient; i.e. because the code must be in a separate subroutine, not in-line.

Code:

Menu, M, Add, Help
Menu, M, Show
ExitApp

Help: MsgBox feature not implemented

OTOH, others have requested capabilities like:

Code:

Menu, M, Add, Help, MsgBox("feature not implemented")
Menu, M, Show
ExitApp

... which would lessen the need for same-line subroutines.

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Posted: Thu Mar 04, 2010 1:47 pm Post subject:

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Likewise (& however useful), perhaps single-line Hotkeys should be removed...cuz there are alot of people making this mistake...

Code:

F9::msgbox, This works...
msgbox, ...but it don't continue? why?

...but maybe instead of removing single-line Hotkeys...AutoHotkey could, by default (& overridably), complain about "stranded code", code that can never be reached, based on positioning...

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