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TL
Joined: 01 Nov 2006
Posts: 9
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 Posted: Fri Mar 14, 2008 3:15 am Post subject: |
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Thanks. You provided just the insight I was looking for.
TL |
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Guest
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| Posted: Fri Mar 14, 2008 4:27 am Post subject: |
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Is it planned to support direct invoking like
| Code: | testa()
{
MsgBox, testa
}
("test" . "a")() |
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Lexikos
Joined: 17 Oct 2006
Posts: 2359
Location: Australia, Qld
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| Posted: Fri Mar 14, 2008 10:11 am Post subject: |
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| If I think of a simple way to implement it, I might. For now it seems of too little benefit. |
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Tuncay
Joined: 07 Nov 2006
Posts: 379
Location: Berlin
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| Posted: Fri Mar 14, 2008 11:22 pm Post subject: |
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| Anonymous wrote: | Is it planned to support direct invoking like
| Code: | testa()
{
MsgBox, testa
}
("test" . "a")() |
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I am not understanding this. How would this work? |
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Laszlo
Joined: 14 Feb 2005
Posts: 3877
Location: Pittsburgh
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| Posted: Fri Mar 14, 2008 11:31 pm Post subject: |
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Not much could be saved with this alone, but it is hard to understand, what is intended: | Code: | fun := "test" . "a"
%fun%() |
I proposed long ago to use square brackets to force evaluation inside. That is easier to the eyes. |
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corrupt
Joined: 29 Dec 2004
Posts: 2328
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| Posted: Sun Mar 16, 2008 8:23 am Post subject: |
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Thanks for the update  . Now... to find those test scripts I had put aside that would benefit from dynamic function calling... |
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Ian
Joined: 15 Jul 2007
Posts: 1077
Location: Enterprise, Alabama
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| Posted: Sun Mar 16, 2008 9:02 pm Post subject: |
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@ corrupt
| Code: | Loop, 4 {
Func%A_Index%()
}
Func1() {
MsgBox, Func 1
}
Func2() {
MsgBox, Func2
}
Func3() {
MsgBox, Func3
}
Func4() {
MsgBox, Func4
} |
Something that would require calling multiple functions. |
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SKAN
Joined: 26 Dec 2005
Posts: 5298
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| Posted: Fri Apr 04, 2008 10:04 pm Post subject: |
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| would we have a Isfunction() ? |
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Lexikos
Joined: 17 Oct 2006
Posts: 2359
Location: Australia, Qld
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| Posted: Sat Apr 05, 2008 1:15 am Post subject: |
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Even if you know a function exists, the call may fail because of incorrect parameter count or use of ByRef. I haven't thought of a (syntactically) good solution yet.
If you are using dynamic calls to implement "callbacks" which are required to not use ByRef, you may use RegisterCallback to validate the function:
| Code: | GetFuncParamCount(FuncName, ByRef MinParams, ByRef MaxParams)
{ ; Fails for functions which are built-in or use ByRef.
if cb := RegisterCallback(FuncName)
{
MinParams := NumGet(NumGet(cb+28)+16)
MaxParams := NumGet(NumGet(cb+28)+12)
DllCall("GlobalFree","uint",cb)
return true
}
return false
} |
If you don't need to validate before calling the function, you may use the following. By setting a byte within the string to 0, you can unambiguously detect failure:
| Code: | F = TestFunc
NumPut(0,r:=1,0,"char")
, r:=%F%() ; Must be part of a multi-statement expression.
if StrLen(r)=1 && !NumGet(r,0,"char")
MsgBox, r contains a value that could not ever be returned by a function
, so the call must have failed. |
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SKAN
Joined: 26 Dec 2005
Posts: 5298
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| Posted: Sat Apr 05, 2008 5:16 am Post subject: |
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| The second one is nice.. Thanks Lexikos. |
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