AutoIt v3.3.13.19 Beta

[Jon]

Jon, why is this error:

$a = 1

A($a + 5)


Func A(ByRef $x)
EndFunc

I'll check. I rewrote a lot of that code

[Melba23]

Hi,

Pardon my ignorance, but can someone please explain why passing such a parameter ByRef should not be an error? Surely the main purpose of passing a parameter ByRef is to allow the function to alter the value of the original - how can than happen when the parameter is a construct?

M23

[JohnOne]

I thought the primary reason for ByRef was so a copy was not made.

Rightly or wrongly, I would have thought that the param would be treated as const and only give an error if an attempted change of the value was made.

[Richard Robertson]

I thought the primary reason for ByRef was so a copy was not made.

Rightly or wrongly, I would have thought that the param would be treated as const and only give an error if an attempted change of the value was made.

Reference parameters pass the handle to the original object store (variable, property, another parameter, any L-Value, etc) so that changes made are stored to the original and no copy is made for complex objects.

I don't know why trancexx would expect an R-Value to work.

[Jon]

There's no reason it couldn't just pass the value and throw away any modifications. Which is what the com code does with byref in some cases iirc.

[DXRW4E]

Reference parameters pass the handle to the original object store (variable, property, another parameter, any L-Value, etc) so that changes made are stored to the original and no copy is made for complex objects.

I don't know why trancexx would expect an R-Value to work.

I'm not a pro of the C++ indeed I know little, but what do I know that is not Rvalue or Lvalue that is a temporary object (that must be destroyed when no longer needed), and a temporary object is const, all standart library have already func (with paramenter) in pointer and reference and const and non-const (Operator and Function Overloading, if not this does not work after (1 + (2 + 3)) or ("String1" + ("Sring2" + "String3")) etc etc), so is not wrong to send a temporary object as (const) byref

 

Ciao.

Edited August 27, 2014 by DXRW4E

[JohnOne]

Don't forget kids, we;re talking about AutoIt here not C or C++.

[DXRW4E]

@OffTopic

Don't forget kids

Are you kidding me???? you're kidding right ????

 

we;re talking about AutoIt here not C or C++.

discussion is in general (see hereeeeeee ) and C++ is the best example that explains it

 

Ciao.

Edited August 27, 2014 by DXRW4E

[JohnOne]

No, I'm not kidding, were talking about what should or should not happen within an AutoIt script, not the internal C++ workings of the AutoIt interpreter.

[trancexx]

Reference parameters pass the handle to the original object store (variable, property, another parameter, any L-Value, etc) so that changes made are stored to the original and no copy is made for complex objects.

 

I don't know why trancexx would expect an R-Value to work.

Because since 6 years ago AutoIt allows rvalues passed as argument byref. It's documented behaviour.

$a = 1

A(($a + 5)) ; notice extra parentheses


Func A(ByRef $x)
EndFunc

...or if it would be more obvious:

A(77)


Func A(ByRef $x)
EndFunc

 

Besides, the example I showed earlier indeed produces unexpected behaviour, which can be seen if you look at some standard UDFs and their definitions. For example take function _WinAPI_StringLenA(). Param is Const Byref, That means I can't do this:

$tStr = DllStructCreate("char[100]")
$pStr = DllStructGetPtr($tStr)

DllStructSetData($tStr, 1, "QWERTZ")


$iLen = _WinAPI_StringLenA($pStr + 1) ; one character ahead
ConsoleWrite($iLen & @CRLF)

... That example must print 5 to console, and currently it can't even be run. The person who added "Const Byref" to function definition obviously didn't expect interpreter to error-out on something like that.

[jpm]

I can agree Const Byref make sense but Just ByRef updating the value cannot be done so for me it is an error

[trancexx]

I can agree Const Byref make sense but Just ByRef updating the value cannot be done so for me it is an error

Who are you? Really, who are you?

For your information developer Jpm added the feature to the language. Are you that Jpm or someone else?

[mLipok]

I've starting uploading the beta docs as well.

Beta docs: https://www.autoitscript.com/autoit3/files/beta/autoit/docs/

Script breaking changes: https://www.autoitscript.com/autoit3/files/beta/autoit/docs/script_breaking_changes.htm

 

I see there is now v3.3.13.20 (Beta) doc

Is it mean that OnLine version of Beta Doc is updated much often / many more times then beta CHM version ?

[Melba23]

mLipok,

No, as a Beta version is released the various files in the repository automatically update to the next version number. The files to which Jon has linked were pulled directly from the repository and so have that number.

M23

[Inververs]

FileOpen with $FO_UTF16_LE or $FO_UTF16_BE or $FO_UTF8 Or $FO_UTF8_NOBOM return binary now? Is a bug or feature?

#include 'FileConstants.au3'

$h = FileOpen('test.txt', $FO_OVERWRITE + $FO_UTF8_NOBOM)
FileWrite($h, 'ddddddddddddd')
FileClose($h)

test(0)
test($FO_BINARY)
test($FO_UTF16_LE)
test($FO_UTF16_BE)
test($FO_UTF8)
test($FO_UTF8_NOBOM)
test($FO_UTF8_FULL)

Func test($FO)
  $h = FileOpen('test.txt', $FO_READ + $FO)
  $data = FileRead($h)
  FileClose($h)
  ConsoleWrite($data & @CRLF)
EndFunc

In console:

ddddddddddddd
0x64646464646464646464646464
0x6464646464646464646464
0x6464646464646464646464
0x64646464646464646464
0x64646464646464646464646464
ddddddddddddd

[Iczer]

hmm... considering no one answered to previous post for over a week, it seems like global conspiracy

[JohnOne]

I'l go with bug, features are normally documented.

[jchd]

UTF8 w/o BOM is nothing but ANSI since the content is all below 0x80.

$h = FileOpen('test.txt', $FO_OVERWRITE + $FO_UTF8_NOBOM)
FileWrite($h, 'ddddddddddddd')
FileClose($h)

;                                   result from beta
test(0)                 ; 0         ANSI, correct
test($FO_BINARY)        ; 16        correct
test($FO_UTF16_LE)      ; 32        questionable: no valid BOM found (eats first 2 bytes)
test($FO_UTF16_BE)      ; 64        questionable: no valid BOM found (eats first 2 bytes)
test($FO_UTF8)          ; 128       questionable: no valid BOM found (eats first 3 bytes)
test($FO_UTF8_NOBOM)    ; 256       wrong
test($FO_UTF8_FULL)     ; 16384     correct

Func test($FO)
  $h = FileOpen('test.txt', $FO_READ + $FO)
  $data = FileRead($h)
  ConsoleWrite($FO & @TAB & '--> ' & $data & @CRLF)
  FileClose($h)
EndFunc

Beta returns:

0   --> ddddddddddddd
16  --> 0x64646464646464646464646464
32  --> 0x6464646464646464646464
64  --> 0x6464646464646464646464
128 --> 0x64646464646464646464
256 --> 0x64646464646464646464646464
16384   --> ddddddddddddd

Release returns:

0   --> ddddddddddddd
16  --> 0x64646464646464646464646464
32  --> ??????
64  --> ??????
128 --> ddddddddddddd
256 --> ddddddddddddd
16384   --> ddddddddddddd

which is correct in every case. The recent "fix" in read modes isn't correct.

[jaberwacky]

When I use With / EndWith in this function it works fine until I rearrange some cases.  I can't make a reproducer because I have no idea how to in this case.

; Works fine

Func controller_main_gui_messages(Const $this)
  Local Const $message = GUIGetMsg()

  With $this
    If Not .GUIMessages($message) Then 
      Return False
    EndIf
    
    If Not .ActionMessages($message) Then 
      Return False
    EndIf
      
    If Not .VersionsFileMenu($message) Then 
      Return False
    EndIf
      
    If Not .MainTabActions($message) Then 
      Return False
    EndIf
  EndWith

  Return True
EndFunc

; doesn't work

Func controller_main_gui_messages(Const $this)
  Local Const $message = GUIGetMsg()

  With $this
    If Not .MainTabActions($message) Then 
      Return False
    EndIf
    
    If Not .GUIMessages($message) Then ; Error: (115) : Unknown name.
      Return False
    EndIf
    
    If Not .ActionMessages($message) Then 
      Return False
    EndIf
      
    If Not .VersionsFileMenu($message) Then 
      Return False
    EndIf
  EndWith

  Return True
EndFunc

The full code for this is SciTE Customization GUI in my signature.  That code is kinda large but I don't think it's my code though. 

Anyways, I know you can't do anything without a reproducer.  I thought I'd put this out there because I discovered that order seems to have a play in the issue.

Well, kthxbye.

Edited September 22, 2014 by jaberwacky

[RichardL]

In String.au3 the function _StringEncrypt has gone, but the name is still in the #CURRENT#

...

; _StringBetween
; _StringEncrypt
; _StringExplode
...