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aleeksunder

How to wrap a function with optional parameters?

3 posts in this topic

Hello!

I'm a newbie in AutoIt and want to wrap some internal autoit functions like RegWrite() in way function will display MsgBox with of error happens.

I want to wrap because write error handler becomes really annoying when it comes to code, and I have to write the same code after every RegWrite() call and this becomes really ugly. So I just want this:

Local $s_key        = 'HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control'
Local $s_value_name = 'value1'
Local $s_value_type = 'REG_SZ'
Local $value_data   = 'data1'

RegWrite( $s_key , $s_value_name , $s_value_type, $value_data )

If @error Then
    MsgBox( $MB_ICONERROR , 'ERROR' , 'Error writing registry:' & @CRLF & 'Key: ' & $s_key & @CRLF & 'Value: ' & $s_value_name & @CRLF & 'Type: ' & $s_value_type & @CRLF & 'Data: ' & $value_data & @CRLF & 'ErrorCode: ' & @error )
EndIf


Local $s_key = 'HKEY_CURRENT_USER\Software\MyApp'

RegWrite( $s_key )

If @error Then
    MsgBox( $MB_ICONERROR , 'ERROR' , 'Error writing registry:' & @CRLF & 'Key: ' & $s_key & 'ErrorCode: ' & @error )
EndIf

Becomes into this:

RegistryWrite( 'HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control' , 'value1' , 'REG_SZ' , 'data1' )
RegistryWrite( 'HKEY_CURRENT_USER\Software\MyApp' )

Func RegistryWrite( $s_key , $s_value_name = NULL , $s_value_type = NULL , $value_data = NULL )

    RegWrite( $s_key , $s_value_name , $s_value_type, $value_data )

    If @error Then

        MsgBox( $MB_ICONERROR , 'ERROR' , 'Error writing registry:' & @CRLF & 'Key: ' & $s_key & @CRLF & 'Value: ' & $s_value_name & @CRLF & 'Type: ' & $s_value_type & @CRLF & 'Data: ' & $value_data & @CRLF & 'ErrorCode: ' & @error )

    EndIf

EndFunc

And I'm just confused how to properly pass the optional parameters to target function as documentation says that NULL can be evaluated as 0 in mathematical expressions. Maybe "Default" or something else is more suitable?

I undersand that I can write separate wrappers for each number of arguments or handle each optional argument value and call target function with exact arguments number, but the goal is to keep code as clean and as simple as possible.

So i have two questions:

1. What is the _proper_ and maybe universal way to pass optional parameters to wrapped functions?

2. Can I achive the same result without wrapping every function? Maybe some AutoIt execution flags to always popup a error that happens and stop execution?

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1. Use the default keyword

2. No there isn't

1 person likes this

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Updated: 04/09/2015

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Nice!

Thanks a lot ;)

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