JSON UDF in pure AutoIt

[Yaerox]

2 minutes ago, Musashi said:

As far as I know, this UDF works with datatype Maps and therefore requires AutoIt version 3.3.16.1 or higher.

Thank you Sir!

[TheDcoder]

Or you can also use an older Beta version if needed.

[seangriffin]

Any reason for having $s_String as "ByRef" in _JSON_Parse ?

I have a use case for minimal script, and wish to embed the JSON string directly in the _JSON_Parse such as

$search = _JSON_Parse('{"name":"Sean"}')
$s_Type = $search.name

I took the "ByRef" keyword out of _JSON_Parse and seems to work?

[AspirinJunkie]

That had performance reasons. With a classic ByRef, large strings have to be duplicated when they are transferred. As the function also works recursively, this would take place several times and would have a corresponding impact on performance.

Important: “Would have”. In fact, AutoIt has quite obviously built in a kind of COW mechanism. This means that a copy is not created automatically, but only when the content is actually changed in the function. However, I do not know this with certainty but only deduce it from the performance behavior.

The important point is: ByRef has no (more?) influence on the performance of the _JSON_Parse() function.

So the recommendation would actually be to remove ByRef to enable direct string inputs.
Which I have just done myself and adapted the repository accordingly.

Edited April 1 by AspirinJunkie

[Nine]

Once you are confortable with your script, you can remove au3check (or compile, or run from Explorer) then you can use direct string even with ByRef.

#AutoIt3Wrapper_Run_Au3Check=n

Func Test(ByRef $sString)
  MsgBox(0, "Test", $sString)
EndFunc

Test("This is a test")

Meanwhile, you can fool au3check by having a wrapper of the original (included) function.  Since au3check is a single pass process, it won't detect if you use it like this :

Func Test(ByRef $sString)
  MsgBox(0, "Test", $sString)
EndFunc

TestEx("This is a test")

Func TestEx(ByRef $sString)
  Test($sString)
EndFunc

That way you still get the benefit of ByRef all the time...

Edited April 1 by Nine