passing custom object to another ps1 script - powershell

Question

I'd like to pass a custom made object from script to another.
Beginning of subscript.ps1 there are input parameters:
param(
[string]$someString,
[object]$custClassData
)
In the main.ps1 I'm trying to call the subscript.ps1 after introducing a custom object:
class custClass{
[string]$string1
[string]$string2
[string]$string3
}
$customizedObject = [custClass]::new()
$customizedObject.string1 = "smthng1"
$customizedObject.string2 = "smthng2"
$customizedObject.string3 = "smthng3"
$scriptPath = ".\subscript.ps1"
$smString = "somethingsomething"
powershell.exe -file $scriptPath -someString $smString -custClassData $customizedObject
When calling like this if i check in subscript $custClassData.GetType it returns System.String, so i only get the name of the object there. If I generate class and object in the powershell manually and put data there and pass it to the subscript the type is custClass.

Answer 1

In subscript.ps1 the $custClassData parameter needs to validate the type [CustClass] not [object]. So something like:
param(
[string]$someString,
[CustClass]$custClassData
)
This way the data that is passed to that parameter must be of the type [CustClass].
Additionally, the way you are calling subscript.ps1 does not look correct. You do not need to call powershell.exe in order to invoke subscript.ps1. powershell.exe will always throw an error here.
You should change subscript.ps1 to subscript.psm1, and turn the contents of the script into a function, and use it like this:
In subscript.psm1:
function Do-TheNeedful {
param(
[string]$someString,
[CustClass]$custClassData
)
#~
# do work
#~
}
In main.ps1
class custClass{
[string]$string1
[string]$string2
[string]$string3
}
Import-Module subscript.psm1
$customizedObject = [custClass]::new()
$customizedObject.string1 = "smthng1"
$customizedObject.string2 = "smthng2"
$customizedObject.string3 = "smthng3"
Do-TheNeedful -someString "a_string" -custClassData $customizedObject

Answer 2

Calling powershell.exe casts everything to strings. Launch the script file directly instead:
File: sub.ps1
param(
[object]$foo
)
$foo
File: main.ps1
class myClass{
[string]$A
}
$myObject = [myClass]::new()
$myObject.A = "BAR"
.\sub.ps1 $myObject