Closed
Description
Steps to reproduce
Class BaseClass : System.IComparable
{
[int] $Value
BaseClass([int] $v)
{
$this.Value = $v
}
[int] CompareTo($that)
{
If (-Not($that -is [BaseClass])) {
Throw "Not comparable!!"
}
return $this.Value - $that.Value
}
}
Class SubClassA : BaseClass
{
SubClassA([int] $v) : base($v)
{
}
}
Class SubClassB : BaseClass
{
SubClassB([int] $v) : base($v)
{
}
}
$base1 = [BaseClass]::new(1)
$base2 = [BaseClass]::new(2)
$subA1 = [SubClassA]::new(1)
$subB2 = [SubClassB]::new(2)
Write-Output ('$base1 -lt $base2 -> ' + ($base1 -lt $base2))
Write-Output ('$subA1 -lt $subB2 -> ' + (([BaseClass]$subA1) -lt ([BaseClass]$subB2)))Expected behavior
$base1 -lt $base2 -> True
$subA1 -lt $subB2 -> True
Actual behavior
$base1 -lt $base2 -> True
Could not compare "SubClassA" to "SubClassB". Error: "Cannot convert the "SubClassB" value of type "SubClassB" to type "SubClassA"."
Environment data
> $PSVersionTable
Name Value
---- -----
PSVersion 6.1.0-preview.2
PSEdition Core
GitCommitId v6.1.0-preview.2
OS Microsoft Windows 10.0.17134
Platform Win32NT
PSCompatibleVersions {1.0, 2.0, 3.0, 4.0...}
PSRemotingProtocolVersion 2.3
SerializationVersion 1.1.0.1
WSManStackVersion 3.0