René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"-as operator does not recognize System.Management.Automation.PSCustomObject instances as such","articleBody":"\u003csup\u003eRelated: #5579\u003c/sup\u003e\r\n\r\nSteps to reproduce\r\n------------------\r\n\r\n```powershell\r\n# Create a [System.Management.Automation.PSCustomObject]\r\n# Note that you cannot create a System.Management.Automation.PSCustomObject\r\n# instance with `New-Object System.Management.Automation.PSCustomObject ...`.\r\n# [pscustomobject] is actually [psobject] ([System.Management.Automation.PSObject])\r\n$co = [pscustomobject] @{ foo = 'bar' }\r\n\r\n$co.GetType().FullName\r\n\r\n'---'\r\n\r\n# This should be and is $True.\r\n# Note that using `-is [pscustomobject]` is NOT equivalent and while it also returns $True,\r\n# it does so for any object that has an (invisible) extra [psobject] wrapper, due to the identity\r\n# of [pscustomobject] and [psobject]. All objects returned from *cmdlets* have that extra\r\n# wrapper; e.g., `(Get-Item /) -is [pscustomobject]` yields $True also, while the seemingly\r\n# equivalent  `[System.IO.DirectoryInfo]::new('/') -is [pscustomobject]`  doesn't - see #5579\r\n$co -is [System.Management.Automation.PSCustomObject]\r\n\r\n'---'\r\n\r\n# The $co -as ... expression should effectively pass $co through, but doesn't.\r\n# Note that using `-as [pscustomobject]` is NOT equivalent - and pointless, because \r\n# it passes *any* object through, given that it is the same as `-as [psobject]`, which  is what ALL \r\n# objects in PowerShell are (semi-secretly) wrapped in.\r\n$null -ne ($co -as [System.Management.Automation.PSCustomObject])\r\n```\r\n\r\nExpected behavior\r\n-----------------\r\n\r\n```none\r\nSystem.Management.Automation.PSCustomObject\r\n---\r\nTrue\r\n---\r\nTrue\r\n```\r\n\r\nActual behavior\r\n---------------\r\n\r\n```none\r\nSystem.Management.Automation.PSCustomObject\r\n---\r\nTrue\r\n---\r\nFalse # !!\r\n```\r\n\r\nEnvironment data\r\n----------------\r\n\r\n```powershell\r\nPowerShell Core v6.0.0-beta.4 on macOS 10.12.5\r\nPowerShell Core v6.0.0-beta.4 on Ubuntu 16.04.2 LTS\r\nPowerShell Core v6.0.0-beta.4 on Microsoft Windows 10 Pro (64-bit; v10.0.15063)\r\nWindows PowerShell v5.1.15063.413 on Microsoft Windows 10 Pro (64-bit; v10.0.15063)\r\n```\r\n","author":{"url":"https://github.com/mklement0","@type":"Person","name":"mklement0"},"datePublished":"2017-07-25T19:02:49.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":24},"url":"https://github.com/4343/PowerShell/issues/4343"}