Support unloaded enums and classes in Intellisense

VSCode Version: 1.40.1 OS Version: Windows 10, 1903 Powershell Extension: 2019.11.0

Steps to Reproduce:

Create an Enum Create a function which references that Enum as a parameter. Call that function, there will be no autosense when populating the parameters and values for said function.

Simple Example

Enum AzureSqlEdition
{
Standard
Premium
Basic
}

function functAutoSenseBroke
{
param
(
[Parameter(Mandatory=$True)][AzureSqlEdition]$DbType,
[Parameter(Mandatory=$True)][string]$OtherParameter
)
Write-Host $DbType
Write-Host $OtherParameter
}

function functAutoSenseWorks
{
param ( [Parameter(Mandatory=$True)][string]$DbType )
Write-Host $DbType
}
#works but no autosense
functAutoSenseBroke -DbType ([AzureSqlEdition]::Standard) -OtherParameter "other"

#Simple Function, no Enum, autosense works, for comparison purposes
functAutoSenseWorks -DbType "test"

[SeeminglyScience]

Yeah completion acts differently when the source is also in the text it’s trying to complete for. If you:

1. Copy the whole script
2. Paste it into a PSReadLine prompt without hitting enter or running any of the lines
3. Put your cursor on the same spot and press tab

Then it’ll probably act same. A very similar issue is PowerShell/PowerShell#10567. This is something that needs to be corrected in PowerShell itself (the engine provides the API that does all of vscode-powershell’s completions)

[SydneyhSmith]

Closing as an external fix in PowerShell https://github.com/PowerShell/PowerShell/issues/12079