Completion for parameter aliases

[sharpchen]

Prerequisites

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Summary

It appears that it does not provide prompt for parameter aliases such as -Target as an alias for -Value in New-Item command.

Proposed Design

No response

[MartinGC94]

The completion values comes from PowerShell itself and it intentionally leaves out parameter aliases if the real parameter is available in the completion result list. If you type in New-Item -T<Tab> you should get Target as one of the available options.

The idea behind this design is simple: It declutters the completion result list and it encourages the use of the real parameter names. Why do you want to use the alias over the real value?

[sharpchen]

I just think it should be available anyway. Sometimes alias is more readable such as when you create a symlink with -Target instead of -Value. And I wonder how could I do -T<Tab> in neovim, is it builtin for vscode extension or ISE? I'm not familiar with lsp, I guess it should be a trigger character or something?

[MartinGC94]

<Tab> represents hitting the tab key to tab complete the text. So whatever method you use to trigger completions in neovim should be triggered after you've typed -T.

[sharpchen]

Yeah, there's no -Target in the list when after -T so I thought maybe I missed something

[MartinGC94]

PS C:\> (TabExpansion2 'New-Item -t').CompletionMatches

CompletionText ListItemText    ResultType ToolTip
-------------- ------------    ---------- -------
-Type          Type         ParameterName [string] Type
-Target        Target       ParameterName [Object] Target

PS C:\>

Most likely the completion request is triggered by neovim when you type - and then it filters the results locally, which would give you this:

PS C:\> (TabExpansion2 'New-Item -').CompletionMatches

CompletionText       ListItemText           ResultType ToolTip
--------------       ------------           ---------- -------
-Path                Path                ParameterName [string[]] Path
-Name                Name                ParameterName [string] Name
-ItemType            ItemType            ParameterName [string] ItemType
-Value               Value               ParameterName [Object] Value
-Force               Force               ParameterName [switch] Force
-Credential          Credential          ParameterName [pscredential] Credential
-WhatIf              WhatIf              ParameterName [switch] WhatIf
-Confirm             Confirm             ParameterName [switch] Confirm
-Verbose             Verbose             ParameterName [switch] Verbose
-Debug               Debug               ParameterName [switch] Debug
-ErrorAction         ErrorAction         ParameterName [ActionPreference] ErrorAction
-WarningAction       WarningAction       ParameterName [ActionPreference] WarningAction
-InformationAction   InformationAction   ParameterName [ActionPreference] InformationAction
-ProgressAction      ProgressAction      ParameterName [ActionPreference] ProgressAction
-ErrorVariable       ErrorVariable       ParameterName [string] ErrorVariable
-WarningVariable     WarningVariable     ParameterName [string] WarningVariable
-InformationVariable InformationVariable ParameterName [string] InformationVariable
-OutVariable         OutVariable         ParameterName [string] OutVariable
-OutBuffer           OutBuffer           ParameterName [int] OutBuffer
-PipelineVariable    PipelineVariable    ParameterName [string] PipelineVariable

PS C:\>