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Type inference doesn't pick up the "as" operator #9949

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#16963
Closed
Type inference doesn't pick up the "as" operator#9949
#16963
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Issue-Enhancementthe issue is more of a feature request than a bugthe issue is more of a feature request than a bugResolution-FixedThe issue is fixed.The issue is fixed.WG-Interactive-IntelliSensetab completiontab completion
@SeeminglyScience

Description

@SeeminglyScience
SeeminglyScience
opened on Jun 19, 2019
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Steps to reproduce

$script = '([ICloneable]$var).'
(TabExpansion2 -inputScript $script -cursorColumn $script.Length).CompletionMatches
$script = '($var -as [ICloneable]).'
(TabExpansion2 -inputScript $script -cursorColumn $script.Length).CompletionMatches

Expected behavior

Both completions include the clone method.

CompletionText ListItemText ResultType ToolTip
-------------- ------------ ---------- -------
Clone(         Clone            Method System.Object ICloneable.Clone()
Clone(         Clone            Method System.Object ICloneable.Clone()

Actual behavior

Only the explicit cast includes the clone method.

CompletionText ListItemText ResultType ToolTip
-------------- ------------ ---------- -------
Clone(         Clone            Method System.Object ICloneable.Clone()

Environment data

Name                           Value
----                           -----
PSVersion                      7.0.0-preview.1
PSEdition                      Core
GitCommitId                    7.0.0-preview.1
OS                             Microsoft Windows 10.0.18362
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

This also repros on all previous versions of PowerShell. On the fence about calling this a bug vs an enhancement, so use whichever tag you'd like I suppose.

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    Issue-Enhancementthe issue is more of a feature request than a bugthe issue is more of a feature request than a bugResolution-FixedThe issue is fixed.The issue is fixed.WG-Interactive-IntelliSensetab completiontab completion

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