Type inference does not handle index of IList<> #15811
Description
Steps to reproduce
$script = '([System.Collections.Generic.IList[System.Text.StringBuilder]]$null)[0].'
$results = TabExpansion2 -inputScript $script -cursorColumn $script.Length
$results.CompletionMatchesNote that changing IList to List in the above script will return the expected inferred members.
Expected behavior
CompletionText ListItemText ResultType ToolTip
-------------- ------------ ---------- -------
Capacity Capacity Property int Capacity { get; set; }
Length Length Property int Length { get; set; }
MaxCapacity MaxCapacity Property int MaxCapacity { get; }
Append( Append Method System.Text.StringBuilder Append(System.Char*, System.Private.CoreLib, Version=6.0.0.0, Culture=…
AppendFormat( AppendFormat Method System.Text.StringBuilder AppendFormat(string format, System.Object arg0)…
AppendJoin( AppendJoin Method System.Text.StringBuilder AppendJoin(string separator, Params System.Object[] values)…
AppendLine( AppendLine Method System.Text.StringBuilder AppendLine()…
Clear( Clear Method System.Text.StringBuilder Clear()
CopyTo( CopyTo Method void CopyTo(int sourceIndex, char[] destination, int destinationIndex, int count)…
EnsureCapacity( EnsureCapacity Method int EnsureCapacity(int capacity)
Equals( Equals Method bool Equals(System.Text.StringBuilder sb)…
GetChunks( GetChunks Method System.Text.StringBuilder+ChunkEnumerator GetChunks()
GetHashCode( GetHashCode Method int GetHashCode()
GetObjectData( GetObjectData Method void ISerializable.GetObjectData(System.Runtime.Serialization.SerializationInfo info, System.Run…
GetType( GetType Method type GetType()
Insert( Insert Method System.Text.StringBuilder Insert(int index, ulong value)…
Remove( Remove Method System.Text.StringBuilder Remove(int startIndex, int length)
Replace( Replace Method System.Text.StringBuilder Replace(string oldValue, string newValue)…
ToString( ToString Method string ToString()…Actual behavior
CompletionText ListItemText ResultType ToolTip
-------------- ------------ ---------- -------
Count Count Property int Count { get; }
IsReadOnly IsReadOnly Property bool IsReadOnly { get; }
Add( Add Method void ICollection[StringBuilder].Add(System.Text.StringBuilder item)
Clear( Clear Method void ICollection[StringBuilder].Clear()
Contains( Contains Method bool ICollection[StringBuilder].Contains(System.Text.StringBuilder item)
CopyTo( CopyTo Method void ICollection[StringBuilder].CopyTo(System.Text.StringBuilder[] array, int arrayIndex)
ForEach( ForEach Method ForEach(expression [, arguments...])
GetEnumerator( GetEnumerator Method System.Collections.Generic.IEnumerator[System.Text.StringBuilder] IEnumerable[StringBuilder].GetEnumerator()…
IndexOf( IndexOf Method int IList[StringBuilder].IndexOf(System.Text.StringBuilder item)
Insert( Insert Method void IList[StringBuilder].Insert(int index, System.Text.StringBuilder item)
Remove( Remove Method bool ICollection[StringBuilder].Remove(System.Text.StringBuilder item)
RemoveAt( RemoveAt Method void IList[StringBuilder].RemoveAt(int index)
Where( Where Method Where({ expression } [, mode [, numberToReturn]])Environment data
Name Value
---- -----
PSVersion 7.2.0-preview.7
PSEdition Core
GitCommitId 7.2.0-preview.7
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