|
' Licensed to the .NET Foundation under one or more agreements.
' The .NET Foundation licenses this file to you under the MIT license.
' See the LICENSE file in the project root for more information.
Imports System.Collections.Generic
Imports Microsoft.CodeAnalysis.Text
Imports Microsoft.CodeAnalysis.VisualBasic.Symbols
Imports Microsoft.CodeAnalysis.VisualBasic.Syntax
Namespace Microsoft.CodeAnalysis.VisualBasic
''' <summary>
''' This binder is for binding the initializer of an implicitly typed
''' local variable. While binding an implicitly typed local variable
''' this binder is used to break cycles.
''' </summary>
Friend NotInheritable Class LocalInProgressBinder
Inherits Binder
' In certain scenarios we might find ourselves in loops, like
'
' dim x = y
' dim y = M(x)
'
' We break the cycle by ensuring that an initializer which illegally refers
' forwards to an in-scope local does not attempt to work out the type of the
' forward local. However, just to make sure, we also keep track of every
' local whose type we are attempting to infer. (This might be necessary for
' "script class" scenarios where local vars are actually fields.)
Private ReadOnly _symbols As ConsList(Of LocalSymbol)
Public Sub New(containingBinder As Binder, symbol As LocalSymbol)
MyBase.New(containingBinder)
Me._symbols = New ConsList(Of LocalSymbol)(symbol, containingBinder.ImplicitlyTypedLocalsBeingBound)
End Sub
Public Overrides ReadOnly Property ImplicitlyTypedLocalsBeingBound As ConsList(Of LocalSymbol)
Get
Return Me._symbols
End Get
End Property
End Class
End Namespace
|