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src/Compilers/VisualBasic/Portable/Binding/SymbolsInProgress.vb
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AlekseyTs
Improve cycle detection while evaluating values of a constant fields (#50169)
05 янв 2021, 01:48
Не верифицирован
05 янв 2021, 01:48
c8decf6
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' 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.Immutable Namespace Microsoft.CodeAnalysis.VisualBasic ''' <summary> ''' This is used while computing the values of constant symbols. Since they can depend on each other, ''' we need to keep track of which ones we are currently computing in order to avoid (and report) cycles. ''' </summary> Friend NotInheritable Class SymbolsInProgress(Of T As Symbol) Private ReadOnly _symbols As ImmutableSetWithInsertionOrder(Of T) Friend Shared ReadOnly Empty As SymbolsInProgress(Of T) = New SymbolsInProgress(Of T)(ImmutableSetWithInsertionOrder(Of T).Empty) Private Sub New(fields As ImmutableSetWithInsertionOrder(Of T)) Me._symbols = fields End Sub Friend Function Add(symbol As T) As SymbolsInProgress(Of T) Debug.Assert(symbol IsNot Nothing) Return New SymbolsInProgress(Of T)(Me._symbols.Add(symbol)) End Function Friend Function Contains(symbol As T) As Boolean Return _symbols.Contains(symbol) End Function End Class End Namespace