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src/Compilers/VisualBasic/Portable/Lowering/LocalRewriter/LocalRewriter_OmittedArgument.vb
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AlekseyTs
Merge remote-tracking branch 'dotnet/master' into UsedAssemblies_13
24 янв 2020, 03:48
24 янв 2020, 03:48
5f06615
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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.Diagnostics Imports System.Runtime.InteropServices Imports Microsoft.CodeAnalysis.Text Imports Microsoft.CodeAnalysis.VisualBasic.Symbols Imports Microsoft.CodeAnalysis.VisualBasic.Syntax Imports TypeKind = Microsoft.CodeAnalysis.TypeKind Namespace Microsoft.CodeAnalysis.VisualBasic Partial Friend NotInheritable Class LocalRewriter Public Overrides Function VisitOmittedArgument(node As BoundOmittedArgument) As BoundNode Debug.Assert(node.Type.IsObjectType) Dim missingField As FieldSymbol = Nothing If Not TryGetWellknownMember(missingField, WellKnownMember.System_Reflection_Missing__Value, node.Syntax) Then Return node End If Dim fieldAccess = New BoundFieldAccess(node.Syntax, Nothing, missingField, isLValue:=False, type:=missingField.Type) Dim useSiteInfo = GetNewCompoundUseSiteInfo() Dim conversion = Conversions.ClassifyDirectCastConversion(fieldAccess.Type, node.Type, useSiteInfo) _diagnostics.Add(node, useSiteInfo) ' Return Directcast(Missing.Value, Object) Return New BoundDirectCast(node.Syntax, fieldAccess, conversion, node.Type) End Function End Class End Namespace