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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
Imports System.Composition
Imports System.Diagnostics.CodeAnalysis
Imports System.Threading
Imports Microsoft.CodeAnalysis.CodeActions
Imports Microsoft.CodeAnalysis.CodeRefactorings
Imports Microsoft.CodeAnalysis.IntroduceVariable
Imports Microsoft.CodeAnalysis.Text
Imports Microsoft.CodeAnalysis.VisualBasic.Syntax
Namespace Microsoft.CodeAnalysis.VisualBasic.IntroduceVariable
<ExportCodeRefactoringProvider(LanguageNames.VisualBasic, Name:=PredefinedCodeRefactoringProviderNames.IntroduceLocalForExpression), [Shared]>
Friend Class VisualBasicIntroduceLocalForExpressionCodeRefactoringProvider
Inherits AbstractIntroduceLocalForExpressionCodeRefactoringProvider(Of
ExpressionSyntax,
StatementSyntax,
ExpressionStatementSyntax,
LocalDeclarationStatementSyntax)
<ImportingConstructor>
<SuppressMessage("RoslynDiagnosticsReliability", "RS0033:Importing constructor should be [Obsolete]", Justification:="Used in test code: https://github.com/dotnet/roslyn/issues/42814")>
Public Sub New()
End Sub
Protected Overrides Function IsValid(expressionStatement As ExpressionStatementSyntax, span As TextSpan) As Boolean
' Expression is likely too simple to want to offer to generate a local for.
' This leads to too many false cases where this is offered.
If span.IsEmpty AndAlso expressionStatement.Expression.IsKind(SyntaxKind.IdentifierName) Then
Return False
End If
Return True
End Function
Protected Overrides Function FixupLocalDeclaration(expressionStatement As ExpressionStatementSyntax, localDeclaration As LocalDeclarationStatementSyntax) As LocalDeclarationStatementSyntax
' Don't want an 'as clause' in our local decl. it's idiomatic already to
' just do `dim x = new DateTime()`
Return localDeclaration.RemoveNode(
localDeclaration.Declarators(0).AsClause,
SyntaxRemoveOptions.KeepUnbalancedDirectives Or SyntaxRemoveOptions.AddElasticMarker)
End Function
Protected Overrides Function FixupDeconstruction(expressionStatement As ExpressionStatementSyntax, localDeclaration As ExpressionStatementSyntax) As ExpressionStatementSyntax
Throw ExceptionUtilities.Unreachable()
End Function
Protected Overrides Function CreateTupleDeconstructionAsync(document As Document, tupleType As INamedTypeSymbol, expression As ExpressionSyntax, cancellationToken As CancellationToken) As Task(Of ExpressionStatementSyntax)
Throw New NotImplementedException()
End Function
End Class
End Namespace
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