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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.Threading
Imports Microsoft.CodeAnalysis.Diagnostics
Imports Microsoft.CodeAnalysis.RemoveUnnecessaryCast
Imports Microsoft.CodeAnalysis.Text
Imports Microsoft.CodeAnalysis.VisualBasic.Syntax
Namespace Microsoft.CodeAnalysis.VisualBasic.RemoveUnnecessaryCast
<DiagnosticAnalyzer(LanguageNames.VisualBasic)>
Friend NotInheritable Class VisualBasicRemoveUnnecessaryCastDiagnosticAnalyzer
Inherits AbstractRemoveUnnecessaryCastDiagnosticAnalyzer(Of SyntaxKind, ExpressionSyntax)
Protected Overrides ReadOnly Property SyntaxKindsOfInterest As ImmutableArray(Of SyntaxKind) =
ImmutableArray.Create(SyntaxKind.CTypeExpression,
SyntaxKind.DirectCastExpression,
SyntaxKind.TryCastExpression,
SyntaxKind.PredefinedCastExpression)
Protected Overrides Function IsUnnecessaryCast(model As SemanticModel, node As ExpressionSyntax, cancellationToken As CancellationToken) As Boolean
Select Case node.Kind
Case SyntaxKind.CTypeExpression, SyntaxKind.DirectCastExpression, SyntaxKind.TryCastExpression
Return DirectCast(node, CastExpressionSyntax).IsUnnecessaryCast(model, assumeCallKeyword:=True, cancellationToken:=cancellationToken)
Case SyntaxKind.PredefinedCastExpression
Return DirectCast(node, PredefinedCastExpressionSyntax).IsUnnecessaryCast(model, assumeCallKeyword:=True, cancellationToken:=cancellationToken)
Case Else
Throw ExceptionUtilities.UnexpectedValue(node.Kind)
End Select
End Function
Protected Overrides Function GetFadeSpan(node As ExpressionSyntax) As TextSpan
Return node.GetFirstToken().Span
End Function
End Class
End Namespace
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