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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.Completion.Providers
Imports Microsoft.CodeAnalysis.VisualBasic.Extensions.ContextQuery
Imports Microsoft.CodeAnalysis.VisualBasic.Syntax
Namespace Microsoft.CodeAnalysis.VisualBasic.Completion.KeywordRecommenders.Declarations
''' <summary>
''' Recommends the "To" keyword in array bounds.
''' </summary>
Friend Class ToKeywordRecommender
Inherits AbstractKeywordRecommender
Private Shared ReadOnly s_keywords As ImmutableArray(Of RecommendedKeyword) =
ImmutableArray.Create(New RecommendedKeyword("To", VBFeaturesResources.Separates_the_beginning_and_ending_values_of_a_loop_counter_or_array_bounds_or_that_of_a_value_match_range))
Protected Overrides Function RecommendKeywords(context As VisualBasicSyntaxContext, cancellationToken As CancellationToken) As ImmutableArray(Of RecommendedKeyword)
If context.FollowsEndOfStatement Then
Return ImmutableArray(Of RecommendedKeyword).Empty
End If
Dim targetToken = context.TargetToken
Dim simpleArgument = targetToken.GetAncestor(Of SimpleArgumentSyntax)()
If simpleArgument IsNot Nothing Then
Dim modifiedIdentifier = targetToken.GetAncestor(Of ModifiedIdentifierSyntax)()
If modifiedIdentifier IsNot Nothing Then
If modifiedIdentifier.ArrayBounds IsNot Nothing AndAlso
modifiedIdentifier.ArrayBounds.Arguments.Contains(simpleArgument) Then
Return s_keywords
End If
End If
' For ReDim, this will be a ReDim clause.
Dim clause = targetToken.GetAncestor(Of RedimClauseSyntax)()
If clause IsNot Nothing Then
Dim redimStatement = targetToken.GetAncestor(Of ReDimStatementSyntax)()
If redimStatement IsNot Nothing Then
If redimStatement.Clauses.Contains(clause) Then
Return s_keywords
End If
End If
End If
End If
Return ImmutableArray(Of RecommendedKeyword).Empty
End Function
End Class
End Namespace
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