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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
Namespace Microsoft.CodeAnalysis.VisualBasic.Completion.KeywordRecommenders.Statements
''' <summary>
''' Recommends the "While" keyword at the start of a statement. "While" as a part of a Do statement is handled in
''' the UntilAndWhileKeywordRecommender.
''' </summary>
Friend Class WhileLoopKeywordRecommender
Inherits AbstractKeywordRecommender
Protected Overrides Function RecommendKeywords(context As VisualBasicSyntaxContext, cancellationToken As CancellationToken) As ImmutableArray(Of RecommendedKeyword)
If context.IsMultiLineStatementContext Then
Return ImmutableArray.Create(New RecommendedKeyword("While", VBFeaturesResources.Runs_a_series_of_statements_as_long_as_a_given_condition_is_true))
End If
' Are we after Exit or Continue?
If context.FollowsEndOfStatement Then
Return ImmutableArray(Of RecommendedKeyword).Empty
End If
Dim targetToken = context.TargetToken
If targetToken.IsKind(SyntaxKind.ExitKeyword, SyntaxKind.ContinueKeyword) AndAlso
context.IsInStatementBlockOfKind(SyntaxKind.WhileBlock) AndAlso
Not context.IsInStatementBlockOfKind(SyntaxKind.FinallyBlock) Then
Return ImmutableArray.Create(New RecommendedKeyword("While",
If(targetToken.IsKind(SyntaxKind.ExitKeyword),
VBFeaturesResources.Exits_a_While_loop_and_transfers_execution_immediately_to_the_statement_following_the_End_While_statement,
VBFeaturesResources.Transfers_execution_immediately_to_the_next_iteration_of_the_While_loop)))
End If
Return ImmutableArray(Of RecommendedKeyword).Empty
End Function
End Class
End Namespace
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