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ChangeRefCellDerefToNotExpression.fs
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ChangeRefCellDerefToNotExpression.fs
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// Copyright (c) Microsoft Corporation. All Rights Reserved. See License.txt in the project root for license information.
namespace Microsoft.VisualStudio.FSharp.Editor
open System.Composition
open System.Threading.Tasks
open Microsoft.CodeAnalysis.Text
open Microsoft.CodeAnalysis.CodeFixes
[<ExportCodeFixProvider(FSharpConstants.FSharpLanguageName, Name = "ChangeRefCellDerefToNotExpression"); Shared>]
type internal FSharpChangeRefCellDerefToNotExpressionCodeFixProvider
[<ImportingConstructor>]
(
checkerProvider: FSharpCheckerProvider,
projectInfoManager: FSharpProjectOptionsManager
) =
inherit CodeFixProvider()
static let userOpName = "FSharpChangeRefCellDerefToNotExpressionCodeFix"
let fixableDiagnosticIds = set ["FS0001"]
override __.FixableDiagnosticIds = Seq.toImmutableArray fixableDiagnosticIds
override this.RegisterCodeFixesAsync context : Task =
asyncMaybe {
let document = context.Document
let! parsingOptions, _ = projectInfoManager.TryGetOptionsForEditingDocumentOrProject(document, context.CancellationToken, userOpName)
let! sourceText = context.Document.GetTextAsync(context.CancellationToken)
let! parseResults = checkerProvider.Checker.ParseFile(document.FilePath, sourceText.ToFSharpSourceText(), parsingOptions, userOpName) |> liftAsync
let errorRange = RoslynHelpers.TextSpanToFSharpRange(document.FilePath, context.Span, sourceText)
let! derefRange = parseResults.TryRangeOfRefCellDereferenceContainingPos errorRange.Start
let! derefSpan = RoslynHelpers.TryFSharpRangeToTextSpan(sourceText, derefRange)
let title = SR.UseNotForNegation()
let diagnostics =
context.Diagnostics
|> Seq.filter (fun x -> fixableDiagnosticIds |> Set.contains x.Id)
|> Seq.toImmutableArray
let codeFix =
CodeFixHelpers.createTextChangeCodeFix(
title,
context,
(fun () -> asyncMaybe.Return [| TextChange(derefSpan, "not ") |]))
context.RegisterCodeFix(codeFix, diagnostics)
}
|> Async.Ignore
|> RoslynHelpers.StartAsyncUnitAsTask(context.CancellationToken)