f95d517a7c
Update rule content and descriptions to LaYC format. https://sonarsource.github.io/rspec/#/rspec/S4586 ## Review A dedicated reviewer checked the rule description successfully for: - [ ] logical errors and incorrect information - [ ] information gaps and missing content - [ ] text style and tone - [ ] PR summary and labels follow [the guidelines](https://github.com/SonarSource/rspec/#to-modify-an-existing-rule)
48 lines
1.2 KiB
Plaintext
48 lines
1.2 KiB
Plaintext
:keyword_null: Nothing
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:keyword_async: Async
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:concept_method: procedure
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:typeparameter_TResult: (Of TResult)
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== Why is this an issue?
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include::../why-dotnet.adoc[]
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[source,vbnet,diff-id=1,diff-type=noncompliant]
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----
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Public Function DoFooAsync() As Task
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Return Nothing ' Noncompliant: Causes a NullReferenceException if awaited.
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End Function
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Public Async Function Main() As Task
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Await DoFooAsync() ' NullReferenceException
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End Function
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----
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[source,vbnet,diff-id=1,diff-type=compliant]
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----
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Public Function DoFooAsync() As Task
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Return Task.CompletedTask ' Compliant: Method can be awaited.
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End Function
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Public Async Function Main() As Task
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Await DoFooAsync()
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End Function
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----
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[source,vbnet,diff-id=2,diff-type=noncompliant]
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----
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Public Function GetFooAsync() As Task(Of Object)
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Return Nothing ' Noncompliant: Causes a NullReferenceException if awaited.
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End Function
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----
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[source,vbnet,diff-id=2,diff-type=compliant]
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----
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Public Function GetFooAsync() As Task(Of Object)
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Return Task.FromResult(Of Object)(Nothing) ' Compliant: Method can be awaited.
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End Function
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----
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include::../resources.adoc[]
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include::../rspecator.adoc[] |