Warning for observation APIs when used with inhabitable types & promoteValue.
#429
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andersio
changed the title
promoteValue.
mdiep
reviewed
Jun 6, 2017
| Signal<Never, NoError>.never.flatMapError { _ in SignalProducer<Never, AnyError>.empty } | ||
| Signal<Never, NoError>.never.flatMapError { _ in SignalProducer<Never, NoError>.empty } | ||
| } | ||
| */ |
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Just a bunch of test cases to verify these combinations would emit the error message. Moving them to the spec would flood the IDE with warnings, so I just commented them out. 🤦♂️
mdiep
approved these changes
Jun 7, 2017
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Just needs a changelog entry or two. |
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I think it needs better error message to tell that ignoring the error message would trap at runtime & also fill in the blanks for |
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@mdiep Please check. The error message are written in reduced written register btw, following the swift stdlib style. |
mdiep
approved these changes
Jun 8, 2017
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Raise warnings when using observation API or operators that is essentially a logic error due to
ValueorErrorbeing an inhabitable type. Please refer toInhabitableTypeGuards.swiftfor the lists of affected operators.Also note that these overloads cannot be marked as
unavailableorobsolete, or otherwise the regular version would take precedence over this.Checklist