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Allow matchGuards in expression position with ?(...) #483

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Allow matchGuards in expression position with ?(...) #483

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marzipankaiser
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Proof-of-concept implementation of #481 with the syntax ?(x is p).

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Wouldn't it be also an alternative to support negated guards (that is not negated patterns in general, but only guards)?

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Depends on what exactly you mean by negated guards. The common usecase would be something like x is not Some("..."),
which I'd say is a negated pattern?
Guards which are not patterns (is), in my understanding, are boolean expressions and could already be negated, no?

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@marzipankaiser @b-studios