Add support for while let#17733
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I suspect that this isn’t supposed to be so heavily based on |
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Hah, oi. headdesk |
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Subject line needs fixing. |
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Is there a specific reason this is an error? What if I want to do an infinite loop with destructuring?
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That's discussed in the RFC: https://github.com/rust-lang/rfcs/blob/master/active/0068-while-let.md#detailed-design
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Rebased onto current master |
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nit: Could you please make this a specific pattern, i.e.:
MatchNormal => span_err!(cx.tcx.sess, pat.span, E0001, "unreachable pattern")The set of variants of this particular enum probably won't grow in the near future but it's still good for clarity, I think.
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This is heavily based on
if let(#17634) by @jakub- and @kballardThis should close #17687