mut is accepted before constants in patterns

This compiles on stable/beta/nightly and C is resolved as a constant and not a new binding.

const C: u8 = 0;

fn main() {
    match 1u8 {
        mut C => {}
        _ => {}
    }
}

It doesn't match though: https://is.gd/ylHuUv

@durka

@durka The example matches on 1, while C is 0, so of course it doesn't match. Conversely, match 0u8 correctly takes the C arm, and the generated code looks good too. It seems the mut is simply ignored.

Auto merge of #34095 - petrochenkov:pathir2, r=jseyfried

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`mut` is accepted before constants in patterns #34047

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mut is accepted before constants in patterns #34047

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durka commented on Jun 2, 2016

hanna-kruppe commented on Jun 2, 2016

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`mut` is accepted before constants in patterns #34047