#packed enum to u8 bytes?

1 messages · Page 1 of 1 (latest)

pine crane
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use @bitcast instead of @intFromEnum

green marten
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I cant get bitcast to work at all in an append() context.

pine crane
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is out an arraylist of u8s?
in that case why not just do try out.append(@truncate(@bitCast(self.parsing)))?
the & 0xFF is probably screwing up the result type and @truncate will already mask it for you

green marten
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Because I need all four u8's

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Oh, so like htis

green marten
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Wow, well this is unexpected:

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OMG, so this doesnt work either:

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Nor does this:

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Maybe an inline function is needed to mash out a u32 into u8's for an array.... hmmm...

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omg, this doesnt work either

var b: u8 = @as(u8, @bitCast(self.uid));
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src/form.zig:66:25: error: @bitCast size mismatch: destination type 'u8' has 8 bits but source type 'u32' has 32 bits
    var b: u8 = @as(u8, @bitCast(self.uid));
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Nor does this:

image.png
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Maybe @bitcast is not the answer for getting a u32 into u8's

pine crane
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I guess you'd do @truncate(@as(u32, @bitCast(self.parsing)))

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Which makes sense ig truncate doesn't provide a result type

green marten
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Thans, I finally worked it out after a lot of trial and error, heres how:

image.png