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cmd/compile: remove Type.Vargen #19878

josharian opened this issue Apr 7, 2017 · 2 comments


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@josharian josharian commented Apr 7, 2017

The only place that Type.Vargen is written is in typechecking, where is it set with t.Vargen = n.Name.Vargen. A few lines later, we also provide t with a reference to n: t.Nod = asTypesNode(n). So Type.Vargen could be implemented as a lazy lookup of t.Nod.Name.Vargen, defaulting to zero if t.Nod or t.Nod.Name are nil.

I'd send a CL, but amusingly, yesterday's refactoring made it more difficult, because Nod fields are now inaccessible from Types. If we switch to using (say) an interface for Type.Nod, then the Node Vargen lookup could become part of that interface. Conveniently, removing Type.Vargen would almost pay for that, size-wise.

cc @mdempsky @griesemer


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@griesemer griesemer commented Apr 7, 2017

Apologies for making things more difficult. Hopefully this is temporary. To a large extent, types, symbols, and scopes (dclstack etc) should be able to stand alone, which hopefully should allow significant disentanglements in the long run. In the short run, things are a bit ugly.


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@josharian josharian commented Apr 7, 2017

Apologies for making things more difficult.

No worries. All in the name of progress. :) I'm sure my incessant ongoing refactoring of the last weeks has caused no shortage of rebase pain to others.

@andybons andybons added the NeedsFix label Apr 11, 2018
@andybons andybons added this to the Unplanned milestone Apr 11, 2018
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