fix #31899, type intersection involving Int in upper bound #31960
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JeffBezanson
added
types and dispatch
vtjnash
reviewed
May 7, 2019
| JL_GC_PUSH2(&res, &newvar); | ||
| // try to reduce var to a single value | ||
| if (obviously_egal(vb->lb, vb->ub)) { | ||
| if (jl_is_long(vb->ub) && jl_is_typevar(vb->lb)) { |
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jl_is_typevar(vb->lb)
IIUC, doesn't this also need checks that vb->ub <: jl_any_type && vb->lb >: Union{}?
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Yes, that would be more precise, I just wanted to be conservative here and also not complicate the code too much.
vtjnash
reviewed
May 7, 2019
| if (xx) record_var_occurrence(xx, e, param); | ||
| if (xx->lb == jl_bottom_type) | ||
| return 1; // allow Bottom <: non-type | ||
| return subtype(xx->lb, yy->ub, e, 0); |
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I would have thought subtype should already handle lhs == Union{}, instead of needing to add a fast-path here to catch some cases of it just for the egal case?
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Yeah, it should be ok to change that. I thought there might be some reason we don't have that general fast path, but I'm not sure what it would be.
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