Comments (3)
- after
(R : ringType)
take a(ph : phant R)
in the mixin - at structure definition,
ph
are not abstrcted but rather specialized in both the structure type /abbreviation and the operations:Foo.type R := Foo.type_ R (Phant R)
Foo.op R x y := ... (Phant R) ...
from hierarchy-builder.
IIUC, subtyping functions should preserve phantom arguments and displays. For example, in the master branch of MathComp:
GRing.Algebra.lalgType
: forall (R : ringType) (phR : phant R), GRing.Algebra.type (R:=R) phR -> GRing.Lalgebra.type (R:=R) phR
Order.Total.porderType
: forall disp : unit, orderType disp -> porderType disp
In MathComp, these arguments appear only in the argument of structure records, and do not appear in mixins and classes. Displays should not actually appear in mixins and classes. I think we need some special treatments for these points.
from hierarchy-builder.
OK, I'll try something
from hierarchy-builder.
Related Issues (20)
- `isFinite.Build` with an explicit list creates a warning about a canonical projection to cons
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- hnf is broken in master HOT 1
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- Please pick the version you prefer for Coq 8.19 in Coq Platform 2024.01 HOT 2
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from hierarchy-builder.