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Set Printing Universes.
Module AutoYes.
Inductive Box (A:Type) : Type := box : A -> Box A.
About Box.
(* This checks that Box is template poly, see module No for how it fails *)
Universe i j. Constraint i < j.
Definition j_lebox (A:Type@{j}) := Box A.
Definition box_lti A := Box A : Type@{i}.
End AutoYes.
Module AutoNo.
Unset Auto Template Polymorphism.
Inductive Box (A:Type) : Type := box : A -> Box A.
About Box.
Universe i j. Constraint i < j.
Definition j_lebox (A:Type@{j}) := Box A.
Fail Definition box_lti A := Box A : Type@{i}.
End AutoNo.
Module Yes.
#[universes(template)]
Inductive Box@{i} (A:Type@{i}) : Type@{i} := box : A -> Box A.
About Box.
Universe i j. Constraint i < j.
Definition j_lebox (A:Type@{j}) := Box A.
Definition box_lti A := Box A : Type@{i}.
End Yes.
Module No.
#[universes(notemplate)]
Inductive Box (A:Type) : Type := box : A -> Box A.
About Box.
Universe i j. Constraint i < j.
Definition j_lebox (A:Type@{j}) := Box A.
Fail Definition box_lti A := Box A : Type@{i}.
End No.
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