From 2e30531e78519a5b9c3773c2524e4fd4759cc5c8 Mon Sep 17 00:00:00 2001 From: Gaëtan Gilbert Date: Thu, 1 Mar 2018 18:28:36 +0100 Subject: Delayed weak constraints for cumulative inductive types. When comparing 2 irrelevant universes [u] and [v] we add a "weak constraint" [UWeak(u,v)] to the UState. Then at minimization time a weak constraint between unrelated universes where one is flexible causes them to be unified. --- engine/termops.ml | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'engine/termops.ml') diff --git a/engine/termops.ml b/engine/termops.ml index 20b6b3504..3dfb0c34f 100644 --- a/engine/termops.ml +++ b/engine/termops.ml @@ -302,7 +302,9 @@ let pr_evar_universe_context ctx = str"ALGEBRAIC UNIVERSES:"++brk(0,1)++ h 0 (Univ.LSet.pr prl (UState.algebraics ctx)) ++ fnl() ++ str"UNDEFINED UNIVERSES:"++brk(0,1)++ - h 0 (Universes.pr_universe_opt_subst (UState.subst ctx)) ++ fnl()) + h 0 (Universes.pr_universe_opt_subst (UState.subst ctx)) ++ fnl() ++ + str "WEAK CONSTRAINTS:"++brk(0,1)++ + h 0 (UState.pr_weak prl ctx) ++ fnl ()) let print_env_short env = let print_constr = print_kconstr in -- cgit v1.2.3