From 75508769762372043387c67a9abe94e8f940e80a Mon Sep 17 00:00:00 2001
From: Gaëtan Gilbert
Date: Fri, 27 Oct 2017 14:03:51 +0200
Subject: Add a non-cumulative impredicative universe SProp.

Note currently it's impossible to define inductives in SProp because
indtypes.ml and the pretyper aren't fully plugged.
---
 kernel/indTyping.ml | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

(limited to 'kernel/indTyping.ml')

diff --git a/kernel/indTyping.ml b/kernel/indTyping.ml
index a5dafc5ab5..0d63c8feba 100644
--- a/kernel/indTyping.ml
+++ b/kernel/indTyping.ml
@@ -199,9 +199,10 @@ let check_constructors env_ar_par params lc (arity,indices,univ_info) =
 (* - all_sorts in case of small, unitary Prop (not smashed) *)
 (* - logical_sorts in case of large, unitary Prop (smashed) *)
 
-let all_sorts = [InProp;InSet;InType]
-let small_sorts = [InProp;InSet]
-let logical_sorts = [InProp]
+let all_sorts = [InSProp;InProp;InSet;InType]
+let small_sorts = [InSProp;InProp;InSet]
+let logical_sorts = [InSProp;InProp]
+let sprop_sorts = [InSProp]
 
 let allowed_sorts {ind_squashed;ind_univ;ind_min_univ=_} =
   if not ind_squashed then all_sorts
@@ -209,6 +210,7 @@ let allowed_sorts {ind_squashed;ind_univ;ind_min_univ=_} =
     | InType -> assert false
     | InSet -> small_sorts
     | InProp -> logical_sorts
+    | InSProp -> sprop_sorts
 
 (* Returns the list [x_1, ..., x_n] of levels contributing to template
    polymorphism. The elements x_k is None if the k-th parameter (starting
-- 
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