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| author |  Stephane Glondu <steph@glondu.net> | 2011-12-25 13:19:42 +0100 |
|---|---|---|
| committer | Stephane Glondu <steph@glondu.net> | 2011-12-25 13:19:42 +0100 |
| commit | 300293c119981054c95182a90c829058530a6b6f (patch) | |
| tree | d7303613741c5796b58ced7db24ec7203327dbb2 /kernel/inductive.ml | |
| parent | 9d27ae09786866b6e3d7b79d1fa7667e5e2aa309 (diff) | |
Imported Upstream version 8.3.pl3upstream/8.3.pl3
Diffstat (limited to 'kernel/inductive.ml')
| -rw-r--r-- | kernel/inductive.ml | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/kernel/inductive.ml b/kernel/inductive.ml index ba5e5252..62a48f07 100644 --- a/kernel/inductive.ml +++ b/kernel/inductive.ml @@ -1,12 +1,12 @@ (************************************************************************) (* v * The Coq Proof Assistant / The Coq Development Team *) -(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2010 *) +(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2011 *) (* \VV/ **************************************************************) (* // * This file is distributed under the terms of the *) (* * GNU Lesser General Public License Version 2.1 *) (************************************************************************) -(* $Id: inductive.ml 13368 2010-08-03 13:22:49Z barras $ *) +(* $Id: inductive.ml 14641 2011-11-06 11:59:10Z herbelin $ *) open Util open Names @@ -186,13 +186,20 @@ let instantiate_universes env ctx ar argsorts = (* This is a Type with constraints *) else Type level -let type_of_inductive_knowing_parameters env mip paramtyps = +exception SingletonInductiveBecomesProp of identifier + +let type_of_inductive_knowing_parameters ?(polyprop=true) env mip paramtyps = match mip.mind_arity with | Monomorphic s -> s.mind_user_arity | Polymorphic ar -> let ctx = List.rev mip.mind_arity_ctxt in let ctx,s = instantiate_universes env ctx ar paramtyps in + (* The Ocaml extraction cannot handle (yet?) "Prop-polymorphism", i.e. + the situation where a non-Prop singleton inductive becomes Prop + when applied to Prop params *) + if not polyprop && not (is_type0m_univ ar.poly_level) && s = prop_sort + then raise (SingletonInductiveBecomesProp mip.mind_typename); mkArity (List.rev ctx,s) (* Type of a (non applied) inductive type *) |