diff options
Diffstat (limited to 'kernel/reduction.ml')
| -rw-r--r-- | kernel/reduction.ml | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/kernel/reduction.ml b/kernel/reduction.ml index aba2b5535..2e59fcc18 100644 --- a/kernel/reduction.ml +++ b/kernel/reduction.ml @@ -1,9 +1,11 @@ (************************************************************************) -(* v * The Coq Proof Assistant / The Coq Development Team *) -(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2017 *) +(* * The Coq Proof Assistant / The Coq Development Team *) +(* v * INRIA, CNRS and contributors - Copyright 1999-2018 *) +(* <O___,, * (see CREDITS file for the list of authors) *) (* \VV/ **************************************************************) -(* // * This file is distributed under the terms of the *) -(* * GNU Lesser General Public License Version 2.1 *) +(* // * This file is distributed under the terms of the *) +(* * GNU Lesser General Public License Version 2.1 *) +(* * (see LICENSE file for the text of the license) *) (************************************************************************) (* Created under Benjamin Werner account by Bruno Barras to implement @@ -267,8 +269,9 @@ let convert_constructors_gen cmp_instances cmp_cumul (mind, ind, cns) nargs u1 u if not (Int.equal num_cnstr_args nargs) then cmp_instances u1 u2 s else - let csts = get_cumulativity_constraints CONV cumi u1 u2 in - cmp_cumul csts s + (** By invariant, both constructors have a common supertype, + so they are convertible _at that type_. *) + s let convert_constructors ctor nargs u1 u2 (s, check) = convert_constructors_gen (check.compare_instances ~flex:false) check.compare_cumul_instances |