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(************************************************************************)
(* * The Coq Proof Assistant / The Coq Development Team *)
(* v * INRIA, CNRS and contributors - Copyright 1999-2019 *)
(* <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 *)
(* * (see LICENSE file for the text of the license) *)
(************************************************************************)
open Names
open EConstr
open Environ
type typeclass_error =
| NotAClass of constr
| UnboundMethod of GlobRef.t * lident (* Class name, method *)
exception TypeClassError of env * Evd.evar_map * typeclass_error
let typeclass_error env sigma err = raise (TypeClassError (env, sigma, err))
let not_a_class env sigma c = typeclass_error env sigma (NotAClass c)
let unbound_method env sigma cid id = typeclass_error env sigma (UnboundMethod (cid, id))