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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
(** The kinds of existential variable *)
(** Should the obligation be defined (opaque or transparent (default)) or
defined transparent and expanded in the term? *)
type obligation_definition_status = Define of bool | Expand
type matching_var_kind = FirstOrderPatVar of Id.t | SecondOrderPatVar of Id.t
type subevar_kind = Domain | Codomain | Body
(* maybe this should be a Projection.t *)
type record_field = { fieldname : Constant.t; recordname : Names.inductive }
type question_mark = {
qm_obligation: obligation_definition_status;
qm_name: Name.t;
qm_record_field: record_field option;
}
let default_question_mark = {
qm_obligation=Define true;
qm_name=Anonymous;
qm_record_field=None;
}
type t =
| ImplicitArg of GlobRef.t * (int * Id.t option)
* bool (** Force inference *)
| BinderType of Name.t
| NamedHole of Id.t (* coming from some ?[id] syntax *)
| QuestionMark of question_mark
| CasesType of bool (* true = a subterm of the type *)
| InternalHole
| TomatchTypeParameter of inductive * int
| GoalEvar
| ImpossibleCase
| MatchingVar of matching_var_kind
| VarInstance of Id.t
| SubEvar of subevar_kind option * Evar.t