From 9043add656177eeac1491a73d2f3ab92bec0013c Mon Sep 17 00:00:00 2001
From: Benjamin Barenblat <bbaren@debian.org>
Date: Sat, 29 Dec 2018 14:31:27 -0500
Subject: Imported Upstream version 8.8.2

---
 plugins/ltac/tacexpr.ml | 397 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 397 insertions(+)
 create mode 100644 plugins/ltac/tacexpr.ml

(limited to 'plugins/ltac/tacexpr.ml')

diff --git a/plugins/ltac/tacexpr.ml b/plugins/ltac/tacexpr.ml
new file mode 100644
index 00000000..8b0c4404
--- /dev/null
+++ b/plugins/ltac/tacexpr.ml
@@ -0,0 +1,397 @@
+(************************************************************************)
+(*         *   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          *)
+(*         *     (see LICENSE file for the text of the license)         *)
+(************************************************************************)
+
+open Loc
+open Names
+open Constrexpr
+open Libnames
+open Genredexpr
+open Genarg
+open Pattern
+open Misctypes
+open Locus
+
+type ltac_constant = KerName.t
+
+type direction_flag = bool (* true = Left-to-right    false = right-to-right *)
+type lazy_flag =
+  | General (* returns all possible successes *)
+  | Select  (* returns all successes of the first matching branch *)
+  | Once    (* returns the first success in a maching branch
+               (not necessarily the first) *)
+type global_flag = (* [gfail] or [fail] *)
+  | TacGlobal
+  | TacLocal
+type evars_flag = bool     (* true = pose evars       false = fail on evars *)
+type rec_flag = bool       (* true = recursive        false = not recursive *)
+type advanced_flag = bool  (* true = advanced         false = basic *)
+type letin_flag = bool     (* true = use local def    false = use Leibniz *)
+type clear_flag = bool option (* true = clear hyp, false = keep hyp, None = use default *)
+
+type goal_selector = Vernacexpr.goal_selector =
+  | SelectNth of int
+  | SelectList of (int * int) list
+  | SelectId of Id.t
+  | SelectAll
+
+type 'a core_destruction_arg = 'a Misctypes.core_destruction_arg =
+  | ElimOnConstr of 'a
+  | ElimOnIdent of lident
+  | ElimOnAnonHyp of int
+
+type 'a destruction_arg =
+  clear_flag * 'a core_destruction_arg
+
+type inversion_kind = Misctypes.inversion_kind =
+  | SimpleInversion
+  | FullInversion
+  | FullInversionClear
+
+type ('c,'d,'id) inversion_strength =
+  | NonDepInversion of
+      inversion_kind * 'id list * 'd or_and_intro_pattern_expr CAst.t or_var option
+  | DepInversion of
+      inversion_kind * 'c option * 'd or_and_intro_pattern_expr CAst.t or_var option
+  | InversionUsing of 'c * 'id list
+
+type ('a,'b) location = HypLocation of 'a | ConclLocation of 'b
+
+type 'id message_token =
+  | MsgString of string
+  | MsgInt of int
+  | MsgIdent of 'id
+
+type ('dconstr,'id) induction_clause =
+    'dconstr with_bindings destruction_arg *
+    (intro_pattern_naming_expr CAst.t option (* eqn:... *)
+    * 'dconstr or_and_intro_pattern_expr CAst.t or_var option) (* as ... *)
+    * 'id clause_expr option (* in ... *)
+
+type ('constr,'dconstr,'id) induction_clause_list =
+    ('dconstr,'id) induction_clause list
+    * 'constr with_bindings option (* using ... *)
+
+type 'a with_bindings_arg = clear_flag * 'a with_bindings
+
+(* Type of patterns *)
+type 'a match_pattern =
+  | Term of 'a
+  | Subterm of Id.t option * 'a
+
+(* Type of hypotheses for a Match Context rule *)
+type 'a match_context_hyps =
+  | Hyp of lname * 'a match_pattern
+  | Def of lname * 'a match_pattern * 'a match_pattern
+
+(* Type of a Match rule for Match Context and Match *)
+type ('a,'t) match_rule =
+  | Pat of 'a match_context_hyps list * 'a match_pattern * 't
+  | All of 't
+
+(** Extension indentifiers for the TACTIC EXTEND mechanism. *)
+type ml_tactic_name = {
+  (** Name of the plugin where the tactic is defined, typically coming from a
+      DECLARE PLUGIN statement in the source. *)
+  mltac_plugin : string;
+  (** Name of the tactic entry where the tactic is defined, typically found
+      after the TACTIC EXTEND statement in the source. *)
+  mltac_tactic : string;
+}
+
+type ml_tactic_entry = {
+  mltac_name : ml_tactic_name;
+  mltac_index : int;
+}
+
+(** Composite types *)
+
+type glob_constr_and_expr = Tactypes.glob_constr_and_expr
+
+type open_constr_expr = unit * constr_expr
+type open_glob_constr = unit * glob_constr_and_expr
+
+type binding_bound_vars = Constr_matching.binding_bound_vars
+type glob_constr_pattern_and_expr = binding_bound_vars * glob_constr_and_expr * constr_pattern
+
+type 'a delayed_open = Environ.env -> Evd.evar_map -> Evd.evar_map * 'a
+
+type delayed_open_constr_with_bindings = EConstr.constr with_bindings delayed_open
+
+type delayed_open_constr = EConstr.constr delayed_open
+
+type intro_pattern = delayed_open_constr intro_pattern_expr CAst.t
+type intro_patterns = delayed_open_constr intro_pattern_expr CAst.t list
+type or_and_intro_pattern = delayed_open_constr or_and_intro_pattern_expr CAst.t
+type intro_pattern_naming = intro_pattern_naming_expr CAst.t
+
+(** Generic expressions for atomic tactics *)
+
+type 'a gen_atomic_tactic_expr =
+  (* Basic tactics *)
+  | TacIntroPattern of evars_flag * 'dtrm intro_pattern_expr CAst.t list
+  | TacApply of advanced_flag * evars_flag * 'trm with_bindings_arg list *
+      ('nam * 'dtrm intro_pattern_expr CAst.t option) option
+  | TacElim of evars_flag * 'trm with_bindings_arg * 'trm with_bindings option
+  | TacCase of evars_flag * 'trm with_bindings_arg
+  | TacMutualFix of Id.t * int * (Id.t * int * 'trm) list
+  | TacMutualCofix of Id.t * (Id.t * 'trm) list
+  | TacAssert of
+      evars_flag * bool * 'tacexpr option option *
+      'dtrm intro_pattern_expr CAst.t option * 'trm
+  | TacGeneralize of ('trm with_occurrences * Name.t) list
+  | TacLetTac of evars_flag * Name.t * 'trm * 'nam clause_expr * letin_flag *
+      intro_pattern_naming_expr CAst.t option
+
+  (* Derived basic tactics *)
+  | TacInductionDestruct of
+      rec_flag * evars_flag * ('trm,'dtrm,'nam) induction_clause_list
+
+  (* Conversion *)
+  | TacReduce of ('trm,'cst,'pat) red_expr_gen * 'nam clause_expr
+  | TacChange of 'pat option * 'dtrm * 'nam clause_expr
+
+  (* Equality and inversion *)
+  | TacRewrite of evars_flag *
+      (bool * multi * 'dtrm with_bindings_arg) list * 'nam clause_expr *
+      (* spiwack: using ['dtrm] here is a small hack, may not be
+         stable by a change in the representation of delayed
+         terms. Because, in fact, it is the whole "with_bindings"
+         which is delayed. But because the "t" level for ['dtrm] is
+         uninterpreted, it works fine here too, and avoid more
+         disruption of this file. *)
+      'tacexpr option
+  | TacInversion of ('trm,'dtrm,'nam) inversion_strength * quantified_hypothesis
+
+constraint 'a = <
+    term:'trm;
+    dterm: 'dtrm;
+    pattern:'pat;
+    constant:'cst;
+    reference:'ref;
+    name:'nam;
+    tacexpr:'tacexpr;
+    level:'lev
+>
+
+(** Possible arguments of a tactic definition *)
+
+type 'a gen_tactic_arg =
+  | TacGeneric     of 'lev generic_argument
+  | ConstrMayEval  of ('trm,'cst,'pat) may_eval
+  | Reference      of 'ref
+  | TacCall    of ('ref * 'a gen_tactic_arg list) Loc.located
+  | TacFreshId of string or_var list
+  | Tacexp of 'tacexpr
+  | TacPretype of 'trm
+  | TacNumgoals
+
+constraint 'a = <
+    term:'trm;
+    dterm: 'dtrm;
+    pattern:'pat;
+    constant:'cst;
+    reference:'ref;
+    name:'nam;
+    tacexpr:'tacexpr;
+    level:'lev
+>
+
+(** Generic ltac expressions.
+    't : terms, 'p : patterns, 'c : constants, 'i : inductive,
+    'r : ltac refs, 'n : idents, 'l : levels *)
+
+and 'a gen_tactic_expr =
+  | TacAtom of ('a gen_atomic_tactic_expr) Loc.located
+  | TacThen of
+      'a gen_tactic_expr *
+      'a gen_tactic_expr
+  | TacDispatch of
+      'a gen_tactic_expr list
+  | TacExtendTac of
+      'a gen_tactic_expr array *
+      'a gen_tactic_expr *
+      'a gen_tactic_expr array
+  | TacThens of
+      'a gen_tactic_expr *
+      'a gen_tactic_expr list
+  | TacThens3parts of
+      'a gen_tactic_expr *
+      'a gen_tactic_expr array *
+      'a gen_tactic_expr *
+      'a gen_tactic_expr array
+  | TacFirst of 'a gen_tactic_expr list
+  | TacComplete of 'a gen_tactic_expr
+  | TacSolve of 'a gen_tactic_expr list
+  | TacTry of 'a gen_tactic_expr
+  | TacOr of
+      'a gen_tactic_expr *
+      'a gen_tactic_expr
+  | TacOnce of
+      'a gen_tactic_expr
+  | TacExactlyOnce of
+      'a gen_tactic_expr
+  | TacIfThenCatch of
+      'a gen_tactic_expr *
+      'a gen_tactic_expr *
+      'a gen_tactic_expr
+  | TacOrelse of
+      'a gen_tactic_expr *
+      'a gen_tactic_expr
+  | TacDo of int or_var * 'a gen_tactic_expr
+  | TacTimeout of int or_var * 'a gen_tactic_expr
+  | TacTime of string option * 'a gen_tactic_expr
+  | TacRepeat of 'a gen_tactic_expr
+  | TacProgress of 'a gen_tactic_expr
+  | TacShowHyps of 'a gen_tactic_expr
+  | TacAbstract of
+      'a gen_tactic_expr * Id.t option
+  | TacId of 'n message_token list
+  | TacFail of global_flag * int or_var * 'n message_token list
+  | TacInfo of 'a gen_tactic_expr
+  | TacLetIn of rec_flag *
+      (lname * 'a gen_tactic_arg) list *
+      'a gen_tactic_expr
+  | TacMatch of lazy_flag *
+      'a gen_tactic_expr *
+      ('p,'a gen_tactic_expr) match_rule list
+  | TacMatchGoal of lazy_flag * direction_flag *
+      ('p,'a gen_tactic_expr) match_rule list
+  | TacFun of 'a gen_tactic_fun_ast
+  | TacArg of 'a gen_tactic_arg located
+  | TacSelect of goal_selector * 'a gen_tactic_expr
+  (* For ML extensions *)
+  | TacML of (ml_tactic_entry * 'a gen_tactic_arg list) Loc.located
+  (* For syntax extensions *)
+  | TacAlias of (KerName.t * 'a gen_tactic_arg list) Loc.located
+
+constraint 'a = <
+    term:'t;
+    dterm: 'dtrm;
+    pattern:'p;
+    constant:'c;
+    reference:'r;
+    name:'n;
+    tacexpr:'tacexpr;
+    level:'l
+>
+
+and 'a gen_tactic_fun_ast =
+    Name.t list * 'a gen_tactic_expr
+
+constraint 'a = <
+    term:'t;
+    dterm: 'dtrm;
+    pattern:'p;
+    constant:'c;
+    reference:'r;
+    name:'n;
+    tacexpr:'te;
+    level:'l
+>
+
+(** Globalized tactics *)
+
+type g_trm = glob_constr_and_expr
+type g_pat = glob_constr_pattern_and_expr
+type g_cst = evaluable_global_reference and_short_name or_var
+type g_ref = ltac_constant located or_var
+type g_nam = lident
+
+type g_dispatch =  <
+    term:g_trm;
+    dterm:g_trm;
+    pattern:g_pat;
+    constant:g_cst;
+    reference:g_ref;
+    name:g_nam;
+    tacexpr:glob_tactic_expr;
+    level:glevel
+>
+
+and glob_tactic_expr =
+    g_dispatch gen_tactic_expr
+
+type glob_atomic_tactic_expr =
+    g_dispatch gen_atomic_tactic_expr
+
+type glob_tactic_arg =
+    g_dispatch gen_tactic_arg
+
+(** Raw tactics *)
+
+type r_trm = constr_expr
+type r_pat = constr_pattern_expr
+type r_cst = reference or_by_notation
+type r_ref = reference
+type r_nam = lident
+type r_lev = rlevel
+
+type r_dispatch =  <
+    term:r_trm;
+    dterm:r_trm;
+    pattern:r_pat;
+    constant:r_cst;
+    reference:r_ref;
+    name:r_nam;
+    tacexpr:raw_tactic_expr;
+    level:rlevel
+>
+
+and raw_tactic_expr =
+    r_dispatch gen_tactic_expr
+
+type raw_atomic_tactic_expr =
+    r_dispatch gen_atomic_tactic_expr
+
+type raw_tactic_arg =
+    r_dispatch gen_tactic_arg
+
+(** Interpreted tactics *)
+
+type t_trm = EConstr.constr
+type t_pat = constr_pattern
+type t_cst = evaluable_global_reference
+type t_ref = ltac_constant located
+type t_nam = Id.t
+
+type t_dispatch =  <
+    term:t_trm;
+    dterm:g_trm;
+    pattern:t_pat;
+    constant:t_cst;
+    reference:t_ref;
+    name:t_nam;
+    tacexpr:unit;
+    level:tlevel
+>
+
+type atomic_tactic_expr =
+    t_dispatch gen_atomic_tactic_expr
+
+(** Misc *)
+
+type raw_red_expr = (r_trm, r_cst, r_pat) red_expr_gen
+type glob_red_expr = (g_trm, g_cst, g_pat) red_expr_gen
+
+(** Traces *)
+
+type ltac_call_kind =
+  | LtacMLCall of glob_tactic_expr
+  | LtacNotationCall of KerName.t
+  | LtacNameCall of ltac_constant
+  | LtacAtomCall of glob_atomic_tactic_expr
+  | LtacVarCall of Id.t * glob_tactic_expr
+  | LtacConstrInterp of Glob_term.glob_constr * Ltac_pretype.ltac_var_map
+
+type ltac_trace = ltac_call_kind Loc.located list
+
+type tacdef_body =
+  | TacticDefinition of lident * raw_tactic_expr  (* indicates that user employed ':=' in Ltac body *)
+  | TacticRedefinition of reference * raw_tactic_expr       (* indicates that user employed '::=' in Ltac body *)
-- 
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