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diff --git a/plugins/ltac/pltac.ml b/plugins/ltac/pltac.ml
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+(************************************************************************)
+(*         *   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 Pcoq
+
+(* Main entry for extensions *)
+let simple_tactic = Gram.entry_create "tactic:simple_tactic"
+
+let make_gen_entry _ name = Gram.entry_create ("tactic:" ^ name)
+
+(* Entries that can be referred via the string -> Gram.entry table *)
+(* Typically for tactic user extensions *)
+let open_constr =
+  make_gen_entry utactic "open_constr"
+let constr_with_bindings =
+  make_gen_entry utactic "constr_with_bindings"
+let bindings =
+  make_gen_entry utactic "bindings"
+let hypident = Gram.entry_create "hypident"
+let constr_may_eval = make_gen_entry utactic "constr_may_eval"
+let constr_eval = make_gen_entry utactic "constr_eval"
+let uconstr =
+  make_gen_entry utactic "uconstr"
+let quantified_hypothesis =
+  make_gen_entry utactic "quantified_hypothesis"
+let destruction_arg = make_gen_entry utactic "destruction_arg"
+let int_or_var = make_gen_entry utactic "int_or_var"
+let simple_intropattern =
+  make_gen_entry utactic "simple_intropattern"
+let in_clause = make_gen_entry utactic "in_clause"
+let clause_dft_concl = 
+  make_gen_entry utactic "clause"
+
+
+(* Main entries for ltac *)
+let tactic_arg = Gram.entry_create "tactic:tactic_arg"
+let tactic_expr = make_gen_entry utactic "tactic_expr"
+let binder_tactic = make_gen_entry utactic "binder_tactic"
+
+let tactic = make_gen_entry utactic "tactic"
+
+(* Main entry for quotations *)
+let tactic_eoi = eoi_entry tactic
+
+let () =
+  let open Stdarg in
+  let open Tacarg in
+  register_grammar wit_int_or_var (int_or_var);
+  register_grammar wit_intro_pattern (simple_intropattern);
+  register_grammar wit_quant_hyp (quantified_hypothesis);
+  register_grammar wit_uconstr (uconstr);
+  register_grammar wit_open_constr (open_constr);
+  register_grammar wit_constr_with_bindings (constr_with_bindings);
+  register_grammar wit_bindings (bindings);
+  register_grammar wit_tactic (tactic);
+  register_grammar wit_ltac (tactic);
+  register_grammar wit_clause_dft_concl (clause_dft_concl);
+  register_grammar wit_destruction_arg (destruction_arg);
+  ()