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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 Pp
open Genarg
open Geninterp
(* We register printers at two levels:
- generic arguments for general printers
- generic values for printing ltac values *)
(* Printing generic values *)
type 'a with_level =
{ default_already_surrounded : Notation_gram.tolerability;
default_ensure_surrounded : Notation_gram.tolerability;
printer : 'a }
type printer_result =
| PrinterBasic of (Environ.env -> Evd.evar_map -> Pp.t)
| PrinterNeedsLevel of (Environ.env -> Evd.evar_map -> Notation_gram.tolerability -> Pp.t) with_level
type printer_fun_with_level = Environ.env -> Evd.evar_map -> Notation_gram.tolerability -> Pp.t
type top_printer_result =
| TopPrinterBasic of (unit -> Pp.t)
| TopPrinterNeedsContext of (Environ.env -> Evd.evar_map -> Pp.t)
| TopPrinterNeedsContextAndLevel of printer_fun_with_level with_level
type 'a printer = 'a -> printer_result
type 'a top_printer = 'a -> top_printer_result
module ValMap = ValTMap (struct type 'a t = 'a -> top_printer_result end)
let print0_val_map = ref ValMap.empty
let find_print_val_fun tag =
try ValMap.find tag !print0_val_map
with Not_found ->
let msg s = Pp.(str "print function not found for a value interpreted as " ++ str s ++ str ".") in
CErrors.anomaly (msg (Val.repr tag))
let generic_val_print v =
let Val.Dyn (tag,v) = v in
find_print_val_fun tag v
let register_val_print0 s pr =
print0_val_map := ValMap.add s pr !print0_val_map
let combine_dont_needs pr_pair pr1 = function
| TopPrinterBasic pr2 ->
TopPrinterBasic (fun () -> pr_pair (pr1 ()) (pr2 ()))
| TopPrinterNeedsContext pr2 ->
TopPrinterNeedsContext (fun env sigma ->
pr_pair (pr1 ()) (pr2 env sigma))
| TopPrinterNeedsContextAndLevel { default_ensure_surrounded; printer } ->
TopPrinterNeedsContext (fun env sigma ->
pr_pair (pr1 ()) (printer env sigma default_ensure_surrounded))
let combine_needs pr_pair pr1 = function
| TopPrinterBasic pr2 ->
TopPrinterNeedsContext (fun env sigma -> pr_pair (pr1 env sigma) (pr2 ()))
| TopPrinterNeedsContext pr2 ->
TopPrinterNeedsContext (fun env sigma ->
pr_pair (pr1 env sigma) (pr2 env sigma))
| TopPrinterNeedsContextAndLevel { default_ensure_surrounded; printer } ->
TopPrinterNeedsContext (fun env sigma ->
pr_pair (pr1 env sigma) (printer env sigma default_ensure_surrounded))
let combine pr_pair pr1 v2 =
match pr1 with
| TopPrinterBasic pr1 ->
combine_dont_needs pr_pair pr1 (generic_val_print v2)
| TopPrinterNeedsContext pr1 ->
combine_needs pr_pair pr1 (generic_val_print v2)
| TopPrinterNeedsContextAndLevel { default_ensure_surrounded; printer } ->
combine_needs pr_pair (fun env sigma -> printer env sigma default_ensure_surrounded)
(generic_val_print v2)
let _ =
let pr_cons a b = Pp.(a ++ spc () ++ b) in
register_val_print0 Val.typ_list
(function
| [] -> TopPrinterBasic mt
| a::l ->
List.fold_left (combine pr_cons) (generic_val_print a) l)
let _ =
register_val_print0 Val.typ_opt
(function
| None -> TopPrinterBasic Pp.mt
| Some v -> generic_val_print v)
let _ =
let pr_pair a b = Pp.(a ++ spc () ++ b) in
register_val_print0 Val.typ_pair
(fun (v1,v2) -> combine pr_pair (generic_val_print v1) v2)
(* Printing generic arguments *)
type ('raw, 'glb, 'top) genprinter = {
raw : 'raw -> printer_result;
glb : 'glb -> printer_result;
top : 'top -> top_printer_result;
}
module PrintObj =
struct
type ('raw, 'glb, 'top) obj = ('raw, 'glb, 'top) genprinter
let name = "printer"
let default wit = match wit with
| ExtraArg tag ->
let name = ArgT.repr tag in
let printer = {
raw = (fun _ -> PrinterBasic (fun env sigma -> str "<genarg:" ++ str name ++ str ">"));
glb = (fun _ -> PrinterBasic (fun env sigma -> str "<genarg:" ++ str name ++ str ">"));
top = (fun _ -> TopPrinterBasic (fun () -> str "<genarg:" ++ str name ++ str ">"));
} in
Some printer
| _ -> assert false
end
module Print = Register (PrintObj)
let register_print0 wit raw glb top =
let printer = { raw; glb; top; } in
Print.register0 wit printer;
match val_tag (Topwit wit), wit with
| Val.Base t, ExtraArg t' when Geninterp.Val.repr t = ArgT.repr t' ->
register_val_print0 t top
| _ ->
(* An alias, thus no primitive printer attached *)
()
let register_vernac_print0 wit raw =
let glb _ = CErrors.anomaly (Pp.str "vernac argument needs not globwit printer.") in
let top _ = CErrors.anomaly (Pp.str "vernac argument needs not wit printer.") in
let printer = { raw; glb; top; } in
Print.register0 wit printer
let raw_print wit v = (Print.obj wit).raw v
let glb_print wit v = (Print.obj wit).glb v
let top_print wit v = (Print.obj wit).top v
let generic_raw_print (GenArg (Rawwit w, v)) = raw_print w v
let generic_glb_print (GenArg (Glbwit w, v)) = glb_print w v
let generic_top_print (GenArg (Topwit w, v)) = top_print w v