aboutsummaryrefslogtreecommitdiffhomepage
path: root/interp/ppextend.ml
blob: 713306690ba68ab34885e2b6c627c21c9b2e582f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
(***********************************************************************)
(*  v      *   The Coq Proof Assistant  /  The Coq Development Team    *)
(* <O___,, *        INRIA-Rocquencourt  &  LRI-CNRS-Orsay              *)
(*   \VV/  *************************************************************)
(*    //   *      This file is distributed under the terms of the      *)
(*         *       GNU Lesser General Public License Version 2.1       *)
(***********************************************************************)

(*i $Id$ *)

(*i*)
open Pp
open Util
open Names
(*i*)

(*s Pretty-print. *)

(* Dealing with precedences *)

type precedence = int

type parenRelation = L | E | Any | Prec of precedence

type tolerability = precedence * parenRelation

type ppbox =
  | PpHB of int
  | PpHOVB of int
  | PpHVB of int
  | PpVB of int
  | PpTB

type ppcut =
  | PpBrk of int * int
  | PpTbrk of int * int
  | PpTab
  | PpFnl

let ppcmd_of_box = function
  | PpHB n -> h n
  | PpHOVB n -> hov n
  | PpHVB n -> hv n
  | PpVB n -> v n
  | PpTB   -> t

let ppcmd_of_cut = function
  | PpTab -> tab ()
  | PpFnl -> fnl ()
  | PpBrk(n1,n2) -> brk(n1,n2)
  | PpTbrk(n1,n2) -> tbrk(n1,n2)

type unparsing = 
  | UnpMetaVar of tolerability
  | UnpTerminal of string
  | UnpBox of ppbox * unparsing list
  | UnpCut of ppcut