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
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
|
(************************************************************************)
(* * The Coq Proof Assistant / The Coq Development Team *)
(* v * Copyright INRIA, CNRS and contributors *)
(* <O___,, * (see version control and CREDITS file for authors & dates) *)
(* \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) *)
(************************************************************************)
(* Locations management *)
type source =
(* OCaml won't allow using DirPath.t in InFile *)
| InFile of { dirpath : string option; file : string }
| ToplevelInput
type t = {
fname : source; (** filename or toplevel input *)
line_nb : int; (** start line number *)
bol_pos : int; (** position of the beginning of start line *)
line_nb_last : int; (** end line number *)
bol_pos_last : int; (** position of the beginning of end line *)
bp : int; (** start position *)
ep : int; (** end position *)
}
let create fname line_nb bol_pos bp ep = {
fname = fname; line_nb = line_nb; bol_pos = bol_pos;
line_nb_last = line_nb; bol_pos_last = bol_pos; bp = bp; ep = ep;
}
let initial source = create source 1 0 0 0
let make_loc (bp, ep) = {
fname = ToplevelInput; line_nb = -1; bol_pos = 0; line_nb_last = -1; bol_pos_last = 0;
bp = bp; ep = ep;
}
let mergeable loc1 loc2 =
loc1.fname = loc2.fname
let merge loc1 loc2 =
if not (mergeable loc1 loc2) then
failwith "Trying to merge unmergeable locations.";
if loc1.bp < loc2.bp then
if loc1.ep < loc2.ep then {
fname = loc1.fname;
line_nb = loc1.line_nb;
bol_pos = loc1.bol_pos;
line_nb_last = loc2.line_nb_last;
bol_pos_last = loc2.bol_pos_last;
bp = loc1.bp; ep = loc2.ep;
}
else loc1
else if loc2.ep < loc1.ep then {
fname = loc2.fname;
line_nb = loc2.line_nb;
bol_pos = loc2.bol_pos;
line_nb_last = loc1.line_nb_last;
bol_pos_last = loc1.bol_pos_last;
bp = loc2.bp; ep = loc1.ep;
}
else loc2
let merge_opt l1 l2 = match l1, l2 with
| None, None -> None
| Some l , None -> Some l
| None, Some l -> Some l
| Some l1, Some l2 -> Some (merge l1 l2)
let sub loc sh len = {loc with bp = loc.bp + sh; ep = loc.bp + sh + len}
let after loc sh len = {loc with bp = loc.ep + sh; ep = loc.ep + sh + len}
let finer l1 l2 = match l1, l2 with
| None, _ -> false
| Some l , None -> true
| Some l1, Some l2 -> l1.fname = l2.fname && merge l1 l2 = l2
let unloc loc = (loc.bp, loc.ep)
let shift_loc kb kp loc = { loc with bp = loc.bp + kb ; ep = loc.ep + kp }
(** Located type *)
type 'a located = t option * 'a
let tag ?loc x = loc, x
let map f (l,x) = (l, f x)
(** Exceptions *)
let location : t Exninfo.t = Exninfo.make "location"
let add_loc e loc = Exninfo.add e location loc
let get_loc e = Exninfo.get e location
let raise ?loc e =
match loc with
| None -> raise e
| Some loc ->
let info = Exninfo.add Exninfo.null location loc in
Exninfo.iraise (e, info)
let pr loc =
let open Pp in
let fname = loc.fname in
match fname with
| ToplevelInput ->
(str"Toplevel input, characters " ++ int loc.bp ++
str"-" ++ int loc.ep)
| InFile { file } ->
(str"File " ++ str "\"" ++ str file ++ str "\"" ++
str", line " ++ int loc.line_nb ++ str", characters " ++
int (loc.bp-loc.bol_pos) ++ str"-" ++ int (loc.ep-loc.bol_pos))
|
