aboutsummaryrefslogtreecommitdiffhomepage
path: root/lib/util.mli
blob: 1eb60f509aacd71592c8c90cfb07ae061a0cf746 (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
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
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
(************************************************************************)
(*         *   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)         *)
(************************************************************************)

(** This module contains numerous utility functions on strings, lists,
   arrays, etc. *)

(** Mapping under pairs *)

val on_fst : ('a -> 'b) -> 'a * 'c -> 'b * 'c
val on_snd : ('a -> 'b) -> 'c * 'a -> 'c * 'b
val map_pair : ('a -> 'b) -> 'a * 'a -> 'b * 'b

(** Mapping under triple *)

val on_pi1 : ('a -> 'b) -> 'a * 'c * 'd -> 'b * 'c * 'd
val on_pi2 : ('a -> 'b) -> 'c * 'a * 'd -> 'c * 'b * 'd
val on_pi3 : ('a -> 'b) -> 'c * 'd * 'a -> 'c * 'd * 'b

(** {6 Projections from triplets } *)

val pi1 : 'a * 'b * 'c -> 'a
val pi2 : 'a * 'b * 'c -> 'b
val pi3 : 'a * 'b * 'c -> 'c

(** {6 Chars. } *)

val is_letter : char -> bool
val is_digit : char -> bool
val is_ident_tail : char -> bool
val is_blank : char -> bool

(** {6 Empty type} *)

module Empty :
sig
  type t
  val abort : t -> 'a
end

(** {6 Strings. } *)

module String : CString.ExtS

(** Substitute %s in the first chain by the second chain *)
val subst_command_placeholder : string -> string -> string

(** {6 Lists. } *)

module List : CList.ExtS

val (@) : 'a list -> 'a list -> 'a list

(** {6 Arrays. } *)

module Array : CArray.ExtS

(** {6 Sets. } *)

module Set : module type of CSet

(** {6 Maps. } *)

module Map : module type of CMap

(** {6 Stacks.} *)

module Stack : module type of CStack

(** {6 Streams. } *)

val stream_nth : int -> 'a Stream.t -> 'a
val stream_njunk : int -> 'a Stream.t -> unit

(** {6 Matrices. } *)

val matrix_transpose : 'a list list -> 'a list list

(** {6 Functions. } *)

val identity : 'a -> 'a

(** Left-to-right function composition:
    
    [f1 %> f2] is [fun x -> f2 (f1 x)].

    [f1 %> f2 %> f3] is [fun x -> f3 (f2 (f1 x))].

    [f1 %> f2 %> f3 %> f4] is [fun x -> f4 (f3 (f2 (f1 x)))]

    etc.
*)
val ( %> ) : ('a -> 'b) -> ('b -> 'c) -> 'a -> 'c

val const : 'a -> 'b -> 'a
val iterate : ('a -> 'a) -> int -> 'a -> 'a
val repeat : int -> ('a -> unit) -> 'a -> unit
val app_opt : ('a -> 'a) option -> 'a -> 'a

(** {6 Delayed computations. } *)

type 'a delayed = unit -> 'a

val delayed_force : 'a delayed -> 'a

(** {6 Enriched exceptions} *)

type iexn = Exninfo.iexn

val iraise : iexn -> 'a

(** {6 Misc. } *)

type ('a, 'b) union = ('a, 'b) CSig.union = Inl of 'a | Inr of 'b
(** Union type *)

module Union :
sig
  val map : ('a -> 'c) -> ('b -> 'd) -> ('a, 'b) union -> ('c, 'd) union
  val equal : ('a -> 'a -> bool) -> ('b -> 'b -> bool) -> ('a, 'b) union -> ('a, 'b) union -> bool
  val fold_left : ('c -> 'a -> 'c) -> ('c -> 'b -> 'c) -> 'c -> ('a, 'b) union -> 'c
end

val map_union : ('a -> 'c) -> ('b -> 'd) -> ('a, 'b) union -> ('c, 'd) union
(** Alias for [Union.map] *)

type 'a until = 'a CSig.until = Stop of 'a | Cont of 'a
(** Used for browsable-until structures. *)

type ('a, 'b) eq = ('a, 'b) CSig.eq = Refl : ('a, 'a) eq

val sym : ('a, 'b) eq -> ('b, 'a) eq

val open_utf8_file_in : string -> in_channel
(** Open an utf-8 encoded file and skip the byte-order mark if any. *)

val set_temporary_memory : unit -> ('a -> 'a) * (unit -> 'a)
(** A trick which can typically be used to store on the fly the
   computation of values in the "when" clause of a "match" then
   retrieve the evaluated result in the r.h.s of the clause *)