1 (* Copyright (C) 2003-2005, HELM Team.
3 * This file is part of HELM, an Hypertextual, Electronic
4 * Library of Mathematics, developed at the Computer Science
5 * Department, University of Bologna, Italy.
7 * HELM is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
12 * HELM is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with HELM; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 * For details, see the HELM World-Wide-Web page,
23 * http://cs.unibo.it/helm/.
29 module N = CicNotationPt
31 (* functions to be moved ****************************************************)
33 let list_rev_map2 map l1 l2 =
34 let rec aux res = function
35 | hd1 :: tl1, hd2 :: tl2 -> aux (map hd1 hd2 :: res) (tl1, tl2)
40 let list_map2_filter map l1 l2 =
41 let rec filter l = function
43 | None :: tl -> filter l tl
44 | Some a :: tl -> filter (a :: l) tl
46 filter [] (list_rev_map2 map l1 l2)
49 let rec aux a j = if j < 0 then a else aux (f j :: a) (pred j) in
52 (****************************************************************************)
55 type what = Cic.annterm
57 type using = Cic.annterm
60 type where = (name * name) option
61 type inferred = Cic.annterm
62 type pattern = Cic.annterm
64 type step = Note of note
65 | Theorem of name * what * note
68 | Intros of count option * name list * note
69 | Cut of name * what * note
70 | LetIn of name * what * note
71 | Rewrite of how * what * where * pattern * note
72 | Elim of what * using option * pattern * note
73 | Apply of what * note
74 | Change of inferred * what * where * pattern * note
75 | ClearBody of name * note
76 | Branch of step list list * note
78 (* annterm constructors *****************************************************)
80 let mk_arel i b = Cic.ARel ("", "", i, b)
82 (* grafite ast constructors *************************************************)
84 let floc = H.dummy_floc
86 let mk_note str = G.Comment (floc, G.Note (floc, str))
88 let mk_tacnote str a =
89 if str = "" then mk_note "" :: a else mk_note "" :: mk_note str :: a
91 let mk_notenote str a =
92 if str = "" then a else mk_note str :: a
95 if str = "" then a else mk_note "" :: mk_note str :: a
97 let mk_theorem name t =
98 let obj = N.Theorem (`Theorem, name, t, None) in
99 G.Executable (floc, G.Command (floc, G.Obj (floc, obj)))
102 G.Executable (floc, G.Command (floc, G.Qed floc))
104 let mk_tactic tactic punctation =
105 G.Executable (floc, G.Tactic (floc, Some tactic, punctation))
107 let mk_punctation punctation =
108 G.Executable (floc, G.Tactic (floc, None, punctation))
110 let mk_id punctation =
111 let tactic = G.IdTac floc in
112 mk_tactic tactic punctation
114 let mk_intros xi ids punctation =
115 let tactic = G.Intros (floc, xi, ids) in
116 mk_tactic tactic punctation
118 let mk_cut name what punctation =
119 let tactic = G.Cut (floc, Some name, what) in
120 mk_tactic tactic punctation
122 let mk_letin name what punctation =
123 let tactic = G.LetIn (floc, what, name) in
124 mk_tactic tactic punctation
126 let mk_rewrite direction what where pattern punctation =
127 let direction = if direction then `RightToLeft else `LeftToRight in
128 let pattern, rename = match where with
129 | None -> (None, [], Some pattern), []
130 | Some (premise, name) -> (None, [premise, pattern], None), [name]
132 let tactic = G.Rewrite (floc, direction, what, pattern, rename) in
133 mk_tactic tactic punctation
135 let mk_elim what using pattern punctation =
136 let pattern = None, [], Some pattern in
137 let tactic = G.Elim (floc, what, using, pattern, Some 0, []) in
138 mk_tactic tactic punctation
140 let mk_apply t punctation =
141 let tactic = G.Apply (floc, t) in
142 mk_tactic tactic punctation
144 let mk_change t where pattern punctation =
145 let pattern = match where with
146 | None -> None, [], Some pattern
147 | Some (premise, _) -> None, [premise, pattern], None
149 let tactic = G.Change (floc, pattern, t) in
150 mk_tactic tactic punctation
152 let mk_clearbody id punctation =
153 let tactic = G.ClearBody (floc, id) in
154 mk_tactic tactic punctation
157 let punctation = G.Branch floc in
158 mk_punctation punctation
160 let mk_dot = G.Dot floc
162 let mk_sc = G.Semicolon floc
164 let mk_cb = G.Merge floc
166 let mk_vb = G.Shift floc
168 (* rendering ****************************************************************)
170 let rec render_step sep a = function
171 | Note s -> mk_notenote s a
172 | Theorem (n, t, s) -> mk_theorem n t :: mk_thnote s a
173 | Qed s -> mk_qed :: mk_tacnote s a
174 | Id s -> mk_id sep :: mk_tacnote s a
175 | Intros (c, ns, s) -> mk_intros c ns sep :: mk_tacnote s a
176 | Cut (n, t, s) -> mk_cut n t sep :: mk_tacnote s a
177 | LetIn (n, t, s) -> mk_letin n t sep :: mk_tacnote s a
178 | Rewrite (b, t, w, e, s) -> mk_rewrite b t w e sep :: mk_tacnote s a
179 | Elim (t, xu, e, s) -> mk_elim t xu e sep :: mk_tacnote s a
180 | Apply (t, s) -> mk_apply t sep :: mk_tacnote s a
181 | Change (t, _, w, e, s) -> mk_change t w e sep :: mk_tacnote s a
182 | ClearBody (n, s) -> mk_clearbody n sep :: mk_tacnote s a
183 | Branch ([], s) -> a
184 | Branch ([ps], s) -> render_steps sep a ps
185 | Branch (ps :: pss, s) ->
186 let a = mk_ob :: mk_tacnote s a in
187 let a = List.fold_left (render_steps mk_vb) a (List.rev pss) in
188 mk_punctation sep :: render_steps mk_cb a ps
190 and render_steps sep a = function
192 | [p] -> render_step sep a p
193 | p :: Branch ([], _) :: ps ->
194 render_steps sep a (p :: ps)
195 | p :: ((Branch (_ :: _ :: _, _) :: _) as ps) ->
196 render_steps sep (render_step mk_sc a p) ps
198 render_steps sep (render_step mk_dot a p) ps
200 let render_steps a = render_steps mk_dot a
202 (* counting *****************************************************************)
204 let rec count_step a = function
208 | Branch (pps, _) -> List.fold_left count_steps a pps
211 and count_steps a = List.fold_left count_step a