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1 | (* Yoann Padioleau |
2 | * | |
3 | * Copyright (C) 1998-2009 Yoann Padioleau | |
34e49164 C |
4 | * |
5 | * This library is free software; you can redistribute it and/or | |
6 | * modify it under the terms of the GNU Lesser General Public License | |
7 | * version 2.1 as published by the Free Software Foundation, with the | |
8 | * special exception on linking described in file license.txt. | |
9 | * | |
10 | * This library is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the file | |
13 | * license.txt for more details. | |
14 | *) | |
15 | ||
16 | (*****************************************************************************) | |
17 | (* Notes *) | |
18 | (*****************************************************************************) | |
19 | ||
20 | ||
21 | ||
22 | (* ---------------------------------------------------------------------- *) | |
23 | (* Maybe could split common.ml and use include tricks as in ofullcommon.ml or | |
24 | * Jane Street core lib. But then harder to bundle simple scripts like my | |
25 | * make_full_linux_kernel.ml because would then need to pass all the files | |
26 | * either to ocamlc or either to some #load. Also as the code of many | |
27 | * functions depends on other functions from this common, it would | |
28 | * be tedious to add those dependencies. Here simpler (have just the | |
29 | * pb of the Prelude, but it's a small problem). | |
30 | * | |
31 | * pixel means code from Pascal Rigaux | |
32 | * julia means code from Julia Lawall | |
33 | *) | |
34 | (* ---------------------------------------------------------------------- *) | |
35 | ||
36 | (*****************************************************************************) | |
37 | (* We use *) | |
38 | (*****************************************************************************) | |
39 | (* | |
40 | * modules: | |
41 | * - Pervasives, of course | |
42 | * - List | |
43 | * - Str | |
44 | * - Hashtbl | |
45 | * - Format | |
46 | * - Buffer | |
47 | * - Unix and Sys | |
48 | * - Arg | |
49 | * | |
50 | * functions: | |
51 | * - =, <=, max min, abs, ... | |
52 | * - List.rev, List.mem, List.partition, | |
53 | * - List.fold*, List.concat, ... | |
54 | * - Str.global_replace | |
91eba41f | 55 | * - Filename.is_relative |
0708f913 | 56 | * - String.uppercase, String.lowercase |
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57 | * |
58 | * | |
59 | * The Format library allows to hide passing an indent_level variable. | |
60 | * You use as usual the print_string function except that there is | |
61 | * this automatic indent_level variable handled for you (and maybe | |
62 | * more services). src: julia in coccinelle unparse_cocci. | |
63 | * | |
64 | * Extra packages | |
65 | * - ocamlbdb | |
91eba41f | 66 | * - ocamlgtk, and gtksourceview |
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67 | * - ocamlgl |
68 | * - ocamlpython | |
69 | * - ocamlagrep | |
70 | * - ocamlfuse | |
71 | * - ocamlmpi | |
72 | * - ocamlcalendar | |
73 | * | |
91eba41f C |
74 | * - pcre |
75 | * - sdl | |
76 | * | |
77 | * Many functions in this file were inspired by Haskell or Lisp librairies. | |
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78 | *) |
79 | ||
80 | (*****************************************************************************) | |
81 | (* Prelude *) | |
82 | (*****************************************************************************) | |
83 | ||
84 | (* The following functions should be in their respective sections but | |
85 | * because some functions in some sections use functions in other | |
86 | * sections, and because I don't want to take care of the order of | |
87 | * those sections, of those dependencies, I put the functions causing | |
88 | * dependency problem here. C is better than caml on this with the | |
89 | * ability to declare prototype, enabling some form of forward | |
90 | * reference. *) | |
91 | ||
92 | let (+>) o f = f o | |
93 | let (++) = (@) | |
94 | ||
95 | exception Timeout | |
96 | exception UnixExit of int | |
97 | ||
98 | let rec (do_n: int -> (unit -> unit) -> unit) = fun i f -> | |
99 | if i = 0 then () else (f(); do_n (i-1) f) | |
100 | let rec (foldn: ('a -> int -> 'a) -> 'a -> int -> 'a) = fun f acc i -> | |
101 | if i = 0 then acc else foldn f (f acc i) (i-1) | |
102 | ||
103 | let sum_int = List.fold_left (+) 0 | |
104 | ||
105 | (* could really call it 'for' :) *) | |
106 | let fold_left_with_index f acc = | |
107 | let rec fold_lwi_aux acc n = function | |
108 | | [] -> acc | |
109 | | x::xs -> fold_lwi_aux (f acc x n) (n+1) xs | |
110 | in fold_lwi_aux acc 0 | |
111 | ||
112 | ||
113 | let rec drop n xs = | |
114 | match (n,xs) with | |
115 | | (0,_) -> xs | |
116 | | (_,[]) -> failwith "drop: not enough" | |
117 | | (n,x::xs) -> drop (n-1) xs | |
118 | ||
119 | let rec enum_orig x n = if x = n then [n] else x::enum_orig (x+1) n | |
120 | ||
121 | let enum x n = | |
122 | if not(x <= n) | |
123 | then failwith (Printf.sprintf "bad values in enum, expect %d <= %d" x n); | |
124 | let rec enum_aux acc x n = | |
125 | if x = n then n::acc else enum_aux (x::acc) (x+1) n | |
126 | in | |
127 | List.rev (enum_aux [] x n) | |
128 | ||
129 | let rec take n xs = | |
130 | match (n,xs) with | |
131 | | (0,_) -> [] | |
132 | | (_,[]) -> failwith "take: not enough" | |
133 | | (n,x::xs) -> x::take (n-1) xs | |
134 | ||
135 | ||
136 | let last_n n l = List.rev (take n (List.rev l)) | |
137 | let last l = List.hd (last_n 1 l) | |
138 | ||
139 | ||
140 | let (list_of_string: string -> char list) = function | |
141 | "" -> [] | |
142 | | s -> (enum 0 ((String.length s) - 1) +> List.map (String.get s)) | |
143 | ||
144 | let (lines: string -> string list) = fun s -> | |
145 | let rec lines_aux = function | |
146 | | [] -> [] | |
147 | | [x] -> if x = "" then [] else [x] | |
148 | | x::xs -> | |
149 | x::lines_aux xs | |
150 | in | |
151 | Str.split_delim (Str.regexp "\n") s +> lines_aux | |
152 | ||
153 | ||
154 | let push2 v l = | |
155 | l := v :: !l | |
156 | ||
b1b2de81 | 157 | let null xs = match xs with [] -> true | _ -> false |
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158 | |
159 | ||
160 | ||
161 | ||
162 | let debugger = ref false | |
163 | ||
164 | let unwind_protect f cleanup = | |
165 | if !debugger then f() else | |
166 | try f () | |
167 | with e -> begin cleanup e; raise e end | |
168 | ||
169 | let finalize f cleanup = | |
170 | if !debugger then f() else | |
171 | try | |
172 | let res = f () in | |
173 | cleanup (); | |
174 | res | |
175 | with e -> | |
176 | cleanup (); | |
177 | raise e | |
178 | ||
179 | let command2 s = ignore(Sys.command s) | |
180 | ||
181 | ||
182 | let (matched: int -> string -> string) = fun i s -> | |
183 | Str.matched_group i s | |
184 | ||
185 | let matched1 = fun s -> matched 1 s | |
186 | let matched2 = fun s -> (matched 1 s, matched 2 s) | |
187 | let matched3 = fun s -> (matched 1 s, matched 2 s, matched 3 s) | |
188 | let matched4 = fun s -> (matched 1 s, matched 2 s, matched 3 s, matched 4 s) | |
189 | let matched5 = fun s -> (matched 1 s, matched 2 s, matched 3 s, matched 4 s, matched 5 s) | |
190 | let matched6 = fun s -> (matched 1 s, matched 2 s, matched 3 s, matched 4 s, matched 5 s, matched 6 s) | |
191 | let matched7 = fun s -> (matched 1 s, matched 2 s, matched 3 s, matched 4 s, matched 5 s, matched 6 s, matched 7 s) | |
192 | ||
193 | let (with_open_stringbuf: (((string -> unit) * Buffer.t) -> unit) -> string) = | |
194 | fun f -> | |
195 | let buf = Buffer.create 1000 in | |
196 | let pr s = Buffer.add_string buf (s ^ "\n") in | |
197 | f (pr, buf); | |
198 | Buffer.contents buf | |
199 | ||
200 | ||
485bce71 C |
201 | let foldl1 p = function x::xs -> List.fold_left p x xs | _ -> failwith "foldl1" |
202 | ||
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203 | (*****************************************************************************) |
204 | (* Debugging/logging *) | |
205 | (*****************************************************************************) | |
206 | ||
207 | (* I used this in coccinelle where the huge logging of stuff ask for | |
208 | * a more organized solution that use more visual indentation hints. | |
209 | * | |
210 | * todo? could maybe use log4j instead ? or use Format module more | |
211 | * consistently ? | |
212 | *) | |
213 | ||
214 | let _tab_level_print = ref 0 | |
215 | let _tab_indent = 5 | |
216 | ||
217 | ||
218 | let _prefix_pr = ref "" | |
219 | ||
220 | let indent_do f = | |
221 | _tab_level_print := !_tab_level_print + _tab_indent; | |
222 | finalize f | |
223 | (fun () -> _tab_level_print := !_tab_level_print - _tab_indent;) | |
224 | ||
225 | ||
226 | let pr s = | |
227 | print_string !_prefix_pr; | |
228 | do_n !_tab_level_print (fun () -> print_string " "); | |
229 | print_string s; | |
230 | print_string "\n"; | |
231 | flush stdout | |
232 | ||
233 | let pr_no_nl s = | |
234 | print_string !_prefix_pr; | |
235 | do_n !_tab_level_print (fun () -> print_string " "); | |
236 | print_string s; | |
237 | flush stdout | |
238 | ||
239 | ||
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240 | |
241 | ||
242 | ||
243 | ||
244 | let _chan_pr2 = ref (None: out_channel option) | |
245 | ||
246 | let out_chan_pr2 ?(newline=true) s = | |
247 | match !_chan_pr2 with | |
248 | | None -> () | |
249 | | Some chan -> | |
250 | output_string chan (s ^ (if newline then "\n" else "")); | |
251 | flush chan | |
252 | ||
253 | ||
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254 | let pr2 s = |
255 | prerr_string !_prefix_pr; | |
256 | do_n !_tab_level_print (fun () -> prerr_string " "); | |
257 | prerr_string s; | |
258 | prerr_string "\n"; | |
708f4980 C |
259 | flush stderr; |
260 | out_chan_pr2 s; | |
261 | () | |
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262 | |
263 | let pr2_no_nl s = | |
264 | prerr_string !_prefix_pr; | |
265 | do_n !_tab_level_print (fun () -> prerr_string " "); | |
266 | prerr_string s; | |
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267 | flush stderr; |
268 | out_chan_pr2 ~newline:false s; | |
269 | () | |
270 | ||
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271 | |
272 | let pr_xxxxxxxxxxxxxxxxx () = | |
273 | pr "-----------------------------------------------------------------------" | |
274 | ||
275 | let pr2_xxxxxxxxxxxxxxxxx () = | |
276 | pr2 "-----------------------------------------------------------------------" | |
277 | ||
278 | ||
279 | let reset_pr_indent () = | |
280 | _tab_level_print := 0 | |
281 | ||
282 | (* old: | |
283 | * let pr s = (print_string s; print_string "\n"; flush stdout) | |
284 | * let pr2 s = (prerr_string s; prerr_string "\n"; flush stderr) | |
285 | *) | |
286 | ||
287 | (* ---------------------------------------------------------------------- *) | |
288 | ||
289 | (* I can not use the _xxx ref tech that I use for common_extra.ml here because | |
290 | * ocaml don't like the polymorphism of Dumper mixed with refs. | |
291 | * | |
292 | * let (_dump_func : ('a -> string) ref) = ref | |
293 | * (fun x -> failwith "no dump yet, have you included common_extra.cmo?") | |
294 | * let (dump : 'a -> string) = fun x -> | |
295 | * !_dump_func x | |
296 | * | |
297 | * So I have included directly dumper.ml in common.ml. It's more practical | |
298 | * when want to give script that use my common.ml, I just have to give | |
299 | * this file. | |
300 | *) | |
301 | ||
302 | (* start of dumper.ml *) | |
303 | ||
304 | (* Dump an OCaml value into a printable string. | |
305 | * By Richard W.M. Jones (rich@annexia.org). | |
306 | * dumper.ml 1.2 2005/02/06 12:38:21 rich Exp | |
307 | *) | |
308 | open Printf | |
309 | open Obj | |
310 | ||
311 | let rec dump r = | |
312 | if is_int r then | |
313 | string_of_int (magic r : int) | |
314 | else ( (* Block. *) | |
315 | let rec get_fields acc = function | |
316 | | 0 -> acc | |
317 | | n -> let n = n-1 in get_fields (field r n :: acc) n | |
318 | in | |
319 | let rec is_list r = | |
320 | if is_int r then ( | |
321 | if (magic r : int) = 0 then true (* [] *) | |
322 | else false | |
323 | ) else ( | |
324 | let s = size r and t = tag r in | |
325 | if t = 0 && s = 2 then is_list (field r 1) (* h :: t *) | |
326 | else false | |
327 | ) | |
328 | in | |
329 | let rec get_list r = | |
330 | if is_int r then [] | |
331 | else let h = field r 0 and t = get_list (field r 1) in h :: t | |
332 | in | |
333 | let opaque name = | |
334 | (* XXX In future, print the address of value 'r'. Not possible in | |
335 | * pure OCaml at the moment. | |
336 | *) | |
337 | "<" ^ name ^ ">" | |
338 | in | |
339 | ||
340 | let s = size r and t = tag r in | |
341 | ||
342 | (* From the tag, determine the type of block. *) | |
343 | if is_list r then ( (* List. *) | |
344 | let fields = get_list r in | |
345 | "[" ^ String.concat "; " (List.map dump fields) ^ "]" | |
346 | ) | |
347 | else if t = 0 then ( (* Tuple, array, record. *) | |
348 | let fields = get_fields [] s in | |
349 | "(" ^ String.concat ", " (List.map dump fields) ^ ")" | |
350 | ) | |
351 | ||
352 | (* Note that [lazy_tag .. forward_tag] are < no_scan_tag. Not | |
353 | * clear if very large constructed values could have the same | |
354 | * tag. XXX *) | |
355 | else if t = lazy_tag then opaque "lazy" | |
356 | else if t = closure_tag then opaque "closure" | |
357 | else if t = object_tag then ( (* Object. *) | |
358 | let fields = get_fields [] s in | |
359 | let clasz, id, slots = | |
360 | match fields with h::h'::t -> h, h', t | _ -> assert false in | |
361 | (* No information on decoding the class (first field). So just print | |
362 | * out the ID and the slots. | |
363 | *) | |
364 | "Object #" ^ dump id ^ | |
365 | " (" ^ String.concat ", " (List.map dump slots) ^ ")" | |
366 | ) | |
367 | else if t = infix_tag then opaque "infix" | |
368 | else if t = forward_tag then opaque "forward" | |
369 | ||
370 | else if t < no_scan_tag then ( (* Constructed value. *) | |
371 | let fields = get_fields [] s in | |
372 | "Tag" ^ string_of_int t ^ | |
373 | " (" ^ String.concat ", " (List.map dump fields) ^ ")" | |
374 | ) | |
375 | else if t = string_tag then ( | |
376 | "\"" ^ String.escaped (magic r : string) ^ "\"" | |
377 | ) | |
378 | else if t = double_tag then ( | |
379 | string_of_float (magic r : float) | |
380 | ) | |
381 | else if t = abstract_tag then opaque "abstract" | |
382 | else if t = custom_tag then opaque "custom" | |
383 | else if t = final_tag then opaque "final" | |
384 | else failwith ("dump: impossible tag (" ^ string_of_int t ^ ")") | |
385 | ) | |
386 | ||
387 | let dump v = dump (repr v) | |
388 | ||
389 | (* end of dumper.ml *) | |
390 | ||
391 | (* | |
392 | let (dump : 'a -> string) = fun x -> | |
393 | Dumper.dump x | |
394 | *) | |
395 | ||
396 | ||
397 | (* ---------------------------------------------------------------------- *) | |
398 | let pr2_gen x = pr2 (dump x) | |
399 | ||
400 | ||
401 | ||
402 | (* ---------------------------------------------------------------------- *) | |
403 | ||
404 | ||
405 | let _already_printed = Hashtbl.create 101 | |
406 | let disable_pr2_once = ref false | |
708f4980 C |
407 | |
408 | let xxx_once f s = | |
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409 | if !disable_pr2_once then pr2 s |
410 | else | |
411 | if not (Hashtbl.mem _already_printed s) | |
412 | then begin | |
413 | Hashtbl.add _already_printed s true; | |
708f4980 | 414 | f ("(ONCE) " ^ s); |
34e49164 C |
415 | end |
416 | ||
708f4980 C |
417 | let pr2_once s = xxx_once pr2 s |
418 | ||
419 | (* ---------------------------------------------------------------------- *) | |
978fd7e5 C |
420 | let mk_pr2_wrappers aref = |
421 | let fpr2 s = | |
708f4980 C |
422 | if !aref |
423 | then pr2 s | |
978fd7e5 | 424 | else |
708f4980 C |
425 | (* just to the log file *) |
426 | out_chan_pr2 s | |
427 | in | |
978fd7e5 | 428 | let fpr2_once s = |
708f4980 C |
429 | if !aref |
430 | then pr2_once s | |
978fd7e5 | 431 | else |
708f4980 C |
432 | xxx_once out_chan_pr2 s |
433 | in | |
978fd7e5 | 434 | fpr2, fpr2_once |
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435 | |
436 | (* ---------------------------------------------------------------------- *) | |
437 | (* could also be in File section *) | |
438 | ||
978fd7e5 C |
439 | let redirect_stdout file f = |
440 | begin | |
441 | let chan = open_out file in | |
442 | let descr = Unix.descr_of_out_channel chan in | |
443 | ||
444 | let saveout = Unix.dup Unix.stdout in | |
445 | Unix.dup2 descr Unix.stdout; | |
446 | flush stdout; | |
447 | let res = f() in | |
448 | flush stdout; | |
449 | Unix.dup2 saveout Unix.stdout; | |
450 | close_out chan; | |
451 | res | |
452 | end | |
453 | ||
454 | let redirect_stdout_opt optfile f = | |
455 | match optfile with | |
456 | | None -> f() | |
457 | | Some outfile -> redirect_stdout outfile f | |
458 | ||
459 | let redirect_stdout_stderr file f = | |
34e49164 C |
460 | begin |
461 | let chan = open_out file in | |
462 | let descr = Unix.descr_of_out_channel chan in | |
463 | ||
464 | let saveout = Unix.dup Unix.stdout in | |
465 | let saveerr = Unix.dup Unix.stderr in | |
466 | Unix.dup2 descr Unix.stdout; | |
467 | Unix.dup2 descr Unix.stderr; | |
468 | flush stdout; flush stderr; | |
469 | f(); | |
470 | flush stdout; flush stderr; | |
471 | Unix.dup2 saveout Unix.stdout; | |
472 | Unix.dup2 saveerr Unix.stderr; | |
473 | close_out chan; | |
474 | end | |
475 | ||
978fd7e5 | 476 | let redirect_stdin file f = |
34e49164 C |
477 | begin |
478 | let chan = open_in file in | |
479 | let descr = Unix.descr_of_in_channel chan in | |
480 | ||
481 | let savein = Unix.dup Unix.stdin in | |
482 | Unix.dup2 descr Unix.stdin; | |
483 | f(); | |
484 | Unix.dup2 savein Unix.stdin; | |
485 | close_in chan; | |
486 | end | |
487 | ||
978fd7e5 | 488 | let redirect_stdin_opt optfile f = |
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489 | match optfile with |
490 | | None -> f() | |
491 | | Some infile -> redirect_stdin infile f | |
492 | ||
493 | ||
708f4980 C |
494 | (* cf end |
495 | let with_pr2_to_string f = | |
496 | *) | |
497 | ||
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498 | |
499 | (* ---------------------------------------------------------------------- *) | |
500 | ||
501 | include Printf | |
502 | ||
503 | (* cf common.mli, fprintf, printf, eprintf, sprintf. | |
504 | * also what is this ? | |
505 | * val bprintf : Buffer.t -> ('a, Buffer.t, unit) format -> 'a | |
506 | * val kprintf : (string -> 'a) -> ('b, unit, string, 'a) format4 -> 'b | |
507 | *) | |
508 | ||
509 | (* ex of printf: | |
510 | * printf "%02d" i | |
511 | * for padding | |
512 | *) | |
513 | ||
514 | let spf = sprintf | |
515 | ||
516 | (* ---------------------------------------------------------------------- *) | |
517 | ||
518 | let _chan = ref stderr | |
519 | let start_log_file () = | |
520 | let filename = (spf "/tmp/debugml%d:%d" (Unix.getuid()) (Unix.getpid())) in | |
521 | pr2 (spf "now using %s for logging" filename); | |
522 | _chan := open_out filename | |
523 | ||
524 | ||
525 | let dolog s = output_string !_chan (s ^ "\n"); flush !_chan | |
526 | ||
527 | let verbose_level = ref 1 | |
528 | let log s = if !verbose_level >= 1 then dolog s | |
529 | let log2 s = if !verbose_level >= 2 then dolog s | |
530 | let log3 s = if !verbose_level >= 3 then dolog s | |
531 | let log4 s = if !verbose_level >= 4 then dolog s | |
532 | ||
533 | let if_log f = if !verbose_level >= 1 then f() | |
534 | let if_log2 f = if !verbose_level >= 2 then f() | |
535 | let if_log3 f = if !verbose_level >= 3 then f() | |
536 | let if_log4 f = if !verbose_level >= 4 then f() | |
537 | ||
538 | (* ---------------------------------------------------------------------- *) | |
539 | ||
540 | let pause () = (pr2 "pause: type return"; ignore(read_line ())) | |
541 | ||
542 | (* src: from getopt from frish *) | |
543 | let bip () = Printf.printf "\007"; flush stdout | |
544 | let wait () = Unix.sleep 1 | |
545 | ||
546 | (* was used by fix_caml *) | |
547 | let _trace_var = ref 0 | |
548 | let add_var() = incr _trace_var | |
549 | let dec_var() = decr _trace_var | |
550 | let get_var() = !_trace_var | |
551 | ||
552 | let (print_n: int -> string -> unit) = fun i s -> | |
553 | do_n i (fun () -> print_string s) | |
554 | let (printerr_n: int -> string -> unit) = fun i s -> | |
555 | do_n i (fun () -> prerr_string s) | |
556 | ||
557 | let _debug = ref true | |
558 | let debugon () = _debug := true | |
559 | let debugoff () = _debug := false | |
560 | let debug f = if !_debug then f () else () | |
561 | ||
562 | ||
563 | ||
564 | (* now in prelude: | |
565 | * let debugger = ref false | |
566 | *) | |
567 | ||
568 | ||
569 | (*****************************************************************************) | |
570 | (* Profiling *) | |
571 | (*****************************************************************************) | |
572 | ||
573 | let get_mem() = | |
574 | command2("grep VmData /proc/" ^ string_of_int (Unix.getpid()) ^ "/status") | |
575 | ||
576 | let memory_stat () = | |
577 | let stat = Gc.stat() in | |
578 | let conv_mo x = x * 4 / 1000000 in | |
579 | Printf.sprintf "maximal = %d Mo\n" (conv_mo stat.Gc.top_heap_words) ^ | |
580 | Printf.sprintf "current = %d Mo\n" (conv_mo stat.Gc.heap_words) ^ | |
581 | Printf.sprintf "lives = %d Mo\n" (conv_mo stat.Gc.live_words) | |
582 | (* Printf.printf "fragments = %d Mo\n" (conv_mo stat.Gc.fragments); *) | |
583 | ||
584 | let timenow () = | |
585 | "sys:" ^ (string_of_float (Sys.time ())) ^ " seconds" ^ | |
586 | ":real:" ^ | |
587 | (let tm = Unix.time () +> Unix.gmtime in | |
588 | tm.Unix.tm_min +> string_of_int ^ " min:" ^ | |
589 | tm.Unix.tm_sec +> string_of_int ^ ".00 seconds") | |
590 | ||
591 | let _count1 = ref 0 | |
592 | let _count2 = ref 0 | |
593 | let _count3 = ref 0 | |
594 | let _count4 = ref 0 | |
595 | let _count5 = ref 0 | |
596 | ||
597 | let count1 () = incr _count1 | |
598 | let count2 () = incr _count2 | |
599 | let count3 () = incr _count3 | |
600 | let count4 () = incr _count4 | |
601 | let count5 () = incr _count5 | |
602 | ||
603 | let profile_diagnostic_basic () = | |
604 | Printf.sprintf | |
605 | "count1 = %d\ncount2 = %d\ncount3 = %d\ncount4 = %d\ncount5 = %d\n" | |
606 | !_count1 !_count2 !_count3 !_count4 !_count5 | |
607 | ||
608 | ||
609 | ||
610 | let time_func f = | |
611 | (* let _ = Timing () in *) | |
612 | let x = f () in | |
613 | (* let _ = Timing () in *) | |
614 | x | |
615 | ||
616 | (* ---------------------------------------------------------------------- *) | |
617 | ||
618 | type prof = PALL | PNONE | PSOME of string list | |
619 | let profile = ref PNONE | |
485bce71 | 620 | let show_trace_profile = ref false |
34e49164 C |
621 | |
622 | let check_profile category = | |
623 | match !profile with | |
624 | PALL -> true | |
625 | | PNONE -> false | |
626 | | PSOME l -> List.mem category l | |
627 | ||
628 | let _profile_table = ref (Hashtbl.create 100) | |
485bce71 C |
629 | |
630 | let adjust_profile_entry category difftime = | |
631 | let (xtime, xcount) = | |
632 | (try Hashtbl.find !_profile_table category | |
633 | with Not_found -> | |
634 | let xtime = ref 0.0 in | |
635 | let xcount = ref 0 in | |
636 | Hashtbl.add !_profile_table category (xtime, xcount); | |
637 | (xtime, xcount) | |
638 | ) in | |
639 | xtime := !xtime +. difftime; | |
640 | xcount := !xcount + 1; | |
641 | () | |
642 | ||
34e49164 C |
643 | let profile_start category = failwith "todo" |
644 | let profile_end category = failwith "todo" | |
645 | ||
485bce71 | 646 | |
34e49164 C |
647 | (* subtil: don't forget to give all argumens to f, otherwise partial app |
648 | * and will profile nothing. | |
0708f913 C |
649 | * |
650 | * todo: try also detect when complexity augment each time, so can | |
651 | * detect the situation for a function gets worse and worse ? | |
34e49164 C |
652 | *) |
653 | let profile_code category f = | |
654 | if not (check_profile category) | |
fc1ad971 | 655 | then f() |
34e49164 | 656 | else begin |
485bce71 | 657 | if !show_trace_profile then pr2 (spf "p: %s" category); |
34e49164 C |
658 | let t = Unix.gettimeofday () in |
659 | let res, prefix = | |
660 | try Some (f ()), "" | |
661 | with Timeout -> None, "*" | |
662 | in | |
663 | let category = prefix ^ category in (* add a '*' to indicate timeout func *) | |
664 | let t' = Unix.gettimeofday () in | |
485bce71 C |
665 | |
666 | adjust_profile_entry category (t' -. t); | |
34e49164 C |
667 | (match res with |
668 | | Some res -> res | |
669 | | None -> raise Timeout | |
670 | ); | |
671 | end | |
672 | ||
485bce71 C |
673 | |
674 | let _is_in_exclusif = ref (None: string option) | |
675 | ||
676 | let profile_code_exclusif category f = | |
677 | if not (check_profile category) | |
678 | then f() | |
679 | else begin | |
680 | ||
681 | match !_is_in_exclusif with | |
682 | | Some s -> | |
683 | failwith (spf "profile_code_exclusif: %s but already in %s " category s); | |
684 | | None -> | |
685 | _is_in_exclusif := (Some category); | |
686 | finalize | |
687 | (fun () -> | |
688 | profile_code category f | |
689 | ) | |
690 | (fun () -> | |
691 | _is_in_exclusif := None | |
692 | ) | |
693 | ||
694 | end | |
695 | ||
696 | let profile_code_inside_exclusif_ok category f = | |
697 | failwith "Todo" | |
698 | ||
699 | ||
34e49164 C |
700 | (* todo: also put % ? also add % to see if coherent numbers *) |
701 | let profile_diagnostic () = | |
702 | if !profile = PNONE then "" else | |
703 | let xs = | |
704 | Hashtbl.fold (fun k v acc -> (k,v)::acc) !_profile_table [] | |
705 | +> List.sort (fun (k1, (t1,n1)) (k2, (t2,n2)) -> compare t2 t1) | |
706 | in | |
707 | with_open_stringbuf (fun (pr,_) -> | |
708 | pr "---------------------"; | |
709 | pr "profiling result"; | |
710 | pr "---------------------"; | |
711 | xs +> List.iter (fun (k, (t,n)) -> | |
712 | pr (sprintf "%-40s : %10.3f sec %10d count" k !t !n) | |
713 | ) | |
714 | ) | |
715 | ||
716 | ||
717 | ||
718 | let report_if_take_time timethreshold s f = | |
719 | let t = Unix.gettimeofday () in | |
720 | let res = f () in | |
721 | let t' = Unix.gettimeofday () in | |
722 | if (t' -. t > float_of_int timethreshold) | |
978fd7e5 | 723 | then pr2 (sprintf "Note: processing took %7.1fs: %s" (t' -. t) s); |
34e49164 C |
724 | res |
725 | ||
726 | let profile_code2 category f = | |
727 | profile_code category (fun () -> | |
728 | if !profile = PALL | |
729 | then pr2 ("starting: " ^ category); | |
730 | let t = Unix.gettimeofday () in | |
731 | let res = f () in | |
732 | let t' = Unix.gettimeofday () in | |
733 | if !profile = PALL | |
734 | then pr2 (spf "ending: %s, %fs" category (t' -. t)); | |
735 | res | |
736 | ) | |
737 | ||
738 | ||
739 | (*****************************************************************************) | |
740 | (* Test *) | |
741 | (*****************************************************************************) | |
742 | let example b = assert b | |
743 | ||
744 | let _ex1 = example (enum 1 4 = [1;2;3;4]) | |
745 | ||
746 | let assert_equal a b = | |
747 | if not (a = b) | |
748 | then failwith ("assert_equal: those 2 values are not equal:\n\t" ^ | |
749 | (dump a) ^ "\n\t" ^ (dump b) ^ "\n") | |
750 | ||
751 | let (example2: string -> bool -> unit) = fun s b -> | |
752 | try assert b with x -> failwith s | |
753 | ||
754 | (*-------------------------------------------------------------------*) | |
755 | let _list_bool = ref [] | |
756 | ||
757 | let (example3: string -> bool -> unit) = fun s b -> | |
758 | _list_bool := (s,b)::(!_list_bool) | |
759 | ||
760 | (* could introduce a fun () otherwise the calculus is made at compile time | |
761 | * and this can be long. This would require to redefine test_all. | |
762 | * let (example3: string -> (unit -> bool) -> unit) = fun s func -> | |
763 | * _list_bool := (s,func):: (!_list_bool) | |
764 | * | |
765 | * I would like to do as a func that take 2 terms, and make an = over it | |
766 | * avoid to add this ugly fun (), but pb of type, cant do that :( | |
767 | *) | |
768 | ||
769 | ||
770 | let (test_all: unit -> unit) = fun () -> | |
771 | List.iter (fun (s, b) -> | |
772 | Printf.printf "%s: %s\n" s (if b then "passed" else "failed") | |
773 | ) !_list_bool | |
774 | ||
775 | let (test: string -> unit) = fun s -> | |
776 | Printf.printf "%s: %s\n" s | |
777 | (if (List.assoc s (!_list_bool)) then "passed" else "failed") | |
778 | ||
779 | let _ex = example3 "++" ([1;2]++[3;4;5] = [1;2;3;4;5]) | |
780 | ||
781 | (*-------------------------------------------------------------------*) | |
782 | (* Regression testing *) | |
783 | (*-------------------------------------------------------------------*) | |
784 | ||
785 | (* cf end of file. It uses too many other common functions so I | |
786 | * have put the code at the end of this file. | |
787 | *) | |
788 | ||
789 | ||
790 | ||
791 | (* todo? take code from julien signoles in calendar-2.0.2/tests *) | |
792 | (* | |
793 | ||
794 | (* Generic functions used in the tests. *) | |
795 | ||
796 | val reset : unit -> unit | |
797 | val nb_ok : unit -> int | |
798 | val nb_bug : unit -> int | |
799 | val test : bool -> string -> unit | |
800 | val test_exn : 'a Lazy.t -> string -> unit | |
801 | ||
802 | ||
803 | let ok_ref = ref 0 | |
804 | let ok () = incr ok_ref | |
805 | let nb_ok () = !ok_ref | |
806 | ||
807 | let bug_ref = ref 0 | |
808 | let bug () = incr bug_ref | |
809 | let nb_bug () = !bug_ref | |
810 | ||
811 | let reset () = | |
812 | ok_ref := 0; | |
813 | bug_ref := 0 | |
814 | ||
815 | let test x s = | |
816 | if x then ok () else begin Printf.printf "%s\n" s; bug () end;; | |
817 | ||
818 | let test_exn x s = | |
819 | try | |
820 | ignore (Lazy.force x); | |
821 | Printf.printf "%s\n" s; | |
822 | bug () | |
823 | with _ -> | |
824 | ok ();; | |
825 | *) | |
826 | ||
827 | ||
828 | (*****************************************************************************) | |
829 | (* Quickcheck like (sfl) *) | |
830 | (*****************************************************************************) | |
831 | ||
832 | (* Better than quickcheck, cos cant do a test_all_prop in haskell cos | |
833 | * prop were functions, whereas here we have not prop_Unix x = ... but | |
834 | * laws "unit" ... | |
835 | * | |
836 | * How to do without overloading ? objet ? can pass a generator as a | |
837 | * parameter, mais lourd, prefer automatic inferring of the | |
838 | * generator? But at the same time quickcheck does not do better cos | |
839 | * we must explictly type the property. So between a | |
840 | * prop_unit:: [Int] -> [Int] -> bool ... | |
841 | * prop_unit x = reverse [x] == [x] | |
842 | * and | |
843 | * let _ = laws "unit" (fun x -> reverse [x] = [x]) (listg intg) | |
844 | * there is no real differences. | |
845 | * | |
846 | * Yes I define typeg generator but quickcheck too, he must define | |
847 | * class instance. I emulate the context Gen a => Gen [a] by making | |
848 | * listg take as a param a type generator. Moreover I have not the pb of | |
849 | * monad. I can do random independently, so my code is more simple | |
850 | * I think than the haskell code of quickcheck. | |
851 | * | |
852 | * update: apparently Jane Street have copied some of my code for their | |
853 | * Ounit_util.ml and quichcheck.ml in their Core library :) | |
854 | *) | |
855 | ||
856 | (*---------------------------------------------------------------------------*) | |
857 | (* generators *) | |
858 | (*---------------------------------------------------------------------------*) | |
859 | type 'a gen = unit -> 'a | |
860 | ||
861 | let (ig: int gen) = fun () -> | |
862 | Random.int 10 | |
863 | let (lg: ('a gen) -> ('a list) gen) = fun gen () -> | |
864 | foldn (fun acc i -> (gen ())::acc) [] (Random.int 10) | |
865 | let (pg: ('a gen) -> ('b gen) -> ('a * 'b) gen) = fun gen1 gen2 () -> | |
866 | (gen1 (), gen2 ()) | |
867 | let polyg = ig | |
868 | let (ng: (string gen)) = fun () -> | |
869 | "a" ^ (string_of_int (ig ())) | |
870 | ||
871 | let (oneofl: ('a list) -> 'a gen) = fun xs () -> | |
872 | List.nth xs (Random.int (List.length xs)) | |
873 | (* let oneofl l = oneof (List.map always l) *) | |
874 | ||
875 | let (oneof: (('a gen) list) -> 'a gen) = fun xs -> | |
876 | List.nth xs (Random.int (List.length xs)) | |
877 | ||
878 | let (always: 'a -> 'a gen) = fun e () -> e | |
879 | ||
880 | let (frequency: ((int * ('a gen)) list) -> 'a gen) = fun xs -> | |
881 | let sums = sum_int (List.map fst xs) in | |
882 | let i = Random.int sums in | |
883 | let rec freq_aux acc = function | |
884 | | (x,g)::xs -> if i < acc+x then g else freq_aux (acc+x) xs | |
885 | | _ -> failwith "frequency" | |
886 | in | |
887 | freq_aux 0 xs | |
888 | let frequencyl l = frequency (List.map (fun (i,e) -> (i,always e)) l) | |
889 | ||
890 | (* | |
891 | let b = oneof [always true; always false] () | |
892 | let b = frequency [3, always true; 2, always false] () | |
893 | *) | |
894 | ||
895 | (* cant do this: | |
896 | * let rec (lg: ('a gen) -> ('a list) gen) = fun gen -> oneofl [[]; lg gen ()] | |
897 | * nor | |
898 | * let rec (lg: ('a gen) -> ('a list) gen) = fun gen -> oneof [always []; lg gen] | |
899 | * | |
900 | * because caml is not as lazy as haskell :( fix the pb by introducing a size | |
901 | * limit. take the bounds/size as parameter. morover this is needed for | |
902 | * more complex type. | |
903 | * | |
904 | * how make a bintreeg ?? we need recursion | |
905 | * | |
906 | * let rec (bintreeg: ('a gen) -> ('a bintree) gen) = fun gen () -> | |
907 | * let rec aux n = | |
908 | * if n = 0 then (Leaf (gen ())) | |
909 | * else frequencyl [1, Leaf (gen ()); 4, Branch ((aux (n / 2)), aux (n / 2))] | |
910 | * () | |
911 | * in aux 20 | |
912 | * | |
913 | *) | |
914 | ||
915 | ||
916 | (*---------------------------------------------------------------------------*) | |
917 | (* property *) | |
918 | (*---------------------------------------------------------------------------*) | |
919 | ||
920 | (* todo: a test_all_laws, better syntax (done already a little with ig in | |
921 | * place of intg. En cas d'erreur, print the arg that not respect | |
922 | * | |
923 | * todo: with monitoring, as in haskell, laws = laws2, no need for 2 func, | |
924 | * but hard i found | |
925 | * | |
926 | * todo classify, collect, forall | |
927 | *) | |
928 | ||
929 | ||
930 | (* return None when good, and Just the_problematic_case when bad *) | |
931 | let (laws: string -> ('a -> bool) -> ('a gen) -> 'a option) = fun s func gen -> | |
932 | let res = foldn (fun acc i -> let n = gen() in (n, func n)::acc) [] 1000 in | |
933 | let res = List.filter (fun (x,b) -> not b) res in | |
934 | if res = [] then None else Some (fst (List.hd res)) | |
935 | ||
936 | let rec (statistic_number: ('a list) -> (int * 'a) list) = function | |
937 | | [] -> [] | |
938 | | x::xs -> let (splitg, splitd) = List.partition (fun y -> y = x) xs in | |
939 | (1+(List.length splitg), x)::(statistic_number splitd) | |
940 | ||
941 | (* in pourcentage *) | |
942 | let (statistic: ('a list) -> (int * 'a) list) = fun xs -> | |
943 | let stat_num = statistic_number xs in | |
944 | let totals = sum_int (List.map fst stat_num) in | |
945 | List.map (fun (i, v) -> ((i * 100) / totals), v) stat_num | |
946 | ||
947 | let (laws2: | |
948 | string -> ('a -> (bool * 'b)) -> ('a gen) -> | |
949 | ('a option * ((int * 'b) list ))) = | |
950 | fun s func gen -> | |
951 | let res = foldn (fun acc i -> let n = gen() in (n, func n)::acc) [] 1000 in | |
952 | let stat = statistic (List.map (fun (x,(b,v)) -> v) res) in | |
953 | let res = List.filter (fun (x,(b,v)) -> not b) res in | |
954 | if res = [] then (None, stat) else (Some (fst (List.hd res)), stat) | |
955 | ||
956 | ||
957 | (* | |
958 | let b = laws "unit" (fun x -> reverse [x] = [x] )ig | |
959 | let b = laws "app " (fun (xs,ys) -> reverse (xs++ys) = reverse ys++reverse xs)(pg (lg ig)(lg ig)) | |
960 | let b = laws "rev " (fun xs -> reverse (reverse xs) = xs )(lg ig) | |
961 | let b = laws "appb" (fun (xs,ys) -> reverse (xs++ys) = reverse xs++reverse ys)(pg (lg ig)(lg ig)) | |
962 | let b = laws "max" (fun (x,y) -> x <= y ==> (max x y = y) )(pg ig ig) | |
963 | ||
964 | let b = laws2 "max" (fun (x,y) -> ((x <= y ==> (max x y = y)), x <= y))(pg ig ig) | |
965 | *) | |
966 | ||
967 | ||
968 | (* todo, do with coarbitrary ?? idea is that given a 'a, generate a 'b | |
969 | * depending of 'a and gen 'b, that is modify gen 'b, what is important is | |
970 | * that each time given the same 'a, we must get the same 'b !!! | |
971 | *) | |
972 | ||
973 | (* | |
974 | let (fg: ('a gen) -> ('b gen) -> ('a -> 'b) gen) = fun gen1 gen2 () -> | |
975 | let b = laws "funs" (fun (f,g,h) -> x <= y ==> (max x y = y) )(pg ig ig) | |
976 | *) | |
977 | ||
978 | (* | |
979 | let one_of xs = List.nth xs (Random.int (List.length xs)) | |
980 | let take_one xs = | |
981 | if empty xs then failwith "Take_one: empty list" | |
982 | else | |
983 | let i = Random.int (List.length xs) in | |
984 | List.nth xs i, filter_index (fun j _ -> i <> j) xs | |
985 | *) | |
986 | ||
987 | (*****************************************************************************) | |
988 | (* Persistence *) | |
989 | (*****************************************************************************) | |
990 | ||
991 | let get_value filename = | |
992 | let chan = open_in filename in | |
993 | let x = input_value chan in (* <=> Marshal.from_channel *) | |
994 | (close_in chan; x) | |
995 | ||
996 | let write_value valu filename = | |
997 | let chan = open_out filename in | |
998 | (output_value chan valu; (* <=> Marshal.to_channel *) | |
999 | (* Marshal.to_channel chan valu [Marshal.Closures]; *) | |
1000 | close_out chan) | |
1001 | ||
1002 | let write_back func filename = | |
1003 | write_value (func (get_value filename)) filename | |
1004 | ||
1005 | ||
485bce71 C |
1006 | let read_value f = get_value f |
1007 | ||
34e49164 | 1008 | |
0708f913 C |
1009 | let marshal__to_string2 v flags = |
1010 | Marshal.to_string v flags | |
1011 | let marshal__to_string a b = | |
1012 | profile_code "Marshalling" (fun () -> marshal__to_string2 a b) | |
1013 | ||
1014 | let marshal__from_string2 v flags = | |
1015 | Marshal.from_string v flags | |
1016 | let marshal__from_string a b = | |
1017 | profile_code "Marshalling" (fun () -> marshal__from_string2 a b) | |
1018 | ||
1019 | ||
1020 | ||
34e49164 C |
1021 | (*****************************************************************************) |
1022 | (* Counter *) | |
1023 | (*****************************************************************************) | |
1024 | let _counter = ref 0 | |
1025 | let counter () = (_counter := !_counter +1; !_counter) | |
1026 | ||
1027 | let _counter2 = ref 0 | |
1028 | let counter2 () = (_counter2 := !_counter2 +1; !_counter2) | |
1029 | ||
1030 | let _counter3 = ref 0 | |
1031 | let counter3 () = (_counter3 := !_counter3 +1; !_counter3) | |
1032 | ||
1033 | type timestamp = int | |
1034 | ||
1035 | (*****************************************************************************) | |
1036 | (* String_of *) | |
1037 | (*****************************************************************************) | |
1038 | (* To work with the macro system autogenerated string_of and print_ function | |
1039 | (kind of deriving a la haskell) *) | |
1040 | ||
1041 | (* int, bool, char, float, ref ?, string *) | |
1042 | ||
1043 | let string_of_string s = "\"" ^ s "\"" | |
1044 | ||
1045 | let string_of_list f xs = | |
1046 | "[" ^ (xs +> List.map f +> String.concat ";" ) ^ "]" | |
1047 | ||
1048 | let string_of_unit () = "()" | |
1049 | ||
1050 | let string_of_array f xs = | |
1051 | "[|" ^ (xs +> Array.to_list +> List.map f +> String.concat ";") ^ "|]" | |
1052 | ||
1053 | let string_of_option f = function | |
1054 | | None -> "None " | |
1055 | | Some x -> "Some " ^ (f x) | |
1056 | ||
1057 | ||
1058 | ||
1059 | ||
1060 | let print_bool x = print_string (if x then "True" else "False") | |
1061 | ||
1062 | let print_option pr = function | |
1063 | | None -> print_string "None" | |
1064 | | Some x -> print_string "Some ("; pr x; print_string ")" | |
1065 | ||
1066 | let print_list pr xs = | |
1067 | begin | |
1068 | print_string "["; | |
1069 | List.iter (fun x -> pr x; print_string ",") xs; | |
1070 | print_string "]"; | |
1071 | end | |
1072 | ||
1073 | (* specialised | |
1074 | let (string_of_list: char list -> string) = | |
1075 | List.fold_left (fun acc x -> acc^(Char.escaped x)) "" | |
1076 | *) | |
1077 | ||
1078 | ||
1079 | let rec print_between between fn = function | |
1080 | | [] -> () | |
1081 | | [x] -> fn x | |
1082 | | x::xs -> fn x; between(); print_between between fn xs | |
1083 | ||
1084 | ||
1085 | ||
1086 | ||
1087 | let adjust_pp_with_indent f = | |
1088 | Format.open_box !_tab_level_print; | |
1089 | (*Format.force_newline();*) | |
1090 | f(); | |
1091 | Format.close_box (); | |
1092 | Format.print_newline() | |
1093 | ||
1094 | let adjust_pp_with_indent_and_header s f = | |
1095 | Format.open_box (!_tab_level_print + String.length s); | |
1096 | do_n !_tab_level_print (fun () -> Format.print_string " "); | |
1097 | Format.print_string s; | |
1098 | f(); | |
1099 | Format.close_box (); | |
1100 | Format.print_newline() | |
1101 | ||
1102 | ||
1103 | ||
1104 | let pp_do_in_box f = Format.open_box 1; f(); Format.close_box () | |
1105 | let pp_do_in_zero_box f = Format.open_box 0; f(); Format.close_box () | |
1106 | ||
1107 | let pp_f_in_box f = | |
1108 | Format.open_box 1; | |
1109 | let res = f() in | |
1110 | Format.close_box (); | |
1111 | res | |
1112 | ||
1113 | let pp s = Format.print_string s | |
1114 | ||
0708f913 C |
1115 | let mk_str_func_of_assoc_conv xs = |
1116 | let swap (x,y) = (y,x) in | |
1117 | ||
1118 | (fun s -> | |
1119 | let xs' = List.map swap xs in | |
1120 | List.assoc s xs' | |
1121 | ), | |
1122 | (fun a -> | |
1123 | List.assoc a xs | |
1124 | ) | |
1125 | ||
708f4980 C |
1126 | |
1127 | ||
1128 | (* julia: convert something printed using format to print into a string *) | |
1129 | (* now at bottom of file | |
1130 | let format_to_string f = | |
1131 | ... | |
1132 | *) | |
1133 | ||
1134 | ||
1135 | ||
34e49164 C |
1136 | (*****************************************************************************) |
1137 | (* Macro *) | |
1138 | (*****************************************************************************) | |
1139 | ||
1140 | (* put your macro in macro.ml4, and you can test it interactivly as in lisp *) | |
1141 | let macro_expand s = | |
1142 | let c = open_out "/tmp/ttttt.ml" in | |
1143 | begin | |
1144 | output_string c s; close_out c; | |
1145 | command2 ("ocamlc -c -pp 'camlp4o pa_extend.cmo q_MLast.cmo -impl' " ^ | |
1146 | "-I +camlp4 -impl macro.ml4"); | |
1147 | command2 "camlp4o ./macro.cmo pr_o.cmo /tmp/ttttt.ml"; | |
1148 | command2 "rm -f /tmp/ttttt.ml"; | |
1149 | end | |
1150 | ||
1151 | (* | |
1152 | let t = macro_expand "{ x + y | (x,y) <- [(1,1);(2,2);(3,3)] and x>2 and y<3}" | |
1153 | let x = { x + y | (x,y) <- [(1,1);(2,2);(3,3)] and x > 2 and y < 3} | |
1154 | let t = macro_expand "{1 .. 10}" | |
1155 | let x = {1 .. 10} +> List.map (fun i -> i) | |
1156 | let t = macro_expand "[1;2] to append to [2;4]" | |
1157 | let t = macro_expand "{x = 2; x = 3}" | |
1158 | ||
1159 | let t = macro_expand "type 'a bintree = Leaf of 'a | Branch of ('a bintree * 'a bintree)" | |
1160 | *) | |
1161 | ||
1162 | ||
1163 | ||
1164 | (*****************************************************************************) | |
1165 | (* Composition/Control *) | |
1166 | (*****************************************************************************) | |
1167 | ||
1168 | (* I like the obj.func object notation. In OCaml cant use '.' so I use +> | |
1169 | * | |
1170 | * update: it seems that F# agrees with me :) but they use |> | |
1171 | *) | |
1172 | ||
1173 | (* now in prelude: | |
1174 | * let (+>) o f = f o | |
1175 | *) | |
1176 | let (+!>) refo f = refo := f !refo | |
1177 | (* alternatives: | |
1178 | * let ((@): 'a -> ('a -> 'b) -> 'b) = fun a b -> b a | |
1179 | * let o f g x = f (g x) | |
1180 | *) | |
1181 | ||
1182 | let ($) f g x = g (f x) | |
1183 | let compose f g x = f (g x) | |
1184 |