summaryrefslogtreecommitdiff
path: root/lisp/emacs-lisp/cl-macs.el
blob: c75d3b9f9f0a8490aa18f6857678535935c3bbfc (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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
;;; cl-macs.el --- Common Lisp macros -*-byte-compile-dynamic: t;-*-

;; Copyright (C) 1993, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
;;   Free Software Foundation, Inc.

;; Author: Dave Gillespie <daveg@synaptics.com>
;; Version: 2.02
;; Keywords: extensions

;; This file is part of GNU Emacs.

;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 3, or (at your option)
;; any later version.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.

;;; Commentary:

;; These are extensions to Emacs Lisp that provide a degree of
;; Common Lisp compatibility, beyond what is already built-in
;; in Emacs Lisp.
;;
;; This package was written by Dave Gillespie; it is a complete
;; rewrite of Cesar Quiroz's original cl.el package of December 1986.
;;
;; Bug reports, comments, and suggestions are welcome!

;; This file contains the portions of the Common Lisp extensions
;; package which should be autoloaded, but need only be present
;; if the compiler or interpreter is used---this file is not
;; necessary for executing compiled code.

;; See cl.el for Change Log.


;;; Code:

(or (memq 'cl-19 features)
    (error "Tried to load `cl-macs' before `cl'!"))


(defmacro cl-pop2 (place)
  (list 'prog1 (list 'car (list 'cdr place))
	(list 'setq place (list 'cdr (list 'cdr place)))))
(put 'cl-pop2 'edebug-form-spec 'edebug-sexps)

(defvar cl-optimize-safety)
(defvar cl-optimize-speed)


;;; This kludge allows macros which use cl-transform-function-property
;;; to be called at compile-time.

(require
 (progn
   (or (fboundp 'cl-transform-function-property)
       (defalias 'cl-transform-function-property
	 (function (lambda (n p f)
		     (list 'put (list 'quote n) (list 'quote p)
			   (list 'function (cons 'lambda f)))))))
   (car (or features (setq features (list 'cl-kludge))))))


;;; Initialization.

(defvar cl-old-bc-file-form nil)

(defun cl-compile-time-init ()
  (run-hooks 'cl-hack-bytecomp-hook))


;;; Some predicates for analyzing Lisp forms.  These are used by various
;;; macro expanders to optimize the results in certain common cases.

(defconst cl-simple-funcs '(car cdr nth aref elt if and or + - 1+ 1- min max
			    car-safe cdr-safe progn prog1 prog2))
(defconst cl-safe-funcs '(* / % length memq list vector vectorp
			  < > <= >= = error))

;;; Check if no side effects, and executes quickly.
(defun cl-simple-expr-p (x &optional size)
  (or size (setq size 10))
  (if (and (consp x) (not (memq (car x) '(quote function function*))))
      (and (symbolp (car x))
	   (or (memq (car x) cl-simple-funcs)
	       (get (car x) 'side-effect-free))
	   (progn
	     (setq size (1- size))
	     (while (and (setq x (cdr x))
			 (setq size (cl-simple-expr-p (car x) size))))
	     (and (null x) (>= size 0) size)))
    (and (> size 0) (1- size))))

(defun cl-simple-exprs-p (xs)
  (while (and xs (cl-simple-expr-p (car xs)))
    (setq xs (cdr xs)))
  (not xs))

;;; Check if no side effects.
(defun cl-safe-expr-p (x)
  (or (not (and (consp x) (not (memq (car x) '(quote function function*)))))
      (and (symbolp (car x))
	   (or (memq (car x) cl-simple-funcs)
	       (memq (car x) cl-safe-funcs)
	       (get (car x) 'side-effect-free))
	   (progn
	     (while (and (setq x (cdr x)) (cl-safe-expr-p (car x))))
	     (null x)))))

;;; Check if constant (i.e., no side effects or dependencies).
(defun cl-const-expr-p (x)
  (cond ((consp x)
	 (or (eq (car x) 'quote)
	     (and (memq (car x) '(function function*))
		  (or (symbolp (nth 1 x))
		      (and (eq (car-safe (nth 1 x)) 'lambda) 'func)))))
	((symbolp x) (and (memq x '(nil t)) t))
	(t t)))

(defun cl-const-exprs-p (xs)
  (while (and xs (cl-const-expr-p (car xs)))
    (setq xs (cdr xs)))
  (not xs))

(defun cl-const-expr-val (x)
  (and (eq (cl-const-expr-p x) t) (if (consp x) (nth 1 x) x)))

(defun cl-expr-access-order (x v)
  (if (cl-const-expr-p x) v
    (if (consp x)
	(progn
	  (while (setq x (cdr x)) (setq v (cl-expr-access-order (car x) v)))
	  v)
      (if (eq x (car v)) (cdr v) '(t)))))

;;; Count number of times X refers to Y.  Return nil for 0 times.
(defun cl-expr-contains (x y)
  (cond ((equal y x) 1)
	((and (consp x) (not (memq (car-safe x) '(quote function function*))))
	 (let ((sum 0))
	   (while x
	     (setq sum (+ sum (or (cl-expr-contains (pop x) y) 0))))
	   (and (> sum 0) sum)))
	(t nil)))

(defun cl-expr-contains-any (x y)
  (while (and y (not (cl-expr-contains x (car y)))) (pop y))
  y)

;;; Check whether X may depend on any of the symbols in Y.
(defun cl-expr-depends-p (x y)
  (and (not (cl-const-expr-p x))
       (or (not (cl-safe-expr-p x)) (cl-expr-contains-any x y))))

;;; Symbols.

(defvar *gensym-counter*)
(defun gensym (&optional prefix)
  "Generate a new uninterned symbol.
The name is made by appending a number to PREFIX, default \"G\"."
  (let ((pfix (if (stringp prefix) prefix "G"))
	(num (if (integerp prefix) prefix
	       (prog1 *gensym-counter*
		 (setq *gensym-counter* (1+ *gensym-counter*))))))
    (make-symbol (format "%s%d" pfix num))))

(defun gentemp (&optional prefix)
  "Generate a new interned symbol with a unique name.
The name is made by appending a number to PREFIX, default \"G\"."
  (let ((pfix (if (stringp prefix) prefix "G"))
	name)
    (while (intern-soft (setq name (format "%s%d" pfix *gensym-counter*)))
      (setq *gensym-counter* (1+ *gensym-counter*)))
    (intern name)))


;;; Program structure.

(defmacro defun* (name args &rest body)
  "Define NAME as a function.
Like normal `defun', except ARGLIST allows full Common Lisp conventions,
and BODY is implicitly surrounded by (block NAME ...).

\(fn NAME ARGLIST [DOCSTRING] BODY...)"
  (let* ((res (cl-transform-lambda (cons args body) name))
	 (form (list* 'defun name (cdr res))))
    (if (car res) (list 'progn (car res) form) form)))

(defmacro defmacro* (name args &rest body)
  "Define NAME as a macro.
Like normal `defmacro', except ARGLIST allows full Common Lisp conventions,
and BODY is implicitly surrounded by (block NAME ...).

\(fn NAME ARGLIST [DOCSTRING] BODY...)"
  (let* ((res (cl-transform-lambda (cons args body) name))
	 (form (list* 'defmacro name (cdr res))))
    (if (car res) (list 'progn (car res) form) form)))

(defmacro function* (func)
  "Introduce a function.
Like normal `function', except that if argument is a lambda form,
its argument list allows full Common Lisp conventions."
  (if (eq (car-safe func) 'lambda)
      (let* ((res (cl-transform-lambda (cdr func) 'cl-none))
	     (form (list 'function (cons 'lambda (cdr res)))))
	(if (car res) (list 'progn (car res) form) form))
    (list 'function func)))

(defun cl-transform-function-property (func prop form)
  (let ((res (cl-transform-lambda form func)))
    (append '(progn) (cdr (cdr (car res)))
	    (list (list 'put (list 'quote func) (list 'quote prop)
			(list 'function (cons 'lambda (cdr res))))))))

(defconst lambda-list-keywords
  '(&optional &rest &key &allow-other-keys &aux &whole &body &environment))

(defvar cl-macro-environment nil)
(defvar bind-block) (defvar bind-defs) (defvar bind-enquote)
(defvar bind-inits) (defvar bind-lets) (defvar bind-forms)

(defun cl-transform-lambda (form bind-block)
  (let* ((args (car form)) (body (cdr form)) (orig-args args)
	 (bind-defs nil) (bind-enquote nil)
	 (bind-inits nil) (bind-lets nil) (bind-forms nil)
	 (header nil) (simple-args nil))
    (while (or (stringp (car body))
	       (memq (car-safe (car body)) '(interactive declare)))
      (push (pop body) header))
    (setq args (if (listp args) (copy-list args) (list '&rest args)))
    (let ((p (last args))) (if (cdr p) (setcdr p (list '&rest (cdr p)))))
    (if (setq bind-defs (cadr (memq '&cl-defs args)))
	(setq args (delq '&cl-defs (delq bind-defs args))
	      bind-defs (cadr bind-defs)))
    (if (setq bind-enquote (memq '&cl-quote args))
	(setq args (delq '&cl-quote args)))
    (if (memq '&whole args) (error "&whole not currently implemented"))
    (let* ((p (memq '&environment args)) (v (cadr p)))
      (if p (setq args (nconc (delq (car p) (delq v args))
			      (list '&aux (list v 'cl-macro-environment))))))
    (while (and args (symbolp (car args))
		(not (memq (car args) '(nil &rest &body &key &aux)))
		(not (and (eq (car args) '&optional)
			  (or bind-defs (consp (cadr args))))))
      (push (pop args) simple-args))
    (or (eq bind-block 'cl-none)
	(setq body (list (list* 'block bind-block body))))
    (if (null args)
	(list* nil (nreverse simple-args) (nconc (nreverse header) body))
      (if (memq '&optional simple-args) (push '&optional args))
      (cl-do-arglist args nil (- (length simple-args)
				 (if (memq '&optional simple-args) 1 0)))
      (setq bind-lets (nreverse bind-lets))
      (list* (and bind-inits (list* 'eval-when '(compile load eval)
				    (nreverse bind-inits)))
	     (nconc (nreverse simple-args)
		    (list '&rest (car (pop bind-lets))))
	     (nconc (let ((hdr (nreverse header)))
                      ;; Macro expansion can take place in the middle of
                      ;; apparently harmless computation, so it should not
                      ;; touch the match-data.
                      (save-match-data
                        (require 'help-fns)
                        (cons (help-add-fundoc-usage
                               (if (stringp (car hdr)) (pop hdr))
                               ;; orig-args can contain &cl-defs (an internal
                               ;; CL thingy I don't understand), so remove it.
                               (let ((x (memq '&cl-defs orig-args)))
                                 (if (null x) orig-args
                                   (delq (car x) (remq (cadr x) orig-args)))))
                              hdr)))
		    (list (nconc (list 'let* bind-lets)
				 (nreverse bind-forms) body)))))))

(defun cl-do-arglist (args expr &optional num)   ; uses bind-*
  (if (nlistp args)
      (if (or (memq args lambda-list-keywords) (not (symbolp args)))
	  (error "Invalid argument name: %s" args)
	(push (list args expr) bind-lets))
    (setq args (copy-list args))
    (let ((p (last args))) (if (cdr p) (setcdr p (list '&rest (cdr p)))))
    (let ((p (memq '&body args))) (if p (setcar p '&rest)))
    (if (memq '&environment args) (error "&environment used incorrectly"))
    (let ((save-args args)
	  (restarg (memq '&rest args))
	  (safety (if (cl-compiling-file) cl-optimize-safety 3))
	  (keys nil)
	  (laterarg nil) (exactarg nil) minarg)
      (or num (setq num 0))
      (if (listp (cadr restarg))
	  (setq restarg (make-symbol "--cl-rest--"))
	(setq restarg (cadr restarg)))
      (push (list restarg expr) bind-lets)
      (if (eq (car args) '&whole)
	  (push (list (cl-pop2 args) restarg) bind-lets))
      (let ((p args))
	(setq minarg restarg)
	(while (and p (not (memq (car p) lambda-list-keywords)))
	  (or (eq p args) (setq minarg (list 'cdr minarg)))
	  (setq p (cdr p)))
	(if (memq (car p) '(nil &aux))
	    (setq minarg (list '= (list 'length restarg)
			       (length (ldiff args p)))
		  exactarg (not (eq args p)))))
      (while (and args (not (memq (car args) lambda-list-keywords)))
	(let ((poparg (list (if (or (cdr args) (not exactarg)) 'pop 'car)
			    restarg)))
	  (cl-do-arglist
	   (pop args)
	   (if (or laterarg (= safety 0)) poparg
	     (list 'if minarg poparg
		   (list 'signal '(quote wrong-number-of-arguments)
			 (list 'list (and (not (eq bind-block 'cl-none))
					  (list 'quote bind-block))
			       (list 'length restarg)))))))
	(setq num (1+ num) laterarg t))
      (while (and (eq (car args) '&optional) (pop args))
	(while (and args (not (memq (car args) lambda-list-keywords)))
	  (let ((arg (pop args)))
	    (or (consp arg) (setq arg (list arg)))
	    (if (cddr arg) (cl-do-arglist (nth 2 arg) (list 'and restarg t)))
	    (let ((def (if (cdr arg) (nth 1 arg)
			 (or (car bind-defs)
			     (nth 1 (assq (car arg) bind-defs)))))
		  (poparg (list 'pop restarg)))
	      (and def bind-enquote (setq def (list 'quote def)))
	      (cl-do-arglist (car arg)
			     (if def (list 'if restarg poparg def) poparg))
	      (setq num (1+ num))))))
      (if (eq (car args) '&rest)
	  (let ((arg (cl-pop2 args)))
	    (if (consp arg) (cl-do-arglist arg restarg)))
	(or (eq (car args) '&key) (= safety 0) exactarg
	    (push (list 'if restarg
			   (list 'signal '(quote wrong-number-of-arguments)
				 (list 'list
				       (and (not (eq bind-block 'cl-none))
					    (list 'quote bind-block))
				       (list '+ num (list 'length restarg)))))
		     bind-forms)))
      (while (and (eq (car args) '&key) (pop args))
	(while (and args (not (memq (car args) lambda-list-keywords)))
	  (let ((arg (pop args)))
	    (or (consp arg) (setq arg (list arg)))
	    (let* ((karg (if (consp (car arg)) (caar arg)
			   (intern (format ":%s" (car arg)))))
		   (varg (if (consp (car arg)) (cadar arg) (car arg)))
		   (def (if (cdr arg) (cadr arg)
			  (or (car bind-defs) (cadr (assq varg bind-defs)))))
		   (look (list 'memq (list 'quote karg) restarg)))
	      (and def bind-enquote (setq def (list 'quote def)))
	      (if (cddr arg)
		  (let* ((temp (or (nth 2 arg) (make-symbol "--cl-var--")))
			 (val (list 'car (list 'cdr temp))))
		    (cl-do-arglist temp look)
		    (cl-do-arglist varg
				   (list 'if temp
					 (list 'prog1 val (list 'setq temp t))
					 def)))
		(cl-do-arglist
		 varg
		 (list 'car
		       (list 'cdr
			     (if (null def)
				 look
			       (list 'or look
				     (if (eq (cl-const-expr-p def) t)
					 (list
					  'quote
					  (list nil (cl-const-expr-val def)))
				       (list 'list nil def))))))))
	      (push karg keys)))))
      (setq keys (nreverse keys))
      (or (and (eq (car args) '&allow-other-keys) (pop args))
	  (null keys) (= safety 0)
	  (let* ((var (make-symbol "--cl-keys--"))
		 (allow '(:allow-other-keys))
		 (check (list
			 'while var
			 (list
			  'cond
			  (list (list 'memq (list 'car var)
				      (list 'quote (append keys allow)))
				(list 'setq var (list 'cdr (list 'cdr var))))
			  (list (list 'car
				      (list 'cdr
					    (list 'memq (cons 'quote allow)
						  restarg)))
				(list 'setq var nil))
			  (list t
				(list
				 'error
				 (format "Keyword argument %%s not one of %s"
					 keys)
				 (list 'car var)))))))
	    (push (list 'let (list (list var restarg)) check) bind-forms)))
      (while (and (eq (car args) '&aux) (pop args))
	(while (and args (not (memq (car args) lambda-list-keywords)))
	  (if (consp (car args))
	      (if (and bind-enquote (cadar args))
		  (cl-do-arglist (caar args)
				 (list 'quote (cadr (pop args))))
		(cl-do-arglist (caar args) (cadr (pop args))))
	    (cl-do-arglist (pop args) nil))))
      (if args (error "Malformed argument list %s" save-args)))))

(defun cl-arglist-args (args)
  (if (nlistp args) (list args)
    (let ((res nil) (kind nil) arg)
      (while (consp args)
	(setq arg (pop args))
	(if (memq arg lambda-list-keywords) (setq kind arg)
	  (if (eq arg '&cl-defs) (pop args)
	    (and (consp arg) kind (setq arg (car arg)))
	    (and (consp arg) (cdr arg) (eq kind '&key) (setq arg (cadr arg)))
	    (setq res (nconc res (cl-arglist-args arg))))))
      (nconc res (and args (list args))))))

(defmacro destructuring-bind (args expr &rest body)
  (let* ((bind-lets nil) (bind-forms nil) (bind-inits nil)
	 (bind-defs nil) (bind-block 'cl-none))
    (cl-do-arglist (or args '(&aux)) expr)
    (append '(progn) bind-inits
	    (list (nconc (list 'let* (nreverse bind-lets))
			 (nreverse bind-forms) body)))))


;;; The `eval-when' form.

(defvar cl-not-toplevel nil)

(defmacro eval-when (when &rest body)
  "Control when BODY is evaluated.
If `compile' is in WHEN, BODY is evaluated when compiled at top-level.
If `load' is in WHEN, BODY is evaluated when loaded after top-level compile.
If `eval' is in WHEN, BODY is evaluated when interpreted or at non-top-level.

\(fn (WHEN...) BODY...)"
  (if (and (fboundp 'cl-compiling-file) (cl-compiling-file)
	   (not cl-not-toplevel) (not (boundp 'for-effect)))  ; horrible kludge
      (let ((comp (or (memq 'compile when) (memq :compile-toplevel when)))
	    (cl-not-toplevel t))
	(if (or (memq 'load when) (memq :load-toplevel when))
	    (if comp (cons 'progn (mapcar 'cl-compile-time-too body))
	      (list* 'if nil nil body))
	  (progn (if comp (eval (cons 'progn body))) nil)))
    (and (or (memq 'eval when) (memq :execute when))
	 (cons 'progn body))))

(defun cl-compile-time-too (form)
  (or (and (symbolp (car-safe form)) (get (car-safe form) 'byte-hunk-handler))
      (setq form (macroexpand
		  form (cons '(eval-when) byte-compile-macro-environment))))
  (cond ((eq (car-safe form) 'progn)
	 (cons 'progn (mapcar 'cl-compile-time-too (cdr form))))
	((eq (car-safe form) 'eval-when)
	 (let ((when (nth 1 form)))
	   (if (or (memq 'eval when) (memq :execute when))
	       (list* 'eval-when (cons 'compile when) (cddr form))
	     form)))
	(t (eval form) form)))

(defmacro load-time-value (form &optional read-only)
  "Like `progn', but evaluates the body at load time.
The result of the body appears to the compiler as a quoted constant."
  (if (cl-compiling-file)
      (let* ((temp (gentemp "--cl-load-time--"))
	     (set (list 'set (list 'quote temp) form)))
	(if (and (fboundp 'byte-compile-file-form-defmumble)
		 (boundp 'this-kind) (boundp 'that-one))
	    (fset 'byte-compile-file-form
		  (list 'lambda '(form)
			(list 'fset '(quote byte-compile-file-form)
			      (list 'quote
				    (symbol-function 'byte-compile-file-form)))
			(list 'byte-compile-file-form (list 'quote set))
			'(byte-compile-file-form form)))
	  (print set (symbol-value 'outbuffer)))
	(list 'symbol-value (list 'quote temp)))
    (list 'quote (eval form))))


;;; Conditional control structures.

(defmacro case (expr &rest clauses)
  "Eval EXPR and choose among clauses on that value.
Each clause looks like (KEYLIST BODY...).  EXPR is evaluated and compared
against each key in each KEYLIST; the corresponding BODY is evaluated.
If no clause succeeds, case returns nil.  A single atom may be used in
place of a KEYLIST of one atom.  A KEYLIST of t or `otherwise' is
allowed only in the final clause, and matches if no other keys match.
Key values are compared by `eql'.
\n(fn EXPR (KEYLIST BODY...)...)"
  (let* ((temp (if (cl-simple-expr-p expr 3) expr (make-symbol "--cl-var--")))
	 (head-list nil)
	 (body (cons
		'cond
		(mapcar
		 (function
		  (lambda (c)
		    (cons (cond ((memq (car c) '(t otherwise)) t)
				((eq (car c) 'ecase-error-flag)
				 (list 'error "ecase failed: %s, %s"
				       temp (list 'quote (reverse head-list))))
				((listp (car c))
				 (setq head-list (append (car c) head-list))
				 (list 'member* temp (list 'quote (car c))))
				(t
				 (if (memq (car c) head-list)
				     (error "Duplicate key in case: %s"
					    (car c)))
				 (push (car c) head-list)
				 (list 'eql temp (list 'quote (car c)))))
			  (or (cdr c) '(nil)))))
		 clauses))))
    (if (eq temp expr) body
      (list 'let (list (list temp expr)) body))))

(defmacro ecase (expr &rest clauses)
  "Like `case', but error if no case fits.
`otherwise'-clauses are not allowed.
\n(fn EXPR (KEYLIST BODY...)...)"
  (list* 'case expr (append clauses '((ecase-error-flag)))))

(defmacro typecase (expr &rest clauses)
  "Evals EXPR, chooses among clauses on that value.
Each clause looks like (TYPE BODY...).  EXPR is evaluated and, if it
satisfies TYPE, the corresponding BODY is evaluated.  If no clause succeeds,
typecase returns nil.  A TYPE of t or `otherwise' is allowed only in the
final clause, and matches if no other keys match.
\n(fn EXPR (TYPE BODY...)...)"
  (let* ((temp (if (cl-simple-expr-p expr 3) expr (make-symbol "--cl-var--")))
	 (type-list nil)
	 (body (cons
		'cond
		(mapcar
		 (function
		  (lambda (c)
		    (cons (cond ((eq (car c) 'otherwise) t)
				((eq (car c) 'ecase-error-flag)
				 (list 'error "etypecase failed: %s, %s"
				       temp (list 'quote (reverse type-list))))
				(t
				 (push (car c) type-list)
				 (cl-make-type-test temp (car c))))
			  (or (cdr c) '(nil)))))
		 clauses))))
    (if (eq temp expr) body
      (list 'let (list (list temp expr)) body))))

(defmacro etypecase (expr &rest clauses)
  "Like `typecase', but error if no case fits.
`otherwise'-clauses are not allowed.
\n(fn EXPR (TYPE BODY...)...)"
  (list* 'typecase expr (append clauses '((ecase-error-flag)))))


;;; Blocks and exits.

(defmacro block (name &rest body)
  "Define a lexically-scoped block named NAME.
NAME may be any symbol.  Code inside the BODY forms can call `return-from'
to jump prematurely out of the block.  This differs from `catch' and `throw'
in two respects:  First, the NAME is an unevaluated symbol rather than a
quoted symbol or other form; and second, NAME is lexically rather than
dynamically scoped:  Only references to it within BODY will work.  These
references may appear inside macro expansions, but not inside functions
called from BODY."
  (if (cl-safe-expr-p (cons 'progn body)) (cons 'progn body)
    (list 'cl-block-wrapper
	  (list* 'catch (list 'quote (intern (format "--cl-block-%s--" name)))
		 body))))

(defvar cl-active-block-names nil)

(put 'cl-block-wrapper 'byte-compile 'cl-byte-compile-block)
(defun cl-byte-compile-block (cl-form)
  (if (fboundp 'byte-compile-form-do-effect)  ; Check for optimizing compiler
      (progn
	(let* ((cl-entry (cons (nth 1 (nth 1 (nth 1 cl-form))) nil))
	       (cl-active-block-names (cons cl-entry cl-active-block-names))
	       (cl-body (byte-compile-top-level
			 (cons 'progn (cddr (nth 1 cl-form))))))
	  (if (cdr cl-entry)
	      (byte-compile-form (list 'catch (nth 1 (nth 1 cl-form)) cl-body))
	    (byte-compile-form cl-body))))
    (byte-compile-form (nth 1 cl-form))))

(put 'cl-block-throw 'byte-compile 'cl-byte-compile-throw)
(defun cl-byte-compile-throw (cl-form)
  (let ((cl-found (assq (nth 1 (nth 1 cl-form)) cl-active-block-names)))
    (if cl-found (setcdr cl-found t)))
  (byte-compile-normal-call (cons 'throw (cdr cl-form))))

(defmacro return (&optional result)
  "Return from the block named nil.
This is equivalent to `(return-from nil RESULT)'."
  (list 'return-from nil result))

(defmacro return-from (name &optional result)
  "Return from the block named NAME.
This jump out to the innermost enclosing `(block NAME ...)' form,
returning RESULT from that form (or nil if RESULT is omitted).
This is compatible with Common Lisp, but note that `defun' and
`defmacro' do not create implicit blocks as they do in Common Lisp."
  (let ((name2 (intern (format "--cl-block-%s--" name))))
    (list 'cl-block-throw (list 'quote name2) result)))


;;; The "loop" macro.

(defvar args) (defvar loop-accum-var) (defvar loop-accum-vars)
(defvar loop-bindings) (defvar loop-body) (defvar loop-destr-temps)
(defvar loop-finally) (defvar loop-finish-flag) (defvar loop-first-flag)
(defvar loop-initially) (defvar loop-map-form) (defvar loop-name)
(defvar loop-result) (defvar loop-result-explicit)
(defvar loop-result-var) (defvar loop-steps) (defvar loop-symbol-macs)

(defmacro loop (&rest args)
  "The Common Lisp `loop' macro.
Valid clauses are:
  for VAR from/upfrom/downfrom NUM to/upto/downto/above/below NUM by NUM,
  for VAR in LIST by FUNC, for VAR on LIST by FUNC, for VAR = INIT then EXPR,
  for VAR across ARRAY, repeat NUM, with VAR = INIT, while COND, until COND,
  always COND, never COND, thereis COND, collect EXPR into VAR,
  append EXPR into VAR, nconc EXPR into VAR, sum EXPR into VAR,
  count EXPR into VAR, maximize EXPR into VAR, minimize EXPR into VAR,
  if COND CLAUSE [and CLAUSE]... else CLAUSE [and CLAUSE...],
  unless COND CLAUSE [and CLAUSE]... else CLAUSE [and CLAUSE...],
  do EXPRS..., initially EXPRS..., finally EXPRS..., return EXPR,
  finally return EXPR, named NAME.

\(fn CLAUSE...)"
  (if (not (memq t (mapcar 'symbolp (delq nil (delq t (copy-list args))))))
      (list 'block nil (list* 'while t args))
    (let ((loop-name nil)	(loop-bindings nil)
	  (loop-body nil)	(loop-steps nil)
	  (loop-result nil)	(loop-result-explicit nil)
	  (loop-result-var nil) (loop-finish-flag nil)
	  (loop-accum-var nil)	(loop-accum-vars nil)
	  (loop-initially nil)	(loop-finally nil)
	  (loop-map-form nil)   (loop-first-flag nil)
	  (loop-destr-temps nil) (loop-symbol-macs nil))
      (setq args (append args '(cl-end-loop)))
      (while (not (eq (car args) 'cl-end-loop)) (cl-parse-loop-clause))
      (if loop-finish-flag
	  (push `((,loop-finish-flag t)) loop-bindings))
      (if loop-first-flag
	  (progn (push `((,loop-first-flag t)) loop-bindings)
		 (push `(setq ,loop-first-flag nil) loop-steps)))
      (let* ((epilogue (nconc (nreverse loop-finally)
			      (list (or loop-result-explicit loop-result))))
	     (ands (cl-loop-build-ands (nreverse loop-body)))
	     (while-body (nconc (cadr ands) (nreverse loop-steps)))
	     (body (append
		    (nreverse loop-initially)
		    (list (if loop-map-form
			      (list 'block '--cl-finish--
				    (subst
				     (if (eq (car ands) t) while-body
				       (cons `(or ,(car ands)
						  (return-from --cl-finish--
						    nil))
					     while-body))
				     '--cl-map loop-map-form))
			    (list* 'while (car ands) while-body)))
		    (if loop-finish-flag
			(if (equal epilogue '(nil)) (list loop-result-var)
			  `((if ,loop-finish-flag
				(progn ,@epilogue) ,loop-result-var)))
		      epilogue))))
	(if loop-result-var (push (list loop-result-var) loop-bindings))
	(while loop-bindings
	  (if (cdar loop-bindings)
	      (setq body (list (cl-loop-let (pop loop-bindings) body t)))
	    (let ((lets nil))
	      (while (and loop-bindings
			  (not (cdar loop-bindings)))
		(push (car (pop loop-bindings)) lets))
	      (setq body (list (cl-loop-let lets body nil))))))
	(if loop-symbol-macs
	    (setq body (list (list* 'symbol-macrolet loop-symbol-macs body))))
	(list* 'block loop-name body)))))

(defun cl-parse-loop-clause ()		; uses args, loop-*
  (let ((word (pop args))
	(hash-types '(hash-key hash-keys hash-value hash-values))
	(key-types '(key-code key-codes key-seq key-seqs
		     key-binding key-bindings)))
    (cond

     ((null args)
      (error "Malformed `loop' macro"))

     ((eq word 'named)
      (setq loop-name (pop args)))

     ((eq word 'initially)
      (if (memq (car args) '(do doing)) (pop args))
      (or (consp (car args)) (error "Syntax error on `initially' clause"))
      (while (consp (car args))
	(push (pop args) loop-initially)))

     ((eq word 'finally)
      (if (eq (car args) 'return)
	  (setq loop-result-explicit (or (cl-pop2 args) '(quote nil)))
	(if (memq (car args) '(do doing)) (pop args))
	(or (consp (car args)) (error "Syntax error on `finally' clause"))
	(if (and (eq (caar args) 'return) (null loop-name))
	    (setq loop-result-explicit (or (nth 1 (pop args)) '(quote nil)))
	  (while (consp (car args))
	    (push (pop args) loop-finally)))))

     ((memq word '(for as))
      (let ((loop-for-bindings nil) (loop-for-sets nil) (loop-for-steps nil)
	    (ands nil))
	(while
	    ;; Use `gensym' rather than `make-symbol'.  It's important that
	    ;; (not (eq (symbol-name var1) (symbol-name var2))) because
	    ;; these vars get added to the cl-macro-environment.
	    (let ((var (or (pop args) (gensym "--cl-var--"))))
	      (setq word (pop args))
	      (if (eq word 'being) (setq word (pop args)))
	      (if (memq word '(the each)) (setq word (pop args)))
	      (if (memq word '(buffer buffers))
		  (setq word 'in args (cons '(buffer-list) args)))
	      (cond

	       ((memq word '(from downfrom upfrom to downto upto
			     above below by))
		(push word args)
		(if (memq (car args) '(downto above))
		    (error "Must specify `from' value for downward loop"))
		(let* ((down (or (eq (car args) 'downfrom)
				 (memq (caddr args) '(downto above))))
		       (excl (or (memq (car args) '(above below))
				 (memq (caddr args) '(above below))))
		       (start (and (memq (car args) '(from upfrom downfrom))
				   (cl-pop2 args)))
		       (end (and (memq (car args)
				       '(to upto downto above below))
				 (cl-pop2 args)))
		       (step (and (eq (car args) 'by) (cl-pop2 args)))
		       (end-var (and (not (cl-const-expr-p end))
				     (make-symbol "--cl-var--")))
		       (step-var (and (not (cl-const-expr-p step))
				      (make-symbol "--cl-var--"))))
		  (and step (numberp step) (<= step 0)
		       (error "Loop `by' value is not positive: %s" step))
		  (push (list var (or start 0)) loop-for-bindings)
		  (if end-var (push (list end-var end) loop-for-bindings))
		  (if step-var (push (list step-var step)
				     loop-for-bindings))
		  (if end
		      (push (list
			     (if down (if excl '> '>=) (if excl '< '<=))
			     var (or end-var end)) loop-body))
		  (push (list var (list (if down '- '+) var
					(or step-var step 1)))
			loop-for-steps)))

	       ((memq word '(in in-ref on))
		(let* ((on (eq word 'on))
		       (temp (if (and on (symbolp var))
				 var (make-symbol "--cl-var--"))))
		  (push (list temp (pop args)) loop-for-bindings)
		  (push (list 'consp temp) loop-body)
		  (if (eq word 'in-ref)
		      (push (list var (list 'car temp)) loop-symbol-macs)
		    (or (eq temp var)
			(progn
			  (push (list var nil) loop-for-bindings)
			  (push (list var (if on temp (list 'car temp)))
				loop-for-sets))))
		  (push (list temp
			      (if (eq (car args) 'by)
				  (let ((step (cl-pop2 args)))
				    (if (and (memq (car-safe step)
						   '(quote function
							   function*))
					     (symbolp (nth 1 step)))
					(list (nth 1 step) temp)
				      (list 'funcall step temp)))
				(list 'cdr temp)))
			loop-for-steps)))

	       ((eq word '=)
		(let* ((start (pop args))
		       (then (if (eq (car args) 'then) (cl-pop2 args) start)))
		  (push (list var nil) loop-for-bindings)
		  (if (or ands (eq (car args) 'and))
		      (progn
			(push `(,var
				(if ,(or loop-first-flag
					 (setq loop-first-flag
					       (make-symbol "--cl-var--")))
				    ,start ,var))
			      loop-for-sets)
			(push (list var then) loop-for-steps))
		    (push (list var
				(if (eq start then) start
				  `(if ,(or loop-first-flag
					    (setq loop-first-flag
						  (make-symbol "--cl-var--")))
				       ,start ,then)))
			  loop-for-sets))))

	       ((memq word '(across across-ref))
		(let ((temp-vec (make-symbol "--cl-vec--"))
		      (temp-idx (make-symbol "--cl-idx--")))
		  (push (list temp-vec (pop args)) loop-for-bindings)
		  (push (list temp-idx -1) loop-for-bindings)
		  (push (list '< (list 'setq temp-idx (list '1+ temp-idx))
			      (list 'length temp-vec)) loop-body)
		  (if (eq word 'across-ref)
		      (push (list var (list 'aref temp-vec temp-idx))
			    loop-symbol-macs)
		    (push (list var nil) loop-for-bindings)
		    (push (list var (list 'aref temp-vec temp-idx))
			  loop-for-sets))))

	       ((memq word '(element elements))
		(let ((ref (or (memq (car args) '(in-ref of-ref))
			       (and (not (memq (car args) '(in of)))
				    (error "Expected `of'"))))
		      (seq (cl-pop2 args))
		      (temp-seq (make-symbol "--cl-seq--"))
		      (temp-idx (if (eq (car args) 'using)
				    (if (and (= (length (cadr args)) 2)
					     (eq (caadr args) 'index))
					(cadr (cl-pop2 args))
				      (error "Bad `using' clause"))
				  (make-symbol "--cl-idx--"))))
		  (push (list temp-seq seq) loop-for-bindings)
		  (push (list temp-idx 0) loop-for-bindings)
		  (if ref
		      (let ((temp-len (make-symbol "--cl-len--")))
			(push (list temp-len (list 'length temp-seq))
			      loop-for-bindings)
			(push (list var (list 'elt temp-seq temp-idx))
			      loop-symbol-macs)
			(push (list '< temp-idx temp-len) loop-body))
		    (push (list var nil) loop-for-bindings)
		    (push (list 'and temp-seq
				(list 'or (list 'consp temp-seq)
				      (list '< temp-idx
					    (list 'length temp-seq))))
			  loop-body)
		    (push (list var (list 'if (list 'consp temp-seq)
					  (list 'pop temp-seq)
					  (list 'aref temp-seq temp-idx)))
			  loop-for-sets))
		  (push (list temp-idx (list '1+ temp-idx))
			loop-for-steps)))

	       ((memq word hash-types)
		(or (memq (car args) '(in of)) (error "Expected `of'"))
		(let* ((table (cl-pop2 args))
		       (other (if (eq (car args) 'using)
				  (if (and (= (length (cadr args)) 2)
					   (memq (caadr args) hash-types)
					   (not (eq (caadr args) word)))
				      (cadr (cl-pop2 args))
				    (error "Bad `using' clause"))
				(make-symbol "--cl-var--"))))
		  (if (memq word '(hash-value hash-values))
		      (setq var (prog1 other (setq other var))))
		  (setq loop-map-form
			`(maphash (lambda (,var ,other) . --cl-map) ,table))))

	       ((memq word '(symbol present-symbol external-symbol
			     symbols present-symbols external-symbols))
		(let ((ob (and (memq (car args) '(in of)) (cl-pop2 args))))
		  (setq loop-map-form
			`(mapatoms (lambda (,var) . --cl-map) ,ob))))

	       ((memq word '(overlay overlays extent extents))
		(let ((buf nil) (from nil) (to nil))
		  (while (memq (car args) '(in of from to))
		    (cond ((eq (car args) 'from) (setq from (cl-pop2 args)))
			  ((eq (car args) 'to) (setq to (cl-pop2 args)))
			  (t (setq buf (cl-pop2 args)))))
		  (setq loop-map-form
			`(cl-map-extents
			  (lambda (,var ,(make-symbol "--cl-var--"))
			    (progn . --cl-map) nil)
			  ,buf ,from ,to))))

	       ((memq word '(interval intervals))
		(let ((buf nil) (prop nil) (from nil) (to nil)
		      (var1 (make-symbol "--cl-var1--"))
		      (var2 (make-symbol "--cl-var2--")))
		  (while (memq (car args) '(in of property from to))
		    (cond ((eq (car args) 'from) (setq from (cl-pop2 args)))
			  ((eq (car args) 'to) (setq to (cl-pop2 args)))
			  ((eq (car args) 'property)
			   (setq prop (cl-pop2 args)))
			  (t (setq buf (cl-pop2 args)))))
		  (if (and (consp var) (symbolp (car var)) (symbolp (cdr var)))
		      (setq var1 (car var) var2 (cdr var))
		    (push (list var (list 'cons var1 var2)) loop-for-sets))
		  (setq loop-map-form
			`(cl-map-intervals
			  (lambda (,var1 ,var2) . --cl-map)
			  ,buf ,prop ,from ,to))))

	       ((memq word key-types)
		(or (memq (car args) '(in of)) (error "Expected `of'"))
		(let ((map (cl-pop2 args))
		      (other (if (eq (car args) 'using)
				 (if (and (= (length (cadr args)) 2)
					  (memq (caadr args) key-types)
					  (not (eq (caadr args) word)))
				     (cadr (cl-pop2 args))
				   (error "Bad `using' clause"))
			       (make-symbol "--cl-var--"))))
		  (if (memq word '(key-binding key-bindings))
		      (setq var (prog1 other (setq other var))))
		  (setq loop-map-form
			`(,(if (memq word '(key-seq key-seqs))
			       'cl-map-keymap-recursively 'map-keymap)
			  (lambda (,var ,other) . --cl-map) ,map))))

	       ((memq word '(frame frames screen screens))
		(let ((temp (make-symbol "--cl-var--")))
		  (push (list var  '(selected-frame))
			loop-for-bindings)
		  (push (list temp nil) loop-for-bindings)
		  (push (list 'prog1 (list 'not (list 'eq var temp))
			      (list 'or temp (list 'setq temp var)))
			loop-body)
		  (push (list var (list 'next-frame var))
			loop-for-steps)))

	       ((memq word '(window windows))
		(let ((scr (and (memq (car args) '(in of)) (cl-pop2 args)))
		      (temp (make-symbol "--cl-var--")))
		  (push (list var (if scr
				      (list 'frame-selected-window scr)
				    '(selected-window)))
			loop-for-bindings)
		  (push (list temp nil) loop-for-bindings)
		  (push (list 'prog1 (list 'not (list 'eq var temp))
			      (list 'or temp (list 'setq temp var)))
			loop-body)
		  (push (list var (list 'next-window var)) loop-for-steps)))

	       (t
		(let ((handler (and (symbolp word)
				    (get word 'cl-loop-for-handler))))
		  (if handler
		      (funcall handler var)
		    (error "Expected a `for' preposition, found %s" word)))))
	      (eq (car args) 'and))
	  (setq ands t)
	  (pop args))
	(if (and ands loop-for-bindings)
	    (push (nreverse loop-for-bindings) loop-bindings)
	  (setq loop-bindings (nconc (mapcar 'list loop-for-bindings)
				     loop-bindings)))
	(if loop-for-sets
	    (push (list 'progn
			(cl-loop-let (nreverse loop-for-sets) 'setq ands)
			t) loop-body))
	(if loop-for-steps
	    (push (cons (if ands 'psetq 'setq)
			(apply 'append (nreverse loop-for-steps)))
		  loop-steps))))

     ((eq word 'repeat)
      (let ((temp (make-symbol "--cl-var--")))
	(push (list (list temp (pop args))) loop-bindings)
	(push (list '>= (list 'setq temp (list '1- temp)) 0) loop-body)))

     ((memq word '(collect collecting))
      (let ((what (pop args))
	    (var (cl-loop-handle-accum nil 'nreverse)))
	(if (eq var loop-accum-var)
	    (push (list 'progn (list 'push what var) t) loop-body)
	  (push (list 'progn
		      (list 'setq var (list 'nconc var (list 'list what)))
		      t) loop-body))))

     ((memq word '(nconc nconcing append appending))
      (let ((what (pop args))
	    (var (cl-loop-handle-accum nil 'nreverse)))
	(push (list 'progn
		    (list 'setq var
			  (if (eq var loop-accum-var)
			      (list 'nconc
				    (list (if (memq word '(nconc nconcing))
					      'nreverse 'reverse)
					  what)
				    var)
			    (list (if (memq word '(nconc nconcing))
				      'nconc 'append)
				  var what))) t) loop-body)))

     ((memq word '(concat concating))
      (let ((what (pop args))
	    (var (cl-loop-handle-accum "")))
	(push (list 'progn (list 'callf 'concat var what) t) loop-body)))

     ((memq word '(vconcat vconcating))
      (let ((what (pop args))
	    (var (cl-loop-handle-accum [])))
	(push (list 'progn (list 'callf 'vconcat var what) t) loop-body)))

     ((memq word '(sum summing))
      (let ((what (pop args))
	    (var (cl-loop-handle-accum 0)))
	(push (list 'progn (list 'incf var what) t) loop-body)))

     ((memq word '(count counting))
      (let ((what (pop args))
	    (var (cl-loop-handle-accum 0)))
	(push (list 'progn (list 'if what (list 'incf var)) t) loop-body)))

     ((memq word '(minimize minimizing maximize maximizing))
      (let* ((what (pop args))
	     (temp (if (cl-simple-expr-p what) what (make-symbol "--cl-var--")))
	     (var (cl-loop-handle-accum nil))
	     (func (intern (substring (symbol-name word) 0 3)))
	     (set (list 'setq var (list 'if var (list func var temp) temp))))
	(push (list 'progn (if (eq temp what) set
			     (list 'let (list (list temp what)) set))
		    t) loop-body)))

     ((eq word 'with)
      (let ((bindings nil))
	(while (progn (push (list (pop args)
				  (and (eq (car args) '=) (cl-pop2 args)))
			    bindings)
		      (eq (car args) 'and))
	  (pop args))
	(push (nreverse bindings) loop-bindings)))

     ((eq word 'while)
      (push (pop args) loop-body))

     ((eq word 'until)
      (push (list 'not (pop args)) loop-body))

     ((eq word 'always)
      (or loop-finish-flag (setq loop-finish-flag (make-symbol "--cl-flag--")))
      (push (list 'setq loop-finish-flag (pop args)) loop-body)
      (setq loop-result t))

     ((eq word 'never)
      (or loop-finish-flag (setq loop-finish-flag (make-symbol "--cl-flag--")))
      (push (list 'setq loop-finish-flag (list 'not (pop args)))
	    loop-body)
      (setq loop-result t))

     ((eq word 'thereis)
      (or loop-finish-flag (setq loop-finish-flag (make-symbol "--cl-flag--")))
      (or loop-result-var (setq loop-result-var (make-symbol "--cl-var--")))
      (push (list 'setq loop-finish-flag
		  (list 'not (list 'setq loop-result-var (pop args))))
	    loop-body))

     ((memq word '(if when unless))
      (let* ((cond (pop args))
	     (then (let ((loop-body nil))
		     (cl-parse-loop-clause)
		     (cl-loop-build-ands (nreverse loop-body))))
	     (else (let ((loop-body nil))
		     (if (eq (car args) 'else)
			 (progn (pop args) (cl-parse-loop-clause)))
		     (cl-loop-build-ands (nreverse loop-body))))
	     (simple (and (eq (car then) t) (eq (car else) t))))
	(if (eq (car args) 'end) (pop args))
	(if (eq word 'unless) (setq then (prog1 else (setq else then))))
	(let ((form (cons (if simple (cons 'progn (nth 1 then)) (nth 2 then))
			  (if simple (nth 1 else) (list (nth 2 else))))))
	  (if (cl-expr-contains form 'it)
	      (let ((temp (make-symbol "--cl-var--")))
		(push (list temp) loop-bindings)
		(setq form (list* 'if (list 'setq temp cond)
				  (subst temp 'it form))))
	    (setq form (list* 'if cond form)))
	  (push (if simple (list 'progn form t) form) loop-body))))

     ((memq word '(do doing))
      (let ((body nil))
	(or (consp (car args)) (error "Syntax error on `do' clause"))
	(while (consp (car args)) (push (pop args) body))
	(push (cons 'progn (nreverse (cons t body))) loop-body)))

     ((eq word 'return)
      (or loop-finish-flag (setq loop-finish-flag (make-symbol "--cl-var--")))
      (or loop-result-var (setq loop-result-var (make-symbol "--cl-var--")))
      (push (list 'setq loop-result-var (pop args)
		  loop-finish-flag nil) loop-body))

     (t
      (let ((handler (and (symbolp word) (get word 'cl-loop-handler))))
	(or handler (error "Expected a loop keyword, found %s" word))
	(funcall handler))))
    (if (eq (car args) 'and)
	(progn (pop args) (cl-parse-loop-clause)))))

(defun cl-loop-let (specs body par)   ; uses loop-*
  (let ((p specs) (temps nil) (new nil))
    (while (and p (or (symbolp (car-safe (car p))) (null (cadar p))))
      (setq p (cdr p)))
    (and par p
	 (progn
	   (setq par nil p specs)
	   (while p
	     (or (cl-const-expr-p (cadar p))
		 (let ((temp (make-symbol "--cl-var--")))
		   (push (list temp (cadar p)) temps)
		   (setcar (cdar p) temp)))
	     (setq p (cdr p)))))
    (while specs
      (if (and (consp (car specs)) (listp (caar specs)))
	  (let* ((spec (caar specs)) (nspecs nil)
		 (expr (cadr (pop specs)))
		 (temp (cdr (or (assq spec loop-destr-temps)
				(car (push (cons spec (or (last spec 0)
							  (make-symbol "--cl-var--")))
					   loop-destr-temps))))))
	    (push (list temp expr) new)
	    (while (consp spec)
	      (push (list (pop spec)
			     (and expr (list (if spec 'pop 'car) temp)))
		       nspecs))
	    (setq specs (nconc (nreverse nspecs) specs)))
	(push (pop specs) new)))
    (if (eq body 'setq)
	(let ((set (cons (if par 'psetq 'setq) (apply 'nconc (nreverse new)))))
	  (if temps (list 'let* (nreverse temps) set) set))
      (list* (if par 'let 'let*)
	     (nconc (nreverse temps) (nreverse new)) body))))

(defun cl-loop-handle-accum (def &optional func)   ; uses args, loop-*
  (if (eq (car args) 'into)
      (let ((var (cl-pop2 args)))
	(or (memq var loop-accum-vars)
	    (progn (push (list (list var def)) loop-bindings)
		   (push var loop-accum-vars)))
	var)
    (or loop-accum-var
	(progn
	  (push (list (list (setq loop-accum-var (make-symbol "--cl-var--")) def))
		   loop-bindings)
	  (setq loop-result (if func (list func loop-accum-var)
			      loop-accum-var))
	  loop-accum-var))))

(defun cl-loop-build-ands (clauses)
  (let ((ands nil)
	(body nil))
    (while clauses
      (if (and (eq (car-safe (car clauses)) 'progn)
	       (eq (car (last (car clauses))) t))
	  (if (cdr clauses)
	      (setq clauses (cons (nconc (butlast (car clauses))
					 (if (eq (car-safe (cadr clauses))
						 'progn)
					     (cdadr clauses)
					   (list (cadr clauses))))
				  (cddr clauses)))
	    (setq body (cdr (butlast (pop clauses)))))
	(push (pop clauses) ands)))
    (setq ands (or (nreverse ands) (list t)))
    (list (if (cdr ands) (cons 'and ands) (car ands))
	  body
	  (let ((full (if body
			  (append ands (list (cons 'progn (append body '(t)))))
			ands)))
	    (if (cdr full) (cons 'and full) (car full))))))


;;; Other iteration control structures.

(defmacro do (steps endtest &rest body)
  "The Common Lisp `do' loop.

\(fn ((VAR INIT [STEP])...) (END-TEST [RESULT...]) BODY...)"
  (cl-expand-do-loop steps endtest body nil))

(defmacro do* (steps endtest &rest body)
  "The Common Lisp `do*' loop.

\(fn ((VAR INIT [STEP])...) (END-TEST [RESULT...]) BODY...)"
  (cl-expand-do-loop steps endtest body t))

(defun cl-expand-do-loop (steps endtest body star)
  (list 'block nil
	(list* (if star 'let* 'let)
	       (mapcar (function (lambda (c)
				   (if (consp c) (list (car c) (nth 1 c)) c)))
		       steps)
	       (list* 'while (list 'not (car endtest))
		      (append body
			      (let ((sets (mapcar
					   (function
					    (lambda (c)
					      (and (consp c) (cdr (cdr c))
						   (list (car c) (nth 2 c)))))
					   steps)))
				(setq sets (delq nil sets))
				(and sets
				     (list (cons (if (or star (not (cdr sets)))
						     'setq 'psetq)
						 (apply 'append sets)))))))
	       (or (cdr endtest) '(nil)))))

(defmacro dolist (spec &rest body)
  "Loop over a list.
Evaluate BODY with VAR bound to each `car' from LIST, in turn.
Then evaluate RESULT to get return value, default nil.

\(fn (VAR LIST [RESULT]) BODY...)"
  (let ((temp (make-symbol "--cl-dolist-temp--")))
    (list 'block nil
	  (list* 'let (list (list temp (nth 1 spec)) (car spec))
		 (list* 'while temp (list 'setq (car spec) (list 'car temp))
			(append body (list (list 'setq temp
						 (list 'cdr temp)))))
		 (if (cdr (cdr spec))
		     (cons (list 'setq (car spec) nil) (cdr (cdr spec)))
		   '(nil))))))

(defmacro dotimes (spec &rest body)
  "Loop a certain number of times.
Evaluate BODY with VAR bound to successive integers from 0, inclusive,
to COUNT, exclusive.  Then evaluate RESULT to get return value, default
nil.

\(fn (VAR COUNT [RESULT]) BODY...)"
  (let ((temp (make-symbol "--cl-dotimes-temp--")))
    (list 'block nil
	  (list* 'let (list (list temp (nth 1 spec)) (list (car spec) 0))
		 (list* 'while (list '< (car spec) temp)
			(append body (list (list 'incf (car spec)))))
		 (or (cdr (cdr spec)) '(nil))))))

(defmacro do-symbols (spec &rest body)
  "Loop over all symbols.
Evaluate BODY with VAR bound to each interned symbol, or to each symbol
from OBARRAY.

\(fn (VAR [OBARRAY [RESULT]]) BODY...)"
  ;; Apparently this doesn't have an implicit block.
  (list 'block nil
	(list 'let (list (car spec))
	      (list* 'mapatoms
		     (list 'function (list* 'lambda (list (car spec)) body))
		     (and (cadr spec) (list (cadr spec))))
	      (caddr spec))))

(defmacro do-all-symbols (spec &rest body)
  (list* 'do-symbols (list (car spec) nil (cadr spec)) body))


;;; Assignments.

(defmacro psetq (&rest args)
  "Set SYMs to the values VALs in parallel.
This is like `setq', except that all VAL forms are evaluated (in order)
before assigning any symbols SYM to the corresponding values.

\(fn SYM VAL SYM VAL ...)"
  (cons 'psetf args))


;;; Binding control structures.

(defmacro progv (symbols values &rest body)
  "Bind SYMBOLS to VALUES dynamically in BODY.
The forms SYMBOLS and VALUES are evaluated, and must evaluate to lists.
Each symbol in the first list is bound to the corresponding value in the
second list (or made unbound if VALUES is shorter than SYMBOLS); then the
BODY forms are executed and their result is returned.  This is much like
a `let' form, except that the list of symbols can be computed at run-time."
  (list 'let '((cl-progv-save nil))
	(list 'unwind-protect
	      (list* 'progn (list 'cl-progv-before symbols values) body)
	      '(cl-progv-after))))

;;; This should really have some way to shadow 'byte-compile properties, etc.
(defmacro flet (bindings &rest body)
  "Make temporary function definitions.
This is an analogue of `let' that operates on the function cell of FUNC
rather than its value cell.  The FORMs are evaluated with the specified
function definitions in place, then the definitions are undone (the FUNCs
go back to their previous definitions, or lack thereof).

\(fn ((FUNC ARGLIST BODY...) ...) FORM...)"
  (list* 'letf*
	 (mapcar
	  (function
	   (lambda (x)
	     (if (or (and (fboundp (car x))
			  (eq (car-safe (symbol-function (car x))) 'macro))
		     (cdr (assq (car x) cl-macro-environment)))
		 (error "Use `labels', not `flet', to rebind macro names"))
	     (let ((func (list 'function*
			       (list 'lambda (cadr x)
				     (list* 'block (car x) (cddr x))))))
	       (if (and (cl-compiling-file)
			(boundp 'byte-compile-function-environment))
		   (push (cons (car x) (eval func))
			    byte-compile-function-environment))
	       (list (list 'symbol-function (list 'quote (car x))) func))))
	  bindings)
	 body))

(defmacro labels (bindings &rest body)
  "Make temporary function bindings.
This is like `flet', except the bindings are lexical instead of dynamic.
Unlike `flet', this macro is fully compliant with the Common Lisp standard.

\(fn ((FUNC ARGLIST BODY...) ...) FORM...)"
  (let ((vars nil) (sets nil) (cl-macro-environment cl-macro-environment))
    (while bindings
      ;; Use `gensym' rather than `make-symbol'.  It's important that
      ;; (not (eq (symbol-name var1) (symbol-name var2))) because these
      ;; vars get added to the cl-macro-environment.
      (let ((var (gensym "--cl-var--")))
	(push var vars)
	(push (list 'function* (cons 'lambda (cdar bindings))) sets)
	(push var sets)
	(push (list (car (pop bindings)) 'lambda '(&rest cl-labels-args)
		       (list 'list* '(quote funcall) (list 'quote var)
			     'cl-labels-args))
		 cl-macro-environment)))
    (cl-macroexpand-all (list* 'lexical-let vars (cons (cons 'setq sets) body))
			cl-macro-environment)))

;; The following ought to have a better definition for use with newer
;; byte compilers.
(defmacro macrolet (bindings &rest body)
  "Make temporary macro definitions.
This is like `flet', but for macros instead of functions.

\(fn ((NAME ARGLIST BODY...) ...) FORM...)"
  (if (cdr bindings)
      (list 'macrolet
	    (list (car bindings)) (list* 'macrolet (cdr bindings) body))
    (if (null bindings) (cons 'progn body)
      (let* ((name (caar bindings))
	     (res (cl-transform-lambda (cdar bindings) name)))
	(eval (car res))
	(cl-macroexpand-all (cons 'progn body)
			    (cons (list* name 'lambda (cdr res))
				  cl-macro-environment))))))

(defmacro symbol-macrolet (bindings &rest body)
  "Make symbol macro definitions.
Within the body FORMs, references to the variable NAME will be replaced
by EXPANSION, and (setq NAME ...) will act like (setf EXPANSION ...).

\(fn ((NAME EXPANSION) ...) FORM...)"
  (if (cdr bindings)
      (list 'symbol-macrolet
	    (list (car bindings)) (list* 'symbol-macrolet (cdr bindings) body))
    (if (null bindings) (cons 'progn body)
      (cl-macroexpand-all (cons 'progn body)
			  (cons (list (symbol-name (caar bindings))
				      (cadar bindings))
				cl-macro-environment)))))

(defvar cl-closure-vars nil)
(defmacro lexical-let (bindings &rest body)
  "Like `let', but lexically scoped.
The main visible difference is that lambdas inside BODY will create
lexical closures as in Common Lisp.
\n(fn VARLIST BODY)"
  (let* ((cl-closure-vars cl-closure-vars)
	 (vars (mapcar (function
			(lambda (x)
			  (or (consp x) (setq x (list x)))
			  (push (make-symbol (format "--cl-%s--" (car x)))
				cl-closure-vars)
			  (set (car cl-closure-vars) [bad-lexical-ref])
			  (list (car x) (cadr x) (car cl-closure-vars))))
		       bindings))
	 (ebody
	  (cl-macroexpand-all
	   (cons 'progn body)
	   (nconc (mapcar (function (lambda (x)
				      (list (symbol-name (car x))
					    (list 'symbol-value (caddr x))
					    t))) vars)
		  (list '(defun . cl-defun-expander))
		  cl-macro-environment))))
    (if (not (get (car (last cl-closure-vars)) 'used))
	(list 'let (mapcar (function (lambda (x)
				       (list (caddr x) (cadr x)))) vars)
	      (sublis (mapcar (function (lambda (x)
					  (cons (caddr x)
						(list 'quote (caddr x)))))
			      vars)
		      ebody))
      (list 'let (mapcar (function (lambda (x)
				     (list (caddr x)
					   (list 'make-symbol
						 (format "--%s--" (car x))))))
			 vars)
	    (apply 'append '(setf)
		   (mapcar (function
			    (lambda (x)
			      (list (list 'symbol-value (caddr x)) (cadr x))))
			   vars))
	    ebody))))

(defmacro lexical-let* (bindings &rest body)
  "Like `let*', but lexically scoped.
The main visible difference is that lambdas inside BODY will create
lexical closures as in Common Lisp.
\n(fn VARLIST BODY)"
  (if (null bindings) (cons 'progn body)
    (setq bindings (reverse bindings))
    (while bindings
      (setq body (list (list* 'lexical-let (list (pop bindings)) body))))
    (car body)))

(defun cl-defun-expander (func &rest rest)
  (list 'progn
	(list 'defalias (list 'quote func)
	      (list 'function (cons 'lambda rest)))
	(list 'quote func)))


;;; Multiple values.

(defmacro multiple-value-bind (vars form &rest body)
  "Collect multiple return values.
FORM must return a list; the BODY is then executed with the first N elements
of this list bound (`let'-style) to each of the symbols SYM in turn.  This
is analogous to the Common Lisp `multiple-value-bind' macro, using lists to
simulate true multiple return values.  For compatibility, (values A B C) is
a synonym for (list A B C).

\(fn (SYM...) FORM BODY)"
  (let ((temp (make-symbol "--cl-var--")) (n -1))
    (list* 'let* (cons (list temp form)
		       (mapcar (function
				(lambda (v)
				  (list v (list 'nth (setq n (1+ n)) temp))))
			       vars))
	   body)))

(defmacro multiple-value-setq (vars form)
  "Collect multiple return values.
FORM must return a list; the first N elements of this list are stored in
each of the symbols SYM in turn.  This is analogous to the Common Lisp
`multiple-value-setq' macro, using lists to simulate true multiple return
values.  For compatibility, (values A B C) is a synonym for (list A B C).

\(fn (SYM...) FORM)"
  (cond ((null vars) (list 'progn form nil))
	((null (cdr vars)) (list 'setq (car vars) (list 'car form)))
	(t
	 (let* ((temp (make-symbol "--cl-var--")) (n 0))
	   (list 'let (list (list temp form))
		 (list 'prog1 (list 'setq (pop vars) (list 'car temp))
		       (cons 'setq (apply 'nconc
					  (mapcar (function
						   (lambda (v)
						     (list v (list
							      'nth
							      (setq n (1+ n))
							      temp))))
						  vars)))))))))


;;; Declarations.

(defmacro locally (&rest body) (cons 'progn body))
(defmacro the (type form) form)

(defvar cl-proclaim-history t)    ; for future compilers
(defvar cl-declare-stack t)       ; for future compilers

(defun cl-do-proclaim (spec hist)
  (and hist (listp cl-proclaim-history) (push spec cl-proclaim-history))
  (cond ((eq (car-safe spec) 'special)
	 (if (boundp 'byte-compile-bound-variables)
	     (setq byte-compile-bound-variables
		   (append (cdr spec) byte-compile-bound-variables))))

	((eq (car-safe spec) 'inline)
	 (while (setq spec (cdr spec))
	   (or (memq (get (car spec) 'byte-optimizer)
		     '(nil byte-compile-inline-expand))
	       (error "%s already has a byte-optimizer, can't make it inline"
		      (car spec)))
	   (put (car spec) 'byte-optimizer 'byte-compile-inline-expand)))

	((eq (car-safe spec) 'notinline)
	 (while (setq spec (cdr spec))
	   (if (eq (get (car spec) 'byte-optimizer)
		   'byte-compile-inline-expand)
	       (put (car spec) 'byte-optimizer nil))))

	((eq (car-safe spec) 'optimize)
	 (let ((speed (assq (nth 1 (assq 'speed (cdr spec)))
			    '((0 nil) (1 t) (2 t) (3 t))))
	       (safety (assq (nth 1 (assq 'safety (cdr spec)))
			     '((0 t) (1 t) (2 t) (3 nil)))))
	   (if speed (setq cl-optimize-speed (car speed)
			   byte-optimize (nth 1 speed)))
	   (if safety (setq cl-optimize-safety (car safety)
			    byte-compile-delete-errors (nth 1 safety)))))

	((and (eq (car-safe spec) 'warn) (boundp 'byte-compile-warnings))
	 (if (eq byte-compile-warnings t)
	     (setq byte-compile-warnings byte-compile-warning-types))
	 (while (setq spec (cdr spec))
	   (if (consp (car spec))
	       (if (eq (cadar spec) 0)
		   (setq byte-compile-warnings
			 (delq (caar spec) byte-compile-warnings))
		 (setq byte-compile-warnings
		       (adjoin (caar spec) byte-compile-warnings)))))))
  nil)

;;; Process any proclamations made before cl-macs was loaded.
(defvar cl-proclaims-deferred)
(let ((p (reverse cl-proclaims-deferred)))
  (while p (cl-do-proclaim (pop p) t))
  (setq cl-proclaims-deferred nil))

(defmacro declare (&rest specs)
  (if (cl-compiling-file)
      (while specs
	(if (listp cl-declare-stack) (push (car specs) cl-declare-stack))
	(cl-do-proclaim (pop specs) nil)))
  nil)



;;; Generalized variables.

(defmacro define-setf-method (func args &rest body)
  "Define a `setf' method.
This method shows how to handle `setf's to places of the form (NAME ARGS...).
The argument forms ARGS are bound according to ARGLIST, as if NAME were
going to be expanded as a macro, then the BODY forms are executed and must
return a list of five elements: a temporary-variables list, a value-forms
list, a store-variables list (of length one), a store-form, and an access-
form.  See `defsetf' for a simpler way to define most setf-methods.

\(fn NAME ARGLIST BODY...)"
  (append '(eval-when (compile load eval))
	  (if (stringp (car body))
	      (list (list 'put (list 'quote func) '(quote setf-documentation)
			  (pop body))))
	  (list (cl-transform-function-property
		 func 'setf-method (cons args body)))))
(defalias 'define-setf-expander 'define-setf-method)

(defmacro defsetf (func arg1 &rest args)
  "(defsetf NAME FUNC): define a `setf' method.
This macro is an easy-to-use substitute for `define-setf-method' that works
well for simple place forms.  In the simple `defsetf' form, `setf's of
the form (setf (NAME ARGS...) VAL) are transformed to function or macro
calls of the form (FUNC ARGS... VAL).  Example:

  (defsetf aref aset)

Alternate form: (defsetf NAME ARGLIST (STORE) BODY...).
Here, the above `setf' call is expanded by binding the argument forms ARGS
according to ARGLIST, binding the value form VAL to STORE, then executing
BODY, which must return a Lisp form that does the necessary `setf' operation.
Actually, ARGLIST and STORE may be bound to temporary variables which are
introduced automatically to preserve proper execution order of the arguments.
Example:

  (defsetf nth (n x) (v) (list 'setcar (list 'nthcdr n x) v))

\(fn NAME [FUNC | ARGLIST (STORE) BODY...])"
  (if (listp arg1)
      (let* ((largs nil) (largsr nil)
	     (temps nil) (tempsr nil)
	     (restarg nil) (rest-temps nil)
	     (store-var (car (prog1 (car args) (setq args (cdr args)))))
	     (store-temp (intern (format "--%s--temp--" store-var)))
	     (lets1 nil) (lets2 nil)
	     (docstr nil) (p arg1))
	(if (stringp (car args))
	    (setq docstr (prog1 (car args) (setq args (cdr args)))))
	(while (and p (not (eq (car p) '&aux)))
	  (if (eq (car p) '&rest)
	      (setq p (cdr p) restarg (car p))
	    (or (memq (car p) '(&optional &key &allow-other-keys))
		(setq largs (cons (if (consp (car p)) (car (car p)) (car p))
				  largs)
		      temps (cons (intern (format "--%s--temp--" (car largs)))
				  temps))))
	  (setq p (cdr p)))
	(setq largs (nreverse largs) temps (nreverse temps))
	(if restarg
	    (setq largsr (append largs (list restarg))
		  rest-temps (intern (format "--%s--temp--" restarg))
		  tempsr (append temps (list rest-temps)))
	  (setq largsr largs tempsr temps))
	(let ((p1 largs) (p2 temps))
	  (while p1
	    (setq lets1 (cons `(,(car p2)
				(make-symbol ,(format "--cl-%s--" (car p1))))
			      lets1)
		  lets2 (cons (list (car p1) (car p2)) lets2)
		  p1 (cdr p1) p2 (cdr p2))))
	(if restarg (setq lets2 (cons (list restarg rest-temps) lets2)))
	`(define-setf-method ,func ,arg1
	   ,@(and docstr (list docstr))
	   (let*
	       ,(nreverse
		 (cons `(,store-temp
			 (make-symbol ,(format "--cl-%s--" store-var)))
		       (if restarg
			   `((,rest-temps
			      (mapcar (lambda (_) (make-symbol "--cl-var--"))
				      ,restarg))
			     ,@lets1)
			 lets1)))
	     (list			; 'values
	      (,(if restarg 'list* 'list) ,@tempsr)
	      (,(if restarg 'list* 'list) ,@largsr)
	      (list ,store-temp)
	      (let*
		  ,(nreverse
		    (cons (list store-var store-temp)
			  lets2))
		,@args)
	      (,(if restarg 'list* 'list)
	       ,@(cons (list 'quote func) tempsr))))))
    `(defsetf ,func (&rest args) (store)
       ,(let ((call `(cons ',arg1
			   (append args (list store)))))
	  (if (car args)
	      `(list 'progn ,call store)
	    call)))))

;;; Some standard place types from Common Lisp.
(defsetf aref aset)
(defsetf car setcar)
(defsetf cdr setcdr)
(defsetf caar (x) (val) (list 'setcar (list 'car x) val))
(defsetf cadr (x) (val) (list 'setcar (list 'cdr x) val))
(defsetf cdar (x) (val) (list 'setcdr (list 'car x) val))
(defsetf cddr (x) (val) (list 'setcdr (list 'cdr x) val))
(defsetf elt (seq n) (store)
  (list 'if (list 'listp seq) (list 'setcar (list 'nthcdr n seq) store)
	(list 'aset seq n store)))
(defsetf get put)
(defsetf get* (x y &optional d) (store) (list 'put x y store))
(defsetf gethash (x h &optional d) (store) (list 'puthash x store h))
(defsetf nth (n x) (store) (list 'setcar (list 'nthcdr n x) store))
(defsetf subseq (seq start &optional end) (new)
  (list 'progn (list 'replace seq new :start1 start :end1 end) new))
(defsetf symbol-function fset)
(defsetf symbol-plist setplist)
(defsetf symbol-value set)

;;; Various car/cdr aliases.  Note that `cadr' is handled specially.
(defsetf first setcar)
(defsetf second (x) (store) (list 'setcar (list 'cdr x) store))
(defsetf third (x) (store) (list 'setcar (list 'cddr x) store))
(defsetf fourth (x) (store) (list 'setcar (list 'cdddr x) store))
(defsetf fifth (x) (store) (list 'setcar (list 'nthcdr 4 x) store))
(defsetf sixth (x) (store) (list 'setcar (list 'nthcdr 5 x) store))
(defsetf seventh (x) (store) (list 'setcar (list 'nthcdr 6 x) store))
(defsetf eighth (x) (store) (list 'setcar (list 'nthcdr 7 x) store))
(defsetf ninth (x) (store) (list 'setcar (list 'nthcdr 8 x) store))
(defsetf tenth (x) (store) (list 'setcar (list 'nthcdr 9 x) store))
(defsetf rest setcdr)

;;; Some more Emacs-related place types.
(defsetf buffer-file-name set-visited-file-name t)
(defsetf buffer-modified-p (&optional buf) (flag)
  (list 'with-current-buffer buf
	(list 'set-buffer-modified-p flag)))
(defsetf buffer-name rename-buffer t)
(defsetf buffer-string () (store)
  (list 'progn '(erase-buffer) (list 'insert store)))
(defsetf buffer-substring cl-set-buffer-substring)
(defsetf current-buffer set-buffer)
(defsetf current-case-table set-case-table)
(defsetf current-column move-to-column t)
(defsetf current-global-map use-global-map t)
(defsetf current-input-mode () (store)
  (list 'progn (list 'apply 'set-input-mode store) store))
(defsetf current-local-map use-local-map t)
(defsetf current-window-configuration set-window-configuration t)
(defsetf default-file-modes set-default-file-modes t)
(defsetf default-value set-default)
(defsetf documentation-property put)
(defsetf extent-data set-extent-data)
(defsetf extent-face set-extent-face)
(defsetf extent-priority set-extent-priority)
(defsetf extent-end-position (ext) (store)
  (list 'progn (list 'set-extent-endpoints (list 'extent-start-position ext)
		     store) store))
(defsetf extent-start-position (ext) (store)
  (list 'progn (list 'set-extent-endpoints store
		     (list 'extent-end-position ext)) store))
(defsetf face-background (f &optional s) (x) (list 'set-face-background f x s))
(defsetf face-background-pixmap (f &optional s) (x)
  (list 'set-face-background-pixmap f x s))
(defsetf face-font (f &optional s) (x) (list 'set-face-font f x s))
(defsetf face-foreground (f &optional s) (x) (list 'set-face-foreground f x s))
(defsetf face-underline-p (f &optional s) (x)
  (list 'set-face-underline-p f x s))
(defsetf file-modes set-file-modes t)
(defsetf frame-height set-screen-height t)
(defsetf frame-parameters modify-frame-parameters t)
(defsetf frame-visible-p cl-set-frame-visible-p)
(defsetf frame-width set-screen-width t)
(defsetf frame-parameter set-frame-parameter)
(defsetf getenv setenv t)
(defsetf get-register set-register)
(defsetf global-key-binding global-set-key)
(defsetf keymap-parent set-keymap-parent)
(defsetf local-key-binding local-set-key)
(defsetf mark set-mark t)
(defsetf mark-marker set-mark t)
(defsetf marker-position set-marker t)
(defsetf match-data set-match-data t)
(defsetf mouse-position (scr) (store)
  (list 'set-mouse-position scr (list 'car store) (list 'cadr store)
	(list 'cddr store)))
(defsetf overlay-get overlay-put)
(defsetf overlay-start (ov) (store)
  (list 'progn (list 'move-overlay ov store (list 'overlay-end ov)) store))
(defsetf overlay-end (ov) (store)
  (list 'progn (list 'move-overlay ov (list 'overlay-start ov) store) store))
(defsetf point goto-char)
(defsetf point-marker goto-char t)
(defsetf point-max () (store)
  (list 'progn (list 'narrow-to-region '(point-min) store) store))
(defsetf point-min () (store)
  (list 'progn (list 'narrow-to-region store '(point-max)) store))
(defsetf process-buffer set-process-buffer)
(defsetf process-filter set-process-filter)
(defsetf process-sentinel set-process-sentinel)
(defsetf process-get process-put)
(defsetf read-mouse-position (scr) (store)
  (list 'set-mouse-position scr (list 'car store) (list 'cdr store)))
(defsetf screen-height set-screen-height t)
(defsetf screen-width set-screen-width t)
(defsetf selected-window select-window)
(defsetf selected-screen select-screen)
(defsetf selected-frame select-frame)
(defsetf standard-case-table set-standard-case-table)
(defsetf syntax-table set-syntax-table)
(defsetf visited-file-modtime set-visited-file-modtime t)
(defsetf window-buffer set-window-buffer t)
(defsetf window-display-table set-window-display-table t)
(defsetf window-dedicated-p set-window-dedicated-p t)
(defsetf window-height () (store)
  (list 'progn (list 'enlarge-window (list '- store '(window-height))) store))
(defsetf window-hscroll set-window-hscroll)
(defsetf window-point set-window-point)
(defsetf window-start set-window-start)
(defsetf window-width () (store)
  (list 'progn (list 'enlarge-window (list '- store '(window-width)) t) store))
(defsetf x-get-cutbuffer x-store-cutbuffer t)
(defsetf x-get-cut-buffer x-store-cut-buffer t)   ; groan.
(defsetf x-get-secondary-selection x-own-secondary-selection t)
(defsetf x-get-selection x-own-selection t)

;;; More complex setf-methods.
;;; These should take &environment arguments, but since full arglists aren't
;;; available while compiling cl-macs, we fake it by referring to the global
;;; variable cl-macro-environment directly.

(define-setf-method apply (func arg1 &rest rest)
  (or (and (memq (car-safe func) '(quote function function*))
	   (symbolp (car-safe (cdr-safe func))))
      (error "First arg to apply in setf is not (function SYM): %s" func))
  (let* ((form (cons (nth 1 func) (cons arg1 rest)))
	 (method (get-setf-method form cl-macro-environment)))
    (list (car method) (nth 1 method) (nth 2 method)
	  (cl-setf-make-apply (nth 3 method) (cadr func) (car method))
	  (cl-setf-make-apply (nth 4 method) (cadr func) (car method)))))

(defun cl-setf-make-apply (form func temps)
  (if (eq (car form) 'progn)
      (list* 'progn (cl-setf-make-apply (cadr form) func temps) (cddr form))
    (or (equal (last form) (last temps))
	(error "%s is not suitable for use with setf-of-apply" func))
    (list* 'apply (list 'quote (car form)) (cdr form))))

(define-setf-method nthcdr (n place)
  (let ((method (get-setf-method place cl-macro-environment))
	(n-temp (make-symbol "--cl-nthcdr-n--"))
	(store-temp (make-symbol "--cl-nthcdr-store--")))
    (list (cons n-temp (car method))
	  (cons n (nth 1 method))
	  (list store-temp)
	  (list 'let (list (list (car (nth 2 method))
				 (list 'cl-set-nthcdr n-temp (nth 4 method)
				       store-temp)))
		(nth 3 method) store-temp)
	  (list 'nthcdr n-temp (nth 4 method)))))

(define-setf-method getf (place tag &optional def)
  (let ((method (get-setf-method place cl-macro-environment))
	(tag-temp (make-symbol "--cl-getf-tag--"))
	(def-temp (make-symbol "--cl-getf-def--"))
	(store-temp (make-symbol "--cl-getf-store--")))
    (list (append (car method) (list tag-temp def-temp))
	  (append (nth 1 method) (list tag def))
	  (list store-temp)
	  (list 'let (list (list (car (nth 2 method))
				 (list 'cl-set-getf (nth 4 method)
				       tag-temp store-temp)))
		(nth 3 method) store-temp)
	  (list 'getf (nth 4 method) tag-temp def-temp))))

(define-setf-method substring (place from &optional to)
  (let ((method (get-setf-method place cl-macro-environment))
	(from-temp (make-symbol "--cl-substring-from--"))
	(to-temp (make-symbol "--cl-substring-to--"))
	(store-temp (make-symbol "--cl-substring-store--")))
    (list (append (car method) (list from-temp to-temp))
	  (append (nth 1 method) (list from to))
	  (list store-temp)
	  (list 'let (list (list (car (nth 2 method))
				 (list 'cl-set-substring (nth 4 method)
				       from-temp to-temp store-temp)))
		(nth 3 method) store-temp)
	  (list 'substring (nth 4 method) from-temp to-temp))))

;;; Getting and optimizing setf-methods.
(defun get-setf-method (place &optional env)
  "Return a list of five values describing the setf-method for PLACE.
PLACE may be any Lisp form which can appear as the PLACE argument to
a macro like `setf' or `incf'."
  (if (symbolp place)
      (let ((temp (make-symbol "--cl-setf--")))
	(list nil nil (list temp) (list 'setq place temp) place))
    (or (and (symbolp (car place))
	     (let* ((func (car place))
		    (name (symbol-name func))
		    (method (get func 'setf-method))
		    (case-fold-search nil))
	       (or (and method
			(let ((cl-macro-environment env))
			  (setq method (apply method (cdr place))))
			(if (and (consp method) (= (length method) 5))
			    method
			  (error "Setf-method for %s returns malformed method"
				 func)))
		   (and (save-match-data
			  (string-match "\\`c[ad][ad][ad]?[ad]?r\\'" name))
			(get-setf-method (compiler-macroexpand place)))
		   (and (eq func 'edebug-after)
			(get-setf-method (nth (1- (length place)) place)
					 env)))))
	(if (eq place (setq place (macroexpand place env)))
	    (if (and (symbolp (car place)) (fboundp (car place))
		     (symbolp (symbol-function (car place))))
		(get-setf-method (cons (symbol-function (car place))
				       (cdr place)) env)
	      (error "No setf-method known for %s" (car place)))
	  (get-setf-method place env)))))

(defun cl-setf-do-modify (place opt-expr)
  (let* ((method (get-setf-method place cl-macro-environment))
	 (temps (car method)) (values (nth 1 method))
	 (lets nil) (subs nil)
	 (optimize (and (not (eq opt-expr 'no-opt))
			(or (and (not (eq opt-expr 'unsafe))
				 (cl-safe-expr-p opt-expr))
			    (cl-setf-simple-store-p (car (nth 2 method))
						    (nth 3 method)))))
	 (simple (and optimize (consp place) (cl-simple-exprs-p (cdr place)))))
    (while values
      (if (or simple (cl-const-expr-p (car values)))
	  (push (cons (pop temps) (pop values)) subs)
	(push (list (pop temps) (pop values)) lets)))
    (list (nreverse lets)
	  (cons (car (nth 2 method)) (sublis subs (nth 3 method)))
	  (sublis subs (nth 4 method)))))

(defun cl-setf-do-store (spec val)
  (let ((sym (car spec))
	(form (cdr spec)))
    (if (or (cl-const-expr-p val)
	    (and (cl-simple-expr-p val) (eq (cl-expr-contains form sym) 1))
	    (cl-setf-simple-store-p sym form))
	(subst val sym form)
      (list 'let (list (list sym val)) form))))

(defun cl-setf-simple-store-p (sym form)
  (and (consp form) (eq (cl-expr-contains form sym) 1)
       (eq (nth (1- (length form)) form) sym)
       (symbolp (car form)) (fboundp (car form))
       (not (eq (car-safe (symbol-function (car form))) 'macro))))

;;; The standard modify macros.
(defmacro setf (&rest args)
  "Set each PLACE to the value of its VAL.
This is a generalized version of `setq'; the PLACEs may be symbolic
references such as (car x) or (aref x i), as well as plain symbols.
For example, (setf (cadar x) y) is equivalent to (setcar (cdar x) y).
The return value is the last VAL in the list.

\(fn PLACE VAL PLACE VAL ...)"
  (if (cdr (cdr args))
      (let ((sets nil))
	(while args (push (list 'setf (pop args) (pop args)) sets))
	(cons 'progn (nreverse sets)))
    (if (symbolp (car args))
	(and args (cons 'setq args))
      (let* ((method (cl-setf-do-modify (car args) (nth 1 args)))
	     (store (cl-setf-do-store (nth 1 method) (nth 1 args))))
	(if (car method) (list 'let* (car method) store) store)))))

(defmacro psetf (&rest args)
  "Set PLACEs to the values VALs in parallel.
This is like `setf', except that all VAL forms are evaluated (in order)
before assigning any PLACEs to the corresponding values.

\(fn PLACE VAL PLACE VAL ...)"
  (let ((p args) (simple t) (vars nil))
    (while p
      (if (or (not (symbolp (car p))) (cl-expr-depends-p (nth 1 p) vars))
	  (setq simple nil))
      (if (memq (car p) vars)
	  (error "Destination duplicated in psetf: %s" (car p)))
      (push (pop p) vars)
      (or p (error "Odd number of arguments to psetf"))
      (pop p))
    (if simple
	(list 'progn (cons 'setf args) nil)
      (setq args (reverse args))
      (let ((expr (list 'setf (cadr args) (car args))))
	(while (setq args (cddr args))
	  (setq expr (list 'setf (cadr args) (list 'prog1 (car args) expr))))
	(list 'progn expr nil)))))

(defun cl-do-pop (place)
  (if (cl-simple-expr-p place)
      (list 'prog1 (list 'car place) (list 'setf place (list 'cdr place)))
    (let* ((method (cl-setf-do-modify place t))
	   (temp (make-symbol "--cl-pop--")))
      (list 'let*
	    (append (car method)
		    (list (list temp (nth 2 method))))
	    (list 'prog1
		  (list 'car temp)
		  (cl-setf-do-store (nth 1 method) (list 'cdr temp)))))))

(defmacro remf (place tag)
  "Remove TAG from property list PLACE.
PLACE may be a symbol, or any generalized variable allowed by `setf'.
The form returns true if TAG was found and removed, nil otherwise."
  (let* ((method (cl-setf-do-modify place t))
	 (tag-temp (and (not (cl-const-expr-p tag)) (make-symbol "--cl-remf-tag--")))
	 (val-temp (and (not (cl-simple-expr-p place))
			(make-symbol "--cl-remf-place--")))
	 (ttag (or tag-temp tag))
	 (tval (or val-temp (nth 2 method))))
    (list 'let*
	  (append (car method)
		  (and val-temp (list (list val-temp (nth 2 method))))
		  (and tag-temp (list (list tag-temp tag))))
	  (list 'if (list 'eq ttag (list 'car tval))
		(list 'progn
		      (cl-setf-do-store (nth 1 method) (list 'cddr tval))
		      t)
		(list 'cl-do-remf tval ttag)))))

(defmacro shiftf (place &rest args)
  "Shift left among PLACEs.
Example: (shiftf A B C) sets A to B, B to C, and returns the old A.
Each PLACE may be a symbol, or any generalized variable allowed by `setf'.

\(fn PLACE... VAL)"
  (cond
   ((null args) place)
   ((symbolp place) `(prog1 ,place (setq ,place (shiftf ,@args))))
   (t
    (let ((method (cl-setf-do-modify place 'unsafe)))
      `(let* ,(car method)
	 (prog1 ,(nth 2 method)
	   ,(cl-setf-do-store (nth 1 method) `(shiftf ,@args))))))))

(defmacro rotatef (&rest args)
  "Rotate left among PLACEs.
Example: (rotatef A B C) sets A to B, B to C, and C to A.  It returns nil.
Each PLACE may be a symbol, or any generalized variable allowed by `setf'.

\(fn PLACE...)"
  (if (not (memq nil (mapcar 'symbolp args)))
      (and (cdr args)
	   (let ((sets nil)
		 (first (car args)))
	     (while (cdr args)
	       (setq sets (nconc sets (list (pop args) (car args)))))
	     (nconc (list 'psetf) sets (list (car args) first))))
    (let* ((places (reverse args))
	   (temp (make-symbol "--cl-rotatef--"))
	   (form temp))
      (while (cdr places)
	(let ((method (cl-setf-do-modify (pop places) 'unsafe)))
	  (setq form (list 'let* (car method)
			   (list 'prog1 (nth 2 method)
				 (cl-setf-do-store (nth 1 method) form))))))
      (let ((method (cl-setf-do-modify (car places) 'unsafe)))
	(list 'let* (append (car method) (list (list temp (nth 2 method))))
	      (cl-setf-do-store (nth 1 method) form) nil)))))

(defmacro letf (bindings &rest body)
  "Temporarily bind to PLACEs.
This is the analogue of `let', but with generalized variables (in the
sense of `setf') for the PLACEs.  Each PLACE is set to the corresponding
VALUE, then the BODY forms are executed.  On exit, either normally or
because of a `throw' or error, the PLACEs are set back to their original
values.  Note that this macro is *not* available in Common Lisp.
As a special case, if `(PLACE)' is used instead of `(PLACE VALUE)',
the PLACE is not modified before executing BODY.

\(fn ((PLACE VALUE) ...) BODY...)"
  (if (and (not (cdr bindings)) (cdar bindings) (symbolp (caar bindings)))
      (list* 'let bindings body)
    (let ((lets nil) (sets nil)
	  (unsets nil) (rev (reverse bindings)))
      (while rev
	(let* ((place (if (symbolp (caar rev))
			  (list 'symbol-value (list 'quote (caar rev)))
			(caar rev)))
	       (value (cadar rev))
	       (method (cl-setf-do-modify place 'no-opt))
	       (save (make-symbol "--cl-letf-save--"))
	       (bound (and (memq (car place) '(symbol-value symbol-function))
			   (make-symbol "--cl-letf-bound--")))
	       (temp (and (not (cl-const-expr-p value)) (cdr bindings)
			  (make-symbol "--cl-letf-val--"))))
	  (setq lets (nconc (car method)
			    (if bound
				(list (list bound
					    (list (if (eq (car place)
							  'symbol-value)
						      'boundp 'fboundp)
						  (nth 1 (nth 2 method))))
				      (list save (list 'and bound
						       (nth 2 method))))
			      (list (list save (nth 2 method))))
			    (and temp (list (list temp value)))
			    lets)
		body (list
		      (list 'unwind-protect
			    (cons 'progn
				  (if (cdr (car rev))
				      (cons (cl-setf-do-store (nth 1 method)
							      (or temp value))
					    body)
				    body))
			    (if bound
				(list 'if bound
				      (cl-setf-do-store (nth 1 method) save)
				      (list (if (eq (car place) 'symbol-value)
						'makunbound 'fmakunbound)
					    (nth 1 (nth 2 method))))
			      (cl-setf-do-store (nth 1 method) save))))
		rev (cdr rev))))
      (list* 'let* lets body))))

(defmacro letf* (bindings &rest body)
  "Temporarily bind to PLACEs.
This is the analogue of `let*', but with generalized variables (in the
sense of `setf') for the PLACEs.  Each PLACE is set to the corresponding
VALUE, then the BODY forms are executed.  On exit, either normally or
because of a `throw' or error, the PLACEs are set back to their original
values.  Note that this macro is *not* available in Common Lisp.
As a special case, if `(PLACE)' is used instead of `(PLACE VALUE)',
the PLACE is not modified before executing BODY.

\(fn ((PLACE VALUE) ...) BODY...)"
  (if (null bindings)
      (cons 'progn body)
    (setq bindings (reverse bindings))
    (while bindings
      (setq body (list (list* 'letf (list (pop bindings)) body))))
    (car body)))

(defmacro callf (func place &rest args)
  "Set PLACE to (FUNC PLACE ARGS...).
FUNC should be an unquoted function name.  PLACE may be a symbol,
or any generalized variable allowed by `setf'.

\(fn FUNC PLACE ARGS...)"
  (let* ((method (cl-setf-do-modify place (cons 'list args)))
	 (rargs (cons (nth 2 method) args)))
    (list 'let* (car method)
	  (cl-setf-do-store (nth 1 method)
			    (if (symbolp func) (cons func rargs)
			      (list* 'funcall (list 'function func)
				     rargs))))))

(defmacro callf2 (func arg1 place &rest args)
  "Set PLACE to (FUNC ARG1 PLACE ARGS...).
Like `callf', but PLACE is the second argument of FUNC, not the first.

\(fn FUNC ARG1 PLACE ARGS...)"
  (if (and (cl-safe-expr-p arg1) (cl-simple-expr-p place) (symbolp func))
      (list 'setf place (list* func arg1 place args))
    (let* ((method (cl-setf-do-modify place (cons 'list args)))
	   (temp (and (not (cl-const-expr-p arg1)) (make-symbol "--cl-arg1--")))
	   (rargs (list* (or temp arg1) (nth 2 method) args)))
      (list 'let* (append (and temp (list (list temp arg1))) (car method))
	    (cl-setf-do-store (nth 1 method)
			      (if (symbolp func) (cons func rargs)
				(list* 'funcall (list 'function func)
				       rargs)))))))

(defmacro define-modify-macro (name arglist func &optional doc)
  "Define a `setf'-like modify macro.
If NAME is called, it combines its PLACE argument with the other arguments
from ARGLIST using FUNC: (define-modify-macro incf (&optional (n 1)) +)"
  (if (memq '&key arglist) (error "&key not allowed in define-modify-macro"))
  (let ((place (make-symbol "--cl-place--")))
    (list 'defmacro* name (cons place arglist) doc
	  (list* (if (memq '&rest arglist) 'list* 'list)
		 '(quote callf) (list 'quote func) place
		 (cl-arglist-args arglist)))))


;;; Structures.

(defmacro defstruct (struct &rest descs)
  "Define a struct type.
This macro defines a new Lisp data type called NAME, which contains data
stored in SLOTs.  This defines a `make-NAME' constructor, a `copy-NAME'
copier, a `NAME-p' predicate, and setf-able `NAME-SLOT' accessors.

\(fn (NAME OPTIONS...) (SLOT SLOT-OPTS...)...)"
  (let* ((name (if (consp struct) (car struct) struct))
	 (opts (cdr-safe struct))
	 (slots nil)
	 (defaults nil)
	 (conc-name (concat (symbol-name name) "-"))
	 (constructor (intern (format "make-%s" name)))
	 (constrs nil)
	 (copier (intern (format "copy-%s" name)))
	 (predicate (intern (format "%s-p" name)))
	 (print-func nil) (print-auto nil)
	 (safety (if (cl-compiling-file) cl-optimize-safety 3))
	 (include nil)
	 (tag (intern (format "cl-struct-%s" name)))
	 (tag-symbol (intern (format "cl-struct-%s-tags" name)))
	 (include-descs nil)
	 (side-eff nil)
	 (type nil)
	 (named nil)
	 (forms nil)
	 pred-form pred-check)
    (if (stringp (car descs))
	(push (list 'put (list 'quote name) '(quote structure-documentation)
		       (pop descs)) forms))
    (setq descs (cons '(cl-tag-slot)
		      (mapcar (function (lambda (x) (if (consp x) x (list x))))
			      descs)))
    (while opts
      (let ((opt (if (consp (car opts)) (caar opts) (car opts)))
	    (args (cdr-safe (pop opts))))
	(cond ((eq opt :conc-name)
	       (if args
		   (setq conc-name (if (car args)
				       (symbol-name (car args)) ""))))
	      ((eq opt :constructor)
	       (if (cdr args)
                   (progn
                     ;; If this defines a constructor of the same name as
                     ;; the default one, don't define the default.
                     (if (eq (car args) constructor)
                         (setq constructor nil))
                     (push args constrs))
		 (if args (setq constructor (car args)))))
	      ((eq opt :copier)
	       (if args (setq copier (car args))))
	      ((eq opt :predicate)
	       (if args (setq predicate (car args))))
	      ((eq opt :include)
	       (setq include (car args)
		     include-descs (mapcar (function
					    (lambda (x)
					      (if (consp x) x (list x))))
					   (cdr args))))
	      ((eq opt :print-function)
	       (setq print-func (car args)))
	      ((eq opt :type)
	       (setq type (car args)))
	      ((eq opt :named)
	       (setq named t))
	      ((eq opt :initial-offset)
	       (setq descs (nconc (make-list (car args) '(cl-skip-slot))
				  descs)))
	      (t
	       (error "Slot option %s unrecognized" opt)))))
    (if print-func
	(setq print-func (list 'progn
			       (list 'funcall (list 'function print-func)
				     'cl-x 'cl-s 'cl-n) t))
      (or type (and include (not (get include 'cl-struct-print)))
	  (setq print-auto t
		print-func (and (or (not (or include type)) (null print-func))
				(list 'progn
				      (list 'princ (format "#S(%s" name)
					    'cl-s))))))
    (if include
	(let ((inc-type (get include 'cl-struct-type))
	      (old-descs (get include 'cl-struct-slots)))
	  (or inc-type (error "%s is not a struct name" include))
	  (and type (not (eq (car inc-type) type))
	       (error ":type disagrees with :include for %s" name))
	  (while include-descs
	    (setcar (memq (or (assq (caar include-descs) old-descs)
			      (error "No slot %s in included struct %s"
				     (caar include-descs) include))
			  old-descs)
		    (pop include-descs)))
	  (setq descs (append old-descs (delq (assq 'cl-tag-slot descs) descs))
		type (car inc-type)
		named (assq 'cl-tag-slot descs))
	  (if (cadr inc-type) (setq tag name named t))
	  (let ((incl include))
	    (while incl
	      (push (list 'pushnew (list 'quote tag)
			     (intern (format "cl-struct-%s-tags" incl)))
		       forms)
	      (setq incl (get incl 'cl-struct-include)))))
      (if type
	  (progn
	    (or (memq type '(vector list))
		(error "Invalid :type specifier: %s" type))
	    (if named (setq tag name)))
	(setq type 'vector named 'true)))
    (or named (setq descs (delq (assq 'cl-tag-slot descs) descs)))
    (push (list 'defvar tag-symbol) forms)
    (setq pred-form (and named
			 (let ((pos (- (length descs)
				       (length (memq (assq 'cl-tag-slot descs)
						     descs)))))
			   (if (eq type 'vector)
			       (list 'and '(vectorp cl-x)
				     (list '>= '(length cl-x) (length descs))
				     (list 'memq (list 'aref 'cl-x pos)
					   tag-symbol))
			     (if (= pos 0)
				 (list 'memq '(car-safe cl-x) tag-symbol)
			       (list 'and '(consp cl-x)
				     (list 'memq (list 'nth pos 'cl-x)
					   tag-symbol))))))
	  pred-check (and pred-form (> safety 0)
			  (if (and (eq (caadr pred-form) 'vectorp)
				   (= safety 1))
			      (cons 'and (cdddr pred-form)) pred-form)))
    (let ((pos 0) (descp descs))
      (while descp
	(let* ((desc (pop descp))
	       (slot (car desc)))
	  (if (memq slot '(cl-tag-slot cl-skip-slot))
	      (progn
		(push nil slots)
		(push (and (eq slot 'cl-tag-slot) (list 'quote tag))
			 defaults))
	    (if (assq slot descp)
		(error "Duplicate slots named %s in %s" slot name))
	    (let ((accessor (intern (format "%s%s" conc-name slot))))
	      (push slot slots)
	      (push (nth 1 desc) defaults)
	      (push (list*
			'defsubst* accessor '(cl-x)
			(append
			 (and pred-check
			      (list (list 'or pred-check
					  (list 'error
						(format "%s accessing a non-%s"
							accessor name)))))
			 (list (if (eq type 'vector) (list 'aref 'cl-x pos)
				 (if (= pos 0) '(car cl-x)
				   (list 'nth pos 'cl-x)))))) forms)
	      (push (cons accessor t) side-eff)
	      (push (list 'define-setf-method accessor '(cl-x)
			     (if (cadr (memq :read-only (cddr desc)))
				 (list 'error (format "%s is a read-only slot"
						      accessor))
			       ;; If cl is loaded only for compilation,
			       ;; the call to cl-struct-setf-expander would
			       ;; cause a warning because it may not be
			       ;; defined at run time.  Suppress that warning.
			       (list 'with-no-warnings
				     (list 'cl-struct-setf-expander 'cl-x
					   (list 'quote name) (list 'quote accessor)
					   (and pred-check (list 'quote pred-check))
					   pos))))
		       forms)
	      (if print-auto
		  (nconc print-func
			 (list (list 'princ (format " %s" slot) 'cl-s)
			       (list 'prin1 (list accessor 'cl-x) 'cl-s)))))))
	(setq pos (1+ pos))))
    (setq slots (nreverse slots)
	  defaults (nreverse defaults))
    (and predicate pred-form
	 (progn (push (list 'defsubst* predicate '(cl-x)
			       (if (eq (car pred-form) 'and)
				   (append pred-form '(t))
				 (list 'and pred-form t))) forms)
		(push (cons predicate 'error-free) side-eff)))
    (and copier
	 (progn (push (list 'defun copier '(x) '(copy-sequence x)) forms)
		(push (cons copier t) side-eff)))
    (if constructor
	(push (list constructor
		       (cons '&key (delq nil (copy-sequence slots))))
		 constrs))
    (while constrs
      (let* ((name (caar constrs))
	     (args (cadr (pop constrs)))
	     (anames (cl-arglist-args args))
	     (make (mapcar* (function (lambda (s d) (if (memq s anames) s d)))
			    slots defaults)))
	(push (list 'defsubst* name
		       (list* '&cl-defs (list 'quote (cons nil descs)) args)
		       (cons type make)) forms)
	(if (cl-safe-expr-p (cons 'progn (mapcar 'second descs)))
	    (push (cons name t) side-eff))))
    (if print-auto (nconc print-func (list '(princ ")" cl-s) t)))
    (if print-func
	(push (list 'push
		       (list 'function
			     (list 'lambda '(cl-x cl-s cl-n)
				   (list 'and pred-form print-func)))
		       'custom-print-functions) forms))
    (push (list 'setq tag-symbol (list 'list (list 'quote tag))) forms)
    (push (list* 'eval-when '(compile load eval)
		    (list 'put (list 'quote name) '(quote cl-struct-slots)
			  (list 'quote descs))
		    (list 'put (list 'quote name) '(quote cl-struct-type)
			  (list 'quote (list type (eq named t))))
		    (list 'put (list 'quote name) '(quote cl-struct-include)
			  (list 'quote include))
		    (list 'put (list 'quote name) '(quote cl-struct-print)
			  print-auto)
		    (mapcar (function (lambda (x)
					(list 'put (list 'quote (car x))
					      '(quote side-effect-free)
					      (list 'quote (cdr x)))))
			    side-eff))
	     forms)
    (cons 'progn (nreverse (cons (list 'quote name) forms)))))

(defun cl-struct-setf-expander (x name accessor pred-form pos)
  (let* ((temp (make-symbol "--cl-x--")) (store (make-symbol "--cl-store--")))
    (list (list temp) (list x) (list store)
	  (append '(progn)
		  (and pred-form
		       (list (list 'or (subst temp 'cl-x pred-form)
				   (list 'error
					 (format
					  "%s storing a non-%s" accessor name)))))
		  (list (if (eq (car (get name 'cl-struct-type)) 'vector)
			    (list 'aset temp pos store)
			  (list 'setcar
				(if (<= pos 5)
				    (let ((xx temp))
				      (while (>= (setq pos (1- pos)) 0)
					(setq xx (list 'cdr xx)))
				      xx)
				  (list 'nthcdr pos temp))
				store))))
	  (list accessor temp))))


;;; Types and assertions.

(defmacro deftype (name arglist &rest body)
  "Define NAME as a new data type.
The type name can then be used in `typecase', `check-type', etc."
  (list 'eval-when '(compile load eval)
	(cl-transform-function-property
	 name 'cl-deftype-handler (cons (list* '&cl-defs ''('*) arglist) body))))

(defun cl-make-type-test (val type)
  (if (symbolp type)
      (cond ((get type 'cl-deftype-handler)
	     (cl-make-type-test val (funcall (get type 'cl-deftype-handler))))
	    ((memq type '(nil t)) type)
	    ((eq type 'null) `(null ,val))
	    ((eq type 'atom) `(atom ,val))
	    ((eq type 'float) `(floatp-safe ,val))
	    ((eq type 'real) `(numberp ,val))
	    ((eq type 'fixnum) `(integerp ,val))
	    ;; FIXME: Should `character' accept things like ?\C-\M-a ?  -stef
	    ((memq type '(character string-char)) `(char-valid-p ,val))
	    (t
	     (let* ((name (symbol-name type))
		    (namep (intern (concat name "p"))))
	       (if (fboundp namep) (list namep val)
		 (list (intern (concat name "-p")) val)))))
    (cond ((get (car type) 'cl-deftype-handler)
	   (cl-make-type-test val (apply (get (car type) 'cl-deftype-handler)
					 (cdr type))))
	  ((memq (car type) '(integer float real number))
	   (delq t (list 'and (cl-make-type-test val (car type))
			 (if (memq (cadr type) '(* nil)) t
			   (if (consp (cadr type)) (list '> val (caadr type))
			     (list '>= val (cadr type))))
			 (if (memq (caddr type) '(* nil)) t
			   (if (consp (caddr type)) (list '< val (caaddr type))
			     (list '<= val (caddr type)))))))
	  ((memq (car type) '(and or not))
	   (cons (car type)
		 (mapcar (function (lambda (x) (cl-make-type-test val x)))
			 (cdr type))))
	  ((memq (car type) '(member member*))
	   (list 'and (list 'member* val (list 'quote (cdr type))) t))
	  ((eq (car type) 'satisfies) (list (cadr type) val))
	  (t (error "Bad type spec: %s" type)))))

(defun typep (object type)   ; See compiler macro below.
  "Check that OBJECT is of type TYPE.
TYPE is a Common Lisp-style type specifier."
  (eval (cl-make-type-test 'object type)))

(defmacro check-type (form type &optional string)
  "Verify that FORM is of type TYPE; signal an error if not.
STRING is an optional description of the desired type."
  (and (or (not (cl-compiling-file))
	   (< cl-optimize-speed 3) (= cl-optimize-safety 3))
       (let* ((temp (if (cl-simple-expr-p form 3)
			form (make-symbol "--cl-var--")))
	      (body (list 'or (cl-make-type-test temp type)
			  (list 'signal '(quote wrong-type-argument)
				(list 'list (or string (list 'quote type))
				      temp (list 'quote form))))))
	 (if (eq temp form) (list 'progn body nil)
	   (list 'let (list (list temp form)) body nil)))))

(defmacro assert (form &optional show-args string &rest args)
  "Verify that FORM returns non-nil; signal an error if not.
Second arg SHOW-ARGS means to include arguments of FORM in message.
Other args STRING and ARGS... are arguments to be passed to `error'.
They are not evaluated unless the assertion fails.  If STRING is
omitted, a default message listing FORM itself is used."
  (and (or (not (cl-compiling-file))
	   (< cl-optimize-speed 3) (= cl-optimize-safety 3))
       (let ((sargs (and show-args (delq nil (mapcar
					      (function
					       (lambda (x)
						 (and (not (cl-const-expr-p x))
						      x))) (cdr form))))))
	 (list 'progn
	       (list 'or form
		     (if string
			 (list* 'error string (append sargs args))
		       (list 'signal '(quote cl-assertion-failed)
			     (list* 'list (list 'quote form) sargs))))
	       nil))))

(defmacro ignore-errors (&rest body)
  "Execute BODY; if an error occurs, return nil.
Otherwise, return result of last form in BODY."
  `(condition-case nil (progn ,@body) (error nil)))


;;; Compiler macros.

(defmacro define-compiler-macro (func args &rest body)
  "Define a compiler-only macro.
This is like `defmacro', but macro expansion occurs only if the call to
FUNC is compiled (i.e., not interpreted).  Compiler macros should be used
for optimizing the way calls to FUNC are compiled; the form returned by
BODY should do the same thing as a call to the normal function called
FUNC, though possibly more efficiently.  Note that, like regular macros,
compiler macros are expanded repeatedly until no further expansions are
possible.  Unlike regular macros, BODY can decide to \"punt\" and leave the
original function call alone by declaring an initial `&whole foo' parameter
and then returning foo."
  (let ((p args) (res nil))
    (while (consp p) (push (pop p) res))
    (setq args (nconc (nreverse res) (and p (list '&rest p)))))
  (list 'eval-when '(compile load eval)
	(cl-transform-function-property
	 func 'cl-compiler-macro
	 (cons (if (memq '&whole args) (delq '&whole args)
		 (cons '--cl-whole-arg-- args)) body))
	(list 'or (list 'get (list 'quote func) '(quote byte-compile))
	      (list 'put (list 'quote func) '(quote byte-compile)
		    '(quote cl-byte-compile-compiler-macro)))))

(defun compiler-macroexpand (form)
  (while
      (let ((func (car-safe form)) (handler nil))
	(while (and (symbolp func)
		    (not (setq handler (get func 'cl-compiler-macro)))
		    (fboundp func)
		    (or (not (eq (car-safe (symbol-function func)) 'autoload))
			(load (nth 1 (symbol-function func)))))
	  (setq func (symbol-function func)))
	(and handler
	     (not (eq form (setq form (apply handler form (cdr form))))))))
  form)

(defun cl-byte-compile-compiler-macro (form)
  (if (eq form (setq form (compiler-macroexpand form)))
      (byte-compile-normal-call form)
    (byte-compile-form form)))

(defmacro defsubst* (name args &rest body)
  "Define NAME as a function.
Like `defun', except the function is automatically declared `inline',
ARGLIST allows full Common Lisp conventions, and BODY is implicitly
surrounded by (block NAME ...).

\(fn NAME ARGLIST [DOCSTRING] BODY...)"
  (let* ((argns (cl-arglist-args args)) (p argns)
	 (pbody (cons 'progn body))
	 (unsafe (not (cl-safe-expr-p pbody))))
    (while (and p (eq (cl-expr-contains args (car p)) 1)) (pop p))
    (list 'progn
	  (if p nil   ; give up if defaults refer to earlier args
	    (list 'define-compiler-macro name
		  (if (memq '&key args)
		      (list* '&whole 'cl-whole '&cl-quote args)
		    (cons '&cl-quote args))
		  (list* 'cl-defsubst-expand (list 'quote argns)
			 (list 'quote (list* 'block name body))
			 (not (or unsafe (cl-expr-access-order pbody argns)))
			 (and (memq '&key args) 'cl-whole) unsafe argns)))
	  (list* 'defun* name args body))))

(defun cl-defsubst-expand (argns body simple whole unsafe &rest argvs)
  (if (and whole (not (cl-safe-expr-p (cons 'progn argvs)))) whole
    (if (cl-simple-exprs-p argvs) (setq simple t))
    (let ((lets (delq nil
		      (mapcar* (function
				(lambda (argn argv)
				  (if (or simple (cl-const-expr-p argv))
				      (progn (setq body (subst argv argn body))
					     (and unsafe (list argn argv)))
				    (list argn argv))))
			       argns argvs))))
      (if lets (list 'let lets body) body))))


;;; Compile-time optimizations for some functions defined in this package.
;;; Note that cl.el arranges to force cl-macs to be loaded at compile-time,
;;; mainly to make sure these macros will be present.

(put 'eql 'byte-compile nil)
(define-compiler-macro eql (&whole form a b)
  (cond ((eq (cl-const-expr-p a) t)
	 (let ((val (cl-const-expr-val a)))
	   (if (and (numberp val) (not (integerp val)))
	       (list 'equal a b)
	     (list 'eq a b))))
	((eq (cl-const-expr-p b) t)
	 (let ((val (cl-const-expr-val b)))
	   (if (and (numberp val) (not (integerp val)))
	       (list 'equal a b)
	     (list 'eq a b))))
	((cl-simple-expr-p a 5)
	 (list 'if (list 'numberp a)
	       (list 'equal a b)
	       (list 'eq a b)))
	((and (cl-safe-expr-p a)
	      (cl-simple-expr-p b 5))
	 (list 'if (list 'numberp b)
	       (list 'equal a b)
	       (list 'eq a b)))
	(t form)))

(define-compiler-macro member* (&whole form a list &rest keys)
  (let ((test (and (= (length keys) 2) (eq (car keys) :test)
		   (cl-const-expr-val (nth 1 keys)))))
    (cond ((eq test 'eq) (list 'memq a list))
	  ((eq test 'equal) (list 'member a list))
	  ((or (null keys) (eq test 'eql)) (list 'memql a list))
	  (t form))))

(define-compiler-macro assoc* (&whole form a list &rest keys)
  (let ((test (and (= (length keys) 2) (eq (car keys) :test)
		   (cl-const-expr-val (nth 1 keys)))))
    (cond ((eq test 'eq) (list 'assq a list))
	  ((eq test 'equal) (list 'assoc a list))
	  ((and (eq (cl-const-expr-p a) t) (or (null keys) (eq test 'eql)))
	   (if (floatp-safe (cl-const-expr-val a))
	       (list 'assoc a list) (list 'assq a list)))
	  (t form))))

(define-compiler-macro adjoin (&whole form a list &rest keys)
  (if (and (cl-simple-expr-p a) (cl-simple-expr-p list)
	   (not (memq :key keys)))
      (list 'if (list* 'member* a list keys) list (list 'cons a list))
    form))

(define-compiler-macro list* (arg &rest others)
  (let* ((args (reverse (cons arg others)))
	 (form (car args)))
    (while (setq args (cdr args))
      (setq form (list 'cons (car args) form)))
    form))

(define-compiler-macro get* (sym prop &optional def)
  (if def
      (list 'getf (list 'symbol-plist sym) prop def)
    (list 'get sym prop)))

(define-compiler-macro typep (&whole form val type)
  (if (cl-const-expr-p type)
      (let ((res (cl-make-type-test val (cl-const-expr-val type))))
	(if (or (memq (cl-expr-contains res val) '(nil 1))
		(cl-simple-expr-p val)) res
	  (let ((temp (make-symbol "--cl-var--")))
	    (list 'let (list (list temp val)) (subst temp val res)))))
    form))


(mapc (lambda (y)
	(put (car y) 'side-effect-free t)
	(put (car y) 'byte-compile 'cl-byte-compile-compiler-macro)
	(put (car y) 'cl-compiler-macro
	     `(lambda (w x)
		,(if (symbolp (cadr y))
		     `(list ',(cadr y)
			    (list ',(caddr y) x))
		   (cons 'list (cdr y))))))
      '((first 'car x) (second 'cadr x) (third 'caddr x) (fourth 'cadddr x)
	(fifth 'nth 4 x) (sixth 'nth 5 x) (seventh 'nth 6 x)
	(eighth 'nth 7 x) (ninth 'nth 8 x) (tenth 'nth 9 x)
	(rest 'cdr x) (endp 'null x) (plusp '> x 0) (minusp '< x 0)
	(caaar car caar) (caadr car cadr) (cadar car cdar)
	(caddr car cddr) (cdaar cdr caar) (cdadr cdr cadr)
	(cddar cdr cdar) (cdddr cdr cddr) (caaaar car caaar)
	(caaadr car caadr) (caadar car cadar) (caaddr car caddr)
	(cadaar car cdaar) (cadadr car cdadr) (caddar car cddar)
	(cadddr car cdddr) (cdaaar cdr caaar) (cdaadr cdr caadr)
	(cdadar cdr cadar) (cdaddr cdr caddr) (cddaar cdr cdaar)
	(cddadr cdr cdadr) (cdddar cdr cddar) (cddddr cdr cdddr) ))

;;; Things that are inline.
(proclaim '(inline floatp-safe acons map concatenate notany notevery
		   cl-set-elt revappend nreconc gethash))

;;; Things that are side-effect-free.
(mapc (lambda (x) (put x 'side-effect-free t))
      '(oddp evenp signum last butlast ldiff pairlis gcd lcm
	isqrt floor* ceiling* truncate* round* mod* rem* subseq
	list-length get* getf))

;;; Things that are side-effect-and-error-free.
(mapc (lambda (x) (put x 'side-effect-free 'error-free))
      '(eql floatp-safe list* subst acons equalp random-state-p
	copy-tree sublis))


(run-hooks 'cl-macs-load-hook)

;;; Local variables:
;;; byte-compile-warnings: (redefine callargs free-vars unresolved obsolete noruntime)
;;; End:

;; arch-tag: afd947a6-b553-4df1-bba5-000be6388f46
;;; cl-macs.el ends here