summaryrefslogtreecommitdiffstats
path: root/src/ex_eval.c
blob: 68dc6d78ca6e917073abad074ff0c9cb490aa235 (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
/* vi:set ts=8 sts=4 sw=4 noet:
 *
 * VIM - Vi IMproved	by Bram Moolenaar
 *
 * Do ":help uganda"  in Vim to read copying and usage conditions.
 * Do ":help credits" in Vim to see a list of people who contributed.
 * See README.txt for an overview of the Vim source code.
 */

/*
 * ex_eval.c: functions for Ex command line for the +eval feature.
 */

#include "vim.h"

#if defined(FEAT_EVAL) || defined(PROTO)

static char	*get_end_emsg(cstack_T *cstack);

/*
 * Exception handling terms:
 *
 *	:try		":try" command		\
 *	    ...		try block		|
 *	:catch RE	":catch" command	|
 *	    ...		catch clause		|- try conditional
 *	:finally	":finally" command	|
 *	    ...		finally clause		|
 *	:endtry		":endtry" command	/
 *
 * The try conditional may have any number of catch clauses and at most one
 * finally clause.  A ":throw" command can be inside the try block, a catch
 * clause, the finally clause, or in a function called or script sourced from
 * there or even outside the try conditional.  Try conditionals may be nested.
 */

/*
 * Configuration whether an exception is thrown on error or interrupt.  When
 * the preprocessor macros below evaluate to FALSE, an error (did_emsg) or
 * interrupt (got_int) under an active try conditional terminates the script
 * after the non-active finally clauses of all active try conditionals have been
 * executed.  Otherwise, errors and/or interrupts are converted into catchable
 * exceptions (did_throw additionally set), which terminate the script only if
 * not caught.  For user exceptions, only did_throw is set.  (Note: got_int can
 * be set asynchronously afterwards by a SIGINT, so did_throw && got_int is not
 * a reliant test that the exception currently being thrown is an interrupt
 * exception.  Similarly, did_emsg can be set afterwards on an error in an
 * (unskipped) conditional command inside an inactive conditional, so did_throw
 * && did_emsg is not a reliant test that the exception currently being thrown
 * is an error exception.)  -  The macros can be defined as expressions checking
 * for a variable that is allowed to be changed during execution of a script.
 */
#if 0
// Expressions used for testing during the development phase.
# define THROW_ON_ERROR		(!eval_to_number("$VIMNOERRTHROW"))
# define THROW_ON_INTERRUPT	(!eval_to_number("$VIMNOINTTHROW"))
# define THROW_TEST
#else
// Values used for the Vim release.
# define THROW_ON_ERROR		TRUE
# define THROW_ON_ERROR_TRUE
# define THROW_ON_INTERRUPT	TRUE
# define THROW_ON_INTERRUPT_TRUE
#endif

/*
 * When several errors appear in a row, setting "force_abort" is delayed until
 * the failing command returned.  "cause_abort" is set to TRUE meanwhile, in
 * order to indicate that situation.  This is useful when "force_abort" was set
 * during execution of a function call from an expression: the aborting of the
 * expression evaluation is done without producing any error messages, but all
 * error messages on parsing errors during the expression evaluation are given
 * (even if a try conditional is active).
 */
static int cause_abort = FALSE;

/*
 * Return TRUE when immediately aborting on error, or when an interrupt
 * occurred or an exception was thrown but not caught.  Use for ":{range}call"
 * to check whether an aborted function that does not handle a range itself
 * should be called again for the next line in the range.  Also used for
 * cancelling expression evaluation after a function call caused an immediate
 * abort.  Note that the first emsg() call temporarily resets "force_abort"
 * until the throw point for error messages has been reached.  That is, during
 * cancellation of an expression evaluation after an aborting function call or
 * due to a parsing error, aborting() always returns the same value.
 * "got_int" is also set by calling interrupt().
 */
    int
aborting(void)
{
    return (did_emsg && force_abort) || got_int || did_throw;
}

/*
 * The value of "force_abort" is temporarily reset by the first emsg() call
 * during an expression evaluation, and "cause_abort" is used instead.  It might
 * be necessary to restore "force_abort" even before the throw point for the
 * error message has been reached.  update_force_abort() should be called then.
 */
    void
update_force_abort(void)
{
    if (cause_abort)
	force_abort = TRUE;
}

/*
 * Return TRUE if a command with a subcommand resulting in "retcode" should
 * abort the script processing.  Can be used to suppress an autocommand after
 * execution of a failing subcommand as long as the error message has not been
 * displayed and actually caused the abortion.
 */
    int
should_abort(int retcode)
{
    return ((retcode == FAIL && trylevel != 0 && !emsg_silent) || aborting());
}

/*
 * Return TRUE if a function with the "abort" flag should not be considered
 * ended on an error.  This means that parsing commands is continued in order
 * to find finally clauses to be executed, and that some errors in skipped
 * commands are still reported.
 */
    int
aborted_in_try(void)
{
    // This function is only called after an error.  In this case, "force_abort"
    // determines whether searching for finally clauses is necessary.
    return force_abort;
}

/*
 * cause_errthrow(): Cause a throw of an error exception if appropriate.
 * Return TRUE if the error message should not be displayed by emsg().
 * Sets "ignore", if the emsg() call should be ignored completely.
 *
 * When several messages appear in the same command, the first is usually the
 * most specific one and used as the exception value.  The "severe" flag can be
 * set to TRUE, if a later but severer message should be used instead.
 */
    int
cause_errthrow(
    char_u	*mesg,
    int		severe,
    int		*ignore)
{
    msglist_T	*elem;
    msglist_T	**plist;

    /*
     * Do nothing when displaying the interrupt message or reporting an
     * uncaught exception (which has already been discarded then) at the top
     * level.  Also when no exception can be thrown.  The message will be
     * displayed by emsg().
     */
    if (suppress_errthrow)
	return FALSE;

    /*
     * If emsg() has not been called previously, temporarily reset
     * "force_abort" until the throw point for error messages has been
     * reached.  This ensures that aborting() returns the same value for all
     * errors that appear in the same command.  This means particularly that
     * for parsing errors during expression evaluation emsg() will be called
     * multiply, even when the expression is evaluated from a finally clause
     * that was activated due to an aborting error, interrupt, or exception.
     */
    if (!did_emsg)
    {
	cause_abort = force_abort;
	force_abort = FALSE;
    }

    /*
     * If no try conditional is active and no exception is being thrown and
     * there has not been an error in a try conditional or a throw so far, do
     * nothing (for compatibility of non-EH scripts).  The message will then
     * be displayed by emsg().  When ":silent!" was used and we are not
     * currently throwing an exception, do nothing.  The message text will
     * then be stored to v:errmsg by emsg() without displaying it.
     */
    if (((trylevel == 0 && !cause_abort) || emsg_silent) && !did_throw)
	return FALSE;

    /*
     * Ignore an interrupt message when inside a try conditional or when an
     * exception is being thrown or when an error in a try conditional or
     * throw has been detected previously.  This is important in order that an
     * interrupt exception is catchable by the innermost try conditional and
     * not replaced by an interrupt message error exception.
     */
    if (mesg == (char_u *)_(e_interrupted))
    {
	*ignore = TRUE;
	return TRUE;
    }

    /*
     * Ensure that all commands in nested function calls and sourced files
     * are aborted immediately.
     */
    cause_abort = TRUE;

    /*
     * When an exception is being thrown, some commands (like conditionals) are
     * not skipped.  Errors in those commands may affect what of the subsequent
     * commands are regarded part of catch and finally clauses.  Catching the
     * exception would then cause execution of commands not intended by the
     * user, who wouldn't even get aware of the problem.  Therefore, discard the
     * exception currently being thrown to prevent it from being caught.  Just
     * execute finally clauses and terminate.
     */
    if (did_throw)
    {
	// When discarding an interrupt exception, reset got_int to prevent the
	// same interrupt being converted to an exception again and discarding
	// the error exception we are about to throw here.
	if (current_exception->type == ET_INTERRUPT)
	    got_int = FALSE;
	discard_current_exception();
    }

#ifdef THROW_TEST
    if (!THROW_ON_ERROR)
    {
	/*
	 * Print error message immediately without searching for a matching
	 * catch clause; just finally clauses are executed before the script
	 * is terminated.
	 */
	return FALSE;
    }
    else
#endif
    {
	/*
	 * Prepare the throw of an error exception, so that everything will
	 * be aborted (except for executing finally clauses), until the error
	 * exception is caught; if still uncaught at the top level, the error
	 * message will be displayed and the script processing terminated
	 * then.  -  This function has no access to the conditional stack.
	 * Thus, the actual throw is made after the failing command has
	 * returned.  -  Throw only the first of several errors in a row, except
	 * a severe error is following.
	 */
	if (msg_list != NULL)
	{
	    plist = msg_list;
	    while (*plist != NULL)
		plist = &(*plist)->next;

	    elem = ALLOC_CLEAR_ONE(msglist_T);
	    if (elem == NULL)
	    {
		suppress_errthrow = TRUE;
		emsg(_(e_out_of_memory));
	    }
	    else
	    {
		elem->msg = (char *)vim_strsave(mesg);
		if (elem->msg == NULL)
		{
		    vim_free(elem);
		    suppress_errthrow = TRUE;
		    emsg(_(e_out_of_memory));
		}
		else
		{
		    elem->next = NULL;
		    elem->throw_msg = NULL;
		    *plist = elem;
		    if (plist == msg_list || severe)
		    {
			char	    *tmsg;

			// Skip the extra "Vim " prefix for message "E458".
			tmsg = elem->msg;
			if (STRNCMP(tmsg, "Vim E", 5) == 0
				&& VIM_ISDIGIT(tmsg[5])
				&& VIM_ISDIGIT(tmsg[6])
				&& VIM_ISDIGIT(tmsg[7])
				&& tmsg[8] == ':'
				&& tmsg[9] == ' ')
			    (*msg_list)->throw_msg = &tmsg[4];
			else
			    (*msg_list)->throw_msg = tmsg;
		    }

		    // Get the source name and lnum now, it may change before
		    // reaching do_errthrow().
		    elem->sfile = estack_sfile(ESTACK_NONE);
		    elem->slnum = SOURCING_LNUM;
		    elem->msg_compiling = estack_compiling;
		}
	    }
	}
	return TRUE;
    }
}

/*
 * Free a "msg_list" and the messages it contains.
 */
    static void
free_msglist(msglist_T *l)
{
    msglist_T  *messages, *next;

    messages = l;
    while (messages != NULL)
    {
	next = messages->next;
	vim_free(messages->msg);
	vim_free(messages->sfile);
	vim_free(messages);
	messages = next;
    }
}

/*
 * Free global "*msg_list" and the messages it contains, then set "*msg_list"
 * to NULL.
 */
    void
free_global_msglist(void)
{
    free_msglist(*msg_list);
    *msg_list = NULL;
}

/*
 * Throw the message specified in the call to cause_errthrow() above as an
 * error exception.  If cstack is NULL, postpone the throw until do_cmdline()
 * has returned (see do_one_cmd()).
 */
    void
do_errthrow(cstack_T *cstack, char_u *cmdname)
{
    /*
     * Ensure that all commands in nested function calls and sourced files
     * are aborted immediately.
     */
    if (cause_abort)
    {
	cause_abort = FALSE;
	force_abort = TRUE;
    }

    // If no exception is to be thrown or the conversion should be done after
    // returning to a previous invocation of do_one_cmd(), do nothing.
    if (msg_list == NULL || *msg_list == NULL)
	return;

    if (throw_exception(*msg_list, ET_ERROR, cmdname) == FAIL)
	free_msglist(*msg_list);
    else
    {
	if (cstack != NULL)
	    do_throw(cstack);
	else
	    need_rethrow = TRUE;
    }
    *msg_list = NULL;
}

/*
 * do_intthrow(): Replace the current exception by an interrupt or interrupt
 * exception if appropriate.  Return TRUE if the current exception is discarded,
 * FALSE otherwise.
 */
    int
do_intthrow(cstack_T *cstack)
{
    /*
     * If no interrupt occurred or no try conditional is active and no exception
     * is being thrown, do nothing (for compatibility of non-EH scripts).
     */
    if (!got_int || (trylevel == 0 && !did_throw))
	return FALSE;

#ifdef THROW_TEST	// avoid warning for condition always true
    if (!THROW_ON_INTERRUPT)
    {
	/*
	 * The interrupt aborts everything except for executing finally clauses.
	 * Discard any user or error or interrupt exception currently being
	 * thrown.
	 */
	if (did_throw)
	    discard_current_exception();
    }
    else
#endif
    {
	/*
	 * Throw an interrupt exception, so that everything will be aborted
	 * (except for executing finally clauses), until the interrupt exception
	 * is caught; if still uncaught at the top level, the script processing
	 * will be terminated then.  -  If an interrupt exception is already
	 * being thrown, do nothing.
	 *
	 */
	if (did_throw)
	{
	    if (current_exception->type == ET_INTERRUPT)
		return FALSE;

	    // An interrupt exception replaces any user or error exception.
	    discard_current_exception();
	}
	if (throw_exception("Vim:Interrupt", ET_INTERRUPT, NULL) != FAIL)
	    do_throw(cstack);
    }

    return TRUE;
}

/*
 * Get an exception message that is to be stored in current_exception->value.
 */
    char *
get_exception_string(
    void	*value,
    except_type_T type,
    char_u	*cmdname,
    int		*should_free)
{
    char	*ret;
    char	*mesg;
    int		cmdlen;
    char	*p, *val;

    if (type == ET_ERROR)
    {
	*should_free = TRUE;
	mesg = ((msglist_T *)value)->throw_msg;
	if (cmdname != NULL && *cmdname != NUL)
	{
	    cmdlen = (int)STRLEN(cmdname);
	    ret = (char *)vim_strnsave((char_u *)"Vim(",
						4 + cmdlen + 2 + STRLEN(mesg));
	    if (ret == NULL)
		return ret;
	    STRCPY(&ret[4], cmdname);
	    STRCPY(&ret[4 + cmdlen], "):");
	    val = ret + 4 + cmdlen + 2;
	}
	else
	{
	    ret = (char *)vim_strnsave((char_u *)"Vim:", 4 + STRLEN(mesg));
	    if (ret == NULL)
		return ret;
	    val = ret + 4;
	}

	// msg_add_fname may have been used to prefix the message with a file
	// name in quotes.  In the exception value, put the file name in
	// parentheses and move it to the end.
	for (p = mesg; ; p++)
	{
	    if (*p == NUL
		    || (*p == 'E'
			&& VIM_ISDIGIT(p[1])
			&& (p[2] == ':'
			    || (VIM_ISDIGIT(p[2])
				&& (p[3] == ':'
				    || (VIM_ISDIGIT(p[3])
					&& p[4] == ':'))))))
	    {
		if (*p == NUL || p == mesg)
		    STRCAT(val, mesg);  // 'E123' missing or at beginning
		else
		{
		    // '"filename" E123: message text'
		    if (mesg[0] != '"' || p-2 < &mesg[1] ||
			    p[-2] != '"' || p[-1] != ' ')
			// "E123:" is part of the file name.
			continue;

		    STRCAT(val, p);
		    p[-2] = NUL;
		    sprintf((char *)(val + STRLEN(p)), " (%s)", &mesg[1]);
		    p[-2] = '"';
		}
		break;
	    }
	}
    }
    else
    {
	*should_free = FALSE;
	ret = value;
    }

    return ret;
}


/*
 * Throw a new exception.  Return FAIL when out of memory or it was tried to
 * throw an illegal user exception.  "value" is the exception string for a
 * user or interrupt exception, or points to a message list in case of an
 * error exception.
 */
    int
throw_exception(void *value, except_type_T type, char_u *cmdname)
{
    except_T	*excp;
    int		should_free;

    /*
     * Disallow faking Interrupt or error exceptions as user exceptions.  They
     * would be treated differently from real interrupt or error exceptions
     * when no active try block is found, see do_cmdline().
     */
    if (type == ET_USER)
    {
	if (STRNCMP((char_u *)value, "Vim", 3) == 0
		&& (((char_u *)value)[3] == NUL || ((char_u *)value)[3] == ':'
		    || ((char_u *)value)[3] == '('))
	{
	    emsg(_(e_cannot_throw_exceptions_with_vim_prefix));
	    goto fail;
	}
    }

    excp = ALLOC_ONE(except_T);
    if (excp == NULL)
	goto nomem;

    if (type == ET_ERROR)
	// Store the original message and prefix the exception value with
	// "Vim:" or, if a command name is given, "Vim(cmdname):".
	excp->messages = (msglist_T *)value;

    excp->value = get_exception_string(value, type, cmdname, &should_free);
    if (excp->value == NULL && should_free)
	goto nomem;

    excp->type = type;
    if (type == ET_ERROR && ((msglist_T *)value)->sfile != NULL)
    {
	msglist_T *entry = (msglist_T *)value;

	excp->throw_name = entry->sfile;
	entry->sfile = NULL;
	excp->throw_lnum = entry->slnum;
    }
    else
    {
	excp->throw_name = estack_sfile(ESTACK_NONE);
	if (excp->throw_name == NULL)
	    excp->throw_name = vim_strsave((char_u *)"");
	if (excp->throw_name == NULL)
	{
	    if (should_free)
		vim_free(excp->value);
	    goto nomem;
	}
	excp->throw_lnum = SOURCING_LNUM;
    }

    if (p_verbose >= 13 || debug_break_level > 0)
    {
	int	save_msg_silent = msg_silent;

	if (debug_break_level > 0)
	    msg_silent = FALSE;		// display messages
	else
	    verbose_enter();
	++no_wait_return;
	if (debug_break_level > 0 || *p_vfile == NUL)
	    msg_scroll = TRUE;	    // always scroll up, don't overwrite

	smsg(_("Exception thrown: %s"), excp->value);
	msg_puts("\n");   // don't overwrite this either

	if (debug_break_level > 0 || *p_vfile == NUL)
	    cmdline_row = msg_row;
	--no_wait_return;
	if (debug_break_level > 0)
	    msg_silent = save_msg_silent;
	else
	    verbose_leave();
    }

    current_exception = excp;
    return OK;

nomem:
    vim_free(excp);
    suppress_errthrow = TRUE;
    emsg(_(e_out_of_memory));
fail:
    current_exception = NULL;
    return FAIL;
}

/*
 * Discard an exception.  "was_finished" is set when the exception has been
 * caught and the catch clause has been ended normally.
 */
    static void
discard_exception(except_T *excp, int was_finished)
{
    char_u		*saved_IObuff;

    if (current_exception == excp)
	current_exception = NULL;
    if (excp == NULL)
    {
	internal_error("discard_exception()");
	return;
    }

    if (p_verbose >= 13 || debug_break_level > 0)
    {
	int	save_msg_silent = msg_silent;

	saved_IObuff = vim_strsave(IObuff);
	if (debug_break_level > 0)
	    msg_silent = FALSE;		// display messages
	else
	    verbose_enter();
	++no_wait_return;
	if (debug_break_level > 0 || *p_vfile == NUL)
	    msg_scroll = TRUE;	    // always scroll up, don't overwrite
	smsg(was_finished
		    ? _("Exception finished: %s")
		    : _("Exception discarded: %s"),
		excp->value);
	msg_puts("\n");   // don't overwrite this either
	if (debug_break_level > 0 || *p_vfile == NUL)
	    cmdline_row = msg_row;
	--no_wait_return;
	if (debug_break_level > 0)
	    msg_silent = save_msg_silent;
	else
	    verbose_leave();
	STRCPY(IObuff, saved_IObuff);
	vim_free(saved_IObuff);
    }
    if (excp->type != ET_INTERRUPT)
	vim_free(excp->value);
    if (excp->type == ET_ERROR)
	free_msglist(excp->messages);
    vim_free(excp->throw_name);
    vim_free(excp);
}

/*
 * Discard the exception currently being thrown.
 */
    void
discard_current_exception(void)
{
    if (current_exception != NULL)
	discard_exception(current_exception, FALSE);
    did_throw = FALSE;
    need_rethrow = FALSE;
}

/*
 * Put an exception on the caught stack.
 */
    void
catch_exception(except_T *excp)
{
    excp->caught = caught_stack;
    caught_stack = excp;
    set_vim_var_string(VV_EXCEPTION, (char_u *)excp->value, -1);
    if (*excp->throw_name != NUL)
    {
	if (excp->throw_lnum != 0)
	    vim_snprintf((char *)IObuff, IOSIZE, _("%s, line %ld"),
				    excp->throw_name, (long)excp->throw_lnum);
	else
	    vim_snprintf((char *)IObuff, IOSIZE, "%s", excp->throw_name);
	set_vim_var_string(VV_THROWPOINT, IObuff, -1);
    }
    else
	// throw_name not set on an exception from a command that was typed.
	set_vim_var_string(VV_THROWPOINT, NULL, -1);

    if (p_verbose >= 13 || debug_break_level > 0)
    {
	int	save_msg_silent = msg_silent;

	if (debug_break_level > 0)
	    msg_silent = FALSE;		// display messages
	else
	    verbose_enter();
	++no_wait_return;
	if (debug_break_level > 0 || *p_vfile == NUL)
	    msg_scroll = TRUE;	    // always scroll up, don't overwrite

	smsg(_("Exception caught: %s"), excp->value);
	msg_puts("\n");   // don't overwrite this either

	if (debug_break_level > 0 || *p_vfile == NUL)
	    cmdline_row = msg_row;
	--no_wait_return;
	if (debug_break_level > 0)
	    msg_silent = save_msg_silent;
	else
	    verbose_leave();
    }
}

/*
 * Remove an exception from the caught stack.
 */
    static void
finish_exception(except_T *excp)
{
    if (excp != caught_stack)
	internal_error("finish_exception()");
    caught_stack = caught_stack->caught;
    if (caught_stack != NULL)
    {
	set_vim_var_string(VV_EXCEPTION, (char_u *)caught_stack->value, -1);
	if (*caught_stack->throw_name != NUL)
	{
	    if (caught_stack->throw_lnum != 0)
		vim_snprintf((char *)IObuff, IOSIZE,
			_("%s, line %ld"), caught_stack->throw_name,
			(long)caught_stack->throw_lnum);
	    else
		vim_snprintf((char *)IObuff, IOSIZE, "%s",
						    caught_stack->throw_name);
	    set_vim_var_string(VV_THROWPOINT, IObuff, -1);
	}
	else
	    // throw_name not set on an exception from a command that was
	    // typed.
	    set_vim_var_string(VV_THROWPOINT, NULL, -1);
    }
    else
    {
	set_vim_var_string(VV_EXCEPTION, NULL, -1);
	set_vim_var_string(VV_THROWPOINT, NULL, -1);
    }

    // Discard the exception, but use the finish message for 'verbose'.
    discard_exception(excp, TRUE);
}

/*
 * Flags specifying the message displayed by report_pending.
 */
#define RP_MAKE		0
#define RP_RESUME	1
#define RP_DISCARD	2

/*
 * Report information about something pending in a finally clause if required by
 * the 'verbose' option or when debugging.  "action" tells whether something is
 * made pending or something pending is resumed or discarded.  "pending" tells
 * what is pending.  "value" specifies the return value for a pending ":return"
 * or the exception value for a pending exception.
 */
    static void
report_pending(int action, int pending, void *value)
{
    char	*mesg;
    char	*s;
    int		save_msg_silent;


    switch (action)
    {
	case RP_MAKE:
	    mesg = _("%s made pending");
	    break;
	case RP_RESUME:
	    mesg = _("%s resumed");
	    break;
	// case RP_DISCARD:
	default:
	    mesg = _("%s discarded");
	    break;
    }

    switch (pending)
    {
	case CSTP_NONE:
	    return;

	case CSTP_CONTINUE:
	    s = ":continue";
	    break;
	case CSTP_BREAK:
	    s = ":break";
	    break;
	case CSTP_FINISH:
	    s = ":finish";
	    break;
	case CSTP_RETURN:
	    // ":return" command producing value, allocated
	    s = (char *)get_return_cmd(value);
	    break;

	default:
	    if (pending & CSTP_THROW)
	    {
		vim_snprintf((char *)IObuff, IOSIZE, mesg, _("Exception"));
		mesg = (char *)vim_strnsave(IObuff, STRLEN(IObuff) + 4);
		STRCAT(mesg, ": %s");
		s = (char *)((except_T *)value)->value;
	    }
	    else if ((pending & CSTP_ERROR) && (pending & CSTP_INTERRUPT))
		s = _("Error and interrupt");
	    else if (pending & CSTP_ERROR)
		s = _("Error");
	    else // if (pending & CSTP_INTERRUPT)
		s = _("Interrupt");
    }

    save_msg_silent = msg_silent;
    if (debug_break_level > 0)
	msg_silent = FALSE;	// display messages
    ++no_wait_return;
    msg_scroll = TRUE;		// always scroll up, don't overwrite
    smsg(mesg, s);
    msg_puts("\n");   // don't overwrite this either
    cmdline_row = msg_row;
    --no_wait_return;
    if (debug_break_level > 0)
	msg_silent = save_msg_silent;

    if (pending == CSTP_RETURN)
	vim_free(s);
    else if (pending & CSTP_THROW)
	vim_free(mesg);
}

/*
 * If something is made pending in a finally clause, report it if required by
 * the 'verbose' option or when debugging.
 */
    void
report_make_pending(int pending, void *value)
{
    if (p_verbose >= 14 || debug_break_level > 0)
    {
	if (debug_break_level <= 0)
	    verbose_enter();
	report_pending(RP_MAKE, pending, value);
	if (debug_break_level <= 0)
	    verbose_leave();
    }
}

/*
 * If something pending in a finally clause is resumed at the ":endtry", report
 * it if required by the 'verbose' option or when debugging.
 */
    static void
report_resume_pending(int pending, void *value)
{
    if (p_verbose >= 14 || debug_break_level > 0)
    {
	if (debug_break_level <= 0)
	    verbose_enter();
	report_pending(RP_RESUME, pending, value);
	if (debug_break_level <= 0)
	    verbose_leave();
    }
}

/*
 * If something pending in a finally clause is discarded, report it if required
 * by the 'verbose' option or when debugging.
 */
    static void
report_discard_pending(int pending, void *value)
{
    if (p_verbose >= 14 || debug_break_level > 0)
    {
	if (debug_break_level <= 0)
	    verbose_enter();
	report_pending(RP_DISCARD, pending, value);
	if (debug_break_level <= 0)
	    verbose_leave();
    }
}

/*
 * Return TRUE if "arg" is only a variable, register, environment variable,
 * option name or string.
 */
    int
cmd_is_name_only(char_u *arg)
{
    char_u  *p = arg;
    char_u  *alias = NULL;
    int	    name_only = FALSE;

    if (*p == '@')
    {
	++p;
	if (*p != NUL)
	    ++p;
    }
    else if (*p == '\'' || *p == '"')
    {
	int	    r;

	if (*p == '"')
	    r = eval_string(&p, NULL, FALSE, FALSE);
	else
	    r = eval_lit_string(&p, NULL, FALSE, FALSE);
	if (r == FAIL)
	    return FALSE;
    }
    else
    {
	if (*p == '&')
	{
	    ++p;
	    if (STRNCMP("l:", p, 2) == 0 || STRNCMP("g:", p, 2) == 0)
		p += 2;
	}
	else if (*p == '$')
	    ++p;
	(void)get_name_len(&p, &alias, FALSE, FALSE);
    }
    name_only = ends_excmd2(arg, skipwhite(p));
    vim_free(alias);
    return name_only;
}

/*
 * ":eval".
 */
    void
ex_eval(exarg_T *eap)
{
    typval_T	tv;
    evalarg_T	evalarg;
    int		name_only = FALSE;
    long	lnum = SOURCING_LNUM;

    if (in_vim9script())
	name_only = cmd_is_name_only(eap->arg);

    fill_evalarg_from_eap(&evalarg, eap, eap->skip);

    if (eval0(eap->arg, &tv, eap, &evalarg) == OK)
    {
	clear_tv(&tv);
	if (in_vim9script() && name_only
		&& (evalarg.eval_tofree == NULL
		    || ends_excmd2(evalarg.eval_tofree,
					      skipwhite(evalarg.eval_tofree))))
	{
	    SOURCING_LNUM = lnum;
	    semsg(_(e_expression_without_effect_str), eap->arg);
	}
    }

    clear_evalarg(&evalarg, eap);
}

/*
 * Start a new scope/block.  Caller should have checked that cs_idx is not
 * exceeding CSTACK_LEN.
 */
    static void
enter_block(cstack_T *cstack)
{
    ++cstack->cs_idx;
    if (in_vim9script() && current_sctx.sc_sid > 0)
    {
	scriptitem_T *si = SCRIPT_ITEM(current_sctx.sc_sid);

	cstack->cs_script_var_len[cstack->cs_idx] = si->sn_var_vals.ga_len;
	cstack->cs_block_id[cstack->cs_idx] = ++si->sn_last_block_id;
	si->sn_current_block_id = si->sn_last_block_id;
    }
    else
    {
	// Just in case in_vim9script() does not return the same value when the
	// block ends.
	cstack->cs_script_var_len[cstack->cs_idx] = 0;
	cstack->cs_block_id[cstack->cs_idx] = 0;
    }
}

    static void
leave_block(cstack_T *cstack)
{
    if (in_vim9script() && SCRIPT_ID_VALID(current_sctx.sc_sid))
    {
	scriptitem_T	*si = SCRIPT_ITEM(current_sctx.sc_sid);
	int		i;
	int		func_defined =
			       cstack->cs_flags[cstack->cs_idx] & CSF_FUNC_DEF;

	for (i = cstack->cs_script_var_len[cstack->cs_idx];
					       i < si->sn_var_vals.ga_len; ++i)
	{
	    svar_T	*sv = ((svar_T *)si->sn_var_vals.ga_data) + i;

	    // sv_name is set to NULL if it was already removed.  This happens
	    // when it was defined in an inner block and no functions were
	    // defined there.
	    if (sv->sv_name != NULL)
		// Remove a variable declared inside the block, if it still
		// exists, from sn_vars and move the value into sn_all_vars
		// if "func_defined" is non-zero.
		hide_script_var(si, i, func_defined);
	}

	if (cstack->cs_idx == 0)
	    si->sn_current_block_id = 0;
	else
	    si->sn_current_block_id = cstack->cs_block_id[cstack->cs_idx - 1];
    }
    --cstack->cs_idx;
}

/*
 * ":if".
 */
    void
ex_if(exarg_T *eap)
{
    int		error;
    int		skip;
    int		result;
    cstack_T	*cstack = eap->cstack;

    if (cstack->cs_idx == CSTACK_LEN - 1)
	eap->errmsg = _(e_if_nesting_too_deep);
    else
    {
	enter_block(cstack);
	cstack->cs_flags[cstack->cs_idx] = 0;

	/*
	 * Don't do something after an error, interrupt, or throw, or when
	 * there is a surrounding conditional and it was not active.
	 */
	skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0
		&& !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE));

	result = eval_to_bool(eap->arg, &error, eap, skip, FALSE);

	if (!skip && !error)
	{
	    if (result)
		cstack->cs_flags[cstack->cs_idx] = CSF_ACTIVE | CSF_TRUE;
	}
	else
	    // set TRUE, so this conditional will never get active
	    cstack->cs_flags[cstack->cs_idx] = CSF_TRUE;
    }
}

/*
 * ":endif".
 */
    void
ex_endif(exarg_T *eap)
{
    cstack_T	*cstack = eap->cstack;

    if (cmdmod_error(FALSE))
	return;
    did_endif = TRUE;
    if (cstack->cs_idx < 0
	    || (cstack->cs_flags[cstack->cs_idx]
				& (CSF_WHILE | CSF_FOR | CSF_TRY | CSF_BLOCK)))
	eap->errmsg = _(e_endif_without_if);
    else
    {
	/*
	 * When debugging or a breakpoint was encountered, display the debug
	 * prompt (if not already done).  This shows the user that an ":endif"
	 * is executed when the ":if" or a previous ":elseif" was not TRUE.
	 * Handle a ">quit" debug command as if an interrupt had occurred before
	 * the ":endif".  That is, throw an interrupt exception if appropriate.
	 * Doing this here prevents an exception for a parsing error being
	 * discarded by throwing the interrupt exception later on.
	 */
	if (!(cstack->cs_flags[cstack->cs_idx] & CSF_TRUE)
						    && dbg_check_skipped(eap))
	    (void)do_intthrow(cstack);

	leave_block(cstack);
    }
}

/*
 * ":else" and ":elseif".
 */
    void
ex_else(exarg_T *eap)
{
    int		error;
    int		skip;
    int		result;
    cstack_T	*cstack = eap->cstack;

    /*
     * Don't do something after an error, interrupt, or throw, or when there is
     * a surrounding conditional and it was not active.
     */
    skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0
	    && !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE));

    if (cstack->cs_idx < 0
	    || (cstack->cs_flags[cstack->cs_idx]
				& (CSF_WHILE | CSF_FOR | CSF_TRY | CSF_BLOCK)))
    {
	if (eap->cmdidx == CMD_else)
	{
	    eap->errmsg = _(e_else_without_if);
	    return;
	}
	eap->errmsg = _(e_elseif_without_if);
	skip = TRUE;
    }
    else if (cstack->cs_flags[cstack->cs_idx] & CSF_ELSE)
    {
	if (eap->cmdidx == CMD_else)
	{
	    eap->errmsg = _(e_multiple_else);
	    return;
	}
	eap->errmsg = _(e_elseif_after_else);
	skip = TRUE;
    }

    if (cstack->cs_idx >= 0)
    {
	// Variables declared in the previous block can no longer be
	// used.  Needs to be done before setting "cs_flags".
	leave_block(cstack);
	enter_block(cstack);
    }

    // if skipping or the ":if" was TRUE, reset ACTIVE, otherwise set it
    if (skip || cstack->cs_flags[cstack->cs_idx] & CSF_TRUE)
    {
	if (eap->errmsg == NULL)
	    cstack->cs_flags[cstack->cs_idx] = CSF_TRUE;
	skip = TRUE;	// don't evaluate an ":elseif"
    }
    else
	cstack->cs_flags[cstack->cs_idx] = CSF_ACTIVE;

    /*
     * When debugging or a breakpoint was encountered, display the debug prompt
     * (if not already done).  This shows the user that an ":else" or ":elseif"
     * is executed when the ":if" or previous ":elseif" was not TRUE.  Handle
     * a ">quit" debug command as if an interrupt had occurred before the
     * ":else" or ":elseif".  That is, set "skip" and throw an interrupt
     * exception if appropriate.  Doing this here prevents that an exception
     * for a parsing errors is discarded when throwing the interrupt exception
     * later on.
     */
    if (!skip && dbg_check_skipped(eap) && got_int)
    {
	(void)do_intthrow(cstack);
	skip = TRUE;
    }

    if (eap->cmdidx == CMD_elseif)
    {
	// When skipping we ignore most errors, but a missing expression is
	// wrong, perhaps it should have been "else".
	// A double quote here is the start of a string, not a comment.
	if (skip && *eap->arg != '"' && ends_excmd(*eap->arg))
	    semsg(_(e_invalid_expression_str), eap->arg);
	else
	    result = eval_to_bool(eap->arg, &error, eap, skip, FALSE);

	// When throwing error exceptions, we want to throw always the first
	// of several errors in a row.  This is what actually happens when
	// a conditional error was detected above and there is another failure
	// when parsing the expression.  Since the skip flag is set in this
	// case, the parsing error will be ignored by emsg().
	if (!skip && !error)
	{
	    if (result)
		cstack->cs_flags[cstack->cs_idx] = CSF_ACTIVE | CSF_TRUE;
	    else
		cstack->cs_flags[cstack->cs_idx] = 0;
	}
	else if (eap->errmsg == NULL)
	    // set TRUE, so this conditional will never get active
	    cstack->cs_flags[cstack->cs_idx] = CSF_TRUE;
    }
    else
	cstack->cs_flags[cstack->cs_idx] |= CSF_ELSE;
}

/*
 * Handle ":while" and ":for".
 */
    void
ex_while(exarg_T *eap)
{
    int		error;
    int		skip;
    int		result;
    cstack_T	*cstack = eap->cstack;
    int		prev_cs_flags = 0;

    if (cstack->cs_idx == CSTACK_LEN - 1)
	eap->errmsg = _(e_while_for_nesting_too_deep);
    else
    {
	/*
	 * The loop flag is set when we have jumped back from the matching
	 * ":endwhile" or ":endfor".  When not set, need to initialise this
	 * cstack entry.
	 */
	if ((cstack->cs_lflags & CSL_HAD_LOOP) == 0)
	{
	    enter_block(cstack);
	    ++cstack->cs_looplevel;
	    cstack->cs_line[cstack->cs_idx] = -1;
	}
	else
	{
	    if (in_vim9script() && SCRIPT_ID_VALID(current_sctx.sc_sid))
	    {
		scriptitem_T	*si = SCRIPT_ITEM(current_sctx.sc_sid);
		int		i;
		int		first;
		int		func_defined = cstack->cs_flags[cstack->cs_idx]
								& CSF_FUNC_DEF;

		// Any variables defined in the previous round are no longer
		// visible.  Keep the first one for ":for", it is the loop
		// variable that we reuse every time around.
		// Do this backwards, so that vars defined in a later round are
		// found first.
		first = cstack->cs_script_var_len[cstack->cs_idx];
		if (eap->cmdidx == CMD_for)
		{
		    forinfo_T	*fi = cstack->cs_forinfo[cstack->cs_idx];

		    first += fi == NULL || fi->fi_varcount == 0
							 ? 1 : fi->fi_varcount;
		}
		for (i = si->sn_var_vals.ga_len - 1; i >= first; --i)
		{
		    svar_T	*sv = ((svar_T *)si->sn_var_vals.ga_data) + i;

		    // sv_name is set to NULL if it was already removed.  This
		    // happens when it was defined in an inner block and no
		    // functions were defined there.
		    if (sv->sv_name != NULL)
			// Remove a variable declared inside the block, if it
			// still exists, from sn_vars.
			hide_script_var(si, i, func_defined);
		}

		// Start a new block ID, so that variables defined inside the
		// loop are created new and not shared with the previous loop.
		// Matters when used in a closure.
		cstack->cs_block_id[cstack->cs_idx] = ++si->sn_last_block_id;
		si->sn_current_block_id = si->sn_last_block_id;
	    }
	}
	prev_cs_flags = cstack->cs_flags[cstack->cs_idx];
	cstack->cs_flags[cstack->cs_idx] =
			       eap->cmdidx == CMD_while ? CSF_WHILE : CSF_FOR;

	/*
	 * Don't do something after an error, interrupt, or throw, or when
	 * there is a surrounding conditional and it was not active.
	 */
	skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0
		&& !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE));
	if (eap->cmdidx == CMD_while)
	{
	    /*
	     * ":while bool-expr"
	     */
	    result = eval_to_bool(eap->arg, &error, eap, skip, FALSE);
	}
	else
	{
	    forinfo_T	*fi;
	    evalarg_T	evalarg;

	    /*
	     * ":for var in list-expr"
	     */
	    fill_evalarg_from_eap(&evalarg, eap, skip);
	    if ((cstack->cs_lflags & CSL_HAD_LOOP) != 0)
	    {
		// Jumping here from a ":continue" or ":endfor": use the
		// previously evaluated list.
		fi = cstack->cs_forinfo[cstack->cs_idx];
		error = FALSE;

		// the "in expr" is not used, skip over it
		skip_for_lines(fi, &evalarg);
	    }
	    else
	    {
		long save_lnum = SOURCING_LNUM;

		// Evaluate the argument and get the info in a structure.
		fi = eval_for_line(eap->arg, &error, eap, &evalarg);
		cstack->cs_forinfo[cstack->cs_idx] = fi;

		// Errors should use the first line number.
		SOURCING_LNUM = save_lnum;
	    }

	    // use the element at the start of the list and advance
	    if (!error && fi != NULL && !skip)
		result = next_for_item(fi, eap->arg);
	    else
		result = FALSE;
	    if (fi != NULL)
		// OR all the cs_flags together, if a function was defined in
		// any round then the loop variable may have been used.
		fi->fi_cs_flags |= prev_cs_flags;

	    if (!result)
	    {
		// If a function was defined in any round then set the
		// CSF_FUNC_DEF flag now, so that it's seen by leave_block().
		if (fi != NULL && (fi->fi_cs_flags & CSF_FUNC_DEF))
		    cstack->cs_flags[cstack->cs_idx] |= CSF_FUNC_DEF;

		free_for_info(fi);
		cstack->cs_forinfo[cstack->cs_idx] = NULL;
	    }
	    clear_evalarg(&evalarg, eap);
	}

	/*
	 * If this cstack entry was just initialised and is active, set the
	 * loop flag, so do_cmdline() will set the line number in cs_line[].
	 * If executing the command a second time, clear the loop flag.
	 */
	if (!skip && !error && result)
	{
	    cstack->cs_flags[cstack->cs_idx] |= (CSF_ACTIVE | CSF_TRUE);
	    cstack->cs_lflags ^= CSL_HAD_LOOP;
	}
	else
	{
	    cstack->cs_lflags &= ~CSL_HAD_LOOP;
	    // If the ":while" evaluates to FALSE or ":for" is past the end of
	    // the list, show the debug prompt at the ":endwhile"/":endfor" as
	    // if there was a ":break" in a ":while"/":for" evaluating to
	    // TRUE.
	    if (!skip && !error)
		cstack->cs_flags[cstack->cs_idx] |= CSF_TRUE;
	}
    }
}

/*
 * ":continue"
 */
    void
ex_continue(exarg_T *eap)
{
    int		idx;
    cstack_T	*cstack = eap->cstack;

    if (cstack->cs_looplevel <= 0 || cstack->cs_idx < 0)
	eap->errmsg = _(e_continue_without_while_or_for);
    else
    {
	// Try to find the matching ":while".  This might stop at a try
	// conditional not in its finally clause (which is then to be executed
	// next).  Therefore, inactivate all conditionals except the ":while"
	// itself (if reached).
	idx = cleanup_conditionals(cstack, CSF_WHILE | CSF_FOR, FALSE);
	if (idx >= 0 && (cstack->cs_flags[idx] & (CSF_WHILE | CSF_FOR)))
	{
	    rewind_conditionals(cstack, idx, CSF_TRY, &cstack->cs_trylevel);

	    /*
	     * Set CSL_HAD_CONT, so do_cmdline() will jump back to the
	     * matching ":while".
	     */
	    cstack->cs_lflags |= CSL_HAD_CONT;	// let do_cmdline() handle it
	}
	else
	{
	    // If a try conditional not in its finally clause is reached first,
	    // make the ":continue" pending for execution at the ":endtry".
	    cstack->cs_pending[idx] = CSTP_CONTINUE;
	    report_make_pending(CSTP_CONTINUE, NULL);
	}
    }
}

/*
 * ":break"
 */
    void
ex_break(exarg_T *eap)
{
    int		idx;
    cstack_T	*cstack = eap->cstack;

    if (cstack->cs_looplevel <= 0 || cstack->cs_idx < 0)
	eap->errmsg = _(e_break_without_while_or_for);
    else
    {
	// Inactivate conditionals until the matching ":while" or a try
	// conditional not in its finally clause (which is then to be
	// executed next) is found.  In the latter case, make the ":break"
	// pending for execution at the ":endtry".
	idx = cleanup_conditionals(cstack, CSF_WHILE | CSF_FOR, TRUE);
	if (idx >= 0 && !(cstack->cs_flags[idx] & (CSF_WHILE | CSF_FOR)))
	{
	    cstack->cs_pending[idx] = CSTP_BREAK;
	    report_make_pending(CSTP_BREAK, NULL);
	}
    }
}

/*
 * ":endwhile" and ":endfor"
 */
    void
ex_endwhile(exarg_T *eap)
{
    cstack_T	*cstack = eap->cstack;
    int		idx;
    char	*err;
    int		csf;
    int		fl;

    if (cmdmod_error(TRUE))
	return;

    if (eap->cmdidx == CMD_endwhile)
    {
	err = e_endwhile_without_while;
	csf = CSF_WHILE;
    }
    else
    {
	err = e_endfor_without_for;
	csf = CSF_FOR;
    }

    if (cstack->cs_looplevel <= 0 || cstack->cs_idx < 0)
	eap->errmsg = _(err);
    else
    {
	fl = cstack->cs_flags[cstack->cs_idx];
	if (!(fl & csf))
	{
	    // If we are in a ":while" or ":for" but used the wrong endloop
	    // command, do not rewind to the next enclosing ":for"/":while".
	    if (fl & CSF_WHILE)
		eap->errmsg = _(e_using_endfor_with_while);
	    else if (fl & CSF_FOR)
		eap->errmsg = _(e_using_endwhile_with_for);
	}
	if (!(fl & (CSF_WHILE | CSF_FOR)))
	{
	    if (!(fl & CSF_TRY))
		eap->errmsg = _(e_missing_endif);
	    else if (fl & CSF_FINALLY)
		eap->errmsg = _(e_missing_endtry);
	    // Try to find the matching ":while" and report what's missing.
	    for (idx = cstack->cs_idx; idx > 0; --idx)
	    {
		fl =  cstack->cs_flags[idx];
		if ((fl & CSF_TRY) && !(fl & CSF_FINALLY))
		{
		    // Give up at a try conditional not in its finally clause.
		    // Ignore the ":endwhile"/":endfor".
		    eap->errmsg = _(err);
		    return;
		}
		if (fl & csf)
		    break;
	    }
	    // Cleanup and rewind all contained (and unclosed) conditionals.
	    (void)cleanup_conditionals(cstack, CSF_WHILE | CSF_FOR, FALSE);
	    rewind_conditionals(cstack, idx, CSF_TRY, &cstack->cs_trylevel);
	}

	/*
	 * When debugging or a breakpoint was encountered, display the debug
	 * prompt (if not already done).  This shows the user that an
	 * ":endwhile"/":endfor" is executed when the ":while" was not TRUE or
	 * after a ":break".  Handle a ">quit" debug command as if an
	 * interrupt had occurred before the ":endwhile"/":endfor".  That is,
	 * throw an interrupt exception if appropriate.  Doing this here
	 * prevents that an exception for a parsing error is discarded when
	 * throwing the interrupt exception later on.
	 */
	else if (cstack->cs_flags[cstack->cs_idx] & CSF_TRUE
		&& !(cstack->cs_flags[cstack->cs_idx] & CSF_ACTIVE)
		&& dbg_check_skipped(eap))
	    (void)do_intthrow(cstack);

	// Set loop flag, so do_cmdline() will jump back to the matching
	// ":while" or ":for".
	cstack->cs_lflags |= CSL_HAD_ENDLOOP;
    }
}

/*
 * "{" start of a block in Vim9 script
 */
    void
ex_block(exarg_T *eap)
{
    cstack_T	*cstack = eap->cstack;

    if (cstack->cs_idx == CSTACK_LEN - 1)
	eap->errmsg = _(e_block_nesting_too_deep);
    else
    {
	enter_block(cstack);
	cstack->cs_flags[cstack->cs_idx] = CSF_BLOCK | CSF_ACTIVE | CSF_TRUE;
    }
}

/*
 * "}" end of a block in Vim9 script
 */
    void
ex_endblock(exarg_T *eap)
{
    cstack_T	*cstack = eap->cstack;

    if (cstack->cs_idx < 0
	    || (cstack->cs_flags[cstack->cs_idx] & CSF_BLOCK) == 0)
	eap->errmsg = _(e_endblock_without_block);
    else
	leave_block(cstack);
}

    int
inside_block(exarg_T *eap)
{
    cstack_T	*cstack = eap->cstack;
    int		i;

    for (i = 0; i <= cstack->cs_idx; ++i)
	if (cstack->cs_flags[cstack->cs_idx] & CSF_BLOCK)
	    return TRUE;
    return FALSE;
}

/*
 * ":throw expr"
 */
    void
ex_throw(exarg_T *eap)
{
    char_u	*arg = eap->arg;
    char_u	*value;

    if (*arg != NUL && *arg != '|' && *arg != '\n')
	value = eval_to_string_skip(arg, eap, eap->skip);
    else
    {
	emsg(_(e_argument_required));
	value = NULL;
    }

    // On error or when an exception is thrown during argument evaluation, do
    // not throw.
    if (!eap->skip && value != NULL)
    {
	if (throw_exception(value, ET_USER, NULL) == FAIL)
	    vim_free(value);
	else
	    do_throw(eap->cstack);
    }
}

/*
 * Throw the current exception through the specified cstack.  Common routine
 * for ":throw" (user exception) and error and interrupt exceptions.  Also
 * used for rethrowing an uncaught exception.
 */
    void
do_throw(cstack_T *cstack)
{
    int		idx;
    int		inactivate_try = FALSE;

    /*
     * Cleanup and inactivate up to the next surrounding try conditional that
     * is not in its finally clause.  Normally, do not inactivate the try
     * conditional itself, so that its ACTIVE flag can be tested below.  But
     * if a previous error or interrupt has not been converted to an exception,
     * inactivate the try conditional, too, as if the conversion had been done,
     * and reset the did_emsg or got_int flag, so this won't happen again at
     * the next surrounding try conditional.
     */
#ifndef THROW_ON_ERROR_TRUE
    if (did_emsg && !THROW_ON_ERROR)
    {
	inactivate_try = TRUE;
	did_emsg = FALSE;
    }
#endif
#ifndef THROW_ON_INTERRUPT_TRUE
    if (got_int && !THROW_ON_INTERRUPT)
    {
	inactivate_try = TRUE;
	got_int = FALSE;
    }
#endif
    idx = cleanup_conditionals(cstack, 0, inactivate_try);
    if (idx >= 0)
    {
	/*
	 * If this try conditional is active and we are before its first
	 * ":catch", set THROWN so that the ":catch" commands will check
	 * whether the exception matches.  When the exception came from any of
	 * the catch clauses, it will be made pending at the ":finally" (if
	 * present) and rethrown at the ":endtry".  This will also happen if
	 * the try conditional is inactive.  This is the case when we are
	 * throwing an exception due to an error or interrupt on the way from
	 * a preceding ":continue", ":break", ":return", ":finish", error or
	 * interrupt (not converted to an exception) to the finally clause or
	 * from a preceding throw of a user or error or interrupt exception to
	 * the matching catch clause or the finally clause.
	 */
	if (!(cstack->cs_flags[idx] & CSF_CAUGHT))
	{
	    if (cstack->cs_flags[idx] & CSF_ACTIVE)
		cstack->cs_flags[idx] |= CSF_THROWN;
	    else
		// THROWN may have already been set for a catchable exception
		// that has been discarded.  Ensure it is reset for the new
		// exception.
		cstack->cs_flags[idx] &= ~CSF_THROWN;
	}
	cstack->cs_flags[idx] &= ~CSF_ACTIVE;
	cstack->cs_exception[idx] = current_exception;
    }
#if 0
    // TODO: Add optimization below.  Not yet done because of interface
    // problems to eval.c and ex_cmds2.c. (Servatius)
    else
    {
	/*
	 * There are no catch clauses to check or finally clauses to execute.
	 * End the current script or function.  The exception will be rethrown
	 * in the caller.
	 */
	if (getline_equal(eap->getline, eap->cookie, get_func_line))
	    current_funccal->returned = TRUE;
	elseif (eap->get_func_line == getsourceline)
	    ((struct source_cookie *)eap->cookie)->finished = TRUE;
    }
#endif

    did_throw = TRUE;
}

/*
 * ":try"
 */
    void
ex_try(exarg_T *eap)
{
    int		skip;
    cstack_T	*cstack = eap->cstack;

    if (cmdmod_error(FALSE))
	return;

    if (cstack->cs_idx == CSTACK_LEN - 1)
	eap->errmsg = _(e_try_nesting_too_deep);
    else
    {
	enter_block(cstack);
	++cstack->cs_trylevel;
	cstack->cs_flags[cstack->cs_idx] = CSF_TRY;
	cstack->cs_pending[cstack->cs_idx] = CSTP_NONE;

	/*
	 * Don't do something after an error, interrupt, or throw, or when there
	 * is a surrounding conditional and it was not active.
	 */
	skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0
		&& !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE));

	if (!skip)
	{
	    // Set ACTIVE and TRUE.  TRUE means that the corresponding ":catch"
	    // commands should check for a match if an exception is thrown and
	    // that the finally clause needs to be executed.
	    cstack->cs_flags[cstack->cs_idx] |= CSF_ACTIVE | CSF_TRUE;

	    /*
	     * ":silent!", even when used in a try conditional, disables
	     * displaying of error messages and conversion of errors to
	     * exceptions.  When the silent commands again open a try
	     * conditional, save "emsg_silent" and reset it so that errors are
	     * again converted to exceptions.  The value is restored when that
	     * try conditional is left.  If it is left normally, the commands
	     * following the ":endtry" are again silent.  If it is left by
	     * a ":continue", ":break", ":return", or ":finish", the commands
	     * executed next are again silent.  If it is left due to an
	     * aborting error, an interrupt, or an exception, restoring
	     * "emsg_silent" does not matter since we are already in the
	     * aborting state and/or the exception has already been thrown.
	     * The effect is then just freeing the memory that was allocated
	     * to save the value.
	     */
	    if (emsg_silent)
	    {
		eslist_T	*elem;

		elem = ALLOC_ONE(struct eslist_elem);
		if (elem == NULL)
		    emsg(_(e_out_of_memory));
		else
		{
		    elem->saved_emsg_silent = emsg_silent;
		    elem->next = cstack->cs_emsg_silent_list;
		    cstack->cs_emsg_silent_list = elem;
		    cstack->cs_flags[cstack->cs_idx] |= CSF_SILENT;
		    emsg_silent = 0;
		}
	    }
	}

    }
}

/*
 * ":catch /{pattern}/" and ":catch"
 */
    void
ex_catch(exarg_T *eap)
{
    int		idx = 0;
    int		give_up = FALSE;
    int		skip = FALSE;
    int		caught = FALSE;
    char_u	*end;
    int		save_char = 0;
    char_u	*save_cpo;
    regmatch_T	regmatch;
    int		prev_got_int;
    cstack_T	*cstack = eap->cstack;
    char_u	*pat;

    if (cmdmod_error(FALSE))
	return;

    if (cstack->cs_trylevel <= 0 || cstack->cs_idx < 0)
    {
	eap->errmsg = _(e_catch_without_try);
	give_up = TRUE;
    }
    else
    {
	if (!(cstack->cs_flags[cstack->cs_idx] & CSF_TRY))
	{
	    // Report what's missing if the matching ":try" is not in its
	    // finally clause.
	    eap->errmsg = get_end_emsg(cstack);
	    skip = TRUE;
	}
	for (idx = cstack->cs_idx; idx > 0; --idx)
	    if (cstack->cs_flags[idx] & CSF_TRY)
		break;
	if (cstack->cs_flags[idx] & CSF_TRY)
	    cstack->cs_flags[idx] |= CSF_CATCH;
	if (cstack->cs_flags[idx] & CSF_FINALLY)
	{
	    // Give up for a ":catch" after ":finally" and ignore it.
	    // Just parse.
	    eap->errmsg = _(e_catch_after_finally);
	    give_up = TRUE;
	}
	else
	    rewind_conditionals(cstack, idx, CSF_WHILE | CSF_FOR,
						       &cstack->cs_looplevel);
    }

    if (ends_excmd2(eap->cmd, eap->arg))   // no argument, catch all errors
    {
	pat = (char_u *)".*";
	end = NULL;
	eap->nextcmd = find_nextcmd(eap->arg);
    }
    else
    {
	pat = eap->arg + 1;
	end = skip_regexp_err(pat, *eap->arg, TRUE);
	if (end == NULL)
	    give_up = TRUE;
    }

    if (!give_up)
    {
	/*
	 * Don't do something when no exception has been thrown or when the
	 * corresponding try block never got active (because of an inactive
	 * surrounding conditional or after an error or interrupt or throw).
	 */
	if (!did_throw || !(cstack->cs_flags[idx] & CSF_TRUE))
	    skip = TRUE;

	/*
	 * Check for a match only if an exception is thrown but not caught by
	 * a previous ":catch".  An exception that has replaced a discarded
	 * exception is not checked (THROWN is not set then).
	 */
	if (!skip && (cstack->cs_flags[idx] & CSF_THROWN)
		&& !(cstack->cs_flags[idx] & CSF_CAUGHT))
	{
	    if (end != NULL && *end != NUL
				      && !ends_excmd2(end, skipwhite(end + 1)))
	    {
		semsg(_(e_trailing_characters_str), end);
		return;
	    }

	    // When debugging or a breakpoint was encountered, display the
	    // debug prompt (if not already done) before checking for a match.
	    // This is a helpful hint for the user when the regular expression
	    // matching fails.  Handle a ">quit" debug command as if an
	    // interrupt had occurred before the ":catch".  That is, discard
	    // the original exception, replace it by an interrupt exception,
	    // and don't catch it in this try block.
	    if (!dbg_check_skipped(eap) || !do_intthrow(cstack))
	    {
		// Terminate the pattern and avoid the 'l' flag in 'cpoptions'
		// while compiling it.
		if (end != NULL)
		{
		    save_char = *end;
		    *end = NUL;
		}
		save_cpo  = p_cpo;
		p_cpo = empty_option;
		// Disable error messages, it will make current_exception
		// invalid.
		++emsg_off;
		regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
		--emsg_off;
		regmatch.rm_ic = FALSE;
		if (end != NULL)
		    *end = save_char;
		p_cpo = save_cpo;
		if (regmatch.regprog == NULL)
		    semsg(_(e_invalid_argument_str), pat);
		else
		{
		    /*
		     * Save the value of got_int and reset it.  We don't want
		     * a previous interruption cancel matching, only hitting
		     * CTRL-C while matching should abort it.
		     */
		    prev_got_int = got_int;
		    got_int = FALSE;
		    caught = vim_regexec_nl(&regmatch,
			       (char_u *)current_exception->value, (colnr_T)0);
		    got_int |= prev_got_int;
		    vim_regfree(regmatch.regprog);
		}
	    }
	}

	if (caught)
	{
	    // Make this ":catch" clause active and reset did_emsg, got_int,
	    // and did_throw.  Put the exception on the caught stack.
	    cstack->cs_flags[idx] |= CSF_ACTIVE | CSF_CAUGHT;
	    did_emsg = got_int = did_throw = FALSE;
	    catch_exception((except_T *)cstack->cs_exception[idx]);

	    if (cstack->cs_idx >= 0
			       && (cstack->cs_flags[cstack->cs_idx] & CSF_TRY))
	    {
		// Variables declared in the previous block can no longer be
		// used.
		leave_block(cstack);
		enter_block(cstack);
	    }

	    // It's mandatory that the current exception is stored in the cstack
	    // so that it can be discarded at the next ":catch", ":finally", or
	    // ":endtry" or when the catch clause is left by a ":continue",
	    // ":break", ":return", ":finish", error, interrupt, or another
	    // exception.
	    if (cstack->cs_exception[cstack->cs_idx] != current_exception)
		internal_error("ex_catch()");
	}
	else
	{
	    /*
	     * If there is a preceding catch clause and it caught the exception,
	     * finish the exception now.  This happens also after errors except
	     * when this ":catch" was after the ":finally" or not within
	     * a ":try".  Make the try conditional inactive so that the
	     * following catch clauses are skipped.  On an error or interrupt
	     * after the preceding try block or catch clause was left by
	     * a ":continue", ":break", ":return", or ":finish", discard the
	     * pending action.
	     */
	    cleanup_conditionals(cstack, CSF_TRY, TRUE);
	}
    }

    if (end != NULL)
	eap->nextcmd = find_nextcmd(end);
}

/*
 * ":finally"
 */
    void
ex_finally(exarg_T *eap)
{
    int		idx;
    int		skip = FALSE;
    int		pending = CSTP_NONE;
    cstack_T	*cstack = eap->cstack;

    if (cmdmod_error(FALSE))
	return;

    for (idx = cstack->cs_idx; idx >= 0; --idx)
	if (cstack->cs_flags[idx] & CSF_TRY)
	    break;
    if (cstack->cs_trylevel <= 0 || idx < 0)
    {
	eap->errmsg = _(e_finally_without_try);
	return;
    }

    if (!(cstack->cs_flags[cstack->cs_idx] & CSF_TRY))
    {
	eap->errmsg = get_end_emsg(cstack);
	// Make this error pending, so that the commands in the following
	// finally clause can be executed.  This overrules also a pending
	// ":continue", ":break", ":return", or ":finish".
	pending = CSTP_ERROR;
    }

    if (cstack->cs_flags[idx] & CSF_FINALLY)
    {
	// Give up for a multiple ":finally" and ignore it.
	eap->errmsg = _(e_multiple_finally);
	return;
    }
    rewind_conditionals(cstack, idx, CSF_WHILE | CSF_FOR,
						   &cstack->cs_looplevel);

    /*
     * Don't do something when the corresponding try block never got active
     * (because of an inactive surrounding conditional or after an error or
     * interrupt or throw) or for a ":finally" without ":try" or a multiple
     * ":finally".  After every other error (did_emsg or the conditional
     * errors detected above) or after an interrupt (got_int) or an
     * exception (did_throw), the finally clause must be executed.
     */
    skip = !(cstack->cs_flags[cstack->cs_idx] & CSF_TRUE);

    if (!skip)
    {
	// When debugging or a breakpoint was encountered, display the
	// debug prompt (if not already done).  The user then knows that the
	// finally clause is executed.
	if (dbg_check_skipped(eap))
	{
	    // Handle a ">quit" debug command as if an interrupt had
	    // occurred before the ":finally".  That is, discard the
	    // original exception and replace it by an interrupt
	    // exception.
	    (void)do_intthrow(cstack);
	}

	/*
	 * If there is a preceding catch clause and it caught the exception,
	 * finish the exception now.  This happens also after errors except
	 * when this is a multiple ":finally" or one not within a ":try".
	 * After an error or interrupt, this also discards a pending
	 * ":continue", ":break", ":finish", or ":return" from the preceding
	 * try block or catch clause.
	 */
	cleanup_conditionals(cstack, CSF_TRY, FALSE);

	if (cstack->cs_idx >= 0
			   && (cstack->cs_flags[cstack->cs_idx] & CSF_TRY))
	{
	    // Variables declared in the previous block can no longer be
	    // used.
	    leave_block(cstack);
	    enter_block(cstack);
	}

	/*
	 * Make did_emsg, got_int, did_throw pending.  If set, they overrule
	 * a pending ":continue", ":break", ":return", or ":finish".  Then
	 * we have particularly to discard a pending return value (as done
	 * by the call to cleanup_conditionals() above when did_emsg or
	 * got_int is set).  The pending values are restored by the
	 * ":endtry", except if there is a new error, interrupt, exception,
	 * ":continue", ":break", ":return", or ":finish" in the following
	 * finally clause.  A missing ":endwhile", ":endfor" or ":endif"
	 * detected here is treated as if did_emsg and did_throw had
	 * already been set, respectively in case that the error is not
	 * converted to an exception, did_throw had already been unset.
	 * We must not set did_emsg here since that would suppress the
	 * error message.
	 */
	if (pending == CSTP_ERROR || did_emsg || got_int || did_throw)
	{
	    if (cstack->cs_pending[cstack->cs_idx] == CSTP_RETURN)
	    {
		report_discard_pending(CSTP_RETURN,
				       cstack->cs_rettv[cstack->cs_idx]);
		discard_pending_return(cstack->cs_rettv[cstack->cs_idx]);
	    }
	    if (pending == CSTP_ERROR && !did_emsg)
		pending |= (THROW_ON_ERROR) ? CSTP_THROW : 0;
	    else
		pending |= did_throw ? CSTP_THROW : 0;
	    pending |= did_emsg  ? CSTP_ERROR     : 0;
	    pending |= got_int   ? CSTP_INTERRUPT : 0;
	    cstack->cs_pending[cstack->cs_idx] = pending;

	    // It's mandatory that the current exception is stored in the
	    // cstack so that it can be rethrown at the ":endtry" or be
	    // discarded if the finally clause is left by a ":continue",
	    // ":break", ":return", ":finish", error, interrupt, or another
	    // exception.  When emsg() is called for a missing ":endif" or
	    // a missing ":endwhile"/":endfor" detected here, the
	    // exception will be discarded.
	    if (did_throw && cstack->cs_exception[cstack->cs_idx]
						     != current_exception)
		internal_error("ex_finally()");
	}

	/*
	 * Set CSL_HAD_FINA, so do_cmdline() will reset did_emsg,
	 * got_int, and did_throw and make the finally clause active.
	 * This will happen after emsg() has been called for a missing
	 * ":endif" or a missing ":endwhile"/":endfor" detected here, so
	 * that the following finally clause will be executed even then.
	 */
	cstack->cs_lflags |= CSL_HAD_FINA;
    }
}

/*
 * ":endtry"
 */
    void
ex_endtry(exarg_T *eap)
{
    int		idx;
    int		skip;
    int		rethrow = FALSE;
    int		pending = CSTP_NONE;
    void	*rettv = NULL;
    cstack_T	*cstack = eap->cstack;

    if (cmdmod_error(FALSE))
	return;

    for (idx = cstack->cs_idx; idx >= 0; --idx)
	if (cstack->cs_flags[idx] & CSF_TRY)
	    break;
    if (cstack->cs_trylevel <= 0 || idx < 0)
    {
	eap->errmsg = _(e_endtry_without_try);
	return;
    }

    /*
     * Don't do something after an error, interrupt or throw in the try
     * block, catch clause, or finally clause preceding this ":endtry" or
     * when an error or interrupt occurred after a ":continue", ":break",
     * ":return", or ":finish" in a try block or catch clause preceding this
     * ":endtry" or when the try block never got active (because of an
     * inactive surrounding conditional or after an error or interrupt or
     * throw) or when there is a surrounding conditional and it has been
     * made inactive by a ":continue", ":break", ":return", or ":finish" in
     * the finally clause.  The latter case need not be tested since then
     * anything pending has already been discarded. */
    skip = did_emsg || got_int || did_throw
			     || !(cstack->cs_flags[cstack->cs_idx] & CSF_TRUE);

    if (!(cstack->cs_flags[cstack->cs_idx] & CSF_TRY))
    {
	eap->errmsg = get_end_emsg(cstack);

	// Find the matching ":try" and report what's missing.
	rewind_conditionals(cstack, idx, CSF_WHILE | CSF_FOR,
							&cstack->cs_looplevel);
	skip = TRUE;

	/*
	 * If an exception is being thrown, discard it to prevent it from
	 * being rethrown at the end of this function.  It would be
	 * discarded by the error message, anyway.  Resets did_throw.
	 * This does not affect the script termination due to the error
	 * since "trylevel" is decremented after emsg() has been called.
	 */
	if (did_throw)
	    discard_current_exception();

	// report eap->errmsg, also when there already was an error
	did_emsg = FALSE;
    }
    else
    {
	idx = cstack->cs_idx;

	// Check the flags only when not in a skipped block.
	if (!skip && in_vim9script()
		     && (cstack->cs_flags[idx] & (CSF_CATCH|CSF_FINALLY)) == 0)
	{
	    // try/endtry without any catch or finally: give an error and
	    // continue.
	    eap->errmsg = _(e_missing_catch_or_finally);
	}

	/*
	 * If we stopped with the exception currently being thrown at this
	 * try conditional since we didn't know that it doesn't have
	 * a finally clause, we need to rethrow it after closing the try
	 * conditional.
	 */
	if (did_throw && (cstack->cs_flags[idx] & CSF_TRUE)
		&& !(cstack->cs_flags[idx] & CSF_FINALLY))
	    rethrow = TRUE;
    }

    // If there was no finally clause, show the user when debugging or
    // a breakpoint was encountered that the end of the try conditional has
    // been reached: display the debug prompt (if not already done).  Do
    // this on normal control flow or when an exception was thrown, but not
    // on an interrupt or error not converted to an exception or when
    // a ":break", ":continue", ":return", or ":finish" is pending.  These
    // actions are carried out immediately.
    if ((rethrow || (!skip && !(cstack->cs_flags[idx] & CSF_FINALLY)
		    && !cstack->cs_pending[idx]))
	    && dbg_check_skipped(eap))
    {
	// Handle a ">quit" debug command as if an interrupt had occurred
	// before the ":endtry".  That is, throw an interrupt exception and
	// set "skip" and "rethrow".
	if (got_int)
	{
	    skip = TRUE;
	    (void)do_intthrow(cstack);
	    // The do_intthrow() call may have reset did_throw or
	    // cstack->cs_pending[idx].
	    rethrow = FALSE;
	    if (did_throw && !(cstack->cs_flags[idx] & CSF_FINALLY))
		rethrow = TRUE;
	}
    }

    /*
     * If a ":return" is pending, we need to resume it after closing the
     * try conditional; remember the return value.  If there was a finally
     * clause making an exception pending, we need to rethrow it.  Make it
     * the exception currently being thrown.
     */
    if (!skip)
    {
	pending = cstack->cs_pending[idx];
	cstack->cs_pending[idx] = CSTP_NONE;
	if (pending == CSTP_RETURN)
	    rettv = cstack->cs_rettv[idx];
	else if (pending & CSTP_THROW)
	    current_exception = cstack->cs_exception[idx];
    }

    /*
     * Discard anything pending on an error, interrupt, or throw in the
     * finally clause.  If there was no ":finally", discard a pending
     * ":continue", ":break", ":return", or ":finish" if an error or
     * interrupt occurred afterwards, but before the ":endtry" was reached.
     * If an exception was caught by the last of the catch clauses and there
     * was no finally clause, finish the exception now.  This happens also
     * after errors except when this ":endtry" is not within a ":try".
     * Restore "emsg_silent" if it has been reset by this try conditional.
     */
    (void)cleanup_conditionals(cstack, CSF_TRY | CSF_SILENT, TRUE);

    if (cstack->cs_idx >= 0 && (cstack->cs_flags[cstack->cs_idx] & CSF_TRY))
	leave_block(cstack);
    --cstack->cs_trylevel;

    if (!skip)
    {
	report_resume_pending(pending,
		    (pending == CSTP_RETURN) ? rettv :
		    (pending & CSTP_THROW) ? (void *)current_exception : NULL);
	switch (pending)
	{
	    case CSTP_NONE:
		break;

	    // Reactivate a pending ":continue", ":break", ":return",
	    // ":finish" from the try block or a catch clause of this try
	    // conditional.  This is skipped, if there was an error in an
	    // (unskipped) conditional command or an interrupt afterwards
	    // or if the finally clause is present and executed a new error,
	    // interrupt, throw, ":continue", ":break", ":return", or
	    // ":finish".
	    case CSTP_CONTINUE:
		ex_continue(eap);
		break;
	    case CSTP_BREAK:
		ex_break(eap);
		break;
	    case CSTP_RETURN:
		do_return(eap, FALSE, FALSE, rettv);
		break;
	    case CSTP_FINISH:
		do_finish(eap, FALSE);
		break;

	    // When the finally clause was entered due to an error,
	    // interrupt or throw (as opposed to a ":continue", ":break",
	    // ":return", or ":finish"), restore the pending values of
	    // did_emsg, got_int, and did_throw.  This is skipped, if there
	    // was a new error, interrupt, throw, ":continue", ":break",
	    // ":return", or ":finish".  in the finally clause.
	    default:
		if (pending & CSTP_ERROR)
		    did_emsg = TRUE;
		if (pending & CSTP_INTERRUPT)
		    got_int = TRUE;
		if (pending & CSTP_THROW)
		    rethrow = TRUE;
		break;
	}
    }

    if (rethrow)
	// Rethrow the current exception (within this cstack).
	do_throw(cstack);
}

/*
 * enter_cleanup() and leave_cleanup()
 *
 * Functions to be called before/after invoking a sequence of autocommands for
 * cleanup for a failed command.  (Failure means here that a call to emsg()
 * has been made, an interrupt occurred, or there is an uncaught exception
 * from a previous autocommand execution of the same command.)
 *
 * Call enter_cleanup() with a pointer to a cleanup_T and pass the same
 * pointer to leave_cleanup().  The cleanup_T structure stores the pending
 * error/interrupt/exception state.
 */

/*
 * This function works a bit like ex_finally() except that there was not
 * actually an extra try block around the part that failed and an error or
 * interrupt has not (yet) been converted to an exception.  This function
 * saves the error/interrupt/ exception state and prepares for the call to
 * do_cmdline() that is going to be made for the cleanup autocommand
 * execution.
 */
    void
enter_cleanup(cleanup_T *csp)
{
    int		pending = CSTP_NONE;

    /*
     * Postpone did_emsg, got_int, did_throw.  The pending values will be
     * restored by leave_cleanup() except if there was an aborting error,
     * interrupt, or uncaught exception after this function ends.
     */
    if (did_emsg || got_int || did_throw || need_rethrow)
    {
	csp->pending = (did_emsg     ? CSTP_ERROR     : 0)
		     | (got_int      ? CSTP_INTERRUPT : 0)
		     | (did_throw    ? CSTP_THROW     : 0)
		     | (need_rethrow ? CSTP_THROW     : 0);

	// If we are currently throwing an exception (did_throw), save it as
	// well.  On an error not yet converted to an exception, update
	// "force_abort" and reset "cause_abort" (as do_errthrow() would do).
	// This is needed for the do_cmdline() call that is going to be made
	// for autocommand execution.  We need not save *msg_list because
	// there is an extra instance for every call of do_cmdline(), anyway.
	if (did_throw || need_rethrow)
	{
	    csp->exception = current_exception;
	    current_exception = NULL;
	}
	else
	{
	    csp->exception = NULL;
	    if (did_emsg)
	    {
		force_abort |= cause_abort;
		cause_abort = FALSE;
	    }
	}
	did_emsg = got_int = did_throw = need_rethrow = FALSE;

	// Report if required by the 'verbose' option or when debugging.
	report_make_pending(pending, csp->exception);
    }
    else
    {
	csp->pending = CSTP_NONE;
	csp->exception = NULL;
    }
}

/*
 * See comment above enter_cleanup() for how this function is used.
 *
 * This function is a bit like ex_endtry() except that there was not actually
 * an extra try block around the part that failed and an error or interrupt
 * had not (yet) been converted to an exception when the cleanup autocommand
 * sequence was invoked.
 *
 * This function has to be called with the address of the cleanup_T structure
 * filled by enter_cleanup() as an argument; it restores the error/interrupt/
 * exception state saved by that function - except there was an aborting
 * error, an interrupt or an uncaught exception during execution of the
 * cleanup autocommands.  In the latter case, the saved error/interrupt/
 * exception state is discarded.
 */
    void
leave_cleanup(cleanup_T *csp)
{
    int		pending = csp->pending;

    if (pending == CSTP_NONE)	// nothing to do
	return;

    // If there was an aborting error, an interrupt, or an uncaught exception
    // after the corresponding call to enter_cleanup(), discard what has been
    // made pending by it.  Report this to the user if required by the
    // 'verbose' option or when debugging.
    if (aborting() || need_rethrow)
    {
	if (pending & CSTP_THROW)
	    // Cancel the pending exception (includes report).
	    discard_exception(csp->exception, FALSE);
	else
	    report_discard_pending(pending, NULL);

	// If an error was about to be converted to an exception when
	// enter_cleanup() was called, free the message list.
	if (msg_list != NULL)
	    free_global_msglist();
    }

    /*
     * If there was no new error, interrupt, or throw between the calls
     * to enter_cleanup() and leave_cleanup(), restore the pending
     * error/interrupt/exception state.
     */
    else
    {
	/*
	 * If there was an exception being thrown when enter_cleanup() was
	 * called, we need to rethrow it.  Make it the exception currently
	 * being thrown.
	 */
	if (pending & CSTP_THROW)
	    current_exception = csp->exception;

	/*
	 * If an error was about to be converted to an exception when
	 * enter_cleanup() was called, let "cause_abort" take the part of
	 * "force_abort" (as done by cause_errthrow()).
	 */
	else if (pending & CSTP_ERROR)
	{
	    cause_abort = force_abort;
	    force_abort = FALSE;
	}

	/*
	 * Restore the pending values of did_emsg, got_int, and did_throw.
	 */
	if (pending & CSTP_ERROR)
	    did_emsg = TRUE;
	if (pending & CSTP_INTERRUPT)
	    got_int = TRUE;
	if (pending & CSTP_THROW)
	    need_rethrow = TRUE;    // did_throw will be set by do_one_cmd()

	// Report if required by the 'verbose' option or when debugging.
	report_resume_pending(pending,
		   (pending & CSTP_THROW) ? (void *)current_exception : NULL);
    }
}


/*
 * Make conditionals inactive and discard what's pending in finally clauses
 * until the conditional type searched for or a try conditional not in its
 * finally clause is reached.  If this is in an active catch clause, finish
 * the caught exception.
 * Return the cstack index where the search stopped.
 * Values used for "searched_cond" are (CSF_WHILE | CSF_FOR) or CSF_TRY or 0,
 * the latter meaning the innermost try conditional not in its finally clause.
 * "inclusive" tells whether the conditional searched for should be made
 * inactive itself (a try conditional not in its finally clause possibly find
 * before is always made inactive).  If "inclusive" is TRUE and
 * "searched_cond" is CSF_TRY|CSF_SILENT, the saved former value of
 * "emsg_silent", if reset when the try conditional finally reached was
 * entered, is restored (used by ex_endtry()).  This is normally done only
 * when such a try conditional is left.
 */
    int
cleanup_conditionals(
    cstack_T   *cstack,
    int		searched_cond,
    int		inclusive)
{
    int		idx;
    int		stop = FALSE;

    for (idx = cstack->cs_idx; idx >= 0; --idx)
    {
	if (cstack->cs_flags[idx] & CSF_TRY)
	{
	    /*
	     * Discard anything pending in a finally clause and continue the
	     * search.  There may also be a pending ":continue", ":break",
	     * ":return", or ":finish" before the finally clause.  We must not
	     * discard it, unless an error or interrupt occurred afterwards.
	     */
	    if (did_emsg || got_int || (cstack->cs_flags[idx] & CSF_FINALLY))
	    {
		switch (cstack->cs_pending[idx])
		{
		    case CSTP_NONE:
			break;

		    case CSTP_CONTINUE:
		    case CSTP_BREAK:
		    case CSTP_FINISH:
			report_discard_pending(cstack->cs_pending[idx], NULL);
			cstack->cs_pending[idx] = CSTP_NONE;
			break;

		    case CSTP_RETURN:
			report_discard_pending(CSTP_RETURN,
						      cstack->cs_rettv[idx]);
			discard_pending_return(cstack->cs_rettv[idx]);
			cstack->cs_pending[idx] = CSTP_NONE;
			break;

		    default:
			if (cstack->cs_flags[idx] & CSF_FINALLY)
			{
			    if ((cstack->cs_pending[idx] & CSTP_THROW)
				    && cstack->cs_exception[idx] != NULL)
			    {
				// Cancel the pending exception.  This is in the
				// finally clause, so that the stack of the
				// caught exceptions is not involved.
				discard_exception(
					(except_T *)cstack->cs_exception[idx],
					FALSE);
			    }
			    else
				report_discard_pending(cstack->cs_pending[idx],
					NULL);
			    cstack->cs_pending[idx] = CSTP_NONE;
			}
			break;
		}
	    }

	    /*
	     * Stop at a try conditional not in its finally clause.  If this try
	     * conditional is in an active catch clause, finish the caught
	     * exception.
	     */
	    if (!(cstack->cs_flags[idx] & CSF_FINALLY))
	    {
		if ((cstack->cs_flags[idx] & CSF_ACTIVE)
			&& (cstack->cs_flags[idx] & CSF_CAUGHT)
			&& !(cstack->cs_flags[idx] & CSF_FINISHED))
		{
		    finish_exception((except_T *)cstack->cs_exception[idx]);
		    cstack->cs_flags[idx] |= CSF_FINISHED;
		}
		// Stop at this try conditional - except the try block never
		// got active (because of an inactive surrounding conditional
		// or when the ":try" appeared after an error or interrupt or
		// throw).
		if (cstack->cs_flags[idx] & CSF_TRUE)
		{
		    if (searched_cond == 0 && !inclusive)
			break;
		    stop = TRUE;
		}
	    }
	}

	// Stop on the searched conditional type (even when the surrounding
	// conditional is not active or something has been made pending).
	// If "inclusive" is TRUE and "searched_cond" is CSF_TRY|CSF_SILENT,
	// check first whether "emsg_silent" needs to be restored.
	if (cstack->cs_flags[idx] & searched_cond)
	{
	    if (!inclusive)
		break;
	    stop = TRUE;
	}
	cstack->cs_flags[idx] &= ~CSF_ACTIVE;
	if (stop && searched_cond != (CSF_TRY | CSF_SILENT))
	    break;

	/*
	 * When leaving a try conditional that reset "emsg_silent" on its
	 * entry after saving the original value, restore that value here and
	 * free the memory used to store it.
	 */
	if ((cstack->cs_flags[idx] & CSF_TRY)
		&& (cstack->cs_flags[idx] & CSF_SILENT))
	{
	    eslist_T	*elem;

	    elem = cstack->cs_emsg_silent_list;
	    cstack->cs_emsg_silent_list = elem->next;
	    emsg_silent = elem->saved_emsg_silent;
	    vim_free(elem);
	    cstack->cs_flags[idx] &= ~CSF_SILENT;
	}
	if (stop)
	    break;
    }
    return idx;
}

/*
 * Return an appropriate error message for a missing endwhile/endfor/endif.
 */
   static char *
get_end_emsg(cstack_T *cstack)
{
    if (cstack->cs_flags[cstack->cs_idx] & CSF_WHILE)
	return _(e_missing_endwhile);
    if (cstack->cs_flags[cstack->cs_idx] & CSF_FOR)
	return _(e_missing_endfor);
    return _(e_missing_endif);
}


/*
 * Rewind conditionals until index "idx" is reached.  "cond_type" and
 * "cond_level" specify a conditional type and the address of a level variable
 * which is to be decremented with each skipped conditional of the specified
 * type.
 * Also free "for info" structures where needed.
 */
    void
rewind_conditionals(
    cstack_T   *cstack,
    int		idx,
    int		cond_type,
    int		*cond_level)
{
    while (cstack->cs_idx > idx)
    {
	if (cstack->cs_flags[cstack->cs_idx] & cond_type)
	    --*cond_level;
	if (cstack->cs_flags[cstack->cs_idx] & CSF_FOR)
	    free_for_info(cstack->cs_forinfo[cstack->cs_idx]);
	leave_block(cstack);
    }
}

/*
 * ":endfunction" or ":enddef" when not after a ":function"
 */
    void
ex_endfunction(exarg_T *eap)
{
    if (eap->cmdidx == CMD_enddef)
	semsg(_(e_str_not_inside_function), ":enddef");
    else
	semsg(_(e_str_not_inside_function), ":endfunction");
}

/*
 * Return TRUE if the string "p" looks like a ":while" or ":for" command.
 */
    int
has_loop_cmd(char_u *p)
{
    int		len;

    // skip modifiers, white space and ':'
    for (;;)
    {
	while (*p == ' ' || *p == '\t' || *p == ':')
	    ++p;
	len = modifier_len(p);
	if (len == 0)
	    break;
	p += len;
    }
    if ((p[0] == 'w' && p[1] == 'h')
	    || (p[0] == 'f' && p[1] == 'o' && p[2] == 'r'))
	return TRUE;
    return FALSE;
}

#endif // FEAT_EVAL