unofficial mirror of bug-gnu-emacs@gnu.org 
 help / color / mirror / code / Atom feed
blob ac1c421e37a07fc9026c629ace8fabf461a62cb9 107572 bytes (raw)
name: lisp/progmodes/cc-defs.el 	 # note: path name is non-authoritative(*)

   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
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
 
;;; cc-defs.el --- compile time definitions for CC Mode

;; Copyright (C) 1985, 1987, 1992-2020 Free Software Foundation, Inc.

;; Authors:    2003- Alan Mackenzie
;;             1998- Martin Stjernholm
;;             1992-1999 Barry A. Warsaw
;;             1987 Dave Detlefs
;;             1987 Stewart Clamen
;;             1985 Richard M. Stallman
;; Maintainer: bug-cc-mode@gnu.org
;; Created:    22-Apr-1997 (split from cc-mode.el)
;; Keywords:   c languages
;; Package:    cc-mode

;; 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 of the License, 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.  If not, see <https://www.gnu.org/licenses/>.

;;; Commentary:

;; This file contains macros, defsubsts, and various other things that
;; must be loaded early both during compilation and at runtime.

;;; Code:

(eval-when-compile
  (let ((load-path
	 (if (and (boundp 'byte-compile-dest-file)
		  (stringp byte-compile-dest-file))
	     (cons (file-name-directory byte-compile-dest-file) load-path)
	   load-path)))
    (load "cc-bytecomp" nil t)))

(eval-and-compile
  (defvar c--cl-library
    (if (locate-library "cl-lib")
	'cl-lib
      'cl)))

(cc-external-require c--cl-library)
; was (cc-external-require 'cl).  ACM 2005/11/29.
; Changed from (eval-when-compile (require 'cl)) back to
; cc-external-require, 2015-08-12.
(cc-external-require 'regexp-opt)

;; Silence the compiler.
(cc-bytecomp-defvar c-enable-xemacs-performance-kludge-p) ; In cc-vars.el
(cc-bytecomp-defun region-active-p)	; XEmacs
(cc-bytecomp-defvar mark-active)	; Emacs
(cc-bytecomp-defvar deactivate-mark)	; Emacs
(cc-bytecomp-defvar inhibit-point-motion-hooks) ; Emacs
(cc-bytecomp-defvar parse-sexp-lookup-properties) ; Emacs
(cc-bytecomp-defvar text-property-default-nonsticky) ; Emacs 21
(cc-bytecomp-defun string-to-syntax)	; Emacs 21

\f
;; cc-fix.el contains compatibility macros that should be used if
;; needed.
(cc-conditional-require
 'cc-fix (or (/= (regexp-opt-depth "\\(\\(\\)\\)") 2)
	     (not (fboundp 'push))
	     ;; XEmacs 21.4 doesn't have `delete-dups'.
	     (not (fboundp 'delete-dups))))

(cc-conditional-require-after-load
 'cc-fix "font-lock"
 (and
  (featurep 'xemacs)
  (progn
    (require 'font-lock)
    (let (font-lock-keywords)
      (font-lock-compile-keywords (list regexp-unmatchable))
      font-lock-keywords))))

\f
;;; Variables also used at compile time.

(defconst c-version "5.34.2"
  "CC Mode version number.")

(defconst c-version-sym (intern c-version))
;; A little more compact and faster in comparisons.

(defvar c-buffer-is-cc-mode nil
  "Non-nil for all buffers with a major mode derived from CC Mode.
Otherwise, this variable is nil.  I.e. this variable is non-nil
for `c-mode', `c++-mode', `objc-mode', `csharp-mode',
`java-mode', `idl-mode', `pike-mode', `awk-mode', and any other
non-CC Mode mode that calls `c-initialize-cc-mode'.  The value is
the mode symbol itself \(i.e. `c-mode' etc) of the original CC
Mode mode, or just t if it's not known.")
(make-variable-buffer-local 'c-buffer-is-cc-mode)

;; Have to make `c-buffer-is-cc-mode' permanently local so that it
;; survives the initialization of the derived mode.
(put 'c-buffer-is-cc-mode 'permanent-local t)

(defvar c-syntax-table-hwm most-positive-fixnum)
;; A workaround for `syntax-ppss''s failure to take account of changes in
;; syntax-table text properties.  This variable gets set to the lowest
;; position where the syntax-table text property is changed, and that value
;; gets supplied to `syntax-ppss-flush-cache' just before a font locking is
;; due to take place.

\f
;; The following is used below during compilation.
(eval-and-compile
  (defvar c-inside-eval-when-compile nil)

  (defmacro cc-eval-when-compile (&rest body)
    "Like `progn', but evaluates the body at compile time.
The result of the body appears to the compiler as a quoted constant.

This variant works around bugs in `eval-when-compile' in various
\(X)Emacs versions.  See cc-defs.el for details."

    (if c-inside-eval-when-compile
	;; XEmacs 21.4.6 has a bug in `eval-when-compile' in that it
	;; evaluates its body at macro expansion time if it's nested
	;; inside another `eval-when-compile'.  So we use a dynamically
	;; bound variable to avoid nesting them.
	`(progn ,@body)

      `(eval-when-compile
	 ;; In all (X)Emacsen so far, `eval-when-compile' byte compiles
	 ;; its contents before evaluating it.  That can cause forms to
	 ;; be compiled in situations they aren't intended to be
	 ;; compiled.
	 ;;
	 ;; Example: It's not possible to defsubst a primitive, e.g. the
	 ;; following will produce an error (in any emacs flavor), since
	 ;; `nthcdr' is a primitive function that's handled specially by
	 ;; the byte compiler and thus can't be redefined:
	 ;;
	 ;;     (defsubst nthcdr (val) val)
	 ;;
	 ;; `defsubst', like `defmacro', needs to be evaluated at
	 ;; compile time, so this will produce an error during byte
	 ;; compilation.
	 ;;
	 ;; CC Mode occasionally needs to do things like this for
	 ;; cross-emacs compatibility.  It therefore uses the following
	 ;; to conditionally do a `defsubst':
	 ;;
	 ;;     (eval-when-compile
	 ;;       (if (not (fboundp 'foo))
	 ;;           (defsubst foo ...)))
	 ;;
	 ;; But `eval-when-compile' byte compiles its contents and
	 ;; _then_ evaluates it (in all current emacs versions, up to
	 ;; and including Emacs 20.6 and XEmacs 21.1 as of this
	 ;; writing).  So this will still produce an error, since the
	 ;; byte compiler will get to the defsubst anyway.  That's
	 ;; arguably a bug because the point with `eval-when-compile' is
	 ;; that it should evaluate rather than compile its contents.
	 ;;
	 ;; We get around it by expanding the body to a quoted
	 ;; constant that we eval.  That otoh introduce a problem in
	 ;; that a returned lambda expression doesn't get byte
	 ;; compiled (even if `function' is used).
	 (eval '(let ((c-inside-eval-when-compile t)) ,@body)))))

  (put 'cc-eval-when-compile 'lisp-indent-hook 0))

\f
;;; Macros.
(defmacro c--mapcan (fun liszt)
  ;; CC Mode equivalent of `mapcan' which bridges the difference
  ;; between the host [X]Emacsen."
  ;; The motivation for this macro is to avoid the irritating message
  ;; "function `mapcan' from cl package called at runtime" produced by Emacs.
  (cond
   ((and (fboundp 'mapcan)
	 (subrp (symbol-function 'mapcan)))
    ;; XEmacs and Emacs >= 26.
    `(mapcan ,fun ,liszt))
   ((eq c--cl-library 'cl-lib)
    ;; Emacs >= 24.3, < 26.
    `(cl-mapcan ,fun ,liszt))
   (t
    ;; Emacs <= 24.2.  It would be nice to be able to distinguish between
    ;; compile-time and run-time use here.
    `(apply 'nconc (mapcar ,fun ,liszt)))))

(defmacro c--set-difference (liszt1 liszt2 &rest other-args)
  ;; Macro to smooth out the renaming of `set-difference' in Emacs 24.3.
  (if (eq c--cl-library 'cl-lib)
      `(cl-set-difference ,liszt1 ,liszt2 ,@other-args)
    `(set-difference ,liszt1 ,liszt2 ,@other-args)))

(defmacro c--intersection (liszt1 liszt2 &rest other-args)
  ;; Macro to smooth out the renaming of `intersection' in Emacs 24.3.
  (if (eq c--cl-library 'cl-lib)
      `(cl-intersection ,liszt1 ,liszt2 ,@other-args)
    `(intersection ,liszt1 ,liszt2 ,@other-args)))

(eval-and-compile
  (defmacro c--macroexpand-all (form &optional environment)
    ;; Macro to smooth out the renaming of `cl-macroexpand-all' in Emacs 24.3.
    (if (fboundp 'macroexpand-all)
	`(macroexpand-all ,form ,environment)
      `(cl-macroexpand-all ,form ,environment)))

  (defmacro c--delete-duplicates (cl-seq &rest cl-keys)
    ;; Macro to smooth out the renaming of `delete-duplicates' in Emacs 24.3.
    (if (eq c--cl-library 'cl-lib)
	`(cl-delete-duplicates ,cl-seq ,@cl-keys)
      `(delete-duplicates ,cl-seq ,@cl-keys))))

(defmacro c-font-lock-flush (beg end)
  "Declare the region BEG...END's fontification as out-of-date.
On XEmacs and older Emacsen, this refontifies that region immediately."
  (if (fboundp 'font-lock-flush)
      `(font-lock-flush ,beg ,end)
    `(font-lock-fontify-region ,beg ,end)))

(defmacro c-point (position &optional point)
  "Return the value of certain commonly referenced POSITIONs relative to POINT.
The current point is used if POINT isn't specified.  POSITION can be
one of the following symbols:

`bol'   -- beginning of line
`eol'   -- end of line
`eoll'  -- end of logical line (i.e. without escaped NL)
`bod'   -- beginning of defun
`eod'   -- end of defun
`boi'   -- beginning of indentation
`ionl'  -- indentation of next line
`iopl'  -- indentation of previous line
`bonl'  -- beginning of next line
`eonl'  -- end of next line
`bopl'  -- beginning of previous line
`eopl'  -- end of previous line
`bosws' -- beginning of syntactic whitespace
`eosws' -- end of syntactic whitespace

If the referenced position doesn't exist, the closest accessible point
to it is returned.  This function does not modify the point or the mark."

  (if (eq (car-safe position) 'quote)
      (let ((position (eval position)))
	(cond

	 ((eq position 'bol)
	  (if (and (cc-bytecomp-fboundp 'line-beginning-position) (not point))
	      '(line-beginning-position)
	    `(save-excursion
	       ,@(if point `((goto-char ,point)))
	       (beginning-of-line)
	       (point))))

	 ((eq position 'eol)
	  (if (and (cc-bytecomp-fboundp 'line-end-position) (not point))
	      '(line-end-position)
	    `(save-excursion
	       ,@(if point `((goto-char ,point)))
	       (end-of-line)
	       (point))))

	 ((eq position 'eoll)
	  `(save-excursion
	     ,@(if point `((goto-char ,point)))
	     (while (and
		     (not (eobp))
		     (progn
		       (end-of-line)
		       (c-is-escaped (point))
		       ;; (prog1 (eq (logand 1 (skip-chars-backward "\\\\")) 1))
		       ))
	       (forward-line))
	     (end-of-line)
	     (point)))

	 ((eq position 'boi)
	  `(save-excursion
	     ,@(if point `((goto-char ,point)))
	     (back-to-indentation)
	     (point)))

	 ((eq position 'bod)
	  `(save-excursion
	     ,@(if point `((goto-char ,point)))
	     (c-beginning-of-defun-1)
	     (point)))

	 ((eq position 'eod)
	  `(save-excursion
	     ,@(if point `((goto-char ,point)))
	     (c-end-of-defun-1)
	     (point)))

	 ((eq position 'bopl)
	  (if (and (cc-bytecomp-fboundp 'line-beginning-position) (not point))
	      '(line-beginning-position 0)
	    `(save-excursion
	       ,@(if point `((goto-char ,point)))
	       (forward-line -1)
	       (point))))

	 ((eq position 'bonl)
	  (if (and (cc-bytecomp-fboundp 'line-beginning-position) (not point))
	      '(line-beginning-position 2)
	    `(save-excursion
	       ,@(if point `((goto-char ,point)))
	       (forward-line 1)
	       (point))))

	 ((eq position 'eopl)
	  (if (and (cc-bytecomp-fboundp 'line-end-position) (not point))
	      '(line-end-position 0)
	    `(save-excursion
	       ,@(if point `((goto-char ,point)))
	       (beginning-of-line)
	       (or (bobp) (backward-char))
	       (point))))

	 ((eq position 'eonl)
	  (if (and (cc-bytecomp-fboundp 'line-end-position) (not point))
	      '(line-end-position 2)
	    `(save-excursion
	       ,@(if point `((goto-char ,point)))
	       (forward-line 1)
	       (end-of-line)
	       (point))))

	 ((eq position 'iopl)
	  `(save-excursion
	     ,@(if point `((goto-char ,point)))
	     (forward-line -1)
	     (back-to-indentation)
	     (point)))

	 ((eq position 'ionl)
	  `(save-excursion
	     ,@(if point `((goto-char ,point)))
	     (forward-line 1)
	     (back-to-indentation)
	     (point)))

	 ((eq position 'bosws)
	  `(save-excursion
	     ,@(if point `((goto-char ,point)))
	     (c-backward-syntactic-ws)
	     (point)))

	 ((eq position 'eosws)
	  `(save-excursion
	     ,@(if point `((goto-char ,point)))
	     (c-forward-syntactic-ws)
	     (point)))

	 (t (error "Unknown buffer position requested: %s" position))))

    ;; The bulk of this should perhaps be in a function to avoid large
    ;; expansions, but this case is not used anywhere in CC Mode (and
    ;; probably not anywhere else either) so we only have it to be on
    ;; the safe side.
    (message "Warning: c-point long expansion")
    `(save-excursion
       ,@(if point `((goto-char ,point)))
       (let ((position ,position))
	 (cond
	  ((eq position 'bol)	(beginning-of-line))
	  ((eq position 'eol)	(end-of-line))
	  ((eq position 'boi)	(back-to-indentation))
	  ((eq position 'bod)	(c-beginning-of-defun-1))
	  ((eq position 'eod)	(c-end-of-defun-1))
	  ((eq position 'bopl)	(forward-line -1))
	  ((eq position 'bonl)	(forward-line 1))
	  ((eq position 'eopl)	(progn
				  (beginning-of-line)
				  (or (bobp) (backward-char))))
	  ((eq position 'eonl)	(progn
				  (forward-line 1)
				  (end-of-line)))
	  ((eq position 'iopl)	(progn
				  (forward-line -1)
				  (back-to-indentation)))
	  ((eq position 'ionl)	(progn
				  (forward-line 1)
				(back-to-indentation)))
	  ((eq position 'bosws)	(c-backward-syntactic-ws))
	  ((eq position 'eosws)	(c-forward-syntactic-ws))
	  (t (error "Unknown buffer position requested: %s" position))))
       (point))))

(defvar lookup-syntax-properties)       ;XEmacs.

(eval-and-compile
  ;; Constant to decide at compilation time whether to use category
  ;; properties.  Currently (2010-03) they're available only on GNU Emacs.
  (defconst c-use-category
    (with-temp-buffer
      (let ((parse-sexp-lookup-properties t)
	    (lookup-syntax-properties t))
        (set-syntax-table (make-syntax-table))
        (insert "<()>")
        (put-text-property (point-min) (1+ (point-min))
			   'category 'c-<-as-paren-syntax)
        (put-text-property (+ 3 (point-min)) (+ 4 (point-min))
			   'category 'c->-as-paren-syntax)
        (goto-char (point-min))
        (forward-sexp)
        (= (point) (+ 4 (point-min)))))))

(defmacro c-is-escaped (pos)
  ;; Are there an odd number of backslashes before POS?
  `(save-excursion
     (goto-char ,pos)
     (not (zerop (logand (skip-chars-backward "\\\\") 1)))))

(defmacro c-will-be-escaped (pos beg end)
  ;; Will the character after POS be escaped after the removal of (BEG END)?
  ;; It is assumed that (>= POS END).
  `(save-excursion
     (let ((-end- ,end)
	   count)
       (goto-char ,pos)
       (setq count (skip-chars-backward "\\\\" -end-))
       (when (eq (point) -end-)
	 (goto-char ,beg)
	 (setq count (+ count (skip-chars-backward "\\\\"))))
       (not (zerop (logand count 1))))))

(defmacro c-will-be-unescaped (beg end)
  ;; Would the character after END be unescaped after the removal of (BEG END)?
  ;; This is regardless of its current status.  It is assumed that (>= POS END).
  `(save-excursion
    (let (count)
      (goto-char ,beg)
      (setq count (skip-chars-backward "\\\\"))
      (zerop (logand count 1)))))

(defvar c-use-extents)

(defmacro c-next-single-property-change (position prop &optional object limit)
  ;; See the doc string for either of the defuns expanded to.
  (if (and c-use-extents
	   (fboundp 'next-single-char-property-change))
      ;; XEmacs >= 2005-01-25
      `(next-single-char-property-change ,position ,prop ,object ,limit)
    ;; Emacs and earlier XEmacs
    `(next-single-property-change ,position ,prop ,object ,limit)))

(defmacro c-previous-single-property-change (position prop &optional object limit)
  ;; See the doc string for either of the defuns expanded to.
  (if (and c-use-extents
	   (fboundp 'previous-single-char-property-change))
      ;; XEmacs >= 2005-01-25
      `(previous-single-char-property-change ,position ,prop ,object ,limit)
    ;; Emacs and earlier XEmacs
    `(previous-single-property-change ,position ,prop ,object ,limit)))

(defmacro c-region-is-active-p ()
  ;; Return t when the region is active.  The determination of region
  ;; activeness is different in both Emacs and XEmacs.
  (if (cc-bytecomp-fboundp 'region-active-p)
      ;; XEmacs.
      '(region-active-p)
    ;; Old Emacs.
    'mark-active))

(defmacro c-set-region-active (activate)
  ;; Activate the region if ACTIVE is non-nil, deactivate it
  ;; otherwise.  Covers the differences between Emacs and XEmacs.
  (if (fboundp 'zmacs-activate-region)
      ;; XEmacs.
      `(if ,activate
	   (zmacs-activate-region)
	 (zmacs-deactivate-region))
    ;; Emacs.
    `(setq mark-active ,activate)))

(defmacro c-set-keymap-parent (map parent)
  (cond
   ;; XEmacs
   ((cc-bytecomp-fboundp 'set-keymap-parents)
    `(set-keymap-parents ,map ,parent))
   ;; Emacs
   ((cc-bytecomp-fboundp 'set-keymap-parent)
    `(set-keymap-parent ,map ,parent))
   ;; incompatible
   (t (error "CC Mode is incompatible with this version of Emacs"))))

(defmacro c-delete-and-extract-region (start end)
  "Delete the text between START and END and return it."
  (if (cc-bytecomp-fboundp 'delete-and-extract-region)
      ;; Emacs 21.1 and later
      `(delete-and-extract-region ,start ,end)
    ;; XEmacs and Emacs 20.x
    `(prog1
       (buffer-substring ,start ,end)
       (delete-region ,start ,end))))

(defmacro c-safe (&rest body)
  ;; safely execute BODY, return nil if an error occurred
  `(condition-case nil
       (progn ,@body)
     (error nil)))
(put 'c-safe 'lisp-indent-function 0)

(defmacro c-int-to-char (integer)
  ;; In Emacs, a character is an integer.  In XEmacs, a character is a
  ;; type distinct from an integer.  Sometimes we need to convert integers to
  ;; characters.  `c-int-to-char' makes this conversion, if necessary.
  (if (fboundp 'int-to-char)
      `(int-to-char ,integer)
    integer))

(defmacro c-characterp (arg)
  ;; Return t when ARG is a character (XEmacs) or integer (Emacs), otherwise
  ;; return nil.
  (if (integerp ?c)
      `(integerp ,arg)
    `(characterp ,arg)))

(defmacro c-last-command-char ()
  ;; The last character just typed.  Note that `last-command-event' exists in
  ;; both Emacs and XEmacs, but with confusingly different meanings.
  (if (featurep 'xemacs)
      'last-command-char
    'last-command-event))

(defmacro c-sentence-end ()
  ;; Get the regular expression `sentence-end'.
  (if (cc-bytecomp-fboundp 'sentence-end)
      ;; Emacs 22:
      '(sentence-end)
    ;; Emacs <22 + XEmacs
    'sentence-end))

(defmacro c-default-value-sentence-end ()
  ;; Get the default value of the variable sentence end.
  (if (cc-bytecomp-fboundp 'sentence-end)
      ;; Emacs 22:
      '(let (sentence-end) (sentence-end))
    ;; Emacs <22 + XEmacs
    '(default-value 'sentence-end)))

(defconst c-c++-raw-string-opener-re "R\"\\([^ ()\\\n\r\t]\\{0,16\\}\\)(")
;; Matches a C++ raw string opener.  Submatch 1 is its identifier.

(defconst c-c++-raw-string-opener-1-re "\"\\([^ ()\\\n\r\t]\\{0,16\\}\\)(")
;; Matches a C++ raw string opener starting after the initial R.

(defmacro c-sub-at-c++-raw-string-opener ()
  `(save-excursion
     (and
      (if (eq (char-after) ?R)
	  (progn (forward-char) t)
	(eq (char-before) ?R))
      (looking-at c-c++-raw-string-opener-1-re))))

(defmacro c-at-c++-raw-string-opener (&optional pos)
  ;; Return non-nil if POS (default point) is either at the start of a C++ raw
  ;; string opener, or after the introductory R of one.  The match data is
  ;; overwritten.  On success the opener's identifier will be (match-string
  ;; 1).  Text properties on any characters are ignored.
  (if pos
      `(save-excursion
	 (goto-char ,pos)
	 (c-sub-at-c++-raw-string-opener))
    `(c-sub-at-c++-raw-string-opener)))

;; The following is essentially `save-buffer-state' from lazy-lock.el.
;; It ought to be a standard macro.
(defmacro c-save-buffer-state (varlist &rest body)
  "Bind variables according to VARLIST (in `let*' style) and eval BODY,
then restore the buffer state under the assumption that no significant
modification has been made in BODY.  A change is considered
significant if it affects the buffer text in any way that isn't
completely restored again.  Changes in text properties like `face' or
`syntax-table' are considered insignificant.  This macro allows text
properties to be changed, even in a read-only buffer.

This macro should be placed around all calculations which set
\"insignificant\" text properties in a buffer, even when the buffer is
known to be writable.  That way, these text properties remain set
even if the user undoes the command which set them.

This macro should ALWAYS be placed around \"temporary\" internal buffer
changes (like adding a newline to calculate a text-property then
deleting it again), so that the user never sees them on his
`buffer-undo-list'.  See also `c-tentative-buffer-changes'.

However, any user-visible changes to the buffer (like auto-newlines)
must not be within a `c-save-buffer-state', since the user then
wouldn't be able to undo them.

The return value is the value of the last form in BODY."
  (declare (debug t) (indent 1))
  (if (fboundp 'with-silent-modifications)
      `(with-silent-modifications (let* ,varlist ,@body))
    `(let* ((modified (buffer-modified-p)) (buffer-undo-list t)
	    (inhibit-read-only t) (inhibit-point-motion-hooks t)
	    before-change-functions after-change-functions
	    deactivate-mark
	    buffer-file-name buffer-file-truename ; Prevent primitives checking
						  ; for file modification
	    ,@varlist)
       (unwind-protect
	   (progn ,@body)
	 (and (not modified)
	      (buffer-modified-p)
	      (set-buffer-modified-p nil))))))

(defmacro c-tentative-buffer-changes (&rest body)
  "Eval BODY and optionally restore the buffer contents to the state it
was in before BODY.  Any changes are kept if the last form in BODY
returns non-nil.  Otherwise it's undone using the undo facility, and
various other buffer state that might be affected by the changes is
restored.  That includes the current buffer, point, mark, mark
activation (similar to `save-excursion'), and the modified state.
The state is also restored if BODY exits nonlocally.

If BODY makes a change that unconditionally is undone then wrap this
macro inside `c-save-buffer-state'.  That way the change can be done
even when the buffer is read-only, and without interference from
various buffer change hooks."
  `(let (-tnt-chng-keep
	 -tnt-chng-state)
     (unwind-protect
	 ;; Insert an undo boundary for use with `undo-more'.  We
	 ;; don't use `undo-boundary' since it doesn't insert one
	 ;; unconditionally.
	 (setq buffer-undo-list (cons nil buffer-undo-list)
	       -tnt-chng-state (c-tnt-chng-record-state)
	       -tnt-chng-keep (progn ,@body))
       (c-tnt-chng-cleanup -tnt-chng-keep -tnt-chng-state))))
(put 'c-tentative-buffer-changes 'lisp-indent-function 0)

(defun c-tnt-chng-record-state ()
  ;; Used internally in `c-tentative-buffer-changes'.
  (vector buffer-undo-list		; 0
	  (current-buffer)		; 1
	  ;; No need to use markers for the point and mark; if the
	  ;; undo got out of synch we're hosed anyway.
	  (point)			; 2
	  (mark t)			; 3
	  (c-region-is-active-p)	; 4
	  (buffer-modified-p)))		; 5

(defun c-tnt-chng-cleanup (keep saved-state)
  ;; Used internally in `c-tentative-buffer-changes'.

  (let ((saved-undo-list (elt saved-state 0)))
    (if (eq buffer-undo-list saved-undo-list)
	;; No change was done after all.
	(setq buffer-undo-list (cdr saved-undo-list))

      (if keep
	  ;; Find and remove the undo boundary.
	  (let ((p buffer-undo-list))
	    (while (not (eq (cdr p) saved-undo-list))
	      (setq p (cdr p)))
	    (setcdr p (cdr saved-undo-list)))

	;; `primitive-undo' will remove the boundary.
	(setq saved-undo-list (cdr saved-undo-list))
	(let ((undo-in-progress t))
	  (while (not (eq (setq buffer-undo-list
				(primitive-undo 1 buffer-undo-list))
			  saved-undo-list))))

	(when (buffer-live-p (elt saved-state 1))
	  (set-buffer (elt saved-state 1))
	  (goto-char (elt saved-state 2))
	  (set-mark (elt saved-state 3))
	  (c-set-region-active (elt saved-state 4))
	  (and (not (elt saved-state 5))
	       (buffer-modified-p)
	       (set-buffer-modified-p nil)))))))

(defmacro c-forward-syntactic-ws (&optional limit)
  "Forward skip over syntactic whitespace.
Syntactic whitespace is defined as whitespace characters, comments,
and preprocessor directives.  However if point starts inside a comment
or preprocessor directive, the content of it is not treated as
whitespace.

LIMIT sets an upper limit of the forward movement, if specified.  If
LIMIT or the end of the buffer is reached inside a comment or
preprocessor directive, the point will be left there.

Note that this function might do hidden buffer changes.  See the
comment at the start of cc-engine.el for more info."
  (if limit
      `(save-restriction
	 (narrow-to-region (point-min) (or ,limit (point-max)))
	 (c-forward-sws))
    '(c-forward-sws)))

(defmacro c-backward-syntactic-ws (&optional limit)
  "Backward skip over syntactic whitespace.
Syntactic whitespace is defined as whitespace characters, comments,
and preprocessor directives.  However if point starts inside a comment
or preprocessor directive, the content of it is not treated as
whitespace.

LIMIT sets a lower limit of the backward movement, if specified.  If
LIMIT is reached inside a line comment or preprocessor directive then
the point is moved into it past the whitespace at the end.

Note that this function might do hidden buffer changes.  See the
comment at the start of cc-engine.el for more info."
  (if limit
      `(save-restriction
	 (narrow-to-region (or ,limit (point-min)) (point-max))
	 (c-backward-sws))
    '(c-backward-sws)))

(defmacro c-forward-sexp (&optional count)
  "Move forward across COUNT balanced expressions.
A negative COUNT means move backward.  Signal an error if the move
fails for any reason.

This is like `forward-sexp' except that it isn't interactive and does
not do any user friendly adjustments of the point and that it isn't
susceptible to user configurations such as disabling of signals in
certain situations."
  (or count (setq count 1))
  `(goto-char (scan-sexps (point) ,count)))

(defmacro c-backward-sexp (&optional count)
  "See `c-forward-sexp' and reverse directions."
  (or count (setq count 1))
  `(c-forward-sexp ,(if (numberp count) (- count) `(- ,count))))

(defmacro c-safe-scan-lists (from count depth &optional limit)
  "Like `scan-lists' but returns nil instead of signaling errors
for unbalanced parens.

A limit for the search may be given.  FROM is assumed to be on the
right side of it."
  (let ((res (if (featurep 'xemacs)
		 `(scan-lists ,from ,count ,depth nil t)
	       `(c-safe (scan-lists ,from ,count ,depth)))))
    (if limit
	`(save-restriction
	   (when ,limit
	     ,(if (numberp count)
		  (if (< count 0)
		      `(narrow-to-region ,limit (point-max))
		    `(narrow-to-region (point-min) ,limit))
		`(if (< ,count 0)
		     (narrow-to-region ,limit (point-max))
		   (narrow-to-region (point-min) ,limit))))
	   ,res)
      res)))

\f
;; Wrappers for common scan-lists cases, mainly because it's almost
;; impossible to get a feel for how that function works.

(defmacro c-go-list-forward (&optional pos limit)
  "Move forward across one balanced group of parentheses starting at POS or
point.  Return POINT when we succeed, NIL when we fail.  In the latter case,
leave point unmoved.

A LIMIT for the search may be given.  The start position is assumed to be
before it."
  `(let ((dest (c-safe-scan-lists ,(or pos '(point)) 1 0 ,limit)))
     (when dest (goto-char dest) dest)))

(defmacro c-go-list-backward (&optional pos limit)
  "Move backward across one balanced group of parentheses starting at POS or
point.  Return POINT when we succeed, NIL when we fail.  In the latter case,
leave point unmoved.

A LIMIT for the search may be given.  The start position is assumed to be
after it."
  `(let ((dest (c-safe-scan-lists ,(or pos '(point)) -1 0 ,limit)))
     (when dest (goto-char dest) dest)))

(defmacro c-up-list-forward (&optional pos limit)
  "Return the first position after the list sexp containing POS,
or nil if no such position exists.  The point is used if POS is left out.

A limit for the search may be given.  The start position is assumed to
be before it."
  `(c-safe-scan-lists ,(or pos '(point)) 1 1 ,limit))

(defmacro c-up-list-backward (&optional pos limit)
  "Return the position of the start of the list sexp containing POS,
or nil if no such position exists.  The point is used if POS is left out.

A limit for the search may be given.  The start position is assumed to
be after it."
  `(c-safe-scan-lists ,(or pos '(point)) -1 1 ,limit))

(defmacro c-down-list-forward (&optional pos limit)
  "Return the first position inside the first list sexp after POS,
or nil if no such position exists.  The point is used if POS is left out.

A limit for the search may be given.  The start position is assumed to
be before it."
  `(c-safe-scan-lists ,(or pos '(point)) 1 -1 ,limit))

(defmacro c-down-list-backward (&optional pos limit)
  "Return the last position inside the last list sexp before POS,
or nil if no such position exists.  The point is used if POS is left out.

A limit for the search may be given.  The start position is assumed to
be after it."
  `(c-safe-scan-lists ,(or pos '(point)) -1 -1 ,limit))

(defmacro c-go-up-list-forward (&optional pos limit)
  "Move the point to the first position after the list sexp containing POS,
or containing the point if POS is left out.  Return t if such a
position exists, otherwise nil is returned and the point isn't moved.

A limit for the search may be given.  The start position is assumed to
be before it."
  `(let ((dest (c-up-list-forward ,pos ,limit)))
     (when dest (goto-char dest) t)))

(defmacro c-go-up-list-backward (&optional pos limit)
  "Move the point to the position of the start of the list sexp containing POS,
or containing the point if POS is left out.  Return t if such a
position exists, otherwise nil is returned and the point isn't moved.

A limit for the search may be given.  The start position is assumed to
be after it."
  `(let ((dest (c-up-list-backward ,pos ,limit)))
     (when dest (goto-char dest) t)))

(defmacro c-go-down-list-forward (&optional pos limit)
  "Move the point to the first position inside the first list sexp after POS,
or before the point if POS is left out.  Return t if such a position
exists, otherwise nil is returned and the point isn't moved.

A limit for the search may be given.  The start position is assumed to
be before it."
  `(let ((dest (c-down-list-forward ,pos ,limit)))
     (when dest (goto-char dest) t)))

(defmacro c-go-down-list-backward (&optional pos limit)
  "Move the point to the last position inside the last list sexp before POS,
or before the point if POS is left out.  Return t if such a position
exists, otherwise nil is returned and the point isn't moved.

A limit for the search may be given.  The start position is assumed to
be after it."
  `(let ((dest (c-down-list-backward ,pos ,limit)))
     (when dest (goto-char dest) t)))
\f
(defmacro c-beginning-of-defun-1 ()
  ;; Wrapper around beginning-of-defun.
  ;;
  ;; NOTE: This function should contain the only explicit use of
  ;; beginning-of-defun in CC Mode.  Eventually something better than
  ;; b-o-d will be available and this should be the only place the
  ;; code needs to change.  Everything else should use
  ;; (c-beginning-of-defun-1)
  ;;
  ;; This is really a bit too large to be a macro but that isn't a
  ;; problem as long as it only is used in one place in
  ;; `c-parse-state'.

  `(progn
     (if (and ,(fboundp 'buffer-syntactic-context-depth)
	      c-enable-xemacs-performance-kludge-p)
	 ,(when (fboundp 'buffer-syntactic-context-depth)
	    ;; XEmacs only.  This can improve the performance of
	    ;; c-parse-state to between 3 and 60 times faster when
	    ;; braces are hung.  It can also degrade performance by
	    ;; about as much when braces are not hung.
	    '(let (beginning-of-defun-function end-of-defun-function
					       pos)
	       (while (not pos)
		 (save-restriction
		   (widen)
		   (setq pos (c-safe-scan-lists
			      (point) -1 (buffer-syntactic-context-depth))))
		 (cond
		  ((bobp) (setq pos (point-min)))
		  ((not pos)
		   (let ((distance (skip-chars-backward "^{")))
		     ;; unbalanced parenthesis, while invalid C code,
		     ;; shouldn't cause an infloop!  See unbal.c
		     (when (zerop distance)
		       ;; Punt!
		       (beginning-of-defun)
		       (setq pos (point)))))
		  ((= pos 0))
		  ((not (eq (char-after pos) ?{))
		   (goto-char pos)
		   (setq pos nil))
		  ))
	       (goto-char pos)))
       ;; Emacs, which doesn't have buffer-syntactic-context-depth
       (let (beginning-of-defun-function end-of-defun-function)
	 (beginning-of-defun)))
     ;; if defun-prompt-regexp is non-nil, b-o-d won't leave us at the
     ;; open brace.
     (and defun-prompt-regexp
	  (looking-at defun-prompt-regexp)
	  (goto-char (match-end 0)))))

\f
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; V i r t u a l   S e m i c o l o n s
;;
;; In most CC Mode languages, statements are terminated explicitly by
;; semicolons or closing braces.  In some of the CC modes (currently AWK Mode
;; and certain user-specified #define macros in C, C++, etc. (November 2008)),
;; statements are (or can be) terminated by EOLs.  Such a statement is said to
;; be terminated by a "virtual semicolon" (VS).  A statement terminated by an
;; actual semicolon or brace is never considered to have a VS.
;;
;; The indentation engine (or whatever) tests for a VS at a specific position
;; by invoking the macro `c-at-vsemi-p', which in its turn calls the mode
;; specific function (if any) which is the value of the language variable
;; `c-at-vsemi-p-fn'.  This function should only use "low-level" features of
;; CC Mode, i.e. features which won't trigger infinite recursion.  ;-) The
;; actual details of what constitutes a VS in a language are thus encapsulated
;; in code specific to that language (e.g. cc-awk.el).  `c-at-vsemi-p' returns
;; non-nil if point (or the optional parameter POS) is at a VS, nil otherwise.
;;
;; The language specific function might well do extensive analysis of the
;; source text, and may use a caching scheme to speed up repeated calls.
;;
;; The "virtual semicolon" lies just after the last non-ws token on the line.
;; Like POINT, it is considered to lie between two characters.  For example,
;; at the place shown in the following AWK source line:
;;
;;          kbyte = 1024             # 1000 if you're not picky
;;                      ^
;;                      |
;;              Virtual Semicolon
;;
;; In addition to `c-at-vsemi-p-fn', a mode may need to supply a function for
;; `c-vsemi-status-unknown-p-fn'.  The macro `c-vsemi-status-unknown-p' is a
;; rather recondite kludge.  It exists because the function
;; `c-beginning-of-statement-1' sometimes tests for VSs as an optimization,
;; but `c-at-vsemi-p' might well need to call `c-beginning-of-statement-1' in
;; its calculations, thus potentially leading to infinite recursion.
;;
;; The macro `c-vsemi-status-unknown-p' resolves this problem; it may return
;; non-nil at any time; returning nil is a guarantee that an immediate
;; invocation of `c-at-vsemi-p' at point will NOT call
;; `c-beginning-of-statement-1'.  `c-vsemi-status-unknown-p' may not itself
;; call `c-beginning-of-statement-1'.
;;
;; The macro `c-vsemi-status-unknown-p' will typically check the caching
;; scheme used by the `c-at-vsemi-p-fn', hence the name - the status is
;; "unknown" if there is no cache entry current for the line.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

(defmacro c-at-vsemi-p (&optional pos)
  ;; Is there a virtual semicolon (not a real one or a }) at POS (defaults to
  ;; point)?  Always returns nil for languages which don't have Virtual
  ;; semicolons.
  ;; This macro might do hidden buffer changes.
  `(if c-at-vsemi-p-fn
       (funcall c-at-vsemi-p-fn ,@(if pos `(,pos)))))

(defmacro c-vsemi-status-unknown-p ()
  ;; Return NIL only if it can be guaranteed that an immediate
  ;; (c-at-vsemi-p) will NOT call c-beginning-of-statement-1.  Otherwise,
  ;; return non-nil.  (See comments above).  The function invoked by this
  ;; macro MUST NOT UNDER ANY CIRCUMSTANCES itself call
  ;; c-beginning-of-statement-1.
  ;; Languages which don't have EOL terminated statements always return NIL
  ;; (they _know_ there's no vsemi ;-).
  '(if c-vsemi-status-unknown-p-fn (funcall c-vsemi-status-unknown-p-fn)))

\f
(defmacro c-benign-error (format &rest args)
  ;; Formats an error message for the echo area and dings, i.e. like
  ;; `error' but doesn't abort.
  `(progn
     (message ,format ,@args)
     (ding)))

(defmacro c-with-syntax-table (table &rest code)
  ;; Temporarily switches to the specified syntax table in a failsafe
  ;; way to execute code.
  ;; Maintainers' note: If TABLE is `c++-template-syntax-table', DON'T call
  ;; any forms inside this that call `c-parse-state'.  !!!!
  `(let ((c-with-syntax-table-orig-table (syntax-table)))
     (unwind-protect
	 (progn
	   (set-syntax-table ,table)
	   ,@code)
       (set-syntax-table c-with-syntax-table-orig-table))))
(put 'c-with-syntax-table 'lisp-indent-function 1)

(defmacro c-skip-ws-forward (&optional limit)
  "Skip over any whitespace following point.
This function skips over horizontal and vertical whitespace and line
continuations."
  (if limit
      `(let ((limit (or ,limit (point-max))))
	 (while (progn
		  ;; skip-syntax-* doesn't count \n as whitespace..
		  (skip-chars-forward " \t\n\r\f\v" limit)
		  (when (and (eq (char-after) ?\\)
			     (< (point) limit))
		    (forward-char)
		    (or (eolp)
			(progn (backward-char) nil))))))
    '(while (progn
	      (skip-chars-forward " \t\n\r\f\v")
	      (when (eq (char-after) ?\\)
		(forward-char)
		(or (eolp)
		    (progn (backward-char) nil)))))))

(defmacro c-skip-ws-backward (&optional limit)
  "Skip over any whitespace preceding point.
This function skips over horizontal and vertical whitespace and line
continuations."
  (if limit
      `(let ((limit (or ,limit (point-min))))
	 (while (progn
		  ;; skip-syntax-* doesn't count \n as whitespace..
		  (skip-chars-backward " \t\n\r\f\v" limit)
		  (and (eolp)
		       (eq (char-before) ?\\)
		       (> (point) limit)))
	   (backward-char)))
    '(while (progn
	      (skip-chars-backward " \t\n\r\f\v")
	      (and (eolp)
		   (eq (char-before) ?\\)))
       (backward-char))))

(eval-and-compile
  (defvar c-langs-are-parametric nil))

(defmacro c-major-mode-is (mode)
  "Return non-nil if the current CC Mode major mode is MODE.
MODE is either a mode symbol or a list of mode symbols."

  (if c-langs-are-parametric
      ;; Inside a `c-lang-defconst'.
      `(c-lang-major-mode-is ,mode)

    (if (eq (car-safe mode) 'quote)
	(let ((mode (eval mode)))
	  (if (listp mode)
	      `(memq c-buffer-is-cc-mode ',mode)
	    `(eq c-buffer-is-cc-mode ',mode)))

      `(let ((mode ,mode))
	 (if (listp mode)
	     (memq c-buffer-is-cc-mode mode)
	   (eq c-buffer-is-cc-mode mode))))))

\f
;; Macros/functions to handle so-called "char properties", which are
;; properties set on a single character and that never spread to any
;; other characters.

(eval-and-compile
  ;; Constant used at compile time to decide whether or not to use
  ;; XEmacs extents.  Check all the extent functions we'll use since
  ;; some packages might add compatibility aliases for some of them in
  ;; Emacs.
  (defconst c-use-extents (and (cc-bytecomp-fboundp 'extent-at)
			       (cc-bytecomp-fboundp 'set-extent-property)
			       (cc-bytecomp-fboundp 'set-extent-properties)
			       (cc-bytecomp-fboundp 'make-extent)
			       (cc-bytecomp-fboundp 'extent-property)
			       (cc-bytecomp-fboundp 'delete-extent)
			       (cc-bytecomp-fboundp 'map-extents))))

(defconst c-<-as-paren-syntax '(4 . ?>))
(put 'c-<-as-paren-syntax 'syntax-table c-<-as-paren-syntax)

(defconst c->-as-paren-syntax '(5 . ?<))
(put 'c->-as-paren-syntax 'syntax-table c->-as-paren-syntax)

;; `c-put-char-property' is complex enough in XEmacs and Emacs < 21 to
;; make it a function.
(defalias 'c-put-char-property-fun
  (cc-eval-when-compile
    (cond (c-use-extents
	   ;; XEmacs.
	   (byte-compile
	    (lambda (pos property value)
	      (let ((ext (extent-at pos nil property)))
		(if ext
		    (set-extent-property ext property value)
		  (set-extent-properties (make-extent pos (1+ pos))
					 (cons property
					       (cons value
						     '(start-open t
						       end-open t)))))))))

	  ((not (cc-bytecomp-boundp 'text-property-default-nonsticky))
	   ;; In Emacs < 21 we have to mess with the `rear-nonsticky' property.
	   (byte-compile
	    (lambda (pos property value)
	      (put-text-property pos (1+ pos) property value)
	      (let ((prop (get-text-property pos 'rear-nonsticky)))
		(or (memq property prop)
		    (put-text-property pos (1+ pos)
				       'rear-nonsticky
				       (cons property prop)))))))
	  ;; This won't be used for anything.
	  (t 'ignore))))
(cc-bytecomp-defun c-put-char-property-fun) ; Make it known below.

(defmacro c-put-char-property (pos property value)
  ;; Put the given property with the given value on the character at
  ;; POS and make it front and rear nonsticky, or start and end open
  ;; in XEmacs vocabulary.  If the character already has the given
  ;; property then the value is replaced, and the behavior is
  ;; undefined if that property has been put by some other function.
  ;; PROPERTY is assumed to be constant.
  ;;
  ;; If there's a `text-property-default-nonsticky' variable (Emacs
  ;; 21) then it's assumed that the property is present on it.
  ;;
  ;; This macro does a hidden buffer change.
  (setq property (eval property))
  (if (or c-use-extents
	  (not (cc-bytecomp-boundp 'text-property-default-nonsticky)))
      ;; XEmacs and Emacs < 21.
      `(c-put-char-property-fun ,pos ',property ,value)
    ;; In Emacs 21 we got the `rear-nonsticky' property covered
    ;; by `text-property-default-nonsticky'.
    `(let ((-pos- ,pos))
       ,@(when (and (fboundp 'syntax-ppss)
		    (eq `,property 'syntax-table))
	   `((setq c-syntax-table-hwm (min c-syntax-table-hwm -pos-))))
       (put-text-property -pos- (1+ -pos-) ',property ,value))))

(defmacro c-get-char-property (pos property)
  ;; Get the value of the given property on the character at POS if
  ;; it's been put there by `c-put-char-property'.  PROPERTY is
  ;; assumed to be constant.
  (setq property (eval property))
  (if c-use-extents
      ;; XEmacs.
      `(let ((ext (extent-at ,pos nil ',property)))
	 (if ext (extent-property ext ',property)))
    ;; Emacs.
    `(get-text-property ,pos ',property)))

;; `c-clear-char-property' is complex enough in Emacs < 21 to make it
;; a function, since we have to mess with the `rear-nonsticky' property.
(defalias 'c-clear-char-property-fun
  (cc-eval-when-compile
    (unless (or c-use-extents
		(cc-bytecomp-boundp 'text-property-default-nonsticky))
      (byte-compile
       (lambda (pos property)
	 (when (get-text-property pos property)
	   (remove-text-properties pos (1+ pos) (list property nil))
	   (put-text-property pos (1+ pos)
			      'rear-nonsticky
			      (delq property (get-text-property
					      pos 'rear-nonsticky)))))))))
(cc-bytecomp-defun c-clear-char-property-fun) ; Make it known below.

(defmacro c-clear-char-property (pos property)
  ;; Remove the given property on the character at POS if it's been put
  ;; there by `c-put-char-property'.  PROPERTY is assumed to be
  ;; constant.
  ;;
  ;; This macro does a hidden buffer change.
  (setq property (eval property))
  (cond (c-use-extents
	 ;; XEmacs.
	 `(let ((ext (extent-at ,pos nil ',property)))
	    (if ext (delete-extent ext))))
	((cc-bytecomp-boundp 'text-property-default-nonsticky)
	 ;; In Emacs 21 we got the `rear-nonsticky' property covered
	 ;; by `text-property-default-nonsticky'.
	 `(let ((pos ,pos))
	    ,@(when (and (fboundp 'syntax-ppss)
			 (eq `,property 'syntax-table))
		    `((setq c-syntax-table-hwm (min c-syntax-table-hwm pos))))
	    (remove-text-properties pos (1+ pos)
				    '(,property nil))))
	(t
	 ;; Emacs < 21.
	 `(c-clear-char-property-fun ,pos ',property))))

(defmacro c-min-property-position (from to property)
  ;; Return the first position in the range [FROM to) where the text property
  ;; PROPERTY is set, or `most-positive-fixnum' if there is no such position.
  ;; PROPERTY should be a quoted constant.
  `(let ((-from- ,from) (-to- ,to) pos)
     (cond
      ((and (< -from- -to-)
	    (get-text-property -from- ,property))
       -from-)
      ((< (setq pos (next-single-property-change -from- ,property nil -to-))
	  -to-)
       pos)
      (most-positive-fixnum))))

(defmacro c-clear-char-properties (from to property)
  ;; Remove all the occurrences of the given property in the given
  ;; region that has been put with `c-put-char-property'.  PROPERTY is
  ;; assumed to be constant.
  ;;
  ;; Note that this function does not clean up the property from the
  ;; lists of the `rear-nonsticky' properties in the region, if such
  ;; are used.  Thus it should not be used for common properties like
  ;; `syntax-table'.
  ;;
  ;; This macro does hidden buffer changes.
  (setq property (eval property))
  (if c-use-extents
      ;; XEmacs.
      `(map-extents (lambda (ext ignored)
		      (delete-extent ext))
		    nil ,from ,to nil nil ',property)
    ;; Emacs.
    (if (and (fboundp 'syntax-ppss)
	     (eq `,property 'syntax-table))
	`(let ((-from- ,from) (-to- ,to))
	   (setq c-syntax-table-hwm
		 (min c-syntax-table-hwm
		      (c-min-property-position -from- -to- ',property)))
	   (remove-text-properties -from- -to- '(,property nil)))
      `(remove-text-properties ,from ,to '(,property nil)))))

(defmacro c-clear-syn-tab-properties (from to)
  ;; Remove all occurrences of the `syntax-table' and `c-fl-syn-tab' text
  ;; properties between FROM and TO.
  `(let ((-from- ,from) (-to- ,to))
     (when (and
	    c-min-syn-tab-mkr c-max-syn-tab-mkr
	    (< -from- c-max-syn-tab-mkr)
	    (> -to- c-min-syn-tab-mkr))
       (let ((pos -from-))
	 (while (and
		 (< pos -to-)
		 (setq pos (c-min-property-position pos -to- 'c-fl-syn-tab))
		 (< pos -to-))
	   (c-clear-syn-tab pos)
	   (setq pos (1+ pos)))))
     (c-clear-char-properties -from- -to- 'syntax-table)))

(defmacro c-search-forward-char-property (property value &optional limit)
  "Search forward for a text-property PROPERTY having value VALUE.
LIMIT bounds the search.  The comparison is done with `equal'.

Leave point just after the character, and set the match data on
this character, and return point.  If VALUE isn't found, Return
nil; point is then left undefined."
  `(let ((place (point)))
     (while
	 (and
	  (< place ,(or limit '(point-max)))
	  (not (equal (c-get-char-property place ,property) ,value)))
       (setq place (c-next-single-property-change
		    place ,property nil ,(or limit '(point-max)))))
     (when (< place ,(or limit '(point-max)))
       (goto-char place)
       (search-forward-regexp "\\(\n\\|.\\)")	; to set the match-data.
       (point))))

(defmacro c-search-backward-char-property (property value &optional limit)
  "Search backward for a text-property PROPERTY having value VALUE.
LIMIT bounds the search.  The comparison is done with `equal'.

Leave point just before the character, set the match data on this
character, and return point.  If VALUE isn't found, Return nil;
point is then left undefined."
  `(let ((place (point)))
     (while
	 (and
	  (> place ,(or limit '(point-min)))
	  (not (equal (c-get-char-property (1- place) ,property) ,value)))
       (setq place (,(if (and c-use-extents
			      (fboundp 'previous-single-char-property-change))
			 ;; XEmacs > 2005-01-25.
			 'previous-single-char-property-change
		       ;; Emacs and earlier XEmacs.
		       'previous-single-property-change)
		    place ,property nil ,(or limit '(point-min)))))
     (when (> place ,(or limit '(point-min)))
       (goto-char place)
       (search-backward-regexp "\\(\n\\|.\\)")	; to set the match-data.
       (point))))

(defun c-clear-char-property-with-value-function (from to property value)
  "Remove all text-properties PROPERTY from the region (FROM, TO)
which have the value VALUE, as tested by `equal'.  These
properties are assumed to be over individual characters, having
been put there by c-put-char-property.  POINT remains unchanged."
  (let ((place from) end-place)
    (while			  ; loop round occurrences of (PROPERTY VALUE)
	(progn
	  (while	   ; loop round changes in PROPERTY till we find VALUE
	      (and
	       (< place to)
	       (not (equal (get-text-property place property) value)))
	    (setq place (c-next-single-property-change place property nil to)))
	  (< place to))
      (when (and (fboundp 'syntax-ppss) (eq property 'syntax-table))
	(setq c-syntax-table-hwm (min c-syntax-table-hwm place)))
      (setq end-place (c-next-single-property-change place property nil to))
      (remove-text-properties place end-place (list property nil))
      ;; Do we have to do anything with stickiness here?
      (setq place end-place))))

(defmacro c-clear-char-property-with-value (from to property value)
  "Remove all text-properties PROPERTY from the region [FROM, TO)
which have the value VALUE, as tested by `equal'.  These
properties are assumed to be over individual characters, having
been put there by c-put-char-property.  POINT remains unchanged."
  (if c-use-extents
    ;; XEmacs
      `(let ((-property- ,property))
	 (map-extents (lambda (ext val)
			(if (equal (extent-property ext -property-) val)
			    (delete-extent ext)))
		      nil ,from ,to ,value nil -property-))
    ;; GNU Emacs
    `(c-clear-char-property-with-value-function ,from ,to ,property ,value)))

(defmacro c-search-forward-char-property-with-value-on-char
    (property value char &optional limit)
  "Search forward for a text-property PROPERTY having value VALUE on a
character with value CHAR.
LIMIT bounds the search.  The value comparison is done with `equal'.
PROPERTY must be a constant.

Leave point just after the character, and set the match data on
this character, and return point.  If the search fails, return
nil; point is then left undefined."
  `(let ((char-skip (concat "^" (char-to-string ,char)))
	 (-limit- (or ,limit (point-max)))
	 (-value- ,value))
     (while
	 (and
	  (progn (skip-chars-forward char-skip -limit-)
		 (< (point) -limit-))
	  (not (equal (c-get-char-property (point) ,property) -value-)))
       (forward-char))
     (when (< (point) -limit-)
       (search-forward-regexp "\\(\n\\|.\\)")	; to set the match-data.
       (point))))

(defmacro c-search-backward-char-property-with-value-on-char
    (property value char &optional limit)
  "Search backward for a text-property PROPERTY having value VALUE on a
character with value CHAR.
LIMIT bounds the search.  The value comparison is done with `equal'.
PROPERTY must be a constant.

Leave point just before the character, and set the match data on
this character, and return point.  If the search fails, return
nil; point is then left undefined."
  `(let ((char-skip (concat "^" (char-to-string ,char)))
	 (-limit- (or ,limit (point-min)))
	 (-value- ,value))
     (while
	 (and
	  (progn (skip-chars-backward char-skip -limit-)
		 (> (point) -limit-))
	  (not (equal (c-get-char-property (1- (point)) ,property) -value-)))
       (backward-char))
     (when (> (point) -limit-)
       (search-backward-regexp "\\(\n\\|.\\)")	; to set the match-data.
       (point))))

(defmacro c-search-forward-char-property-without-value-on-char
    (property value char &optional limit)
  "Search forward for a character CHAR without text property PROPERTY having
a value CHAR.
LIMIT bounds the search.  The value comparison is done with `equal'.
PROPERTY must be a constant.

Leave point just after the character, and set the match data on
this character, and return point.  If the search fails, return
nil; point is then left undefined."
  `(let ((char-skip (concat "^" (char-to-string ,char)))
	 (-limit- (or ,limit (point-max)))
	 (-value- ,value))
     (while
	 (and
	  (progn (skip-chars-forward char-skip -limit-)
		 (< (point) -limit-))
	  (equal (c-get-char-property (point) ,property) -value-))
       (forward-char))
     (when (< (point) -limit-)
       (search-forward-regexp "\\(\n\\|.\\)")	; to set the match-data.
       (point))))

(defun c-clear-char-property-with-value-on-char-function (from to property
							       value char)
  "Remove all text-properties PROPERTY with value VALUE on
characters with value CHAR from the region [FROM, TO), as tested
by `equal'.  These properties are assumed to be over individual
characters, having been put there by c-put-char-property.  POINT
remains unchanged.  Return the position of the first removed
property, or nil."
  (let ((place from)
	first)
    (while			  ; loop round occurrences of (PROPERTY VALUE)
	(progn
	  (while	   ; loop round changes in PROPERTY till we find VALUE
	      (and
	       (< place to)
	       (not (equal (get-text-property place property) value)))
	    (setq place (c-next-single-property-change place property nil to)))
	  (< place to))
      (when (eq (char-after place) char)
	(remove-text-properties place (1+ place) (list property nil))
	(or first
	    (progn (setq first place)
		   (when (eq property 'syntax-table)
		     (setq c-syntax-table-hwm (min c-syntax-table-hwm place))))))
      ;; Do we have to do anything with stickiness here?
      (setq place (1+ place)))
    first))

(defmacro c-clear-char-property-with-value-on-char (from to property value char)
  "Remove all text-properties PROPERTY with value VALUE on
characters with value CHAR from the region [FROM, TO), as tested
by `equal'.  These properties are assumed to be over individual
characters, having been put there by c-put-char-property.  POINT
remains unchanged.  Return the position of the first removed
property, or nil."
  (if c-use-extents
      ;; XEmacs
      `(let ((-property- ,property)
	     (-char- ,char)
	     (first (1+ (point-max))))
	 (map-extents (lambda (ext val)
			(when (and (equal (extent-property ext -property-) val)
				   (eq (char-after
					(extent-start-position ext))
				       -char-))
			  (setq first (min first (extent-start-position ext)))
			  (delete-extent ext)))
		      nil ,from ,to ,value nil -property-)
	 (and (<= first (point-max)) first))
    ;; GNU Emacs
    `(c-clear-char-property-with-value-on-char-function ,from ,to ,property
							,value ,char)))

(defmacro c-put-char-properties-on-char (from to property value char)
  ;; This needs to be a macro because `property' passed to
  ;; `c-put-char-property' must be a constant.
  "Put the text property PROPERTY with value VALUE on characters
with value CHAR in the region [FROM to)."
  `(let ((skip-string (concat "^" (list ,char)))
	 (-to- ,to))
     (save-excursion
       (goto-char ,from)
       (while (progn (skip-chars-forward skip-string -to-)
		     (< (point) -to-))
	 ,@(when (and (fboundp 'syntax-ppss)
		      (eq (eval property) 'syntax-table))
	     `((setq c-syntax-table-hwm (min c-syntax-table-hwm (point)))))
	 (c-put-char-property (point) ,property ,value)
	 (forward-char)))))

\f
;; Macros to put overlays (Emacs) or extents (XEmacs) on buffer text.
;; For our purposes, these are characterized by being possible to
;; remove again without affecting the other text properties in the
;; buffer that got overridden when they were put.

(defmacro c-put-overlay (from to property value)
  ;; Put an overlay/extent covering the given range in the current
  ;; buffer.  It's currently undefined whether it's front/end sticky
  ;; or not.  The overlay/extent object is returned.
  (if (cc-bytecomp-fboundp 'make-overlay)
      ;; Emacs.
      `(let ((ol (make-overlay ,from ,to)))
	 (overlay-put ol ,property ,value)
	 ol)
    ;; XEmacs.
    `(let ((ext (make-extent ,from ,to)))
       (set-extent-property ext ,property ,value)
       ext)))

(defmacro c-delete-overlay (overlay)
  ;; Deletes an overlay/extent object previously retrieved using
  ;; `c-put-overlay'.
  (if (cc-bytecomp-fboundp 'make-overlay)
      ;; Emacs.
      `(delete-overlay ,overlay)
    ;; XEmacs.
    `(delete-extent ,overlay)))

\f
;; Make edebug understand the macros.
;(eval-after-load "edebug" ; 2006-07-09: def-edebug-spec is now in subr.el.
;  '(progn
(def-edebug-spec cc-eval-when-compile (&rest def-form))
(def-edebug-spec c-font-lock-flush t)
(def-edebug-spec c--mapcan t)
(def-edebug-spec c--set-difference (form form &rest [symbolp form]))
(def-edebug-spec c--intersection (form form &rest [symbolp form]))
(def-edebug-spec c--delete-duplicates (form &rest [symbolp form]))
(def-edebug-spec c-point t)
(def-edebug-spec c-is-escaped t)
(def-edebug-spec c-will-be-escaped t)
(def-edebug-spec c-next-single-property-change t)
(def-edebug-spec c-delete-and-extract-region t)
(def-edebug-spec c-set-region-active t)
(def-edebug-spec c-set-keymap-parent t)
(def-edebug-spec c-safe t)
(def-edebug-spec c-int-to-char t)
(def-edebug-spec c-characterp t)
(def-edebug-spec c-save-buffer-state let*)
(def-edebug-spec c-tentative-buffer-changes t)
(def-edebug-spec c-forward-syntactic-ws t)
(def-edebug-spec c-backward-syntactic-ws t)
(def-edebug-spec c-forward-sexp t)
(def-edebug-spec c-backward-sexp t)
(def-edebug-spec c-safe-scan-lists t)
(def-edebug-spec c-go-list-forward t)
(def-edebug-spec c-go-list-backward t)
(def-edebug-spec c-up-list-forward t)
(def-edebug-spec c-up-list-backward t)
(def-edebug-spec c-down-list-forward t)
(def-edebug-spec c-down-list-backward t)
(def-edebug-spec c-go-up-list-forward t)
(def-edebug-spec c-go-up-list-backward t)
(def-edebug-spec c-go-down-list-forward t)
(def-edebug-spec c-go-down-list-backward t)
(def-edebug-spec c-at-vsemi-p t)
(def-edebug-spec c-add-syntax t)
(def-edebug-spec c-add-class-syntax t)
(def-edebug-spec c-benign-error t)
(def-edebug-spec c-with-syntax-table t)
(def-edebug-spec c-skip-ws-forward t)
(def-edebug-spec c-skip-ws-backward t)
(def-edebug-spec c-major-mode-is t)
(def-edebug-spec c-search-forward-char-property t)
(def-edebug-spec c-search-backward-char-property t)
(def-edebug-spec c-put-char-property t)
(def-edebug-spec c-put-syn-tab t)
(def-edebug-spec c-get-char-property t)
(def-edebug-spec c-clear-char-property t)
(def-edebug-spec c-clear-syn-tab t)
;;(def-edebug-spec c-min-property-position nil) ; invoked only by macros
(def-edebug-spec c-min-property-position t) ; Now invoked from functions (2019-07)
(def-edebug-spec c-clear-char-property-with-value t)
(def-edebug-spec c-clear-char-property-with-value-on-char t)
(def-edebug-spec c-put-char-properties-on-char t)
(def-edebug-spec c-clear-char-properties t)
(def-edebug-spec c-clear-syn-tab-properties t)
(def-edebug-spec c-with-extended-string-fences (form form body))
(def-edebug-spec c-put-overlay t)
(def-edebug-spec c-delete-overlay t)
(def-edebug-spec c-mark-<-as-paren t)
(def-edebug-spec c-mark->-as-paren t)
(def-edebug-spec c-unmark-<->-as-paren t)
(def-edebug-spec c-with-<->-as-parens-suppressed (body))
(def-edebug-spec c-self-bind-state-cache (body))
(def-edebug-spec c-sc-scan-lists-no-category+1+1 t)
(def-edebug-spec c-sc-scan-lists-no-category+1-1 t)
(def-edebug-spec c-sc-scan-lists-no-category-1+1 t)
(def-edebug-spec c-sc-scan-lists-no-category-1-1 t)
(def-edebug-spec c-sc-scan-lists t)
(def-edebug-spec c-sc-parse-partial-sexp t);))

\f
;;; Functions.

;; Note: All these after the macros, to be on safe side in avoiding
;; bugs where macros are defined too late.  These bugs often only show
;; when the files are compiled in a certain order within the same
;; session.

(defsubst c-end-of-defun-1 ()
  ;; Replacement for end-of-defun that use c-beginning-of-defun-1.
  (let ((start (point)))
    ;; Skip forward into the next defun block. Don't bother to avoid
    ;; comments, literals etc, since beginning-of-defun doesn't do that
    ;; anyway.
    (skip-chars-forward "^}")
    (c-beginning-of-defun-1)
    (if (eq (char-after) ?{)
	(c-forward-sexp))
    (if (< (point) start)
	(goto-char (point-max)))))

(defmacro c-mark-<-as-paren (pos)
  ;; Mark the "<" character at POS as a template opener using the
  ;; `syntax-table' property either directly (XEmacs) or via a `category'
  ;; property (GNU Emacs).
  ;;
  ;; This function does a hidden buffer change.  Note that we use
  ;; indirection through the `category' text property.  This allows us to
  ;; toggle the property in all template brackets simultaneously and
  ;; cheaply.  We use this, for instance, in `c-parse-state'.
  (if c-use-category
      `(c-put-char-property ,pos 'category 'c-<-as-paren-syntax)
    `(c-put-char-property ,pos 'syntax-table c-<-as-paren-syntax)))


(defmacro c-mark->-as-paren (pos)
  ;; Mark the ">" character at POS as an sexp list closer using the
  ;; `syntax-table' property either directly (XEmacs) or via a `category'
  ;; property (GNU Emacs).
  ;;
  ;; This function does a hidden buffer change.  Note that we use
  ;; indirection through the `category' text property.  This allows us to
  ;; toggle the property in all template brackets simultaneously and
  ;; cheaply.  We use this, for instance, in `c-parse-state'.
  (if c-use-category
      `(c-put-char-property ,pos 'category 'c->-as-paren-syntax)
    `(c-put-char-property ,pos 'syntax-table c->-as-paren-syntax)))

(defmacro c-unmark-<->-as-paren (pos)
  ;; Unmark the "<" or "<" character at POS as an sexp list opener using the
  ;; `syntax-table' property either directly or indirectly through a
  ;; `category' text property.
  ;;
  ;; This function does a hidden buffer change.  Note that we try to use
  ;; indirection through the `category' text property.  This allows us to
  ;; toggle the property in all template brackets simultaneously and
  ;; cheaply.  We use this, for instance, in `c-parse-state'.
  `(c-clear-char-property ,pos ,(if c-use-category ''category ''syntax-table)))

(defsubst c-suppress-<->-as-parens ()
  ;; Suppress the syntactic effect of all marked < and > as parens.  Note
  ;; that this effect is NOT buffer local.  You should probably not use
  ;; this directly, but only through the macro
  ;; `c-with-<->-as-parens-suppressed'
  (put 'c-<-as-paren-syntax 'syntax-table nil)
  (put 'c->-as-paren-syntax 'syntax-table nil))

(defsubst c-restore-<->-as-parens ()
  ;; Restore the syntactic effect of all marked <s and >s as parens.  This
  ;; has no effect on unmarked <s and >s
  (put 'c-<-as-paren-syntax 'syntax-table c-<-as-paren-syntax)
  (put 'c->-as-paren-syntax 'syntax-table c->-as-paren-syntax))

(defmacro c-with-<->-as-parens-suppressed (&rest forms)
  ;; Like progn, except that the paren property is suppressed on all
  ;; template brackets whilst they are running.  This macro does a hidden
  ;; buffer change.
  `(unwind-protect
       (progn
	 (c-suppress-<->-as-parens)
	 ,@forms)
     (c-restore-<->-as-parens)))

;;;;;;;;;;;;;;;

(defmacro c-self-bind-state-cache (&rest forms)
  ;; Bind the state cache to itself and execute the FORMS.  Return the result
  ;; of the last FORM executed.  It is assumed that no buffer changes will
  ;; happen in FORMS, and no hidden buffer changes which could affect the
  ;; parsing will be made by FORMS.
  `(let* ((c-state-cache (copy-tree c-state-cache))
	  (c-state-cache-good-pos c-state-cache-good-pos)
	  ;(c-state-nonlit-pos-cache (copy-tree c-state-nonlit-pos-cache))
          ;(c-state-nonlit-pos-cache-limit c-state-nonlit-pos-cache-limit)
          ;(c-state-semi-nonlit-pos-cache (copy-tree c-state-semi-nonlit-pos-cache))
          ;(c-state-semi-nonlit-pos-cache-limit c-state-semi-nonlit-pos-cache)
	  (c-state-brace-pair-desert (copy-tree c-state-brace-pair-desert))
	  (c-state-point-min c-state-point-min)
	  (c-state-point-min-lit-type c-state-point-min-lit-type)
	  (c-state-point-min-lit-start c-state-point-min-lit-start)
	  (c-state-min-scan-pos c-state-min-scan-pos)
	  (c-state-old-cpp-beg-marker (if (markerp c-state-old-cpp-beg-marker)
					  (copy-marker c-state-old-cpp-beg-marker)
					c-state-old-cpp-beg-marker))
	  (c-state-old-cpp-beg (if (markerp c-state-old-cpp-beg)
				   c-state-old-cpp-beg-marker
				 c-state-old-cpp-beg))
	  (c-state-old-cpp-end-marker (if (markerp c-state-old-cpp-end-marker)
					  (copy-marker c-state-old-cpp-end-marker)
					c-state-old-cpp-end-marker))
	  (c-state-old-cpp-end (if (markerp c-state-old-cpp-end)
				   c-state-old-cpp-end-marker
				 c-state-old-cpp-end))
	  (c-parse-state-state c-parse-state-state))
     (prog1
	 (progn ,@forms)
       (if (markerp c-state-old-cpp-beg-marker)
	   (move-marker c-state-old-cpp-beg-marker nil))
       (if (markerp c-state-old-cpp-end-marker)
	   (move-marker c-state-old-cpp-end-marker nil)))))

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; The following macros are to be used only in `c-parse-state' and its
;; subroutines.  Their main purpose is to simplify the handling of C++/Java
;; template delimiters and CPP macros.  In GNU Emacs, this is done slickly by
;; the judicious use of 'category properties.  These don't exist in XEmacs.
;;
;; Note: in the following macros, there is no special handling for parentheses
;; inside CPP constructs.  That is because CPPs are always syntactically
;; balanced, thanks to `c-neutralize-CPP-line' in cc-mode.el.
(defmacro c-sc-scan-lists-no-category+1+1 (from)
  ;; Do a (scan-lists FROM 1 1).  Any finishing position which either (i) is
  ;; determined by and angle bracket; or (ii) is inside a macro whose start
  ;; isn't POINT-MACRO-START doesn't count as a finishing position.
  `(let ((here (point))
	 (pos (scan-lists ,from 1 1)))
     (while (eq (char-before pos) ?>)
       (setq pos (scan-lists pos 1 1)))
     pos))

(defmacro c-sc-scan-lists-no-category+1-1 (from)
  ;; Do a (scan-lists FROM 1 -1).  Any finishing position which either (i) is
  ;; determined by an angle bracket; or (ii) is inside a macro whose start
  ;; isn't POINT-MACRO-START doesn't count as a finishing position.
  `(let ((here (point))
	 (pos (scan-lists ,from 1 -1)))
     (while (eq (char-before pos) ?<)
       (setq pos (scan-lists pos 1 1))
       (setq pos (scan-lists pos 1 -1)))
     pos))

(defmacro c-sc-scan-lists-no-category-1+1 (from)
  ;; Do a (scan-lists FROM -1 1).  Any finishing position which either (i) is
  ;; determined by and angle bracket; or (ii) is inside a macro whose start
  ;; isn't POINT-MACRO-START doesn't count as a finishing position.
  `(let ((here (point))
	 (pos (scan-lists ,from -1 1)))
     (while (eq (char-after pos) ?<)
       (setq pos (scan-lists pos -1 1)))
     pos))

(defmacro c-sc-scan-lists-no-category-1-1 (from)
  ;; Do a (scan-lists FROM -1 -1).  Any finishing position which either (i) is
  ;; determined by and angle bracket; or (ii) is inside a macro whose start
  ;; isn't POINT-MACRO-START doesn't count as a finishing position.
  `(let ((here (point))
	 (pos (scan-lists ,from -1 -1)))
     (while (eq (char-after pos) ?>)
       (setq pos (scan-lists pos -1 1))
       (setq pos (scan-lists pos -1 -1)))
     pos))

(defmacro c-sc-scan-lists (from count depth)
  (if c-use-category
      `(scan-lists ,from ,count ,depth)
    (cond
     ((and (eq count 1) (eq depth 1))
      `(c-sc-scan-lists-no-category+1+1 ,from))
     ((and (eq count 1) (eq depth -1))
      `(c-sc-scan-lists-no-category+1-1 ,from))
     ((and (eq count -1) (eq depth 1))
      `(c-sc-scan-lists-no-category-1+1 ,from))
     ((and (eq count -1) (eq depth -1))
      `(c-sc-scan-lists-no-category-1-1 ,from))
     (t (error "Invalid parameter(s) to c-sc-scan-lists")))))


(defun c-sc-parse-partial-sexp-no-category (from to targetdepth stopbefore
						 oldstate)
  ;; Do a parse-partial-sexp using the supplied arguments, disregarding
  ;; template/generic delimiters < > and disregarding macros other than the
  ;; one at POINT-MACRO-START.
  ;;
  ;; NOTE that STOPBEFORE must be nil.  TARGETDEPTH should be one less than
  ;; the depth in OLDSTATE.  This function is thus a SPECIAL PURPOSE variation
  ;; on parse-partial-sexp, designed for calling from
  ;; `c-remove-stale-state-cache'.
  ;;
  ;; Any finishing position which is determined by an angle bracket delimiter
  ;; doesn't count as a finishing position.
  ;;
  ;; Note there is no special handling of CPP constructs here, since these are
  ;; always syntactically balanced (thanks to `c-neutralize-CPP-line').
  (let ((state
	 (parse-partial-sexp from to targetdepth stopbefore oldstate)))
    (while
	(and (< (point) to)
	     ;; We must have hit targetdepth.
	     (or (eq (char-before) ?<)
		 (eq (char-before) ?>)))
      (setcar state
	      (if (memq (char-before) '(?> ?\) ?\} ?\]))
		  (1+ (car state))
		(1- (car state))))
      (setq state
	    (parse-partial-sexp (point) to targetdepth stopbefore oldstate)))
    state))

(defmacro c-sc-parse-partial-sexp (from to &optional targetdepth stopbefore
					oldstate)
  (if c-use-category
      `(parse-partial-sexp ,from ,to ,targetdepth ,stopbefore ,oldstate)
    `(c-sc-parse-partial-sexp-no-category ,from ,to ,targetdepth ,stopbefore
					  ,oldstate)))

\f
(defvar c-emacs-features)

(defmacro c-looking-at-non-alphnumspace ()
  "Are we looking at a character which isn't alphanumeric or space?"
  (if (memq 'gen-comment-delim c-emacs-features)
      '(looking-at
	"\\([;#]\\|\\'\\|\\s(\\|\\s)\\|\\s\"\\|\\s\\\\|\\s$\\|\\s<\\|\\s>\\|\\s!\\)")
    '(or (looking-at
	  "\\([;#]\\|\\'\\|\\s(\\|\\s)\\|\\s\"\\|\\s\\\\|\\s$\\|\\s<\\|\\s>\\)"
	  (let ((prop (c-get-char-property (point) 'syntax-table)))
	    (eq prop '(14)))))))		; '(14) is generic comment delimiter.

\f
(defsubst c-intersect-lists (list alist)
  ;; return the element of ALIST that matches the first element found
  ;; in LIST.  Uses assq.
  (let (match)
    (while (and list
		(not (setq match (assq (car list) alist))))
      (setq list (cdr list)))
    match))

(defsubst c-lookup-lists (list alist1 alist2)
  ;; first, find the first entry from LIST that is present in ALIST1,
  ;; then find the entry in ALIST2 for that entry.
  (assq (car (c-intersect-lists list alist1)) alist2))

(defsubst c-langelem-sym (langelem)
  "Return the syntactic symbol in LANGELEM.

LANGELEM is either a cons cell on the \"old\" form given as the first
argument to lineup functions or a syntactic element on the \"new\"
form as used in `c-syntactic-element'."
  (car langelem))

(defsubst c-langelem-pos (langelem)
  "Return the anchor position in LANGELEM, or nil if there is none.

LANGELEM is either a cons cell on the \"old\" form given as the first
argument to lineup functions or a syntactic element on the \"new\"
form as used in `c-syntactic-element'."
  (if (consp (cdr langelem))
      (car-safe (cdr langelem))
    (cdr langelem)))

(defun c-langelem-col (langelem &optional preserve-point)
  "Return the column of the anchor position in LANGELEM.
Also move the point to that position unless PRESERVE-POINT is non-nil.

LANGELEM is either a cons cell on the \"old\" form given as the first
argument to lineup functions or a syntactic element on the \"new\"
form as used in `c-syntactic-element'."
  (let ((pos (c-langelem-pos langelem))
	(here (point)))
    (if pos
	(progn
	  (goto-char pos)
	  (prog1 (current-column)
	    (if preserve-point
		(goto-char here))))
      0)))

(defsubst c-langelem-2nd-pos (langelem)
  "Return the secondary position in LANGELEM, or nil if there is none.

LANGELEM is typically a syntactic element on the \"new\" form as used
in `c-syntactic-element'.  It may also be a cons cell as passed in the
first argument to lineup functions, but then the returned value always
will be nil."
  (car-safe (cdr-safe (cdr-safe langelem))))

(defsubst c-keep-region-active ()
  ;; Do whatever is necessary to keep the region active in XEmacs.
  ;; This is not needed for Emacs.
  (and (boundp 'zmacs-region-stays)
       (setq zmacs-region-stays t)))

(put 'c-mode      'c-mode-prefix "c-")
(put 'c++-mode    'c-mode-prefix "c++-")
(put 'objc-mode   'c-mode-prefix "objc-")
(put 'csharp-mode 'c-mode-prefix "csharp-")
(put 'java-mode   'c-mode-prefix "java-")
(put 'idl-mode    'c-mode-prefix "idl-")
(put 'pike-mode   'c-mode-prefix "pike-")
(put 'awk-mode    'c-mode-prefix "awk-")

(defsubst c-mode-symbol (suffix)
  "Prefix the current mode prefix (e.g. \"c-\") to SUFFIX and return
the corresponding symbol."
  (or c-buffer-is-cc-mode
      (error "Not inside a CC Mode based mode"))
  (let ((mode-prefix (get c-buffer-is-cc-mode 'c-mode-prefix)))
    (or mode-prefix
	(error "%S has no mode prefix known to `c-mode-symbol'"
	       c-buffer-is-cc-mode))
    (intern (concat mode-prefix suffix))))

(defsubst c-mode-var (suffix)
  "Prefix the current mode prefix (e.g. \"c-\") to SUFFIX and return
the value of the variable with that name."
  (symbol-value (c-mode-symbol suffix)))

(defsubst c-got-face-at (pos faces)
  "Return non-nil if position POS in the current buffer has any of the
faces in the list FACES."
  (let ((pos-faces (get-text-property pos 'face)))
    (if (consp pos-faces)
	(progn
	  (while (and pos-faces
		      (not (memq (car pos-faces) faces)))
	    (setq pos-faces (cdr pos-faces)))
	  pos-faces)
      (memq pos-faces faces))))

(defsubst c-face-name-p (facename)
  ;; Return t if FACENAME is the name of a face.  This method is
  ;; necessary since facep in XEmacs only returns t for the actual
  ;; face objects (while it's only their names that are used just
  ;; about anywhere else) without providing a predicate that tests
  ;; face names.
  (memq facename (face-list)))

(defun c-concat-separated (list separator)
  "Like `concat' on LIST, but separate each element with SEPARATOR.
Notably, null elements in LIST are ignored."
  (mapconcat 'identity (delete nil (append list nil)) separator))

(defun c-make-keywords-re (adorn list &optional mode)
  "Make a regexp that matches all the strings the list.
Duplicates and nil elements in the list are removed.  The
resulting regexp may contain zero or more submatch expressions.

If ADORN is t there will be at least one submatch and the first
surrounds the matched alternative, and the regexp will also not match
a prefix of any identifier.  Adorned regexps cannot be appended.  The
language variable `c-nonsymbol-key' is used to make the adornment.

A value `appendable' for ADORN is like above, but all alternatives in
the list that end with a word constituent char will have \\> appended
instead, so that the regexp remains appendable.  Note that this
variant doesn't always guarantee that an identifier prefix isn't
matched since the symbol constituent `_' is normally considered a
nonword token by \\>.

The optional MODE specifies the language to get `c-nonsymbol-key' from
when it's needed.  The default is the current language taken from
`c-buffer-is-cc-mode'."

  (setq list (delete nil (delete-dups list)))
  (if list
      (let (re)

	(if (eq adorn 'appendable)
	    ;; This is kludgy but it works: Search for a string that
	    ;; doesn't occur in any word in LIST.  Append it to all
	    ;; the alternatives where we want to add \>.  Run through
	    ;; `regexp-opt' and then replace it with \>.
	    (let ((unique "") pos)
	      (while (let (found)
		       (setq unique (concat unique "@")
			     pos list)
		       (while (and pos
				   (if (string-match unique (car pos))
				       (progn (setq found t)
					      nil)
				     t))
			 (setq pos (cdr pos)))
		       found))
	      (setq pos (copy-tree list)
		    )
	      (while pos
		(if (string-match "\\w\\'" (car pos))
		    (setcar pos (concat (car pos) unique)))
		(setq pos (cdr pos)))
	      (setq re (regexp-opt list))
	      (setq pos 0)
	      (while (string-match unique re pos)
		(setq pos (+ (match-beginning 0) 2)
		      re (replace-match "\\>" t t re))))

	  (setq re (regexp-opt list)))

	;; Emacs 20 and XEmacs (all versions so far) has a buggy
	;; regexp-opt that doesn't always cope with strings containing
	;; newlines.  This kludge doesn't handle shy parens correctly
	;; so we can't advice regexp-opt directly with it.
	(let (fail-list)
	  (while list
	    (and (string-match "\n" (car list)) ; To speed it up a little.
		 (not (string-match (concat "\\`\\(" re "\\)\\'")
				    (car list)))
		 (setq fail-list (cons (car list) fail-list)))
	    (setq list (cdr list)))
	  (when fail-list
	    (setq re (concat re
			     "\\|"
			     (mapconcat
			      (if (eq adorn 'appendable)
				  (lambda (str)
				    (if (string-match "\\w\\'" str)
					(concat (regexp-quote str)
						"\\>")
				      (regexp-quote str)))
				'regexp-quote)
			      (sort fail-list
				    (lambda (a b)
				      (> (length a) (length b))))
			      "\\|")))))

	;; Add our own grouping parenthesis around re instead of
	;; passing adorn to `regexp-opt', since in XEmacs it makes the
	;; top level grouping "shy".
	(cond ((eq adorn 'appendable)
	       (concat "\\(" re "\\)"))
	      (adorn
	       (concat "\\(" re "\\)"
		       "\\("
		       (c-get-lang-constant 'c-nonsymbol-key nil mode)
		       "\\|$\\)"))
	      (t
	       re)))

    ;; Produce a regexp that doesn't match anything.
    (if adorn
	(concat "\\(" regexp-unmatchable "\\)")
      regexp-unmatchable)))

(put 'c-make-keywords-re 'lisp-indent-function 1)

(defun c-make-bare-char-alt (chars &optional inverted)
  "Make a character alternative string from the list of characters CHARS.
The returned string is of the type that can be used with
`skip-chars-forward' and `skip-chars-backward'.  If INVERTED is
non-nil, a caret is prepended to invert the set."
  ;; This function ought to be in the elisp core somewhere.
  (let ((str (if inverted "^" "")) char char2)
    (setq chars (sort (append chars nil) #'<))
    (while chars
      (setq char (pop chars))
      (if (memq char '(?\\ ?^ ?-))
	  ;; Quoting necessary (this method only works in the skip
	  ;; functions).
	  (setq str (format "%s\\%c" str char))
	(setq str (format "%s%c" str char)))
      ;; Check for range.
      (setq char2 char)
      (while (and chars (>= (1+ char2) (car chars)))
	(setq char2 (pop chars)))
      (unless (= char char2)
	(if (< (1+ char) char2)
	    (setq str (format "%s-%c" str char2))
	  (push char2 chars))))
    str))

;; Leftovers from (X)Emacs 19 compatibility.
(defalias 'c-regexp-opt 'regexp-opt)
(defalias 'c-regexp-opt-depth 'regexp-opt-depth)

\f
;; Figure out what features this Emacs has

(cc-bytecomp-defvar open-paren-in-column-0-is-defun-start)

(defconst c-emacs-features
  (let (list)

    (if (boundp 'infodock-version)
	;; I've no idea what this actually is, but it's legacy. /mast
	(setq list (cons 'infodock list)))

    ;; XEmacs uses 8-bit modify-syntax-entry flags.
    ;; Emacs uses a 1-bit flag.  We will have to set up our
    ;; syntax tables differently to handle this.
    (let ((table (copy-syntax-table))
	  entry)
      (modify-syntax-entry ?a ". 12345678" table)
      (cond
       ;; Emacs
       ((arrayp table)
	(setq entry (aref table ?a))
	;; In Emacs, table entries are cons cells
	(if (consp entry) (setq entry (car entry))))
       ;; XEmacs
       ((fboundp 'get-char-table)
	(setq entry (get-char-table ?a table)))
       ;; incompatible
       (t (error "CC Mode is incompatible with this version of Emacs")))
      (setq list (cons (if (= (logand (ash entry -16) 255) 255)
			   '8-bit
			 '1-bit)
		       list)))

    ;; Check whether beginning/end-of-defun call
    ;; beginning/end-of-defun-function nicely, passing through the
    ;; argument and respecting the return code.
    (let* (mark-ring
	   (bod-param 'foo) (eod-param 'foo)
	   (beginning-of-defun-function
	    (lambda (&optional arg)
	      (or (eq bod-param 'foo) (setq bod-param 'bar))
	      (and (eq bod-param 'foo)
		   (setq bod-param arg)
		   (eq arg 3))))
	   (end-of-defun-function
	    (lambda (&optional arg)
	      (and (eq eod-param 'foo)
		   (setq eod-param arg)
		   (eq arg 3)))))
      (if (save-excursion (and (beginning-of-defun 3) (eq bod-param 3)
			       (not (beginning-of-defun))
			       (end-of-defun 3) (eq eod-param 3)
			       (not (end-of-defun))))
	  (setq list (cons 'argumentative-bod-function list))))

    ;; Record whether the `category' text property works.
    (if c-use-category (setq list (cons 'category-properties list)))

    (let ((buf (generate-new-buffer " test"))
	  parse-sexp-lookup-properties
	  parse-sexp-ignore-comments
	  lookup-syntax-properties)	; XEmacs
      (with-current-buffer buf
	(set-syntax-table (make-syntax-table))

	;; For some reason we have to set some of these after the
	;; buffer has been made current.  (Specifically,
	;; `parse-sexp-ignore-comments' in Emacs 21.)
	(setq parse-sexp-lookup-properties t
	      parse-sexp-ignore-comments t
	      lookup-syntax-properties t)

	;; Find out if the `syntax-table' text property works.
	(modify-syntax-entry ?< ".")
	(modify-syntax-entry ?> ".")
	(insert "<()>")
	(c-mark-<-as-paren (point-min))
	(c-mark->-as-paren (+ 3 (point-min)))
	(goto-char (point-min))
	(c-forward-sexp)
	(if (= (point) (+ 4 (point-min)))
	    (setq list (cons 'syntax-properties list))
	  (error (concat
		  "CC Mode is incompatible with this version of Emacs - "
		  "support for the `syntax-table' text property "
		  "is required.")))

	;; Find out if "\\s!" (generic comment delimiters) work.
	(c-safe
	  (modify-syntax-entry ?x "!")
	  (if (string-match "\\s!" "x")
	      (setq list (cons 'gen-comment-delim list))))

	;; Find out if "\\s|" (generic string delimiters) work.
	(c-safe
	  (modify-syntax-entry ?x "|")
	  (if (string-match "\\s|" "x")
	      (setq list (cons 'gen-string-delim list))))

	;; See if POSIX char classes work.
	(when (and (string-match "[[:alpha:]]" "a")
		   ;; All versions of Emacs 21 so far haven't fixed
		   ;; char classes in `skip-chars-forward' and
		   ;; `skip-chars-backward'.
		   (progn
		     (delete-region (point-min) (point-max))
		     (insert "foo123")
		     (skip-chars-backward "[:alnum:]")
		     (bobp))
		   (= (skip-chars-forward "[:alpha:]") 3))
	  (setq list (cons 'posix-char-classes list)))

	;; See if `open-paren-in-column-0-is-defun-start' exists and
	;; isn't buggy (Emacs >= 21.4).
	(when (boundp 'open-paren-in-column-0-is-defun-start)
	  (let ((open-paren-in-column-0-is-defun-start nil)
		(parse-sexp-ignore-comments t))
	    (delete-region (point-min) (point-max))
	    (set-syntax-table (make-syntax-table))
	    (modify-syntax-entry ?\' "\"")
	    (cond
	     ;; XEmacs.  Afaik this is currently an Emacs-only
	     ;; feature, but it's good to be prepared.
	     ((memq '8-bit list)
	      (modify-syntax-entry ?/ ". 1456")
	      (modify-syntax-entry ?* ". 23"))
	     ;; Emacs
	     ((memq '1-bit list)
	      (modify-syntax-entry ?/ ". 124b")
	      (modify-syntax-entry ?* ". 23")))
	    (modify-syntax-entry ?\n "> b")
	    (insert "/* '\n   () */")
	    (backward-sexp)
	    (if (bobp)
		(setq list (cons 'col-0-paren list)))))

	(set-buffer-modified-p nil))
      (kill-buffer buf))

    ;; Check how many elements `parse-partial-sexp' returns.
    (let ((ppss-size (or (c-safe (length
				  (save-excursion
				    (parse-partial-sexp (point) (point)))))
			 0)))
      (cond
       ((>= ppss-size 11) (setq list (cons 'pps-extended-state list)))
       ((>= ppss-size 10))
       (t (error
	   (concat
	    "CC Mode is incompatible with this version of Emacs - "
	    "`parse-partial-sexp' has to return at least 10 elements.")))))

    ;;(message "c-emacs-features: %S" list)
    list)
  "A list of certain features in the (X)Emacs you are using.
There are many flavors of Emacs out there, each with different
features supporting those needed by CC Mode.  The following values
might be present:

`8-bit'             8 bit syntax entry flags (XEmacs style).
`1-bit'             1 bit syntax entry flags (Emacs style).
`argumentative-bod-function'    beginning-of-defun and end-of-defun pass
		    ARG through to beginning/end-of-defun-function.
`syntax-properties' It works to override the syntax for specific characters
		    in the buffer with the `syntax-table' property.  It's
		    always set - CC Mode no longer works in emacsen without
		    this feature.
`category-properties' Syntax routines can add a level of indirection to text
		    properties using the `category' property.
`gen-comment-delim' Generic comment delimiters work
		    (i.e. the syntax class `!').
`gen-string-delim'  Generic string delimiters work
		    (i.e. the syntax class `|').
`pps-extended-state' `parse-partial-sexp' returns a list with at least 11
		    elements, i.e. it indicates having stopped after the
		    first character of a potential two-char construct.
`posix-char-classes' The regexp engine understands POSIX character classes.
`col-0-paren'       It's possible to turn off the ad-hoc rule that a paren
		    in column zero is the start of a defun.
`infodock'           This is Infodock (based on XEmacs).

`8-bit' and `1-bit' are mutually exclusive.")

\f
;;; Some helper constants.

;; If the regexp engine supports POSIX char classes then we can use
;; them to handle extended charsets correctly.
(if (memq 'posix-char-classes c-emacs-features)
    (progn
      (defconst c-alpha "[:alpha:]")
      (defconst c-alnum "[:alnum:]")
      (defconst c-digit "[:digit:]")
      (defconst c-upper "[:upper:]")
      (defconst c-lower "[:lower:]"))
  (defconst c-alpha "a-zA-Z")
  (defconst c-alnum "a-zA-Z0-9")
  (defconst c-digit "0-9")
  (defconst c-upper "A-Z")
  (defconst c-lower "a-z"))

\f
;;; System for handling language dependent constants.

;; This is used to set various language dependent data in a flexible
;; way: Language constants can be built from the values of other
;; language constants, also those for other languages.  They can also
;; process the values of other language constants uniformly across all
;; the languages.  E.g. one language constant can list all the type
;; keywords in each language, and another can build a regexp for each
;; language from those lists without code duplication.
;;
;; Language constants are defined with `c-lang-defconst', and their
;; value forms (referred to as source definitions) are evaluated only
;; on demand when requested for a particular language with
;; `c-lang-const'.  It's therefore possible to refer to the values of
;; constants defined later in the file, or in another file, just as
;; long as all the relevant `c-lang-defconst' have been loaded when
;; `c-lang-const' is actually evaluated from somewhere else.
;;
;; `c-lang-const' forms are also evaluated at compile time and
;; replaced with the values they produce.  Thus there's no overhead
;; for this system when compiled code is used - only the values
;; actually used in the code are present, and the file(s) containing
;; the `c-lang-defconst' forms don't need to be loaded at all then.
;; There are however safeguards to make sure that they can be loaded
;; to get the source definitions for the values if there's a mismatch
;; in compiled versions, or if `c-lang-const' is used uncompiled.
;;
;; Note that the source definitions in a `c-lang-defconst' form are
;; compiled into the .elc file where it stands; there's no need to
;; load the source file to get it.
;;
;; See cc-langs.el for more details about how this system is deployed
;; in CC Mode, and how the associated language variable system
;; (`c-lang-defvar') works.  That file also contains a lot of
;; examples.

(defun c-add-language (mode base-mode)
  "Declare a new language in the language dependent variable system.
This is intended to be used by modes that inherit CC Mode to add new
languages.  It should be used at the top level before any calls to
`c-lang-defconst'.  MODE is the mode name symbol for the new language,
and BASE-MODE is the mode name symbol for the language in CC Mode that
is to be the template for the new mode.

The exact effect of BASE-MODE is to make all language constants that
haven't got a setting in the new language fall back to their values in
BASE-MODE.  It does not have any effect outside the language constant
system."
  (unless (string-match "\\`\\(.*-\\)mode\\'" (symbol-name mode))
    (error "The mode name symbol `%s' must end with \"-mode\"" mode))
  (put mode 'c-mode-prefix (match-string 1 (symbol-name mode)))
  (unless (get base-mode 'c-mode-prefix)
    (error "Unknown base mode `%s'" base-mode))
  (put mode 'c-fallback-mode base-mode))

(defvar c-lang-constants (make-vector 151 0))
;;   Obarray used as a cache to keep track of the language constants.
;; The constants stored are those defined by `c-lang-defconst' and the values
;; computed by `c-lang-const'.  It's mostly used at compile time but it's not
;; stored in compiled files.

;; The obarray contains all the language constants as symbols.  The
;; value cells hold the evaluated values as alists where each car is
;; the mode name symbol and the corresponding cdr is the evaluated
;; value in that mode.  The property lists hold the source definitions
;; and other miscellaneous data.  The obarray might also contain
;; various other symbols, but those don't have any variable bindings.

(defvar c-lang-const-expansion nil)

;; Ugly hack to pull in the definition of `cc-bytecomp-compiling-or-loading'
;; from cc-bytecomp to make it available at loadtime.  This is the same
;; mechanism used in cc-mode.el for `c-populate-syntax-table'.
(defalias 'cc-bytecomp-compiling-or-loading
  (cc-eval-when-compile
    (let ((f (symbol-function 'cc-bytecomp-compiling-or-loading)))
      (if (byte-code-function-p f) f (byte-compile f)))))

(defsubst c-get-current-file ()
  ;; Return the base name of the current file.
  (let* ((c-or-l (cc-bytecomp-compiling-or-loading))
	 (file
	  (cond
	   ((eq c-or-l 'loading) load-file-name)
	   ((eq c-or-l 'compiling) byte-compile-dest-file)
	   ((null c-or-l) (buffer-file-name)))))
    (and file
	 (file-name-sans-extension
	  (file-name-nondirectory file)))))

(defmacro c-lang-defconst-eval-immediately (form)
  "Can be used inside a VAL in `c-lang-defconst' to evaluate FORM
immediately, i.e. at the same time as the `c-lang-defconst' form
itself is evaluated."
  ;; Evaluate at macro expansion time, i.e. in the
  ;; `c--macroexpand-all' inside `c-lang-defconst'.
  (eval form))

(defmacro c-lang-defconst (name &rest args)
  "Set the language specific values of the language constant NAME.
The second argument can optionally be a docstring.  The rest of the
arguments are one or more repetitions of LANG VAL where LANG specifies
the language(s) that VAL applies to.  LANG is the name of the
language, i.e. the mode name without the \"-mode\" suffix, or a list
of such language names, or t for all languages.  VAL is a form to
evaluate to get the value.

If LANG isn't t or one of the core languages in CC Mode, it must
have been declared with `c-add-language'.

Neither NAME, LANG nor VAL are evaluated directly - they should not be
quoted.  `c-lang-defconst-eval-immediately' can however be used inside
VAL to evaluate parts of it directly.

When VAL is evaluated for some language, that language is temporarily
made current so that `c-lang-const' without an explicit language can
be used inside VAL to refer to the value of a language constant in the
same language.  That is particularly useful if LANG is t.

VAL is not evaluated right away but rather when the value is requested
with `c-lang-const'.  Thus it's possible to use `c-lang-const' inside
VAL to refer to language constants that haven't been defined yet.
However, if the definition of a language constant is in another file
then that file must be loaded (at compile time) before it's safe to
reference the constant.

The assignments in ARGS are processed in sequence like `setq', so
\(c-lang-const NAME) may be used inside a VAL to refer to the last
assigned value to this language constant, or a value that it has
gotten in another earlier loaded file.

To work well with repeated loads and interactive reevaluation, only
one `c-lang-defconst' for each NAME is permitted per file.  If there
already is one it will be completely replaced; the value in the
earlier definition will not affect `c-lang-const' on the same
constant.  A file is identified by its base name."

  (let* ((sym (intern (symbol-name name) c-lang-constants))
	 ;; Make `c-lang-const' expand to a straightforward call to
	 ;; `c-get-lang-constant' in `c--macroexpand-all' below.
	 ;;
	 ;; (The default behavior, i.e. to expand to a call inside
	 ;; `eval-when-compile' should be equivalent, since that macro
	 ;; should only expand to its content if it's used inside a
	 ;; form that's already evaluated at compile time.  It's
	 ;; however necessary to use our cover macro
	 ;; `cc-eval-when-compile' due to bugs in `eval-when-compile',
	 ;; and it expands to a bulkier form that in this case only is
	 ;; unnecessary garbage that we don't want to store in the
	 ;; language constant source definitions.)
	 (c-lang-const-expansion 'call)
	 (c-langs-are-parametric t)
	 (file (intern
		(or (c-get-current-file)
		    (error "`c-lang-defconst' can only be used in a file"))))
	 bindings
	 pre-files)

    (or (symbolp name)
	(error "Not a symbol: %S" name))

    (when (stringp (car-safe args))
      ;; The docstring is hardly used anywhere since there's no normal
      ;; symbol to attach it to.  It's primarily for getting the right
      ;; format in the source.
      (put sym 'variable-documentation (car args))
      (setq args (cdr args)))

    (or args
	(error "No assignments in `c-lang-defconst' for %S" name))

    ;; Rework ARGS to an association list to make it easier to handle.
    ;; It's reversed at the same time to make it easier to implement
    ;; the demand-driven (i.e. reversed) evaluation in `c-lang-const'.
    (while args
      (let ((assigned-mode
	     (cond ((eq (car args) t) t)
		   ((symbolp (car args))
		    (list (intern (concat (symbol-name (car args))
					  "-mode"))))
		   ((listp (car args))
		    (mapcar (lambda (lang)
			      (or (symbolp lang)
				  (error "Not a list of symbols: %S"
					 (car args)))
			      (intern (concat (symbol-name lang)
					      "-mode")))
			    (car args)))
		   (t (error "Not a symbol or a list of symbols: %S"
			     (car args)))))
	    val)

	(or (cdr args)
	    (error "No value for %S" (car args)))
	(setq args (cdr args)
	      val (car args))

	;; Emacs has a weird bug where it seems to fail to read
	;; backquote lists from byte compiled files correctly (,@
	;; forms, to be specific), so make sure the bindings in the
	;; expansion below don't contain any backquote stuff.
	;; (XEmacs handles it correctly and doesn't need this for that
	;; reason, but we also use this expansion handle
	;; `c-lang-defconst-eval-immediately' and to register
	;; dependencies on the `c-lang-const's in VAL.)
	(setq val (c--macroexpand-all val))

	(setq bindings `(cons (cons ',assigned-mode (lambda () ,val)) ,bindings)
	      args (cdr args))))

    ;; Compile in the other files that have provided source
    ;; definitions for this symbol, to make sure the order in the
    ;; `source' property is correct even when files are loaded out of
    ;; order.
    (setq pre-files (mapcar 'car (get sym 'source)))
    (if (memq file pre-files)
	;; This can happen when the source file (e.g. cc-langs.el) is first
	;; loaded as source, setting a 'source property entry, and then itself
	;; being compiled.
	(setq pre-files (cdr (memq file pre-files))))
    ;; Reverse to get the right load order.
    (setq pre-files (nreverse pre-files))

    `(eval-and-compile
       (c-define-lang-constant ',name ,bindings
			       ,@(and pre-files `(',pre-files))))))

(put 'c-lang-defconst 'lisp-indent-function 1)
;(eval-after-load "edebug" ; 2006-07-09: def-edebug-spec is now in subr.el.
;  '
(def-edebug-spec c-lang-defconst
  (&define name [&optional stringp] [&rest sexp def-form]))

(defun c-define-lang-constant (name bindings &optional pre-files)
  ;; Used by `c-lang-defconst'.

  (let* ((sym (intern (symbol-name name) c-lang-constants))
	 (source (get sym 'source))
	 (file (intern
		(or (c-get-current-file)
		    (error "`c-lang-defconst' must be used in a file"))))
	 (elem (assq file source)))

    ;;(when (cdr-safe elem)
    ;;  (message "Language constant %s redefined in %S" name file))

    ;; Note that the order in the source alist is relevant.  Like how
    ;; `c-lang-defconst' reverses the bindings, this reverses the
    ;; order between files so that the last to evaluate comes first.
    (unless elem
      (while pre-files
	(unless (assq (car pre-files) source)
	  (setq source (cons (list (car pre-files)) source)))
	(setq pre-files (cdr pre-files)))
      (put sym 'source (cons (setq elem (list file)) source)))

    (setcdr elem bindings)

    ;; Bind the symbol as a variable, or clear any earlier evaluated
    ;; value it has.
    (set sym nil)

    ;; Clear the evaluated values that depend on this source.
    (let ((agenda (get sym 'dependents))
	  (visited (make-vector 101 0))
	  ptr)
      (while agenda
	(setq sym (car agenda)
	      agenda (cdr agenda))
	(intern (symbol-name sym) visited)
	(set sym nil)
	(setq ptr (get sym 'dependents))
	(while ptr
	  (setq sym (car ptr)
		ptr (cdr ptr))
	  (unless (intern-soft (symbol-name sym) visited)
	    (setq agenda (cons sym agenda))))))

    name))

(defmacro c-lang-const (name &optional lang)
  "Get the mode specific value of the language constant NAME in language LANG.
LANG is the name of the language, i.e. the mode name without the
\"-mode\" suffix.  If used inside `c-lang-defconst' or
`c-lang-defvar', LANG may be left out to refer to the current
language.  NAME and LANG are not evaluated so they should not be
quoted."

  (or (symbolp name)
      (error "Not a symbol: %S" name))
  (or (symbolp lang)
      (error "Not a symbol: %S" lang))

  (let ((sym (intern (symbol-name name) c-lang-constants))
	(mode (when lang (intern (concat (symbol-name lang) "-mode")))))

    (or (get mode 'c-mode-prefix) (null mode)
        (error "Unknown language %S: no `c-mode-prefix' property"
               lang))

    (if (eq c-lang-const-expansion 'immediate)
	;; No need to find out the source file(s) when we evaluate
	;; immediately since all the info is already there in the
	;; `source' property.
	`',(c-get-lang-constant name nil mode)

      (let ((source-files
             (let ((file (c-get-current-file)))
               (if file (setq file (intern file)))
               ;; Get the source file(s) that must be loaded to get the value
               ;; of the constant.  If the symbol isn't defined yet we assume
               ;; that its definition will come later in this file, and thus
               ;; are no file dependencies needed.
               (nreverse
                ;; Reverse to get the right load order.
		(c--mapcan (lambda (elem)
			     (if (eq file (car elem))
				 nil	; Exclude our own file.
			       (list (car elem))))
			   (get sym 'source)))))

            ;; Make some effort to do a compact call to
            ;; `c-get-lang-constant' since it will be compiled in.
            (args (and mode `(',mode))))

        (if (or source-files args)
            (push (and source-files `',source-files) args))

        (if (or (eq c-lang-const-expansion 'call)
                (and (not c-lang-const-expansion)
                     (not mode))
		(not (cc-bytecomp-is-compiling)))
            ;; Either a straight call is requested in the context, or
            ;; we're in an "uncontrolled" context and got no language,
            ;; or we're not being byte compiled so the compile time
            ;; stuff below is unnecessary.
            `(c-get-lang-constant ',name ,@args)

          ;; Being compiled.  If the loading and compiling version is
          ;; the same we use a value that is evaluated at compile time,
          ;; otherwise it's evaluated at runtime.
          `(if (eq c-version-sym ',c-version-sym)
               (cc-eval-when-compile
                 (c-get-lang-constant ',name ,@args))
             (c-get-lang-constant ',name ,@args)))))))

(defvar c-lang-constants-under-evaluation nil
  "Alist of constants in the process of being evaluated.
The `cdr' of each entry indicates how far we've looked in the list
of definitions, so that the def for var FOO in c-mode can be defined in
terms of the def for that same var FOO (which will then rely on the
fallback definition for all modes, to break the cycle).")

(defconst c-lang--novalue "novalue")

(defun c-get-lang-constant (name &optional source-files mode)
  ;; Used by `c-lang-const'.

  (or mode
      (setq mode c-buffer-is-cc-mode)
      (error "No current language"))

  (let* ((sym (intern (symbol-name name) c-lang-constants))
	 (source (get sym 'source))
	 elem
	 (eval-in-sym (and c-lang-constants-under-evaluation
			   (caar c-lang-constants-under-evaluation))))

    ;; Record the dependencies between this symbol and the one we're
    ;; being evaluated in.
    (when eval-in-sym
      (or (memq eval-in-sym (get sym 'dependents))
	  (put sym 'dependents (cons eval-in-sym (get sym 'dependents)))))

    ;; Make sure the source files have entries on the `source'
    ;; property so that loading will take place when necessary.
    (while source-files
      (unless (assq (car source-files) source)
	(put sym 'source
	     (setq source (cons (list (car source-files)) source)))
	;; Might pull in more definitions which affect the value.  The
	;; clearing of dependent values etc is done when the
	;; definition is encountered during the load; this is just to
	;; jump past the check for a cached value below.
	(set sym nil))
      (setq source-files (cdr source-files)))

    (if (and (boundp sym)
	     (setq elem (assq mode (symbol-value sym))))
	(cdr elem)

      ;; Check if an evaluation of this symbol is already underway.
      ;; In that case we just continue with the "assignment" before
      ;; the one currently being evaluated, thereby creating the
      ;; illusion if a `setq'-like sequence of assignments.
      (let* ((c-buffer-is-cc-mode mode)
	     (source-pos
	      (or (assq sym c-lang-constants-under-evaluation)
		  (cons sym (vector source nil))))
	     ;; Append `c-lang-constants-under-evaluation' even if an
	     ;; earlier entry is found.  It's only necessary to get
	     ;; the recording of dependencies above correct.
	     (c-lang-constants-under-evaluation
	      (cons source-pos c-lang-constants-under-evaluation))
	     (fallback (get mode 'c-fallback-mode))
	     value
	     ;; Make sure the recursion limits aren't very low
	     ;; since the `c-lang-const' dependencies can go deep.
	     (max-specpdl-size (max max-specpdl-size 3000))
	     (max-lisp-eval-depth (max max-lisp-eval-depth 1000)))

	(if (if fallback
		(let ((backup-source-pos (copy-sequence (cdr source-pos))))
		  (and
		   ;; First try the original mode but don't accept an
		   ;; entry matching all languages since the fallback
		   ;; mode might have an explicit entry before that.
		   (eq (setq value (c-find-assignment-for-mode
				    (cdr source-pos) mode nil name))
		       c-lang--novalue)
		   ;; Try again with the fallback mode from the
		   ;; original position.  Note that
		   ;; `c-buffer-is-cc-mode' still is the real mode if
		   ;; language parameterization takes place.
		   (eq (setq value (c-find-assignment-for-mode
				    (setcdr source-pos backup-source-pos)
				    fallback t name))
		       c-lang--novalue)))
	      ;; A simple lookup with no fallback mode.
	      (eq (setq value (c-find-assignment-for-mode
			       (cdr source-pos) mode t name))
		  c-lang--novalue))
	    (error
	     "`%s' got no (prior) value in %S (might be a cyclic reference)"
	     name mode))

	(condition-case err
	    (setq value (funcall value))
	  (error
	   ;; Print a message to aid in locating the error.  We don't
	   ;; print the error itself since that will be done later by
	   ;; some caller higher up.
	   (message "Eval error in the `c-lang-defconst' for `%S' in %s:"
		    sym mode)
	   (makunbound sym)
	   (signal (car err) (cdr err))))

	(set sym (cons (cons mode value) (symbol-value sym)))
	value))))

(defun c-find-assignment-for-mode (source-pos mode match-any-lang _name)
  ;; Find the first assignment entry that applies to MODE at or after
  ;; SOURCE-POS.  If MATCH-ANY-LANG is non-nil, entries with t as
  ;; the language list are considered to match, otherwise they don't.
  ;; On return SOURCE-POS is updated to point to the next assignment
  ;; after the returned one.  If no assignment is found,
  ;; `c-lang--novalue' is returned as a magic value.
  ;;
  ;; SOURCE-POS is a vector that points out a specific assignment in
  ;; the double alist that's used in the `source' property.  The first
  ;; element is the position in the top alist which is indexed with
  ;; the source files, and the second element is the position in the
  ;; nested bindings alist.
  ;;
  ;; NAME is only used for error messages.

  (catch 'found
    (let ((file-entry (elt source-pos 0))
	  (assignment-entry (elt source-pos 1))
	  assignment)

      (while (if assignment-entry
		 t
	       ;; Handled the last assignment from one file, begin on the
	       ;; next.  Due to the check in `c-lang-defconst', we know
	       ;; there's at least one.
	       (when file-entry

		 (unless (aset source-pos 1
			       (setq assignment-entry (cdar file-entry)))
		   ;; The file containing the source definitions has not
		   ;; been loaded.
		   (let ((file (symbol-name (caar file-entry)))
			 (c-lang-constants-under-evaluation nil))
		     ;;(message (concat "Loading %s to get the source "
		     ;;			"value for language constant %s")
		     ;;		file name)
		     (load file nil t))

		   (unless (setq assignment-entry (cdar file-entry))
		     ;; The load didn't fill in the source for the
		     ;; constant as expected.  The situation is
		     ;; probably that a derived mode was written for
		     ;; and compiled with another version of CC Mode,
		     ;; and the requested constant isn't in the
		     ;; currently loaded one.  Put in a dummy
		     ;; assignment that matches no language.
		     (setcdr (car file-entry)
			     (setq assignment-entry (list (list nil))))))

		 (aset source-pos 0 (setq file-entry (cdr file-entry)))
		 t))

	(setq assignment (car assignment-entry))
	(aset source-pos 1
	      (setq assignment-entry (cdr assignment-entry)))

	(when (if (listp (car assignment))
		  (memq mode (car assignment))
		match-any-lang)
	  (throw 'found (cdr assignment))))

      c-lang--novalue)))

(defun c-lang-major-mode-is (mode)
  ;; `c-major-mode-is' expands to a call to this function inside
  ;; `c-lang-defconst'.  Here we also match the mode(s) against any
  ;; fallback modes for the one in `c-buffer-is-cc-mode', so that
  ;; e.g. (c-major-mode-is 'c++-mode) is true in a derived language
  ;; that has c++-mode as base mode.
  (unless (listp mode)
    (setq mode (list mode)))
  (let (match (buf-mode c-buffer-is-cc-mode))
    (while (if (memq buf-mode mode)
	       (progn
		 (setq match t)
		 nil)
	     (setq buf-mode (get buf-mode 'c-fallback-mode))))
    match))

\f
(cc-provide 'cc-defs)

;; Local Variables:
;; indent-tabs-mode: t
;; tab-width: 8
;; End:
;;; cc-defs.el ends here

debug log:

solving ac1c421e37 ...
found ac1c421e37 in https://yhetil.org/emacs-bugs/87zh5iyu4d.fsf@thornhill.no/ ||
	https://yhetil.org/emacs-bugs/87r1qt4ip3.fsf@thornhill.no/
found 77e263f1aa in https://git.savannah.gnu.org/cgit/emacs.git
preparing index
index prepared:
100644 77e263f1aadf7ed7b689a43f74962344bccfa0fb	lisp/progmodes/cc-defs.el

applying [1/1] https://yhetil.org/emacs-bugs/87zh5iyu4d.fsf@thornhill.no/
diff --git a/lisp/progmodes/cc-defs.el b/lisp/progmodes/cc-defs.el
index 77e263f1aa..ac1c421e37 100644

Checking patch lisp/progmodes/cc-defs.el...
Applied patch lisp/progmodes/cc-defs.el cleanly.

skipping https://yhetil.org/emacs-bugs/87r1qt4ip3.fsf@thornhill.no/ for ac1c421e37
index at:
100644 ac1c421e37a07fc9026c629ace8fabf461a62cb9	lisp/progmodes/cc-defs.el

(*) Git path names are given by the tree(s) the blob belongs to.
    Blobs themselves have no identifier aside from the hash of its contents.^

Code repositories for project(s) associated with this public inbox

	https://git.savannah.gnu.org/cgit/emacs.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).