unofficial mirror of emacs-devel@gnu.org 
 help / color / mirror / code / Atom feed
blob 6cd4832165ce2754b0e27dcac001a6d210c14739 74329 bytes (raw)
name: lisp/cedet/semantic/grammar.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
 
;;; semantic/grammar.el --- Major mode framework for Semantic grammars

;; Copyright (C) 2002-2005, 2007-2020 Free Software Foundation, Inc.

;; Author: David Ponce <david@dponce.com>

;; 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:
;;
;; Major mode framework for editing Semantic's input grammar files.

;;; History:
;;

;;; Code:

(require 'semantic)
(require 'semantic/wisent)
(require 'semantic/ctxt)
(require 'semantic/format)
;; FIXME this is a generated file, but we need to load this file to
;; generate it!
(require 'semantic/grammar-wy)
(require 'semantic/idle)
(require 'help-fns)
(require 'semantic/analyze)

(declare-function semantic-momentary-highlight-tag "semantic/decorate")
(declare-function semantic-analyze-tags-of-class-list
		  "semantic/analyze/complete")

(eval-when-compile
  (require 'eldoc)
  (require 'semantic/edit)
  (require 'semantic/find)
  (require 'semantic/db))

(declare-function semantic-grammar-wy--install-parser "semantic/grammar-wy")

\f
;;;;
;;;; Set up lexer
;;;;

(defconst semantic-grammar-lex-c-char-re "'\\s\\?.'"
  "Regexp matching C-like character literals.")

;; Most of the analyzers are auto-generated from the grammar, but the
;; following which need special handling code.
;;
(define-lex-regex-analyzer semantic-grammar-lex-prologue
  "Detect and create a prologue token."
  "\\<%{"
  ;; Zing to the end of this brace block.
  (semantic-lex-push-token
   (semantic-lex-token
    'PROLOGUE (point)
    (save-excursion
      (semantic-lex-unterminated-syntax-protection 'PROLOGUE
        (forward-char)
        (forward-sexp 1)
        (point))))))

(defsubst semantic-grammar-epilogue-start ()
  "Return the start position of the grammar epilogue."
  (save-excursion
    (goto-char (point-min))
    (if (re-search-forward "^\\s-*\\<%%\\>\\s-*$" nil t 2)
        (match-beginning 0)
      (1+ (point-max)))))

(define-lex-regex-analyzer semantic-grammar-lex-epilogue
  "Detect and create an epilogue or percent-percent token."
  "\\<%%\\>"
  (let ((start (match-beginning 0))
        (end   (match-end 0))
        (class 'PERCENT_PERCENT))
    (when (>= start (semantic-grammar-epilogue-start))
      (setq class 'EPILOGUE
            end   (point-max)))
    (semantic-lex-push-token
     (semantic-lex-token class start end))))

(define-lex semantic-grammar-lexer
  "Lexical analyzer that handles Semantic grammar buffers.
It ignores whitespaces, newlines and comments."
  semantic-lex-ignore-newline
  semantic-lex-ignore-whitespace
  ;; Must detect prologue/epilogue before other symbols/keywords!
  semantic-grammar-lex-prologue
  semantic-grammar-lex-epilogue
  semantic-grammar-wy--<keyword>-keyword-analyzer
  semantic-grammar-wy--<symbol>-regexp-analyzer
  semantic-grammar-wy--<char>-regexp-analyzer
  semantic-grammar-wy--<string>-sexp-analyzer
  ;; Must detect comments after strings because `comment-start-skip'
  ;; regexp match semicolons inside strings!
  semantic-lex-ignore-comments
  ;; Must detect prefixed list before punctuation because prefix chars
  ;; are also punctuation!
  semantic-grammar-wy--<qlist>-sexp-analyzer
  ;; Must detect punctuation after comments because the semicolon can
  ;; be punctuation or a comment start!
  semantic-grammar-wy--<punctuation>-string-analyzer
  semantic-grammar-wy--<block>-block-analyzer
  semantic-grammar-wy--<sexp>-sexp-analyzer)

;;; Test the lexer
;;
(defun semantic-grammar-lex-buffer ()
  "Run `semantic-grammar-lex' on current buffer."
  (interactive)
  (semantic-lex-init)
  (setq semantic-lex-analyzer 'semantic-grammar-lexer)
  (let ((token-stream
         (semantic-lex (point-min) (point-max))))
    (with-current-buffer (get-buffer-create "*semantic-grammar-lex*")
      (erase-buffer)
      (pp token-stream (current-buffer))
      (goto-char (point-min))
      (pop-to-buffer (current-buffer)))))
\f
;;;;
;;;; Semantic action expansion
;;;;

(defun semantic-grammar-ASSOC (&rest args)
  "Return expansion of built-in ASSOC expression.
ARGS are ASSOC's key value list."
  (let ((key t))
    `(semantic-tag-make-assoc-list
      ,@(mapcar #'(lambda (i)
                    (prog1
                        (if key
                            (list 'quote i)
                          i)
                      (setq key (not key))))
                args))))

(defsubst semantic-grammar-quote-p (sym)
  "Return non-nil if SYM is bound to the `quote' function."
  (condition-case nil
      (eq (indirect-function sym)
          (indirect-function 'quote))
    (error nil)))

(defsubst semantic-grammar-backquote-p (sym)
  "Return non-nil if SYM is bound to the `backquote' function."
  (condition-case nil
      (eq (indirect-function sym)
          (indirect-function 'backquote))
    (error nil)))
\f
;;;;
;;;; API to access grammar tags
;;;;

(define-mode-local-override semantic-tag-components
  semantic-grammar-mode (tag)
  "Return the children of tag TAG."
  (semantic-tag-get-attribute tag :children))

(defun semantic-grammar-first-tag-name (class)
  "Return the name of the first tag of class CLASS found.
Warn if other tags of class CLASS exist."
  (let* ((tags (semantic-find-tags-by-class
                class (current-buffer))))
    (if tags
        (prog1
            (semantic-tag-name (car tags))
          (if (cdr tags)
              (message "*** Ignore all but first declared %s"
                       class))))))

(defun semantic-grammar-tag-symbols (class)
  "Return the list of symbols defined in tags of class CLASS.
That is tag names plus names defined in tag attribute `:rest'."
  (let* ((tags (semantic-find-tags-by-class
                class (current-buffer))))
    (apply 'append
           (mapcar
            #'(lambda (tag)
                (mapcar
                 'intern
                 (cons (semantic-tag-name tag)
                       (semantic-tag-get-attribute tag :rest))))
            tags))))

(defsubst semantic-grammar-item-text (item)
  "Return the readable string form of ITEM."
  (if (string-match semantic-grammar-lex-c-char-re item)
      (concat "?" (substring item 1 -1))
    item))

(defsubst semantic-grammar-item-value (item)
  "Return symbol or character value of ITEM string."
  (if (string-match semantic-grammar-lex-c-char-re item)
      (read (concat "?" (substring item 1 -1)))
    (intern item)))

(defun semantic-grammar-prologue ()
  "Return grammar prologue code as a string value."
  (let ((tag (semantic-find-first-tag-by-name
              "prologue"
              (semantic-find-tags-by-class 'code (current-buffer)))))
    (if tag
        (save-excursion
          (concat
           (buffer-substring
            (progn
              (goto-char (semantic-tag-start tag))
              (skip-chars-forward "%{\r\n\t ")
              (point))
            (progn
              (goto-char (semantic-tag-end tag))
              (skip-chars-backward "\r\n\t %}")
              (point)))
           "\n"))
      "")))

(defun semantic-grammar-epilogue ()
  "Return grammar epilogue code as a string value."
  (let ((tag (semantic-find-first-tag-by-name
              "epilogue"
              (semantic-find-tags-by-class 'code (current-buffer)))))
    (if tag
        (save-excursion
          (concat
           (buffer-substring
            (progn
              (goto-char (semantic-tag-start tag))
              (skip-chars-forward "%\r\n\t ")
              (point))
            (progn
              (goto-char (semantic-tag-end tag))
              (skip-chars-backward "\r\n\t")
              ;; If a grammar footer is found, skip it.
              (re-search-backward "^;;;\\s-+\\S-+\\s-+ends here"
                                  (point-at-bol) t)
              (skip-chars-backward "\r\n\t")
              (point)))
           "\n"))
      "")))

(defsubst semantic-grammar-buffer-file (&optional buffer)
  "Return name of file sans directory BUFFER is visiting.
No argument or nil as argument means use the current buffer."
  (file-name-nondirectory (buffer-file-name buffer)))

(defun semantic-grammar-package ()
  "Return the %package value as a string.
If there is no %package statement in the grammar, return a default
package name derived from the grammar file name.  For example, the
default package name for the grammar file foo.wy is foo-wy, and for
foo.by it is foo-by."
  (or (semantic-grammar-first-tag-name 'package)
      (let* ((file (semantic-grammar-buffer-file))
             (ext  (file-name-extension file))
             (i    (string-match (format "\\([.]\\)%s\\'" ext) file)))
        (concat (substring file 0 i) "-" ext))))

(defun semantic-grammar-expected-conflicts ()
  "Return the number of expected shift/reduce conflicts in the package."
  (semantic-grammar-tag-symbols 'expectedconflicts))

(defsubst semantic-grammar-languagemode ()
  "Return the %languagemode value as a list of symbols or nil."
  (semantic-grammar-tag-symbols 'languagemode))

(defsubst semantic-grammar-start ()
  "Return the %start value as a list of symbols or nil."
  (semantic-grammar-tag-symbols 'start))

(defsubst semantic-grammar-scopestart ()
  "Return the %scopestart value as a symbol or nil."
  (intern (or (semantic-grammar-first-tag-name 'scopestart) "nil")))

(defsubst semantic-grammar-quotemode ()
  "Return the %quotemode value as a symbol or nil."
  (intern (or (semantic-grammar-first-tag-name 'quotemode) "nil")))

(defsubst semantic-grammar-keywords ()
  "Return the language keywords.
That is an alist of (VALUE . TOKEN) where VALUE is the string value of
the keyword and TOKEN is the terminal symbol identifying the keyword."
  (mapcar
   #'(lambda (key)
       (cons (semantic-tag-get-attribute key :value)
             (intern (semantic-tag-name key))))
   (semantic-find-tags-by-class 'keyword (current-buffer))))

(defun semantic-grammar-keyword-properties (keywords)
  "Return the list of KEYWORDS properties."
  (let ((puts (semantic-find-tags-by-class
               'put (current-buffer)))
        put keys key plist assoc pkey pval props)
    (while puts
      (setq put   (car puts)
            puts  (cdr puts)
            keys  (mapcar
                   'intern
                   (cons (semantic-tag-name put)
                         (semantic-tag-get-attribute put :rest))))
      (while keys
        (setq key   (car keys)
              keys  (cdr keys)
              assoc (rassq key keywords))
        (if (null assoc)
            nil ;;(message "*** %%put to undefined keyword %s ignored" key)
          (setq key   (car assoc)
                plist (semantic-tag-get-attribute put :value))
          (while plist
            (setq pkey  (intern (caar plist))
                  pval  (read (cdar plist))
                  props (cons (list key pkey pval) props)
                  plist (cdr plist))))))
    props))

(defun semantic-grammar-tokens ()
  "Return defined lexical tokens.
That is an alist (TYPE . DEFS) where type is a %token <type> symbol
and DEFS is an alist of (TOKEN . VALUE).  TOKEN is the terminal symbol
identifying the token and VALUE is the string value of the token or
nil."
  (let (tags alist assoc tag type term names value)

    ;; Check for <type> in %left, %right & %nonassoc declarations
    (setq tags (semantic-find-tags-by-class
                'assoc (current-buffer)))
    (while tags
      (setq tag  (car tags)
            tags (cdr tags))
      (when (setq type (semantic-tag-type tag))
        (setq names (semantic-tag-get-attribute tag :value)
              assoc (assoc type alist))
        (or assoc (setq assoc (list type)
                        alist (cons assoc alist)))
        (while names
          (setq term  (car names)
                names (cdr names))
          (or (string-match semantic-grammar-lex-c-char-re term)
              (setcdr assoc (cons (list (intern term))
                                  (cdr assoc)))))))

    ;; Then process %token declarations so they can override any
    ;; previous specifications
    (setq tags (semantic-find-tags-by-class
                'token (current-buffer)))
    (while tags
      (setq tag  (car tags)
            tags (cdr tags))
      (setq names (cons (semantic-tag-name tag)
                        (semantic-tag-get-attribute tag :rest))
            type  (or (semantic-tag-type tag) "<no-type>")
            value (semantic-tag-get-attribute tag :value)
            assoc (assoc type alist))
      (or assoc (setq assoc (list type)
                      alist (cons assoc alist)))
      (while names
        (setq term  (intern (car names))
              names (cdr names))
        (setcdr assoc (cons (cons term value) (cdr assoc)))))
    alist))

(defun semantic-grammar-token-%type-properties (&optional props)
  "Return properties set by %type statements.
This declare a new type if necessary.
If optional argument PROPS is non-nil, it is an existing list of
properties where to add new properties."
  (let (type)
    (dolist (tag (semantic-find-tags-by-class 'type (current-buffer)))
      (setq type (semantic-tag-name tag))
      ;; Indicate to auto-generate the analyzer for this type
      (push (list type :declared t) props)
      (dolist (e (semantic-tag-get-attribute tag :value))
        (push (list type (intern (car e)) (read (or (cdr e) "nil")))
              props)))
    props))

(defun semantic-grammar-token-%put-properties (tokens)
  "For types found in TOKENS, return properties set by %put statements."
  (let (found props)
    (dolist (put (semantic-find-tags-by-class 'put (current-buffer)))
      (dolist (type (cons (semantic-tag-name put)
                          (semantic-tag-get-attribute put :rest)))
        (setq found (assoc type tokens))
        (if (null found)
            nil ;; %put <type> ignored, no token defined
          (setq type (car found))
          (dolist (e (semantic-tag-get-attribute put :value))
            (push (list type (intern (car e)) (read (or (cdr e) "nil")))
                  props)))))
    props))

(defsubst semantic-grammar-token-properties (tokens)
  "Return properties of declared types.
Types are explicitly declared by %type statements.  Types found in
TOKENS are those declared implicitly by %token statements.
Properties can be set by %put and %type statements.
Properties set by %type statements take precedence over those set by
%put statements."
  (let ((props (semantic-grammar-token-%put-properties tokens)))
    (semantic-grammar-token-%type-properties props)))

(defun semantic-grammar-use-macros ()
  "Return macro definitions from %use-macros statements.
Also load the specified macro libraries."
  (let (lib defs)
    (dolist (tag (semantic-find-tags-by-class 'macro (current-buffer)))
      (setq lib (intern (semantic-tag-type tag)))
      (condition-case nil
          ;;(load lib) ;; Be sure to use the latest macro library.
          (require lib)
        (error nil))
      (dolist (mac (semantic-tag-get-attribute tag :value))
        (push (cons (intern mac)
                    (intern (format "%s-%s" lib mac)))
              defs)))
    (nreverse defs)))

(defvar semantic-grammar-macros nil
  "List of associations (MACRO-NAME . EXPANDER).")
(make-variable-buffer-local 'semantic-grammar-macros)

(defun semantic-grammar-macros ()
  "Build and return the alist of defined macros."
  (append
   ;; Definitions found in tags.
   (semantic-grammar-use-macros)
   ;; Other pre-installed definitions.
   semantic-grammar-macros))
\f
;;;;
;;;; Overloaded functions that build parser data.
;;;;

;;; Keyword table builder
;;
(defun semantic-grammar-keywordtable-builder-default ()
  "Return the default value of the keyword table."
  (let ((keywords (semantic-grammar-keywords)))
    `(semantic-lex-make-keyword-table
      ',keywords
      ',(semantic-grammar-keyword-properties keywords))))

(define-overloadable-function semantic-grammar-keywordtable-builder ()
  "Return the keyword table value.")

;;; Token table builder
;;
(defun semantic-grammar-tokentable-builder-default ()
  "Return the default value of the table of lexical tokens."
  (let ((tokens (semantic-grammar-tokens)))
    `(semantic-lex-make-type-table
      ',tokens
      ',(semantic-grammar-token-properties tokens))))

(define-overloadable-function semantic-grammar-tokentable-builder ()
  "Return the value of the table of lexical tokens.")

;;; Parser table builder
;;
(defun semantic-grammar-parsetable-builder-default ()
  "Return the default value of the parse table."
  (error "`semantic-grammar-parsetable-builder' not defined"))

(define-overloadable-function semantic-grammar-parsetable-builder ()
  "Return the parser table value.")

;;; Parser setup code builder
;;
(defun semantic-grammar-setupcode-builder-default ()
  "Return the default value of the setup code form."
  (error "`semantic-grammar-setupcode-builder' not defined"))

(define-overloadable-function semantic-grammar-setupcode-builder ()
  "Return the parser setup code form.")
\f
;;;;
;;;; Lisp code generation
;;;;
(defvar semantic--grammar-input-buffer  nil)
(defvar semantic--grammar-output-buffer nil)
(defvar semantic--grammar-package nil)
(defvar semantic--grammar-provide nil)

(defsubst semantic-grammar-keywordtable ()
  "Return the variable name of the keyword table."
  (concat semantic--grammar-package
          "--keyword-table"))

(defsubst semantic-grammar-tokentable ()
  "Return the variable name of the token table."
  (concat semantic--grammar-package
          "--token-table"))

(defsubst semantic-grammar-parsetable ()
  "Return the variable name of the parse table."
  (concat semantic--grammar-package
          "--parse-table"))

(defsubst semantic-grammar-setupfunction ()
  "Return the name of the parser setup function."
  (concat semantic--grammar-package
          "--install-parser"))

(defmacro semantic-grammar-as-string (object)
  "Return OBJECT as a string value."
  `(if (stringp ,object)
       ,object
     ;;(require 'pp)
     (pp-to-string ,object)))

(defun semantic-grammar-insert-defconst (name value docstring)
  "Insert declaration of constant NAME with VALUE and DOCSTRING."
  (let ((start (point)))
    (insert (format "(defconst %s\n%s%S)\n\n" name value docstring))
    (save-excursion
      (goto-char start)
      (indent-sexp))))

(defun semantic-grammar-insert-defconst-with-eval (name value docstring)
  "Insert declaration of constant NAME with VALUE and DOCSTRING."
  (let ((start (point)))
    (insert (format "(eval-and-compile (defconst %s\n%s%S))\n\n" name value docstring))
    (save-excursion
      (goto-char start)
      (indent-sexp))))

(defun semantic-grammar-insert-defun (name body docstring)
  "Insert declaration of function NAME with BODY and DOCSTRING."
  (let ((start (point)))
    (insert (format "(defun %s ()\n%S\n%s)\n\n" name docstring body))
    (save-excursion
      (goto-char start)
      (indent-sexp))))

(defun semantic-grammar-insert-define (define)
  "Insert the declaration specified by DEFINE expression.
Typically a DEFINE expression should look like this:

\(define-thing name docstring expression1 ...)"
  ;;(require 'pp)
  (let ((start (point)))
    (insert (format "(%S %S" (car define) (nth 1 define)))
    (dolist (item (nthcdr 2 define))
      (insert "\n")
      (delete-blank-lines)
      (pp item (current-buffer)))
    (insert ")\n\n")
    (save-excursion
      (goto-char start)
      (indent-sexp))))

(defconst semantic-grammar-header-template
  '("\
;;; " file " --- Generated parser support file

" copy "

;; Author: " user-full-name " <" user-mail-address ">
;; Created: " date "
;; Keywords: syntax
;; X-RCS: " vcid "

;; This file is not part of GNU Emacs.

;; This program 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.

;; This software 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 this program.  If not, see <https://www.gnu.org/licenses/>.

;;; Commentary:
;;
;; PLEASE DO NOT MANUALLY EDIT THIS FILE!  It is automatically
;; generated from the grammar file " gram ".

;;; History:
;;

;;; Code:

(require 'semantic/lex)
(eval-when-compile (require 'semantic/bovine))
")
  "Generated header template.
The symbols in the template are local variables in
`semantic-grammar-header'")

(defconst semantic-grammar-footer-template
  '("\

\(provide '" libr ")

;; Local Variables:
;; version-control: never
;; no-update-autoloads: t
;; End:

;;; " file " ends here
")
  "Generated footer template.
The symbols in the list are local variables in
`semantic-grammar-footer'.")

(defun semantic-grammar-copyright-line ()
  "Return the grammar copyright line, or nil if not found."
  (save-excursion
    (goto-char (point-min))
    (when (re-search-forward "^;;+[ \t]+Copyright (C) .*$"
                             ;; Search only in the four top lines
                             (save-excursion (forward-line 4) (point))
                             t)
      (match-string 0))))

(defun semantic-grammar--template-expand (template env)
  (mapconcat (lambda (S)
               (if (stringp S) S
                 (let ((x (assq S env)))
                   (cond
                    (x (cdr x))
                    ((symbolp S) (symbol-value S))))))
             template ""))

(defun semantic-grammar-header ()
  "Return text of a generated standard header."
  (semantic-grammar--template-expand
   semantic-grammar-header-template
   `((file . ,(semantic-grammar-buffer-file
               semantic--grammar-output-buffer))
     (gram . ,(semantic-grammar-buffer-file))
     (date . ,(format-time-string "%Y-%m-%d %T%z"))
     (vcid . ,(concat "$" "Id" "$")) ;; Avoid expansion
     ;; Try to get the copyright from the input grammar, or
     ;; generate a new one if not found.
     (copy . ,(or (semantic-grammar-copyright-line)
                  (concat (format-time-string ";; Copyright (C) %Y ")
                          user-full-name))))))

(defun semantic-grammar-footer ()
  "Return text of a generated standard footer."
  (semantic-grammar--template-expand
   semantic-grammar-footer-template
   `((file . ,(semantic-grammar-buffer-file
               semantic--grammar-output-buffer))
     (libr . ,(or semantic--grammar-provide
                  semantic--grammar-package)))))

(defun semantic-grammar-token-data ()
  "Return the string value of the table of lexical tokens."
  (semantic-grammar-as-string
   (semantic-grammar-tokentable-builder)))

(defun semantic-grammar-keyword-data ()
  "Return the string value of the table of keywords."
  (semantic-grammar-as-string
   (semantic-grammar-keywordtable-builder)))

(defun semantic-grammar-parser-data ()
  "Return the parser table as a string value."
  (semantic-grammar-as-string
   (semantic-grammar-parsetable-builder)))

(defun semantic-grammar-setup-data ()
  "Return the parser setup code form as a string value."
  (semantic-grammar-as-string
   (semantic-grammar-setupcode-builder)))
\f
;;; Generation of lexical analyzers.
;;
(defvar semantic-grammar--lex-block-specs)

(defsubst semantic-grammar--lex-delim-spec (block-spec)
  "Return delimiters specification from BLOCK-SPEC."
  (condition-case nil
      (let* ((standard-input (cdr block-spec))
             (delim-spec (read)))
        (if (and (consp delim-spec)
                 (car delim-spec) (symbolp (car delim-spec))
                 (cadr delim-spec) (symbolp (cadr delim-spec)))
            delim-spec
          (error "Invalid delimiter")))
    (error
     (error "Invalid delimiters specification %s in block token %s"
            (cdr block-spec) (car block-spec)))))

(defun semantic-grammar--lex-block-specs ()
  "Compute lexical block specifications for the current buffer.
Block definitions are read from the current table of lexical types."
  (cond
   ;; Block specifications have been parsed and are invalid.
   ((eq semantic-grammar--lex-block-specs 'error)
    nil
    )
   ;; Parse block specifications.
   ((null semantic-grammar--lex-block-specs)
    (condition-case err
        (let* ((blocks       (cdr (semantic-lex-type-value "block" t)))
               (open-delims  (cdr (semantic-lex-type-value "open-paren" t)))
               (close-delims (cdr (semantic-lex-type-value "close-paren" t)))
               olist clist delim-spec open-spec close-spec)
          (dolist (block-spec blocks)
            (setq delim-spec (semantic-grammar--lex-delim-spec block-spec)
                  open-spec  (assq (car  delim-spec) open-delims)
                  close-spec (assq (cadr delim-spec) close-delims))
            (or open-spec
                (error "Missing open-paren token %s required by block %s"
                       (car delim-spec) (car block-spec)))
            (or close-spec
                (error "Missing close-paren token %s required by block %s"
                       (cdr delim-spec) (car block-spec)))
            ;; build alist ((OPEN-DELIM OPEN-SYM BLOCK-SYM) ...)
            (push (list (cdr open-spec) (car open-spec) (car block-spec))
                  olist)
            ;; build alist ((CLOSE-DELIM CLOSE-SYM) ...)
            (push (list (cdr close-spec) (car close-spec))
                  clist))
          (setq semantic-grammar--lex-block-specs (cons olist clist)))
      (error
       (setq semantic-grammar--lex-block-specs 'error)
       (message "%s" (error-message-string err))
       nil))
    )
   ;; Block specifications already parsed.
   (t
    semantic-grammar--lex-block-specs)))

(defsubst semantic-grammar-quoted-form (exp)
  "Return a quoted form of EXP if it isn't a self evaluating form."
  (if (and (not (null exp))
           (or (listp exp) (symbolp exp)))
      (list 'quote exp)
    exp))

(defun semantic-grammar-insert-defanalyzer (type)
  "Insert declaration of the lexical analyzer defined with TYPE."
  (let* ((type-name  (symbol-name type))
         (type-value (symbol-value type))
         (syntax     (get type 'syntax))
         (declared   (get type :declared))
         spec mtype prefix name doc)
    ;; Generate an analyzer if the corresponding type has been
    ;; explicitly declared in a %type statement, and if at least the
    ;; syntax property has been provided.
    (when (and declared syntax)
      (setq prefix semantic--grammar-package
            mtype (or (get type 'matchdatatype) 'regexp)
            name (intern (format "%s--<%s>-%s-analyzer" prefix type mtype))
            doc (format "%s analyzer for <%s> tokens." mtype type))
      (cond
       ;; Regexp match analyzer
       ((eq mtype 'regexp)
        (semantic-grammar-insert-define
         `(define-lex-regex-type-analyzer ,name
            ,doc ,syntax
            ,(semantic-grammar-quoted-form (cdr type-value))
            ',(or (car type-value) (intern type-name))))
        )
       ;; String compare analyzer
       ((eq mtype 'string)
        (semantic-grammar-insert-define
         `(define-lex-string-type-analyzer ,name
            ,doc ,syntax
            ,(semantic-grammar-quoted-form (cdr type-value))
            ',(or (car type-value) (intern type-name))))
        )
       ;; Block analyzer
       ((and (eq mtype 'block)
             (setq spec (semantic-grammar--lex-block-specs)))
        (semantic-grammar-insert-define
         `(define-lex-block-type-analyzer ,name
            ,doc ,syntax
            ,(semantic-grammar-quoted-form spec)))
        )
       ;; Sexp analyzer
       ((eq mtype 'sexp)
        (semantic-grammar-insert-define
         `(define-lex-sexp-type-analyzer ,name
            ,doc ,syntax
            ',(or (car type-value) (intern type-name))))
        )
       ;; keyword analyzer
       ((eq mtype 'keyword)
        (semantic-grammar-insert-define
         `(define-lex-keyword-type-analyzer ,name
            ,doc ,syntax))
        )
       ))
    ))

(defun semantic-grammar-insert-defanalyzers ()
  "Insert declarations of lexical analyzers."
  (let (tokens props)
    (with-current-buffer semantic--grammar-input-buffer
      (setq tokens (semantic-grammar-tokens)
            props  (semantic-grammar-token-properties tokens)))
    (let ((semantic-lex-types-obarray
           (semantic-lex-make-type-table tokens props))
          semantic-grammar--lex-block-specs)
      (mapatoms 'semantic-grammar-insert-defanalyzer
                semantic-lex-types-obarray))))
\f
;;; Generation of the grammar support file.
;;
(defcustom semantic-grammar-file-regexp "\\.[wb]y\\'"
  "Regexp which matches grammar source files."
  :group 'semantic
  :type 'regexp)

(defun semantic-grammar-create-package (&optional force uptodate)
  "Create package Lisp code from grammar in current buffer.
If the Lisp code seems up to date, do nothing (if UPTODATE
is non-nil, return nil in such cases).
If optional argument FORCE is non-nil, unconditionally re-generate the
Lisp code."
  (interactive "P")
  (unless (semantic-active-p)
    (error "You have to activate semantic-mode to create a package."))
  (setq force (or force current-prefix-arg))
  (semantic-fetch-tags)
  (let* (
         ;; Values of the following local variables are obtained from
         ;; the grammar parsed tree in current buffer, that is before
         ;; switching to the output file.
         (semantic--grammar-package (semantic-grammar-package))
	 (semantic--grammar-provide (semantic-grammar-first-tag-name 'provide))
         (output   (concat (or semantic--grammar-provide
			       semantic--grammar-package) ".el"))
         (semantic--grammar-input-buffer  (current-buffer))
         (semantic--grammar-output-buffer
	  (find-file-noselect
	   (file-name-nondirectory output)))
         (header   (semantic-grammar-header))
         (prologue (semantic-grammar-prologue))
         (epilogue (semantic-grammar-epilogue))
         (footer   (semantic-grammar-footer))
         )
    (if (and (not force)
             (not (buffer-modified-p))
             (file-newer-than-file-p
              (buffer-file-name semantic--grammar-output-buffer)
              (buffer-file-name semantic--grammar-input-buffer)))
	(progn
	  (message "Package `%s' is up to date." semantic--grammar-package)
	  ;; It would be better if this were always the case, IMO,
	  ;; but the (unspecified) return value of this function is
	  ;; assumed to be non-nil in some places, it seems.
	  (if uptodate (setq output nil)))
      ;; Create the package
      (set-buffer semantic--grammar-output-buffer)
      ;; Use Unix EOLs, so that the file is portable to all platforms.
      (setq buffer-file-coding-system 'raw-text-unix)
      (erase-buffer)
      (unless (derived-mode-p 'emacs-lisp-mode)
        (emacs-lisp-mode))

;;;; Header + Prologue

      (insert header
              "\f\n;;; Prologue\n;;\n"
              prologue
              )
      ;; Evaluate the prologue now, because it might provide definition
      ;; of grammar macro expanders.
      (eval-region (point-min) (point))

      (save-excursion

;;;; Declarations

        (insert "\f\n;;; Declarations\n;;\n")

        (semantic-grammar-insert-defconst-with-eval
         (concat semantic--grammar-package "--expected-conflicts")
         (with-current-buffer semantic--grammar-input-buffer
           (format "%s\n" (car (semantic-grammar-expected-conflicts))))
         "The number of expected shift/reduce conflicts in this grammar.")

        ;; `eval-defun' is not necessary to reset `defconst' values.
        (semantic-grammar-insert-defconst
         (semantic-grammar-keywordtable)
         (with-current-buffer semantic--grammar-input-buffer
           (semantic-grammar-keyword-data))
         "Table of language keywords.")

        (semantic-grammar-insert-defconst
         (semantic-grammar-tokentable)
         (with-current-buffer semantic--grammar-input-buffer
           (semantic-grammar-token-data))
         "Table of lexical tokens.")

        (semantic-grammar-insert-defconst
         (semantic-grammar-parsetable)
         (with-current-buffer semantic--grammar-input-buffer
           (semantic-grammar-parser-data))
         "Parser table.")

        (semantic-grammar-insert-defun
         (semantic-grammar-setupfunction)
         (with-current-buffer semantic--grammar-input-buffer
           (semantic-grammar-setup-data))
         "Setup the Semantic Parser.")

;;;; Analyzers
        (insert "\f\n;;; Analyzers\n;;\n")

        (semantic-grammar-insert-defanalyzers)

;;;; Epilogue & Footer

        (insert "\f\n;;; Epilogue\n;;\n"
                epilogue
                footer
                )

        )

      (save-buffer 16)

      ;; If running in batch mode, there is nothing more to do.
      ;; Save the generated file and quit.
      (if noninteractive
          (let ((version-control t)
                (delete-old-versions t)
                (make-backup-files t)
                (vc-make-backup-files t))
            (kill-buffer (current-buffer)))
        ;; If running interactively, eval declarations and epilogue
        ;; code, then pop to the buffer visiting the generated file.
        (eval-region (point) (point-max))
	;; Loop over the defvars and eval them explicitly to force
	;; them to be evaluated and ready to use.
        (goto-char (point-min))
	(while (re-search-forward "(defvar " nil t)
	  (eval-defun nil))
	;; Move cursor to a logical spot in the generated code.
        (goto-char (point-min))
        (pop-to-buffer (current-buffer))
        ;; The generated code has been evaluated and updated into
        ;; memory.  Now find all buffers that match the major modes we
        ;; have created this language for, and force them to call our
        ;; setup function again, refreshing all semantic data, and
        ;; enabling them to work with the new code just created.
;;;; FIXME?
        ;; At this point, I don't know any user's defined setup code :-(
        ;; At least, what I can do for now, is to run the generated
        ;; parser-install function.
        (semantic-map-mode-buffers
         (semantic-grammar-setupfunction)
         (semantic-grammar-languagemode)))
      )
    ;; Return the name of the generated package file.
    output))

(defun semantic-grammar-recreate-package ()
  "Unconditionally create Lisp code from grammar in current buffer.
Like \\[universal-argument] \\[semantic-grammar-create-package]."
  (interactive)
  (semantic-grammar-create-package t))

(defun semantic-grammar-batch-build-one-package (file)
  "Build a Lisp package from the grammar in FILE.
That is, generate Lisp code from FILE, and `byte-compile' it.
Return non-nil if there were no errors, nil if errors."
  ;; We need this require so that we can find `byte-compile-dest-file'.
  (require 'bytecomp)
  (unless (auto-save-file-name-p file)
    ;; Create the package
    (let ((packagename
           (condition-case err
               (with-current-buffer (find-file-noselect file)
		 (let ((semantic-new-buffer-setup-functions nil)
		       (vc-handled-backends nil))
		   (setq semanticdb-new-database-class 'semanticdb-project-database)
		   (semantic-mode 1)
		   (semantic-grammar-create-package t)))
             (error
              (message "%s" (error-message-string err))
              nil))))
      (when packagename
        ;; Only byte compile if out of date
        (if (file-newer-than-file-p
             packagename (byte-compile-dest-file packagename))
            (let (;; Some complex grammar table expressions need a few
                  ;; more resources than the default.
                  (max-specpdl-size    (max 3000 max-specpdl-size))
                  (max-lisp-eval-depth (max 1000 max-lisp-eval-depth))
                  )
              ;; byte compile the resultant file
              (byte-compile-file packagename))
          t)))))

(defun semantic-grammar-batch-build-packages ()
  "Build Lisp packages from grammar files on the command line.
That is, run `semantic-grammar-batch-build-one-package' for each file.
Each file is processed even if an error occurred previously.
Must be used from the command line, with `-batch'.
For example, to process grammar files in current directory, invoke:

  \"emacs -batch -f semantic-grammar-batch-build-packages .\".

See also the variable `semantic-grammar-file-regexp'."
  (or noninteractive
      (error "\
`semantic-grammar-batch-build-packages' must be used with -batch"
             ))
  (let ((status 0)
        ;; Remove vc from find-file-hook.  It causes bad stuff to
        ;; happen in Emacs 20.
        (find-file-hook (delete 'vc-find-file-hook find-file-hook)))
    (dolist (arg command-line-args-left)
      (unless (and arg (file-exists-p arg))
        (error "Argument %s is not a valid file name" arg))
      (setq arg (expand-file-name arg))
      (if (file-directory-p arg)
          ;; Directory as argument
          (dolist (src (condition-case nil
                           (directory-files
                            arg nil semantic-grammar-file-regexp)
                         (error
                          (error "Unable to read directory files"))))
            (or (semantic-grammar-batch-build-one-package
                 (expand-file-name src arg))
                (setq status 1)))
        ;; Specific file argument
        (or (semantic-grammar-batch-build-one-package arg)
            (setq status 1))))
    (kill-emacs status)
    ))
\f
;;;;
;;;; Macros highlighting
;;;;

(defvar semantic--grammar-macros-regexp-1 nil)
(make-variable-buffer-local 'semantic--grammar-macros-regexp-1)

(defun semantic--grammar-macros-regexp-1 ()
  "Return font-lock keyword regexp for pre-installed macro names."
  (and semantic-grammar-macros
       (not semantic--grammar-macros-regexp-1)
       (condition-case nil
           (setq semantic--grammar-macros-regexp-1
                 (concat "(\\s-*"
                         (regexp-opt
                          (mapcar #'(lambda (e) (symbol-name (car e)))
                                  semantic-grammar-macros)
                          t)
                         "\\>"))
         (error nil)))
  semantic--grammar-macros-regexp-1)

(defconst semantic--grammar-macdecl-re
  "\\<%use-macros\\>[ \t\r\n]+\\(\\sw\\|\\s_\\)+[ \t\r\n]+{"
  "Regexp that matches a macro declaration statement.")

(defvar semantic--grammar-macros-regexp-2 nil)
(make-variable-buffer-local 'semantic--grammar-macros-regexp-2)

(defun semantic--grammar-clear-macros-regexp-2 (&rest _)
  "Clear the cached regexp that match macros local in this grammar.
IGNORE arguments.
Added to `before-change-functions' hooks to be run before each text
change."
  (setq semantic--grammar-macros-regexp-2 nil))

(defun semantic--grammar-macros-regexp-2 ()
  "Return the regexp that match macros local in this grammar."
  (unless semantic--grammar-macros-regexp-2
    (let (macs)
      (save-excursion
        (goto-char (point-min))
        (while (re-search-forward semantic--grammar-macdecl-re nil t)
          (condition-case nil
              (setq macs (nconc macs
                                (split-string
                                 (buffer-substring-no-properties
                                  (point)
                                  (progn
                                    (backward-char)
                                    (forward-list 1)
                                    (down-list -1)
                                    (point))))))
            (error nil)))
        (when macs
          (setq semantic--grammar-macros-regexp-2
                (concat "(\\s-*" (regexp-opt macs t) "\\>"))))))
  semantic--grammar-macros-regexp-2)

(defun semantic--grammar-macros-matcher (end)
  "Search for a grammar macro name to highlight.
END is the limit of the search."
  (let ((regexp (semantic--grammar-macros-regexp-1)))
    (or (and regexp (re-search-forward regexp end t))
        (and (setq regexp (semantic--grammar-macros-regexp-2))
             (re-search-forward regexp end t)))))
\f
;;;;
;;;; Define major mode
;;;;

(define-obsolete-variable-alias 'semantic-grammar-syntax-table
  'semantic-grammar-mode-syntax-table "24.1")
(defvar semantic-grammar-mode-syntax-table
  (let ((table (make-syntax-table (standard-syntax-table))))
    (modify-syntax-entry ?\: "."     table) ;; COLON
    (modify-syntax-entry ?\> "."     table) ;; GT
    (modify-syntax-entry ?\< "."     table) ;; LT
    (modify-syntax-entry ?\| "."     table) ;; OR
    (modify-syntax-entry ?\; ". 12"  table) ;; SEMI, Comment start ;;
    (modify-syntax-entry ?\n ">"     table) ;; Comment end
    (modify-syntax-entry ?\" "\""    table) ;; String
    (modify-syntax-entry ?\% "w"     table) ;; Word
    (modify-syntax-entry ?\- "_"     table) ;; Symbol
    (modify-syntax-entry ?\. "_"     table) ;; Symbol
    (modify-syntax-entry ?\\ "\\"    table) ;; Quote
    (modify-syntax-entry ?\` "'"     table) ;; Prefix ` (backquote)
    (modify-syntax-entry ?\' "'"     table) ;; Prefix ' (quote)
    (modify-syntax-entry ?\, "'"     table) ;; Prefix , (comma)
    (modify-syntax-entry ?\# "'"     table) ;; Prefix # (sharp)
    table)
  "Syntax table used in a Semantic grammar buffers.")

(defvar semantic-grammar-mode-hook nil
  "Hook run when starting Semantic grammar mode.")

(defvar semantic-grammar-mode-keywords-1
  `(("\\(\\<%%\\>\\|\\<%[{}]\\)"
     0 font-lock-reference-face)
    ("\\(%\\)\\(\\(\\sw\\|\\s_\\)+\\)"
     (1 font-lock-reference-face)
     (2 font-lock-keyword-face))
    ("\\<error\\>"
     0 (unless (semantic-grammar-in-lisp-p) 'bold))
    ("^\\(\\(\\sw\\|\\s_\\)+\\)[ \n\r\t]*:"
     1 font-lock-function-name-face)
    (semantic--grammar-macros-matcher
     1 ,(if (boundp 'font-lock-builtin-face)
            'font-lock-builtin-face
          'font-lock-preprocessor-face))
    ("\\$\\(\\sw\\|\\s_\\)*"
     0 font-lock-variable-name-face)
    ("<\\(\\(\\sw\\|\\s_\\)+\\)>"
     1 font-lock-type-face)
    (,semantic-grammar-lex-c-char-re
     0 ,(if (boundp 'font-lock-constant-face)
            'font-lock-constant-face
          'font-lock-string-face) t)
    ;; Must highlight :keyword here, because ':' is a punctuation in
    ;; grammar mode!
    ("[\r\n\t ]+:\\sw+\\>"
     0 font-lock-builtin-face)
    ;; ;; Append the Semantic keywords
    ;; ,@semantic-fw-font-lock-keywords
    )
  "Font Lock keywords used to highlight Semantic grammar buffers.")

(defvar semantic-grammar-mode-keywords-2
  (append semantic-grammar-mode-keywords-1
	  (if (boundp 'lisp-font-lock-keywords-1)
	      lisp-font-lock-keywords-1
	    lisp-el-font-lock-keywords-1))
  "Font Lock keywords used to highlight Semantic grammar buffers.")

(defvar semantic-grammar-mode-keywords-3
  (append semantic-grammar-mode-keywords-1
	  (if (boundp 'lisp-font-lock-keywords-2)
	      lisp-font-lock-keywords-2
	    lisp-el-font-lock-keywords-2))
  "Font Lock keywords used to highlight Semantic grammar buffers.")

(defvar semantic-grammar-mode-keywords
  semantic-grammar-mode-keywords-1
  "Font Lock keywords used to highlight Semantic grammar buffers.")

(define-obsolete-variable-alias 'semantic-grammar-map
  'semantic-grammar-mode-map "24.1")
(defvar semantic-grammar-mode-map
  (let ((km (make-sparse-keymap)))

    (define-key km "|" 'semantic-grammar-electric-punctuation)
    (define-key km ";" 'semantic-grammar-electric-punctuation)
    (define-key km "%" 'semantic-grammar-electric-punctuation)
    (define-key km "(" 'semantic-grammar-electric-punctuation)
    (define-key km ")" 'semantic-grammar-electric-punctuation)
    (define-key km ":" 'semantic-grammar-electric-punctuation)

    (define-key km "\t"       'semantic-grammar-indent)
    (define-key km "\M-\t"    'semantic-grammar-complete)
    (define-key km "\C-c\C-c" 'semantic-grammar-create-package)
    (define-key km "\C-cm"    'semantic-grammar-find-macro-expander)
    (define-key km "\C-cik"    'semantic-grammar-insert-keyword)
;;  (define-key km "\C-cc"    'semantic-grammar-generate-and-load)
;;  (define-key km "\C-cr"    'semantic-grammar-generate-one-rule)

    km)
  "Keymap used in `semantic-grammar-mode'.")

(defvar semantic-grammar-menu
  '("Grammar"
    ["Indent Line" semantic-grammar-indent]
    ["Complete Symbol" semantic-grammar-complete]
    ["Find Macro" semantic-grammar-find-macro-expander]
    "--"
    ["Insert %keyword" semantic-grammar-insert-keyword]
    "--"
    ["Update Lisp Package" semantic-grammar-create-package]
    ["Recreate Lisp Package" semantic-grammar-recreate-package]
    )
  "Common semantic grammar menu.")

(defun semantic-grammar-setup-menu-emacs (symbol mode-menu)
  "Setup a GNU Emacs grammar menu in variable SYMBOL.
MODE-MENU is an optional specific menu whose items are appended to the
common grammar menu."
  (let ((items (make-symbol "items")))
    `(unless (boundp ',symbol)
       (easy-menu-define ,symbol (current-local-map)
         "Grammar Menu" semantic-grammar-menu)
       (let ((,items (cdr ,mode-menu)))
         (when ,items
           (easy-menu-add-item ,symbol nil "--")
           (while ,items
             (easy-menu-add-item ,symbol nil (car ,items))
             (setq ,items (cdr ,items))))))
    ))

(defun semantic-grammar-setup-menu-xemacs (symbol mode-menu)
  "Setup an XEmacs grammar menu in variable SYMBOL.
MODE-MENU is an optional specific menu whose items are appended to the
common grammar menu."
  (declare (obsolete nil "28.1"))
  (let ((items (make-symbol "items"))
        (path (make-symbol "path")))
    `(progn
       (unless (boundp ',symbol)
         (easy-menu-define ,symbol nil
           "Grammar Menu" (copy-sequence semantic-grammar-menu)))
       (easy-menu-add ,symbol)
       (let ((,items (cdr ,mode-menu))
             (,path (list (car ,symbol))))
         (when ,items
           (easy-menu-add-item nil ,path "--")
           (while ,items
             (easy-menu-add-item nil ,path (car ,items))
             (setq ,items (cdr ,items))))))
    ))

(defmacro semantic-grammar-setup-menu (&optional mode-menu)
  "Setup a mode local grammar menu.
MODE-MENU is an optional specific menu whose items are appended to the
common grammar menu."
  (semantic-grammar-setup-menu-emacs
   (intern (format "%s-menu" major-mode)) mode-menu))

(defsubst semantic-grammar-in-lisp-p ()
  "Return non-nil if point is in Lisp code."
  (or (>= (point) (semantic-grammar-epilogue-start))
      (condition-case nil
          (save-excursion
            (up-list -1)
            t)
        (error nil))))

(defun semantic-grammar-edits-new-change-hook-fcn (overlay)
  "Function set into `semantic-edits-new-change-hook'.
Argument OVERLAY is the overlay created to mark the change.
When OVERLAY marks a change in the scope of a nonterminal tag extend
the change bounds to encompass the whole nonterminal tag."
  (let ((outer (car (semantic-find-tag-by-overlay-in-region
                     (semantic-edits-os overlay)
                     (semantic-edits-oe overlay)))))
    (if (semantic-tag-of-class-p outer 'nonterminal)
        (move-overlay overlay
                      (semantic-tag-start outer)
                      (semantic-tag-end outer)))))

(define-derived-mode semantic-grammar-mode
  fundamental-mode "Semantic Grammar Framework"
  "Initialize a buffer for editing Semantic grammars.

\\{semantic-grammar-mode-map}"
  (set (make-local-variable 'parse-sexp-ignore-comments) t)
  (set (make-local-variable 'comment-start) ";;")
  ;; Look within the line for a ; following an even number of backslashes
  ;; after either a non-backslash or the line beginning.
  (set (make-local-variable 'comment-start-skip)
       "\\(\\(^\\|[^\\\n]\\)\\(\\\\\\\\\\)*\\);+ *")
  (set (make-local-variable 'indent-line-function)
       'semantic-grammar-indent)
  (set (make-local-variable 'fill-paragraph-function)
       'lisp-fill-paragraph)
  (set (make-local-variable 'font-lock-multiline)
       'undecided)
  (set (make-local-variable 'font-lock-defaults)
       '((semantic-grammar-mode-keywords
          semantic-grammar-mode-keywords-1
          semantic-grammar-mode-keywords-2
          semantic-grammar-mode-keywords-3)
         nil  ;; perform string/comment fontification
         nil  ;; keywords are case sensitive.
         ;; This puts _ & - as a word constituent,
         ;; simplifying our keywords significantly
         ((?_ . "w") (?- . "w"))))
  ;; Setup Semantic to parse grammar
  (semantic-grammar-wy--install-parser)
  (setq semantic-lex-comment-regex ";;"
        semantic-lex-analyzer 'semantic-grammar-lexer
        semantic-type-relation-separator-character '(":")
        semantic-symbol->name-assoc-list
        '(
          (code         . "Setup Code")
          (keyword      . "Keyword")
          (token        . "Token")
          (nonterminal  . "Nonterminal")
          (rule         . "Rule")
          ))
  (set (make-local-variable 'semantic-format-face-alist)
       '(
         (code         . default)
         (keyword      . font-lock-keyword-face)
         (token        . font-lock-type-face)
         (nonterminal  . font-lock-function-name-face)
         (rule         . default)
         ))
  (set (make-local-variable 'semantic-stickyfunc-sticky-classes)
       '(nonterminal))
  ;; Before each change, clear the cached regexp used to highlight
  ;; macros local in this grammar.
  (add-hook 'before-change-functions
            'semantic--grammar-clear-macros-regexp-2 nil t)
  ;; Handle safe re-parse of grammar rules.
  (add-hook 'semantic-edits-new-change-functions
            'semantic-grammar-edits-new-change-hook-fcn
            nil t))
\f
;;;;
;;;; Useful commands
;;;;

(defvar semantic-grammar-skip-quoted-syntax-table
  (let ((st (copy-syntax-table semantic-grammar-mode-syntax-table)))
    (modify-syntax-entry ?\' "$" st)
    st)
  "Syntax table to skip a whole quoted expression in grammar code.
Consider quote as a \"paired delimiter\", so `forward-sexp' will skip
whole quoted expression.")

(defsubst semantic-grammar-backward-item ()
  "Move point to beginning of the previous grammar item."
  (forward-comment (- (point-max)))
  (if (zerop (skip-syntax-backward "."))
      (if (eq (char-before) ?\')
          (with-syntax-table
              ;; Can't be Lisp code here!  Temporarily consider quote
              ;; as a "paired delimiter", so `forward-sexp' can skip
              ;; the whole quoted expression.
              semantic-grammar-skip-quoted-syntax-table
            (forward-sexp -1))
        (forward-sexp -1))))

(defun semantic-grammar-anchored-indentation ()
  "Return indentation based on previous anchor character found."
  (let (indent)
    (save-excursion
      (while (not indent)
        (semantic-grammar-backward-item)
        (cond
         ((bobp)
          (setq indent 0))
         ((looking-at ":\\(\\s-\\|$\\)")
          (setq indent (current-column))
          (forward-char)
          (skip-syntax-forward "-")
          (if (eolp) (setq indent 2))
          )
         ((and (looking-at "[;%]")
               (not (looking-at "\\<%prec\\>")))
          (setq indent 0)
          ))))
    indent))

(defun semantic-grammar-do-grammar-indent ()
  "Indent a line of grammar.
When called the point is not in Lisp code."
  (let (indent n)
    (save-excursion
      (beginning-of-line)
      (skip-syntax-forward "-")
      (setq indent (current-column))
      (cond
       ((or (bobp)
            (looking-at "\\(\\w\\|\\s_\\)+\\s-*:")
            (and (looking-at "%")
                 (not (looking-at "%prec\\>"))))
        (setq n 0))
       ((looking-at ":")
        (setq n 2))
       ((and (looking-at ";;")
             (save-excursion (forward-comment (point-max))
                             (looking-at ":")))
        (setq n 1))
       (t
        (setq n (semantic-grammar-anchored-indentation))
        (unless (zerop n)
          (cond
           ((looking-at ";;")
            (setq n (1- n)))
           ((looking-at "[|;]")
            )
           (t
            (setq n (+ n 2)))))))
      (when (/= n indent)
        (beginning-of-line)
        (delete-horizontal-space)
        (indent-to n)))))

(defvar semantic-grammar-brackets-as-parens-syntax-table
  (let ((st (copy-syntax-table emacs-lisp-mode-syntax-table)))
    (modify-syntax-entry ?\{ "(}  " st)
    (modify-syntax-entry ?\} "){  " st)
    st)
  "Syntax table that consider brackets as parenthesis.
So `lisp-indent-line' will work inside bracket blocks.")

(defun semantic-grammar-do-lisp-indent ()
  "Maybe run the Emacs Lisp indenter on a line of code.
Return nil if not in a Lisp expression."
    (condition-case nil
        (save-excursion
          (beginning-of-line)
          (skip-chars-forward "\t ")
          (let ((first (point)))
            (or (>= first (semantic-grammar-epilogue-start))
                (up-list -1))
            (condition-case nil
                (while t
                  (up-list -1))
              (error nil))
            (beginning-of-line)
            (save-restriction
              (narrow-to-region (point) first)
              (goto-char (point-max))
              (with-syntax-table
                  ;; Temporarily consider brackets as parenthesis so
                  ;; `lisp-indent-line' can indent Lisp code inside
                  ;; brackets.
                  semantic-grammar-brackets-as-parens-syntax-table
                (lisp-indent-line))))
          t)
      (error nil)))

(defun semantic-grammar-indent ()
  "Indent the current line.
Use the Lisp or grammar indenter depending on point location."
  (interactive)
  (let ((orig (point))
        first)
    (or (semantic-grammar-do-lisp-indent)
        (semantic-grammar-do-grammar-indent))
    (setq first (save-excursion
                  (beginning-of-line)
                  (skip-chars-forward "\t ")
                  (point)))
    (if (or (< orig first) (/= orig (point)))
        (goto-char first))))

(defun semantic-grammar-electric-punctuation ()
  "Insert and reindent for the symbol just typed in."
  (interactive)
  (self-insert-command 1)
  (save-excursion
    (semantic-grammar-indent)))

(defun semantic-grammar-complete ()
  "Attempt to complete the symbol under point.
Completion is position sensitive.  If the cursor is in a match section of
a rule, then nonterminals symbols are scanned.  If the cursor is in a Lisp
expression then Lisp symbols are completed."
  (interactive)
  (if (semantic-grammar-in-lisp-p)
      ;; We are in lisp code.  Do lisp completion.
      (let ((completion-at-point-functions
             (append '(lisp-completion-at-point)
                     completion-at-point-functions)))
        (completion-at-point))
    ;; We are not in lisp code.  Do rule completion.
    (let* ((nonterms (semantic-find-tags-by-class 'nonterminal (current-buffer)))
           (sym (car (semantic-ctxt-current-symbol)))
           (ans (try-completion sym nonterms)))
      (cond ((eq ans t)
             ;; All done
             (message "Symbols is already complete"))
            ((and (stringp ans) (string= ans sym))
             ;; Max matchable.  Show completions.
	     (with-output-to-temp-buffer "*Completions*"
	       (display-completion-list (all-completions sym nonterms)))
	     )
            ((stringp ans)
             ;; Expand the completions
             (forward-sexp -1)
             (delete-region (point) (progn (forward-sexp 1) (point)))
             (insert ans))
            (t (message "No Completions."))
            ))
    ))

(defun semantic-grammar-insert-keyword (name)
  "Insert a new %keyword declaration with NAME.
Assumes it is typed in with the correct casing."
  (interactive "sKeyword: ")
  (if (not (bolp)) (insert "\n"))
  (insert "%keyword " (upcase name) "        \"" name "\"
%put     " (upcase name) " summary
\"\"\n")
  (forward-char -2))

;;; Macro facilities
;;

(defsubst semantic--grammar-macro-function-tag (name)
  "Search for a function tag for the grammar macro with name NAME.
Return the tag found or nil if not found."
  (car (semantic-find-tags-by-class
        'function
        (or (semantic-find-tags-by-name name (current-buffer))
            (and (featurep 'semantic/db)
                 semanticdb-current-database
                 (cdar (semanticdb-find-tags-by-name name nil t)))))))

(defsubst semantic--grammar-macro-lib-part (def)
  "Return the library part of the grammar macro defined by DEF."
  (let ((suf (format "-%s\\'" (regexp-quote (symbol-name (car def)))))
        (fun (symbol-name (cdr def))))
    (substring fun 0 (string-match suf fun))))

(defun semantic--grammar-macro-compl-elt (def &optional full)
  "Return a completion entry for the grammar macro defined by DEF.
If optional argument FULL is non-nil qualify the macro name with the
library found in DEF."
  (let ((mac (car def))
        (lib (semantic--grammar-macro-lib-part def)))
    (cons (if full
              (format "%s/%s" mac lib)
            (symbol-name mac))
          (list mac lib))))

(defun semantic--grammar-macro-compl-dict ()
  "Return a completion dictionary of macro definitions."
  (let ((defs (semantic-grammar-macros))
        def dups dict)
    (while defs
      (setq def  (car defs)
            defs (cdr defs))
      (if (or (assoc (car def) defs) (assoc (car def) dups))
          (push def dups)
        (push (semantic--grammar-macro-compl-elt def) dict)))
    (while dups
      (setq def  (car dups)
            dups (cdr dups))
      (push (semantic--grammar-macro-compl-elt def t) dict))
    dict))

(defun semantic-grammar-find-macro-expander (macro-name library)
  "Visit the Emacs Lisp library where a grammar macro is implemented.
MACRO-NAME is a symbol that identifies a grammar macro.
LIBRARY is the name (sans extension) of the Emacs Lisp library where
to start searching the macro implementation.  Lookup in included
libraries, if necessary.
Find a function tag (in current tags table) whose name contains MACRO-NAME.
Select the buffer containing the tag's definition, and move point there."
  (interactive
   (let* ((dic (semantic--grammar-macro-compl-dict))
          (def (assoc (completing-read "Macro: " dic nil 1) dic)))
     (or (cdr def) '(nil nil))))
  (when (and macro-name library)
    (let* ((lib (format "%s.el" library))
           (buf (find-file-noselect (or (locate-library lib t) lib)))
           (tag (with-current-buffer buf
                  (semantic--grammar-macro-function-tag
                   (format "%s-%s" library macro-name)))))
      (if tag
          (progn
	    (require 'semantic/decorate)
            (pop-to-buffer (semantic-tag-buffer tag))
            (goto-char (semantic-tag-start tag))
            (semantic-momentary-highlight-tag tag))
        (pop-to-buffer buf)
        (message "No expander found in library %s for macro %s"
                 library macro-name)))))

;;; Additional help
;;

(defvar semantic-grammar-syntax-help
  '(
    ;; Lexical Symbols
    ("symbol" . "Syntax: A symbol of alpha numeric and symbol characters")
    ("number" . "Syntax: Numeric characters.")
    ("punctuation" . "Syntax: Punctuation character.")
    ("semantic-list" . "Syntax: A list delimited by any valid list characters")
    ("open-paren" . "Syntax: Open Parenthesis character")
    ("close-paren" . "Syntax: Close Parenthesis character")
    ("string" . "Syntax: String character delimited text")
    ("comment" . "Syntax: Comment character delimited text")
    ;; Special Macros
    ("EMPTY" . "Syntax: Match empty text")
    ("ASSOC" . "Lambda Key: (ASSOC key1 value1 key2 value2 ...)")
    ("EXPAND" . "Lambda Key: (EXPAND <list id> <rule>)")
    ("EXPANDFULL" . "Lambda Key: (EXPANDFULL <list id> <rule>)")
    ;; Tag Generator Macros
    ("TAG" . "Generic Tag Generation: (TAG <name> <tag-class> [ :key value ]*)")
    ("VARIABLE-TAG" . "(VARIABLE-TAG <name> <lang-type> <default-value> [ :key value ]*)")
    ("FUNCTION-TAG" . "(FUNCTION-TAG <name> <lang-type> <arg-list> [ :key value ]*)")
    ("TYPE-TAG" . "(TYPE-TAG <name> <lang-type> <part-list> <parents> [ :key value ]*)")
    ("INCLUDE-TAG" . "(INCLUDE-TAG <name> <system-flag> [ :key value ]*)")
    ("PACKAGE-TAG" . "(PACKAGE-TAG <name> <detail> [ :key value ]*)")
    ("CODE-TAG" . "(CODE-TAG <name> <detail> [ :key value ]*)")
    ("ALIAS-TAG" . "(ALIAS-TAG <name> <aliasclass> <definition> [:key value]*)")
    ;; Special value macros
    ("$1" . "Match Value: Value from match list in slot 1")
    ("$2" . "Match Value: Value from match list in slot 2")
    ("$3" . "Match Value: Value from match list in slot 3")
    ("$4" . "Match Value: Value from match list in slot 4")
    ("$5" . "Match Value: Value from match list in slot 5")
    ("$6" . "Match Value: Value from match list in slot 6")
    ("$7" . "Match Value: Value from match list in slot 7")
    ("$8" . "Match Value: Value from match list in slot 8")
    ("$9" . "Match Value: Value from match list in slot 9")
    ;; Same, but with annoying , in front.
    (",$1" . "Match Value: Value from match list in slot 1")
    (",$2" . "Match Value: Value from match list in slot 2")
    (",$3" . "Match Value: Value from match list in slot 3")
    (",$4" . "Match Value: Value from match list in slot 4")
    (",$5" . "Match Value: Value from match list in slot 5")
    (",$6" . "Match Value: Value from match list in slot 6")
    (",$7" . "Match Value: Value from match list in slot 7")
    (",$8" . "Match Value: Value from match list in slot 8")
    (",$9" . "Match Value: Value from match list in slot 9")
    )
  "Association of syntax elements, and the corresponding help.")

(defvar semantic-grammar-eldoc-last-data (cons nil nil))

(defun semantic--docstring-format-sym-doc (prefix doc &optional face)
  "Combine PREFIX and DOC, and shorten the result to fit in the echo area.

When PREFIX is a symbol, propertize its symbol name with FACE
before combining it with DOC.  If FACE is not provided, just
apply the nil face.

See also: `eldoc-echo-area-use-multiline-p'."
  ;; Hoisted from old `eldoc-docstring-format-sym-doc'.
  ;; If the entire line cannot fit in the echo area, the symbol name may be
  ;; truncated or eliminated entirely from the output to make room for the
  ;; description.
  (when (symbolp prefix)
    (setq prefix (concat (propertize (symbol-name prefix) 'face face) ": ")))
  (let* ((ea-multi eldoc-echo-area-use-multiline-p)
         ;; Subtract 1 from window width since emacs will not write
         ;; any chars to the last column, or in later versions, will
         ;; cause a wraparound and resize of the echo area.
         (ea-width (1- (window-width (minibuffer-window))))
         (strip (- (+ (length prefix)
                      (length doc))
                   ea-width)))
    (cond ((or (<= strip 0)
               (eq ea-multi t)
               (and ea-multi (> (length doc) ea-width)))
           (concat prefix doc))
          ((> (length doc) ea-width)
           (substring (format "%s" doc) 0 ea-width))
          ((>= strip (string-match-p ":? *\\'" prefix))
           doc)
          (t
           ;; Show the end of the partial symbol name, rather
           ;; than the beginning, since the former is more likely
           ;; to be unique given package namespace conventions.
           (concat (substring prefix strip) doc)))))

(defun semantic-grammar-eldoc-get-macro-docstring (macro expander)
  "Return a one-line docstring for the given grammar MACRO.
EXPANDER is the name of the function that expands MACRO."
  (require 'eldoc)
  (cond
   ((eq expander (car semantic-grammar-eldoc-last-data))
    (cdr semantic-grammar-eldoc-last-data))
   ((fboundp 'eldoc-function-argstring) ;; Emacs<25
    (let* ((doc (help-split-fundoc (documentation expander t) expander)))
      (cond
       (doc
        (setq doc (car doc))
        (string-match "\\`[^ )]* ?" doc)
        (setq doc (concat "(" (substring doc (match-end 0)))))
       (t
        (setq doc (eldoc-function-argstring expander))))
      (when doc
        (setq doc
	      (semantic--docstring-format-sym-doc
	       macro (format "==> %s %s" expander doc) 'default))
        (setq semantic-grammar-eldoc-last-data (cons expander doc)))
      doc))
   ((fboundp 'elisp-get-fnsym-args-string) ;; Emacs≥25
    (concat (propertize (symbol-name macro)
                         'face 'font-lock-keyword-face)
             " ==> "
             (propertize (symbol-name macro)
                         'face 'font-lock-function-name-face)
             ": "
             (elisp-get-fnsym-args-string expander nil )))))

(define-mode-local-override semantic-idle-summary-current-symbol-info
  semantic-grammar-mode ()
  "Display additional eldoc information about grammar syntax elements.
Syntax element is the current symbol at point.
If it is associated a help string in `semantic-grammar-syntax-help',
return that string.
If it is a macro name, return a description of the associated expander
function parameter list.
If it is a function name, return a description of this function
parameter list.
It it is a variable name, return a brief (one-line) documentation
string for the variable.
If a default description of the current context can be obtained,
return it.
Otherwise return nil."
  (require 'eldoc)
  (let* ((elt (car (semantic-ctxt-current-symbol)))
         (val (and elt (cdr (assoc elt semantic-grammar-syntax-help)))))
    (when (and (not val) elt (semantic-grammar-in-lisp-p))
      ;; Ensure to load macro definitions before doing `intern-soft'.
      (setq val (semantic-grammar-macros)
            elt (intern-soft elt)
            val (and elt (cdr (assq elt val))))
      (cond
       ;; Grammar macro
       ((and val (fboundp val))
        (setq val (semantic-grammar-eldoc-get-macro-docstring elt val)))
       ;; Function
       ((and elt (fboundp elt))
        (setq val (if (fboundp 'eldoc-get-fnsym-args-string)
                      (eldoc-get-fnsym-args-string elt)
                    (elisp-get-fnsym-args-string elt))))
       ;; Variable
       ((and elt (boundp elt))
        (setq val (if (fboundp 'eldoc-get-var-docstring)
                      (eldoc-get-var-docstring elt)
                    (elisp-get-var-docstring elt))))
       (t nil)))
    (or val (semantic-idle-summary-current-symbol-info-default))))

(define-mode-local-override semantic-tag-boundary-p
  semantic-grammar-mode (tag)
  "Return non-nil for tags that should have a boundary drawn.
Only tags of type `nonterminal' will be so marked."
  (let ((c (semantic-tag-class tag)))
    (eq c 'nonterminal)))

(define-mode-local-override semantic-ctxt-current-function
  semantic-grammar-mode (&optional point)
  "Determine the name of the current function at POINT."
  (save-excursion
    (and point (goto-char point))
    (when (semantic-grammar-in-lisp-p)
      (with-mode-local emacs-lisp-mode
        (semantic-ctxt-current-function)))))

(define-mode-local-override semantic-ctxt-current-argument
  semantic-grammar-mode (&optional point)
  "Determine the argument index of the called function at POINT."
  (save-excursion
    (and point (goto-char point))
    (when (semantic-grammar-in-lisp-p)
      (with-mode-local emacs-lisp-mode
        (semantic-ctxt-current-argument)))))

(define-mode-local-override semantic-ctxt-current-assignment
  semantic-grammar-mode (&optional point)
  "Determine the tag being assigned into at POINT."
  (save-excursion
    (and point (goto-char point))
    (when (semantic-grammar-in-lisp-p)
      (with-mode-local emacs-lisp-mode
        (semantic-ctxt-current-assignment)))))

(define-mode-local-override semantic-ctxt-current-class-list
  semantic-grammar-mode (&optional point)
  "Determine the class of tags that can be used at POINT."
  (save-excursion
    (and point (goto-char point))
    (if (semantic-grammar-in-lisp-p)
        (with-mode-local emacs-lisp-mode
          (semantic-ctxt-current-class-list))
      '(nonterminal token keyword))))

(define-mode-local-override semantic-ctxt-current-mode
  semantic-grammar-mode (&optional point)
  "Return the major mode active at POINT.
POINT defaults to the value of point in current buffer.
Return `emacs-lisp-mode' is POINT is within Lisp code, otherwise
return the current major mode."
  (save-excursion
    (and point (goto-char point))
    (if (semantic-grammar-in-lisp-p)
        'emacs-lisp-mode
      (semantic-ctxt-current-mode-default))))

(define-mode-local-override semantic-format-tag-abbreviate
  semantic-grammar-mode (tag &optional parent color)
  "Return a string abbreviation of TAG.
Optional PARENT is not used.
Optional COLOR is used to flag if color is added to the text."
  (let ((class (semantic-tag-class tag))
        (name (semantic-format-tag-name tag parent color)))
    (cond
     ((eq class 'nonterminal)
      (concat name ":"))
     ((eq class 'setting)
      "%settings%")
     ((memq class '(rule keyword))
      name)
     (t
      (concat "%" (symbol-name class) " " name)))))

(define-mode-local-override semantic-format-tag-summarize
  semantic-grammar-mode (tag &optional parent color)
  "Return a string summarizing TAG.
Optional PARENT is not used.
Optional argument COLOR determines if color is added to the text."
  (let ((class (semantic-tag-class tag))
        (name (semantic-format-tag-name tag parent color))
        (label nil)
        (desc nil))
    (cond
     ((eq class 'nonterminal)
      (setq label "Nonterminal: "
            desc (format
                  " with %d match lists."
                  (length (semantic-tag-components tag)))))
     ((eq class 'keyword)
      (setq label "Keyword: ")
      (let (summary)
        (semantic--find-tags-by-function
         #'(lambda (put)
             (unless summary
               (setq summary (cdr (assoc "summary"
                                         (semantic-tag-get-attribute
                                          put :value))))))
         ;; Get `put' tag with TAG name.
         (semantic-find-tags-by-name-regexp
          (regexp-quote (semantic-tag-name tag))
          (semantic-find-tags-by-class 'put (current-buffer))))
        (setq desc (concat " = "
                           (semantic-tag-get-attribute tag :value)
                           (if summary
                               (concat " - " (read summary))
                             "")))))
     ((eq class 'token)
      (setq label "Token: ")
      (let ((val   (semantic-tag-get-attribute tag :value))
            (names (semantic-tag-get-attribute tag :rest))
            (type  (semantic-tag-type tag)))
        (if names
            (setq name (mapconcat 'identity (cons name names) " ")))
        (setq desc (concat
                    (if type
                        (format " <%s>" type)
                      "")
                    (if val
                        (format "%s%S" val (if type " " ""))
                      "")))))
     ((eq class 'assoc)
      (setq label "Assoc: ")
      (let ((val   (semantic-tag-get-attribute tag :value))
            (type  (semantic-tag-type tag)))
        (setq desc (concat
                    (if type
                        (format " <%s>" type)
                      "")
                    (if val
                        (concat " " (mapconcat 'identity val " "))
                      "")))))
     (t
      (setq desc (semantic-format-tag-abbreviate tag parent color))))
    (if (and color label)
        (setq label (semantic--format-colorize-text label 'label)))
    (if (and color label desc)
        (setq desc (semantic--format-colorize-text desc 'comment)))
    (if label
        (concat label name desc)
      ;; Just a description is the abbreviated version
      desc)))

;;; Semantic Analysis

(define-mode-local-override semantic-analyze-current-context
  semantic-grammar-mode (point)
  "Provide a semantic analysis object describing a context in a grammar."
  (if (semantic-grammar-in-lisp-p)
      (with-mode-local emacs-lisp-mode
	(semantic-analyze-current-context point))

    (let* ((context-return nil)
	   (prefixandbounds (semantic-ctxt-current-symbol-and-bounds))
	   (prefix (car prefixandbounds))
	   (bounds (nth 2 prefixandbounds))
	   (prefixsym nil)
	   (prefixclass (semantic-ctxt-current-class-list))
	   )

      ;; Do context for rules when in a match list.
      (setq prefixsym
	    (semantic-find-first-tag-by-name
	     (car prefix)
	     (current-buffer)))

      (setq context-return
	    (semantic-analyze-context
	     :buffer (current-buffer)
	     :scope nil
	     :bounds bounds
	     :prefix (if prefixsym
			 (list prefixsym)
		       prefix)
	     :prefixtypes nil
	     :prefixclass prefixclass
	     ))

      context-return)))

(define-mode-local-override semantic-analyze-possible-completions
  semantic-grammar-mode (context &rest flags)
  "Return a list of possible completions based on CONTEXT."
  (require 'semantic/analyze/complete)
  (if (semantic-grammar-in-lisp-p)
      (with-mode-local emacs-lisp-mode
	(semantic-analyze-possible-completions context))
    (with-current-buffer (oref context buffer)
      (let* ((prefix (car (reverse (oref context prefix))))
	     (completetext (cond ((semantic-tag-p prefix)
				  (semantic-tag-name prefix))
				 ((stringp prefix)
				  prefix)
				 ((stringp (car prefix))
				  (car prefix))))
	     (tags (semantic-find-tags-for-completion completetext
						      (current-buffer))))
	(semantic-analyze-tags-of-class-list
	 tags (oref context prefixclass)))
      )))

(provide 'semantic/grammar)

\f
;; Local variables:
;; generated-autoload-load-name: "semantic/grammar"
;; End:

;;; semantic/grammar.el ends here

debug log:

solving 6cd4832165 ...
found 6cd4832165 in https://git.savannah.gnu.org/cgit/emacs.git

(*) 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).