/usr/share/fpcsrc/2.6.2/compiler/pdecvar.pas is in fpc-source-2.6.2 2.6.2-8.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | {
Copyright (c) 1998-2002 by Florian Klaempfl
Parses variable declarations. Used for var statement and record
definitions
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 2 of the License, or
(at your option) any later version.
This program 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
****************************************************************************
}
unit pdecvar;
{$i fpcdefs.inc}
interface
uses
symsym,symdef;
type
tvar_dec_option=(vd_record,vd_object,vd_threadvar,vd_class);
tvar_dec_options=set of tvar_dec_option;
function read_property_dec(is_classproperty:boolean;astruct:tabstractrecorddef):tpropertysym;
procedure read_var_decls(options:Tvar_dec_options);
procedure read_record_fields(options:Tvar_dec_options);
procedure read_public_and_external(vs: tabstractvarsym);
procedure try_consume_sectiondirective(var asection: ansistring);
implementation
uses
SysUtils,
{ common }
cutils,cclasses,
{ global }
globtype,globals,tokens,verbose,constexp,
systems,
{ symtable }
symconst,symbase,symtype,symtable,defutil,defcmp,
fmodule,htypechk,
{ pass 1 }
node,pass_1,aasmdata,
nmat,nadd,ncal,nset,ncnv,ninl,ncon,nld,nflw,nmem,nutils,
{ codegen }
ncgutil,
{ parser }
scanner,
pbase,pexpr,ptype,ptconst,pdecsub,
{ link }
import
;
function read_property_dec(is_classproperty:boolean;astruct:tabstractrecorddef):tpropertysym;
{ convert a node tree to symlist and return the last
symbol }
function parse_symlist(pl:tpropaccesslist;var def:tdef):boolean;
var
idx : longint;
sym : tsym;
srsymtable : TSymtable;
st : TSymtable;
p : tnode;
begin
result:=true;
def:=nil;
if token=_ID then
begin
if assigned(astruct) then
sym:=search_struct_member(astruct,pattern)
else
searchsym(pattern,sym,srsymtable);
if assigned(sym) then
begin
if assigned(astruct) and
not is_visible_for_object(sym,astruct) then
Message(parser_e_cant_access_private_member);
case sym.typ of
fieldvarsym :
begin
if (symtablestack.top.currentvisibility<>vis_private) then
addsymref(sym);
pl.addsym(sl_load,sym);
def:=tfieldvarsym(sym).vardef;
end;
procsym :
begin
if (symtablestack.top.currentvisibility<>vis_private) then
addsymref(sym);
pl.addsym(sl_call,sym);
end;
else
begin
Message1(parser_e_illegal_field_or_method,orgpattern);
def:=generrordef;
result:=false;
end;
end;
end
else
begin
Message1(parser_e_illegal_field_or_method,orgpattern);
def:=generrordef;
result:=false;
end;
consume(_ID);
repeat
case token of
_ID,
_SEMICOLON :
begin
break;
end;
_POINT :
begin
consume(_POINT);
if assigned(def) then
begin
st:=def.GetSymtable(gs_record);
if assigned(st) then
begin
sym:=tsym(st.Find(pattern));
if not(assigned(sym)) and is_object(def) then
sym:=search_struct_member(tobjectdef(def),pattern);
if assigned(sym) then
begin
pl.addsym(sl_subscript,sym);
case sym.typ of
fieldvarsym :
def:=tfieldvarsym(sym).vardef;
else
begin
Message1(sym_e_illegal_field,orgpattern);
result:=false;
end;
end;
end
else
begin
Message1(sym_e_illegal_field,orgpattern);
result:=false;
end;
end
else
begin
Message(parser_e_invalid_qualifier);
result:=false;
end;
end
else
begin
Message(parser_e_invalid_qualifier);
result:=false;
end;
consume(_ID);
end;
_LECKKLAMMER :
begin
consume(_LECKKLAMMER);
repeat
if def.typ=arraydef then
begin
idx:=0;
p:=comp_expr(true,false);
if (not codegenerror) then
begin
if (p.nodetype=ordconstn) then
begin
{ type/range checking }
inserttypeconv(p,tarraydef(def).rangedef);
if (Tordconstnode(p).value<int64(low(longint))) or
(Tordconstnode(p).value>int64(high(longint))) then
message(parser_e_array_range_out_of_bounds)
else
idx:=Tordconstnode(p).value.svalue
end
else
Message(type_e_ordinal_expr_expected)
end;
pl.addconst(sl_vec,idx,p.resultdef);
p.free;
def:=tarraydef(def).elementdef;
end
else
begin
Message(parser_e_invalid_qualifier);
result:=false;
end;
until not try_to_consume(_COMMA);
consume(_RECKKLAMMER);
end;
else
begin
Message(parser_e_ill_property_access_sym);
result:=false;
break;
end;
end;
until false;
end
else
begin
Message(parser_e_ill_property_access_sym);
result:=false;
end;
end;
function allow_default_property(p : tpropertysym) : boolean;
begin
allow_default_property:=
(is_ordinal(p.propdef) or
{$ifndef cpu64bitaddr}
is_64bitint(p.propdef) or
{$endif cpu64bitaddr}
is_class(p.propdef) or
is_single(p.propdef) or
(p.propdef.typ in [classrefdef,pointerdef]) or
is_smallset(p.propdef)
) and not
(
(p.propdef.typ=arraydef) and
(ppo_indexed in p.propoptions)
) and not
(ppo_hasparameters in p.propoptions);
end;
procedure create_accessor_procsym(p: tpropertysym; pd: tprocdef; const prefix: string;
accesstype: tpropaccesslisttypes);
var
sym: tprocsym;
begin
handle_calling_convention(pd);
sym:=tprocsym.create(prefix+lower(p.realname));
symtablestack.top.insert(sym);
pd.procsym:=sym;
include(pd.procoptions,po_dispid);
include(pd.procoptions,po_global);
pd.visibility:=vis_private;
proc_add_definition(pd);
p.propaccesslist[accesstype].addsym(sl_call,sym);
p.propaccesslist[accesstype].procdef:=pd;
end;
procedure parse_dispinterface(p : tpropertysym; readpd,writepd: tprocdef;
var paranr: word);
var
hasread, haswrite: boolean;
pt: tnode;
hdispid: longint;
hparavs: tparavarsym;
begin
p.propaccesslist[palt_read].clear;
p.propaccesslist[palt_write].clear;
hasread:=true;
haswrite:=true;
if try_to_consume(_READONLY) then
haswrite:=false
else if try_to_consume(_WRITEONLY) then
hasread:=false;
if try_to_consume(_DISPID) then
begin
pt:=comp_expr(true,false);
if is_constintnode(pt) then
if (Tordconstnode(pt).value<int64(low(longint))) or (Tordconstnode(pt).value>int64(high(longint))) then
message(parser_e_range_check_error)
else
hdispid:=Tordconstnode(pt).value.svalue
else
Message(parser_e_dispid_must_be_ord_const);
pt.free;
end
else
hdispid:=tobjectdef(astruct).get_next_dispid;
{ COM property is simply a pair of methods, tagged with 'propertyget'
and 'propertyset' flags (or a single method if access is restricted).
Creating these implicit accessor methods also allows the rest of compiler
to handle dispinterface properties the same way as regular ones. }
if hasread then
begin
readpd.returndef:=p.propdef;
readpd.dispid:=hdispid;
readpd.proctypeoption:=potype_propgetter;
create_accessor_procsym(p,readpd,'get$',palt_read);
end;
if haswrite then
begin
{ add an extra parameter, a placeholder of the value to set }
inc(paranr);
hparavs:=tparavarsym.create('$value',10*paranr,vs_value,p.propdef,[]);
writepd.parast.insert(hparavs);
writepd.proctypeoption:=potype_propsetter;
writepd.dispid:=hdispid;
create_accessor_procsym(p,writepd,'put$',palt_write);
end;
end;
procedure add_index_parameter(var paranr: word; p: tpropertysym; readprocdef, writeprocdef: tprocdef);
var
hparavs: tparavarsym;
begin
inc(paranr);
hparavs:=tparavarsym.create('$index',10*paranr,vs_value,p.indexdef,[]);
readprocdef.parast.insert(hparavs);
hparavs:=tparavarsym.create('$index',10*paranr,vs_value,p.indexdef,[]);
writeprocdef.parast.insert(hparavs);
end;
var
sym : tsym;
srsymtable: tsymtable;
p : tpropertysym;
overridden : tsym;
varspez : tvarspez;
hdef : tdef;
arraytype : tdef;
def : tdef;
pt : tnode;
sc : TFPObjectList;
paranr : word;
i : longint;
ImplIntf : TImplementedInterface;
found : boolean;
hreadparavs,
hparavs : tparavarsym;
storedprocdef: tprocvardef;
readprocdef,
writeprocdef : tprocdef;
begin
{ Generate temp procdefs to search for matching read/write
procedures. the readprocdef will store all definitions }
paranr:=0;
readprocdef:=tprocdef.create(normal_function_level);
writeprocdef:=tprocdef.create(normal_function_level);
readprocdef.struct:=astruct;
writeprocdef.struct:=astruct;
if assigned(astruct) and is_classproperty then
begin
readprocdef.procoptions:=[po_staticmethod,po_classmethod];
writeprocdef.procoptions:=[po_staticmethod,po_classmethod];
end;
if token<>_ID then
begin
consume(_ID);
consume(_SEMICOLON);
exit;
end;
{ Generate propertysym and insert in symtablestack }
p:=tpropertysym.create(orgpattern);
p.visibility:=symtablestack.top.currentvisibility;
p.default:=longint($80000000);
if is_classproperty then
include(p.symoptions, sp_static);
symtablestack.top.insert(p);
consume(_ID);
{ property parameters ? }
if try_to_consume(_LECKKLAMMER) then
begin
if (p.visibility=vis_published) and
not (m_delphi in current_settings.modeswitches) then
Message(parser_e_cant_publish_that_property);
{ create a list of the parameters }
symtablestack.push(readprocdef.parast);
sc:=TFPObjectList.create(false);
repeat
if try_to_consume(_VAR) then
varspez:=vs_var
else if try_to_consume(_CONST) then
varspez:=vs_const
else if try_to_consume(_CONSTREF) then
varspez:=vs_constref
else if (m_out in current_settings.modeswitches) and try_to_consume(_OUT) then
varspez:=vs_out
else
varspez:=vs_value;
sc.clear;
repeat
inc(paranr);
hreadparavs:=tparavarsym.create(orgpattern,10*paranr,varspez,generrordef,[]);
readprocdef.parast.insert(hreadparavs);
sc.add(hreadparavs);
consume(_ID);
until not try_to_consume(_COMMA);
if try_to_consume(_COLON) then
begin
if try_to_consume(_ARRAY) then
begin
consume(_OF);
{ define range and type of range }
hdef:=tarraydef.create(0,-1,s32inttype);
{ define field type }
single_type(arraytype,[]);
tarraydef(hdef).elementdef:=arraytype;
end
else
single_type(hdef,[]);
end
else
hdef:=cformaltype;
for i:=0 to sc.count-1 do
begin
hreadparavs:=tparavarsym(sc[i]);
hreadparavs.vardef:=hdef;
{ also update the writeprocdef }
hparavs:=tparavarsym.create(hreadparavs.realname,hreadparavs.paranr,vs_value,hdef,[]);
writeprocdef.parast.insert(hparavs);
end;
until not try_to_consume(_SEMICOLON);
sc.free;
symtablestack.pop(readprocdef.parast);
consume(_RECKKLAMMER);
{ the parser need to know if a property has parameters, the
index parameter doesn't count (PFV) }
if paranr>0 then
include(p.propoptions,ppo_hasparameters);
end;
{ overridden property ? }
{ force property interface
there is a property parameter
a global property }
if (token=_COLON) or (paranr>0) or (astruct=nil) then
begin
consume(_COLON);
single_type(p.propdef,[]);
if is_dispinterface(astruct) and not is_automatable(p.propdef) then
Message1(type_e_not_automatable,p.propdef.typename);
if (idtoken=_INDEX) then
begin
consume(_INDEX);
pt:=comp_expr(true,false);
{ Only allow enum and integer indexes. Convert all integer
values to s32int to be compatible with delphi, because the
procedure matching requires equal parameters }
if is_constnode(pt) and
is_ordinal(pt.resultdef)
{$ifndef cpu64bitaddr}
and (not is_64bitint(pt.resultdef))
{$endif cpu64bitaddr}
then
begin
if is_integer(pt.resultdef) then
inserttypeconv_internal(pt,s32inttype);
p.index:=tordconstnode(pt).value.svalue;
end
else
begin
Message(parser_e_invalid_property_index_value);
p.index:=0;
end;
p.indexdef:=pt.resultdef;
include(p.propoptions,ppo_indexed);
{ concat a longint to the para templates }
add_index_parameter(paranr,p,readprocdef,writeprocdef);
pt.free;
end;
end
else
begin
{ do an property override }
if (astruct.typ=objectdef) then
overridden:=search_struct_member(tobjectdef(astruct).childof,p.name)
else
overridden:=nil;
if assigned(overridden) and
(overridden.typ=propertysym) and
not(is_dispinterface(astruct)) then
begin
p.overriddenpropsym:=tpropertysym(overridden);
{ inherit all type related entries }
p.indexdef:=tpropertysym(overridden).indexdef;
p.propdef:=tpropertysym(overridden).propdef;
p.index:=tpropertysym(overridden).index;
p.default:=tpropertysym(overridden).default;
p.propoptions:=tpropertysym(overridden).propoptions;
if ppo_indexed in p.propoptions then
add_index_parameter(paranr,p,readprocdef,writeprocdef);
end
else
begin
p.propdef:=generrordef;
message(parser_e_no_property_found_to_override);
end;
end;
if ((p.visibility=vis_published) or is_dispinterface(astruct)) and
(not(p.propdef.is_publishable) or (sp_static in p.symoptions)) then
begin
Message(parser_e_cant_publish_that_property);
p.visibility:=vis_public;
end;
if not(is_dispinterface(astruct)) then
begin
if try_to_consume(_READ) then
begin
p.propaccesslist[palt_read].clear;
if parse_symlist(p.propaccesslist[palt_read],def) then
begin
sym:=p.propaccesslist[palt_read].firstsym^.sym;
case sym.typ of
procsym :
begin
{ read is function returning the type of the property }
readprocdef.returndef:=p.propdef;
{ Insert hidden parameters }
handle_calling_convention(readprocdef);
{ search procdefs matching readprocdef }
{ we ignore hidden stuff here because the property access symbol might have
non default calling conventions which might change the hidden stuff;
see tw3216.pp (FK) }
p.propaccesslist[palt_read].procdef:=Tprocsym(sym).Find_procdef_bypara(readprocdef.paras,p.propdef,[cpo_allowdefaults,cpo_ignorehidden]);
if not assigned(p.propaccesslist[palt_read].procdef) or
{ because of cpo_ignorehidden we need to compare if it is a static class method and we have a class property }
((sp_static in p.symoptions) <> tprocdef(p.propaccesslist[palt_read].procdef).no_self_node) then
Message(parser_e_ill_property_access_sym);
end;
fieldvarsym :
begin
if not assigned(def) then
internalerror(200310071);
if compare_defs(def,p.propdef,nothingn)>=te_equal then
begin
{ property parameters are allowed if this is
an indexed property, because the index is then
the parameter.
Note: In the help of Kylix it is written
that it isn't allowed, but the compiler accepts it (PFV) }
if (ppo_hasparameters in p.propoptions) or
((sp_static in p.symoptions) <> (sp_static in sym.symoptions)) then
Message(parser_e_ill_property_access_sym);
end
else
IncompatibleTypes(def,p.propdef);
end;
else
Message(parser_e_ill_property_access_sym);
end;
end;
end;
if try_to_consume(_WRITE) then
begin
p.propaccesslist[palt_write].clear;
if parse_symlist(p.propaccesslist[palt_write],def) then
begin
sym:=p.propaccesslist[palt_write].firstsym^.sym;
case sym.typ of
procsym :
begin
{ write is a procedure with an extra value parameter
of the of the property }
writeprocdef.returndef:=voidtype;
inc(paranr);
hparavs:=tparavarsym.create('$value',10*paranr,vs_value,p.propdef,[]);
writeprocdef.parast.insert(hparavs);
{ Insert hidden parameters }
handle_calling_convention(writeprocdef);
{ search procdefs matching writeprocdef }
if cs_varpropsetter in current_settings.localswitches then
p.propaccesslist[palt_write].procdef:=Tprocsym(sym).Find_procdef_bypara(writeprocdef.paras,writeprocdef.returndef,[cpo_allowdefaults,cpo_ignorevarspez])
else
p.propaccesslist[palt_write].procdef:=Tprocsym(sym).Find_procdef_bypara(writeprocdef.paras,writeprocdef.returndef,[cpo_allowdefaults]);
if not assigned(p.propaccesslist[palt_write].procdef) then
Message(parser_e_ill_property_access_sym);
end;
fieldvarsym :
begin
if not assigned(def) then
internalerror(200310072);
if compare_defs(def,p.propdef,nothingn)>=te_equal then
begin
{ property parameters are allowed if this is
an indexed property, because the index is then
the parameter.
Note: In the help of Kylix it is written
that it isn't allowed, but the compiler accepts it (PFV) }
if (ppo_hasparameters in p.propoptions) or
((sp_static in p.symoptions) <> (sp_static in sym.symoptions)) then
Message(parser_e_ill_property_access_sym);
end
else
IncompatibleTypes(def,p.propdef);
end;
else
Message(parser_e_ill_property_access_sym);
end;
end;
end;
end
else
parse_dispinterface(p,readprocdef,writeprocdef,paranr);
{ stored is not allowed for dispinterfaces, records or class properties }
if assigned(astruct) and not(is_dispinterface(astruct) or is_record(astruct)) and not is_classproperty then
begin
{ ppo_stored is default on for not overridden properties }
if not assigned(p.overriddenpropsym) then
include(p.propoptions,ppo_stored);
if try_to_consume(_STORED) then
begin
include(p.propoptions,ppo_stored);
p.propaccesslist[palt_stored].clear;
case token of
_ID:
begin
{ in the case that idtoken=_DEFAULT }
{ we have to do nothing except }
{ setting ppo_stored, it's the same }
{ as stored true }
if idtoken<>_DEFAULT then
begin
{ parse_symlist cannot deal with constsyms, and
we also don't want to put constsyms in symlists
since they have to be evaluated immediately rather
than each time the property is accessed
The proper fix would be to always create a parse tree
and then convert that one, if appropriate, to a symlist.
Currently, we e.g. don't support any constant expressions
yet either here, while Delphi does.
}
{ make sure we don't let constants mask class fields/
methods
}
if (not assigned(astruct) or
(search_struct_member(astruct,pattern)=nil)) and
searchsym(pattern,sym,srsymtable) and
(sym.typ = constsym) then
begin
addsymref(sym);
if not is_boolean(tconstsym(sym).constdef) then
Message(parser_e_stored_property_must_be_boolean)
else if (tconstsym(sym).value.valueord=0) then
{ same as for _FALSE }
exclude(p.propoptions,ppo_stored)
else
{ same as for _TRUE }
p.default:=longint($80000000);
consume(_ID);
end
else if parse_symlist(p.propaccesslist[palt_stored],def) then
begin
sym:=p.propaccesslist[palt_stored].firstsym^.sym;
case sym.typ of
procsym :
begin
{ Create a temporary procvardef to handle parameters }
storedprocdef:=tprocvardef.create(normal_function_level);
include(storedprocdef.procoptions,po_methodpointer);
{ Return type must be boolean }
storedprocdef.returndef:=pasbool8type;
{ Add index parameter if needed }
if ppo_indexed in p.propoptions then
begin
hparavs:=tparavarsym.create('$index',10,vs_value,p.indexdef,[]);
storedprocdef.parast.insert(hparavs);
end;
{ Insert hidden parameters }
handle_calling_convention(storedprocdef);
p.propaccesslist[palt_stored].procdef:=Tprocsym(sym).Find_procdef_bypara(storedprocdef.paras,storedprocdef.returndef,[cpo_allowdefaults,cpo_ignorehidden]);
if not assigned(p.propaccesslist[palt_stored].procdef) then
message(parser_e_ill_property_storage_sym);
{ Not needed anymore }
storedprocdef.owner.deletedef(storedprocdef);
end;
fieldvarsym :
begin
if not assigned(def) then
internalerror(200310073);
if (ppo_hasparameters in p.propoptions) or
not(is_boolean(def)) then
Message(parser_e_stored_property_must_be_boolean);
end;
else
Message(parser_e_ill_property_access_sym);
end;
end;
end;
end;
_FALSE:
begin
consume(_FALSE);
exclude(p.propoptions,ppo_stored);
end;
_TRUE:
begin
p.default:=longint($80000000);
consume(_TRUE);
end;
end;
end;
end;
if not is_record(astruct) and try_to_consume(_DEFAULT) then
begin
if not allow_default_property(p) then
begin
Message(parser_e_property_cant_have_a_default_value);
{ Error recovery }
pt:=comp_expr(true,false);
pt.free;
end
else
begin
{ Get the result of the default, the firstpass is
needed to support values like -1 }
pt:=comp_expr(true,false);
if (p.propdef.typ=setdef) and
(pt.nodetype=arrayconstructorn) then
begin
arrayconstructor_to_set(pt);
do_typecheckpass(pt);
end;
inserttypeconv(pt,p.propdef);
if not(is_constnode(pt)) then
Message(parser_e_property_default_value_must_const);
{ Set default value }
case pt.nodetype of
setconstn :
p.default:=plongint(tsetconstnode(pt).value_set)^;
ordconstn :
if (Tordconstnode(pt).value<int64(low(longint))) or
(Tordconstnode(pt).value>int64(high(cardinal))) then
message(parser_e_range_check_error)
else
p.default:=longint(tordconstnode(pt).value.svalue);
niln :
p.default:=0;
realconstn:
p.default:=longint(single(trealconstnode(pt).value_real));
end;
pt.free;
end;
end
else if not is_record(astruct) and try_to_consume(_NODEFAULT) then
begin
p.default:=longint($80000000);
end;
(*
else {if allow_default_property(p) then
begin
p.default:=longint($80000000);
end;
*)
{ Parse possible "implements" keyword }
if not is_record(astruct) and try_to_consume(_IMPLEMENTS) then
begin
single_type(def,[]);
if not(is_interface(def)) then
message(parser_e_class_implements_must_be_interface);
if is_interface(p.propdef) then
begin
if compare_defs(def,p.propdef,nothingn)<te_equal then
begin
message2(parser_e_implements_must_have_correct_type,def.typename,p.propdef.typename);
exit;
end;
end
else if is_class(p.propdef) then
begin
ImplIntf:=tobjectdef(p.propdef).find_implemented_interface(tobjectdef(def));
if assigned(ImplIntf) then
begin
if compare_defs(ImplIntf.IntfDef,def,nothingn)<te_equal then
begin
message2(parser_e_implements_must_have_correct_type,ImplIntf.IntfDef.typename,def.typename);
exit;
end;
end
else
begin
message2(parser_e_class_doesnt_implement_interface,p.propdef.typename,def.typename);
exit;
end;
end
else
begin
message(parser_e_implements_must_be_class_or_interface);
exit;
end;
if not assigned(p.propaccesslist[palt_read].firstsym) then
begin
message(parser_e_implements_must_read_specifier);
exit;
end;
if assigned(p.propaccesslist[palt_read].procdef) and
(tprocdef(p.propaccesslist[palt_read].procdef).proccalloption<>pocall_default) then
message(parser_e_implements_getter_not_default_cc);
if assigned(p.propaccesslist[palt_write].firstsym) then
begin
message(parser_e_implements_must_not_have_write_specifier);
exit;
end;
if assigned(p.propaccesslist[palt_stored].firstsym) then
begin
message(parser_e_implements_must_not_have_stored_specifier);
exit;
end;
found:=false;
for i:=0 to tobjectdef(astruct).ImplementedInterfaces.Count-1 do
begin
ImplIntf:=TImplementedInterface(tobjectdef(astruct).ImplementedInterfaces[i]);
if compare_defs(def,ImplIntf.IntfDef,nothingn)>=te_equal then
begin
found:=true;
break;
end;
end;
if found then
begin
{ An interface may not be delegated by more than one property,
it also may not have method mappings. }
if Assigned(ImplIntf.ImplementsGetter) then
message1(parser_e_duplicate_implements_clause,ImplIntf.IntfDef.typename);
if Assigned(ImplIntf.NameMappings) then
message2(parser_e_mapping_no_implements,ImplIntf.IntfDef.typename,astruct.objrealname^);
ImplIntf.ImplementsGetter:=p;
ImplIntf.VtblImplIntf:=ImplIntf;
case p.propaccesslist[palt_read].firstsym^.sym.typ of
procsym :
begin
if (po_virtualmethod in tprocdef(p.propaccesslist[palt_read].procdef).procoptions) and
not is_objectpascal_helper(tprocdef(p.propaccesslist[palt_read].procdef).struct) then
ImplIntf.IType:=etVirtualMethodResult
else
ImplIntf.IType:=etStaticMethodResult;
end;
fieldvarsym :
begin
ImplIntf.IType:=etFieldValue;
{ this must be done more sophisticated, here is also probably the wrong place }
ImplIntf.IOffset:=tfieldvarsym(p.propaccesslist[palt_read].firstsym^.sym).fieldoffset;
end
else
internalerror(200802161);
end;
if not is_interface(p.propdef) then
case ImplIntf.IType of
etVirtualMethodResult: ImplIntf.IType := etVirtualMethodClass;
etStaticMethodResult: ImplIntf.IType := etStaticMethodClass;
etFieldValue: ImplIntf.IType := etFieldValueClass;
else
internalerror(200912101);
end;
end
else
message1(parser_e_implements_uses_non_implemented_interface,def.typename);
end;
{ remove unneeded procdefs }
if readprocdef.proctypeoption<>potype_propgetter then
readprocdef.owner.deletedef(readprocdef);
if writeprocdef.proctypeoption<>potype_propsetter then
writeprocdef.owner.deletedef(writeprocdef);
result:=p;
end;
function maybe_parse_proc_directives(def:tdef):boolean;
var
newtype : ttypesym;
begin
result:=false;
{ Process procvar directives before = and ; }
if (def.typ=procvardef) and
(def.typesym=nil) and
check_proc_directive(true) then
begin
newtype:=ttypesym.create('unnamed',def);
parse_var_proc_directives(tsym(newtype));
newtype.typedef:=nil;
def.typesym:=nil;
newtype.free;
result:=true;
end;
end;
const
variantrecordlevel : longint = 0;
procedure read_public_and_external_sc(sc:TFPObjectList);
var
vs: tabstractvarsym;
begin
{ only allowed for one var }
vs:=tabstractvarsym(sc[0]);
if sc.count>1 then
Message(parser_e_absolute_only_one_var);
read_public_and_external(vs);
end;
procedure read_public_and_external(vs: tabstractvarsym);
var
is_dll,
is_cdecl,
is_external_var,
is_weak_external,
is_public_var : boolean;
dll_name,section_name,
C_name,mangledname : string;
begin
{ only allowed for one var }
{ only allow external and public on global symbols }
if vs.typ<>staticvarsym then
begin
Message(parser_e_no_local_var_external);
exit;
end;
{ defaults }
is_dll:=false;
is_cdecl:=false;
is_external_var:=false;
is_public_var:=false;
section_name := '';
C_name:=vs.realname;
{ macpas specific handling due to some switches}
if (m_mac in current_settings.modeswitches) then
begin
if (cs_external_var in current_settings.localswitches) then
begin {The effect of this is the same as if cvar; external; has been given as directives.}
is_cdecl:=true;
is_external_var:=true;
end
else if (cs_externally_visible in current_settings.localswitches) then
begin {The effect of this is the same as if cvar has been given as directives and it's made public.}
is_cdecl:=true;
is_public_var:=true;
end;
end;
{ cdecl }
if try_to_consume(_CVAR) then
begin
consume(_SEMICOLON);
is_cdecl:=true;
end;
{ external }
is_weak_external:=try_to_consume(_WEAKEXTERNAL);
if is_weak_external or
try_to_consume(_EXTERNAL) then
begin
is_external_var:=true;
if (idtoken<>_NAME) and (token<>_SEMICOLON) then
begin
is_dll:=true;
dll_name:=get_stringconst;
if ExtractFileExt(dll_name)='' then
dll_name:=ChangeFileExt(dll_name,target_info.sharedlibext);
end;
if not(is_cdecl) and try_to_consume(_NAME) then
C_name:=get_stringconst;
consume(_SEMICOLON);
end;
{ export or public }
if idtoken in [_EXPORT,_PUBLIC] then
begin
consume(_ID);
if is_external_var then
Message(parser_e_not_external_and_export)
else
is_public_var:=true;
if try_to_consume(_NAME) then
C_name:=get_stringconst;
if (target_info.system in systems_allow_section_no_semicolon) and
(vs.typ=staticvarsym) and
try_to_consume (_SECTION) then
section_name:=get_stringconst;
consume(_SEMICOLON);
end;
{ Windows uses an indirect reference using import tables }
if is_dll and
(target_info.system in systems_all_windows) then
include(vs.varoptions,vo_is_dll_var);
{ This can only happen if vs.typ=staticvarsym }
if section_name<>'' then
begin
tstaticvarsym(vs).section:=section_name;
include(vs.varoptions,vo_has_section);
end;
{ Add C _ prefix }
if is_cdecl or
(
is_dll and
(target_info.system in systems_darwin)
) then
C_Name := target_info.Cprefix+C_Name;
if is_public_var then
begin
include(vs.varoptions,vo_is_public);
vs.varregable := vr_none;
{ mark as referenced }
inc(vs.refs);
end;
mangledname:=C_name;
{ now we can insert it in the import lib if its a dll, or
add it to the externals }
if is_external_var then
begin
if vo_is_typed_const in vs.varoptions then
Message(parser_e_initialized_not_for_external);
include(vs.varoptions,vo_is_external);
if (is_weak_external) then
begin
if not(target_info.system in systems_weak_linking) then
message(parser_e_weak_external_not_supported);
include(vs.varoptions,vo_is_weak_external);
end;
vs.varregable := vr_none;
if is_dll then
begin
if target_info.system in (systems_all_windows + systems_nativent +
[system_i386_emx, system_i386_os2]) then
mangledname:=make_dllmangledname(dll_name,C_name,0,pocall_none);
current_module.AddExternalImport(dll_name,C_Name,mangledname,0,true,false);
end
else
if tf_has_dllscanner in target_info.flags then
current_module.dllscannerinputlist.Add(vs.mangledname,vs);
end;
{ Set the assembler name }
tstaticvarsym(vs).set_mangledname(mangledname);
end;
procedure try_consume_sectiondirective(var asection: ansistring);
begin
if idtoken=_SECTION then
begin
consume(_ID);
asection:=get_stringconst;
consume(_SEMICOLON);
end;
end;
procedure read_var_decls(options:Tvar_dec_options);
procedure read_default_value(sc : TFPObjectList);
var
vs : tabstractnormalvarsym;
tcsym : tstaticvarsym;
begin
vs:=tabstractnormalvarsym(sc[0]);
if sc.count>1 then
Message(parser_e_initialized_only_one_var);
if vo_is_thread_var in vs.varoptions then
Message(parser_e_initialized_not_for_threadvar);
consume(_EQ);
case vs.typ of
localvarsym :
begin
tcsym:=tstaticvarsym.create('$default'+vs.realname,vs_const,vs.vardef,[]);
include(tcsym.symoptions,sp_internal);
vs.defaultconstsym:=tcsym;
symtablestack.top.insert(tcsym);
read_typed_const(current_asmdata.asmlists[al_typedconsts],tcsym,false);
end;
staticvarsym :
begin
read_typed_const(current_asmdata.asmlists[al_typedconsts],tstaticvarsym(vs),false);
end;
else
internalerror(200611051);
end;
vs.varstate:=vs_initialised;
end;
{$ifdef gpc_mode}
procedure read_gpc_name(sc : TFPObjectList);
var
vs : tabstractnormalvarsym;
C_Name : string;
begin
consume(_ID);
C_Name:=get_stringconst;
vs:=tabstractnormalvarsym(sc[0]);
if sc.count>1 then
Message(parser_e_absolute_only_one_var);
if vs.typ=staticvarsym then
begin
tstaticvarsym(vs).set_mangledname(C_Name);
include(vs.varoptions,vo_is_external);
end
else
Message(parser_e_no_local_var_external);
end;
{$endif}
procedure read_absolute(sc : TFPObjectList);
var
vs : tabstractvarsym;
abssym : tabsolutevarsym;
pt,hp : tnode;
st : tsymtable;
{$ifdef i386}
tmpaddr : int64;
{$endif}
begin
abssym:=nil;
{ only allowed for one var }
vs:=tabstractvarsym(sc[0]);
if sc.count>1 then
Message(parser_e_absolute_only_one_var);
if vo_is_typed_const in vs.varoptions then
Message(parser_e_initialized_not_for_external);
{ parse the rest }
pt:=expr(true);
{ check allowed absolute types }
if (pt.nodetype=stringconstn) or
(is_constcharnode(pt)) then
begin
abssym:=tabsolutevarsym.create(vs.realname,vs.vardef);
abssym.fileinfo:=vs.fileinfo;
if pt.nodetype=stringconstn then
abssym.asmname:=stringdup(strpas(tstringconstnode(pt).value_str))
else
abssym.asmname:=stringdup(chr(tordconstnode(pt).value.svalue));
consume(token);
abssym.abstyp:=toasm;
end
{ address }
else if is_constintnode(pt) then
begin
abssym:=tabsolutevarsym.create(vs.realname,vs.vardef);
abssym.fileinfo:=vs.fileinfo;
abssym.abstyp:=toaddr;
{$ifndef cpu64bitaddr}
{ on 64 bit systems, abssym.addroffset is a qword and hence this
test is useless (value is a 64 bit entity) and will always fail
for positive values (since int64(high(abssym.addroffset))=-1
}
if (Tordconstnode(pt).value<int64(low(abssym.addroffset))) or
(Tordconstnode(pt).value>int64(high(abssym.addroffset))) then
message(parser_e_range_check_error)
else
{$endif}
abssym.addroffset:=Tordconstnode(pt).value.svalue;
{$ifdef i386}
abssym.absseg:=false;
if (target_info.system in [system_i386_go32v2,system_i386_watcom]) and
try_to_consume(_COLON) then
begin
pt.free;
pt:=expr(true);
if is_constintnode(pt) then
begin
tmpaddr:=abssym.addroffset shl 4+tordconstnode(pt).value.svalue;
if (tmpaddr<int64(low(abssym.addroffset))) or
(tmpaddr>int64(high(abssym.addroffset))) then
message(parser_e_range_check_error)
else
abssym.addroffset:=tmpaddr;
abssym.absseg:=true;
end
else
Message(type_e_ordinal_expr_expected);
end;
{$endif i386}
end
{ variable }
else
begin
{ we have to be able to take the address of the absolute
expression
}
valid_for_addr(pt,true);
{ remove subscriptn before checking for loadn }
hp:=pt;
while (hp.nodetype in [subscriptn,typeconvn,vecn]) do
begin
{ check for implicit dereferencing and reject it }
if (hp.nodetype in [subscriptn,vecn]) then
begin
if (tunarynode(hp).left.resultdef.typ in [pointerdef,classrefdef]) then
break;
{ catch, e.g., 'var b: char absolute pchar_var[5];"
(pchar_var[5] is a pchar_2_string typeconv ->
the vecn only sees an array of char)
I don't know if all of these type conversions are
possible, but they're definitely all bad.
}
if (tunarynode(hp).left.nodetype=typeconvn) and
(ttypeconvnode(tunarynode(hp).left).convtype in
[tc_pchar_2_string,tc_pointer_2_array,
tc_intf_2_string,tc_intf_2_guid,
tc_dynarray_2_variant,tc_interface_2_variant,
tc_array_2_dynarray]) then
break;
if (tunarynode(hp).left.resultdef.typ=stringdef) and
not(tstringdef(tunarynode(hp).left.resultdef).stringtype in [st_shortstring,st_longstring]) then
break;
if (tunarynode(hp).left.resultdef.typ=objectdef) and
(tobjectdef(tunarynode(hp).left.resultdef).objecttype<>odt_object) then
break;
if is_dynamic_array(tunarynode(hp).left.resultdef) then
break;
end;
hp:=tunarynode(hp).left;
end;
if (hp.nodetype=loadn) then
begin
{ we should check the result type of loadn }
if not (tloadnode(hp).symtableentry.typ in [fieldvarsym,staticvarsym,localvarsym,paravarsym]) then
Message(parser_e_absolute_only_to_var_or_const);
abssym:=tabsolutevarsym.create(vs.realname,vs.vardef);
abssym.fileinfo:=vs.fileinfo;
abssym.abstyp:=tovar;
abssym.ref:=node_to_propaccesslist(pt);
{ if the sizes are different, can't be a regvar since you }
{ can't be "absolute upper 8 bits of a register" (except }
{ if its a record field of the same size of a record }
{ regvar, but in that case pt.resultdef.size will have }
{ the same size since it refers to the field and not to }
{ the whole record -- which is why we use pt and not hp) }
{ we can't take the size of an open array }
if is_open_array(pt.resultdef) or
(vs.vardef.size <> pt.resultdef.size) then
make_not_regable(pt,[ra_addr_regable]);
end
else
Message(parser_e_absolute_only_to_var_or_const);
end;
pt.free;
{ replace old varsym with the new absolutevarsym }
if assigned(abssym) then
begin
st:=vs.owner;
vs.owner.Delete(vs);
st.insert(abssym);
sc[0]:=abssym;
end;
end;
var
sc : TFPObjectList;
vs : tabstractvarsym;
hdef : tdef;
i : longint;
semicoloneaten,
allowdefaultvalue,
hasdefaultvalue : boolean;
hintsymoptions : tsymoptions;
deprecatedmsg : pshortstring;
old_block_type : tblock_type;
sectionname : ansistring;
begin
old_block_type:=block_type;
block_type:=bt_var;
{ Force an expected ID error message }
if not (token in [_ID,_CASE,_END]) then
consume(_ID);
{ read vars }
sc:=TFPObjectList.create(false);
while (token=_ID) do
begin
semicoloneaten:=false;
hasdefaultvalue:=false;
allowdefaultvalue:=true;
sc.clear;
repeat
if (token = _ID) then
begin
case symtablestack.top.symtabletype of
localsymtable :
vs:=tlocalvarsym.create(orgpattern,vs_value,generrordef,[]);
staticsymtable,
globalsymtable :
begin
vs:=tstaticvarsym.create(orgpattern,vs_value,generrordef,[]);
if vd_threadvar in options then
include(vs.varoptions,vo_is_thread_var);
end;
else
internalerror(200411064);
end;
sc.add(vs);
symtablestack.top.insert(vs);
end;
consume(_ID);
until not try_to_consume(_COMMA);
{ read variable type def }
block_type:=bt_var_type;
consume(_COLON);
{$ifdef gpc_mode}
if (m_gpc in current_settings.modeswitches) and
(token=_ID) and
(orgpattern='__asmname__') then
read_gpc_name(sc);
{$endif}
read_anon_type(hdef,false);
for i:=0 to sc.count-1 do
begin
vs:=tabstractvarsym(sc[i]);
vs.vardef:=hdef;
end;
block_type:=bt_var;
{ Process procvar directives }
if maybe_parse_proc_directives(hdef) then
semicoloneaten:=true;
{ check for absolute }
if try_to_consume(_ABSOLUTE) then
begin
read_absolute(sc);
allowdefaultvalue:=false;
end;
{ Check for EXTERNAL etc directives before a semicolon }
if (idtoken in [_EXPORT,_EXTERNAL,_WEAKEXTERNAL,_PUBLIC,_CVAR]) then
begin
read_public_and_external_sc(sc);
allowdefaultvalue:=false;
semicoloneaten:=true;
end;
{ try to parse the hint directives }
hintsymoptions:=[];
deprecatedmsg:=nil;
try_consume_hintdirective(hintsymoptions,deprecatedmsg);
for i:=0 to sc.count-1 do
begin
vs:=tabstractvarsym(sc[i]);
vs.symoptions := vs.symoptions + hintsymoptions;
if deprecatedmsg<>nil then
vs.deprecatedmsg:=stringdup(deprecatedmsg^);
end;
stringdispose(deprecatedmsg);
{ Handling of Delphi typed const = initialized vars }
if allowdefaultvalue and
(token=_EQ) and
not(m_tp7 in current_settings.modeswitches) and
(symtablestack.top.symtabletype<>parasymtable) then
begin
{ Add calling convention for procvar }
if (hdef.typ=procvardef) and
(hdef.typesym=nil) then
handle_calling_convention(tprocvardef(hdef));
read_default_value(sc);
hasdefaultvalue:=true;
end
else
begin
if not(semicoloneaten) then
consume(_SEMICOLON);
end;
{ Support calling convention for procvars after semicolon }
if not(hasdefaultvalue) and
(hdef.typ=procvardef) and
(hdef.typesym=nil) then
begin
{ Parse procvar directives after ; }
maybe_parse_proc_directives(hdef);
{ Add calling convention for procvar }
handle_calling_convention(tprocvardef(hdef));
{ Handling of Delphi typed const = initialized vars }
if (token=_EQ) and
not(m_tp7 in current_settings.modeswitches) and
(symtablestack.top.symtabletype<>parasymtable) then
begin
read_default_value(sc);
hasdefaultvalue:=true;
end;
end;
{ Check for EXTERNAL etc directives or, in macpas, if cs_external_var is set}
if (
(
(idtoken in [_EXPORT,_EXTERNAL,_WEAKEXTERNAL,_PUBLIC,_CVAR]) and
(m_cvar_support in current_settings.modeswitches)
) or
(
(m_mac in current_settings.modeswitches) and
(
(cs_external_var in current_settings.localswitches) or
(cs_externally_visible in current_settings.localswitches)
)
)
) then
read_public_and_external_sc(sc);
{ try to parse a section directive }
if (target_info.system in systems_allow_section) and
(symtablestack.top.symtabletype in [staticsymtable,globalsymtable]) and
(idtoken=_SECTION) then
begin
try_consume_sectiondirective(sectionname);
if sectionname<>'' then
begin
for i:=0 to sc.count-1 do
begin
vs:=tabstractvarsym(sc[i]);
if (vs.varoptions *[vo_is_external,vo_is_weak_external])<>[] then
Message(parser_e_externals_no_section);
if vs.typ<>staticvarsym then
Message(parser_e_section_no_locals);
tstaticvarsym(vs).section:=sectionname;
include(vs.varoptions, vo_has_section);
end;
end;
end;
{ allocate normal variable (non-external and non-typed-const) staticvarsyms }
for i:=0 to sc.count-1 do
begin
vs:=tabstractvarsym(sc[i]);
if (vs.typ=staticvarsym) and
not(vo_is_typed_const in vs.varoptions) and
not(vo_is_external in vs.varoptions) then
insertbssdata(tstaticvarsym(vs));
end;
end;
block_type:=old_block_type;
{ free the list }
sc.free;
end;
procedure read_record_fields(options:Tvar_dec_options);
var
sc : TFPObjectList;
i : longint;
hs,sorg,static_name : string;
hdef,casetype : tdef;
{ maxsize contains the max. size of a variant }
{ startvarrec contains the start of the variant part of a record }
maxsize, startvarrecsize : longint;
usedalign,
maxalignment,startvarrecalign,
maxpadalign, startpadalign: shortint;
pt : tnode;
fieldvs : tfieldvarsym;
hstaticvs : tstaticvarsym;
vs : tabstractvarsym;
srsym : tsym;
srsymtable : TSymtable;
visibility : tvisibility;
recst : tabstractrecordsymtable;
unionsymtable : trecordsymtable;
offset : longint;
uniondef : trecorddef;
hintsymoptions : tsymoptions;
deprecatedmsg : pshortstring;
semicoloneaten,
removeclassoption: boolean;
{$if defined(powerpc) or defined(powerpc64)}
tempdef: tdef;
is_first_type: boolean;
{$endif powerpc or powerpc64}
sl: tpropaccesslist;
old_block_type: tblock_type;
begin
old_block_type:=block_type;
block_type:=bt_var;
recst:=tabstractrecordsymtable(symtablestack.top);
{$if defined(powerpc) or defined(powerpc64)}
is_first_type:=true;
{$endif powerpc or powerpc64}
{ Force an expected ID error message }
if not (token in [_ID,_CASE,_END]) then
consume(_ID);
{ read vars }
sc:=TFPObjectList.create(false);
removeclassoption:=false;
while (token=_ID) and
not(((vd_object in options) or
((vd_record in options) and (m_advanced_records in current_settings.modeswitches))) and
(idtoken in [_PUBLIC,_PRIVATE,_PUBLISHED,_PROTECTED,_STRICT])) do
begin
visibility:=symtablestack.top.currentvisibility;
semicoloneaten:=false;
sc.clear;
repeat
sorg:=orgpattern;
if token=_ID then
begin
vs:=tfieldvarsym.create(sorg,vs_value,generrordef,[]);
sc.add(vs);
recst.insert(vs);
end;
consume(_ID);
until not try_to_consume(_COMMA);
if m_delphi in current_settings.modeswitches then
block_type:=bt_var_type
else
block_type:=old_block_type;
consume(_COLON);
read_anon_type(hdef,false);
block_type:=bt_var;
{ allow only static fields reference to struct where they are declared }
if not (vd_class in options) and
(is_object(hdef) or is_record(hdef)) and
is_owned_by(tabstractrecorddef(recst.defowner),tabstractrecorddef(hdef)) then
begin
Message1(type_e_type_is_not_completly_defined, tabstractrecorddef(hdef).RttiName);
{ for error recovery or compiler will crash later }
hdef:=generrordef;
end;
{ Process procvar directives }
if maybe_parse_proc_directives(hdef) then
semicoloneaten:=true;
{$if defined(powerpc) or defined(powerpc64)}
{ from gcc/gcc/config/rs6000/rs6000.h:
/* APPLE LOCAL begin Macintosh alignment 2002-1-22 ff */
/* Return the alignment of a struct based on the Macintosh PowerPC
alignment rules. In general the alignment of a struct is
determined by the greatest alignment of its elements. However, the
PowerPC rules cause the alignment of a struct to peg at word
alignment except when the first field has greater than word
(32-bit) alignment, in which case the alignment is determined by
the alignment of the first field. */
}
if (target_info.system in [system_powerpc_darwin, system_powerpc_macos, system_powerpc64_darwin]) and
is_first_type and
(symtablestack.top.symtabletype=recordsymtable) and
(trecordsymtable(symtablestack.top).usefieldalignment=C_alignment) then
begin
tempdef:=hdef;
while tempdef.typ=arraydef do
tempdef:=tarraydef(tempdef).elementdef;
if tempdef.typ<>recorddef then
maxpadalign:=tempdef.alignment
else
maxpadalign:=trecorddef(tempdef).padalignment;
if (maxpadalign>4) and
(maxpadalign>trecordsymtable(symtablestack.top).padalignment) then
trecordsymtable(symtablestack.top).padalignment:=maxpadalign;
is_first_type:=false;
end;
{$endif powerpc or powerpc64}
{ types that use init/final are not allowed in variant parts, but
classes are allowed }
if (variantrecordlevel>0) then
if is_managed_type(hdef) then
Message(parser_e_cant_use_inittable_here)
else
if hdef.typ=undefineddef then
Message(parser_e_cant_use_type_parameters_here);
{ try to parse the hint directives }
hintsymoptions:=[];
deprecatedmsg:=nil;
try_consume_hintdirective(hintsymoptions,deprecatedmsg);
{ update variable type and hints }
for i:=0 to sc.count-1 do
begin
fieldvs:=tfieldvarsym(sc[i]);
fieldvs.vardef:=hdef;
{ insert any additional hint directives }
fieldvs.symoptions := fieldvs.symoptions + hintsymoptions;
if deprecatedmsg<>nil then
fieldvs.deprecatedmsg:=stringdup(deprecatedmsg^);
end;
stringdispose(deprecatedmsg);
{ Records and objects can't have default values }
{ for a record there doesn't need to be a ; before the END or ) }
if not(token in [_END,_RKLAMMER]) and
not(semicoloneaten) then
consume(_SEMICOLON);
{ Parse procvar directives after ; }
maybe_parse_proc_directives(hdef);
{ Add calling convention for procvar }
if (hdef.typ=procvardef) and
(hdef.typesym=nil) then
handle_calling_convention(tprocvardef(hdef));
{ check if it is a class field }
if (vd_object in options) then
begin
{ if it is not a class var section and token=STATIC then it is a class field too }
if not (vd_class in options) and try_to_consume(_STATIC) then
begin
consume(_SEMICOLON);
include(options,vd_class);
removeclassoption:=true;
end;
end;
if vd_class in options then
begin
{ add static flag and staticvarsyms }
for i:=0 to sc.count-1 do
begin
fieldvs:=tfieldvarsym(sc[i]);
include(fieldvs.symoptions,sp_static);
{ generate the symbol which reserves the space }
static_name:=lower(generate_nested_name(recst,'_'))+'_'+fieldvs.name;
hstaticvs:=tstaticvarsym.create('$_static_'+static_name,vs_value,hdef,[]);
include(hstaticvs.symoptions,sp_internal);
recst.get_unit_symtable.insert(hstaticvs);
insertbssdata(hstaticvs);
{ generate the symbol for the access }
sl:=tpropaccesslist.create;
sl.addsym(sl_load,hstaticvs);
recst.insert(tabsolutevarsym.create_ref('$'+static_name,hdef,sl));
end;
if removeclassoption then
begin
exclude(options,vd_class);
removeclassoption:=false;
end;
end;
if (visibility=vis_published) and
not(is_class(hdef)) then
begin
MessagePos(tfieldvarsym(sc[0]).fileinfo,parser_e_cant_publish_that);
visibility:=vis_public;
end;
if (visibility=vis_published) and
not(oo_can_have_published in tobjectdef(hdef).objectoptions) and
not(m_delphi in current_settings.modeswitches) then
begin
MessagePos(tfieldvarsym(sc[0]).fileinfo,parser_e_only_publishable_classes_can_be_published);
visibility:=vis_public;
end;
{ Generate field in the recordsymtable }
for i:=0 to sc.count-1 do
begin
fieldvs:=tfieldvarsym(sc[i]);
{ static data fields are already inserted in the globalsymtable }
if not(sp_static in fieldvs.symoptions) then
recst.addfield(fieldvs,visibility);
end;
end;
if m_delphi in current_settings.modeswitches then
block_type:=bt_var_type
else
block_type:=old_block_type;
{ Check for Case }
if (vd_record in options) and
try_to_consume(_CASE) then
begin
maxsize:=0;
maxalignment:=0;
maxpadalign:=0;
{ including a field declaration? }
fieldvs:=nil;
sorg:=orgpattern;
hs:=pattern;
searchsym(hs,srsym,srsymtable);
if not(assigned(srsym) and (srsym.typ in [typesym,unitsym])) then
begin
consume(_ID);
consume(_COLON);
fieldvs:=tfieldvarsym.create(sorg,vs_value,generrordef,[]);
symtablestack.top.insert(fieldvs);
end;
read_anon_type(casetype,true);
block_type:=bt_var;
if assigned(fieldvs) then
begin
fieldvs.vardef:=casetype;
recst.addfield(fieldvs,recst.currentvisibility);
end;
if not(is_ordinal(casetype))
{$ifndef cpu64bitaddr}
or is_64bitint(casetype)
{$endif cpu64bitaddr}
then
Message(type_e_ordinal_expr_expected);
consume(_OF);
UnionSymtable:=trecordsymtable.create('',current_settings.packrecords);
UnionDef:=trecorddef.create('',unionsymtable);
uniondef.isunion:=true;
startvarrecsize:=UnionSymtable.datasize;
{ align the bitpacking to the next byte }
UnionSymtable.datasize:=startvarrecsize;
startvarrecalign:=UnionSymtable.fieldalignment;
startpadalign:=Unionsymtable.padalignment;
symtablestack.push(UnionSymtable);
repeat
repeat
pt:=comp_expr(true,false);
if not(pt.nodetype=ordconstn) then
Message(parser_e_illegal_expression);
if try_to_consume(_POINTPOINT) then
pt:=crangenode.create(pt,comp_expr(true,false));
pt.free;
if token=_COMMA then
consume(_COMMA)
else
break;
until false;
if m_delphi in current_settings.modeswitches then
block_type:=bt_var_type
else
block_type:=old_block_type;
consume(_COLON);
{ read the vars }
consume(_LKLAMMER);
inc(variantrecordlevel);
if token<>_RKLAMMER then
read_record_fields([vd_record]);
dec(variantrecordlevel);
consume(_RKLAMMER);
{ calculates maximal variant size }
maxsize:=max(maxsize,unionsymtable.datasize);
maxalignment:=max(maxalignment,unionsymtable.fieldalignment);
maxpadalign:=max(maxpadalign,unionsymtable.padalignment);
{ the items of the next variant are overlayed }
unionsymtable.datasize:=startvarrecsize;
unionsymtable.fieldalignment:=startvarrecalign;
unionsymtable.padalignment:=startpadalign;
if (token<>_END) and (token<>_RKLAMMER) then
consume(_SEMICOLON)
else
break;
until (token=_END) or (token=_RKLAMMER);
symtablestack.pop(UnionSymtable);
{ at last set the record size to that of the biggest variant }
unionsymtable.datasize:=maxsize;
unionsymtable.fieldalignment:=maxalignment;
unionsymtable.addalignmentpadding;
{$if defined(powerpc) or defined(powerpc64)}
{ parent inherits the alignment padding if the variant is the first "field" of the parent record/variant }
if (target_info.system in [system_powerpc_darwin, system_powerpc_macos, system_powerpc64_darwin]) and
is_first_type and
(recst.usefieldalignment=C_alignment) and
(maxpadalign>recst.padalignment) then
recst.padalignment:=maxpadalign;
{$endif powerpc or powerpc64}
{ Align the offset where the union symtable is added }
case recst.usefieldalignment of
{ allow the unionsymtable to be aligned however it wants }
{ (within the global min/max limits) }
0, { default }
C_alignment:
usedalign:=used_align(unionsymtable.recordalignment,current_settings.alignment.recordalignmin,current_settings.alignment.maxCrecordalign);
{ 1 byte alignment if we are bitpacked }
bit_alignment:
usedalign:=1;
mac68k_alignment:
usedalign:=2;
{ otherwise alignment at the packrecords alignment of the }
{ current record }
else
usedalign:=used_align(recst.fieldalignment,current_settings.alignment.recordalignmin,current_settings.alignment.recordalignmax);
end;
offset:=align(recst.datasize,usedalign);
recst.datasize:=offset+unionsymtable.datasize;
if unionsymtable.recordalignment>recst.fieldalignment then
recst.fieldalignment:=unionsymtable.recordalignment;
trecordsymtable(recst).insertunionst(Unionsymtable,offset);
uniondef.owner.deletedef(uniondef);
end;
{ free the list }
sc.free;
{$ifdef powerpc}
is_first_type := false;
{$endif powerpc}
block_type:=old_block_type;
end;
end.
|