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Commit eff3cf7c by shannonwoods@chromium.org
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Clamped negative index access.

Fixed error that allowed negative index for accessing vector, matrix, and array. Now we report compile error and clamp the index to 0. Re-arranged code around it to handle negative index at the one location. BUG=crbug.com/239411 TEST=bug test case R=aedla@chromium.org, kbr@chromium.org Review URL: https://codereview.appspot.com/9193045 git-svn-id: https://angleproject.googlecode.com/svn/branches/dx11proto@2238 736b8ea6-26fd-11df-bfd4-992fa37f6226
parent b40ad5a4
Showing with 90 additions and 74 deletions
src/compiler/glslang.y
...@@ -267,43 +267,54 @@ postfix_expression ...@@ -267,43 +267,54 @@ postfix_expression
context->error(@2, " left of '[' is not of type array, matrix, or vector ", "expression"); context->error(@2, " left of '[' is not of type array, matrix, or vector ", "expression");
context->recover(); context->recover();
} }
if ($1->getType().getQualifier() == EvqConst && $3->getQualifier() == EvqConst) { if ($3->getQualifier() == EvqConst) {
int index = $3->getAsConstantUnion()->getIConst(0);
if (index < 0) {
std::stringstream infoStream;
infoStream << index;
std::string info = infoStream.str();
context->error(@3, "negative index", info.c_str());
context->recover();
index = 0;
}
if ($1->getType().getQualifier() == EvqConst) {
if ($1->isArray()) { // constant folding for arrays if ($1->isArray()) { // constant folding for arrays
$$ = context->addConstArrayNode($3->getAsConstantUnion()->getIConst(0), $1, @2); $$ = context->addConstArrayNode(index, $1, @2);
} else if ($1->isVector()) { // constant folding for vectors } else if ($1->isVector()) { // constant folding for vectors
TVectorFields fields; TVectorFields fields;
fields.num = 1; fields.num = 1;
fields.offsets[0] = $3->getAsConstantUnion()->getIConst(0); // need to do it this way because v.xy sends fields integer array fields.offsets[0] = index; // need to do it this way because v.xy sends fields integer array
$$ = context->addConstVectorNode(fields, $1, @2); $$ = context->addConstVectorNode(fields, $1, @2);
} else if ($1->isMatrix()) { // constant folding for matrices } else if ($1->isMatrix()) { // constant folding for matrices
$$ = context->addConstMatrixNode($3->getAsConstantUnion()->getIConst(0), $1, @2); $$ = context->addConstMatrixNode(index, $1, @2);
} }
} else { } else {
if ($3->getQualifier() == EvqConst) {
if (($1->isVector() || $1->isMatrix()) && $1->getType().getNominalSize() <= $3->getAsConstantUnion()->getIConst(0) && !$1->isArray() ) {
std::stringstream extraInfoStream;
extraInfoStream << "field selection out of range '" << $3->getAsConstantUnion()->getIConst(0) << "'";
std::string extraInfo = extraInfoStream.str();
context->error(@2, "", "[", extraInfo.c_str());
context->recover();
} else {
if ($1->isArray()) { if ($1->isArray()) {
if ($1->getType().getArraySize() == 0) { if ($1->getType().getArraySize() == 0) {
if ($1->getType().getMaxArraySize() <= $3->getAsConstantUnion()->getIConst(0)) { if ($1->getType().getMaxArraySize() <= index) {
if (context->arraySetMaxSize($1->getAsSymbolNode(), $1->getTypePointer(), $3->getAsConstantUnion()->getIConst(0), true, @2)) if (context->arraySetMaxSize($1->getAsSymbolNode(), $1->getTypePointer(), index, true, @2))
context->recover(); context->recover();
} else { } else {
if (context->arraySetMaxSize($1->getAsSymbolNode(), $1->getTypePointer(), 0, false, @2)) if (context->arraySetMaxSize($1->getAsSymbolNode(), $1->getTypePointer(), 0, false, @2))
context->recover(); context->recover();
} }
} else if ( $3->getAsConstantUnion()->getIConst(0) >= $1->getType().getArraySize()) { } else if (index >= $1->getType().getArraySize()) {
std::stringstream extraInfoStream; std::stringstream extraInfoStream;
extraInfoStream << "array index out of range '" << $3->getAsConstantUnion()->getIConst(0) << "'"; extraInfoStream << "array index out of range '" << index << "'";
std::string extraInfo = extraInfoStream.str(); std::string extraInfo = extraInfoStream.str();
context->error(@2, "", "[", extraInfo.c_str()); context->error(@2, "", "[", extraInfo.c_str());
context->recover(); context->recover();
index = $1->getType().getArraySize() - 1;
} }
} else if (($1->isVector() || $1->isMatrix()) && $1->getType().getNominalSize() <= index) {
std::stringstream extraInfoStream;
extraInfoStream << "field selection out of range '" << index << "'";
std::string extraInfo = extraInfoStream.str();
context->error(@2, "", "[", extraInfo.c_str());
context->recover();
index = $1->getType().getNominalSize() - 1;
} }
$3->getAsConstantUnion()->getUnionArrayPointer()->setIConst(index);
$$ = context->intermediate.addIndex(EOpIndexDirect, $1, $3, @2); $$ = context->intermediate.addIndex(EOpIndexDirect, $1, $3, @2);
} }
} else { } else {
...@@ -311,10 +322,8 @@ postfix_expression ...@@ -311,10 +322,8 @@ postfix_expression
context->error(@2, "", "[", "array must be redeclared with a size before being indexed with a variable"); context->error(@2, "", "[", "array must be redeclared with a size before being indexed with a variable");
context->recover(); context->recover();
} }
$$ = context->intermediate.addIndex(EOpIndexIndirect, $1, $3, @2); $$ = context->intermediate.addIndex(EOpIndexIndirect, $1, $3, @2);
} }
}
if ($$ == 0) { if ($$ == 0) {
ConstantUnion *unionArray = new ConstantUnion[1]; ConstantUnion *unionArray = new ConstantUnion[1];
unionArray->setFConst(0.0f); unionArray->setFConst(0.0f);
...@@ -327,17 +336,16 @@ postfix_expression ...@@ -327,17 +336,16 @@ postfix_expression
if ($1->getType().getQualifier() == EvqConst) if ($1->getType().getQualifier() == EvqConst)
$$->getTypePointer()->setQualifier(EvqConst); $$->getTypePointer()->setQualifier(EvqConst);
} else if ($1->isMatrix() && $1->getType().getQualifier() == EvqConst) } else if ($1->isMatrix()) {
$$->setType(TType($1->getBasicType(), $1->getPrecision(), EvqConst, $1->getNominalSize())); TQualifier qualifier = $1->getType().getQualifier() == EvqConst ? EvqConst : EvqTemporary;
else if ($1->isMatrix()) $$->setType(TType($1->getBasicType(), $1->getPrecision(), qualifier, $1->getNominalSize()));
$$->setType(TType($1->getBasicType(), $1->getPrecision(), EvqTemporary, $1->getNominalSize())); } else if ($1->isVector()) {
else if ($1->isVector() && $1->getType().getQualifier() == EvqConst) TQualifier qualifier = $1->getType().getQualifier() == EvqConst ? EvqConst : EvqTemporary;
$$->setType(TType($1->getBasicType(), $1->getPrecision(), EvqConst)); $$->setType(TType($1->getBasicType(), $1->getPrecision(), qualifier));
else if ($1->isVector()) } else {
$$->setType(TType($1->getBasicType(), $1->getPrecision(), EvqTemporary));
else
$$->setType($1->getType()); $$->setType($1->getType());
} }
}
| function_call { | function_call {
$$ = $1; $$ = $1;
} }
......
src/compiler/glslang_tab.cpp
...@@ -722,26 +722,26 @@ static const yytype_int16 yyrhs[] = ...@@ -722,26 +722,26 @@ static const yytype_int16 yyrhs[] =
static const yytype_uint16 yyrline[] = static const yytype_uint16 yyrline[] =
{ {
0, 187, 187, 188, 191, 227, 230, 243, 248, 253, 0, 187, 187, 188, 191, 227, 230, 243, 248, 253,
259, 262, 341, 344, 445, 455, 468, 476, 576, 579, 259, 262, 349, 352, 453, 463, 476, 484, 584, 587,
587, 590, 596, 600, 607, 613, 622, 630, 685, 695, 595, 598, 604, 608, 615, 621, 630, 638, 693, 703,
698, 708, 718, 739, 740, 741, 746, 747, 756, 768, 706, 716, 726, 747, 748, 749, 754, 755, 764, 776,
769, 777, 788, 792, 793, 803, 813, 823, 836, 837, 777, 785, 796, 800, 801, 811, 821, 831, 844, 845,
847, 860, 864, 868, 872, 873, 886, 887, 900, 901, 855, 868, 872, 876, 880, 881, 894, 895, 908, 909,
914, 915, 932, 933, 946, 947, 948, 949, 950, 954, 922, 923, 940, 941, 954, 955, 956, 957, 958, 962,
957, 968, 976, 1003, 1008, 1022, 1059, 1062, 1069, 1077, 965, 976, 984, 1011, 1016, 1030, 1067, 1070, 1077, 1085,
1098, 1119, 1129, 1157, 1162, 1172, 1177, 1187, 1190, 1193, 1106, 1127, 1137, 1165, 1170, 1180, 1185, 1195, 1198, 1201,
1196, 1202, 1209, 1212, 1234, 1252, 1276, 1299, 1303, 1321, 1204, 1210, 1217, 1220, 1242, 1260, 1284, 1307, 1311, 1329,
1329, 1361, 1381, 1470, 1479, 1502, 1505, 1511, 1519, 1527, 1337, 1369, 1389, 1478, 1487, 1510, 1513, 1519, 1527, 1535,
1535, 1545, 1552, 1555, 1558, 1564, 1567, 1582, 1586, 1590, 1543, 1553, 1560, 1563, 1566, 1572, 1575, 1590, 1594, 1598,
1594, 1603, 1608, 1613, 1618, 1623, 1628, 1633, 1638, 1643, 1602, 1611, 1616, 1621, 1626, 1631, 1636, 1641, 1646, 1651,
1648, 1654, 1660, 1666, 1671, 1676, 1685, 1694, 1699, 1712, 1656, 1662, 1668, 1674, 1679, 1684, 1693, 1702, 1707, 1720,
1712, 1726, 1726, 1735, 1738, 1754, 1790, 1794, 1800, 1807, 1720, 1734, 1734, 1743, 1746, 1762, 1798, 1802, 1808, 1815,
1822, 1826, 1830, 1831, 1837, 1838, 1839, 1840, 1841, 1845, 1830, 1834, 1838, 1839, 1845, 1846, 1847, 1848, 1849, 1853,
1846, 1846, 1846, 1856, 1857, 1861, 1861, 1862, 1862, 1867, 1854, 1854, 1854, 1864, 1865, 1869, 1869, 1870, 1870, 1875,
1870, 1880, 1883, 1889, 1890, 1894, 1902, 1906, 1916, 1921, 1878, 1888, 1891, 1897, 1898, 1902, 1910, 1914, 1924, 1929,
1938, 1938, 1943, 1943, 1950, 1950, 1958, 1961, 1967, 1970, 1946, 1946, 1951, 1951, 1958, 1958, 1966, 1969, 1975, 1978,
1976, 1980, 1987, 1994, 2001, 2008, 2019, 2028, 2032, 2039, 1984, 1988, 1995, 2002, 2009, 2016, 2027, 2036, 2040, 2047,
2042, 2048, 2048 2050, 2056, 2056
}; };
#endif #endif
...@@ -2354,43 +2354,54 @@ yyreduce: ...@@ -2354,43 +2354,54 @@ yyreduce:
context->error((yylsp[(2) - (4)]), " left of '[' is not of type array, matrix, or vector ", "expression"); context->error((yylsp[(2) - (4)]), " left of '[' is not of type array, matrix, or vector ", "expression");
context->recover(); context->recover();
} }
if ((yyvsp[(1) - (4)].interm.intermTypedNode)->getType().getQualifier() == EvqConst && (yyvsp[(3) - (4)].interm.intermTypedNode)->getQualifier() == EvqConst) { if ((yyvsp[(3) - (4)].interm.intermTypedNode)->getQualifier() == EvqConst) {
int index = (yyvsp[(3) - (4)].interm.intermTypedNode)->getAsConstantUnion()->getIConst(0);
if (index < 0) {
std::stringstream infoStream;
infoStream << index;
std::string info = infoStream.str();
context->error((yylsp[(3) - (4)]), "negative index", info.c_str());
context->recover();
index = 0;
}
if ((yyvsp[(1) - (4)].interm.intermTypedNode)->getType().getQualifier() == EvqConst) {
if ((yyvsp[(1) - (4)].interm.intermTypedNode)->isArray()) { // constant folding for arrays if ((yyvsp[(1) - (4)].interm.intermTypedNode)->isArray()) { // constant folding for arrays
(yyval.interm.intermTypedNode) = context->addConstArrayNode((yyvsp[(3) - (4)].interm.intermTypedNode)->getAsConstantUnion()->getIConst(0), (yyvsp[(1) - (4)].interm.intermTypedNode), (yylsp[(2) - (4)])); (yyval.interm.intermTypedNode) = context->addConstArrayNode(index, (yyvsp[(1) - (4)].interm.intermTypedNode), (yylsp[(2) - (4)]));
} else if ((yyvsp[(1) - (4)].interm.intermTypedNode)->isVector()) { // constant folding for vectors } else if ((yyvsp[(1) - (4)].interm.intermTypedNode)->isVector()) { // constant folding for vectors
TVectorFields fields; TVectorFields fields;
fields.num = 1; fields.num = 1;
fields.offsets[0] = (yyvsp[(3) - (4)].interm.intermTypedNode)->getAsConstantUnion()->getIConst(0); // need to do it this way because v.xy sends fields integer array fields.offsets[0] = index; // need to do it this way because v.xy sends fields integer array
(yyval.interm.intermTypedNode) = context->addConstVectorNode(fields, (yyvsp[(1) - (4)].interm.intermTypedNode), (yylsp[(2) - (4)])); (yyval.interm.intermTypedNode) = context->addConstVectorNode(fields, (yyvsp[(1) - (4)].interm.intermTypedNode), (yylsp[(2) - (4)]));
} else if ((yyvsp[(1) - (4)].interm.intermTypedNode)->isMatrix()) { // constant folding for matrices } else if ((yyvsp[(1) - (4)].interm.intermTypedNode)->isMatrix()) { // constant folding for matrices
(yyval.interm.intermTypedNode) = context->addConstMatrixNode((yyvsp[(3) - (4)].interm.intermTypedNode)->getAsConstantUnion()->getIConst(0), (yyvsp[(1) - (4)].interm.intermTypedNode), (yylsp[(2) - (4)])); (yyval.interm.intermTypedNode) = context->addConstMatrixNode(index, (yyvsp[(1) - (4)].interm.intermTypedNode), (yylsp[(2) - (4)]));
} }
} else { } else {
if ((yyvsp[(3) - (4)].interm.intermTypedNode)->getQualifier() == EvqConst) {
if (((yyvsp[(1) - (4)].interm.intermTypedNode)->isVector() || (yyvsp[(1) - (4)].interm.intermTypedNode)->isMatrix()) && (yyvsp[(1) - (4)].interm.intermTypedNode)->getType().getNominalSize() <= (yyvsp[(3) - (4)].interm.intermTypedNode)->getAsConstantUnion()->getIConst(0) && !(yyvsp[(1) - (4)].interm.intermTypedNode)->isArray() ) {
std::stringstream extraInfoStream;
extraInfoStream << "field selection out of range '" << (yyvsp[(3) - (4)].interm.intermTypedNode)->getAsConstantUnion()->getIConst(0) << "'";
std::string extraInfo = extraInfoStream.str();
context->error((yylsp[(2) - (4)]), "", "[", extraInfo.c_str());
context->recover();
} else {
if ((yyvsp[(1) - (4)].interm.intermTypedNode)->isArray()) { if ((yyvsp[(1) - (4)].interm.intermTypedNode)->isArray()) {
if ((yyvsp[(1) - (4)].interm.intermTypedNode)->getType().getArraySize() == 0) { if ((yyvsp[(1) - (4)].interm.intermTypedNode)->getType().getArraySize() == 0) {
if ((yyvsp[(1) - (4)].interm.intermTypedNode)->getType().getMaxArraySize() <= (yyvsp[(3) - (4)].interm.intermTypedNode)->getAsConstantUnion()->getIConst(0)) { if ((yyvsp[(1) - (4)].interm.intermTypedNode)->getType().getMaxArraySize() <= index) {
if (context->arraySetMaxSize((yyvsp[(1) - (4)].interm.intermTypedNode)->getAsSymbolNode(), (yyvsp[(1) - (4)].interm.intermTypedNode)->getTypePointer(), (yyvsp[(3) - (4)].interm.intermTypedNode)->getAsConstantUnion()->getIConst(0), true, (yylsp[(2) - (4)]))) if (context->arraySetMaxSize((yyvsp[(1) - (4)].interm.intermTypedNode)->getAsSymbolNode(), (yyvsp[(1) - (4)].interm.intermTypedNode)->getTypePointer(), index, true, (yylsp[(2) - (4)])))
context->recover(); context->recover();
} else { } else {
if (context->arraySetMaxSize((yyvsp[(1) - (4)].interm.intermTypedNode)->getAsSymbolNode(), (yyvsp[(1) - (4)].interm.intermTypedNode)->getTypePointer(), 0, false, (yylsp[(2) - (4)]))) if (context->arraySetMaxSize((yyvsp[(1) - (4)].interm.intermTypedNode)->getAsSymbolNode(), (yyvsp[(1) - (4)].interm.intermTypedNode)->getTypePointer(), 0, false, (yylsp[(2) - (4)])))
context->recover(); context->recover();
} }
} else if ( (yyvsp[(3) - (4)].interm.intermTypedNode)->getAsConstantUnion()->getIConst(0) >= (yyvsp[(1) - (4)].interm.intermTypedNode)->getType().getArraySize()) { } else if (index >= (yyvsp[(1) - (4)].interm.intermTypedNode)->getType().getArraySize()) {
std::stringstream extraInfoStream; std::stringstream extraInfoStream;
extraInfoStream << "array index out of range '" << (yyvsp[(3) - (4)].interm.intermTypedNode)->getAsConstantUnion()->getIConst(0) << "'"; extraInfoStream << "array index out of range '" << index << "'";
std::string extraInfo = extraInfoStream.str(); std::string extraInfo = extraInfoStream.str();
context->error((yylsp[(2) - (4)]), "", "[", extraInfo.c_str()); context->error((yylsp[(2) - (4)]), "", "[", extraInfo.c_str());
context->recover(); context->recover();
index = (yyvsp[(1) - (4)].interm.intermTypedNode)->getType().getArraySize() - 1;
} }
} else if (((yyvsp[(1) - (4)].interm.intermTypedNode)->isVector() || (yyvsp[(1) - (4)].interm.intermTypedNode)->isMatrix()) && (yyvsp[(1) - (4)].interm.intermTypedNode)->getType().getNominalSize() <= index) {
std::stringstream extraInfoStream;
extraInfoStream << "field selection out of range '" << index << "'";
std::string extraInfo = extraInfoStream.str();
context->error((yylsp[(2) - (4)]), "", "[", extraInfo.c_str());
context->recover();
index = (yyvsp[(1) - (4)].interm.intermTypedNode)->getType().getNominalSize() - 1;
} }
(yyvsp[(3) - (4)].interm.intermTypedNode)->getAsConstantUnion()->getUnionArrayPointer()->setIConst(index);
(yyval.interm.intermTypedNode) = context->intermediate.addIndex(EOpIndexDirect, (yyvsp[(1) - (4)].interm.intermTypedNode), (yyvsp[(3) - (4)].interm.intermTypedNode), (yylsp[(2) - (4)])); (yyval.interm.intermTypedNode) = context->intermediate.addIndex(EOpIndexDirect, (yyvsp[(1) - (4)].interm.intermTypedNode), (yyvsp[(3) - (4)].interm.intermTypedNode), (yylsp[(2) - (4)]));
} }
} else { } else {
...@@ -2398,10 +2409,8 @@ yyreduce: ...@@ -2398,10 +2409,8 @@ yyreduce:
context->error((yylsp[(2) - (4)]), "", "[", "array must be redeclared with a size before being indexed with a variable"); context->error((yylsp[(2) - (4)]), "", "[", "array must be redeclared with a size before being indexed with a variable");
context->recover(); context->recover();
} }
(yyval.interm.intermTypedNode) = context->intermediate.addIndex(EOpIndexIndirect, (yyvsp[(1) - (4)].interm.intermTypedNode), (yyvsp[(3) - (4)].interm.intermTypedNode), (yylsp[(2) - (4)])); (yyval.interm.intermTypedNode) = context->intermediate.addIndex(EOpIndexIndirect, (yyvsp[(1) - (4)].interm.intermTypedNode), (yyvsp[(3) - (4)].interm.intermTypedNode), (yylsp[(2) - (4)]));
} }
}
if ((yyval.interm.intermTypedNode) == 0) { if ((yyval.interm.intermTypedNode) == 0) {
ConstantUnion *unionArray = new ConstantUnion[1]; ConstantUnion *unionArray = new ConstantUnion[1];
unionArray->setFConst(0.0f); unionArray->setFConst(0.0f);
...@@ -2414,17 +2423,16 @@ yyreduce: ...@@ -2414,17 +2423,16 @@ yyreduce:
if ((yyvsp[(1) - (4)].interm.intermTypedNode)->getType().getQualifier() == EvqConst) if ((yyvsp[(1) - (4)].interm.intermTypedNode)->getType().getQualifier() == EvqConst)
(yyval.interm.intermTypedNode)->getTypePointer()->setQualifier(EvqConst); (yyval.interm.intermTypedNode)->getTypePointer()->setQualifier(EvqConst);
} else if ((yyvsp[(1) - (4)].interm.intermTypedNode)->isMatrix() && (yyvsp[(1) - (4)].interm.intermTypedNode)->getType().getQualifier() == EvqConst) } else if ((yyvsp[(1) - (4)].interm.intermTypedNode)->isMatrix()) {
(yyval.interm.intermTypedNode)->setType(TType((yyvsp[(1) - (4)].interm.intermTypedNode)->getBasicType(), (yyvsp[(1) - (4)].interm.intermTypedNode)->getPrecision(), EvqConst, (yyvsp[(1) - (4)].interm.intermTypedNode)->getNominalSize())); TQualifier qualifier = (yyvsp[(1) - (4)].interm.intermTypedNode)->getType().getQualifier() == EvqConst ? EvqConst : EvqTemporary;
else if ((yyvsp[(1) - (4)].interm.intermTypedNode)->isMatrix()) (yyval.interm.intermTypedNode)->setType(TType((yyvsp[(1) - (4)].interm.intermTypedNode)->getBasicType(), (yyvsp[(1) - (4)].interm.intermTypedNode)->getPrecision(), qualifier, (yyvsp[(1) - (4)].interm.intermTypedNode)->getNominalSize()));
(yyval.interm.intermTypedNode)->setType(TType((yyvsp[(1) - (4)].interm.intermTypedNode)->getBasicType(), (yyvsp[(1) - (4)].interm.intermTypedNode)->getPrecision(), EvqTemporary, (yyvsp[(1) - (4)].interm.intermTypedNode)->getNominalSize())); } else if ((yyvsp[(1) - (4)].interm.intermTypedNode)->isVector()) {
else if ((yyvsp[(1) - (4)].interm.intermTypedNode)->isVector() && (yyvsp[(1) - (4)].interm.intermTypedNode)->getType().getQualifier() == EvqConst) TQualifier qualifier = (yyvsp[(1) - (4)].interm.intermTypedNode)->getType().getQualifier() == EvqConst ? EvqConst : EvqTemporary;
(yyval.interm.intermTypedNode)->setType(TType((yyvsp[(1) - (4)].interm.intermTypedNode)->getBasicType(), (yyvsp[(1) - (4)].interm.intermTypedNode)->getPrecision(), EvqConst)); (yyval.interm.intermTypedNode)->setType(TType((yyvsp[(1) - (4)].interm.intermTypedNode)->getBasicType(), (yyvsp[(1) - (4)].interm.intermTypedNode)->getPrecision(), qualifier));
else if ((yyvsp[(1) - (4)].interm.intermTypedNode)->isVector()) } else {
(yyval.interm.intermTypedNode)->setType(TType((yyvsp[(1) - (4)].interm.intermTypedNode)->getBasicType(), (yyvsp[(1) - (4)].interm.intermTypedNode)->getPrecision(), EvqTemporary));
else
(yyval.interm.intermTypedNode)->setType((yyvsp[(1) - (4)].interm.intermTypedNode)->getType()); (yyval.interm.intermTypedNode)->setType((yyvsp[(1) - (4)].interm.intermTypedNode)->getType());
} }
}
break; break;
case 12: case 12:
......
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