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Code Issues Wiki Activity

Nested template-id ambiguity, bug 259501.

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This commit is contained in:
Markus Schorn 2009-01-08 12:58:25 +00:00
parent f22dca4261
commit 4c5c6bc7d3
3 changed files with 38 additions and 26 deletions
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15
core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2CPPTests.java
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@ -6331,4 +6331,19 @@ public class AST2CPPTests extends AST2BaseTest {
ICPPFunction f2= ba.assertNonProblem("func(*b)", 4, ICPPFunction.class); ICPPFunction f2= ba.assertNonProblem("func(*b)", 4, ICPPFunction.class);
assertNotSame(f1, f2); assertNotSame(f1, f2);
} }
// struct C {int a;};
// void myfunc(C c) {
// return c < c.a ||
// (c == c.a && (c<c.a || (c == c.a && (c<c.a || (c == c.a && (c<c.a ||
// (c == c.a && (c<c.a || (c == c.a && (c<c.a || (c == c.a && (c<c.a ||
// (c == c.a && (c<c.a || (c == c.a && (c<c.a || (c == c.a && (c<c.a ||
// (c == c.a && (c<c.a || (c == c.a && (c<c.a || (c == c.a && (c<c.a ||
// (c == c.a && (c<c.a || (c == c.a && (c<c.a || (c == c.a && (c<c.a
// ))))))))))))))))))))))))))))));
// }
public void testNestedTemplateIDAmbiguity_259501() throws Exception {
final String code= getAboveComment();
parseAndCheckBindings(code);
}
} }

16
core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/AbstractGNUSourceCodeParser.java
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@ -947,6 +947,10 @@ public abstract class AbstractGNUSourceCodeParser implements ISourceCodeParser {
protected IASTExpression logicalOrExpression() throws BacktrackException, EndOfFileException { protected IASTExpression logicalOrExpression() throws BacktrackException, EndOfFileException {
IASTExpression firstExpression = logicalAndExpression(); IASTExpression firstExpression = logicalAndExpression();
while (LT(1) == IToken.tOR) { while (LT(1) == IToken.tOR) {
if (shallRejectLogicalOperator()) {
throwBacktrack(LA(1));
}
consume(); consume();
IASTExpression secondExpression = logicalAndExpression(); IASTExpression secondExpression = logicalAndExpression();
firstExpression = buildBinaryExpression( firstExpression = buildBinaryExpression(
@ -956,9 +960,17 @@ public abstract class AbstractGNUSourceCodeParser implements ISourceCodeParser {
return firstExpression; return firstExpression;
} }
protected boolean shallRejectLogicalOperator() {
return false;
}
protected IASTExpression logicalAndExpression() throws BacktrackException, EndOfFileException { protected IASTExpression logicalAndExpression() throws BacktrackException, EndOfFileException {
IASTExpression firstExpression = inclusiveOrExpression(); IASTExpression firstExpression = inclusiveOrExpression();
while (LT(1) == IToken.tAND) { while (LT(1) == IToken.tAND) {
if (shallRejectLogicalOperator()) {
throwBacktrack(LA(1));
}
consume(); consume();
IASTExpression secondExpression = inclusiveOrExpression(); IASTExpression secondExpression = inclusiveOrExpression();
firstExpression = buildBinaryExpression( firstExpression = buildBinaryExpression(
@ -1124,6 +1136,10 @@ public abstract class AbstractGNUSourceCodeParser implements ISourceCodeParser {
protected IASTExpression conditionalExpression() throws BacktrackException, EndOfFileException { protected IASTExpression conditionalExpression() throws BacktrackException, EndOfFileException {
IASTExpression firstExpression = logicalOrExpression(); IASTExpression firstExpression = logicalOrExpression();
if (LT(1) == IToken.tQUESTION) { if (LT(1) == IToken.tQUESTION) {
if (shallRejectLogicalOperator()) {
throwBacktrack(LA(1));
}
consume(); consume();
IASTExpression secondExpression= null; IASTExpression secondExpression= null;
if (LT(1) != IToken.tCOLON) { if (LT(1) != IToken.tCOLON) {

29
core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/GNUCPPSourceParser.java
View file

@ -201,16 +201,12 @@ public class GNUCPPSourceParser extends AbstractGNUSourceCodeParser {
protected IASTName idExpression() throws EndOfFileException, BacktrackException { protected IASTName idExpression() throws EndOfFileException, BacktrackException {
try { try {
if (true) {
rejectLogicalOperatorInTemplateID++; rejectLogicalOperatorInTemplateID++;
}
return qualifiedName(); return qualifiedName();
} finally { } finally {
if (true) {
rejectLogicalOperatorInTemplateID--; rejectLogicalOperatorInTemplateID--;
} }
} }
}
/** /**
* Parse a name. * Parse a name.
@ -592,27 +588,9 @@ public class GNUCPPSourceParser extends AbstractGNUSourceCodeParser {
} }
@Override @Override
protected IASTExpression conditionalExpression() throws BacktrackException, EndOfFileException { protected boolean shallRejectLogicalOperator() {
final IASTExpression expr= super.conditionalExpression(); return onTopInTemplateArgs && rejectLogicalOperatorInTemplateID > 0;
if (onTopInTemplateArgs && rejectLogicalOperatorInTemplateID > 0) {
// bug 104706, don't allow usage of logical operators in template argument lists.
if (expr instanceof IASTConditionalExpression) {
final ASTNode node = (ASTNode) expr;
throwBacktrack(node.getOffset(), node.getLength());
} }
else if (expr instanceof IASTBinaryExpression) {
IASTBinaryExpression bexpr= (IASTBinaryExpression) expr;
switch (bexpr.getOperator()) {
case IASTBinaryExpression.op_logicalAnd:
case IASTBinaryExpression.op_logicalOr:
final ASTNode node = (ASTNode) expr;
throwBacktrack(node.getOffset(), node.getLength());
}
}
}
return expr;
}
@Override @Override
protected IASTExpression constantExpression() throws EndOfFileException, BacktrackException { protected IASTExpression constantExpression() throws EndOfFileException, BacktrackException {
@ -2763,6 +2741,7 @@ public class GNUCPPSourceParser extends AbstractGNUSourceCodeParser {
int startingOffset = mark.getOffset(); int startingOffset = mark.getOffset();
IASTDeclSpecifier declSpecifier = null; IASTDeclSpecifier declSpecifier = null;
IASTDeclarator declarator = null; IASTDeclarator declarator = null;
rejectLogicalOperatorInTemplateID++;
try { try {
declSpecifier = declSpecifierSeq(option); declSpecifier = declSpecifierSeq(option);
if (LT(1) != IToken.tEOC) { if (LT(1) != IToken.tEOC) {
@ -2777,6 +2756,8 @@ public class GNUCPPSourceParser extends AbstractGNUSourceCodeParser {
return null; return null;
} catch (BacktrackException bt) { } catch (BacktrackException bt) {
return null; return null;
} finally {
rejectLogicalOperatorInTemplateID--;
} }
IASTTypeId result = nodeFactory.newTypeId(declSpecifier, declarator); IASTTypeId result = nodeFactory.newTypeId(declSpecifier, declarator);
((ASTNode) result).setOffsetAndLength(startingOffset, figureEndOffset(declSpecifier, declarator) - startingOffset); ((ASTNode) result).setOffsetAndLength(startingOffset, figureEndOffset(declSpecifier, declarator) - startingOffset);