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Code Issues Wiki Activity

fix bug 95734: conversion of integer literal 0 to pointer, also conversion of pointer to boolean

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This commit is contained in:
Andrew Niefer 2005-05-18 20:34:09 +00:00
parent 59e8ca66d9
commit 238118db0b
2 changed files with 69 additions and 2 deletions
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37
core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2CPPTests.java
View file

@ -4307,4 +4307,41 @@ public class AST2CPPTests extends AST2BaseTest {
ICPPMethod op = (ICPPMethod) col.getName(2).resolveBinding();
assertSame( op, col.getName(6).resolveBinding() );
}
public void testBug95734() throws Exception {
StringBuffer buffer = new StringBuffer();
buffer.append("int str( const char * ); \n"); //$NON-NLS-1$
buffer.append("void f(){ \n"); //$NON-NLS-1$
buffer.append(" str( 0 ); \n"); //$NON-NLS-1$
buffer.append(" str( 00 ); str( 0x0 ); \n"); //$NON-NLS-1$
buffer.append("} \n"); //$NON-NLS-1$
IASTTranslationUnit tu = parse( buffer.toString(), ParserLanguage.CPP );
CPPNameCollector col = new CPPNameCollector();
tu.accept(col);
ICPPFunction str = (ICPPFunction) col.getName(0).resolveBinding();
assertSame( str, col.getName(3).resolveBinding() );
assertSame( str, col.getName(4).resolveBinding() );
assertSame( str, col.getName(5).resolveBinding() );
}
public void testBug95734_2() throws Exception {
StringBuffer buffer = new StringBuffer();
buffer.append("int str( bool ); \n"); //$NON-NLS-1$
buffer.append("enum { ONE }; \n"); //$NON-NLS-1$
buffer.append("void f( char * p ){ \n"); //$NON-NLS-1$
buffer.append(" str( 1.2 ); \n"); //$NON-NLS-1$
buffer.append(" str( ONE ); str( p ); \n"); //$NON-NLS-1$
buffer.append("} \n"); //$NON-NLS-1$
IASTTranslationUnit tu = parse( buffer.toString(), ParserLanguage.CPP );
CPPNameCollector col = new CPPNameCollector();
tu.accept(col);
ICPPFunction str = (ICPPFunction) col.getName(0).resolveBinding();
assertSame( str, col.getName(6).resolveBinding() );
assertSame( str, col.getName(7).resolveBinding() );
assertSame( str, col.getName(9).resolveBinding() );
}
}

34
core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPSemantics.java
View file

@ -2646,6 +2646,21 @@ public class CPPSemantics {
IQualifierType qs = (IQualifierType) s, qt = (IQualifierType) t;
if( qs.isConst() && !qt.isConst() || qs.isVolatile() && !qt.isVolatile() )
canConvert = false;
} else if( constInEveryCV2k && !canConvert ){
canConvert = true;
int i = 1;
for( IType type = s; canConvert == true && i == 1; type = t, i++ ){
while( type instanceof ITypeContainer ){
if( type instanceof IQualifierType )
canConvert = false;
else if( type instanceof IPointerType ){
canConvert = !((IPointerType)type).isConst() && !((IPointerType)type).isVolatile();
}
if( !canConvert )
break;
type = ((ITypeContainer)type).getType();
}
}
}
if( canConvert == true ){
@ -2718,7 +2733,18 @@ public class CPPSemantics {
sPrev = next;
}
if( sPrev instanceof IPointerType && s instanceof ICPPClassType ){
if( src instanceof IBasicType && trg instanceof IPointerType ){
//4.10-1 an integral constant expression of integer type that evaluates to 0 can be converted to a pointer type
IASTExpression exp = ((IBasicType)src).getValue();
if( exp instanceof IASTLiteralExpression &&
((IASTLiteralExpression)exp).getKind() == IASTLiteralExpression.lk_integer_constant )
{
if( Integer.decode( exp.toString() ).intValue() == 0 ){
cost.rank = Cost.CONVERSION_RANK;
cost.conversion = 1;
}
}
} else if( sPrev instanceof IPointerType && s instanceof ICPPClassType ){
IType tPrev = trg;
while( tPrev instanceof ITypeContainer ){
IType next = ((ITypeContainer)tPrev).getType();
@ -2749,6 +2775,10 @@ public class CPPSemantics {
//An rvalue of an enumeration type can be converted to an rvalue of an integer type.
cost.rank = Cost.CONVERSION_RANK;
cost.conversion = 1;
} else if( t instanceof IBasicType && ((IBasicType)t).getType() == ICPPBasicType.t_bool && s instanceof IPointerType ){
//4.12 pointer or pointer to member type can be converted to an rvalue of type bool
cost.rank = Cost.CONVERSION_RANK;
cost.conversion = 1;
} else if( s instanceof ICPPPointerToMemberType && t instanceof ICPPPointerToMemberType ){
//4.11-2 An rvalue of type "pointer to member of B of type cv T", where B is a class type,
//can be converted to an rvalue of type "pointer to member of D of type cv T" where D is a
@ -2761,7 +2791,7 @@ public class CPPSemantics {
cost.conversion = ( temp > -1 ) ? temp : 0;
cost.detail = 1;
}
}
}
}
static private void derivedToBaseConversion( Cost cost ) throws DOMException {