public virtual void Add(CUnionType union)
{
foreach (CTypeRef type in union.types)
{
Add(type);
}
}
public virtual void Add(CUnionType union)
{
foreach (CTypeRef type in union.types)
Add(type);
}
public virtual bool canConvertTo(CClass klass)
{
// check the easy cases
if (ReferenceEquals(klass, this))
{
return(true);
}
else if (ReferenceEquals(klass, null))
{
return(false);
}
// convert union types
else if (this is CUnionType)
{
return(canUnionConvert(klass));
}
else if (klass is CUnionType)
{
CUnionType union = ((CUnionType)klass);
foreach (CClass type in union.Types)
{
if (canConvertTo(type))
{
return(true);
}
}
return(false);
}
// check for nothing conversions
else if (klass.className.Value == ("Nothing"))
{
return(isObject || (this is CArrayType) || this == BuiltIns.String);
}
else if (className.Value == ("Nothing"))
{
return(klass.isObject || (klass is CArrayType) || klass == BuiltIns.String);
}
// Variants can convert to anything but Null
else if ((klass.className.Value == ("__Variant") || className.Value == ("__Variant")) &&
!(klass.className.Value == ("DbNull") || className.Value == ("DbNull")))
{
return(true);
}
// check for strings
else if (klass.className.Value == ("String"))
{
return(canConvertToString);
}
// Object is like variant but only for objects
else if ((klass.className.Value == ("__Object") || className.Value == ("__Object")) &&
(klass.isObject && isObject))
{
return(true);
}
// Check for Array casts
else if (this is CArrayType && klass is CArrayType)
{
return(canArrayConvert((CArrayType)klass));
}
// Casts are always possible to base classes.
else if (CClass.IsSubClass(this, klass))
{
return(true);
}
// Casts are always possible to interfaces.
else if (CClass.Implements(this, klass))
{
return(true);
}
// Otherwise use the convertsTo hash
else
{
if (klass.className.Value == className.Value)
{
throw new ApplicationException(className.RawValue + ": Multiple class objects with the same name");
}
return(convertsTo.ContainsKey(klass));
}
}
