IType GetEnumeratorItemTypeFromAttribute(IType iteratorType)
{
// If iterator type is external get its attributes via reflection
if (iteratorType is ExternalType)
{
return(GetExternalEnumeratorItemType(iteratorType));
}
// If iterator type is a generic constructed type, map its attribute from its definition
GenericConstructedType constructedType = iteratorType as GenericConstructedType;
if (constructedType != null)
{
return(constructedType.GenericMapping.Map(
GetEnumeratorItemTypeFromAttribute(constructedType.GenericDefinition)));
}
// If iterator type is internal get its attributes from its type definition
AbstractInternalType internalType = (AbstractInternalType)iteratorType;
IType enumeratorItemTypeAttribute = Map(typeof(EnumeratorItemTypeAttribute));
foreach (Attribute attribute in internalType.TypeDefinition.Attributes)
{
IConstructor constructor = GetEntity(attribute) as IConstructor;
if (null != constructor)
{
if (constructor.DeclaringType == enumeratorItemTypeAttribute)
{
return(GetType(attribute.Arguments[0]));
}
}
}
return(null);
}
IType GetEnumeratorItemTypeFromAttribute(IType iteratorType)
{
AbstractInternalType internalType = iteratorType as AbstractInternalType;
if (null == internalType)
{
return(GetExternalEnumeratorItemType(iteratorType));
}
IType enumeratorItemTypeAttribute = Map(typeof(EnumeratorItemTypeAttribute));
foreach (Attribute attribute in internalType.TypeDefinition.Attributes)
{
IConstructor constructor = GetEntity(attribute) as IConstructor;
if (null != constructor)
{
if (constructor.DeclaringType == enumeratorItemTypeAttribute)
{
return(GetType(attribute.Arguments[0]));
}
}
}
return(null);
}
private void CheckForCycles(TypeReference baseTypeRef, AbstractInternalType baseType, List<TypeDefinition> visited)
{
if (visited.Contains(baseType.TypeDefinition))
{
BaseTypeError(CompilerErrorFactory.InheritanceCycle(baseTypeRef, baseType.FullName));
return;
}
new BaseTypeResolution(Context, baseType.TypeDefinition, visited);
}
public InternalGenericParameter(TypeSystemServices tss, GenericParameterDeclaration declaration, AbstractInternalType declaringType, int position)
: this(tss, declaration, position)
{
_declaringType = declaringType;
}