internal static bool TryAssertNullAsType(this IEdmNullExpression expression, IEdmTypeReference type, out IEnumerable <EdmError> discoveredErrors)
{
if (!type.IsNullable)
{
discoveredErrors = new EdmError[] { new EdmError(expression.Location(), EdmErrorCode.NullCannotBeAssertedToBeANonNullableType, Edm.Strings.EdmModel_Validator_Semantic_NullCannotBeAssertedToBeANonNullableType) };
return(false);
}
discoveredErrors = Enumerable.Empty <EdmError>();
return(true);
}
protected override void ProcessNullConstantExpression(IEdmNullExpression expression)
{
this.schemaWriter.WriteNullConstantExpressionElement(expression);
}
internal void WriteNullConstantExpressionElement(IEdmNullExpression expression)
{
this.xmlWriter.WriteStartElement(CsdlConstants.Element_Null);
this.WriteEndElement();
}
protected virtual void ProcessNullConstantExpression(IEdmNullExpression expression)
{
this.ProcessExpression(expression);
}
internal abstract void WriteNullConstantExpressionElement(IEdmNullExpression expression);
