public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
{
if (destinationType == pointType)
{
return(value);
}
if (destinationType == typeof(string))
{
return(ConvertTo(context, culture, value, typeof(Symbol)).ToString());
}
if (destinationType == typeof(Symbol))
{
var tagField = pointType.GetField(nameof(Union <bool, bool> .Tag));
var tag = (Enum)tagField.GetValue(value);
var tagConverter = new SymbolicConverter(tagField.FieldType);
var tagSymbol = new Symbol(tagConverter.ConvertToString(tag));
var dataField = pointType.GetField(nameof(Union <bool, bool> .Data));
var data = dataField.GetValue(value);
var dataConverter = new SymbolicConverter(tag.TryGetAttributeOfType <UnionAttribute>().TryThen(attr => attr.Type) ?? dataField.FieldType);
var dataSymbol = dataConverter.CanConvertTo(typeof(Symbol)) ? (Symbol)dataConverter.ConvertTo(data, typeof(Symbol)) : new Symbol(dataConverter.ConvertToString(data));
return(new Symbol(new List <Symbol>()
{
tagSymbol, dataSymbol
}));
}
return(base.ConvertTo(context, culture, value, destinationType));
}
public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
{
if (destinationType == pointType)
{
return(value);
}
if (destinationType == typeof(string))
{
return(ConvertTo(context, culture, value, typeof(Symbol)).ToString());
}
if (destinationType == typeof(Symbol))
{
var recordType = pointType.GetConcreteTypes().Where(type => type.Name.StartsWith("Record`")).First();
var recordSize = recordType.GetGenericArguments().Length;
var fieldSymbols =
Enumerable.Range(0, recordSize).Select(index =>
{
var fieldName = "Item" + (index + 1);
var field = pointType.GetProperty(fieldName, BindingFlags.Public | BindingFlags.Instance);
var fieldValue = field.GetValue(value, null);
var fieldConverter = new SymbolicConverter(field.PropertyType);
return(fieldConverter.CanConvertTo(typeof(Symbol)) ? (Symbol)fieldConverter.ConvertTo(fieldValue, typeof(Symbol)) : new Symbol(fieldConverter.ConvertToString(fieldValue)));
});
return(new Symbol(fieldSymbols));
}
return(base.ConvertTo(context, culture, value, destinationType));
}
