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 RefConverter(Type pointType)
{
this.pointType = pointType;
var valueProperty = pointType.GetProperty(nameof(Ref <bool> .Value));
valueConverter = new SymbolicConverter(valueProperty.PropertyType);
}
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));
}
public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
{
var sourceType = value.GetType();
if (sourceType == pointType)
{
return(value);
}
if (sourceType == typeof(string))
{
return(ConvertFrom(context, culture, Symbol.FromString((string)value)));
}
if (sourceType == typeof(Symbol))
{
var symbol = (Symbol)value;
try
{
var symbols = symbol.AsSymbols;
var fields = symbols
.Select((fieldSymbol, index) => {
var fieldName = "Item" + (index + 1);
var fieldProperty = pointType.GetProperty(fieldName, BindingFlags.Public | BindingFlags.Instance);
var fieldConverter = new SymbolicConverter(fieldProperty.PropertyType);
var fieldValue = fieldSymbol.Match(
atom => fieldConverter.ConvertFromString(atom),
number => fieldConverter.ConvertFromString(number),
str => fieldConverter.ConvertFromString(SymbolParser.Explicitize(str)),
_ => fieldSymbol,
_ => fieldConverter.ConvertFrom(fieldSymbol));
return(fieldValue);
})
.ToArray();
return(Activator.CreateInstance(pointType, fields));
}
catch (Exception exn)
{
throw new ArgumentException($"Invalid form '{symbol}' for {value.GetType().FullName}. Required form is '[Value ...]'.", exn);
}
}
return(base.ConvertFrom(context, culture, value));
}
public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
{
var sourceType = value.GetType();
if (sourceType == pointType)
{
return(value);
}
if (sourceType == typeof(string))
{
return(ConvertFrom(context, culture, Symbol.FromString((string)value)));
}
if (sourceType == typeof(Symbol))
{
var symbol = (Symbol)value;
try
{
var fields = symbol.AsSymbols;
var tagField = pointType.GetField(nameof(Union <bool, bool> .Tag));
var tagConverter = new SymbolicConverter(tagField.FieldType);
var tag = (Enum)tagConverter.ConvertFromString(fields[0].AsAtom);
var dataField = pointType.GetField(nameof(Union <bool, bool> .Data));
var dataConverter = new SymbolicConverter(tag.TryGetAttributeOfType <UnionAttribute>().TryThen(attr => attr.Type) ?? dataField.FieldType);
var data = fields[1].Match(
atom => dataConverter.ConvertFromString(atom),
number => dataConverter.ConvertFromString(number),
str => dataConverter.ConvertFromString(SymbolParser.Explicitize(str)),
_ => fields[1],
_ => dataConverter.ConvertFrom(fields[1]));
return(Activator.CreateInstance(pointType, new object[] { tag, data }));
}
catch (Exception exn)
{
throw new ArgumentException($"Invalid form '{symbol}' for {value.GetType().FullName}. Required form is '[Enum Value]'.", exn);
}
}
return(base.ConvertFrom(context, culture, value));
}
public static T StringToValue <T>(string str)
{
var converter = new SymbolicConverter(typeof(T));
return((T)converter.ConvertFromString(str));
}
public static string ValueToString <T>(T value)
{
var converter = new SymbolicConverter(typeof(T));
return(converter.ConvertToString(value));
}
public static Symbol ValueToSymbol <T>(T value)
{
var converter = new SymbolicConverter(typeof(T));
return((Symbol)converter.ConvertTo(value, typeof(Symbol)));
}