230V Posts - Answer Overflow

230V

•Created by 230V on 5/18/2023 in #help

✅ a class implementing a generic interface with more than one interface as one generic type argument

I'm making a serializer (not for JSON), trying hard to use generics ~~and trimmable methods~~ wherever possible. I have:

interface IConverter {} //exists just for the attribute
interface IConverter<T>
{
  //the methods could be static, but I'd need to use a bit more reflection than just Activator.CreateInstance<> to call them
  void Serialize(TextWriter w, in T t, ...);
  void Deserialize(TextReader r, ref T t, ...);
}

///usage: type T { [Converter<X>] V v; } class X : IConverter<V> {}
///built-in converters, such as ParseableFormattableConverter, will be chosen from a dictionary
class ConverterAttribute<T> : Attribute where T : IConverter //can't do T : IConverter<?>
//ex.:
class A : IConverter<Q> {}
class B : IConverter<W> {}

interface IConverter {} //exists just for the attribute
interface IConverter<T>
{
  //the methods could be static, but I'd need to use a bit more reflection than just Activator.CreateInstance<> to call them
  void Serialize(TextWriter w, in T t, ...);
  void Deserialize(TextReader r, ref T t, ...);
}

///usage: type T { [Converter<X>] V v; } class X : IConverter<V> {}
///built-in converters, such as ParseableFormattableConverter, will be chosen from a dictionary
class ConverterAttribute<T> : Attribute where T : IConverter //can't do T : IConverter<?>
//ex.:
class A : IConverter<Q> {}
class B : IConverter<W> {}

Now I want to make a single converter that forwards to IParseable and IFormattable methods, but I can't see how this could be done.

///handles everything that's IParseable and IFormattable, such as DateTime, TimeSpan, long, int, short
///to avoid one converter per each built-in common type (would be an STJ moment)
class ParseableFormattableConverter : IConverter<TCombination/*???*/>
  where TCombination : IFormattable, IParseable<?????>
{
  void Serialize(TextWriter w, in TCombination t) => t.ToString(null, null);
  void Deserialize(TextReader r, ref TCombination t) => t = ref TCombination.Parse(r.Read()); //more or less
}

///handles everything that's IParseable and IFormattable, such as DateTime, TimeSpan, long, int, short
///to avoid one converter per each built-in common type (would be an STJ moment)
class ParseableFormattableConverter : IConverter<TCombination/*???*/>
  where TCombination : IFormattable, IParseable<?????>
{
  void Serialize(TextWriter w, in TCombination t) => t.ToString(null, null);
  void Deserialize(TextReader r, ref TCombination t) => t = ref TCombination.Parse(r.Read()); //more or less
}

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