2 ms·

Yes, but see the section on custom unions* - you can write non-boxing unions/generators. * https://devblogs.microsoft.com/dotnet/csharp-15-union-types/#custom-

Yes, but see the section on custom unions* - you can write non-boxing unions/generators. * https://devblogs.microsoft.com/dotnet/csharp-15-union-types/#custom-unions-for-existing-libraries https://devblogs.microsoft.com/dotnet/csharp-15-union-types/...

mwkaufma 7mo ago
Yes, there's a compat-shim in the stdlib/runtime, but not in the language syntax. E.g. it by-definition won't do escape-analysis and optimize discriminated value-types with the first-class keyword.
- Izikiel43 7mo ago
  For now