3 ms·

I would think C# is easier for this due to having proper (and very convenient) pattern matching.

• zkldi 3y ago
  C# doesn't have anything resembling proper pattern matching. C#s pattern matching is akin to a marginally improved switch or if/else-if chain. C#s pattern matches aren't exhaustive, and the compiler doesn't properly check them at all.[0] There are no proper sum types in C#, so 80% of the point isn't even there. enum Season { Spring, Summer, Autumn, Winter } ... int PatternMatch(Season season) => season switch { Season.Spring => 1, Season.Summer => 2, Season.Autumn => 3, Season.Winter => 4, // compiler can't prove the above code is exhaustive because no proper sum types // compiler needs nonsensical branch here that diverges _ => throw new ArgumentException("Invalid enum value for command", nameof(command)), };
  • hardware2win 3y ago
    >compiler can't prove the above code is exhaustive because no proper sum types Thats because c#s enum is not "closed" https://github.com/dotnet/csharplang/issues/3179 https://github.com/dotnet/csharplang/issues/3179
    • deleted 3y ago
      [deleted]
  • paddim8 3y ago
    These things are not about pattern matching but about other language features.