OneOf.TypeExtensions 0.1.0-beta

OneOf.TypeExtensions

An incremental source generator that creates extension methods for OneOf<> types for more readable code.

Installation

Via nuget NuGet\Install-Package OneOf.TypeExtensions

Example Generated Code

For the type OneOf<int, string>, these extension methods will be generated.

// <auto-generated>

using OneOf;

public static partial class OneOfTypeExtensions
{
    public static bool IsString(this OneOf<string, int> oneOf)
    {
        return oneOf.IsT0;
    }
    public static string AsString(this OneOf<string, int> oneOf)
    {
        return oneOf.AsT0;
    }
    public static OneOf<TResult, int> MapString<TResult>(this OneOf<string, int> oneOf, Func<string, TResult> mapFunc)
    {
        return oneOf.MapT0(mapFunc);
    }
    public static bool TryPickString(this OneOf<string, int> oneOf, out string value, out int remainder)
    {
        return oneOf.TryPickT0(out value, out remainder);
    }
    public static bool IsInt(this OneOf<string, int> oneOf)
    {
        return oneOf.IsT1;
    }
    public static int AsInt(this OneOf<string, int> oneOf)
    {
        return oneOf.AsT1;
    }
    public static OneOf<string, TResult> MapInt<TResult>(this OneOf<string, int> oneOf, Func<int, TResult> mapFunc)
    {
        return oneOf.MapT1(mapFunc);
    }
    public static bool TryPickInt(this OneOf<string, int> oneOf, out int value, out string remainder)
    {
        return oneOf.TryPickT1(out value, out remainder);
    }
}

Supported Types

I believe the generator should support practically any type, if you find a type or combination of types that causes an error, feel free to create an issue or submit a PR.

Special consideration was given to support these types

• Nullable value types int?
• Nullable annotated reference types string?
• Value Tuples (int?, string?)
• Generics List<int?>
• Multiple Generics Dictionary<string?, int?>
• Nested generics List<List<int?>>
• Nested types Class1.Class2
• Any combination of the above