ValueVariant 0.5.0

dotnet add package ValueVariant --version 0.5.0
NuGet\Install-Package ValueVariant -Version 0.5.0
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="ValueVariant" Version="0.5.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add ValueVariant --version 0.5.0
#r "nuget: ValueVariant, 0.5.0"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install ValueVariant as a Cake Addin
#addin nuget:?package=ValueVariant&version=0.5.0

// Install ValueVariant as a Cake Tool
#tool nuget:?package=ValueVariant&version=0.5.0

ValueVariant

GitHub Nuget Nuget

C# source generator to generate efficient and type-safe variant types for unmanaged types.

Usage

using ValueVariant;

[ValueVariant]
public readonly partial struct SampleVariant: IValueVariant<SampleVariant, int, long, float> { }

will generates

readonly partial struct SampleVariant: IEquatable<SampleVariant>
{
    [StructLayout(LayoutKind.Explicit)]
    private struct Union
    {
        [FieldOffset(0)] int Item1;
        [FieldOffset(0)] long Item2;
        [FieldOffset(0)] float Item3;
    }

    public enum TypeIndex : byte { None, Type1, Type2, Type3 }

    private readonly Union Value;

    public readonly TypeIndex Index;

    public int Item1 => Index == TypeIndex.Type1 ? Value.Item1 : throw new InvalidCastException();
    public long Item2 => Index == TypeIndex.Type2 ? Value.Item2 : throw new InvalidCastException();
    public float Item3 => Index == TypeIndex.Type3 ? Value.Item3 : throw new InvalidCastException();

    public SampleVariant(int value) { ... }
    public SampleVariant(long value) { ... }
    public SampleVariant(float value) { ... }

    public static implicit operator SampleVariant(int value) => new SampleVariant(value);
    public static implicit operator SampleVariant(long value) => new SampleVariant(value);
    public static implicit operator SampleVariant(float value) => new SampleVariant(value);

    public static explicit operator int(SampleVariant value) => value.Item1;
    public static explicit operator long(SampleVariant value) => value.Item2;
    public static explicit operator float(SampleVariant value) => value.Item3;

    public bool Equals(SampleVariant other) { ... }
    public override bool Equals(object obj) { ... }
    public override int GetHashCode() { ... }
    public override string ToString() { ... }

    public static bool operator ==(SampleVariant lhs, SampleVariant rhs) { ... }
    public static bool operator !=(SampleVariant lhs, SampleVariant rhs) { ... }

    ...
}

Type conversion between variant types

[ValueVariant]
public readonly partial struct SampleVariant1 : IValueVariant<SampleVariant1, int, Guid, DateTime>
{
    public static explicit operator SampleVariant1(SampleVariant2 value)
        => value.Accept(SampleVariant2Converter.Instance);

    private sealed class SampleVariant2Converter : DefaultConverter<SampleVariant2Converter>, SampleVariant2.IFuncVisitor<SampleVariant1>
    {
        public SampleVariant1 Visit(in long value) => throw new InvalidCastException();
        public SampleVariant1 Visit(in bool value) => throw new InvalidCastException();
    }
}

[ValueVariant]
public readonly partial struct SampleVariant2 : IValueVariant<SampleVariant2, Guid, DateTime, int, long, bool>
{
    // implicit because SampleVariant1 ⊂ SampleVariant2
    public static implicit operator SampleVariant2(SampleVariant1 value)
        => value.Accept(SampleVariant1Converter.Instance);

    private sealed class SampleVariant1Converter : DefaultConverter<SampleVariant1Converter>, SampleVariant1.IFuncVisitor<SampleVariant2> { }
}
Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 is compatible. 
.NET Framework net461 was computed.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Additional computed target framework(s)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated
0.5.0 165,100 12/5/2022
0.4.0 423 11/30/2022
0.3.4 32,184 8/17/2022
0.3.3 844 6/19/2022
0.3.2 531 5/26/2022
0.3.1 533 5/19/2022
0.3.0 632 5/19/2022
0.2.0 589 5/17/2022
0.1.2 560 5/17/2022
0.1.1 539 5/16/2022
0.1.0 543 5/16/2022