EasySourceGenerators/EasySourceGenerators.Examples/PiExample.cs at main · dex3r/EasySourceGenerators · GitHub

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using EasySourceGenerators.Abstractions;
// ReSharper disable ConvertClosureToMethodGroup

namespace EasySourceGenerators.Examples;

public static partial class PiExample
{
    public static partial int GetPiDecimal(int decimalNumber);

    [GeneratesMethod(nameof(GetPiDecimal))]
    [SwitchCase(arg1: 0)]
    [SwitchCase(arg1: 1)]
    [SwitchCase(arg1: 2)]
    static int GetPiDecimal_Generator_Specialized(int decimalNumber) =>
        SlowMath.CalculatePiDecimal(decimalNumber);

    [GeneratesMethod(nameof(GetPiDecimal))]
    [SwitchDefault]
    static Func<int, int> GetPiDecimal_Generator_Fallback() => decimalNumber => SlowMath.CalculatePiDecimal(decimalNumber);
}

/*
 This will generate the following method:

    public static int GetPiDecimal(int decimalNumber)
    {
        switch (decimalNumber)
        {
            case 0: return 3;
            case 1: return 1;
            case 2: return 4;
            default: return CalculatePiDecimal(decimalNumber);
        }
    }
*/