richlander

using System;
using System.IO;
using System.Reflection;
using System.Runtime.InteropServices;
using static System.Console;

namespace versioninfo
{
    class Program
    {

richlander

static double ParseJson()
{
    const string json = " [ { \"name\": \"John\" }, [ \"425-000-1212\", 15 ], { \"grades\": [ 90, 80, 100, 75 ] } ]";

    double average = -1;

    using (JsonDocument doc = JsonDocument.Parse(json))
    {
        JsonElement root = doc.RootElement;
        JsonElement info = root[1];

richlander

public class ArrayBufferWriter : IBufferWriter<byte>, IDisposable
{
    private byte[] _rentedBuffer;
    private int _written;

    public ArrayBufferWriter(int initialCapacity)
    {
        // TODO: argument validation

        _rentedBuffer = ArrayPool<byte>.Shared.Rent(initialCapacity);

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static int WriteJson(IBufferWriter<byte> output, long[] extraData)
{
    var json = new Utf8JsonWriter(output, state: default);

    json.WriteStartObject();

    json.WriteNumber("age", 15, escape: false);
    json.WriteString("date", DateTime.Now);
    json.WriteString("first", "John");
    json.WriteString("last", "Smith");

richlander

Vector256<int> SoftwareFallback(int x)
{
    var result = Vector256<int>.Zero;
    ((int*)(&result))[0] = x;
    return result;
}

richlander

Vector256<short> SoftwareFallback(short x)
{
    var result = Vector256<short>.Zero;
    Unsafe.WriteUnaligned(ref Unsafe.As<Vector256<short>, byte>(ref result), value);
    return result;
}
// https://github.com/dotnet/coreclr/blob/57fd77e6f8f7f2c37cc5c3b36df3ea4f302e143b/src/System.Private.CoreLib/shared/System/Runtime/Intrinsics/Vector256.cs#L1303

richlander

Vector256<double> SoftwareFallback(double x)
{
    var pResult = stackalloc double[4]
    {
        x,
        x,
        x,
        x,
    };

richlander

Vector256<double> SoftwareFallback(double x)
{
    var pResult = stackalloc double[4]
    {
        x,
        x,
        x,
        x,
    };

richlander

static State ChangeState(State current, Transition transition, bool hasKey) =>
    (current, transition) switch
    {
        (Opened, Close)              => Closed,
        (Closed, Open)               => Opened,
        (Closed, Lock)   when hasKey => Locked,
        (Locked, Unlock) when hasKey => Closed,
        _ => throw new InvalidOperationException($"Invalid transition")
    };

richlander

static string Display(object o) => o switch
{
    Point { X: 0, Y: 0 }         => "origin",
    Point { X: var x, Y: var y } => $"({x}, {y})",
    _                            => "unknown"
};