using System;

namespace RecordTypes

{

/// <summary>

/// Record types

/// https://docs.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-9#record-types

/// https://www.thomasclaudiushuber.com/2020/09/01/c-9-0-records-work-with-immutable-data-classes/

/// https://github.com/dotnet/csharplang/blob/master/proposals/csharp-9.0/records.md

/// https://github.com/dotnet/csharplang/issues/2850

/// </summary>

class Program

{

static void Main(string[] args)

{

var friend = new Friend("İbrahim", "ATAY");

Console.WriteLine(friend.FirstName); // İbrahim

var (first, last) = friend; // deconstruct

Console.WriteLine(first); // İbrahim

Console.WriteLine(last); // ATAY

var person = new Person() { FirstName = "İbrahim", LastName = "ATAY" };

Console.WriteLine(person);

var sister = person with { FirstName = "Fulya" };

Console.WriteLine($"Sister: {sister}");

// https://stackoverflow.com/questions/63994473/how-to-copy-clone-records-in-c-sharp-9

var sister2 = sister with { }; // copy/clone records

Console.WriteLine($"Clone to Sister: {sister2}");

Console.WriteLine($"Sister == Clone Sisiter => {sister == sister2}");

var weight1 = new Weight(1);

var weight2 = new Weight(1.001);

Console.WriteLine($"{weight1} == {weight2} => {weight1 == weight2}");

Console.ReadLine();

}

public record Weight(double value);

public record Friend(string FirstName, string LastName);

public record Person

{

public string FirstName { get; init; }

public string LastName { get; init; }

}

public record Developer : Person

{

public string FavoriteLanguage { get; init; }

}

}

}