fitzchivalrik
commented
1 year ago For example, if Point is part of some module then the fields x and y would be private to the code that's external to the module.
Yeah, I was debating whether that should be mentioned explicitly, or if it would complicate things too much.
I decided to not mention it, because I thought it is the same for with; as in, the fields need to be accessible at call site to be able to use with:
using System;
public readonly record struct Point {
internal readonly int X {get; init;}
private readonly int Y {get; init;}
public Point(int x, int y) => (X,Y)=(x,y);
public override String ToString() => $"Point {{ X = {this.X}, Y= {this.Y} }}";
}
public class Program
{
public static void Main()
{
var pt = new Point(123, 456);
pt = pt with { X = 789 }; // Error if `X` is declared private above, or if `Main()` is in another project/module.
Console.WriteLine(pt.ToString()); // prints: Point { X = 789, Y = 456 }
}
}
atifaziz
microsoft-github-policy-service[bot]
When talking about the
withexpression in C#, mention the struct update syntax^1 as something similar in Rust.