Suggestion: Make all structs immutable

[krzat]

If you really want, you can write constructor like this:

public Vector2f(float x = default(float), float y = default(float))
{
...
}
 

[Joki]

Because for you to use this syntax there is 2 requirements: what you are assigning is a property (not a plain old variable), and that the property can be assigned

This is plain wrong.

This works,

Code: [Select]

RenderStates r = new RenderStates { BlendMode = BlendMode.Add, Texture = new Texture(@"blah.png") };

while these being fields, NOT properties:

Code: [Select]

/// <summary>Blending mode</summary>
public BlendMode BlendMode;

/// <summary>Transform</summary>
public Transform Transform;

/// <summary>Texture</summary>
public Texture Texture;

/// <summary>Shader</summary>
public Shader Shader;


(and it won't if the struct is immutable as the property can't have a setter).

Of course it can. 

Code: [Select]

struct Foo
{
public Foo(int b)
{
boo = b;
}

private readonly int boo;
public int Boo
{
get { return boo; }
set { Console.WriteLine("I exist."); }
}
}


[krzat]

It won't work for immutable structs.

[Joki]

That's not what i said.

[krzat]

You kinda did before. Initializer syntax is not very useful for immutable struct, but you mentioned it.

[Joki]

Hm sorry, i didn't clarify it well.

Can initialization syntax be used to assign to something, that is not a property, but a regular field?
Yes, it can.

Is it usefull for immutable structs?
Sadly no.

You could still use reflection (either using Activator which is really slow, or compiled ExpressionTrees which is overkill) to assign to private fields without creating every possible constructor.