Parameterless constructor on struct not supported in C# 6

Question

I have a struct with a parameterless constructor:

struct Coordinate
{
    public Coordinate() : this(4, 5, 6)
    {

    }
    public Coordinate(float x, float y, float z)
    {
        X = x;
        Y = y;
        Z = z;
    }

    public float X { get; private set; }
    public float Y { get; private set; }
    public float Z { get; private set; }
}

I have the languate property in the project properties set to C#, but an still getting a compile error.

Error CS0568 Structs cannot contain explicit parameterless constructors

It has been discussed as a potential C# 6.0 feature, but didn't make it. — Ivan Stoev, Mar 19 '17 at 15:37
@IvanStoev I had read that, but also saw it on [MSDN([https://msdn.microsoft.com/en-gb/magazine/dn879355.aspx). OK, that clears that up then. It did sound confusing. — BanksySan, Mar 19 '17 at 15:40
@JLRishe I did, that being why I was getting the error. Ivan has cleared it up though. — BanksySan, Mar 19 '17 at 15:41
@IvanStoev Do you want to stick that as an answer and I'll tick it? — BanksySan, Mar 19 '17 at 15:41
See this question discussing the same: http://stackoverflow.com/questions/31063109/parameterless-constructors-in-structs-for-c-sharp-6 — Phylyp, Mar 19 '17 at 15:43
@BanksySan No, I can't find official documentation, and too lazy to search Roslyn repository to find when Mads Torgensen (or someone else from dev team) said it will not be included. — Ivan Stoev, Mar 19 '17 at 15:45
@Phylyp Thanks for the link, I guess we could simply close this a dupe. — Ivan Stoev, Mar 19 '17 at 15:47

score 1 · Answer 1 · answered Mar 19 '17 at 15:40

1

Sadly C# won't allow defining parameterless constructors. A workaround for it would be to define a default value, as a property.

public static Coordinate defaultValue { get { return new Coordinate (7, 6, 3); } }

answered Mar 19 '17 at 15:40

dwycxt

41
5

Parameterless constructor on struct not supported in C# 6

1 Answers1