DataStream.WriteRange requirements.

[Gavin-Williams]

Trying to use the following...

public class TextureWriter<T> where T : struct { ... dataStream.WriteRange<T>(data);

But I'm getting 'CS8377 Type T must be non-nullable.'

Is there something unusual about this method or is there a secret package that needs to be referenced to make T work here?

[amerkoleci]

T need to be unmanaged type or struct, not class.

[Gavin-Williams]

`public class TextureWriter where T : struct'

Doesn't that provide the proper constraint? This code works in SharpDX.

[amerkoleci]

Make where T : unmanaged

[Gavin-Williams]

That removes the error.

[Gavin-Williams]

So unmanaged is similar to struct, but it enforces a stricter requirement that the struct cannot have any referenced data. It must be pure value type. That makes sense.

But then, how did SharpDX accept struct as the constraint?

Is it just the case that unmanaged wasn't used or even available with SharpDX and unmanaged provides the true intention of the constraint?

[amerkoleci]

Unmanaged makes sure your struct type is fully blittable and interop capable