This needs to be moved to dotnet/roslyn repository. The enum source code is currently lacking triple slash doc comments.

A small correction: you probably meant PointerMemberAccessExpression. To answer your question, this represents the arrow expression (->).

Taking the example of the doc:

public struct Coords
{
    public int X;
    public int Y;
    public override string ToString() => $"({X}, {Y})";
}

public class PointerMemberAccessExample
{
    public static unsafe void Main()
    {
        Coords coords;
        Coords* p = &coords;
        p->X = 3;
        p->Y = 4;
        Console.WriteLine(p->ToString());  // output: (3, 4)
    }
}

Here is the SyntaxTree of the relevant part:

ping @sharwell Should this move to the roslyn repo?

@BillWagner I'm not sure. It seems reasonable for it to live in either location.

This was accidentally closed. We documented a bunch of SyntaxKinds but haven't reached the particular member mentioned here.