[Vala] delegates in vala

[Albert Hopkins <marduk letterboxes org>]

Some background: I'm currently learning vala by way of C#.  Basically
I'm learning C# and "translating" what I learn to vala.

So I've come across delegates.  From the C# book I'm reading they give
the example that looks basically like this:

    MyDel del;
    ...
    del = randValue < 50 ? new MyDel(program.PrintLow) : new
    MyDel(program.PrintHigh);

Using the "Vala for C# Programmers"[1] guide I've translated this to:

    MyDel del;
    ...
    del = randValue > 50 ? program.PrintLow : program.PrintHigh;

However this gives me a compile error:

delegate.vala:21.32-21.47: error: Assignment: Cannot convert from
`Program.PrintLow' to `Program.PrintLow'
        del = randValue < 50 ? program.PrintLow : program.PrintHigh;
                               ^^^^^^^^^^^^^^^^
delegate.vala:21.51-21.67: error: Assignment: Cannot convert from
`Program.PrintHigh' to `Program.PrintHigh'
        del = randValue < 50 ? program.PrintLow : program.PrintHigh;
                                                  ^^^^^^^^^^^^^^^^^
delegate.vala:21.15-21.28: error: Incompatible expressions
        del = randValue < 50 ? program.PrintLow : program.PrintHigh;
              ^^^^^^^^^^^^^^
Compilation failed: 3 error(s), 0 warning(s)

However a simple assignment works:

    del = program.PrintLow;

So is the problem with the ternary expression?  I also tried putting the
conditional expression in parens but that didn't make any difference.

Using Vala 0.18.1

[1] https://live.gnome.org/Vala/ValaForCSharpProgrammers