Assignment of tuples

[Russel Winder]

So I have an enum:

   enum RC5Command: Tuple!(ubyte, ubyte) {
       Standby = tuple(to!ubyte(0x10), to!ubyte(0x0c)),
       …

I can do:

   RC5Command rc5command = RC5Command.CD;

However, if I do:

   rc5command = RC5Command.BD;

I get:

source/functionality.d(80,16): Error: template std.typecons.Tuple!(ubyte, ubyte).Tuple.opAssign cannot deduce function from argument types !()(RC5Command), candidates are:
/usr/lib/ldc/x86_64-linux-gnu/include/d/std/typecons.d(900,19):        opAssign(R)(auto ref R rhs)
  with R = RC5Command
  must satisfy the following constraint:
       areCompatibleTuples!(typeof(this), R, "=")

which is totally unreasonable. And yet D insists. I guess there is an
explanation, but mostly this seems like a bug.

-- 
Russel.
===========================================
Dr Russel Winder      t: +44 20 7585 2200
41 Buckmaster Road    m: +44 7770 465 077
London SW11 1EN, UK   w: www.russel.org.uk

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