Verify tuple is a tuple of class objects?
Stewart Gordon
smjg_1998 at yahoo.com
Fri Feb 18 18:27:36 PST 2011
On 18/02/2011 21:22, Steven Schveighoffer wrote:
<snip>
> template VerifyTuple(Types...)
> {
> static if(Types.length == 0)
> enum bool VerifyTuple = true;
> else
> enum bool VerifyTuple == is(Type : Object) && VerifyTuple!(Types[1..$]);
<snip>
You have two typos there. Corrected version:
enum bool VerifyTuple = is(Types[0] : Object) && VerifyTuple!(Types[1..$]);
But perhaps even nicer:
----------
template VerifyTuple() {
enum bool VerifyTuple = true;
}
template VerifyTuple(T, Ypes...) {
enum bool VerifyTuple = is(T : Object) && VerifyTuple!(Ypes);
}
----------
(Some of you will be able to guess what other language I've programmed in in my time from
this.)
Stewart.
More information about the Digitalmars-d-learn
mailing list