How do I specify a variadic template constraint on all the whole tuple?
Atila Neves
atila.neves at gmail.com
Thu Jul 18 06:18:28 PDT 2013
http://stackoverflow.com/questions/17724479/in-d-how-do-i-specify-a-variadic-template-constraint-on-all-the-whole-tuple
Posted on stackoverflow first since I think it's better for the
language to get traction there. For completeness sake, posting
the text of the question here as well:
I'm writing 2 overloads of a function, both of them with variadic
template compile-time parameters. One should take symbols as the
templates, the other strings. I want to constrain the template
instantiation to these two cases. The best I came up with was
this:
bool func(SYMBOLS...)() if(!is(typeof(SYMBOLS[0]) == string)) {
}
and
bool func(STRINGS...)() if(is(typeof(STRINGS[0]) == string)) {
}
Obviously this only checks the first template parameter, and
while it works given the code I've written so far, I wish I could
say "only for all strings" and "only for not all strings". Is
there a way?
Thanks in advance.
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