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| Posted by Philippe Sigaud | PermalinkReply |
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Philippe Sigaud
| On Mon, Sep 26, 2011 at 21:40, Andrej Mitrovic <andrej.mitrovich@gmail.com> wrote:
> Actually now that I think about it, isOneOf!() is more to my liking. isImplicitlyConvertible allows too much, e.g. implicit casting of unsigned to signed. Even though that might be perfectly valid, I want to optionally allow a warning via a version switch. So I'll be using isOneOf.
In any case, concerning your initial question, a possibility is to curry the template:
template isCompatible(T)
{
enum isCompatible = allSatisfy!(isIC!T, MyTypes);
}
template isIC(First)
{
template isIC(Second)
{
enum isIC = isImplicitlyConvertible!(First, Second);
}
}
So, isIC!T yields *another* template (also named isIC), that will accept one type and be mapped on MyTypes by allSatisfy. What's cool is that the second-level template remembers First. It's a bit like a closure, but on types.
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