15 Jun
2007
15 Jun
'07
2:59 p.m.
Eric Niebler wrote:
Tobias Schwinger wrote:
Tobias Schwinger wrote:
// [...] tricky nullary case with default ctor detection // omitted for simplicity
Doh! It's not possible to detect default constructibility, correct?
So we'd have to declare it as
template<typename T, typename DefaultConstructible = mpl::false_> struct constructor;
No. If the interface is "construct<T>(sequence)", then you can dispatch on the size of the sequence. You'd only try to default construct when you pass an empty sequence.
Why is there a need to detect a default constructor?