Function ptrInputRange
Turn a Ref returning input range into a PTR one.
auto auto ptrInputRange(Range)
(
Range range
)
if (isRefInputRange!Range);
auto auto ptrInputRange(T)
(
T[] slice
);
This is useful for using ranges iterating @disable this(this) types with Phobos, that requires front to be
copyable in order to recognize a range as an input range.