Pool allocator does not perfect forward its arguments

[bertello.matteo@…]

The pool_allocator library has not been updated to C++11 yet. One of the greatest missing feature is the lack of perfect forwarding of the parameters of "conctruct" in pool_allocator and fast_pool_allocator. This prevent the move constructor of the allocated object to be called. Right now the construct implementation is as follow:

static void construct(const pointer ptr, const value_type & t)
{ new (ptr) T(t); }

while it should be:

template<typename ...Args>
static void construct(const pointer ptr, Args&& ...args)
{ new (ptr) T(std::forward<Args> (args)...); }

[malcolm.parsons@…]

See ​https://github.com/boostorg/pool/pull/8