"David M. Jones" <djones@keymark.com> writes:
Are you telling me that this STL implementation is (slightly) invalid? Or are you telling me that I should not expect boost::shared_ptr to be a valid type for use as a custom allocator::pointer?
It is the latter. STL implementations are permitted to assume that an allocator for a type T have pointer and reference types T* and T& respectively. 20.1.5 4 Implementations of containers described in this International Standard are permitted to assume that their Allocator template parameter meets the following two additional requirements beyond those in Table 32. --- All instances of a given allocator type are required to be interchangeable and always compare equal to each other. --- The typedef members pointer, const_pointer, size_type, and difference_type are required to be T*, T const*, size_t, and ptrdiff_t, respectively. This is sometimes known among committee members as "the weasel wording." -- Dave Abrahams Boost Consulting http://www.boost-consulting.com