Re: MPL pop_back problem

Tarjei Knapstad writes:

On Fri, 2003-05-16 at 18:44, David Abrahams wrote:

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Tarjei Knapstad writes:

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So, problem solved for now, but I'd still like to use pop_back and know why it failed...

list is like a singly-linked list at runtime: you can't do pop_back() because it's not an O(1) operation.

I see, but does that go for the other mpl containers as well? pop_back fails on all of list, vector, list_c, vector_c and range_c.

pop_back will work on vector[_c] soon. In fact, vector[_c] will probably be implemented as an alias to deque[_c] (coming soon) because there isn't enough savings in having a sequence that's only extensible at the front.

Can't say I see any good reason to supply an algorithm that's not working with any of the containers ;)

It's a temporary condition. Someone convinced Aleksey during the review period that vector ought to supply front- rather than back-extensibility, so that vector might be exchanged with list. We're not sure it was a good choice anymore ;-) HTH, -- Dave Abrahams Boost Consulting www.boost-consulting.com