Matt Calabrese <rivorus@gmail.com> writes:
As much as I love MPL, I have come across a couple more problems. First, on MSVC++ 7.1, "count" returns 0 with maps, when there is an element in the map with the specified key
That behavior matches the specified semantics of "count" perfectly: http://www.boost.org/libs/mpl/doc/refmanual/count.html Elements of a map are pairs.
(and probably on other compilers as well, though I haven't checked the implementation). As well, while a 3-argument form of "at" is described in documentation (where the third argument is the default type returned by "at" if an element with the provided key does not exist in the container), it does not appear to be implemented in 1.33.
You're right. Aleksey? -- Dave Abrahams Boost Consulting www.boost-consulting.com