Re: [Boost-users] transform_iterator causing strange problems

Mathias Gaunard wrote:

Lindley M French wrote:

...

Okay, that makes sense as a cause, anyway. I'm not clear on how to fix it.

Well, given the cause is temporaries due to implicit conversions, just don't make those implicit conversions.

just change const Group& operator()(const std::pair &p) const

to const Group& operator()(const std::pair &p) const

The fact that the value of a map iterator does not exactly resemble the declaration of the map itself (implicit 'const' on the key) has bitten me more often than I care to admit. I've been trying to cultivate the habit of always using my_map_typedef::value_type whenever the std::pair in question comes from a map. So: const Group& operator()(const OP_map_typedef::value_type& p) const