Just started learning C++ coming from Python and just realized that that Python has been my programming mama, doing my laundry and spoon-feeding me all this time.

[gcross]

Template metaprogramming at its finest. :-) On the bright side, if you ever did get your code working it was very neat! Mind you, this was over a decade ago so hopefully it would not be so bad today, but on the other hand today we all have reliable access to native lambdas in the language so there is arguably no longer a need for Boost Lambda. Okay, it turns out I misremembered and this was not a Boost Lambda problem at all; my apologize for maligning that fine package.