In the fusion documents for algorithm pop-back, the example shows usage of pop_back as: assert(___pop_back__(make_vector <http://www.boost.org/doc/libs/1_50_0/libs/fusion/doc/html/fusion/container/generation/functions/make_vector.html>(1,2,3)) == make_vector <http://www.boost.org/doc/libs/1_50_0/libs/fusion/doc/html/fusion/container/generation/functions/make_vector.html>(1,2)); this should read: assert(pop_back(make_vector <http://www.boost.org/doc/libs/1_50_0/libs/fusion/doc/html/fusion/container/generation/functions/make_vector.html>(1,2,3)) == make_vector <http://www.boost.org/doc/libs/1_50_0/libs/fusion/doc/html/fusion/container/generation/functions/make_vector.html>(1,2)); link: http://www.boost.org/doc/libs/1_50_0/libs/fusion/doc/html/fusion/algorithm/t...