On Monday 20 July 2015 18:25:43 Keith Gardner wrote: > > What's the difference in std::vector between an rvalue push_back and > > emplace_back? > > emplace_back takes variadic template arguments to construct the item > directly in the vector instead of creating a temporary and then performing > a move operation. If the template argument is just an rvalue of the > container type, it will perform just like the rvalue push_back function. > > http://en.cppreference.com/w/cpp/container/vector/emplace_back
Aside from the variadic and the templateness, what's the difference? The templateness changes how a type different than the vector's type gets constructed (it might undergo a conversion first). But assuming I am pushing back a T, is there any reason I'd want emplace_back? Or vice-versa? -- Thiago Macieira - thiago.macieira (AT) intel.com Software Architect - Intel Open Source Technology Center _______________________________________________ Development mailing list [email protected] http://lists.qt-project.org/mailman/listinfo/development
