Daily bit(e) of C++ | Heterogenous lookup in ordered containers
Daily bit(e) of C++ #403, C++14 support for heterogenous lookup in ordered containers.
Before C++14, looking up elements in an ordered container was only possible using the type matching the key.
Because of this, lookups using a non-matching type required conversion and construction of a temporary key.
Notably, for std::string, this typically also means an allocation.
