lib(eplex). The previous lib(eplex), which
loads eplex with the range bounds keeper, can still for the moment be
loaded with lib(range_eplex), and the IC variant can still be loaded
with lib(ic_eplex). However, we strongly recommend that users move
to using standalone eplex, as we plan to phase out the older variants.
There are some differences at the source level between standalone and the older non-standalone eplex. This chapter outlines these differences to help users to port their existing code to standalone eplex.