well, the ABI doc says: We have not attempted to constrain the interface [of the standard library] at this level, because we do not consider doing so feasi

well, the ABI doc says: We have not attempted to constrain the interface [of the standard library] at this level, because we do not consider doing so feasible at this time So it wasn't necessarily out of scope, it was just hard to do. I think the reason they don't consider it feasible, is because the C++ ABI would constrain the implementation significantly and there was too much divergence already.