On Tue, May 16, 2017 at 3:24 PM, Nathan Sidwell <nathan@acm.org> wrote: > On 05/16/2017 03:20 PM, Tim Song wrote: > >> Also, operator bool() seems suspect. Consider the safe bool idiom? > > ? https://en.wikibooks.org/wiki/More_C%2B%2B_Idioms/Safe_bool I suspect that we don't want adding two ovl_iterators together to compile.