[fs.op.canonical](https://github.com/cplusplus/draft/blob/master/source/iostreams.tex#L13796-L13799) says it is equivalent to "absolute(p, base).", but absolute no longer takes a base argument as of p0492r2 More likely to be editorial, absolute still has a base argument in the synopsis of [fs.filesystem.syn], though it doesn't have it in [fs.op.absolute]