path weakly_canonical(const path& p);
path weakly_canonical(const path& p, error_code& ec);
Effects: Using status(p) or status(p, ec), respectively, to determine existence, return a path composed by operator/= from the result of calling canonical() without a base argument and with a path argument composed of the leading elements of p that exist, if any, followed by the elements of p that do not exist, if any. For the first form, canonical() is called without an error_code argument. For the second form, canonical() is called with ec as an error_code argument, and path() is returned at the first error occurrence, if any.
Remarks: Implementations are encouraged to avoid unnecessary normalization such as when canonical has already been called on the entirety of p.