Set the path.
This function sets the path to the string, which may be empty. Reserved characters in the string are percent-escaped in the result.
The library may adjust the final result to ensure that no other parts of the url is semantically affected.
This function does not encode '/' chars, which are unreserved for paths but reserved for path segments. If a path segment should include encoded '/'s to differentiate it from path separators, the functions set_encoded_path or segments should be used instead.
url u( "http://www.example.com" );
u.set_path( "path/to/file.txt" );
assert( u.path() == "/path/to/file.txt" );
Linear in `this->size() + s.size()`.
Strong guarantee. Calls to allocate may throw.
path = path-abempty ; begins with "/" or is empty
/ path-absolute ; begins with "/" but not "//"
/ path-noscheme ; begins with a non-colon segment
/ path-rootless ; begins with a segment
/ path-empty ; zero characters
path-abempty = *( "/" segment )
path-absolute = "/" [ segment-nz *( "/" segment ) ]
path-noscheme = segment-nz-nc *( "/" segment )
path-rootless = segment-nz *( "/" segment )
path-empty = 0