[#1BAB3433832A245AA83C1C72C7FD984F78E7E16F]
Returns true if this references an absolute path.
bool is_absolute() const noexcept;
Absolute paths always start with a forward slash ('/').
assert( url_view( "/path/to/file.txt" ).segments().is_absolute() == true );
Constant.
Throws nothing.