Advances @iter and retrieves the next attribute/value. %FALSE is returned if
an error has occurred (in which case @error is set), or if the end of the
iteration is reached (in which case @attribute and @value are set to %NULL
and the iterator becomes invalid). If %TRUE is returned,
g_uri_params_iter_next() may be called again to receive another
attribute/value pair.
Note that the same @attribute may be returned multiple times, since URIs
allow repeated attributes.
Advances @iter and retrieves the next attribute/value. %FALSE is returned if an error has occurred (in which case @error is set), or if the end of the iteration is reached (in which case @attribute and @value are set to %NULL and the iterator becomes invalid). If %TRUE is returned, g_uri_params_iter_next() may be called again to receive another attribute/value pair.
Note that the same @attribute may be returned multiple times, since URIs allow repeated attributes.