mpz_t * MPZ
INPUT
MPZ
if (sv_derived_from($arg, \"Math::GMP\")) {
IV tmp = SvIV((SV*)SvRV($arg));
$var = ($type) tmp;
}
else
croak(\"$var is not of type Math::GMP\")
OUTPUT
MPZ
sv_setref_pv($arg, \"Math::GMP\", (void*)$var);