TYPEMAP
pairing_t * PAIRINGT
element_t * ELEMENTT
mpz_t     *	MPZ

INPUT
PAIRINGT
        if (sv_derived_from($arg, \"Crypt::PBC::Pairing\")) {
            IV tmp = SvIV((SV*)SvRV($arg));
            $var = ($type) tmp;
        }
        else
            croak(\"$var is not of type Crypt::PBC::Pairing\")

ELEMENTT
        if (sv_derived_from($arg, \"Crypt::PBC::Element\")) {
            IV tmp = SvIV((SV*)SvRV($arg));
            $var = ($type) tmp;
        }
        else
            croak(\"$var is not of type Crypt::PBC::Element\")

MPZ
        /* this was cut and pasted directly from Math::BigInt::GMP -- the rest are obvious copies */
        if (sv_derived_from($arg, \"Math::BigInt::GMP\")) {
            IV tmp = SvIV((SV*)SvRV($arg));
            $var = ($type) tmp;
        }
        else
            croak(\"$var is not of type Math::BigInt::GMP\")

OUTPUT
PAIRINGT
	sv_setref_pv($arg, \"Crypt::PBC::Pairing\", (void*)$var);

ELEMENTT
	sv_setref_pv($arg, \"Crypt::PBC::Element\", (void*)$var);

MPZ
    /* this was cut and pasted directly from Math::BigInt::GMP -- the rest are obvious copies */
	sv_setref_pv($arg, \"Math::BigInt::GMP\", (void*)$var);