#include <core.p4>

enum HashAlgorithm_t {
    CRC16
}

extern Polynomial<W> {
    Polynomial(W w);
}

extern Hash {
    Hash(HashAlgorithm_t algo);
    Hash(Polynomial<_> poly);
    bit<16> get<D>(in D data);
}

struct meta_t {
    bit<16> f0;
}

control ingress(inout meta_t meta) {
    Hash(Polynomial<bit<16>>(16w5678)) hash;
    apply {
        hash.get({meta.f0});
    }
}