val bin_size_t : t Bin_prot.Size.sizerval bin_write_t : t Bin_prot.Write.writerval bin_read_t : t Bin_prot.Read.readerval __bin_read_t__ : (int ‑> t) Bin_prot.Read.readerThis function only needs implementation if t exposed to be a polymorphic variant.
Despite what the type reads, this does *not* produce a function after reading;
instead it takes the constructor tag (int) before reading and reads the rest of the
variant t afterwards.