Decode the specified object of parameterized TYPE from the input source specified by a previous call to open and leave the reader in an open state. Return 0 on success, and a non‐zero value otherwise. A compilation error will result unless TYPE conforms to the requirements of a bdlat sequence or choice, as described in bdlat_sequencefunctions and bdlat_choicefunctions. The behavior is undefined unless this call was preceded by a prior successful call to open