DataType

    enum DataType {
        DT_FLOAT = 0,           // float type
        DT_FLOAT16 = 1,         // fp16 type
        DT_INT8 = 2,            // int8 type
        DT_INT16 = 6,     // int16 type
        DT_UINT16 = 7,      // uint16 type
        DT_UINT8 = 4,           // uint8 type
        DT_INT32 = 3,           //
        DT_INT64 = 9,           // int64 type
        DT_UINT32 = 8,          // unsigned int32
        DT_UINT64 = 10,          // unsigned int64
        DT_BOOL = 12,            // bool type
        DT_DOUBLE = 11,          // double type
        DT_STRING = 13,            // string type
        DT_DUAL_SUB_INT8 = 14,    /**< dual output int8 type */
        DT_DUAL_SUB_UINT8 = 15,    /**< dual output uint8 type */
        DT_COMPLEX64 = 16,         // complex64 type
        DT_COMPLEX128 = 17,        // complex128 type
        DT_QINT8 = 18,             // qint8 type
        DT_QINT16 = 19,            // qint16 type
        DT_QINT32 = 20,            // qint32 type
        DT_QUINT8 = 21,            // quint8 type
        DT_QUINT16 = 22,           // quint16 type
        DT_RESOURCE = 23,          // resource type
        DT_STRING_REF = 24,        // string ref type
        DT_DUAL = 25,              // dual output type
        DT_VARIANT = 26,           // dt_variant type
        DT_BF16 = 27,              // bf16 type
        DT_UNDEFINED = 28,         // Used to indicate a DataType field has not been set.
        DT_INT4 = 29,              // int4 type
        DT_MAX                     // Mark the boundaries of data types
    };