ReadonlyCORDThe option [ctype=CORD] may be applied to a non-repeated field of type "bytes". It indicates that in C++, the data should be stored in a Cord instead of a string. For very large strings, this may reduce memory fragmentation. It may also allow better performance when parsing from a Cord, or when parsing with aliasing enabled, as the parsed Cord may then alias the original buffer.
ReadonlySTRINGDefault mode.
ReadonlySTRING_Represents the STRING_PIECE protobuf enum value.
Defines the static values of FieldOptions_CType.