Method ParseEnumFromString

native/thirdpart/flatbuffers/idl_parser.cpp:1733–1763

}

CheckedError Parser::ParseEnumFromString(const Type &type,
                                         std::string *result) {
  const auto base_type =
      type.enum_def ? type.enum_def->underlying_type.base_type : type.base_type;
  if (!IsInteger(base_type)) return Error("not a valid value for this field");
  uint64_t u64 = 0;
  for (size_t pos = 0; pos != std::string::npos;) {
    const auto delim = attribute_.find_first_of(' ', pos);
    const auto last = (std::string::npos == delim);
    auto word = attribute_.substr(pos, !last ? delim - pos : std::string::npos);
    pos = !last ? delim + 1 : std::string::npos;
    const EnumVal *ev = nullptr;
    if (type.enum_def) {
      ev = type.enum_def->Lookup(word);
    } else {
      auto dot = word.find_first_of('.');
      if (std::string::npos == dot)
        return Error("enum values need to be qualified by an enum type");
      auto enum_def_str = word.substr(0, dot);
      const auto enum_def = LookupEnum(enum_def_str);
      if (!enum_def) return Error("unknown enum: " + enum_def_str);
      auto enum_val_str = word.substr(dot + 1);
      ev = enum_def->Lookup(enum_val_str);
    }
    if (!ev) return Error("unknown enum value: " + word);
    u64 |= ev->GetAsUInt64();
  }
  *result = IsUnsigned(base_type) ? NumToString(u64)
                                  : NumToString(static_cast<int64_t>(u64));
  return NoError();
}

CheckedError Parser::ParseHash(Value &e, FieldDef *field) {
  FLATBUFFERS_ASSERT(field);