Function isHighSurrogate

lib/cpp/src/thrift/protocol/TJSONProtocol.cpp:294–296

Return true if the code unit is high surrogate

// Return true if the code unit is high surrogate
static bool isHighSurrogate(uint16_t val) {
  return val >= 0xD800 && val <= 0xDBFF;
}

// Return true if the code unit is low surrogate
static bool isLowSurrogate(uint16_t val) {