Method swap

externals/picojson/picojson.h:346–349

}
#endif
inline void value::swap(value &x) PICOJSON_NOEXCEPT {
  std::swap(type_, x.type_);
  std::swap(u_, x.u_);
}

#define IS(ctype, jtype)                                                                                                           \
  template <> inline bool value::is<ctype>() const {                                                                               \