Added acquire_xxx() for generated code
fixed JSON decoding surrogated utf16 pair
Fixed a bug to decode JSON empty object.
change acquire_xxx() to safe_get_xxx()
fixed a bug for encoding non ASCII character in JSON string
Change the safe_get_xxx() to try_get_xxx()
Added FAST decoder v2
integer decode optimization
vector optimization
Added default value for required command line options
avoid unnecessary condition checking
avoid restoring previous value for const values.
Added encoding whether the previous value of a field is shared into the field meta properties.
inline generated accept member functions.
Change the static_visitor interface
Added encoder_v2