basic implementation for int64_type
basic implementation for int64_type

turenar/picojson,kazuho/picojson,karya0/picojson,karya0/picojson,Banchi0123/picojson,pfultz2/picojson,Banchi0123/picojson,kazuho/picojson,turenar/picojson,pfultz2/picojson