typedef struct _mongoc_matcher_t mongoc_matcher_t;

mongoc_matcher_t does not currently support the full spectrum of query operations that the MongoDB server supports.

mongoc_matcher_t is deprecated and will be removed in version 2.0.

#include <bson/bson.h>
#include <mongoc/mongoc.h>
#include <stdio.h>
int
main (int argc, char *argv[])
{


   mongoc_matcher_t *matcher;


   bson_reader_t *reader;


   const bson_t *bson;


   bson_t *spec;


   char *str;


   int fd;


   mongoc_init ();
#ifdef _WIN32


   fd = fileno (stdin);
#else


   fd = STDIN_FILENO;
#endif


   reader = bson_reader_new_from_fd (fd, false);


   spec = BCON_NEW ("hello", "world");


   matcher = mongoc_matcher_new (spec, NULL);


   while ((bson = bson_reader_read (reader, NULL))) {


      if (mongoc_matcher_match (matcher, bson)) {


         str = bson_as_canonical_extended_json (bson, NULL);


         printf ("%s\n", str);


         bson_free (str);


      }


   }


   bson_reader_destroy (reader);


   bson_destroy (spec);


   mongoc_cleanup ();


   return 0;
}