NAME

       bson_append_undefined()  - The bson_append_undefined() function shall append a new element
       to bson of type BSON_TYPE_UNDEFINED. Undefined is  common  in  Javascript.  However,  this
       element type is deprecated and should not be used in new code.

SYNOPSIS

       bool
       bson_append_undefined (bson_t     *bson,
                              const char *key,
                              int         key_length);

PARAMETERS

       bson   A bson_t \&.

       key    An ASCII C string containing the name of the field.

       key_length
              The length of key in bytes, or ‐1 to determine the length with strlen(3) \&.

DESCRIPTION

       The  bson_append_undefined(3)  function  shall  append  a  new  element  to  bson  of type
       BSON_TYPE_UNDEFINED. Undefined is common in Javascript.  However,  this  element  type  is
       deprecated and should not be used in new code.

RETURNS

       true  if  the  operation  was  applied  successfully,  otherwise  false and bson should be
       discarded.

COLOPHON

       This    page    is    part    of    libbson.     Please     report     any     bugs     at
       https://jira.mongodb.org/browse/CDRIVER.