Provided by: libbson-doc_1.16.1-1build2_all 

NAME
bson_iter_key_len - bson_iter_key_len()
SYNOPSIS
uint32_t bson_iter_key_len (const bson_iter_t *iter);
PARAMETERS
• iter: A bson_iter_t.
DESCRIPTION
Fetches the length of the key for the current element observed by iter. This is a constant time computation, and therefore faster than calling strlen() on a key returned by bson_iter_key().
SEE ALSO
bson_iter_key() to retrieve current key.
RETURNS
An integer representing the key length.
AUTHOR
MongoDB, Inc
COPYRIGHT
2017-present, MongoDB, Inc 1.16.1 Mar 03, 2020 BSON_ITER_KEY_LEN(3)