Provided by: libmongoc-doc_1.3.1-1_all 

NAME
mongoc_collection_keys_to_index_string() - This function shall returns the canonical stringification, as
used in mongoc_collection_create_index() without an explicit name, of a given key specification.
SYNOPSIS
char *
mongoc_collection_keys_to_index_string (const bson_t *keys);
PARAMETERS
keys A bson_t \&.
DESCRIPTION
This function shall returns the canonical stringification, as used in mongoc_collection_create_index(3)
without an explicit name, of a given key specification.
It is a programming error to call this function on a non‐standard index, such one other than a straight
index with ascending and descending.
RETURNS
A string that should be freed with bson_free(3) \&.
COLOPHON
This page is part of MongoDB C Driver. Please report any bugs at
https://jira.mongodb.org/browse/CDRIVER.
MongoDB C Driver 2016‐01‐18 MONGOC_COLLECTION_KEYS_TO_INDEX_STRING(3)