bson_append_regex()
Synopsis
bool
bson_append_regex (bson_t     *bson,
                   const char *key,
                   int         key_length,
                   const char *regex,
                   const char *options);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(). | 
| regex | An ASCII string containing the regex. | 
| options | An optional string containing the regex options as a string. | 
Description
Appends a new field to bson of type BSON_TYPE_REGEX. regex should be the regex string. options should contain the options for the regex.
Valid characters for options include:
- 'i' for case-insensitive. 
- 'm' for multiple matching. 
- 'x' for verbose mode. 
- 'l' to make \w and \W locale dependent. 
- 's' for dotall mode ('.' matches everything) 
- 'u' to make \w and \W match unicode. 
Returns
true if the operation was applied successfully, otherwise false and bson should be discarded.