Provided by: libbson-doc_1.30.2-1_all 

SYNOPSIS
#define BSON_APPEND_REGEX(b, key, val, opt) \
bson_append_regex (b, key, (int) strlen (key), val, opt)
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
Returns true if the operation was applied successfully. The function will fail if appending the regex
grows bson larger than INT32_MAX.
AUTHOR
MongoDB, Inc
COPYRIGHT
2009-present, MongoDB, Inc.
1.30.2 Mar 05, 2025 BSON_APPEND_REGEX(3)