Man page - bson_append_regex(3)

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#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);

	•		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.

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. The function will fail if appending the regex grows bson larger than INT32_MAX.

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