PCRE2 - Perl-compatible regular expressions (revised API) .rs #include <pcre2.h>

 void pcre2_match_data_free(pcre2_match_data *match_data); 

. .rs This function frees the memory occupied by a match data block, using the memory freeing function from the general context with which it was created, or free() if that was not set.

There is a complete description of the PCRE2 native API in the HREF
pcre2api
page and a description of the POSIX API in the HREF
pcre2posix
page.