pcre2_convert_context_free (3) - Linux Man Pages
pcre2_convert_context_free: Perl-compatible regular expressions (revised API)
PCRE2 - Perl-compatible regular expressions (revised API)
void pcre2_convert_context_free(pcre2_convert_context *cvcontext);
This function is part of an experimental set of pattern conversion functions. It frees the memory occupied by a convert context, using the memory freeing function from the general context with which it was created, or free() if that was not set. If the argument is NULL, the function returns immediately without doing anything.
The pattern conversion functions are described in the pcre2convert documentation.