PCRE2_SET_COMPILE_RECURSION_GUARD(3)          FreeBSD Library Functions Manual

NAME
       PCRE2 - Perl-compatible regular expressions (revised API)

SYNOPSIS
       #include <pcre2.h>

       int pcre2_set_compile_recursion_guard(pcre2_compile_context *ccontext,
         int (*guard_function)(uint32_t, void *), void *user_data);)(uint32_t, void *), void *user_data);

DESCRIPTION
       This function defines, within a compile context, a function that is
       called whenever pcre2_compile() starts to compile a parenthesized part
       of a pattern. The first argument to the function gives the current
       depth of parenthesis nesting, and the second is user data that is
       supplied when the function is set up. The callout function should
       return zero if all is well, or non-zero to force an error. This feature
       is provided so that applications can check the available system stack
       space, in order to avoid running out. The result of
       pcre2_set_compile_recursion_guard() is always zero.

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

PCRE2 10.00                     22 October 2014
                                          PCRE2_SET_COMPILE_RECURSION_GUARD(3)