+Return to the PCRE2 index page. +
+
+This page is part of the PCRE2 HTML documentation. It was generated
+automatically from the original man page. If there is any nonsense in it,
+please consult the man page, in case the conversion went wrong.
+
+
+SYNOPSIS
+
+
+#include <pcre2.h> +
++int pcre2_set_compile_recursion_guard(pcre2_compile_context *ccontext, + int (*guard_function)(uint32_t, void *), void *user_data); +
++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. +
+Return to the PCRE2 index page. +