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SYNOPSIS
#include <pcre2.h>
int pcre2_set_substitute_callout(pcre2_match_context *mcontext, void (*callout_function)(pcre2_substitute_callout_block *), void *callout_data);
This function sets the substitute callout fields in a match context (the first argument). The second argument specifies a callout function, and the third argument is an opaque data item that is passed to it. The result of this function 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.
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