.TH PCRE2_SET_CALLOUT 3 "21 March 2017" "PCRE2 10.30"
.SH NAME
PCRE2 - Perl-compatible regular expressions (revised API)
.SH SYNOPSIS
.rs
.sp
.B #include <pcre2.h>
.PP
.nf
.B int pcre2_set_callout(pcre2_match_context *\fImcontext\fP,
.B "  int (*\fIcallout_function\fP)(pcre2_callout_block *),"
.B "  void *\fIcallout_data\fP);"
.fi
.
.SH DESCRIPTION
.rs
.sp
This function sets the 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.
.P
There is a complete description of the PCRE2 native API in the
.\" HREF
\fBpcre2api\fP
.\"
page and a description of the POSIX API in the
.\" HREF
\fBpcre2posix\fP
.\"
page.