1PCRE2_COMPILE(3)           Library Functions Manual           PCRE2_COMPILE(3)
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NAME

6       PCRE2 - Perl-compatible regular expressions (revised API)
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SYNOPSIS

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10       #include <pcre2.h>
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12       int pcre2_callout_enumerate(const pcre2_code *code,
13         int (*callback)(pcre2_callout_enumerate_block *, void *),
14         void *callout_data);
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DESCRIPTION

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18       This  function  scans a compiled regular expression and calls the call‐
19       back() function for each callout within the pattern. The yield  of  the
20       function is zero for success and non-zero otherwise. The arguments are:
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22         code           Points to the compiled pattern
23         callback       The callback function
24         callout_data   User data that is passed to the callback
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26       The  callback() function is passed a pointer to a data block containing
27       the following fields:
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29         version                Block version number
30         pattern_position       Offset to next item in pattern
31         next_item_length       Length of next item in pattern
32         callout_number         Number for numbered callouts
33         callout_string_offset  Offset to string within pattern
34         callout_string_length  Length of callout string
35         callout_string         Points to callout string or is NULL
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37       The second argument is the callout data that was passed to  pcre2_call‐
38       out_enumerate().  The callback() function must return zero for success.
39       Any other value causes the pattern scan to stop, with the  value  being
40       passed back as the result of pcre2_callout_enumerate().
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42       There is a complete description of the PCRE2 native API in the pcre2api
43       page and a description of the POSIX API in the pcre2posix page.
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47PCRE2 10.20                      23 March 2015                PCRE2_COMPILE(3)
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