NAME

       PCRE2 - Perl-compatible regular expressions (revised API)

SYNOPSIS

       #include <pcre2.h>

       int pcre2_substring_length_bynumber(pcre2_match_data *match_data,
         uint32_t number, PCRE2_SIZE *length);

DESCRIPTION

       This function returns the length of a matched substring, identified by number.  The arguments are:

         match_data   The match data block for the match
         number       The substring number
         length       Where to return the length, or NULL

       The third argument may be NULL if all you want to know is whether or not a substring is set. The yield is
       zero  on  success,  or  a  negative  error  code  otherwise.  After  a partial match, only substring 0 is
       available.

       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 December 2014              PCRE2_SUBSTRING_LENGTH_BYNUMBER(3)