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PCRE2_SUB...H_BYNUMBER(3)  Library Functions Manual  PCRE2_SUB...H_BYNUMBER(3)

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 er-
       ror  code  otherwise. After a partial match, only substring 0 is	avail-
       able.

       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 10.45		       22 December 2014	     PCRE2_SUB...H_BYNUMBER(3)

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