pcre_get_stringnumber man page on FreeBSD

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PCRE_GET_STRINGNUMBER(3)			      PCRE_GET_STRINGNUMBER(3)

NAME
       PCRE - Perl-compatible regular expressions

SYNOPSIS

       #include <pcre.h>

       int pcre_get_stringnumber(const pcre *code,
	    const char *name);

DESCRIPTION

       This convenience function finds the number of a named substring capturā€
       ing parenthesis in a compiled pattern. Its arguments are:

	 code	 Compiled regular expression
	 name	 Name whose number is required

       The yield of the function is the number of the parenthesis if the  name
       is found, or PCRE_ERROR_NOSUBSTRING otherwise. When duplicate names are
       allowed (PCRE_DUPNAMES is set), it is not defined which of the  numbers
       is  returned  by	 pcre_get_stringnumber().  You can obtain the complete
       list by calling pcre_get_stringtable_entries().

       There is a complete description of the PCRE native API in  the  pcreapi
       page and a description of the POSIX API in the pcreposix page.

						      PCRE_GET_STRINGNUMBER(3)
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