github/doc/pcre2_substring_number_from_name.3

.TH PCRE2_SUBSTRING_NUMBER_FROM_NAME 3 "21 October 2014" "PCRE2 10.00"
.SH NAME
PCRE2 - Perl-compatible regular expressions (revised API)
.SH SYNOPSIS
.rs
.sp
.B #include <pcre2.h>
.PP
.nf
.B int pcre2_substring_number_from_name(const pcre2_code *\fIcode\fP,
.B "  PCRE2_SPTR \fIname\fP);"
.fi
.
.SH DESCRIPTION
.rs
.sp
This convenience function finds the number of a named substring capturing
parenthesis in a compiled pattern, provided that it is a unique name. The
function arguments are:
.sp
  \fIcode\fP    Compiled regular expression
  \fIname\fP    Name whose number is required
.sp
The yield of the function is the number of the parenthesis if the name is
found, or PCRE2_ERROR_NOSUBSTRING if it is not found. When duplicate names are
allowed (PCRE2_DUPNAMES is set), if the name is not unique,
PCRE2_ERROR_NOUNIQUESUBSTRING is returned. You can obtain the list of numbers
with the same name by calling \fBpcre2_substring_nametable_scan()\fP.
.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.