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## Global s0

boost::xpressive::s0 — Sub-match placeholder, like $& in Perl.

## Synopsis

    // In header: <boost/xpressive/regex_primitives.hpp>

    mark_tag::proto_base_expr const s0;

| Copyright © 2007 Eric Niebler Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)