1 files changed, 39 insertions, 0 deletions
diff --git a/boost/metaparse/v1/cpp11/impl/pop_back.hpp b/boost/metaparse/v1/cpp11/impl/pop_back.hpp
new file mode 100644
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+++ b/boost/metaparse/v1/cpp11/impl/pop_back.hpp
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+#ifndef BOOST_METAPARSE_V1_CPP11_IMPL_POP_BACK_HPP
+#define BOOST_METAPARSE_V1_CPP11_IMPL_POP_BACK_HPP
+
+// Copyright Abel Sinkovics (abel@sinkovics.hu)  2013.
+// 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)
+
+#include <boost/metaparse/v1/cpp11/fwd/string.hpp>
+#include <boost/metaparse/v1/cpp11/impl/push_front_c.hpp>
+#include <boost/metaparse/v1/cpp11/impl/size.hpp>
+
+#include <boost/mpl/clear.hpp>
+
+namespace boost
+{
+  namespace metaparse
+  {
+    namespace v1
+    {
+      namespace impl
+      {
+        template <class S>
+        struct pop_back;
+
+        template <char C>
+        struct pop_back<string<C>> : boost::mpl::clear<string<C>> {};
+
+        template <char C, char... Cs>
+        struct pop_back<string<C, Cs...>> :
+          push_front_c<typename pop_back<string<Cs...>>::type, C>
+        {};
+      }
+    }
+  }
+}
+
+#endif
+