1 files changed, 44 insertions, 0 deletions
diff --git a/boost/metaparse/v1/impl/empty_string.hpp b/boost/metaparse/v1/impl/empty_string.hpp
new file mode 100644
index 0000000000..7b62496450
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+++ b/boost/metaparse/v1/impl/empty_string.hpp
@@ -0,0 +1,44 @@
+#ifndef BOOST_METAPARSE_V1_IMPL_EMPTY_STRING_HPP
+#define BOOST_METAPARSE_V1_IMPL_EMPTY_STRING_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/config.hpp>
+
+namespace boost
+{
+  namespace metaparse
+  {
+    namespace v1
+    {
+      namespace impl
+      {
+        template <class Ignore = int>
+        struct empty_string
+        {
+          typedef empty_string type;
+
+          #ifdef BOOST_NO_CONSTEXPR_C_STR
+            static const char value[1];
+          #else
+            static constexpr char value[1] = {0};
+          #endif
+        };
+
+        #ifdef BOOST_NO_CONSTEXPR_C_STR
+          template <class Ignore>
+          const char empty_string<Ignore>::value[1] = {0};
+        #else
+          template <class Ignore>
+          constexpr char empty_string<Ignore>::value[1];
+        #endif
+      }
+    }
+  }
+}
+
+#endif
+