stabilize build system: depends, installer, boost/bdb fixes, cross targets groundwork

2026-02-24 18:38:47 +00:00
parent da8c28aaeb
commit 65cb2619a7
13106 changed files with 2484322 additions and 1804 deletions
@@ -0,0 +1,59 @@
+#ifndef BOOST_METAPARSE_V1_ACCEPT_WHEN_HPP
+#define BOOST_METAPARSE_V1_ACCEPT_WHEN_HPP
+
+// Copyright Abel Sinkovics (abel@sinkovics.hu)  2009 - 2010.
+// 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/get_result.hpp>
+#include <boost/metaparse/v1/reject.hpp>
+#include <boost/metaparse/v1/is_error.hpp>
+
+#include <boost/mpl/if.hpp>
+#include <boost/mpl/eval_if.hpp>
+
+namespace boost
+{
+  namespace metaparse
+  {
+    namespace v1
+    {
+      template <class P, class Pred, class Msg>
+      struct accept_when
+      {
+      private:
+        struct unchecked
+        {
+          template <class S, class Pos>
+          struct apply :
+            boost::mpl::eval_if<
+              typename Pred::template apply<
+                typename get_result<typename P::template apply<S, Pos> >::type
+              >::type,
+              typename P::template apply<S, Pos>,
+              reject<Msg, Pos>
+            >
+          {};
+        };
+      public:
+        typedef accept_when type;
+        
+        template <class S, class Pos>
+        struct apply :
+          boost::mpl::if_<
+            is_error<typename P::template apply<S, Pos> >,
+            P,
+            unchecked
+          >::type::template apply<
+            S,
+            Pos
+          >
+        {};
+      };
+    }
+  }
+}
+
+#endif
+