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

depends/x86_64-pc-linux-gnu/include/boost/vmd/is_empty_array.hpp

@@ -0,0 +1,98 @@
+
+//  (C) Copyright Edward Diener 2011-2015
+//  Use, modification and distribution are subject to 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).
+
+#if !defined(BOOST_VMD_IS_EMPTY_ARRAY_HPP)
+#define BOOST_VMD_IS_EMPTY_ARRAY_HPP
+
+#include <boost/vmd/detail/setup.hpp>
+
+#if BOOST_PP_VARIADICS
+
+#include <boost/preprocessor/control/iif.hpp>
+#include <boost/vmd/is_array.hpp>
+#include <boost/vmd/identity.hpp>
+#include <boost/vmd/detail/is_empty_array.hpp>
+
+/*
+
+  The succeeding comments in this file are in doxygen format.
+
+*/
+
+/** \file
+*/
+
+/** \def BOOST_VMD_IS_EMPTY_ARRAY(sequence)
+
+    \brief Tests whether a sequence is an empty Boost PP array.
+
+    An empty Boost PP array is a two element tuple where the first
+    size element is 0 and the second element is a tuple with a single 
+    empty element, ie. '(0,())'.
+    
+    sequence = a possible empty array
+
+    returns = 1 if the sequence is an empty Boost PP array
+              0 if it is not.
+              
+    The macro will generate a preprocessing error if the sequence
+    is in the form of an array but its first tuple element, instead
+    of being a number, is a preprocessor token which VMD cannot parse,
+    as in the example '(&0,())' which is a valid tuple but an invalid
+    array.
+    
+*/
+
+#define BOOST_VMD_IS_EMPTY_ARRAY(sequence) \
+    BOOST_VMD_IDENTITY_RESULT \
+        ( \
+        BOOST_PP_IIF \
+            ( \
+            BOOST_VMD_IS_ARRAY(sequence), \
+            BOOST_VMD_DETAIL_IS_EMPTY_ARRAY_SIZE, \
+            BOOST_VMD_IDENTITY(0) \
+            ) \
+        (sequence) \
+        ) \
+/**/
+
+/** \def BOOST_VMD_IS_EMPTY_ARRAY_D(d,sequence)
+
+    \brief Tests whether a sequence is an empty Boost PP array. Re-entrant version.
+
+    An empty Boost PP array is a two element tuple where the first
+    size element is 0 and the second element is a tuple with a single 
+    empty element, ie. '(0,())'.
+    
+    d        = The next available BOOST_PP_WHILE iteration. 
+    sequence = a possible empty array
+
+    returns = 1 if the sequence is an empty Boost PP array
+              0 if it is not.
+              
+    The macro will generate a preprocessing error if the sequence
+    is in the form of an array but its first tuple element, instead
+    of being a number, is a preprocessor token which VMD cannot parse,
+    as in the example '(&0,())' which is a valid tuple but an invalid
+    array.
+    
+*/
+
+#define BOOST_VMD_IS_EMPTY_ARRAY_D(d,sequence) \
+    BOOST_VMD_IDENTITY_RESULT \
+        ( \
+        BOOST_PP_IIF \
+            ( \
+            BOOST_VMD_IS_ARRAY_D(d,sequence), \
+            BOOST_VMD_DETAIL_IS_EMPTY_ARRAY_SIZE, \
+            BOOST_VMD_IDENTITY(0) \
+            ) \
+        (sequence) \
+        ) \
+/**/
+
+#endif /* BOOST_PP_VARIADICS */
+#endif /* BOOST_VMD_IS_EMPTY_ARRAY_HPP */