Add 'xo-expression/' from commit '5ac3c03a0c'

git-subtree-dir: xo-expression
git-subtree-mainline: d0f5ccc1ce
git-subtree-split: 5ac3c03a0c

xo-expression/src/expression/Expression.cpp

@@ -0,0 +1,11 @@
+/* @file Expression.cpp */
+
+#include "Expression.hpp"
+
+namespace xo {
+    namespace ast {
+    } /*namespace ast*/
+} /*namespace xo*/
+
+
+/* end Expression.cpp */