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

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

xo-expression/src/expression/ConvertExpr.cpp

@@ -0,0 +1,53 @@
+/* file ConvertExpr.cpp
+ *
+ * author: Roland Conybeare
+ */
+
+#include "ConvertExpr.hpp"
+
+namespace xo {
+    namespace ast {
+        rp<ConvertExpr>
+        ConvertExpr::make(TypeDescr dest_type,
+                          rp<Expression> arg)
+        {
+            return new ConvertExpr(dest_type,
+                                   std::move(arg));
+        }
+
+        std::set<std::string>
+        ConvertExpr::get_free_variables() const {
+            if (this->arg_)
+                return this->arg_->get_free_variables();
+            else
+                return std::set<std::string>();
+        }
+
+        void
+        ConvertExpr::display(std::ostream & os) const {
+            os << "<Convert"
+               << xtag("dest_type", this->valuetype()->short_name())
+               << xtag("arg", arg_)
+               << ">";
+        }
+
+        // ----- ConvertExprAccess -----
+
+        rp<ConvertExprAccess>
+        ConvertExprAccess::make(TypeDescr dest_type,
+                                rp<Expression> arg)
+        {
+            return new ConvertExprAccess(dest_type,
+                                         std::move(arg));
+        }
+
+        rp<ConvertExprAccess>
+        ConvertExprAccess::make_empty() {
+            return new ConvertExprAccess(nullptr /*dest_type*/,
+                                         nullptr /*arg*/);
+        }
+    } /*namespace ast*/
+} /*namespace xo*/
+
+
+/* end ConvertExpr.cpp */