added skeleton for parsing

simulator_SIC_XE/src/code.cpp

@@ -0,0 +1,20 @@
+#include "code.h"
+
+void Code::addLine(const std::shared_ptr<Node> &line)
+{
+    _lines.emplace_back(line);
+}
+
+const std::vector<std::shared_ptr<Node>> &Code::getLines() const
+{
+    return _lines;
+}
+
+const string Code::toString() const
+{
+    string result;
+    for (const auto& line : _lines) {
+        result += line->toString() + "\n";
+    }
+    return result;
+}