xo-reader: streamline: + parserstatemachine::pop_exprstate() + use

src/reader/parserstatemachine.cpp

@@ -0,0 +1,19 @@
+/* file parserstatemachine.cpp
+ *
+ * author: Roland Conybeare
+ */
+
+#include "parserstatemachine.hpp"
+#include "exprstatestack.hpp"
+
+namespace xo {
+    namespace scm {
+        std::unique_ptr<exprstate>
+        parserstatemachine::pop_exprstate() {
+            return p_stack_->pop_exprstate();
+        }
+    } /*namespace scm*/
+} /*namespace xo*/
+
+
+/* end parserstatemachine.cpp */