xo-reader: refactor: + expect_symbol_xs [wip]

include/xo/reader/expect_symbol_xs.hpp

@@ -0,0 +1,27 @@
+/* file expect_symbol_xs.hpp
+ *
+ * author: Roland Conybeare, Aug 2024
+ */
+
+#pragma once
+
+#include "exprstate.hpp"
+
+namespace xo {
+    namespace scm {
+        /** @class expect_symbol_xs
+         *  @brief state machine to expect + capture a symbol
+         *
+         *  For example,  lhs in a define-expression
+         **/
+        class expect_symbol_xs : public exprstate {
+        public:
+            expect_symbol_xs();
+
+            static std::unique_ptr<expect_symbol_xs> expect_symbol_expression();
+        };
+    } /*namespace scm*/
+} /*namespace xo*/
+
+
+/* end expect_symbol_xs.hpp */

include/xo/reader/exprstate.hpp

@@ -70,9 +70,11 @@ namespace xo {
                 {}
             virtual ~exprstate() = default;
 
+#ifdef RELOCATED
             static std::unique_ptr<exprstate> expect_symbol() {
                 return std::make_unique<exprstate>(exprstate(exprstatetype::expect_symbol));
             }
+#endif
             static std::unique_ptr<exprstate> expect_type() {
                 return std::make_unique<exprstate>(exprstate(exprstatetype::expect_type));
             }