xo-interpreter2: work towards utest w/ vsm+reader [WIP]

include/xo/interpreter2/VirtualSchematikaMachine.hpp

@@ -5,9 +5,12 @@
 
 #pragma once
 
+#include "VsmConfig.hpp"
 #include "VsmInstr.hpp"
+#include <xo/reader2/SchematikaReader.hpp>
 #include <xo/expression2/Expression.hpp>
 #include <xo/gc/GCObject.hpp>
+#include <xo/facet/box.hpp>
 
 namespace xo {
     namespace scm {
@@ -18,10 +21,11 @@ namespace xo {
         public:
             // will be DArenaVector<obj<StackFrame>> probably
             using Stack = void *;
+            using AAllocator = xo::mm::AAllocator;
             using AGCObject = xo::mm::AGCObject;
 
         public:
-            VirtualSchematikaMachine();
+            VirtualSchematikaMachine(const VsmConfig & config);
 
             /** borrow calling thread to run indefinitely,
              *  until halt instruction
@@ -93,6 +97,14 @@ namespace xo {
              *   value_
              */
 
+            /** configuration **/
+            VsmConfig config_;
+
+            box<AAllocator> mm_;
+
+            /** reader: text -> expression **/
+            SchematikaReader reader_;
+
             /** program counter **/
             VsmInstr pc_ = VsmInstr::halt();
 

include/xo/interpreter2/VsmConfig.hpp

@@ -0,0 +1,28 @@
+/** @file VsmConfig.hpp
+*
+ *  @author Roland Conybeare, Jan 2026
+ **/
+
+#pragma once
+
+#include <xo/reader2/ReaderConfig.hpp>
+#include <xo/gc/X1CollectorConfig.hpp>
+
+namespace xo {
+    namespace scm {
+        /** Configuration for virtual schematika machine 
+         **/
+        struct VsmConfig {
+            using X1CollectorConfig = xo::mm::X1CollectorConfig;
+
+            /** reader configuration **/
+            ReaderConfig rdr_config_;
+            /** Configuration for allocator/collector.
+             *  TODO: may want to make CollectorConfig polymorphic
+             **/
+            X1CollectorConfig x1_config_ = X1CollectorConfig().with_size(4*1024*1024);
+        };
+    } /*namespace scm*/
+} /*namespace xo*/
+
+/* end VsmConfig.hpp */

include/xo/interpreter2/init_interpreter2.hpp

@@ -0,0 +1,21 @@
+/** @file init_interpreter2.hpp
+ *
+ *  @author Roland Conybeare, Jan 2026
+ **/
+
+#pragma once
+
+#include <xo/subsys/Subsystem.hpp>
+
+namespace xo {
+    /* tag to represent the xo-interpreter2/ subsystem within ordered initialization */
+    enum S_interpreter2_tag {};
+
+    template <>
+    struct InitSubsys<S_interpreter2_tag> {
+        static void init();
+        static InitEvidence require();
+    };
+} /*namespace xo*/
+
+/* end init_interpreter2.hpp */