1 files changed, 17 insertions, 1 deletions
diff --git a/eval.h b/eval.h
index 649f5e9..eba8244 100644
--- a/eval.h
+++ b/eval.h
@@ -2,8 +2,11 @@
 
 #include "ast.h"
 
+#include <stdbool.h>
 #include <stdint.h>
 
+#define VARIABLES_MAX 64
+
 enum TypeKind
 {
     KIND_VOID,
@@ -20,10 +23,23 @@ struct Type
     int64_t number;
 };
 
+struct Variable
+{
+    char name[NAME_LENGTH_MAX + 1];
+    int64_t value;
+    bool declared;
+};
+
+struct Machine
+{
+    struct Variable variables[VARIABLES_MAX];
+};
+
 enum RunStatus
 {
     RUN_DONE,
     RUN_FAILED
 };
 
-enum RunStatus execute(const struct Node* statement);
+void machine_init(struct Machine* machine);
+enum RunStatus execute(struct Machine* machine, const struct Node* statement);