start working on oop runtime

src/runtime/objects/object.h

@@ -0,0 +1,29 @@
+#ifndef OBJECT_H
+#define OBJECT_H
+#include "../internals/hashmap/hashmap.h"
+#include <gmp.h>
+#include <stdbool.h>
+
+typedef enum {
+  TYPE_NULL,
+  TYPE_BOOL,
+  TYPE_NUMBER,
+  TYPE_STRING,
+  TYPE_FUNCTION,
+  TYPE_NATIVE_FUNCTION,
+  TYPE_OBJECT, // generic user object
+} ArgonType;
+
+struct ArgonObject {
+  ArgonType type;
+  struct ArgonObject *cls; // class pointer or type object
+  struct hashmap *fields;  // dynamic fields/methods
+  union {
+    mpq_t as_number;
+    bool as_bool;
+    char *as_str;
+    void *native_fn;
+    // others as needed
+  } value;
+};
+#endif // OBJECT_H