1 files changed, 13 insertions, 0 deletions
diff --git a/internal.h b/internal.h
index 9069de1c83..0ac09bceeb 100644
--- a/internal.h
+++ b/internal.h
@@ -534,6 +534,7 @@ enum imemo_type {
     imemo_cref,
     imemo_svar,
     imemo_throw_data,
+    imemo_ifunc,
     imemo_mask = 0x07
 };
 
@@ -577,6 +578,18 @@ struct vm_throw_data {
 
 #define THROW_DATA_P(err) RB_TYPE_P((err), T_IMEMO)
 
+/* IFUNC */
+
+struct vm_ifunc {
+    VALUE flags;
+    VALUE reserved;
+    VALUE (*func)(ANYARGS);
+    const void *data;
+    ID id;
+};
+
+#define IFUNC_NEW(a, b) ((struct vm_ifunc *)rb_imemo_new(imemo_ifunc, (VALUE)(a), (VALUE)(b), 0, 0))
+
 /* MEMO */
 
 struct MEMO {