Reorder i31ref and dataref (#3509)

The binary spec
(https://docs.google.com/document/d/1yAWU3dbs8kUa_wcnnirDxUu9nEBsNfq0Xo90OWx6yuo/edit#)
lists `dataref` after `i31ref`, and `dataref` also comes after `i31ref`
in its binary code in the value-increasing order. This reorders these
two in wasm-type.h and other places, although in most of those places
the order is irrelevant.

This also adds C and JS API for `dataref`.

1 files changed, 4 insertions, 4 deletions

diff --git a/src/wasm-type.h b/src/wasm-type.h
index 6b3fdb08f..bf3dd69de 100644
--- a/src/wasm-type.h
+++ b/src/wasm-type.h
@@ -74,10 +74,10 @@ public:
     externref,
     anyref,
     eqref,
-    dataref,
     i31ref,
+    dataref,
   };
-  static constexpr BasicType _last_basic_type = i31ref;
+  static constexpr BasicType _last_basic_type = dataref;
 
   Type() : id(none) {}
 
@@ -295,10 +295,10 @@ public:
     ext,
     any,
     eq,
-    data,
     i31,
+    data,
   };
-  static constexpr BasicHeapType _last_basic_type = i31;
+  static constexpr BasicHeapType _last_basic_type = data;
 
   // BasicHeapType can be implicitly upgraded to HeapType
   constexpr HeapType(BasicHeapType id) : id(id) {}