stage0 新增内存复制指令 重构vm交互

stage2/sema.spl

@@ -1268,6 +1268,15 @@ fn bind_pattern(self: *Sema, pat_ref: usize, matched_tid: usize) {
             pat.resolved_lang_tid = matched_tid;
         },
         .PatternUnderscore => {},
+        .PatternRef(x) => {
+            if matched_tid == 0 {
+                diag(self, pat.span, .TypeMismatch, "ref pattern requires a concrete type");
+                ret;
+            }
+            var ptr = LangType.make_ptr(&self.types, matched_tid);
+            bind_pattern(self, x.pat, ptr);
+            pat.resolved_lang_tid = ptr;
+        },
         .PatternList(x) => {
             var i: usize = 0;
             while i < x.items.len {