Implement nullish coalescing operator (#3997)

JerryScript-DCO-1.0-Signed-off-by: bence gabor kis kisbg@inf.u-szeged.hu
2020-07-17 15:42:51 +02:00
parent f60e16d9d5
commit dfd9d4497a
13 changed files with 323 additions and 72 deletions
@@ -2922,6 +2922,20 @@ vm_loop (vm_frame_ctx_t *frame_ctx_p) /**< frame context */
          ecma_fast_free_value (value);
          continue;
        }
+#if ENABLED (JERRY_ESNEXT)
+        case VM_OC_BRANCH_IF_NULLISH:
+        {
+          left_value = stack_top_p[-1];
+
+          if (!ecma_is_value_null (left_value) && !ecma_is_value_undefined (left_value))
+          {
+            byte_code_p = byte_code_start_p + branch_offset;
+            continue;
+          }
+          --stack_top_p;
+          continue;
+        }
+#endif /* ENABLED (JERRY_ESNEXT) */
        case VM_OC_PLUS:
        case VM_OC_MINUS:
        {