1 files changed, 7 insertions, 0 deletions
diff --git a/vm.c b/vm.c
index 0857571..2131c5a 100644
--- a/vm.c
+++ b/vm.c
@@ -274,6 +274,13 @@ int runvm(State *S) {
 			objarr_append(S, arr, v);
 			break;
 		}
+		case OP_ARRLEN: {
+			Val v = POP();
+			CHECK(IS_ARR(v), "can only get length of array");
+			ObjArr *arr = AS_ARR(v);
+			PUSH(VAL_NUM(arr->len));
+			break;
+		}
 		default:
 			ERROR("unknown opcode");