Custom formatter cleanup Fix case where displaying a class constructor generated unreadable huge ou…

pkg/dev_compiler/tool/input_sdk/private/ddc_runtime/types.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /// This library defines the representation of runtime types.
 part of dart._runtime;
 
 final metadata = JS('', 'Symbol("metadata")');
 
 /// The symbol used to store the cached `Type` object associated with a class.
@@ skipping 495 matching lines @@
 functionType(returnType, args, extra) =>
     _functionType(false, returnType, args, extra);
 
 ///
 /// Create a definite function type. No substitution of dynamic for
 /// bottom occurs.
 ///
 definiteFunctionType(returnType, args, extra) =>
     _functionType(true, returnType, args, extra);
 
+bool isType(obj) => JS(
+    '',
+    '''(() => {
+  return $_getRuntimeType($obj) === $Type;
+  })()''');
+
 String typeName(type) => JS(
     '',
     '''(() => {
   if ($type === void 0) return "undefined type";
   if ($type === null) return "null type";
   // Non-instance types
   if ($type instanceof $TypeRep) {
     if ($type instanceof $Typedef) {
       return $type.name + "(" + $type.functionType.toString() + ")";
     }
@@ skipping 165 matching lines @@
 ///  mode may differ
 final isSubtype = JS(
     '', '$_subtypeMemo((t1, t2) => (t1 === t2) || $_isSubtype(t1, t2, true))');
 
 _isBottom(type) => JS('bool', '# == # || # == #', type, bottom, type, Null);
 
 _isTop(type) {
   if (JS('bool', '# === #', getGenericClass(type), getGenericClass(FutureOr))) {
     return _isTop(JS('', '#[0]', getGenericArgs(type)));
   }
-  return JS('bool', '# == # || # == # || # == #',
-      type, Object, type, dynamic, type, _void);
+  return JS('bool', '# == # || # == # || # == #', type, Object, type, dynamic,
+      type, _void);
 }
 
 _isSubtype(t1, t2, isCovariant) => JS(
     '',
     '''(() => {
   if ($t1 === $t2) return true;
 
   // Trivially true.
   if ($_isTop($t2) || $_isBottom($t1)) {
     return true;
@@ skipping 152 matching lines @@
     return true;
   }
 
   let typeArgs = $getGenericArgs($type);
   if (!typeArgs) return true;
   for (let t of typeArgs) {
     if (t != $Object && t != $dynamic) return false;
   }
   return true;
 })()''');