Better error recovery.

dart/tests/language/src/SyntaxTest.dart

+// Copyright (c) 2012, 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.
+
+class SyntaxTest {
+  // "this" cannot be used as a field name.
+  SyntaxTest this; /// 01: compile-time error
+
+  // Syntax error.
+  foo {} /// 02: compile-time error
+
+  // Syntax error.
+  static foo {} /// 03: compile-time error
+
+  // Syntax error.
+  operator +=() {} /// 04: compile-time error
+
+  // Syntax error.
+  operator -=() {} /// 05: compile-time error
+
+  // Syntax error.
+  operator *=() {} /// 06: compile-time error
+
+  // Syntax error.
+  operator /=() {} /// 07: compile-time error
+
+  // Syntax error.
+  operator ~/=() {} /// 08: compile-time error
+
+  // Syntax error.
+  operator %=() {} /// 09: compile-time error
+
+  // Syntax error.
+  operator <<=() {} /// 10: compile-time error
+
+  // Syntax error.
+  operator >>=() {} /// 11: compile-time error
+
+  // Syntax error.
+  operator >>>=() {} /// 12: compile-time error
+
+  // Syntax error.
+  operator &=() {} /// 13: compile-time error
+
+  // Syntax error.
+  operator ^=() {} /// 14: compile-time error
+
+  // Syntax error.
+  operator |=() {} /// 15: compile-time error
+
+  // Syntax error.
+  operator ?() {} /// 16: compile-time error
+
+  // Syntax error.
+  operator ||() {} /// 17: compile-time error
+
+  // Syntax error.
+  operator &&() {} /// 18: compile-time error
+
+  // Syntax error.
+  operator !=() {} /// 19: compile-time error
+
+  // Syntax error.
+  operator ===() {} /// 20: compile-time error
+
+  // Syntax error.
+  operator !==() {} /// 21: compile-time error
+
+  // Syntax error.
+  operator is() {} /// 22: compile-time error
+
+  // Syntax error.
+  operator !() {} /// 23: compile-time error
+
+  // Syntax error.
+  operator ++() {} /// 24: compile-time error
+
+  // Syntax error.
+  operator --() {} /// 25: compile-time error
+
+  // Syntax error.
+  bool operator ===(A other) { return true; } /// 26: compile-time error
+
+  int sample;
+}
+
+fisk {} /// 27: compile-time error
+
+class DOMWindow {}
+
+class Window extends DOMWindow
+native "*Window" /// 28: compile-time error
+{}
+
+class Console
+native "=(typeof console == 'undefined' ? {} : console)" /// 29: compile-time error
+{}
+
+class NativeClass
+native "FooBar" /// 30: compile-time error
+{}
+
+interface Fisk {}
+
+class BoolImplementation implements Fisk
+native "Boolean" /// 31: compile-time error
+{}
+
+class _JSON
+native 'JSON' /// 32: compile-time error
+{}
+
+class ListFactory<E> implements List<E>
+native "Array" /// 33: compile-time error
+{}
+
+interface I extends UNKNOWN; /// 34: compile-time error
+
+class XWindow extends DOMWindow
+hest "*Window" /// 35: compile-time error
+{}
+
+class XConsole
+hest "=(typeof console == 'undefined' ? {} : console)" /// 36: compile-time error
+{}
+
+class XNativeClass
+hest "FooBar" /// 37: compile-time error
+{}
+
+class XBoolImplementation implements Fisk
+hest "Boolean" /// 38: compile-time error
+{}
+
+class _JSONX
+hest 'JSON' /// 39: compile-time error
+{}
+
+class XListFactory<E> implements List<E>
+hest "Array" /// 40: compile-time error
+{}
+
+class YWindow extends DOMWindow
+for "*Window" /// 41: compile-time error
+{}
+
+class YConsole
+for "=(typeof console == 'undefined' ? {} : console)" /// 42: compile-time error
+{}
+
+class YNativeClass
+for "FooBar" /// 43: compile-time error
+{}
+
+class YBoolImplementation implements Fisk
+for "Boolean" /// 44: compile-time error
+{}
+
+class _JSONY
+for 'JSON' /// 45: compile-time error
+{}
+
+class YListFactory<E> implements List<E>
+for "Array" /// 46: compile-time error
+{}
+
+class A {
+  const A()
+  {} /// 47: compile-time error
+  ;
+}
+
+interface G<T> {}
+
+typedef <T>(); /// 48: compile-time error
+
+class B
+extends void /// 49: compile-time error
+{}
+
+main() {
+  try {
+    new SyntaxTest();
+    fisk(); /// 27: continued
+
+    new Window();
+    new Console();
+    new NativeClass();
+    new BoolImplementation();
+    new _JSON();
+    new ListFactory();
+    new ListFactory<Object>();
+    var x = null;
+    x is I; /// 34: continued
+
+    new XConsole();
+    new XNativeClass();
+    new XBoolImplementation();
+    new _JSONX();
+    new XListFactory();
+    new XListFactory<Object>();
+
+    new YConsole();
+    new YNativeClass();
+    new YBoolImplementation();
+    new _JSONY();
+    new YListFactory();
+    new YListFactory<Object>();
+
+    futureOf(x) {}
+    if (!(fisk futureOf(false))) {} /// 50: compile-time error
+    if (!(await futureOf(false))) {} /// 51: compile-time error
+
+    void f{} /// 52: compile-time error
+    G<int double> g; /// 53: compile-time error
+    f(void) {}; /// 54: compile-time error
+
+    optionalArg([x]) {}
+    optionalArg(
+      void (var i) {} /// 55: compile-time error
+    );
+
+    function __PROTO__$(...args) { return 12; } /// 56: compile-time error
+    G<> t; /// 57: compile-time error
+    G<null> t; /// 58: compile-time error
+    A<void> a = null; /// 59: compile-time error
+    void v; /// 60: compile-time error
+    void v = null; /// 61: compile-time error
+    print(null is void); /// 62: compile-time error
+    new B();
+
+  } catch (var ex) {
+    // Swallowing exceptions. Any error should be a compile-time error
+    // which kills the current isolate.
+  }
+}