Strict mode delete.

test/mjsunit/strict-mode.js

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 246 matching lines @@
 CheckStrictMode("function strict() { var x = ++arguments; }", SyntaxError);
 
 // Prefix decrement with eval or arguments
 CheckStrictMode("function strict() { --eval; }", SyntaxError);
 CheckStrictMode("function strict() { --arguments; }", SyntaxError);
 CheckStrictMode("function strict() { print(--eval); }", SyntaxError);
 CheckStrictMode("function strict() { print(--arguments); }", SyntaxError);
 CheckStrictMode("function strict() { var x = --eval; }", SyntaxError);
 CheckStrictMode("function strict() { var x = --arguments; }", SyntaxError);
 
+// Delete of an unqialified identifier

[Mads Ager (chromium), 2011/02/14 10:27:24]

unqialified -> unqualified

[Martin Maly, 2011/02/14 21:46:51]

Done.

+CheckStrictMode("delete unqualified;", SyntaxError);
+CheckStrictMode("function strict() { delete unqualified; }", SyntaxError);
+CheckStrictMode("function function_name() { delete function_name; }", SyntaxError);

[Mads Ager (chromium), 2011/02/14 10:27:24]

Make these 80 char lines?

[Martin Maly, 2011/02/14 21:46:51]

Done.

+CheckStrictMode("function strict(parameter) { delete parameter; }", SyntaxError);
+CheckStrictMode("function strict() { var variable; delete variable; }", SyntaxError);
+CheckStrictMode("var variable; delete variable;", SyntaxError);
+
 // Prefix unary operators other than delete, ++, -- are valid in strict mode
 (function StrictModeUnaryOperators() {
   "use strict";
   var x = [void eval, typeof eval, +eval, -eval, ~eval, !eval];
   var y = [void arguments, typeof arguments,
            +arguments, -arguments, ~arguments, !arguments];
 })();
 
 // 7.6.1.2 Future Reserved Words
 var future_reserved_words = [
@@ skipping 90 matching lines @@
  for (var i = 0; i < n; i ++) { f(); }
 }
 
 repeat(10, function() { testAssignToUndefined(true); });
 possibly_undefined_variable_for_strict_mode_test = "value";
 repeat(10, function() { testAssignToUndefined(false); });
 delete possibly_undefined_variable_for_strict_mode_test;
 repeat(10, function() { testAssignToUndefined(true); });
 possibly_undefined_variable_for_strict_mode_test = undefined;
 repeat(10, function() { testAssignToUndefined(false); });
+
+(function testDeleteNonConfigurable() {
+  function delete_property(o) {
+    "use strict";
+    delete o.property;
+  }
+  function delete_element(o, i) {
+    "use strict";
+    delete o[i];
+  }
+
+  var object = {};
+
+  Object.defineProperty(object, "property", { value: "property_value" });
+  Object.defineProperty(object, "1", { value: "one" });
+  Object.defineProperty(object, 7, { value: "seven" });
+  Object.defineProperty(object, 3.14, { value: "pi" });
+
+  assertThrows(function() { delete_property(object); }, TypeError);
+  assertEquals(object.property, "property_value");
+  assertThrows(function() { delete_element(object, "1"); }, TypeError);
+  assertThrows(function() { delete_element(object, 1); }, TypeError);
+  assertEquals(object[1], "one");
+  assertThrows(function() { delete_element(object, "7"); }, TypeError);
+  assertThrows(function() { delete_element(object, 7); }, TypeError);
+  assertEquals(object[7], "seven");
+  assertThrows(function() { delete_element(object, "3.14"); }, TypeError);
+  assertThrows(function() { delete_element(object, 3.14); }, TypeError);
+  assertEquals(object[3.14], "pi");
+})();