Remove support for legacy const, part 1

test/mjsunit/const-eval-init.js

-// Copyright 2009 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
-//       with the distribution.
-//     * Neither the name of Google Inc. nor the names of its
-//       contributors may be used to endorse or promote products derived
-//       from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Flags: --allow-natives-syntax --legacy-const
-
-// Test the handling of initialization of deleted const variables.
-// This only makes sense in local scopes since the declaration and
-// initialization of consts in the global scope happen at the same
-// time.
-
-function testIntroduceGlobal() {
-  var source =
-      // Deleting 'x' removes the local const property.
-      "delete x;" +
-      // Initialization redefines global 'x'.
-      "const x = 3; assertEquals(3, x);" +
-      // Test constness of the global 'x'.
-      "x = 4; assertEquals(3, x);";
-  eval(source);
-}
-
-testIntroduceGlobal();
-assertEquals("undefined", typeof x);
-
-function testAssignExistingGlobal() {
-  var source =
-      // Delete 'x' to remove the local const property.
-      "delete x;" +
-      // Initialization redefines global 'x'.
-      "const x = 5; assertEquals(5, x);" +
-      // Test constness of the global 'x'.
-      "x = 6; assertEquals(5, x);";
-  eval(source);
-}
-
-testAssignExistingGlobal();
-assertEquals("undefined", typeof x);
-
-function testAssignmentArgument(x) {
-  function local() {
-    var source = "delete x; const x = 7; assertEquals(7, x)";
-    eval(source);
-  }
-  local();
-  assertEquals("undefined", typeof x);
-}
-
-for (var i = 0; i < 5; i++) {
-  testAssignmentArgument();
-}
-%OptimizeFunctionOnNextCall(testAssignmentArgument);
-testAssignmentArgument();
-assertEquals("undefined", typeof x);
-
-__defineSetter__('x', function() { throw 42; });
-var finished = false;
-function testRedefineGlobal() {
-  // Initialization redefines global 'x'.
-  var source = "delete x; const x = 8; finished = true;";
-  eval(source);
-}
-
-testRedefineGlobal();
-assertTrue(finished);
-
-function testInitFastCaseExtension() {
-  var source = "const x = 9; assertEquals(9, x); x = 10; assertEquals(9, x)";
-  eval(source);
-}
-
-testInitFastCaseExtension();
-
-function testInitSlowCaseExtension() {
-  var source = "";
-  // Introduce 100 properties on the context extension object to force
-  // it in slow case.
-  for (var i = 0; i < 100; i++) source += ("var a" + i + " = " + i + ";");
-  source += "const x = 10; assertEquals(10, x); x = 11; assertEquals(10, x)";
-  eval(source);
-}
-
-testInitSlowCaseExtension();
-
-function testAssignSurroundingContextSlot() {
-  var x = 12;
-  function local() {
-    var source = "delete x; const x = 13; assertEquals(13, x)";
-    eval(source);
-  }
-  local();
-  assertEquals(12, x);
-}
-
-testAssignSurroundingContextSlot();