ccc827a6f8
- The global object has a reference to the current global scope chain. Running a script adds to the chain if it contains global lexical declarations. - Scripts are executed relative to a global, not a native context. - Harmony let and const bindings are allocated to the innermost global context; var and function still live on the global object. (Lexical bindings are not reflected on the global object at all, but that will probably change later using accessors, as for modules.) - Compilation of scripts now needs a (global) context (previously only eval did). - The global scope chain represents one logical scope, so collision tests take the chain into account. R=svenpanne@chromium.org BUG= Review URL: https://chromiumcodereview.appspot.com/10872084 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12398 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
136 lines
4.5 KiB
JavaScript
136 lines
4.5 KiB
JavaScript
// Copyright 2011 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Flags: --harmony-scoping
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// Test for conflicting variable bindings.
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// TODO(ES6): properly activate extended mode
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"use strict";
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function CheckException(e) {
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var string = e.toString();
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assertTrue(string.indexOf("has already been declared") >= 0 ||
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string.indexOf("redeclaration") >= 0);
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return 'Conflict';
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}
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function TestFunction(s,e) {
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try {
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return eval("(function(){" + s + ";return " + e + "})")();
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} catch (x) {
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return CheckException(x);
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}
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}
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function TestBlock(s,e) {
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try {
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return eval("(function(){ if (true) { " + s + "; }; return " + e + "})")();
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} catch (x) {
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return CheckException(x);
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}
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}
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function TestAll(expected,s,opt_e) {
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var e = "";
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var msg = s;
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if (opt_e) { e = opt_e; msg += "; " + opt_e; }
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assertEquals(expected, TestFunction(s,e), "function:'" + msg + "'");
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assertEquals(expected, TestBlock(s,e), "block:'" + msg + "'");
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}
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function TestConflict(s) {
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TestAll('Conflict', s);
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TestAll('Conflict', 'eval("' + s + '")');
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}
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function TestNoConflict(s) {
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TestAll('NoConflict', s, "'NoConflict'");
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TestAll('NoConflict', 'eval("' + s + '")', "'NoConflict'");
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}
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var letbinds = [ "let x",
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"let x = 0",
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"let x = undefined",
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"function x() { }",
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"let x = function() {}",
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"let x, y",
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"let y, x",
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"const x = 0",
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"const x = undefined",
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"const x = function() {}",
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"const x = 2, y = 3",
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"const y = 4, x = 5",
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];
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var varbinds = [ "var x",
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"var x = 0",
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"var x = undefined",
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"var x = function() {}",
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"var x, y",
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"var y, x",
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];
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for (var l = 0; l < letbinds.length; ++l) {
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// Test conflicting let/var bindings.
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for (var v = 0; v < varbinds.length; ++v) {
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// Same level.
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TestConflict(letbinds[l] +'; ' + varbinds[v]);
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TestConflict(varbinds[v] +'; ' + letbinds[l]);
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// Different level.
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TestConflict(letbinds[l] +'; {' + varbinds[v] + '; }');
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TestConflict('{ ' + varbinds[v] +'; }' + letbinds[l]);
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}
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// Test conflicting let/let bindings.
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for (var k = 0; k < letbinds.length; ++k) {
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// Same level.
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TestConflict(letbinds[l] +'; ' + letbinds[k]);
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TestConflict(letbinds[k] +'; ' + letbinds[l]);
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// Different level.
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TestNoConflict(letbinds[l] +'; { ' + letbinds[k] + '; }');
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TestNoConflict('{ ' + letbinds[k] +'; } ' + letbinds[l]);
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}
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// Test conflicting parameter/let bindings.
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TestConflict('(function (x) { ' + letbinds[l] + '; })()');
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}
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// Test conflicting catch/var bindings.
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for (var v = 0; v < varbinds.length; ++v) {
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TestConflict('try {} catch (x) { ' + varbinds[v] + '; }');
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}
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// Test conflicting parameter/var bindings.
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for (var v = 0; v < varbinds.length; ++v) {
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TestNoConflict('(function (x) { ' + varbinds[v] + '; })()');
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}
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