41eb990afe
The preparser has been out of sync with the parser. As a reminder, we have the
following grammer for harmony mode
Block ::
{ SourceElement* }
SourceElement ::
Statement
FunctionDeclaration
LetDeclaration
instead of
Block ::
{ Statement* }
SourceElement ::
Statement
FunctionDeclaration
The extension to allow FunctionDeclarations in statement positions in
non-strict code is still active.
Review URL: http://codereview.chromium.org/7983006
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9363 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
117 lines
4.6 KiB
JavaScript
117 lines
4.6 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-block-scoping
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// Test let declarations in various settings.
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// Global
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let x;
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let y = 2;
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// Block local
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{
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let y;
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let x = 3;
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}
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assertEquals(undefined, x);
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assertEquals(2,y);
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if (true) {
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let y;
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assertEquals(undefined, y);
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}
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// Invalid declarations are early errors in harmony mode and thus should trigger
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// an exception in eval code during parsing, before even compiling or executing
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// the code. Thus the generated function is not called here.
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function TestLocalThrows(str, expect) {
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assertThrows("(function(){" + str + "})", expect);
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}
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function TestLocalDoesNotThrow(str) {
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assertDoesNotThrow("(function(){" + str + "})()");
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}
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// Test let declarations statement positions.
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TestLocalThrows("if (true) let x;", SyntaxError);
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TestLocalThrows("if (true) {} else let x;", SyntaxError);
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TestLocalThrows("do let x; while (false)", SyntaxError);
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TestLocalThrows("while (false) let x;", SyntaxError);
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TestLocalThrows("label: let x;", SyntaxError);
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TestLocalThrows("for (;false;) let x;", SyntaxError);
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TestLocalThrows("switch (true) { case true: let x; }", SyntaxError);
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TestLocalThrows("switch (true) { default: let x; }", SyntaxError);
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// Test var declarations statement positions.
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TestLocalDoesNotThrow("if (true) var x;");
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TestLocalDoesNotThrow("if (true) {} else var x;");
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TestLocalDoesNotThrow("do var x; while (false)");
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TestLocalDoesNotThrow("while (false) var x;");
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TestLocalDoesNotThrow("label: var x;");
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TestLocalDoesNotThrow("for (;false;) var x;");
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TestLocalDoesNotThrow("switch (true) { case true: var x; }");
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TestLocalDoesNotThrow("switch (true) { default: var x; }");
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// Test function declarations in source element and
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// non-strict statement positions.
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function f() {
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// Non-strict source element positions.
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function g0() {
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"use strict";
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// Strict source element positions.
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function h() { }
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{
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function h1() { }
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}
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}
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{
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function g1() { }
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}
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// Non-strict statement positions.
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if (true) function g2() { }
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if (true) {} else function g3() { }
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do function g4() { } while (false)
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while (false) function g5() { }
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label: function g6() { }
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for (;false;) function g7() { }
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switch (true) { case true: function g8() { } }
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switch (true) { default: function g9() { } }
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}
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f();
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// Test function declarations in statement position in strict mode.
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TestLocalThrows("function f() { 'use strict'; if (true) function g() {}", SyntaxError);
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TestLocalThrows("function f() { 'use strict'; if (true) {} else function g() {}", SyntaxError);
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TestLocalThrows("function f() { 'use strict'; do function g() {} while (false)", SyntaxError);
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TestLocalThrows("function f() { 'use strict'; while (false) function g() {}", SyntaxError);
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TestLocalThrows("function f() { 'use strict'; label: function g() {}", SyntaxError);
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TestLocalThrows("function f() { 'use strict'; for (;false;) function g() {}", SyntaxError);
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TestLocalThrows("function f() { 'use strict'; switch (true) { case true: function g() {} }", SyntaxError);
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TestLocalThrows("function f() { 'use strict'; switch (true) { default: function g() {} }", SyntaxError);
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