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// 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
// 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.
// Test let declarations in various settings.
// Global
let x;
let y = 2;
const z = 4;
class c { static foo() { return 1; } }
// Block local
{
let y;
let x = 3;
const z = 5;
class c { static foo() { return 2; } }
}
assertEquals(undefined, x);
assertEquals(2,y);
assertEquals(4,z);
assertEquals(1, c.foo());
if (true) {
let y;
assertEquals(undefined, y);
}
// Invalid declarations are early errors in harmony mode and thus should trigger
// an exception in eval code during parsing, before even compiling or executing
// the code. Thus the generated function is not called here.
function TestLocalThrows(str, expect) {
assertThrows("(function(arg){ 'use strict'; " + str + "})", expect);
}
function TestLocalDoesNotThrow(str) {
assertDoesNotThrow("(function(arg){ 'use strict'; " + str + "})()");
}
// Test let declarations in statement positions.
TestLocalThrows("if (true) let x;", SyntaxError);
TestLocalThrows("if (true) {} else let x;", SyntaxError);
TestLocalThrows("do let x; while (false)", SyntaxError);
TestLocalThrows("while (false) let x;", SyntaxError);
TestLocalThrows("label: let x;", SyntaxError);
TestLocalThrows("for (;false;) let x;", SyntaxError);
TestLocalDoesNotThrow("switch (true) { case true: let x; }");
TestLocalDoesNotThrow("switch (true) { default: let x; }");
// Test const declarations with initialisers in statement positions.
TestLocalThrows("if (true) const x = 1;", SyntaxError);
TestLocalThrows("if (true) {} else const x = 1;", SyntaxError);
TestLocalThrows("do const x = 1; while (false)", SyntaxError);
TestLocalThrows("while (false) const x = 1;", SyntaxError);
TestLocalThrows("label: const x = 1;", SyntaxError);
TestLocalThrows("for (;false;) const x = 1;", SyntaxError);
TestLocalDoesNotThrow("switch (true) { case true: const x = 1; }");
TestLocalDoesNotThrow("switch (true) { default: const x = 1; }");
// Test const declarations without initialisers.
TestLocalThrows("const x;", SyntaxError);
TestLocalThrows("const x = 1, y;", SyntaxError);
TestLocalThrows("const x, y = 1;", SyntaxError);
// Test const declarations without initialisers in statement positions.
TestLocalThrows("if (true) const x;", SyntaxError);
TestLocalThrows("if (true) {} else const x;", SyntaxError);
TestLocalThrows("do const x; while (false)", SyntaxError);
TestLocalThrows("while (false) const x;", SyntaxError);
TestLocalThrows("label: const x;", SyntaxError);
TestLocalThrows("for (;false;) const x;", SyntaxError);
TestLocalThrows("switch (true) { case true: const x; }", SyntaxError);
TestLocalThrows("switch (true) { default: const x; }", SyntaxError);
// Test var declarations in statement positions.
TestLocalDoesNotThrow("if (true) var x;");
TestLocalDoesNotThrow("if (true) {} else var x;");
TestLocalDoesNotThrow("do var x; while (false)");
TestLocalDoesNotThrow("while (false) var x;");
TestLocalDoesNotThrow("label: var x;");
TestLocalDoesNotThrow("for (;false;) var x;");
TestLocalDoesNotThrow("switch (true) { case true: var x; }");
TestLocalDoesNotThrow("switch (true) { default: var x; }");
// Test class declarations with initialisers in statement positions.
TestLocalThrows("if (true) class x { };", SyntaxError);
TestLocalThrows("if (true) {} else class x { };", SyntaxError);
TestLocalThrows("do class x { }; while (false)", SyntaxError);
TestLocalThrows("while (false) class x { };", SyntaxError);
TestLocalThrows("label: class x { };", SyntaxError);
TestLocalThrows("for (;false;) class x { };", SyntaxError);
TestLocalDoesNotThrow("switch (true) { case true: class x { }; }");
TestLocalDoesNotThrow("switch (true) { default: class x { }; }");
// Test that redeclarations of functions are only allowed in outermost scope.
TestLocalThrows("{ let f; var f; }");
TestLocalThrows("{ var f; let f; }");
TestLocalThrows("{ function f() {} let f; }");
TestLocalThrows("{ let f; function f() {} }");
TestLocalThrows("{ function f() {} var f; }");
TestLocalThrows("{ var f; function f() {} }");
TestLocalThrows("{ function f() {} class f {} }");
TestLocalThrows("{ class f {}; function f() {} }");
TestLocalThrows("{ function f() {} function f() {} }");
TestLocalThrows("function f() {} let f;");
TestLocalThrows("let f; function f() {}");
TestLocalThrows("function f() {} class f {}");
TestLocalThrows("class f {}; function f() {}");
TestLocalDoesNotThrow("function arg() {}");
TestLocalDoesNotThrow("function f() {} var f;");
TestLocalDoesNotThrow("var f; function f() {}");
TestLocalDoesNotThrow("function f() {} function f() {}");
function g(f) {
function f() { return 1 }
return f()
}
assertEquals(1, g(function() { return 2 }))
// Test function declarations in source element and
// sloppy statement positions.
function f() {
// Sloppy source element positions.
function g0() {
"use strict";
// Strict source element positions.
function h() { }
{
function h1() { }
}
}
{
function g1() { }
}
}
f();
// Test function declarations in statement position in strict mode.
TestLocalThrows("function f() { if (true) function g() {} }", SyntaxError);
TestLocalThrows("function f() { if (true) {} else function g() {} }", SyntaxError);
TestLocalThrows("function f() { do function g() {} while (false) }", SyntaxError);
TestLocalThrows("function f() { while (false) function g() {} }", SyntaxError);
TestLocalThrows("function f() { label: function g() {} }", SyntaxError);
TestLocalThrows("function f() { for (;false;) function g() {} }", SyntaxError);
TestLocalDoesNotThrow("function f() { switch (true) { case true: function g() {} } }");
TestLocalDoesNotThrow("function f() { switch (true) { default: function g() {} } }");
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