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Issue 7616009: Parse harmony let declarations. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Updated tests. Created 9 years, 4 months ago
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1 // Copyright 2011 the V8 project authors. All rights reserved. 1 // Copyright 2011 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without 2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are 3 // modification, are permitted provided that the following conditions are
4 // met: 4 // met:
5 // 5 //
6 // * Redistributions of source code must retain the above copyright 6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer. 7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above 8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following 9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided 10 // disclaimer in the documentation and/or other materials provided
11 // with the distribution. 11 // with the distribution.
12 // * Neither the name of Google Inc. nor the names of its 12 // * Neither the name of Google Inc. nor the names of its
13 // contributors may be used to endorse or promote products derived 13 // contributors may be used to endorse or promote products derived
14 // from this software without specific prior written permission. 14 // from this software without specific prior written permission.
15 // 15 //
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 27
28 // Flags: --allow-natives-syntax --harmony-block-scoping 28 // Flags: --harmony-block-scoping
29 // Test functionality of block scopes.
30 29
31 // Hoisting of var declarations. 30 // Test let declarations in various settings.
32 function f1() { 31
33 { 32 // Global
34 var x = 1; 33 let x;
35 var y; 34 let y = 2;
36 } 35
37 assertEquals(1, x) 36 // Block local
38 assertEquals(undefined, y) 37 {
38 let y;
39 let x = 3;
39 } 40 }
40 f1();
41 41
42 // Dynamic lookup through block scopes. 42 if (true) {
43 function f2(one) { 43 let x;
44 var x = one + 1;
45 // TODO(keuchel): introduce let
46 // let y = one + 2;
47 if (one == 1) {
48 // Parameter
49 assertEquals(1, eval('one'));
50 // Function local var variable
51 assertEquals(2, eval('x'));
52 // Function local let variable
53 // TODO(keuchel): introduce let
54 // assertEquals(3, eval('y'));
55 }
56 } 44 }
57 f2(1);
58 45
Lasse Reichstein 2011/08/16 11:00:46 Try checking the value of x and y here, just for s
Steven 2011/08/16 15:06:08 Done.
46 // Unprotected statement
47 assertThrows("if (true) let x;", SyntaxError);
48 assertThrows("with ({}) let x;", SyntaxError);
49 assertThrows("do let x; while (false)", SyntaxError);
50 assertThrows("while (false) let x;", SyntaxError);
51
Lasse Reichstein 2011/08/16 11:00:46 Notic that these code blocks are executed using a
Steven 2011/08/16 15:06:08 It's more like checking the parser. On 2011/08/16
52 assertDoesNotThrow("if (true) var x;");
53 assertDoesNotThrow("with ({}) var x;");
54 assertDoesNotThrow("do var x; while (false)");
55 assertDoesNotThrow("while (false) var x;");
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