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Issue 1571793002: Reland of Ship ES2015 sloppy-mode function hoisting, let, class (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 4 years, 11 months ago
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1 // Copyright 2014 the V8 project authors. All rights reserved. 1 // Copyright 2014 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 // Flags: --expose-debug-as debug --debug-eval-readonly-locals 5 // Flags: --expose-debug-as debug --debug-eval-readonly-locals
6 6
7 Debug = debug.Debug; 7 Debug = debug.Debug;
8 8
9 var step = 0; 9 var step = 0;
10 var exception = null; 10 var exception = null;
11 11
12 function listener(event, exec_state, event_data, data) { 12 function listener(event, exec_state, event_data, data) {
13 if (event != Debug.DebugEvent.Break) return; 13 if (event != Debug.DebugEvent.Break) return;
14 try { 14 try {
15 if (step == 0) { 15 if (step == 0) {
16 assertEquals("error", exec_state.frame(0).evaluate("e").value()); 16 assertEquals("error", exec_state.frame(0).evaluate("e").value());
17 exec_state.frame(0).evaluate("write_0('foo')"); 17 exec_state.frame(0).evaluate("write_0('foo')");
18 exec_state.frame(0).evaluate("write_1('modified')"); 18 exec_state.frame(0).evaluate("write_1('modified')");
19 } else { 19 } else {
20 assertEquals("foo", exec_state.frame(0).evaluate("e").value()); 20 assertEquals("argument", exec_state.frame(0).evaluate("e").value());
21 exec_state.frame(0).evaluate("write_2('bar')"); 21 exec_state.frame(0).evaluate("write_2('bar')");
22 } 22 }
23 step++; 23 step++;
24 } catch (e) { 24 } catch (e) {
25 print(e + e.stack); 25 print(e + e.stack);
26 exception = e; 26 exception = e;
27 } 27 }
28 } 28 }
29 29
30 Debug.setListener(listener); 30 Debug.setListener(listener);
31 31
32 function f(e, x) { 32 function f(e, x) {
33 try { 33 try {
34 throw "error"; 34 throw "error";
35 } catch(e) { 35 } catch(e) {
36 // 'e' and 'x' bind to the argument due to hoisting 36 // In ES2015 hoisting semantics, 'x' binds to the argument
37 // and 'e' binds to the exception.
37 function write_0(v) { e = v } 38 function write_0(v) { e = v }
38 function write_1(v) { x = v } 39 function write_1(v) { x = v }
39 debugger; 40 debugger;
40 assertEquals("error", e); 41 assertEquals("foo", e); // overwritten by the debugger
41 } 42 }
43 assertEquals("argument", e); // debugger did not overwrite
42 function write_2(v) { e = v } 44 function write_2(v) { e = v }
43 debugger; 45 debugger;
44 assertEquals("bar", e); 46 assertEquals("bar", e);
45 assertEquals("modified", x); 47 assertEquals("modified", x);
46 } 48 }
47 49
48 f("argument") 50 f("argument")
49 assertNull(exception); 51 assertNull(exception);
50 assertEquals(2, step); 52 assertEquals(2, step);
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