95145fa826
This patch moves the semantics of 'const' in sloppy mode to match those in strict mode, that is, const makes lexical (let-like) bindings, must have an initializer, and does not create properties of the global object. R=adamk LOG=Y BUG=v8:3305 CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel Review URL: https://codereview.chromium.org/1571873004 Cr-Commit-Position: refs/heads/master@{#33218}
119 lines
3.9 KiB
JavaScript
119 lines
3.9 KiB
JavaScript
// Copyright 2013 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: --expose-debug-as debug --debug-eval-readonly-locals --legacy-const
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Debug = debug.Debug
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listenerComplete = false;
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exception = false;
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// var0: init after break point, changed by debug eval.
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// const0: init before break point, changed by debug eval.
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// const1: init after break point, materialized but untouched by debug eval.
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// const2: init after break point, materialized and changed by debug eval.
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// const3: context allocated const, init before break point, changed by eval.
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function f() {
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var var1 = 21;
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const const3 = 3;
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function g() {
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const const0 = 0;
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assertEquals(undefined, const1);
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assertEquals(undefined, const2);
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assertEquals(3, const3);
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assertEquals(21, var1);
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debugger; // Break point.
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assertEquals(undefined, var0);
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assertEquals(0, const0);
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assertEquals(undefined, const1);
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assertEquals(undefined, const2);
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var var0 = 20;
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const const1 = 1;
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const const2 = 2;
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assertEquals(20, var0);
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assertEquals(1, const1);
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assertEquals(2, const2);
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}
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g();
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assertEquals(21, var1);
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assertEquals(3, const3);
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}
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function listener(event, exec_state, event_data, data) {
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if (event != Debug.DebugEvent.Break) return;
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try {
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var frame = exec_state.frame(0);
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var evaluate = function(something) {
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return frame.evaluate(something).value()
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}
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var count = frame.localCount();
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assertEquals(4, count);
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var expectation = { "const0" : 0,
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"const1" : undefined,
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"const2" : undefined,
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"const3" : 3,
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"var0" : undefined,
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"var1" : 21 };
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for (var i = 0; i < frame.localCount(); ++i) {
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var name = frame.localName(i);
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var value = frame.localValue(i).value();
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assertEquals(expectation[name], value);
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}
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evaluate('const0 = 10');
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evaluate('const2 = 12');
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evaluate('const3 = 13');
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evaluate('var0 = 30');
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evaluate('var1 = 31');
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// Indicate that all was processed.
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listenerComplete = true;
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} catch (e) {
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exception = e;
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print("Caught something. " + e + " " + e.stack);
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};
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};
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// Run and compile before debugger is active.
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try { f(); } catch (e) { }
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Debug.setListener(listener);
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f();
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Debug.setListener(null);
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assertFalse(exception, "exception in listener")
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assertTrue(listenerComplete);
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