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Add tests for for-in initializers (#735)
These were re-introduced in sloppy mode per https://github.com/tc39/ecma262/pull/614
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test/annexB/language/statements/for-in/bare-initializer.js
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test/annexB/language/statements/for-in/bare-initializer.js
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// Copyright (C) 2016 the V8 project authors. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-initializers-in-forin-statement-heads
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description: >
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for-in heads prohibit AssignmentExpressions
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negative: SyntaxError
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---*/
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var a;
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throw NotEarlyError;
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for (a = 0 in {});
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test/annexB/language/statements/for-in/const-initializer.js
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test/annexB/language/statements/for-in/const-initializer.js
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// Copyright (C) 2016 the V8 project authors. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-initializers-in-forin-statement-heads
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description: >
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for-in initializers with const are prohibited
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negative: SyntaxError
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---*/
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throw NotEarlyError;
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for (const a = 0 in {});
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test/annexB/language/statements/for-in/let-initializer.js
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test/annexB/language/statements/for-in/let-initializer.js
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// Copyright (C) 2016 the V8 project authors. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-initializers-in-forin-statement-heads
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description: >
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for-in initializers with let are prohibited
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negative: SyntaxError
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---*/
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throw NotEarlyError;
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for (let a = 0 in {});
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// Copyright (C) 2016 the V8 project authors. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-initializers-in-forin-statement-heads
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description: >
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for-in initializers in nonstrict mode
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flags: [noStrict]
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---*/
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(function() {
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var effects = 0;
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for (var a = ++effects in {});
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assert.sameValue(effects, 1);
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})();
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(function() {
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var stored;
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for (var a = 0 in stored = a, {});
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assert.sameValue(stored, 0);
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})();
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(function() {
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for (var a = 0 in {});
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assert.sameValue(a, 0);
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})();
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(function() {
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var effects = 0;
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var iterations = 0;
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var stored;
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for (var a = (++effects, -1) in stored = a, {a: 0, b: 1, c: 2}) {
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++iterations;
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}
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assert.sameValue(stored, -1, "Initialized value should be available to RHS");
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assert.sameValue(effects, 1, "Initializer should only be executed once");
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assert.sameValue(iterations, 3, "Loop body should be executed the appropriate number of times");
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})();
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test/annexB/language/statements/for-in/strict-initializer.js
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test/annexB/language/statements/for-in/strict-initializer.js
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// Copyright (C) 2016 the V8 project authors. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-initializers-in-forin-statement-heads
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description: >
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for-in initializers in strict mode are prohibited
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negative: SyntaxError
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flags: [onlyStrict]
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---*/
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throw NotEarlyError;
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for (var a = 0 in {});
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// Copyright (C) 2016 the V8 project authors. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-initializers-in-forin-statement-heads
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description: >
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for-in initializers with ArrayBindingPatterns are always prohibited
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negative: SyntaxError
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---*/
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throw NotEarlyError;
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for (var [a] = 0 in {});
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// Copyright (C) 2016 the V8 project authors. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-initializers-in-forin-statement-heads
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description: >
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for-in initializers with ObjectBindingPattern are always prohibited
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negative: SyntaxError
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---*/
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throw NotEarlyError;
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for (var {a} = 0 in {});
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