// Copyright (C) 2016 the V8 project authors. All rights reserved. // This code is governed by the BSD license found in the LICENSE file. /*--- esid: sec-initializers-in-forin-statement-heads description: > for-in initializers in nonstrict mode flags: [noStrict] ---*/ (function() { var effects = 0; for (var a = ++effects in {}); assert.sameValue(effects, 1); })(); (function() { var stored; for (var a = 0 in stored = a, {}); assert.sameValue(stored, 0); })(); (function() { for (var a = 0 in {}); assert.sameValue(a, 0); })(); (function() { var effects = 0; var iterations = 0; var stored; for (var a = (++effects, -1) in stored = a, {a: 0, b: 1, c: 2}) { ++iterations; } assert.sameValue(stored, -1, "Initialized value should be available to RHS"); assert.sameValue(effects, 1, "Initializer should only be executed once"); assert.sameValue(iterations, 3, "Loop body should be executed the appropriate number of times"); })();