1 // Copyright 2015 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Flags: --allow-natives-syntax --turbo-filter=test* 6 7 // Tests that TurboFan emits a dynamic hole-check for the temporal dead zone at 8 // a non-initializing assignments to a {let} variable. 9 function test_hole_check_for_let(a) { 10 'use strict'; 11 { switch (a) { 12 case 0: let x; 13 case 1: x = 9; 14 } 15 } 16 } 17 assertDoesNotThrow("test_hole_check_for_let(0)"); 18 assertThrows("test_hole_check_for_let(1)", ReferenceError); 19 %OptimizeFunctionOnNextCall(test_hole_check_for_let) 20 assertThrows("test_hole_check_for_let(1)", ReferenceError); 21 22 // Tests that TurboFan emits a dynamic hole-check for the temporal dead zone at 23 // a non-initializing assignments to a {const} variable. 24 function test_hole_check_for_const(a) { 25 'use strict'; 26 { switch (a) { 27 case 0: const x = 3; 28 case 1: x = 2; 29 } 30 } 31 } 32 assertThrows("test_hole_check_for_const(0)", TypeError); 33 assertThrows("test_hole_check_for_const(1)", ReferenceError); 34 %OptimizeFunctionOnNextCall(test_hole_check_for_const) 35 assertThrows("test_hole_check_for_const(1)", ReferenceError); 36
