michael@0: /*
michael@0:  * Any copyright is dedicated to the Public Domain.
michael@0:  * http://creativecommons.org/licenses/publicdomain/
michael@0:  * Contributor: Dave Herman
michael@0:  */
michael@0: 
michael@0: function earlyError(src) {
michael@0:     var threw;
michael@0:     try {
michael@0:         eval(src);
michael@0:         threw = false;
michael@0:     } catch (expected) {
michael@0:         threw = true;
michael@0:     }
michael@0:     assertEq(threw, true);
michael@0: }
michael@0: 
michael@0: earlyError("'use strict'; let (x) 42;");
michael@0: earlyError("function f() { 'use strict'; let (x) 42;");
michael@0: earlyError("'use strict'; function id(x) { return x } let (a=1) a ? f : x++(42);");
michael@0: earlyError("function id(x) { return x } function f() { 'use strict'; let (a=1) a ? f : x++(42); }");
michael@0: earlyError("'use strict'; let (x=2, y=3) x=3, y=13");
michael@0: earlyError("function f() { 'use strict'; let (x=2, y=3) x=3, y=13 }");
michael@0: 
michael@0: x = "global";
michael@0: (let (x=2, y=3) x=3, y=13);
michael@0: assertEq(x, "global");
michael@0: assertEq(y, 13);
michael@0: 
michael@0: // https://bugzilla.mozilla.org/show_bug.cgi?id=569464#c12
michael@0: g = (let (x=7) x*x for each (x in [1,2,3]));
michael@0: for (let y in g) {
michael@0:     assertEq(y, 49);
michael@0: }
michael@0: 
michael@0: reportCompare(0, 0, "In strict mode, let expression statements are disallowed.");