michael@0: load(libdir + "eqArrayHelper.js");
michael@0: 
michael@0: var check = [];
michael@0: function t(token) {
michael@0:     check.push(token);
michael@0:     return token;
michael@0: }
michael@0: let f = (...x) => x;
michael@0: f(3, ...[t(1)], ...[t(2), t(3)], 34, 42, ...[t(4)]);
michael@0: assertEqArray(check, [1, 2, 3, 4]);
michael@0: 
michael@0: var arr = [1, 2, 3];
michael@0: assertEqArray(f(...arr, arr.pop()), [1, 2, 3, 3]);