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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
// Ensure the |arguments| object works as expected when a destructuring rest
// parameter is present.
// |arguments.length| with destructuring rest array.
function argsLengthEmptyRestArray(...[]) {
return arguments.length;
}
assertEq(argsLengthEmptyRestArray(), 0);
assertEq(argsLengthEmptyRestArray(10), 1);
assertEq(argsLengthEmptyRestArray(10, 20), 2);
function argsLengthRestArray(...[a]) {
return arguments.length;
}
assertEq(argsLengthRestArray(), 0);
assertEq(argsLengthRestArray(10), 1);
assertEq(argsLengthRestArray(10, 20), 2);
function argsLengthRestArrayWithDefault(...[a = 0]) {
return arguments.length;
}
assertEq(argsLengthRestArrayWithDefault(), 0);
assertEq(argsLengthRestArrayWithDefault(10), 1);
assertEq(argsLengthRestArrayWithDefault(10, 20), 2);
// |arguments.length| with destructuring rest object.
function argsLengthEmptyRestObject(...{}) {
return arguments.length;
}
assertEq(argsLengthEmptyRestObject(), 0);
assertEq(argsLengthEmptyRestObject(10), 1);
assertEq(argsLengthEmptyRestObject(10, 20), 2);
function argsLengthRestObject(...{a}) {
return arguments.length;
}
assertEq(argsLengthRestObject(), 0);
assertEq(argsLengthRestObject(10), 1);
assertEq(argsLengthRestObject(10, 20), 2);
function argsLengthRestObjectWithDefault(...{a = 0}) {
return arguments.length;
}
assertEq(argsLengthRestObjectWithDefault(), 0);
assertEq(argsLengthRestObjectWithDefault(10), 1);
assertEq(argsLengthRestObjectWithDefault(10, 20), 2);
// |arguments| access with destructuring rest array.
function argsAccessEmptyRestArray(...[]) {
return arguments[0];
}
assertEq(argsAccessEmptyRestArray(), undefined);
assertEq(argsAccessEmptyRestArray(10), 10);
assertEq(argsAccessEmptyRestArray(10, 20), 10);
function argsAccessRestArray(...[a]) {
return arguments[0];
}
assertEq(argsAccessRestArray(), undefined);
assertEq(argsAccessRestArray(10), 10);
assertEq(argsAccessRestArray(10, 20), 10);
function argsAccessRestArrayWithDefault(...[a = 0]) {
return arguments[0];
}
assertEq(argsAccessRestArrayWithDefault(), undefined);
assertEq(argsAccessRestArrayWithDefault(10), 10);
assertEq(argsAccessRestArrayWithDefault(10, 20), 10);
// |arguments| access with destructuring rest object.
function argsAccessEmptyRestObject(...{}) {
return arguments[0];
}
assertEq(argsAccessEmptyRestObject(), undefined);
assertEq(argsAccessEmptyRestObject(10), 10);
assertEq(argsAccessEmptyRestObject(10, 20), 10);
function argsAccessRestObject(...{a}) {
return arguments[0];
}
assertEq(argsAccessRestObject(), undefined);
assertEq(argsAccessRestObject(10), 10);
assertEq(argsAccessRestObject(10, 20), 10);
function argsAccessRestObjectWithDefault(...{a = 0}) {
return arguments[0];
}
assertEq(argsAccessRestObjectWithDefault(), undefined);
assertEq(argsAccessRestObjectWithDefault(10), 10);
assertEq(argsAccessRestObjectWithDefault(10, 20), 10);
if (typeof reportCompare === "function")
reportCompare(0, 0);