blob: b94165108f01fe27d2932a4014f101540f363a28 [file] [log] [blame]
// Copyright (c) 2020, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
//
// Test that optimization of named parameters doesn't change evaluation order.
import 'dart:math';
import 'package:expect/expect.dart';
int global = 0;
int inc() => ++global;
int dec() => global = max(0, --global);
// When converting named parameters to positional parameters, we
// follow alphabetical order. Ensure that argument evaluation order
// is unchanged.
void testNamedOrder(int w, {int z, int y, int x}) {
Expect.equals(w, 1);
Expect.equals(z, 2);
Expect.equals(y, 3);
Expect.equals(x, 2);
}
class TestNamedOrderBase {
TestNamedOrderBase(w, {int z, int y, int x}) {
testNamedOrder(w, z: z, y: y, x: x);
}
}
class TestNamedOrderSub extends TestNamedOrderBase {
int x;
TestNamedOrderSub()
: x = dec(),
super(inc(), z: inc(), y: inc(), x: dec()) {
Expect.equals(x, 0);
}
}
main() {
testNamedOrder(inc(), z: inc(), y: inc(), x: dec());
global = 1;
TestNamedOrderSub();
}