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// Copyright (c) 2018, 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.
import "package:expect/expect.dart";
// Test that an omitted `new` is allowed for a generic constructor invocation.
class C<T> {
final T x;
C(this.x); // Not const constructor.
const C.c(this.x); // Const constructor.
operator <(other) => this;
operator >(other) => other;
operator -() => this;
C<T> get self => this;
C<T> method() => self;
}
T id<T>(T x) => x;
main() {
const cc = const C<int>.c(42); // Canonicalized.
var c0 = new C<int>(42); // Original syntax.
// Uses of `C<int>(42)` in various contexts.
var c1 = C<int>(42);
var c2 = [C<int>(42)][0];
var c3 = {C<int>(42): 0}.keys.first;
var c4 = {0: C<int>(42)}.values.first;
var c5 = id(C<int>(42));
var c6 = C<int>(42).self;
var c7 = C<int>(42).method();
var c8 = C(C<int>(42)).x;
var c9 = -C<int>(42);
var c10 = C<int>(42) < 9;
var c11 = C(null) > C<int>(42);
var c12 = (c10 == c11) ? null : C<int>(42);
var c13 = C<int>(42)..method();
var c14;
try {
throw C<int>(42);
} catch (e) {
c14 = e;
}
switch (C<int>(42)) {
case cc:
Expect.fail("Should not be const");
break;
default:
// Success.
}
for (C<int>(42); false; C<int>(42), C<int>(42)) {
Expect.fail("Unreachable");
}
var values = [
cc,
c0,
c1,
c2,
c3,
c4,
c5,
c6,
c7,
c8,
c9,
c10,
c11,
c12,
c13,
c14
];
Expect.allDistinct(values); // Non of them create constants.
for (var value in values) {
Expect.isTrue(value is C<int>);
Expect.equals(42, (value as C<int>).x);
}
}