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// Copyright (c) 2011, 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.
//
// Dart test for new function type alias.
// @dart = 2.9
import "package:expect/expect.dart";
class FunctionLiteralsTest {
static void testMain() {
f(x) {
return x * 2;
}
f(42); // make sure it is parsed as a function call
Expect.equals(20, f(10));
int g(x) {
return x * 2;
}
g(42); // make sure it is parsed as a function call
Expect.equals(20, g(10));
h(x) {
return x * 2;
}
h(42); // make sure it is parsed as a function call
Expect.equals(20, h(10));
dynamic a = (x) {
return x + 2;
};
Expect.equals(7, a(5));
Expect.equals(
10,
apply((k) {
return k << 1;
}, 5));
Expect.equals(20, apply((k) => k << 1, 10));
a = new A(3);
Expect.equals(-1, a.f);
Expect.equals(-3, a.f2);
a = new A.n(5);
Expect.equals(-2, a.f);
Expect.equals(2, a.f2);
Expect.equals(true, isOdd(5));
Expect.equals(false, isOdd(8));
var b = new B(10);
Expect.equals(10, b.n);
Expect.equals(100, (b.f)(10));
b = new B.withZ(10);
Expect.equals(10, b.n);
Expect.equals(101, (b.f)(10));
var c = new C(5);
Expect.equals("2*x is 10", c.s);
int x = 0;
int y = 1;
// make sure this isn't parsed as a generic type
Expect.isTrue(x < y, "foo");
}
}
apply(f, n) {
return f(n);
}
bool isOdd(b) => b % 2 == 1;
class A {
int f;
int f2;
A(p) : f = apply((j) => 2 - j, p) {
/* constr. body */
f2 = -p;
}
A.n(p) : f = 1 + apply((j) => 2 - j, p) {
/* constr. body */
f2 = -f;
}
}
class B {
var f;
int n;
B(z) : f = ((x) => x * x) {
n = z;
}
B.withZ(z)
: f = ((x) {
return x * x + 1;
}) {
n = z;
}
}
class C {
String s;
C(x) : s = "2*x is ${() { return 2*x; }()}";
}
main() {
FunctionLiteralsTest.testMain();
}