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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(); }