Use closure conversion in new dart2js backend.

tests/language/for_variable_capture_test.dart

+// Copyright (c) 2014, 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";
+
+run(callback) => callback();
+
+
+initializer() {
+        var closure;
+        for (var i=0, fn = () => i; i < 3; i++) {
+                i += 1;
+                closure = fn;
+        }
+        Expect.equals(1, closure());
+}
+
+condition() {
+        var closures = [];
+        check(callback) {
+                closures.add(callback);
+                return callback();
+        }
+        var values = [];
+        for (var i=0; check(() => ++i) < 8; ++i) {
+                values.add(i);
+        }
+        Expect.listEquals([1, 3, 5, 7], values);
+        Expect.listEquals([2, 4, 6, 8, 10], closures.map(run).toList());
+}
+
+body() {
+        var closures = [];
+        for (var i=0, j=0; i<3; i++) {
+                j++;
+                closures.add(() => i);
+                closures.add(() => j);
+        }
+        Expect.listEquals([0, 1, 1, 2, 2, 3], closures.map(run).toList());
+}
+
+update() {
+        var closures = [];
+        check(callback) {
+                closures.add(callback);
+                return callback();
+        }
+        var values = [];
+        for (var i=0; i < 4; check(() => ++i)) {
+                values.add(i);
+        }
+        Expect.listEquals([0, 1, 2, 3], values);
+        Expect.listEquals([2, 3, 4, 5], closures.map(run).toList());
+}
+
+initializer_condition() {
+        var values = [];
+        for (var i=0, fn = () => i; run(() => ++i) < 3; ) {
+                values.add(i);
+                values.add(fn());
+        }
+        Expect.listEquals([1, 1, 2, 1], values);
+}
+
+initializer_update() {
+        var update_closures = [];
+        update(callback) {
+                update_closures.add(callback);
+                return callback();
+        }
+        var init_closure;
+        for (var i=0, fn = () => i; i < 4; update(() => ++i)) {
+                init_closure = fn;
+                if (i == 0) {
+                        ++i; // Mutate copy of 'i' from first iteration.
+                }
+        }
+        Expect.equals(1, init_closure());
+        Expect.listEquals([3, 4, 5], update_closures.map(run).toList());
+        Expect.equals(1, init_closure());
+}
+
+initializer_body() {
+        var closures = [];
+        for (var i=0, fn = () => i; i < 3; i++) {
+                closures.add(() => i);
+                closures.add(fn);
+                fn = () => i;
+        }
+        Expect.listEquals([0, 0, 1, 0, 2, 1], closures.map(run).toList());
+}
+
+condition_update() {
+        var cond_closures = [];
+        check(callback) {
+                cond_closures.add(callback);
+                return callback();
+        }
+        var update_closures = [];
+        update(callback) {
+                update_closures.add(callback);
+                return callback();
+        }
+        var values = [];
+        for (var i=0; check(() => i) < 4; update(() => ++i)) {
+                values.add(i);
+        }
+        Expect.listEquals([0, 1, 2, 3], values);
+
+        Expect.listEquals([0, 1, 2, 3, 4], cond_closures.map(run).toList());
+        Expect.listEquals(   [2, 3, 4, 5], update_closures.map(run).toList());
+        Expect.listEquals([0, 2, 3, 4, 5], cond_closures.map(run).toList());
+}
+
+condition_body() {
+        var cond_closures = [];
+        check(callback) {
+                cond_closures.add(callback);
+                return callback();
+        }
+        var body_closures = [];
+        do_body(callback) {
+                body_closures.add(callback);
+                return callback();
+        }
+        for (var i=0; check(() => i) < 4; ++i) {
+                do_body(() => i);
+        }
+        Expect.listEquals([0, 1, 2, 3, 4], cond_closures.map(run).toList());
+        Expect.listEquals([0, 1, 2, 3],    body_closures.map(run).toList());
+}
+
+initializer_condition_update() {
+        var init;
+        var cond_closures = [];
+        check(callback) {
+                cond_closures.add(callback);
+                return callback();
+        }
+        var update_closures = [];
+        update(callback) {
+                update_closures.add(callback);
+                return callback();
+        }
+        var values = [];
+        for (var i=0, fn = () => i; check(() => ++i) < 8; update(() => ++i)) {
+                init = fn;
+                values.add(i);
+        }
+        Expect.listEquals([1, 3, 5, 7], values);
+        Expect.equals(1, init());
+
+        Expect.listEquals([2, 4, 6, 8, 10], cond_closures.map(run).toList());
+        Expect.listEquals(   [5, 7, 9, 11], update_closures.map(run).toList());
+}
+
+initializer_condition_body() {
+        var init;
+        var cond_closures = [];
+        check(callback) {
+                cond_closures.add(callback);
+                return callback();
+        }
+        var body_closures = [];
+        do_body(callback) {
+                body_closures.add(callback);
+                return callback();
+        }
+        var values = [];
+        for (var i=0, fn = () => i; check(() => ++i) < 8; ) {
+                init = fn;
+                do_body(() => ++i);
+                values.add(i);
+        }
+        Expect.listEquals([2, 4, 6, 8], values);
+        Expect.equals(2, init());
+
+        Expect.listEquals([3, 5, 7,  9, 10], cond_closures.map(run).toList());
+        Expect.listEquals([4, 6, 8, 10],     body_closures.map(run).toList());
+}
+
+initializer_update_body() {
+        var init;
+        var update_closures = [];
+        update(callback) {
+                update_closures.add(callback);
+                return callback();
+        }
+        var body_closures = [];
+        do_body(callback) {
+                body_closures.add(callback);
+                return callback();
+        }
+        var values = [];
+        for (var i=0, fn = () => i; i < 8; update(() => ++i)) {
+                init = fn;
+                do_body(() => ++i);
+                values.add(i);
+        }
+        Expect.listEquals([1, 3, 5, 7], values);
+        Expect.equals(1, init());
+
+        Expect.listEquals(   [4, 6, 8, 9], update_closures.map(run).toList());
+        Expect.listEquals([2, 5, 7, 9],    body_closures.map(run).toList());
+}
+
+condition_update_body() {
+        var cond_closures = [];
+        check(callback) {
+                cond_closures.add(callback);
+                return callback();
+        }
+        var update_closures = [];
+        update(callback) {
+                update_closures.add(callback);
+                return callback();
+        }
+        var body_closures = [];
+        do_body(callback) {
+                body_closures.add(callback);
+                return callback();
+        }
+        var values = [];
+        for (var i=0; check(() => i) < 8; update(() => ++i)) {
+                do_body(() => ++i);
+                values.add(i);
+        }
+        Expect.listEquals([1, 3, 5, 7], values);
+
+        Expect.listEquals([1, 3, 5, 7, 8], cond_closures.map(run).toList());
+        Expect.listEquals(   [4, 6, 8, 9], update_closures.map(run).toList());
+        Expect.listEquals([2, 5, 7, 9],    body_closures.map(run).toList());
+        Expect.listEquals([2, 5, 7, 9, 9], cond_closures.map(run).toList());
+}
+
+initializer_condition_update_body() {
+        var init;
+        var cond_closures = [];
+        check(callback) {
+                cond_closures.add(callback);
+                return callback();
+        }
+        var update_closures = [];
+        update(callback) {
+                update_closures.add(callback);
+                return callback();
+        }
+        var body_closures = [];
+        do_body(callback) {
+                body_closures.add(callback);
+                return callback();
+        }
+        var values = [];
+        for (var i=0, fn = () => i; check(() => i) < 8; update(() => ++i)) {
+                init = fn;
+                do_body(() => ++i);
+                values.add(i);
+        }
+        Expect.listEquals([1, 3, 5, 7], values);
+        Expect.equals(1, init());
+
+        Expect.listEquals([1, 3, 5, 7, 8], cond_closures.map(run).toList());
+        Expect.listEquals(   [4, 6, 8, 9], update_closures.map(run).toList());
+        Expect.listEquals([2, 5, 7, 9],    body_closures.map(run).toList());
+        Expect.listEquals([2, 5, 7, 9, 9], cond_closures.map(run).toList());
+}
+
+main() {
+        initializer();
+        condition();
+        update();
+        body();
+        initializer_condition();
+        initializer_update();
+        initializer_body();
+        condition_update();
+        condition_body();
+        initializer_condition_update();
+        initializer_condition_body();
+        initializer_update_body();
+        condition_update_body();
+        initializer_condition_update_body();
+}