Joshua Litt
20faaa5d94
Change-Id: Ib18f554c1076f27a3f7c0df5a36410da41a1f467 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/148784 Reviewed-by: Paul Berry <paulberry@google.com> Reviewed-by: Sigmund Cherem <sigmund@google.com>
142 lines
4.1 KiB
Dart
142 lines
4.1 KiB
Dart
// Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// @dart = 2.7
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/*member: main:[null]*/
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main() {
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refineToClass();
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refineToClosure();
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}
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////////////////////////////////////////////////////////////////////////////////
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// Refine nullability of a non-captured local variable through a sequence of
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// accesses and updates.
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////////////////////////////////////////////////////////////////////////////////
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/*member: Class1.:[exact=Class1]*/
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class Class1 {
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/*member: Class1.method0:[null]*/
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method0() {}
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/*member: Class1.method1:[null]*/
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method1() {}
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/*member: Class1.field0:[null|exact=JSUInt31]*/
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var field0;
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/*member: Class1.field1:[null|exact=JSUInt31]*/
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var field1;
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}
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/*member: Class2.:[exact=Class2]*/
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class Class2 {
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/*member: Class2.method0:[null]*/
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method0() {}
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/*member: Class2.method2:[null]*/
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method2() {}
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/*member: Class2.field0:[null]*/
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var field0;
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/*member: Class2.field2:[null]*/
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var field2;
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}
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/*member: _refineUnion:Union([exact=Class1], [exact=Class2])*/
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_refineUnion(/*Union(null, [exact=Class1], [exact=Class2])*/ o) {
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o. /*invoke: Union(null, [exact=Class1], [exact=Class2])*/ method0();
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o. /*invoke: Union([exact=Class1], [exact=Class2])*/ method1();
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o. /*invoke: Union([exact=Class1], [exact=Class2])*/ method2();
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return o;
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}
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/*member: _refineFromMethod:[exact=Class1]*/
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_refineFromMethod(/*[null|exact=Class1]*/ o) {
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o. /*invoke: [null|exact=Class1]*/ method0();
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o. /*invoke: [exact=Class1]*/ method1();
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return o;
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}
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/*member: _refineFromGetter:[exact=Class2]*/
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_refineFromGetter(/*[null|exact=Class2]*/ o) {
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o. /*[null|exact=Class2]*/ field0;
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o. /*[exact=Class2]*/ field2;
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return o;
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}
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/*member: _refineFromSetter:[exact=Class1]*/
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_refineFromSetter(/*[null|exact=Class1]*/ o) {
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o. /*update: [null|exact=Class1]*/ field0 = 0;
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o. /*update: [exact=Class1]*/ field1 = 0;
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return o;
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}
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/*member: _noRefinementNullAware:[null|exact=Class1]*/
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_noRefinementNullAware(/*[null|exact=Class1]*/ o) {
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o
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?.
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/*invoke: [exact=Class1]*/
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method1();
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return o;
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}
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/*member: _noRefinementNullSelectors:[exact=Class2]*/
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_noRefinementNullSelectors(/*[null|exact=Class2]*/ o) {
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o /*invoke: [null|exact=Class2]*/ == 2;
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o. /*[null|exact=Class2]*/ hashCode;
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o. /*[null|exact=Class2]*/ runtimeType;
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o. /*[null|exact=Class2]*/ toString;
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o. /*[null|exact=Class2]*/ noSuchMethod;
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o. /*invoke: [null|exact=Class2]*/ toString();
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o. /*invoke: [null|exact=Class2]*/ noSuchMethod(null); // assumed to throw.
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o. /*[exact=Class2]*/ toString;
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return o;
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}
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/*member: _noRefinementUpdatedVariable:[null|exact=Class1]*/
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_noRefinementUpdatedVariable(/*[null|exact=Class1]*/ o) {
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(o = o). /*invoke: [null|exact=Class1]*/ method1();
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(o = o). /*invoke: [null|exact=Class1]*/ method0();
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return o;
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}
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/*member: _condition:Value([exact=JSBool], value: false)*/
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@pragma('dart2js:assumeDynamic')
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get _condition => false;
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/*member: refineToClass:[null]*/
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refineToClass() {
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var nullOrClass1 = _condition ? null : new Class1();
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var nullOrClass2 = _condition ? null : new Class2();
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_refineUnion(nullOrClass1);
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_refineUnion(nullOrClass2);
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_refineFromMethod(nullOrClass1);
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_refineFromGetter(nullOrClass2);
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_refineFromSetter(nullOrClass1);
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_noRefinementNullAware(nullOrClass1);
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_noRefinementNullSelectors(nullOrClass2);
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_noRefinementUpdatedVariable(nullOrClass1);
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}
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////////////////////////////////////////////////////////////////////////////////
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// Refine the type of a local variable through a sequence of invocations.
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////////////////////////////////////////////////////////////////////////////////
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/*member: _refineToClosureLocal:[subclass=Closure]*/
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_refineToClosureLocal() {
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var f = /*[null]*/ ({/*[exact=JSUInt31]*/ a}) {};
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f(a: 0);
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return f;
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}
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/*member: _refineToClosureLocalCall:[subclass=Closure]*/
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_refineToClosureLocalCall() {
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var f = /*[null]*/ ({/*[exact=JSUInt31]*/ b}) {};
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f.call(b: 0);
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return f;
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}
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/*member: refineToClosure:[null]*/
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refineToClosure() {
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_refineToClosureLocal();
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_refineToClosureLocalCall();
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}
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