Johnni Winther
ab694d352d
In the inferrer code like `local == null` would use the type information for the operands to determine whether the call was `o == null` or `null == o`. This had the side effect that if the left operand was a local variable known to have value `null` the case would be treated as `null == o` and the local would not be promoted to non-null on the false branch. Change-Id: I5fa08f8c891578f4c8e337e6cf5882fc2383063f Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/189210 Commit-Queue: Johnni Winther <johnniwinther@google.com> Reviewed-by: Mayank Patke <fishythefish@google.com>
54 lines
1.3 KiB
Dart
54 lines
1.3 KiB
Dart
// Copyright (c) 2018, 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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nonNullStaticField();
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nonNullInstanceField1();
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nonNullInstanceField2();
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nonNullLocal();
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}
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/*member: staticField:[null|exact=JSUInt31]*/
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var staticField;
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/*member: nonNullStaticField:[exact=JSUInt31]*/
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nonNullStaticField() => staticField ??= 42;
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/*member: Class1.:[exact=Class1]*/
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class Class1 {
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/*member: Class1.field:[null|exact=JSUInt31]*/
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var field;
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}
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/*member: nonNullInstanceField1:[exact=JSUInt31]*/
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nonNullInstanceField1() {
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return new Class1(). /*[exact=Class1]*/ /*update: [exact=Class1]*/ field ??=
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42;
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}
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/*member: Class2.:[exact=Class2]*/
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class Class2 {
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/*member: Class2.field:[null|exact=JSUInt31]*/
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var field;
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/*member: Class2.method:[exact=JSUInt31]*/
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method() {
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return /*[exact=Class2]*/ /*update: [exact=Class2]*/ field ??= 42;
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}
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}
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/*member: nonNullInstanceField2:[exact=JSUInt31]*/
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nonNullInstanceField2() {
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return new Class2(). /*invoke: [exact=Class2]*/ method();
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}
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/*member: nonNullLocal:[exact=JSUInt31]*/
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nonNullLocal() {
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var local = null;
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return local ??= 42;
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}
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