Mayank Patke
553ac951b3
Change-Id: I5d4c0b4d15a05cfc30d87003785ca841c46b1a0f Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/426583 Reviewed-by: Stephen Adams <sra@google.com>
57 lines
1.8 KiB
Dart
57 lines
1.8 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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/*member: main:[null|powerset={null}]*/
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main() {
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ifNull();
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ifNotNullInvoke();
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notIfNotNullInvoke();
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}
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////////////////////////////////////////////////////////////////////////////////
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// If-null on parameter.
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////////////////////////////////////////////////////////////////////////////////
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/*member: _ifNull:[exact=JSUInt31|powerset={I}{O}{N}]*/
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_ifNull(/*[null|exact=JSUInt31|powerset={null}{I}{O}{N}]*/ o) => o ?? 0;
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/*member: ifNull:[null|powerset={null}]*/
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ifNull() {
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_ifNull(null);
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_ifNull(0);
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}
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////////////////////////////////////////////////////////////////////////////////
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// If-not-null access on parameter.
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////////////////////////////////////////////////////////////////////////////////
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/*member: _ifNotNullInvoke:[null|exact=JSBool|powerset={null}{I}{O}{N}]*/
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_ifNotNullInvoke(/*[null|exact=JSUInt31|powerset={null}{I}{O}{N}]*/ o) {
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return o
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?.
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/*[exact=JSUInt31|powerset={I}{O}{N}]*/
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isEven;
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}
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/*member: ifNotNullInvoke:[null|powerset={null}]*/
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ifNotNullInvoke() {
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_ifNotNullInvoke(null);
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_ifNotNullInvoke(0);
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}
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////////////////////////////////////////////////////////////////////////////////
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// As above but unconditional access.
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////////////////////////////////////////////////////////////////////////////////
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/*member: _notIfNotNullInvoke:[exact=JSBool|powerset={I}{O}{N}]*/
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_notIfNotNullInvoke(/*[null|exact=JSUInt31|powerset={null}{I}{O}{N}]*/ o) {
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return o. /*[null|exact=JSUInt31|powerset={null}{I}{O}{N}]*/ isEven;
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}
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/*member: notIfNotNullInvoke:[null|powerset={null}]*/
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notIfNotNullInvoke() {
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_notIfNotNullInvoke(null);
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_notIfNotNullInvoke(0);
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}
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