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>
62 lines
2.0 KiB
Dart
62 lines
2.0 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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trustLocals();
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trustFunctions();
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inferFromFunctions();
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}
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////////////////////////////////////////////////////////////////////////////////
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// Test that we trust the explicit type of a local.
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////////////////////////////////////////////////////////////////////////////////
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/*member: _trustLocals:[exact=JSBool]*/ _trustLocals(
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int Function(int) /*[null|subclass=Closure]*/ f) {
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int c = f(0);
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return c /*invoke: [null|subclass=JSInt]*/ == 0;
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}
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/*member: trustLocals:[null]*/
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trustLocals() {
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_trustLocals(/*[exact=JSUInt31]*/ (/*[exact=JSUInt31]*/ o) => o);
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_trustLocals(null);
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}
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////////////////////////////////////////////////////////////////////////////////
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// Test that we infer the type of a dynamic local from the type of the function.
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////////////////////////////////////////////////////////////////////////////////
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/*member: _trustFunctions:[exact=JSBool]*/
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_trustFunctions(int Function(int) /*[null|subclass=Closure]*/ f) {
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dynamic c = f(0);
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c = f(0);
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return c /*invoke: [null|subclass=JSInt]*/ == 0;
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}
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/*member: trustFunctions:[null]*/
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trustFunctions() {
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_trustFunctions(/*[exact=JSUInt31]*/ (/*[exact=JSUInt31]*/ o) => o);
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_trustFunctions(null);
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}
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////////////////////////////////////////////////////////////////////////////////
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// Test that we infer the type of a 'var' local from the type of the function.
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////////////////////////////////////////////////////////////////////////////////
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/*member: _inferFromFunctions:[exact=JSBool]*/
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_inferFromFunctions(int Function(int) /*[null|subclass=Closure]*/ f) {
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var c = f(0);
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return c /*invoke: [null|subclass=JSInt]*/ == 0;
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}
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/*member: inferFromFunctions:[null]*/
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inferFromFunctions() {
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_inferFromFunctions(/*[exact=JSUInt31]*/ (/*[exact=JSUInt31]*/ o) => o);
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_inferFromFunctions(null);
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}
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