Robert Nystrom
1951879d70
Change-Id: Iec6318773d2d8d33832951a61b2d4df54027662d Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/151048 Commit-Queue: Bob Nystrom <rnystrom@google.com> Auto-Submit: Bob Nystrom <rnystrom@google.com> Reviewed-by: Erik Ernst <eernst@google.com>
75 lines
2.4 KiB
Dart
75 lines
2.4 KiB
Dart
// Copyright (c) 2019, 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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// Test cases where the syntax is ambiguous between maps and sets.
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import 'dart:collection';
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import 'package:expect/expect.dart';
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import 'helper_classes.dart';
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void main() {
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testBottomUpInference();
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testTopDownInference();
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}
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void testBottomUpInference() {
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Map<int, int> map = {};
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Set<int> set = Set();
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dynamic dynMap = map;
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dynamic dynSet = set;
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Iterable<int> iterable = [];
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CustomSet customSet = CustomSet();
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CustomMap customMap = CustomMap();
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// Note: The commented out cases are the error cases. They are shown here for
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// completeness and tested in map_set_ambiguity_error_test.dart.
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Expect.type<Map<int, int>>({...map});
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Expect.type<Set<int>>({...set});
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// Expect.type<...>({...dyn});
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Expect.type<Set<int>>({...iterable});
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Expect.type<Set<int>>({...customSet});
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Expect.type<Map<int, String>>({...customMap});
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Expect.type<Map<int, int>>({...map, ...map});
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// Expect.type<...>({...map, ...set});
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Expect.type<Map<dynamic, dynamic>>({...map, ...dynMap});
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// Expect.type<...>({...map, ...iterable});
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// Expect.type<...>({...map, ...customSet});
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Expect.type<Map<int, Object>>({...map, ...customMap});
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Expect.type<Set<int>>({...set, ...set});
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Expect.type<Set<dynamic>>({...set, ...dynSet});
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Expect.type<Set<int>>({...set, ...iterable});
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Expect.type<Set<int>>({...set, ...customSet});
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// Expect.type<...>({...set, ...customMap});
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// Expect.type<...>({...dyn, ...dyn});
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Expect.type<Set<dynamic>>({...dynSet, ...iterable});
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Expect.type<Set<dynamic>>({...dynSet, ...customSet});
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Expect.type<Map<dynamic, dynamic>>({...dynMap, ...customMap});
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Expect.type<Set<int>>({...iterable, ...iterable});
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Expect.type<Set<int>>({...iterable, ...customSet});
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// Expect.type<...>({...iterable, ...customMap});
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Expect.type<Set<int>>({...customSet, ...customSet});
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// Expect.type<...>({...customSet, ...customMap});
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Expect.type<Map<int, String>>({...customMap, ...customMap});
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}
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void testTopDownInference() {
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dynamic untypedMap = <int, int>{};
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dynamic untypedIterable = <int>[];
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Map<int, int> map = {...untypedMap};
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Set<int> set = {...untypedIterable};
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Iterable<int> iterable = {...untypedIterable};
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Expect.type<Map<int, int>>(map);
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Expect.type<Set<int>>(set);
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Expect.type<Set<int>>(iterable);
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}
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