| // Copyright (c) 2024, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| /// A matcher that is used in completion to filter out suggestions. The criteria |
| /// used to filter is specified in the implementations of the matchers. |
| abstract class CompletionMatcher { |
| /// Computes how well the [candidate] matches the criteria specific to the |
| /// implementation of the [CompletionMatcher], and returns a value in the |
| /// range of [0, 1] for matching strings, and -1 for non-matching ones. |
| double score(String candidate); |
| } |
| |
| /// A [NoPrefixMatcher] will be used when there is no prefix specified in the |
| /// [CompletionRequest]. |
| final class NoPrefixMatcher extends CompletionMatcher { |
| @override |
| double score(String candidate) { |
| return 0; |
| } |
| } |
