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| 1 // Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file | |
| 2 // for details. All rights reserved. Use of this source code is governed by a | |
| 3 // BSD-style license that can be found in the LICENSE file. | |
| 4 | |
| 5 import 'package:source_span/source_span.dart'; | |
| 6 | |
| 7 /// A token in a platform selector. | |
| 8 class Token { | |
| 9 /// The type of the token. | |
| 10 final TokenType type; | |
| 11 | |
| 12 /// The span indicating where this token came from. | |
| 13 /// | |
| 14 /// This is a [FileSpan] because the tokens are parsed from a single | |
| 15 /// continuous string, but the string itself isn't actually a file. It might | |
| 16 /// come from a statically-parsed annotation or from a parameter. | |
| 17 final FileSpan span; | |
| 18 | |
| 19 Token(this.type, this.span); | |
| 20 } | |
| 21 | |
| 22 /// A token representing an identifier. | |
| 23 class IdentifierToken implements Token { | |
| 24 final type = TokenType.identifier; | |
| 25 final FileSpan span; | |
| 26 | |
| 27 /// The name of the identifier. | |
| 28 final String name; | |
| 29 | |
| 30 IdentifierToken(this.name, this.span); | |
| 31 | |
| 32 String toString() => 'identifier "$name"'; | |
| 33 } | |
| 34 | |
| 35 /// An enumeration of types of tokens. | |
| 36 class TokenType { | |
| 37 /// A `(` character. | |
| 38 static const leftParen = const TokenType._("left paren"); | |
| 39 | |
| 40 /// A `)` character. | |
| 41 static const rightParen = const TokenType._("right paren"); | |
| 42 | |
| 43 /// A `||` sequence. | |
| 44 static const or = const TokenType._("or"); | |
| 45 | |
| 46 /// A `&&` sequence. | |
| 47 static const and = const TokenType._("and"); | |
| 48 | |
| 49 /// A `!` character. | |
| 50 static const not = const TokenType._("not"); | |
| 51 | |
| 52 /// A `?` character. | |
| 53 static const questionMark = const TokenType._("question mark"); | |
| 54 | |
| 55 /// A `:` character. | |
| 56 static const colon = const TokenType._("colon"); | |
| 57 | |
| 58 /// A named identifier. | |
| 59 static const identifier = const TokenType._("identifier"); | |
| 60 | |
| 61 /// The end of the selector. | |
| 62 static const endOfFile = const TokenType._("end of file"); | |
| 63 | |
| 64 /// The name of the token type. | |
| 65 final String name; | |
| 66 | |
| 67 const TokenType._(this.name); | |
| 68 | |
| 69 String toString() => name; | |
| 70 } | |
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Chromium Code Reviews
Issue 1717483002:
Make PlatformSelector use boolean_selector. (Closed)
Base URL: git@github.com:dart-lang/test@master