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Issue 1400473008: Roll Observatory packages and add a roll script (Closed) Base URL: git@github.com:dart-lang/observatory_pub_packages.git@master
Patch Set: Created 5 years, 2 months ago
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1 // Copyright (c) 2014, 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 library yaml.token;
6
7 import 'package:source_span/source_span.dart';
8
9 import 'style.dart';
10
11 /// A token emitted by a [Scanner].
12 class Token {
13 /// The token type.
14 final TokenType type;
15
16 /// The span associated with the token.
17 final FileSpan span;
18
19 Token(this.type, this.span);
20
21 String toString() => type.toString();
22 }
23
24 /// A token representing a `%YAML` directive.
25 class VersionDirectiveToken implements Token {
26 get type => TokenType.VERSION_DIRECTIVE;
27 final FileSpan span;
28
29 /// The declared major version of the document.
30 final int major;
31
32 /// The declared minor version of the document.
33 final int minor;
34
35 VersionDirectiveToken(this.span, this.major, this.minor);
36
37 String toString() => "VERSION_DIRECTIVE $major.$minor";
38 }
39
40 /// A token representing a `%TAG` directive.
41 class TagDirectiveToken implements Token {
42 get type => TokenType.TAG_DIRECTIVE;
43 final FileSpan span;
44
45 /// The tag handle used in the document.
46 final String handle;
47
48 /// The tag prefix that the handle maps to.
49 final String prefix;
50
51 TagDirectiveToken(this.span, this.handle, this.prefix);
52
53 String toString() => "TAG_DIRECTIVE $handle $prefix";
54 }
55
56 /// A token representing an anchor (`&foo`).
57 class AnchorToken implements Token {
58 get type => TokenType.ANCHOR;
59 final FileSpan span;
60
61 /// The name of the anchor.
62 final String name;
63
64 AnchorToken(this.span, this.name);
65
66 String toString() => "ANCHOR $name";
67 }
68
69 /// A token representing an alias (`*foo`).
70 class AliasToken implements Token {
71 get type => TokenType.ALIAS;
72 final FileSpan span;
73
74 /// The name of the anchor.
75 final String name;
76
77 AliasToken(this.span, this.name);
78
79 String toString() => "ALIAS $name";
80 }
81
82 /// A token representing a tag (`!foo`).
83 class TagToken implements Token {
84 get type => TokenType.TAG;
85 final FileSpan span;
86
87 /// The tag handle.
88 final String handle;
89
90 /// The tag suffix, or `null`.
91 final String suffix;
92
93 TagToken(this.span, this.handle, this.suffix);
94
95 String toString() => "TAG $handle $suffix";
96 }
97
98 /// A tkoen representing a scalar value.
99 class ScalarToken implements Token {
100 get type => TokenType.SCALAR;
101 final FileSpan span;
102
103 /// The contents of the scalar.
104 final String value;
105
106 /// The style of the scalar in the original source.
107 final ScalarStyle style;
108
109 ScalarToken(this.span, this.value, this.style);
110
111 String toString() => "SCALAR $style \"$value\"";
112 }
113
114 /// An enum of types of [Token] object.
115 class TokenType {
116 static const STREAM_START = const TokenType._("STREAM_START");
117 static const STREAM_END = const TokenType._("STREAM_END");
118
119 static const VERSION_DIRECTIVE = const TokenType._("VERSION_DIRECTIVE");
120 static const TAG_DIRECTIVE = const TokenType._("TAG_DIRECTIVE");
121 static const DOCUMENT_START = const TokenType._("DOCUMENT_START");
122 static const DOCUMENT_END = const TokenType._("DOCUMENT_END");
123
124 static const BLOCK_SEQUENCE_START = const TokenType._("BLOCK_SEQUENCE_START");
125 static const BLOCK_MAPPING_START = const TokenType._("BLOCK_MAPPING_START");
126 static const BLOCK_END = const TokenType._("BLOCK_END");
127
128 static const FLOW_SEQUENCE_START = const TokenType._("FLOW_SEQUENCE_START");
129 static const FLOW_SEQUENCE_END = const TokenType._("FLOW_SEQUENCE_END");
130 static const FLOW_MAPPING_START = const TokenType._("FLOW_MAPPING_START");
131 static const FLOW_MAPPING_END = const TokenType._("FLOW_MAPPING_END");
132
133 static const BLOCK_ENTRY = const TokenType._("BLOCK_ENTRY");
134 static const FLOW_ENTRY = const TokenType._("FLOW_ENTRY");
135 static const KEY = const TokenType._("KEY");
136 static const VALUE = const TokenType._("VALUE");
137
138 static const ALIAS = const TokenType._("ALIAS");
139 static const ANCHOR = const TokenType._("ANCHOR");
140 static const TAG = const TokenType._("TAG");
141 static const SCALAR = const TokenType._("SCALAR");
142
143 final String name;
144
145 const TokenType._(this.name);
146
147 String toString() => name;
148 }
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