antlr.v4.runtime.atn.LexerMoreAction source code

1 /*
2  * Copyright (c) 2012-2018 The ANTLR Project. All rights reserved.
3  * Use of this file is governed by the BSD 3-clause license that
4  * can be found in the LICENSE.txt file in the project root.
5  */
6 
7 module antlr.v4.runtime.atn.LexerMoreAction;
8 
9 import antlr.v4.runtime.InterfaceLexer;
10 import antlr.v4.runtime.atn.LexerAction;
11 import antlr.v4.runtime.atn.LexerActionType;
12 import antlr.v4.runtime.misc;
13 
14 /**
15  * Provides a singleton instance of this parameterless lexer action.
16  */
17 class LexerMoreAction : LexerAction
18 {
19 
20     /**
21      * The single instance of LexerMoreAction.
22      */
23     private static __gshared LexerMoreAction instance_;
24 
25     /**
26      * @uml
27      * {@inheritDoc}
28      *  @return This method returns {@link LexerActionType#MORE}.
29      * @safe
30      * @nothrow
31      */
32     public LexerActionType getActionType() @safe nothrow
33     {
34         return LexerActionType.MORE;
35     }
36 
37     public bool isPositionDependent()
38     {
39         return false;
40     }
41 
42     public void execute(InterfaceLexer lexer)
43     {
44         lexer.more();
45     }
46 
47     /**
48      * @uml
49      * @safe
50      * @nothrow
51      * @override
52      */
53     public override size_t toHash() @safe nothrow
54     {
55 	size_t hash = MurmurHash.initialize();
56         hash = MurmurHash.update(hash, Utils.rank(getActionType));
57         return MurmurHash.finish(hash, 1);
58     }
59 
60     /**
61      * @uml
62      * - @SuppressWarnings("EqualsWhichDoesntCheckParameterClass")
63      */
64     public bool equals(Object obj)
65     {
66         return obj == this;
67     }
68 
69     /**
70      * @uml
71      * @override
72      */
73     public override string toString()
74     {
75         return "more";
76     }
77 
78     /**
79      * Creates the single instance of LexerMoreAction.
80      */
81     private shared static this()
82     {
83         instance_ = new LexerMoreAction;
84     }
85 
86     /**
87      * Returns: A single instance of LexerMoreAction.
88      */
89     public static LexerMoreAction instance()
90     {
91         return instance_;
92     }
93 
94 }