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 // Singleton LexerMoreAction
15 /**
16  * Provides a singleton instance of this parameterless lexer action.
17  */
18 class LexerMoreAction : LexerAction
19 {
20 
21     /**
22      * The single instance of LexerMoreAction.
23      */
24     private static __gshared LexerMoreAction instance_;
25 
26     /**
27      * @uml
28      * {@inheritDoc}
29      *  @return This method returns {@link LexerActionType#MORE}.
30      * @safe
31      * @nothrow
32      */
33     public LexerActionType getActionType() @safe nothrow
34     {
35         return LexerActionType.MORE;
36     }
37 
38     public bool isPositionDependent()
39     {
40         return false;
41     }
42 
43     public void execute(InterfaceLexer lexer)
44     {
45         lexer.more();
46     }
47 
48     /**
49      * @uml
50      * @safe
51      * @nothrow
52      * @override
53      */
54     public override size_t toHash() @safe nothrow
55     {
56 	size_t hash = MurmurHash.initialize();
57         hash = MurmurHash.update(hash, Utils.rank(getActionType));
58         return MurmurHash.finish(hash, 1);
59     }
60 
61     /**
62      * @uml
63      * - @SuppressWarnings("EqualsWhichDoesntCheckParameterClass")
64      */
65     public bool equals(Object obj)
66     {
67         return obj == this;
68     }
69 
70     /**
71      * @uml
72      * @override
73      */
74     public override string toString()
75     {
76         return "more";
77     }
78 
79     /**
80      * Creates the single instance of LexerMoreAction.
81      */
82     private shared static this()
83     {
84         instance_ = new LexerMoreAction;
85     }
86 
87     /**
88      * Returns: A single instance of LexerMoreAction.
89      */
90     public static LexerMoreAction instance()
91     {
92         return instance_;
93     }
94 
95 }