antlr.v4.runtime.atn.AtomTransition source code

1 /*
2  * [The "BSD license"]
3  *  Copyright (c) 2016 Terence Parr
4  *  Copyright (c) 2016 Sam Harwell
5  *  All rights reserved.
6  *
7  *  Redistribution and use in source and binary forms, with or without
8  *  modification, are permitted provided that the following conditions
9  *  are met:
10  *
11  *  1. Redistributions of source code must retain the above copyright
12  *     notice, this list of conditions and the following disclaimer.
13  *  2. Redistributions in binary form must reproduce the above copyright
14  *     notice, this list of conditions and the following disclaimer in the
15  *     documentation and/or other materials provided with the distribution.
16  *  3. The name of the author may not be used to endorse or promote products
17  *     derived from this software without specific prior written permission.
18  *
19  *  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20  *  IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21  *  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22  *  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24  *  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25  *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26  *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29  */
30 
31 module antlr.v4.runtime.atn.AtomTransition;
32 
33 import std.conv;
34 import antlr.v4.runtime.atn.Transition;
35 import antlr.v4.runtime.atn.ATNState;
36 import antlr.v4.runtime.atn.TransitionStates;
37 import antlr.v4.runtime.misc.IntervalSet;
38 
39 /**
40  * TODO add class description
41  */
42 class AtomTransition : Transition
43 {
44 
45     /**
46      * @uml
47      * The token type or character value; or, signifies special label.
48      */
49     public int _label;
50 
51     public this(ATNState target, int label)
52     {
53         super(target);
54         this._label = label;
55     }
56 
57     /**
58      * @uml
59      * @override
60      */
61     public override int getSerializationType()
62     {
63         return TransitionStates.ATOM;
64     }
65 
66     /**
67      * @uml
68      * @override
69      */
70     public override IntervalSet label()
71     {
72         return IntervalSet.of(_label);
73     }
74 
75     /**
76      * @uml
77      * @override
78      */
79     public override bool matches(int symbol, int minVocabSymbol, int maxVocabSymbol)
80     {
81         return _label == symbol;
82     }
83 
84     /**
85      * @uml
86      * @override
87      */
88     public override string toString()
89     {
90         return to!string(_label);
91     }
92 
93 }