antlr.v4.runtime.atn.LexerTypeAction source code

1 module antlr.v4.runtime.atn.LexerTypeAction;
2 
3 import std.format;
4 import antlr.v4.runtime.InterfaceLexer;
5 import antlr.v4.runtime.atn.LexerAction;
6 import antlr.v4.runtime.atn.LexerActionType;
7 import antlr.v4.runtime.misc.MurmurHash;
8 import antlr.v4.runtime.misc.Utils;
9 
10 // Class LexerTypeAction
11 /**
12  * @uml
13  * Implements the {@code type} lexer action by calling {@link Lexer#setType}
14  * with the assigned type.
15  */
16 class LexerTypeAction : LexerAction
17 {
18 
19     private int type;
20 
21     /**
22      * @uml
23      * Constructs a new {@code type} action with the specified token type value.
24      *  @param type The type to assign to the token using {@link Lexer#setType}.
25      */
26     public this(int type)
27     {
28         this.type = type;
29     }
30 
31     /**
32      * @uml
33      * Gets the type to assign to a token created by the lexer.
34      *  @return The type to assign to a token created by the lexer.
35      */
36     public int getType()
37     {
38         return type;
39     }
40 
41     /**
42      * @uml
43      * {@inheritDoc}
44      *  @return This method returns {@link LexerActionType#TYPE}.
45      * @safe
46      * @nothrow
47      */
48     public LexerActionType getActionType() @safe nothrow
49     {
50         return LexerActionType.TYPE;
51 
52     }
53 
54     /**
55      * @uml
56      * {@inheritDoc}
57      *  @return This method returns {@code false}.
58      */
59     public bool isPositionDependent()
60     {
61         return false;
62     }
63 
64     /**
65      * @uml
66      * {@inheritDoc}
67      *
68      *  <p>This action is implemented by calling {@link Lexer#setType} with the
69      * value provided by {@link #getType}.</p>
70      */
71     public void execute(InterfaceLexer lexer)
72     {
73         lexer.setType(type);
74     }
75 
76     /**
77      * @uml
78      * @safe
79      * @nothrow
80      * @override
81      */
82     public override size_t toHash() @safe nothrow
83     {
84         size_t hash = MurmurHash.initialize();
85         hash = MurmurHash.update(hash, Utils.rank(getActionType));
86         hash = MurmurHash.update(hash, type);
87         return MurmurHash.finish(hash, 2);
88     }
89 
90     public bool equals(Object obj)
91     {
92         if (obj == this) {
93             return true;
94         }
95         else if (obj.classinfo != LexerTypeAction.classinfo) {
96             return false;
97         }
98         return type == (cast(LexerTypeAction)obj).type;
99     }
100 
101     /**
102      * @uml
103      * @override
104      */
105     public override string toString()
106     {
107         return format("type(%d)", type);
108     }
109 
110 }