antlr.v4.runtime.FailedPredicateException source code

1 module antlr.v4.runtime.FailedPredicateException;
2 
3 import std.format;
4 import antlr.v4.runtime.RecognitionException;
5 import antlr.v4.runtime.Token;
6 import antlr.v4.runtime.Parser;
7 import antlr.v4.runtime.atn.ATNState;
8 import antlr.v4.runtime.atn.AbstractPredicateTransition;
9 import antlr.v4.runtime.atn.PredicateTransition;
10 
11 // Class FailedPredicateException
12 /**
13  * TODO add class description
14  */
15 class FailedPredicateException : RecognitionException
16 {
17 
18     private int ruleIndex;
19 
20     private int predicateIndex;
21 
22     private string predicate;
23 
24     public this(Parser recognizer)
25     {
26 	this(recognizer, null);
27     }
28 
29     public this(Parser recognizer, string predicate)
30     {
31         this(recognizer, predicate, null);
32     }
33 
34     public this(Parser recognizer, string predicate, string message)
35     {
36 	super(formatMessage(predicate, message), recognizer, recognizer.getInputStream(), recognizer.ctx_);
37         ATNState s = recognizer.getInterpreter().atn.states[recognizer.getState];
38 
39         AbstractPredicateTransition trans = cast(AbstractPredicateTransition)s.transition(0);
40         if (trans.classinfo == PredicateTransition.classinfo) {
41             this.ruleIndex = (cast(PredicateTransition)trans).ruleIndex;
42             this.predicateIndex = (cast(PredicateTransition)trans).predIndex;
43         }
44         else {
45             this.ruleIndex = 0;
46             this.predicateIndex = 0;
47         }
48 
49         this.predicate = predicate;
50         this.setOffendingToken(recognizer.getCurrentToken());
51 
52     }
53 
54     public int getRuleIndex()
55     {
56 	return ruleIndex;
57     }
58 
59     public int getPredIndex()
60     {
61         return predicateIndex;
62     }
63 
64     public string getPredicate()
65     {
66         return predicate;
67     }
68 
69     private static string formatMessage(string predicate, string message)
70     {
71         if (message !is null) {
72             return message;
73         }
74         return format("failed predicate: {%s}?", predicate);
75     }
76 
77 }