DecisionEventInfo class

This is the base class for gathering detailed information about prediction events which occur during parsing.

Note that we could record the parser call stack at the time this event occurred but in the presence of left recursive rules, the stack is kind of meaningless. It's better to look at the individual configurations for their individual stacks. Of course that is a PredictionContext object not a parse tree node and so it does not have information about the extent (start...stop) of the various subtrees. Examining the stack tops of all configurations provide the return states for the rule invocations. From there you can get the enclosing rule.

@since 4.3

Implementers

Constructors

DecisionEventInfo(int decision, ATNConfigSet? configs, TokenStream input, int startIndex, int stopIndex, bool fullCtx)

Properties

configs → ATNConfigSet?
The configuration set containing additional information relevant to the prediction state when the current event occurred, or null if no additional information is relevant or available.
final
decision → int
The invoked decision number which this event is related to.
final
fullCtx → bool
true if the current event occurred during LL prediction; otherwise, false if the input occurred during SLL prediction.
final
hashCode → int
The hash code for this object.
no setterinherited
input → TokenStream
The input token stream which is being parsed.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
startIndex → int
The token index in the input stream at which the current prediction was originally invoked.
final
stopIndex → int
The token index in the input stream at which the current event occurred.
final

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited