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
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