ATNConfig class
A tuple: (ATN state, predicted alt, syntactic, semantic context). The syntactic context is a graph-structured stack node whose path(s) to the root is the rule invocation(s) chain used to arrive at the state. The semantic context is the tree of semantic predicates encountered before reaching an ATN state.
- Implementers
Constructors
- ATNConfig(ATNState state, int alt, PredictionContext? context, [SemanticContext semanticContext = EmptySemanticContext.Instance])
- ATNConfig.dup(ATNConfig c, {ATNState? state, int? alt, PredictionContext? context, SemanticContext? semanticContext})
Properties
- alt ↔ int
-
What alt (or lexer rule) is predicted by this configuration */
getter/setter pair
- context ↔ PredictionContext?
-
The stack of invoking states leading to the rule/states associated
with this config. We track only those contexts pushed during
execution of the ATN simulator.
getter/setter pair
- hashCode → int
-
The hash code for this object.
no setteroverride
- outerContextDepth → int
-
This method gets the value of the {@link #reachesIntoOuterContext} field
as it existed prior to the introduction of the
{@link #isPrecedenceFilterSuppressed} method.
no setter
- reachesIntoOuterContext ↔ int
-
We cannot execute predicates dependent upon local context unless
we know for sure we are in the correct context. Because there is
no way to do this efficiently, we simply cannot evaluate
dependent predicates unless we are in the rule that initially
invokes the ATN simulator.
getter/setter pair
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- semanticContext ↔ SemanticContext
-
getter/setter pair
- state ↔ ATNState
-
The ATN state associated with this configuration */
getter/setter pair
Methods
-
isPrecedenceFilterSuppressed(
) → bool -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
setPrecedenceFilterSuppressed(
bool value) → void -
toString(
[dynamic _, bool showAlt = true]) → String -
A string representation of this object.
override
Operators
-
operator ==(
Object other) → bool -
An ATN configuration is equal to another if both have
the same state, they predict the same alternative, and
syntactic/semantic contexts are the same.
override
Static Properties
- SUPPRESS_PRECEDENCE_FILTER → int
-
This field stores the bit mask for implementing the
{@link #isPrecedenceFilterSuppressed} property as a bit within the
existing {@link #reachesIntoOuterContext} field.
final