ATNConfig

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.

class ATNConfig {

static immutable

int SUPPRESS_PRECEDENCE_FILTER;

ATNState state;

int alt;

PredictionContext context;

int reachesIntoOuterContext;

SemanticContext semanticContext;

size_t function(Object o) @(trusted) nothrow hashOfFp;

bool function(Object a, Object b) opEqualsFp;

this(ATNConfig old);

this(ATNState state, int alt, PredictionContext context);

this(ATNState state, int alt, PredictionContext context, SemanticContext semanticContext);

this(ATNConfig c, ATNState state);

this(ATNConfig c, ATNState state, SemanticContext semanticContext);

this(ATNConfig c, SemanticContext semanticContext);

this(ATNConfig c, ATNState state, PredictionContext context);

this(ATNConfig c, ATNState state, PredictionContext context, SemanticContext semanticContext);

int getOuterContextDepth();

bool isPrecedenceFilterSuppressed();

void setPrecedenceFilterSuppressed(bool value);

bool opEquals(Object o);

bool opEquals(ATNConfig other);

size_t toHash();

string toString();

string toString(InterfaceRecognizer recog, bool showAlt);

}

Constructors

this this(ATNConfig old): Duplication
this this(ATNState state, int alt, PredictionContext context): Undocumented in source.
this this(ATNState state, int alt, PredictionContext context, SemanticContext semanticContext): Undocumented in source.
this this(ATNConfig c, ATNState state): Undocumented in source.
this this(ATNConfig c, ATNState state, SemanticContext semanticContext): Undocumented in source.
this this(ATNConfig c, SemanticContext semanticContext): Undocumented in source.
this this(ATNConfig c, ATNState state, PredictionContext context): Undocumented in source.
this this(ATNConfig c, ATNState state, PredictionContext context, SemanticContext semanticContext): Undocumented in source.

Members

Functions

getOuterContextDepth int getOuterContextDepth(): This method gets the value of the {@link #reachesIntoOuterContext} field as it existed prior to the introduction of the {@link #isPrecedenceFilterSuppressed} method.
isPrecedenceFilterSuppressed bool isPrecedenceFilterSuppressed(): Undocumented in source. Be warned that the author may not have intended to support it.
opEquals bool opEquals(Object o): 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. @uml @override
opEquals bool opEquals(ATNConfig other): Undocumented in source. Be warned that the author may not have intended to support it.
setPrecedenceFilterSuppressed void setPrecedenceFilterSuppressed(bool value): Undocumented in source. Be warned that the author may not have intended to support it.
toHash size_t toHash(): @uml @trusted @nothrow @override
toString string toString(): @uml @override
toString string toString(InterfaceRecognizer recog, bool showAlt): Undocumented in source. Be warned that the author may not have intended to support it.

Static variables

SUPPRESS_PRECEDENCE_FILTER int SUPPRESS_PRECEDENCE_FILTER;: This field stores the bit mask for implementing the {@link #isPrecedenceFilterSuppressed} property as a bit within the existing {@link #reachesIntoOuterContext} field.

Variables

alt int alt;: What alt (or lexer rule) is predicted by this configuration?
context PredictionContext context;: 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.
hashOfFp size_t function(Object o) @(trusted) nothrow hashOfFp;: Undocumented in source.
opEqualsFp bool function(Object a, Object b) opEqualsFp;: Undocumented in source.
reachesIntoOuterContext int reachesIntoOuterContext;: 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.
semanticContext SemanticContext semanticContext;: Undocumented in source.
state ATNState state;: The ATN state associated with this configuration.