LL1Analyzer

LL1 Analyzer

class LL1Analyzer {

int HIT_PRED;

IntervalSet[] getDecisionLookahead(ATNState s);

IntervalSet LOOK(ATNState s, RuleContext ctx);

IntervalSet LOOK(ATNState s, ATNState stopState, RuleContext ctx);

void _LOOK(ATNState s, ATNState stopState, PredictionContext ctx, IntervalSet look, Array!ATNConfig* lookBusy, Array!bool* calledRuleStack, bool seeThruPreds, bool addEOF);

}

Constructors

this this(ATN atn): Undocumented in source.

Members

Functions

LOOK IntervalSet LOOK(ATNState s, RuleContext ctx): Compute set of tokens that can follow {@code s} in the ATN in the specified {@code ctx}.
LOOK IntervalSet LOOK(ATNState s, ATNState stopState, RuleContext ctx): Compute set of tokens that can follow {@code s} in the ATN in the specified {@code ctx}.
_LOOK void _LOOK(ATNState s, ATNState stopState, PredictionContext ctx, IntervalSet look, Array!ATNConfig* lookBusy, Array!bool* calledRuleStack, bool seeThruPreds, bool addEOF): Compute set of tokens that can follow {@code s} in the ATN in the specified {@code ctx}.
getDecisionLookahead IntervalSet[] getDecisionLookahead(ATNState s): Calculates the SLL(1) expected lookahead set for each outgoing transition if an {@link ATNState}. The returned array has one element for each outgoing transition in {@code s}. If the closure from transition <em>i</em> leads to a semantic predicate before matching a symbol, the element at index <em>i</em> of the result will be {@code null}.

Static variables

HIT_PRED int HIT_PRED;: Special value added to the lookahead sets to indicate that we hit a predicate during analysis if {@code seeThruPreds==false}.

Variables

atn ATN atn;: Undocumented in source.

Meta

Source

See Implementation

antlr v4 runtime atn LL1Analyzer modules