protected int getTokenType(GrammarAST atom) {
int ttype;
if (g.isLexer()) {
ttype = CharSupport.getCharValueFromGrammarCharLiteral(atom.getText());
} else {
ttype = g.getTokenType(atom.getText());
}
return ttype;
}
public Handle _ruleRef(GrammarAST node) {
Rule r = g.getRule(node.getText());
if (r == null) {
g.tool.errMgr.toolError(ErrorType.INTERNAL_ERROR, "Rule " + node.getText() + " undefined");
return null;
}
RuleStartState start = atn.ruleToStartState[r.index];
ATNState left = newState(node);
ATNState right = newState(node);
RuleTransition call = new RuleTransition(start, r.index, right);
left.addTransition(call);
node.atnState = left;
return new Handle(left, right);
}
/**
* From set build single edge graph o->o-set->o. To conform to what an alt block looks like, must
* have extra state on left. This handles ~A also, converted to ~{A} set.
*/
public Handle set(GrammarAST associatedAST, List<GrammarAST> terminals, boolean invert) {
ATNState left = newState(associatedAST);
ATNState right = newState(associatedAST);
IntervalSet set = new IntervalSet();
for (GrammarAST t : terminals) {
int ttype = g.getTokenType(t.getText());
set.add(ttype);
}
if (invert) {
IntervalSet notSet = set.complement(Token.MIN_TOKEN_TYPE, g.getMaxTokenType());
left.addTransition(new NotSetTransition(right, set, notSet));
} else {
left.addTransition(new SetTransition(right, set));
}
associatedAST.atnState = left;
return new Handle(left, right);
}