private Expr buildLookaheadWithAmountCondition(
String symbol,
GExpansion expansion,
int amount,
NodeList<FormalParameter> params,
NodeList<Expr> args) {
String matchMethodName = "match" + symbol + "_lookahead" + incrementCount(symbol);
NodeList<Stmt> stmts =
buildLookaheadWithAmountCondition(
Collections.singletonList(expansion.location()), 0, amount, params, args);
stmts = stmts.append(returnStmt().withExpr(FAILED_LOOKAHEAD));
createMatchMethod(symbol, matchMethodName, expansion, stmts, emptyList());
return binaryExpr(
matchMethodCall(matchMethodName, literalExpr(0), emptyList()),
BinaryOp.NotEqual,
FAILED_LOOKAHEAD);
}
private List<String> firstTerminalsOf(GExpansion expansion) {
GContinuations c = new GContinuations(expansion.location(), productions, false);
c.next();
return c.terminals();
}