protected void nil() throws ParseException {
if (fInput.getInputSExpression() instanceof Symbol) {
if (!fInput.getInputSExpression().isNil()) {
error("NIL or lambda list expected", fInput.getInputSExpression());
}
}
}
protected void keywordParam() throws ParseException {
if (!fInput.hasNext()) return;
if (fInput.next().getTyp() == TSExpression.SYMBOL) {
Symbol symbol = (Symbol) fInput.current();
if (symbol.getSymbolName().equalsIgnoreCase(TOKEN_KEY)) {
while (true) {
if (!fInput.hasNext()) {
break;
}
SExpression next = fInput.next();
if (isSpecialSymbol(next)) {
fInput.pushBack();
break;
}
addKey(varInit(next));
}
allowOtherKeys();
} else {
fInput.pushBack();
}
} else {
error("Unknown symbol in key list: &key expected", fInput.getInputSExpression());
}
}
private Symbol readRestOrBodySymbol(final String bodyRest) throws ParseException {
if (!fInput.hasNext()) {
error(bodyRest + " symbol expected", fInput.getInputSExpression());
}
SExpression symbol = fInput.next();
if (symbol.getTyp() == TSExpression.SYMBOL && !isSpecialSymbol(symbol)) { // echtes symbol
return (Symbol) symbol;
}
error(bodyRest + " symbol expected", symbol);
return null; // wird nie erreicht
}
private void errorWrongOrder() throws ParseException {
error(
"Wrong order of & parameters, order is: &optional &rest or &body &key",
fInput.getInputSExpression());
}