private Type type(SymbolTable sym) throws ParseException {
start("type");
Type result = null;
if (lex.isIdentifier()) {
result = sym.lookupType(lex.tokenText());
lex.nextLex(); // we are a terminal, so call nextLex to setup next state
} else if (lex.match("^")) {
lex.nextLex();
result = new PointerType(type(sym));
} else if (lex.match("[")) {
lex.nextLex();
if (lex.tokenCategory() != Lexer.intToken)
throw new ParseException(32); // expected an integer
int lower = (new Integer(lex.tokenText()).intValue());
lex.nextLex();
if (!lex.match(":")) throw new ParseException(19); // needed to see :
lex.nextLex();
if (lex.tokenCategory() != Lexer.intToken)
throw new ParseException(32); // expected an integer
int upper = (new Integer(lex.tokenText()).intValue());
lex.nextLex();
if (!lex.match("]")) throw new ParseException(24); // should have seen ]
lex.nextLex();
result = sym.lookupType(lex.tokenText());
// type(sym); //might use this instead of nextLex();
// gotta advance so we are at next token
lex.nextLex();
result = new ArrayType(lower, upper, result);
} else {
throw new ParseException(30); // we expected a type name
}
stop("type");
return result;
}
