private ASMOclAny exp(StackFrame frame, ASMTuple args) throws IOException {
ASMOclAny ret = null;
Token t = null;
t = next();
if (t.type == Token.LPAREN) {
ret = exp(frame, args);
match(Token.RPAREN);
return ret;
} else if ((t.type == Token.STRING) || (t.type == Token.INT)) {
ret = convValue(t);
} else {
unread(t);
ret = simpleExp(frame, args);
}
t = next();
if (t.type == Token.PLUS) {
ASMOclAny right = exp(frame, args);
if (right == null) {
ret = null;
} else if (ret instanceof ASMInteger) {
ret = ASMInteger.operatorPlus(frame, (ASMInteger) ret, (ASMInteger) right);
} else if (ret instanceof ASMString) {
if (right instanceof ASMString) {
ret = ASMString.operatorPlus(frame, (ASMString) ret, (ASMString) right);
} else {
ret = ASMString.operatorPlus(frame, (ASMString) ret, new ASMString(right.toString()));
}
} else {
System.out.println("ERROR: could not add type " + ASMOclAny.oclType(frame, ret) + ".");
}
} else {
unread(t);
}
return ret;
}
