public String toString() {
String tmp = new String();
ArrayList<Expression> args;
if (this.op == null) {
if (this instanceof Variable) {
tmp = ((Variable) this).getValue().toString();
if (this.flag != null && this.flag.equals(Flag.UMINUS)) tmp = "-" + tmp;
} else if (this instanceof FunctionCall) {
tmp = ((FunctionCall) this).getTag() + "(";
args = ((FunctionCall) this).getArgs();
for (int i = args.size() - 1; i >= 0; i--) tmp = tmp + args.get(i).toString() + ",";
tmp = tmp.substring(0, tmp.length() - 1) + ")";
}
} else {
String l = this.left.toString();
String r = this.right.toString();
if (this.priority) tmp = "( " + l + " " + op.getString() + " " + r + " )";
else tmp = l + " " + op.getString() + " " + r;
if (this.flag != null && this.flag.equals(Flag.UMINUS)) tmp = "-( " + tmp + " )";
}
return tmp;
}
