The title is misleading. Their "error codes" are not simple C error codes but are rather structs which they are dynamically allocating upon error occurence. T

The title is misleading. Their "error codes" are not simple C error codes but are rather structs which they are dynamically allocating upon error occurence. Their "create_error" function below is very inefficient compared to using traditional int error codes with a lookup table for the messages. struct Error* create_error(const char *msg) { struct Error *e = malloc(sizeof(struct Error)); e->msg = strdup(msg); return e; }