> Considering this is C, there is no way to prevent this easily since you can't express a type that is one-way convertible (i.e. sds -> char* ok, char* -> sds n

> Considering this is C, there is no way to prevent this easily since you can't express a type that is one-way convertible (i.e. sds -> char* ok, char* -> sds not ok). typedef struct { char *s; } sds_t; will produce an error if you try to pass a char* instead. http://codepad.org/CmrskN9n http://codepad.org/CmrskN9n