Re: [boost] inert_bool

From: Daniel Wallin (dalwan01_at_[hidden])
Date: 2003-09-05 14:13:51

At 20:43 2003-09-05, Ed Brey wrote:
>Following is a bit of utility code that formalizes the safe implicit 
>boolean conversion idiom.  The idea behind the idiom is that a class 
>should be implicitly convertible to bool, but not to integer or pointer 
>types that can accidentally be misused.
><snip>
>This is why I didn't use a pointer to member, and why I used the 
>reinterpret_cast.  A pointer to non-member should be fine, AFAICT, since 
>the only implicit operation is subtraction with another pointer of the 
>same type, which is OK, since it has the same semantics as subtraction of 
>two bools anyway.

This has an implicit conversion to const void*.

---
Daniel Wallin