Easiest way to flip a boolean value?

Question

I just want to flip a boolean based on what it already is. If it\'s true - make it false. If it\'s false - make it true.

Here is my code excerpt:

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Answer 1

Clearly you need a flexible solution that can support types masquerading as boolean. The following allows for that:

template    bool Flip(const T& t);

You can then specialize this for different types that might pretend to be boolean. For example:

template<>  bool Flip(const bool& b)  { return !b; }
template<>  bool Flip(const int& i)    { return !(i == 0); }

An example of using this construct:

if(Flip(false))  { printf("flipped false\n"); }
if(!Flip(true))  { printf("flipped true\n"); }

if(Flip(0))  { printf("flipped 0\n"); }
if(!Flip(1)) { printf("flipped 1\n"); }

No, I'm not serious.