Re: [Boost-users] Bimap compare function

Subject: Re: [Boost-users] Bimap compare function
From: Nathan Ridge (zeratul976_at_[hidden])
Date: 2012-05-04 23:38:28

> I noticed that the comparator for a bimap can only be a Functor Type.  
> It does not appear that I can pass a function object or a function  
> pointer, as a STL Set would allow. Is this correct or did I miss  
> something. For my application I could really use the ability to pass in  
> comparator which is decided at runtime. Does anyone have any  
> suggestions on a work around? 

I'm not familiar with bimap, but is there a reason you can't wrap a 
function pointer (that can change at runtime) in a functor? Something
like:

typedef int (*function_type)(int);

struct my_functor
{
    function_type f;  // change this at runtime
    
    int operator()(int i)
    {
        return f(i);
    }
};

Regards,
Nate