[boost] indirecter_unary, indirecter_binary

From: Matthias Kaeppler (nospam_at_[hidden])
Date: 2005-03-06 12:45:13

Hello,

because of the lack of a generic adaptor which indirects operations on 
pointers to the pointees, i.e. sorting a collection of pointers with 
predicates applying to the pointees, I have come up with two classes, 
indirecter_unary and indirecter_binary which do exactly that (thanks 
again to the people from boost users and comp.lang.c++ for assisting 
me). Both adaptors accept adaptable function objects as well as plain 
functions.

Ex.:

inline int plus( int a, int b )
{
     return a + b;
}

// ...

std::vector<int> vec;
// ...
std::sort(vec.begin(),vec.end(),indirect_binary(std::less<int>()));
// ...
std::transform(vec.begin(),vec.end(),vec.begin(),std::ostream_iterator<int>(std::cout,"\n"),indirect_binary(plus));

I have attached the source file.

Your feedback would be greatly appreciated.

-- 
Matthias Kaeppler