Re: [Boost-users] [boost-users][bind] binding std::for_each

"Igor R" wrote in message news:cfe0a3cf0903031205u428d6a7at944b4fcd89001a64@mail.gmail.com...

Hello,

I'd like to bind std::for_each with some other functor created on the fly, like this:

struct A { void f(int, int); };

vector vec;

void f(function);

// I want to call f() with a functor that would call A::f for every element in vec

f(bind(&for_each, vec.begin(), vec.end(), bind(&A::f, _1, 1))); // doesn't compile

f(bind(&for_each, vec.begin(), vec.end(), protect(bind(&A::f, _1, 1)))); // also doesn't compile

Thank you.

As for_each is a template, to take its address you must pass template parameters. As bind return type is unspecified, you would have to wrap inner bind with function. Like this (didn't test): typedef function Inner; f(bind(&for_each, vec.begin(), vec.end(), Inner(bind(&A::f, _1, 1)))); And note that you should not write such way even if it works if you are going to make it portable between various STL implementetion, because for_each may take additional defaulted parameters. It is better just to express outer bind as an own class with operator(), not as bind.