在一个容器中的每个元素调用成员函数 [英] Call member function on each element in a container

问题描述

这问题是风格问题，因为你总是可以写一个for循环或类似的东西;但是，有没有那么突兀STL或升压相当于写：

This question is a matter of style, since you can always write a for loop or something similar; however, is there a less obtrusive STL or BOOST equivalent to writing:

for (container<type>::iterator iter = cointainer.begin();
     iter != cointainer.end();
     iter++)
 iter->func();

喜欢的东西（想象的）这样的：

Something like (imagined) this:

call_for_each(container.begin(), container.end(), &Type::func);

我认为这将是1）少打字，2）更容易阅读，3）少变化，如果你决定改变基本类型/容器类型。

I think it would be 1) less typing, 2) easier to read, 3) less changes if you decided to change base type/container type.

编辑：
感谢您的帮助，现在，如果我想一些参数传递给成员函数是什么？

Thanks for your help, now, what if I wanted to pass some arguments to the member function?

推荐答案

我发现升压结合似乎是非常适合的任务，再加上你可以通过其他参数的方法：

I found out that boost bind seems to be well suited for the task, plus you can pass additional arguments to the method:

#include <iostream>
#include <functional>
#include <boost/bind.hpp>
#include <vector>
#include <algorithm>

struct Foo {
    Foo(int value) : value_(value) {
    }

    void func(int value) {
        std::cout << "member = " << value_ << " argument = " << value << std::endl;
    }

private:
    int value_;
};

int main() {
    std::vector<Foo> foo_vector;

    for (int i = 0; i < 5; i++)
        foo_vector.push_back(Foo(i));

    std::for_each(foo_vector.begin(), foo_vector.end(),
        boost::bind(&Foo::func, _1, 1));
}

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