在lambda中使用静态方法时出错

I have a static method my_method_1() in my_class, and I am trying to use it in a lambda:

我在my_class中有一个静态方法my_method_1(),我试图在lambda中使用它:

static void my_method_1(el);

void my_class::my_method_2()
{
    std::for_each(my_list_.begin(), my_list_.end(),
        [](auto& element)
        {
            my_method_1(element);
        });
}

gcc6 gives me an error:

gcc6给了我一个错误:

'this' was not captured for this lambda function

这个lambda函数没有捕获'this'

In gcc4, it compiles.

在gcc4中,它编译。

2 个解决方案

#1

Cannot reproduce.

According the error ("error: ‘this’ was not captured for this lambda function") my_method_1() isn't static.

根据错误(“错误:'没有为此lambda函数捕获此'”)my_method_1()不是静态的。

If my_method_1() is a non-static method, you can use it inside a lambda capturing this by value (that is like capturing the object by reference); something like

如果my_method_1()是一个非静态方法,你可以在lambda中使用它来捕获这个值(就像通过引用捕获对象);就像是

 //  v <- capture by value 
    [=](auto& element)
     { my_method_1(element); }

If my_method_1() is really a static method, please prepare a minimal but complete example to reproduce your problem.

如果my_method_1()实际上是一个静态方法,请准备一个最小但完整的示例来重现您的问题。

#2

2 observations:

your function is static, you can refer to it as my_class::my_method_1()

你的函数是静态的,你可以将它称为my_class :: my_method_1()
You don't need to use a lambda here, have you tried this ?

你不需要在这里使用lambda,你试过这个吗?
```
void my_class::my_method_2()
{
    for (auto& element : my_list)
        my_method_1(element);
}
```

#1