无法看到编译器如何使用他为我的闭包创建的类

发布于 2024-12-14 02:32:55 字数 974 浏览 0 评论 0原文

我编写了这个非常基本的程序来检查编译器在幕后做了什么：

class Program
{
    static void Main(string[] args)
    {
        var increase = Increase();
        Console.WriteLine(increase());
        Console.WriteLine(increase());
        Console.ReadLine();
    }

    static Func<int> Increase()
    {
        int counter = 0;
        return () => counter++;
    }
}

现在，当我使用 Reflector 查看代码时，我确实看到编译器为我的闭包生成了一个类，如下所示：

[CompilerGenerated]
private sealed class <>c__DisplayClass1
{
    // Fields
    public int counter;

    // Methods
    public int <Increase>b__0()
    {
        return this.counter++;
    }
}

很好，我知道他需要这样做来处理我的关闭。然而，我看不到他实际上是如何使用这个类的。我的意思是我应该能够在某处找到实例化“<>c__DisplayClass1”的代码，我错了吗？

编辑

如果我点击增加方法，它看起来像这样：

private static Func<int> Increase()
{
    int counter = 0;
    return delegate {
        return counter++;
    };
}

原文

I wrote this very basic programm to examine what the compiler is doing behind the scenes:

class Program
{
    static void Main(string[] args)
    {
        var increase = Increase();
        Console.WriteLine(increase());
        Console.WriteLine(increase());
        Console.ReadLine();
    }

    static Func<int> Increase()
    {
        int counter = 0;
        return () => counter++;
    }
}

Now when I look at the code with Reflector I do see that the compiler generates a class for my closure like that:

[CompilerGenerated]
private sealed class <>c__DisplayClass1
{
    // Fields
    public int counter;

    // Methods
    public int <Increase>b__0()
    {
        return this.counter++;
    }
}

That's fine and I'm aware that he needs to do that to handle my closure. However, what I can't see is how he is actually using this class. I mean I should be able to find code that instantiates "<>c__DisplayClass1" somewhere, am I wrong?

EDIT

If I click on the increase method it looks like that:

private static Func<int> Increase()
{
    int counter = 0;
    return delegate {
        return counter++;
    };
}

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鲜血染红嫁衣 2024-12-21 02:32:55

您应该在 Increase 方法中找到它，我希望该方法具有如下实现：

// Not actually valid C# code because of the names...
static Func<int> Increase()
{
    <>c__DisplayClass1 closure = new c__DisplayClass1();
    closure.counter = 0;
    return new Func<int>(closure.<Increase>b__0);
}

除非您关闭其优化，否则 Reflector 不会向您显示该代码，但它应该在那里。要么关闭Reflector的优化，要么使用ildasm。

You should find it in the Increase method, which I'd expect to have an implementation along these lines:

// Not actually valid C# code because of the names...
static Func<int> Increase()
{
    <>c__DisplayClass1 closure = new c__DisplayClass1();
    closure.counter = 0;
    return new Func<int>(closure.<Increase>b__0);
}

Reflector won't show you that code unless you turn off its optimization, but it should be there. Either turn off Reflector's optimization, or use ildasm.

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