为什么编译器将 bool 转换为整数并返回 bool 而不是返回 bool 本身?

Why does the compiler convert bool to integer and back to bool instead of returning the bool itself?

我正在通过 ILSPY 从 AForge.Video.FFMPEG 汇编中读取 VideoFileWriter class(我有兴趣了解特定方法的工作原理)并发现了这个:

public bool IsOpen {
    [return: MarshalAs(UnmanagedType.U1)]
    get {
        return ((this.data != null) ? 1 : 0) != 0;
    }
}

为什么要将 bool 转换为整数而不是返回 bool 而只是 this.data != null

这是反编译代码,可能只是反编译器的一个小故障。


经过一番思考,这里有一个合理的实现,可能会变成相同的编译代码

public enum ConnectionState
{
    Closed = 0,
    Open = 1,
    Opening = 2,
    OtherStuff = 3,
    AndSoOn = 4,
}

public bool IsOpen
{
    get
    {
        ConnectionState state;
        if (this.data != null)
        {
            state = ConnectionState.Open;
        }
        else
        {
            state = ConnectionState.Closed;
        }

        return state != ConnectionState.Closed;
    }
}