枚举值 [英] Enumeration values
问题描述
这更像是一个C ++问题，但我想它同样适用于C＃。
有没有办法声明一个枚举，其中分配给字段的值是
增加了一些而不是1.
我想要做的是创建一个枚举，其中变量增加
一些公式而不仅仅是1.我怀疑这是可能的，但它会是
很好
基本上我要做的就是
enum E
{
A = StartValue，
B = 1 * 4 + A，
C = 2 * 4 + A，
D = 3 * 4 + A
}
这是我正在努力oop一些以特定的方式打包的标志
方式（不在我的控制之下，但完成了我的微软...参见
http://msdn2.microsoft.com/en-us/library/ms902086.aspx ）
如果我能以某种方式自动让编译器做到这一点，那就更好了。
数学如此
enum E
{
A = StartValue，
B，
C，
D
}
它给出了正确的价值。
我肯定没有办法做到这一点但是我想我会问（我想我可以
写一个预处理器，但这需要很多工作。
谢谢，
Jon
This is more of a C++ question but I guess it applies equally well to C#.
Is there a way to declare an enum where the values assigned to the fields is
incremented by something rather than 1.
What I would like to do is create an enum where the varaibles increment by
some formula rather than just 1. I doubt this is possible but it would be
nice
Essentially what I''m having to do is
enum E
{
A = StartValue,
B = 1 * 4 + A,
C = 2 * 4 + A,
D = 3 * 4 + A
}
This is be I''m trying to "oop" some flags that are packed in a specific
way(not under my control but done my microsoft... see
http://msdn2.microsoft.com/en-us/library/ms902086.aspx)
It would just be nicer if I could somehow automatically have the compiler do
the math so
enum E
{
A = StartValue,
B,
C,
D
}
and it give the right values.
I''m sure theres no way to do this but I thought I would ask(I guess I could
write a pre-processor but thats to much work.
Thanks,
Jon
推荐答案
Jon Slaughter< Jo *********** @ Hotmail.comwrote：
Jon Slaughter <Jo***********@Hotmail.comwrote:
这更像是一个C ++问题，但我想它同样适用于C＃。
是有一种方法来声明一个枚举，其中分配给字段的值是
增加了一些而不是1.
This is more of a C++ question but I guess it applies equally well to C#.
Is there a way to declare an enum where the values assigned to the fields is
incremented by something rather than 1.
不，我不喜欢不相信。说实话，它会被充分利用
很少，我认为这不会证明
语言的额外复杂性。
一个例外是Flags枚举。我希望当我宣布
枚举
[标志]
公共枚举值
{
Foo，
酒吧，
Baz
}
它会自动使用1,2和4。不幸的是你必须手动完成
- 这是一种使用非常广泛的模式。
-
Jon Skeet - < sk *** @ pobox.com>
http：/ /www.pobox.com/~skeet 博客： http：// www .msmvps.com / jon.skeet
如果回复小组，请不要给我发邮件
No, I don''t believe so. To be honest, it would be used sufficiently
rarely that I don''t think it would justify the extra complexity in the
language.
The one exception to that is Flags enums. I wish when I declared an
enum of
[Flags]
public enum Values
{
Foo,
Bar,
Baz
}
it would use 1, 2 and 4 automatically. Unfortunately you''ve got to do
it manually - and this is a very widely used pattern.
--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
If replying to the group, please do not mail me too
你好工作
基本上我要做的就是
enum E
{
A = StartValue，
B = 1 * 4 + A，
C = 2 * 4 + A，
D = 3 * 4 +一个
}
你想要的更多
" Jon Slaughter"写道：
Hi it will work
Essentially what I''m having to do is
enum E
{
A = StartValue,
B = 1 * 4 + A,
C = 2 * 4 + A,
D = 3 * 4 + A
}
what u want more
"Jon Slaughter" wrote:
这更像是一个C ++问题，但我想它同样适用于C＃。
有没有声明枚举的方式，分配给字段的值是
增加的东西而不是1.
我想要做的是创建一个枚举一些公式而不仅仅是1.增加了一些公式，而不仅仅是1.我怀疑这是可能的但是它会是
很好
基本上我要做的就是
enum E
{
A = StartValue，
B = 1 * 4 + A，
C = 2 * 4 + A，
D = 3 * 4 + A
这是我想要的oop一些以特定的方式打包的标志
方式（不在我的控制之下，但完成了我的微软...参见
http://msdn2.microsoft.com/en-us/library/ms902086.aspx ）
如果我能以某种方式自动让编译器做到这一点，那就更好了。
数学如此
enum E
{
A = StartValue，
B，
C，
D
}
它给出了正确的价值。
我肯定没有办法做到这一点但是我想我会问（我想我可以
写一个预处理器，但这需要很多工作。
谢谢，
Jon
This is more of a C++ question but I guess it applies equally well to C#.
Is there a way to declare an enum where the values assigned to the fields is
incremented by something rather than 1.
What I would like to do is create an enum where the varaibles increment by
some formula rather than just 1. I doubt this is possible but it would be
nice
Essentially what I''m having to do is
enum E
{
A = StartValue,
B = 1 * 4 + A,
C = 2 * 4 + A,
D = 3 * 4 + A
}
This is be I''m trying to "oop" some flags that are packed in a specific
way(not under my control but done my microsoft... see
http://msdn2.microsoft.com/en-us/library/ms902086.aspx)
It would just be nicer if I could somehow automatically have the compiler do
the math so
enum E
{
A = StartValue,
B,
C,
D
}
and it give the right values.
I''m sure theres no way to do this but I thought I would ask(I guess I could
write a pre-processor but thats to much work.
Thanks,
Jon
9月23日晚上11点35分，Jon Skeet [C＃MVP]< sk ... @ pobox.comwrote：
On Sep 23, 11:35 pm, Jon Skeet [C# MVP] <sk...@pobox.comwrote:
>
不，我不相信。说实话，它会被使用很少
很少我不认为这会证明
语言的额外复杂性。
>
No, I don''t believe so. To be honest, it would be used sufficiently
rarely that I don''t think it would justify the extra complexity in the
language.
Jon你真的很讨厌Enums我注意到了。就像我讨厌嵌套类一样。
特别是在最后一个帖子之后，我学会了''嵌套类
就像拔牙一样。大声笑。努力学习。
RL
Jon you really hate Enums I notice. Just like I hate nested classes.
Especially after that last thread, where I ''learned'' nested classes
like pulling teeth. LOL. Learning the hard way.
RL
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