With a standard enum, values are automatically assigned.
public enum MyEnum{Happy,Sa d,Angry,Grandpa };
....but what about a bitflag enum?
[Flags()]
public enum MyEnum:int{
FalseTeeth=0x00 000001
BrainCancer=0x0 0000002
CronesDisease=0 x00000004
AllDiseasesAndP roblems=0xfffff fff
}
In this example, is it necessary for me to manually assign the values to
'FalseTeeth', 'BrainCancer', and 'CronesDisease' or does the compiler do
this for me automatically? For small enums, I don't really mind the
inconvenience of manually typing the associated bitvalues. However, it's
more of a pain for larger enums -- especially when I need to insert an item
in the enum at some later time and all of the bitflag values must be
adjusted.
--
Sincerely,
David Sworder http://www.CodeFanatic.com 4 1608
David Sworder wrote: With a standard enum, values are automatically assigned.
public enum MyEnum{Happy,Sa d,Angry,Grandpa };
...but what about a bitflag enum?
[Flags()] public enum MyEnum:int{ FalseTeeth=0x00 000001 BrainCancer=0x0 0000002 CronesDisease=0 x00000004 AllDiseasesAndP roblems=0xfffff fff }
In this example, is it necessary for me to manually assign the values to 'FalseTeeth', 'BrainCancer', and 'CronesDisease' or does the compiler do this for me automatically? For small enums, I don't really mind the inconvenience of manually typing the associated bitvalues. However, it's more of a pain for larger enums -- especially when I need to insert an item in the enum at some later time and all of the bitflag values must be adjusted.
The bitflag attribute does not change the way values are assigned to the
various enum members. You'll need to explicitly set the values for your
bitmap enums.
--
mikeb
David Sworder wrote: With a standard enum, values are automatically assigned.
public enum MyEnum{Happy,Sa d,Angry,Grandpa };
...but what about a bitflag enum?
test it.
Answer: no, they are enumerated 0, 1, 2, 3 ... which isn't helpful. You
need to do the assignments manually.
[Flags()] public enum MyEnum:int{ FalseTeeth=0x00 000001 BrainCancer=0x0 0000002 CronesDisease=0 x00000004 AllDiseasesAndP roblems=0xfffff fff }
The leading '0's are not necessary. Leave them out. That would save you
some work at least.
--
Konrad - http://madrat.net/
> test it. Answer: no, they are enumerated 0, 1, 2, 3 ...
Yeah, I noticed that.... that's why I was hoping that I was missing
something. I thought maybe I was misusing the Flags() attribute.... ok,
well, thanks for the clarification.
Hi David,
"David Sworder" <ds******@cts.c om> wrote in message
news:OR******** ******@TK2MSFTN GP10.phx.gbl... With a standard enum, values are automatically assigned.
public enum MyEnum{Happy,Sa d,Angry,Grandpa };
...but what about a bitflag enum?
[Flags()] public enum MyEnum:int{ FalseTeeth=0x00 000001 BrainCancer=0x0 0000002 CronesDisease=0 x00000004 AllDiseasesAndP roblems=0xfffff fff }
In this example, is it necessary for me to manually assign the values
to 'FalseTeeth', 'BrainCancer', and 'CronesDisease' or does the compiler do this for me automatically? For small enums, I don't really mind the inconvenience of manually typing the associated bitvalues. However, it's more of a pain for larger enums -- especially when I need to insert an
item in the enum at some later time and all of the bitflag values must be adjusted.
For larger enums, you *might* find something like this easier:
[Flags()]
public enum MyEnum
{
FalseTeeth = 1,
BrainCancer = FalseTeeth << 1,
CronesDisease = BrainCancer << 1,
AllDiseasesAndP roblems = FalseTeeth|Brai nCancer|CronesD isease
}
Regards,
Daniel This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
by: David Sworder |
last post by:
With a standard enum, values are automatically assigned.
public enum MyEnum{Happy,Sad,Angry,Grandpa};
....but what about a bitflag enum?
public enum MyEnum:int{
FalseTeeth=0x00000001
BrainCancer=0x00000002
|
by: Steven T. Hatton |
last post by:
Any opinions or comments on the following? I don't say it below, but I came
out on the side of using enumerations over static constants.
/* I'm trying to figure out the pros and cons of using static const
* int class members as opposed to using enumerations to accomplish a
* similar goal. The use of static constants seems more explicit and
* obvious to me. Unless I assign values to the enumerators, the
* compiler will do it for me....
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by: DJTB |
last post by:
Dear Group,
I'd like to check if a value is defined in an enum.
Example:
------------------------------------------------------
typedef enum
{
A_VALUE = 1,
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simply look up the enum member in the expected type.
wouldn't that be easier and simpler? I see not technical reason for that
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by: Simon |
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Hi all,
I think I've seen someone passing an emumeration in code before.
Can anyone tell me if thats possible and why i would want to.
Many thanks
Kindest Regards
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Is it possible to bind a switch statement to an Enum such that a compile-time
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Example:
public enum MyEnum
{
one, two, three, four
}
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Hi!
I have created an enum list like this:
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{
This = 2,
That,
NewVal = 10,
LastItm
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What is the recommended way to loop over all enum values of a certain enum type?
Consider the following definition:
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then
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by: Steven Nagy |
last post by:
So I was needing some extra power from my enums and implemented the
typesafe enum pattern.
And it got me to thinking... why should I EVER use standard enums?
There's now a nice little code snippet that I wrote today that gives me
an instant implementation of the pattern. I could easily just always
use such an implementation instead of a standard enum, so I wanted to
know what you experts all thought.
Is there a case for standard enums?
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