Checking if enum type value contains certain value

[Pavils Jurjans]

Hello,

Is there some short-gand way to check if the enum type value contains
certain value?

Ie, the talk here is about Regex object:

Regex re = new Regex(@"pattern", RegexOptions.IgnoreCase |
RegexOptions.Multiline);
if ((re.Options & RegexOptions.IgnoreCase) == RegexOptions.IgnoreCase) ...
do stuff ...

This "if" expression is rather lengthy, perhaps there is some shorter way to
check wether the value contains one of the ORed enum values?

Thanks,

Pavils

[Jon Skeet [C# MVP]]

Pavils Jurjans <pa****@mailbox.riga.lv> wrote:

Is there some short-gand way to check if the enum type value contains
certain value?

Ie, the talk here is about Regex object:

Regex re = new Regex(@"pattern", RegexOptions.IgnoreCase |
RegexOptions.Multiline);
if ((re.Options & RegexOptions.IgnoreCase) == RegexOptions.IgnoreCase) ...
do stuff ...

This "if" expression is rather lengthy, perhaps there is some shorter way to
check wether the value contains one of the ORed enum values?

Well, you don't need to check for equality - just "non-zeroness":

if ((re.Options & RegexOptions.IgnoreCase) != 0)

which is fairly straightforward.

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

[Pavils Jurjans]

Yes, that's true!

I was not aware that runtime will implicitly convert enum type to int so
that it can be compared to zero.

Thanks!

Pavils.

"Jon Skeet [C# MVP]" <sk***@pobox.com> wrote in message
news:MP************************@msnews.microsoft.c om...

Pavils Jurjans <pa****@mailbox.riga.lv> wrote:

Is there some short-gand way to check if the enum type value contains
certain value?

Ie, the talk here is about Regex object:

Regex re = new Regex(@"pattern", RegexOptions.IgnoreCase |
RegexOptions.Multiline);
if ((re.Options & RegexOptions.IgnoreCase) == RegexOptions.IgnoreCase) .... do stuff ...

This "if" expression is rather lengthy, perhaps there is some shorter way to check wether the value contains one of the ORed enum values?

Well, you don't need to check for equality - just "non-zeroness":

if ((re.Options & RegexOptions.IgnoreCase) != 0)

which is fairly straightforward.

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too