[MUD-Dev] Re: Question on c++ switch optimization, and parsers i

Jon A. Lambert jlsysinc at ix.netcom.com
Mon Feb 8 00:55:53 New Zealand Daylight Time 1999


On  7 Feb 99, Ben Greear wrote:
> 
> Basically, I'll have a bunch of classes hashed into an array
> that will contain the keywords mapped to an enum.
> 
> Now, I get the enum, and then I need to call the various commands
> that the enum maps to.
> 
> Currently, I'm using a huge (~400 cases) switch statement.
> 
> So, the question is:  Is that efficient?  Does the compiler
> generate code that does better than a linear search down the
> case statements?  If not, I can manually hack a sort of n-ary
> tree performance into it, but I'd wrather not if I can help it.
>
> Also, I'll be curious if anyone wants to spew forth their own ideas
> on how to parse user's commands into callable methods.
> 

Instead of the array mapping to enums, why not map to funtion pointers?

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