[PATCH]: Add lower_bound to vec.h

[Nathan Sidwell]

Daniel Berlin wrote:

> I'm not sure this is isn't just a premature concern.
> Looking at the generated assembly and object files on powerpc, it's only 
> 1.5x the size of the other vector functions.
> Thus, I'd rather take care of this particular problem when it actually 
> becomes a problem :)
> However, if you really have strong feelings about this, i'm happy to do 
> the above.
No strong feelings, thanks for the measurements.

1) you've documented both pointer and object versions, but only implemented
the pointer version

2) can you add some blurb to the introductory stuff at the top of the file?

ok with those changes.

thanks

nathan


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