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From: David Abrahams (dave_at_[hidden])
Date: 2005-05-24 06:49:33

Vladimir Prus <ghost_at_[hidden]> writes:

> Hi,
> I rewrote path.glob again, hopefully it's the last time.
> The problem with the previous implementation is that it would iterate
> over all elements in a dir even if 'pattern' had no metacharacters. First,
> that was slow -- if you handed
> /cygdrive/w/My Documents/boost/test/a.cpp
> to it, it would crawl all the way to the top, listing each directory and
> checking each file. Second, it would fail, because Cygwin is broken and
> does not show 'cygdrive' is the list of directory elements of '/'.
> The new glob is implemented as new 'GLOB-RECURSIVELY' builtin. I've decided
> to use builtin since otherwise, we'd need 'does this name exist' builtin,
> and if we need new builtin, why don't implement all globbing in core.


a) it means you can't just get the 'does this name exist'
functionality without paying for globbing

b) if you made a mistake in your globbing code you will have to
ask people to rebuild again.

I'm not saying you should reverse what you've done, but there were
good reasons I established the principle that the core should stay as
small as possible.

Dave Abrahams
Boost Consulting

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