Re: [boost] boost::filesystem::path frustration

Subject: Re: [boost] boost::filesystem::path frustration
From: Dave Abrahams (dave_at_[hidden])
Date: 2013-01-27 19:55:50

on Sun Jan 27 2013, Eric Niebler <eniebler-AT-boost.org> wrote:

> On 1/25/2013 3:54 PM, Dave Abrahams wrote:
>> 
>> on Fri Jan 25 2013, Eric Niebler <eniebler-AT-boost.org> wrote:
>> 
>>> On 01/25/2013 08:30 AM, Beman Dawes wrote:
>>>> Not particularly elegant, but this does work:
>
>>>>
>>>>        path x("/foo/bar");
>>>>        path y("/foo/baar");
>>>>
>>>>        auto result = std::mismatch(x.begin(), x.end(), y.begin());
>>>>
>>>>        path prefix;
>>>>        for (auto itr = x.begin(); itr != result.first; ++itr)
>>>>           prefix /= *itr;
>>>
>>> I believe this last bit is just std::accumulate with std::divides<path>.
>>> Whether that better expresses intent is another matter.
>> 
>> Seriously, no.  I have no problem using / for path construction, but
>> "divides" means division.
>
> struct append_path : std::divides<path> {};
> path prefix = std::accumulate( x.begin(), result.first, path(),
> append_path() );

That one's fine :-)

-- 
Dave Abrahams
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