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Subject: Re: [boost] filesystem::path passed to GTest's assertion leads to stack overflow because of infinite recursion
From: Andrey Upadyshev (oliora_at_[hidden])
Date: 2012-11-10 03:39:22

On Sat, Oct 27, 2012 at 1:19 AM, Beman Dawes <bdawes_at_[hidden]> wrote:

> On Fri, Oct 26, 2012 at 4:36 PM, Beman Dawes <bdawes_at_[hidden]> wrote:
> > On Fri, Oct 26, 2012 at 9:20 AM, Andrey Upadyshev <oliora_at_[hidden]>
> wrote:
> >>
> >> Why don't just present path's iterator value_type with
> >> std::basic_string? This is (IMHO) more clear and nearer to "reality"
> >> than path consisting of paths consisting of paths consising of paths
> >> etc without the end :)
> >
> > std::basic_string<char> doesn't work well as the iterator value_type
> > on platforms that may be using a native encoding for std::string that
> > has doesn't have a representation for all possible characters. UTF-8
> > would be a partial solution, but prone to errors for users who assume
> > native encoding, and extra work for those who really want the native
> > encoding.
> >
> > std::wstring, u16string, and u32string each have their own set of
> problems.
> >
> > What would really be helpful is an extended string type that was
> > easily convertible to any of the std string types, with a way to
> > specify the desired encoding when the value_type is char. The closest
> > thing we have right now is type path itself.
> An alternative design might be to make path::begin() and path::end()
> member templates, parametrized on charT, traits, Allocator, and then
> specify the value_type as basic_string<charT, traits, Allocator>.
> Presumably encoding would with be dealt with as is done in other
> functions. Or just provide string_begin()/string_end(),
> wstring_begin()/wstring_end(), etc.
> --Beman

 No more top quotes from me, promise!

I got the problem with encoding. So std::basic_string<CharT> as path
element doesn't fit well. But it's possible to introduce some additional
class like path_segment or path_string which will be used internally in
path and return as path's element during the iteration of path. The will
break the strange behavior with infinite depth of path object.


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