Re: [boost] [container] [flat_map] Error with heterogeneous comparator and std::string_view

Subject: Re: [boost] [container] [flat_map] Error with heterogeneous comparator and std::string_view
From: Viktor Sehr (viktor.sehr_at_[hidden])
Date: 2018-08-13 13:02:23

Thank you Ion!

Best /Viktor

On Mon, Aug 13, 2018 at 12:44 AM Ion Gaztañaga via Boost <
boost_at_[hidden]> wrote:

> On 12/08/2018 18:26, Viktor Sehr via Boost wrote:
> > On MSVC (latest) the following code yields a compile error with flat_map,
> > but not with std::map. I do not have the knowledge of std::less<> to
> > resolve what causes the error.
> >
> > auto fm = boost::container::flat_map<std::string, int, std::less<> >{};
> > auto m = std::map<std::string, int, std::less<> >{};
> > auto k = std::string_view{ "my_key" };
> > auto x = m.find(k); // Compiles
> > auto y = fm.find(k);  // Does NOT compile
>
> Looks like a bug in the is_transparent trait. It seems that used
> transparent comparator in tests was not detecting the issue. Working on
> a patch.
>
> Best,
>
> Ion
>
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