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Subject: Re: [boost] [1.47.0] Permission to merge filesystem fix
From: Eric Niebler (eric_at_[hidden])
Date: 2011-07-06 01:26:33

On 7/5/2011 9:32 AM, Beman Dawes wrote:
> On Tue, Jul 5, 2011 at 11:31 AM, Eric Niebler <eric_at_[hidden]> wrote:
>> Let me clarify why I was asking though, because I don't think I was
>> clear. The constructor arguments may already have the required type, but
>> you can't really know anything about their encoding because that's not
>> encoded in the type system. Previously, you were always running these
>> strings through a transformation. You're presuming (and you would know
>> best of course) that the transformation was always a no-op for arguments
>> of this type. I was asking if you were really 100% sure.
> Actually, the codecvt argument has always been ignored if the
> value_types were the same. See the convert() overloads in
> path_traits.hpp, starting at line 125. The only difference is that by
> introducing the two constructor value_type overloads there is no call
> to codecvt(), so no attempt to access a locale that may be invalid.
> Since the two internal path constructions always have value_type
> arguments, the changet eliminates the chance of that exception being
> thrown before main() starts.

Thanks for the clarification.

Eric Niebler
BoostPro Computing

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