std::string exorcism hiccup

[Phil Edwards]

On Thu, Jun 13, 2002 at 06:29:06PM +1200, Tony Bryant wrote:
> As recommended by listers, I've been going through my project attempting
> to replace 
> 
> std::string 
> 
> with 
> 
> std::basic_string<char,std::char_traits<char>,myallocator<char> >

As an aside, I wonder if there can be a member template copy constructor that
allows basic_string's of the same character type, but different allocator
types, to copy data to/from each other.  [17.4.4.4]/2 allows the practice,
[21.3] doesn't prohibit the signature, [14.5.2] would seem to allow it,
but I don't know whether [12.8]/3 doesn't kill the idea.  (The example
given in the text doesn't make a whole lot of sense to me.)

That way

    std::string                                      a;
    ...
    std::basic_string<char,....., something_weird>   b (a);

would work.

I'll experiment with this once the ol' RSI lets up next week.  :-)


Phil

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