[PATCH] Extend std::copy/std::copy_n char* overload to deque iterator

[François Dumont]

On 21/05/20 2:17 pm, Jonathan Wakely wrote:
>
> Why is the optimization not done for C++03 mode?
>
I did it this way because the new std::copy overload rely on std::copy_n 
implementation details which is a C++11 algo.


> It looks like the uses of 'auto' can be reaplced easily, and
> __enable_if_t<> can be replaced with __gnu_cxx::__enable_if<>::__type.
>
But yes, we can indeed provide those implementation details in pre-C++11.

This is what I've done in this new version.

Tested under Linux x86_64 in default c++ mode.

I tried to use CXXFLAGS=-std=c++03 but it doesn't seem to work even if I 
do see the option in build logs. I remember you adivised a different 
approach, can you tell me again ?

François

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