Re: [Boost-users] boost and std collisons in c++0x

Subject: Re: [Boost-users] boost and std collisons in c++0x
From: Sergey Sadovnikov (flex_ferrum_at_[hidden])
Date: 2009-02-05 16:02:08

Hello, Michael.

Thursday, February 5, 2009 at 11:09:49 PM you wrote:

MF> We're getting off-topic, but I couldn't resist.
We are talking about namespaces, so I think it is good idea to look
around. :)

MF> What happens when I do:

MF> using System.Drawing;
MF> using Microsoft.XNA.Framework;

MF> Point p = new Point(); // Doh!
Good example. But... You have to do something very _special_ if you
want to get the same result inside only 'System' namespace. Isn't it?
I mean what you can use unqualified ids and usings in most cases
without any errors from the compilator _when you use only standard
facilities_.

MF> You see, these problems occur in C# too, and the same answer (from
MF> C++) is given as to how to correct the issue.  Make a namespace alias,
MF> or use full qualification.

MF> If you want to use boost, use boost::.  If you want to use the STD
MF> library, use std::.
Perfectly! What you can say about following pieces of code:

std::vector<std::shared_ptr<SomeClass>> vec;
std::for_each(vec.begin(), vec.end(), std::bind(&std::shared_ptr<SomeClass>::get, std::placeholders::_1, std::bind(&SomeClass::foo, std::placeholders::_1, 10)));

and

vector<shared_ptr<SomeClass>> vec;
for_each(vec.begin(), vec.end(), bind(&shared_ptr<SomeClass>::get, _1, bind(&SomeClass::foo, _1, 10)));

from the readness point of view?
Assume what I place std and std::placeholders namespace into new namespace ('slib'):

slib::vector<slib::shared_ptr<SomeClass>> vec;
slib::for_each(vec.begin(), vec.end(), slib::bind(&slib::shared_ptr<SomeClass>::get, slib::_1, slib::bind(&SomeClass::foo, slib::_1, 10)));

Is it quite readable or your eyes are seeing only 'slib' and '::'? Is _it_ improving of 'code readness'? And you are offering C++ beginners to use such coding style. It is good style, but I'm absolutely sure what beginners (even with C# or Java experience) say you something ugly and then return to C# or Java. :)

-- 
Best Regards,
 Sergey                          mailto:flex_ferrum_at_[hidden]