Re: Do I need a singleton here? RESOLVED

From:

"Jim Langston" <tazmaster@rocketmail.com>

Newsgroups:

comp.lang.c++

Date:

Wed, 20 Oct 2010 14:23:46 -0700

Message-ID:

<i9nml1$4ih$1@four.albasani.net>

"Jim Langston" <tazmaster@rocketmail.com> wrote in message
news:i9j7i2$73r$1@four.albasani.net...

I am developing a font class for my opengl graphics library and I came
across a quandry. I have a font which is simply a value for font id and
wrapper code to load the font and kill it. Works fine, then I notice I
don't have a virtual destructor, nor any destructor at all. So I throw in
a virtual destructor and call the code to unload the glfont. I run the
program, now no fonts are visible.

The problem is that my fonts are stored in a map by font name and the
font, and of course std::maps along with most containers use copy.

Resolution:
I used Microsoft Express 2010 C++0x utilization of std::move for containers.

I had a problem implementing this because when I first created a move
constructor I was still using assignment in my code. I disbled the
assignment operator and fixed my code and it works as advertised. I had to
change the elegant line of:
world.fonts[L"Normal"] = jmlGL::jglFont( hDC, L"Courier New", 24 );
to the no where near as elegant line of:
world.fonts.insert(std::pair<std::wstring, jmlGL::jglFont>( L"Normal",
jmlGL::jglFont( hDC, L"Courier New", 24 ) ) );

my program worked as expected and I am able to use non-copyable objects in a
container.