llvm dev - Jan 2013 - [LLVMdev] Using C++'11 language features in LLVM itself

>> I suppose this tradeoff can be evaluated by looking at the delta
>> between 4.5 and 4.6 which is actually supported by MSVC 2010 and Clang
>> 3.1
>
> Makes perfect sense to me.
>
> -Chris
According to http://gcc.gnu.org/projects/cxx0x.html, these features
are available from 4.6 (language features only):

- Null pointer constant
- Forward declarations for enums
- Generalized constant expressions
- Unrestricted unions
- Range-based for
- Defining move special member functions
- Allowing move constructors to throw

Eli

On Fri, Jan 11, 2013 at 2:08 PM, Eli Bendersky <eliben at google.com>
wrote:
> >> I suppose this tradeoff can be evaluated by looking at the delta
> >> between 4.5 and 4.6 which is actually supported by MSVC 2010 and
Clang
> >> 3.1
> >
> > Makes perfect sense to me.
> >
> > -Chris
>
> According to http://gcc.gnu.org/projects/cxx0x.html, these features
> are available from 4.6 (language features only):
>
> - Null pointer constant
> - Forward declarations for enums
> - Generalized constant expressions
> - Unrestricted unions
> - Range-based for
> - Defining move special member functions
> - Allowing move constructors to throw
>
Of those, looks like only null_ptr is reasonably supported in MSVC 2010.
 Oh well...

>
> Eli
>


-- 

Thanks,

Justin Holewinski
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On 11.01.2013, at 20:08, Eli Bendersky wrote:
>>> I suppose this tradeoff can be evaluated by looking at the delta
>>> between 4.5 and 4.6 which is actually supported by MSVC 2010 and
Clang
>>> 3.1
>> 
>> Makes perfect sense to me.
>> 
>> -Chris
> 
> According to http://gcc.gnu.org/projects/cxx0x.html, these features
> are available from 4.6 (language features only):
> 
> - Null pointer constant
This is the only one fully supported by VS 2010.
> - Forward declarations for enums
This is partially supported. I don't know the exact extent.
> - Generalized constant expressions
> - Unrestricted unions
> - Range-based for
> - Defining move special member functions
> - Allowing move constructors to throw
These are all unsupported.

So the question is, is nullptr worth requiring 4.6.

Sebastian

On Fri, Jan 11, 2013 at 11:32 AM, Sebastian Redl
<sebastian.redl at getdesigned.at> wrote:
>
> On 11.01.2013, at 20:08, Eli Bendersky wrote:
>
>>>> I suppose this tradeoff can be evaluated by looking at the
delta
>>>> between 4.5 and 4.6 which is actually supported by MSVC 2010
and Clang
>>>> 3.1
>>>
>>> Makes perfect sense to me.
>>>
>>> -Chris
>>
>> According to http://gcc.gnu.org/projects/cxx0x.html, these features
>> are available from 4.6 (language features only):
>>
>> - Null pointer constant
>
> This is the only one fully supported by VS 2010.
>
>> - Forward declarations for enums
>
> This is partially supported. I don't know the exact extent.
>
>> - Generalized constant expressions
>> - Unrestricted unions
>> - Range-based for
>> - Defining move special member functions
>> - Allowing move constructors to throw
>
> These are all unsupported.
>
> So the question is, is nullptr worth requiring 4.6.
>
> Sebastian
nullptr fixes a bug with 2010's implementation of std::pair.

std::pair<int*, int*> a = std::make_pair(0, 0);

That doesn't work in 2010 :( (It was actually a bug in the standard
draft at the time 2010 came out)

- Michael Spencer