New libraries and features for g++ 4.5.

[Ed Smith-Rowland]

Ed Smith-Rowland wrote:
> Germán Diago wrote:
>> Hello. I cannot find too much updated information about gcc 4.5 in 
>> general.
>>
>> I saw from svn the inclusion of threads and futures. Are they usable 
>> right now?
>> And I would like to know if the things that are being included from
>> the c++0x library
>> are usable once they're in svn, or they're just highly experimental.
>> Thanks in advance.
>>
>> I'm also interested if lambda expressions and constexpr are coming in 
>> gcc 4.5.
>> Thanks in advance.
>>
>>   
> I'm not sure where constexpr is but lambda is moving right along: 
> Check it out here: 
> http://gcc.gnu.org/viewcvs/branches/cxx0x-lambdas-branch/.  I've built 
> and run some interesting cases with lambdas.  They may be waiting to 
> see what the next draft of the standard looks like after the concepts 
> fall-out.
>
> The new library components are experimental but not 'very'.  They 
> should be usable and we would really want people to use them and 
> report problems.  They are checked in with test cases that should pass.
>
> Personally I haven't used the thread and future, etc libraries much.  
> I've used all the containers in programs.  I've used random.
>
> Ed
>
>
>
I should add that the experimental C++-0X library is not necessarily ABI 
stable - the class layouts can change.  My earlier comments were to 
suggest that people could use the library and test it usefully and that 
feedback is useful and necessary.

Ed