Re: [boost] C++11 Metaprogramming

Subject: Re: [boost] C++11 Metaprogramming
From: Fabio Fracassi (f.fracassi_at_[hidden])
Date: 2012-04-06 06:59:42

On 4/6/12 12:45 PM, ivan.lelann_at_[hidden] wrote:
>

>> Clearly, if you do not find requiring of the programmers to type this
>> "typename" in these places even slightly wrong, you will not
>> appreciate
>> alias templates as a useful addition to meta-programming. Also, if
>> you did
>> a lot of advanced meta-programming, you have probably mastered the
>> rules of
>> template syntax, and find it difficult to sympathize with those that
>> did
>> not master the subject.
>>
>> But looking at it from the fresh programmer's perspective, the fact
>> that
>> the language requires "to specify whenever dependent names in
>> template
>> contexts are anything else than values" means that the language is
>> not
>> friendly to the fresh programmers (I understand that there are good
>> reasons
>> for requiring this, but still...).
>>
>> Based on the Wkipedia's definition of "gotcha"
> (...)
>
> (off-topic)
> IMHO, a gotcha leading only to a compile time error is not really a gotcha.
>

The problem is that VC with its non two phase lookup often doesn't 
require it, and compiles fine without.
I can't count the times I had to fix broken check-ins from our Windows 
developers, who fell into exactly this gotcha.

regards

Fabio