Re: [boost] [guidelines] why template errors suck

Subject: Re: [boost] [guidelines] why template errors suck
From: joel falcou (joel.falcou_at_[hidden])
Date: 2010-09-26 09:12:08

On 26/09/10 14:51, Mathias Gaunard wrote:
> The idea, in order to provide better error messages, is to test 
> whether all the expressions you're going to evaluate are going to lead 
> to errors.
>
> Then, if they don't, you evaluate said expressions. However, this 
> basically ends up doing the same thing twice (or worse, checking the 
> expressions are valid may be more costly than actually instanciating 
> them) as far as the compiler is concerned.
>
> Therefore I think the solution is to provide a compiler debug mode in 
> which we do this testing, and one where we don't.
>

In my own epxerience, I have a global ENABLE_COMPILE_TIME_CHECK macro 
that control all instance of such tests.