Boost logo

Boost :

Subject: Re: [boost] Is there any interest in static constructors?
From: Mateusz Loskot (mateusz_at_[hidden])
Date: 2013-02-01 13:08:57

On 1 February 2013 17:09, Alexander Stoyan <alexander.stoyan_at_[hidden]> wrote:
> Hello Mathias,
> I'm afraid you didn't get the point. Let me explain.

Without walking through the implementation in details, I didn't get
it at first sight either.

>>> The object will only be constructed when instance() is called
> Technically, yes, the instance will be create once singleton::instance is
> called for the first time, but in order to make it constructed BEFORE main,
> singleton::instance has to be called during static data initialization, and
> static_init GUARANTIES that this static initialization will be performed
> before main WITH NO additional calls.

IMHO, the problem is, that you don't explain this important point
in your blog (which I assume serves documentation purpose).

The three crucial principles of the idea seem to be as follows:
1. singleton::instance is called during static initialisation.
2. static_unit guarantees that the requirement 1. is fulfilled.
3. static_unit realises the guarantee by...

But, they don't stand out from your blog clearly.

Best regards,

Mateusz Loskot,

Boost list run by bdawes at, gregod at, cpdaniel at, john at