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Subject: Re: [boost] scoped_ptr deleter
From: Felipe Magno de Almeida (felipe.m.almeida_at_[hidden])
Date: 2009-09-16 10:01:00

On Wed, Sep 16, 2009 at 12:54 PM, Stefan Strasser
<strasser_at_[hidden]> wrote:
> Am Wednesday 16 September 2009 10:34:35 schrieb Berserker:
>> Dmitry Goncharov wrote:
>>  > The difficulty that your example demonstrates is caused by the nature
>>  > of template template parameters. scoped_ptr should not be blamed for
>> that.
>> I agree, moreover I think that the advantages of this patch (often
>> required in the list)
> could you explain what those advantages are?
> a scoped_ptr can't be copied at can't be moved. so there are two use cases
> left for a scoped_ptr deleter:
>  - scoped_ptr as a class member: execute code when the class gets
> destructed -> that's what a destructor is for.

You could say the same for use delete in the destructor and never use
scoped_ptr at all.

>  - scoped_ptr as a local variable, execute code when something goes out of
> scope -> that's what boost ScopeExit is for.

The same is valid for delete as well.

> what is the use case that only a scoped_ptr deleter can handle?

None. The same is valid for almost anything else in RAII. But RAII
simplifies things *a lot*.

Felipe Magno de Almeida

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