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Subject: Re: [boost] [multi_index] scalar insert interface
From: JOAQUIN M. LOPEZ MUÑOZ (joaquin_at_[hidden])
Date: 2010-11-05 14:15:40

De: boost-bounces_at_[hidden] [boost-bounces_at_[hidden]] En nombre de Stewart, Robert [Robert.Stewart_at_[hidden]]
Enviado el: viernes, 05 de noviembre de 2010 18:54
Para: boost_at_[hidden]
Asunto: Re: [boost] [multi_index] scalar insert interface
> Maxim Yegorushkin wrote:
> >
> > In ordered_index there are two scalar insert overloads:
> >
> > std::pair<iterator,bool> insert(const value_type& x);
> > iterator insert(iterator position,const value_type& x);
> >
> > The second version is lacking the bool result, which is sometimes
> > required.
> As is, it mirrors std::map's interface.

Correct, this is exactly the rationale behind the difference in the
result types of both overloads. Clever as Maxim's suggestion is,
I'm reluctant to diverge from the standard without a compelling
reason --here the benefit does not seem impressive, since there
are efficient ways to determine whether the insertion took place,
for instance checking size() before and after trying the insertion.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

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