Re: [Boost-users] [multi_index] do erase() call key extractors?

Subject: Re: [Boost-users] [multi_index] do erase() call key extractors?
From: Joaquin M Lopez Munoz (joaquin_at_[hidden])
Date: 2015-12-25 05:31:12

Nick Stokes <randomaccessiterator <at> gmail.com> writes:

> 
> This is probably rather obvious, but I wasn't able to locate this
> guarantee in MIC docs. Take,
>
> struct Foo {
> Â  Â  explicit Foo(Bar* b = nullptr) : bar(b) {}
> Â  Â  Bar* bar; Â  Â 
> };
> 
> int getBarValue (const Foo& f) {
> Â  Â  Â assert( f.bar );
> Â  Â  Â return f.bar->getValue();
> }
> 
> 
> boost::multi_index< Foo, Â indexed_by<Â 
>     hashed_unique < member<Foo, Bar* , &Foo::bar > >>
> , Â  hashed_non_unique < global_fun<const Foo&, int, &getBarValue >>
> >> Â  FooIndex;
> 
> void grill() {
>     FooIndex  fooIndex;
> 
> Â  Â  Bar* b;
> Â  Â  {
> Â  Â  Â  Â  Â auto bWork = make_unique<Bar>();
> Â  Â  Â  Â  Â // ...
> Â  Â  Â  Â  Â fooIndex.emplace( bWork.get() );
> Â  Â  Â
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