Le 15/05/12 12:09, Vicente J. Botet Escriba a écrit :

Hi,

I have a bimap

typedef bimap<
    multiset_of< tagged< Person*,                     consultant> >,
    multiset_of< tagged< Company*,                 client> >,
    with_info<    tagged< ConsultancyContract*, contract> >
> Consultancy;

initialized as follows

Consultancy consultancy;
Person John("John"), Jane("Jane");
Company Dell("Dell"), HP("HP");
ConsultancyContract JohnContractD(10,1);
ConsultancyContract JaneContractD(20, 2);
ConsultancyContract JaneContractH(30, 3);

consultancy.insert(Consultancy::value_type(&Jane, &Dell, &JaneContractD));
consultancy.insert(Consultancy::value_type(&Jane, &HP, &JaneContractH));

and I want to remove only the specific association Jane<->Dell and so I'm using

consultancy.erase(Consultancy::value_type(&Jane, &Dell));

but then the resulting consultancy bimap is empty, while I expect the association Jane<->HP to be there yet.

If I add before erasing
consultancy.insert(Consultancy::value_type(&John, &Dell, &JohnContractD));

and then
consultancy.erase(Consultancy::value_type(&Jane, &Dell));

all the associations concerning Jane are removed.

What I'm doing wrong? How to erase a single association?

I have reached to get what I was locking for.

I have added set_of_relation<> to the bimap definition

typedef bimap<
    multiset_of< tagged< Person*,                     consultant> >,
    multiset_of< tagged< Company*,                 client> >,
    with_info<    tagged< ConsultancyContract*, contract> > ,
    multiset_of_relation<>
> Consultancy;

Is there another way when the collection of relation is the default

left_based?

I find the default behavior a little bit surprising. Why provide a erase function requesting the value_type if only the left side is taken in account?



        What is the rationale to have the default left_based? Space
        optimization?

        

        It works also with multiset_of_relation. I don't see a use case
        for this. When the user could want the same association to be
        several times? Could some one give me an example?

        

        Best,

        Vicente