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POCasting a container of shared_ptr
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Id
2782092
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AcceptedAnswerId
2782127
AnswerCount
4
ClosedDate
CommentCount
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CommunityOwnedDate
CreationDate
2010-05-06T15:05:26.830
FavoriteCount
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LastActivityDate
2010-05-07T07:21:57.983
LastEditDate
2010-05-07T07:21:57.983
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1
Score
2
ViewCount
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LastEditorDisplayName
text
Body
I have a method <pre><code>void foo(list<shared_ptr<Base>>& myList); </code></pre> Which I'm trying to call with a two different types of lists, one of DerivedClass1 and one of DerivedClass2 <pre><code>list<shared_ptr<DerivedClass1>> myList1; foo(myList1); list<shared_ptr<DerivedClass2>> myList2; foo(myList2); </code></pre> However this obviously generates a compiler error <pre><code>error: a reference of type "std::list<boost::shared_ptr<Base>, std::allocator<boost::shared_ptr<Base>>> &" (not const-qualified) cannot be initialized with a value of type "std::list<boost::shared_ptr<DerivedClass1>, std::allocator<boost::shared_ptr<DerivedClass1>>>" </code></pre> Is there any easy way to cast a container of shared_ptr? Of alternate containers that can accomplish this? Update: Thanks to everyone who responded. Working within the confines of the language, it seems the best way to go while keeping the method 'as-is' is to use a container of shared_ptr and pass exactly that in (creating a new list at the call site). I guess I pretty much already knew this, but I remembered reading about other parts of the boost library dealing with containers of shared_ptr and thought maybe it was solved more elegantly by someone else already. From my own further research however these seem to be geared more towards reducing overhead of shared_ptr in cases where a number of pointers are owned exclusively (therefore requiring a single lock per container rather than one per object in the container). Thanks again, you guys are all awesome!
Tags
<c++><boost><casting><containers><shared-ptr>
Title
Casting a container of shared_ptr
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1. PO
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 PTAnswer
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1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USJamie Cook
UserOwnerUserId
1. USJamie Cook
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1. PO
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 PTAnswer
2. PO
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1. VO
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 POCasting a container of shared_ptr
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