StackOverflow2013

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PO
primarykey
Id
9383318
data
AcceptedAnswerId
0
AnswerCount
0
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0
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CreationDate
2012-02-21T18:48:03.753
FavoriteCount
0
LastActivityDate
2012-03-07T00:40:51.507
LastEditDate
2012-03-07T00:40:51.507
LastEditorUserId
955611
OwnerUserId
955611
ParentId
9333055
PostTypeId
2
Score
0
ViewCount
0
LastEditorDisplayName
text
Body
I ended up creating the following class: <pre><code>#include <type_traits> // Or <boost/type_traits.hpp> template <typename Ty> class manually_constructed { public: template <typename T> manually_constructed(T construct_func) { construct_func(static_cast<Ty*>(static_cast<void*>(&data))); } ~manually_constructed() { static_cast<Ty*>(static_cast<void*>(&data))->~Ty(); } Ty& operator*() { return *static_cast<Ty*>(static_cast<void*>(&data)); } Ty* operator->() { return static_cast<Ty*>(static_cast<void*>(&data)); } private: // Replace 'std' with 'boost' if your standard library doesn't support // type_traits, yet. std::aligned_storage<sizeof(Ty), std::alignment_of<Ty>::value>::type data; }; </code></pre> Then, in my class, I can have a member such as <code>manually_constructed<OtherClass> object</code> and a private static method such as: <pre><code>static void construct_object(OtherClass *p) { try { new(p) OtherClass(/* Risky arguments */); } catch(...) { new(p) OtherClass(/* Fallback arguments */); } } </code></pre> Finally, in my initializer list, I can have <code>object(construct_object)</code>. With this solution, all member objects are stored within the containing object, there is no additional space overhead, all member objects are constructed in the correct order, and manually constructed objects will be destructed automatically.
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1. POMore control over construction of member objects in C++
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1. USrkjnsn
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1. USrkjnsn
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1. POMore control over construction of member objects in C++
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