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Re: Array problems [message #48619 is a reply to message #48618]

Wed, 09 August 2017 13:34

Oblivion
Messages: 1094
Registered: August 2007

Senior Contributor

Hello,

Answer to question 2 (your first question is closely related to your second question): You are deallocating an already deallocated memory (testLayout). Because you've passed the address of a stack allocated object to Array (which is nor forbidden since Array does not know, nor does it care how, or from where (stack or heap), its elements are created as long as you give its address. It allows taking the ownership (of HEAP allocated objects). Read the docs Luke! Smile

). But you forget that when the array gets destroyed, so is testlayout. So you are also corrupting the program's heap, since testLAyout is allocated from stack, and "&layout" gets "delete[ed]" which is a valid operation only on heap-allocated objects.

Did you try:

Array<WithTestLayout<ParentCtrl> > layouts;
auto& testLayout = layouts.Add(); // <-- Creates the ParentCtrl with the given layout as its element.

Best regards,
Oblivion

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[Updated on: Wed, 09 August 2017 13:48]

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