C++ Common Knowledge - Essential Intermediate Programming by By

Author:By
Language: eng
Format: epub
ISBN: 0-321-32192-8
Publisher: Addison Wesley Professional
Published: 2011-10-03T15:10:14.158899+00:00

It's also possible to encourage, rather than discourage, heap allocation. Just make the destructor private:

class OnHeap { ~OnHeap(); public: void destroy() { delete this; } //... };

Any ordinary attempt to declare an automatic or static OnHeap object will result in an implicit destructor call when the object's name goes out of scope.

OnHeap oh1; // error! implicit call of private dtor void aFunc() { OnHeap oh2; //... // error! implicit dtor call for oh2 }

Item 35. Placement New

It's impossible to call a constructor directly. However, we can trick the compiler into calling a constructor for us through the use of placement new.

void *operator new( size_t, void *p ) throw() { return p; }

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