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Alex Rivera
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While reading books on C++ and the standard library, I see frequent references to allocators. For example, Nicolai Josuttis's The C++ Standard Library discusses them in detail in the last chapter, and both items 10 ("be aware of allocators' conventions & restrictions") and 11 ("understand the legitimate uses of custom allocators") in Scott Meyers's Effective STL are about their use. My question is, how do allocators represent a special memory model? Is the default STL memory management not enough? When should allocators be used instead? If possible, please explain with a simple memory model example.
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