C ++ STL问题：分配器 [英] C++ STL question: allocators

问题描述

我有一个（潜在的愚蠢）关于C ++ STL的问题。当我做一个容器（向量，集合，地图等），它是分配在堆栈还是堆？如果我做一个集合并放置500万个字符串，我将不必担心堆栈溢出。

I have a (potentially dumb) question about the C++ STL. When I make a container (vector, set, map, etc), is it allocated on the stack or on the heap? If I make a set and put 5 million strings, will I have to worry about a stack overflow?

推荐答案

从堆分配它们的内部缓冲区，尽管这些类也允许自定义分配器允许用户指定一个备用位置从 - eg分配共享内存池。

STL classes by default allocate their internal buffers from the heap, although these classes also allow custom allocators that allow a user to specify an alternate location to allocate from - e.g. a shared memory pool.

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