普通对new的调用与由stl容器进行的调用之间有什么区别? [英] What is the diffference between normal call to new and one made by stl containers?

问题描述

普通调用new和stl容器进行的调用之间有什么区别?首先有什么区别吗?

What is the diffference between normal call to new and one made by stl containers?is there any difference in the first place?

推荐答案

STL容器使用它们包含的类型的默认分配器.但是，您可以对此进行控制(这是容器构造函数的可选参数)，例如，参见 std :: vector文档 [ ^ ].

STL containers use the default allocator of the type they contain. However you have control on this (is an optional argument of the container constructor), see, for instance std::vector documentation[^].

STL容器不调用new.不是在堆上分配对象时的方式.

只需看看 std :: allocator [本文 [

STL containers don''t call new. Not the way you do when allocating an object on the heap.

Just give a look to std::allocator[^]. This is what STL containers use to allocate dynamic memory.

This article[^] explain how it is implemented.

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