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如何理解 unique_ptr 的定义？
source link: https://www.zhihu.com/question/465465935/answer/1944855796
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如何理解 unique_ptr 的定义？
哪里有开源软件里C++ template 使用实例？ 内图片中包含如下代码，怎么理解，我读不懂啊，:: 在这里啥意思？还有 using _Delete…
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C++程序猿, 公众号：高级开发者
这个using是作为alias使用的，避免你需要敲一大堆字符。
template <typename _Up>
using _DeleterConstraint = typename __uniq_ptr_impl<_Tp, _Up>::_DeleterConstraint::type;
使用只需要写_DeleterConstraint<T>来代替一长串的typename __uniq_ptr_impl<_Tp, _Up>::_DeleterConstraint::type;
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