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std::initializer_list::size

STD：：初始化器[医]清单：：大小

size_type size() const;​(since C++11) (until C++14)
constexpr size_type size() const;​(since C++14)

返回初始化程序列表中的元素数，即std::distance(begin(), end())...

参数

%280%29

返回值

初始化程序列表中的元素数。

例外

noexcept规格：

noexcept

复杂性

常量。

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