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std::basic_string_view::length

性病：基本[医]弦[医]视图：大小，std：：basic[医]弦[医]意见：：长度

constexpr size_type size() const;​(since C++17)
constexpr size_type length() const;​(since C++17)

返回CharT视图中的元素，即std::distance(begin(), end())...

参数

%280%29

返回值

的数目CharT视图中的元素。

例外

noexcept规格：

noexcept

复杂性

常量。

另见

emptychecks whether the view is empty (public member function)
max_sizereturns the maximum number of characters (public member function)

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