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std::basic_string_view::remove_prefix

性病：基本[医]弦[医]意见：：删除[医]前缀

constexpr void remove_prefix(size_type n​(since C++17)

将视图的开始向前移动n人物。

如果n > size()...

参数

n-number of characters to remove from the start of the view

返回值

%280%29

复杂性

常量。

例

二次

#include <iostream>
#include <string_view>
int main()
{
    std::string str = "   trim me";
    std::string_view v = str;
    v.remove_prefix(std::min(v.find_first_not_of(" "), v.size())
    std::cout << "String: '" << str << "'\n"
              << "View  : '" << v << "'\n";
}

二次

产出：

二次

String: '   trim me'
View  : 'trim me'

二次

另见

remove_suffixshrinks the view by moving its end backward (public member function)

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