我如何将此 std::string 转换为 std::basic 字符串？

Question

目前我有一个名为 cipher_line 的 std:::string，我从以下过程中获得：

string str_cipher_line;
// Get the Offline Mount Point
ifstream ifs1;
ifs1.open(offlineMountPoint.c_str());

if (ifs1.is_open()) {
    getline(ifs1, str_cipher_line);
} else {
    cout << "unable to open file" << endl;
    return 1;
}

ifs1.close();

现在我希望能够从 cipher_line 得到一个 secure_string。 secure_string定义如下：

typedef std::basic_string<char, std::char_traits<char>, zallocator<char> > secure_string;

我不明白该怎么做。我应该雇用 memcpy 还是 strcpy？

Answer 1

使用 std::basic_string iterator constructor（cppreference 上为 6）从 secure_string 或 std::copy 构建。反之亦然。

#include <iostream>

template <typename T>
struct some_other_allocator : std::allocator<T>{};

using other_string = std::basic_string<char, std::char_traits<char>, some_other_allocator<char>>;

int main() {
    other_string string1("hello");

    //using std::string constructor
    std::string string2(string1.begin(),string1.end());

    std::string string2_copy;
    //using std::copy
    std::copy(string1.begin(),string1.end(),std::back_inserter(string2_copy));

    std::cout << string1 << std::endl;
    std::cout << string2 << std::endl;
    std::cout << string2_copy << std::endl;
    return 0;
}

Demo

我如何将此 std::string 转换为 std::basic 字符串？

How would I get convert this std::string into a std::basic string?

c++

string

std

memcpy

strcpy