Convert between string, u16string & u32string

Question

I\'ve been looking for a way to convert between the Unicode string types and came across this method. Not only do I not completely understand the method (there are no commen

Answer 1

I've written helper functions to convert to/from UTF8 strings (C++11):

#include 
#include 
#include 

using namespace std;

template 
string toUTF8(const basic_string, allocator>& source)
{
    string result;

    wstring_convert, T> convertor;
    result = convertor.to_bytes(source);

    return result;
}

template 
void fromUTF8(const string& source, basic_string, allocator>& result)
{
    wstring_convert, T> convertor;
    result = convertor.from_bytes(source);
}

Usage example:

// Unicode <-> UTF8
{
    wstring uStr = L"Unicode string";
    string str = toUTF8(uStr);

    wstring after;
    fromUTF8(str, after);
    assert(uStr == after);
}

// UTF16 <-> UTF8
{
    u16string uStr;
    uStr.push_back('A');
    string str = toUTF8(uStr);

    u16string after;
    fromUTF8(str, after);
    assert(uStr == after);
}