wstring

I saw that C++0x will add support for UTF-8, UTF-16 and UTF-32 literals. But what about conversions between the three representations ? I plan to use std::wstring everywhere in my code. But I also need to manipulate UTF-8 encoded data when dealing with files and network. Will C++0x provide also support for these operations ? In C++0x, char16_t and char32_t will be used to store UTF-16 and UTF-32 and not wchar_t . From the draft n2798: 22.2.1.4 Class template codecvt 2 The class codecvt is for use when converting from one codeset to another, such as from wide characters to multibyte characters

Do anyone know if there is a STL interface compatible string class that allocates memory for small strings on the stack (up to a certain threshold) and the heap for larger strings ? I'm looking to optimize a program and I'm using allot of small local strings that easily could fit on the stack, instead of being allocated on the heap. Björn Pollex You can provide a custom allocator for std::basic_string (it is the third template argument). This answer explains how use that and links to an implementation of a stack-allocator that can be used. The vstring (__versa_string) implementation from gcc

I have a game which uses std::wstring as its basic string type in thousand of places as well as doing operations with wchar_t and its functions: wcsicmp() wcslen() vsprintf(), etc. The problem is wstring is not supported in R5c (latest ndk at the time of this writting). I can't change the code to use std::string because of internationalization and I would be breaking the game engine which is used by many games ... Which options do I have? 1 - Replace string and wstring with my own string classes This would give me better platform independency, but it is ridiculous to reimplement the wheel. I

I'm working on a english only C++ program for Windows where we were told "always use std::wstring", but it seems like nobody on the team really has much of an understanding beyond that. I already read the question titled "std::wstring VS std::string . It was very helpful, but I still don't quite understand how to apply all of that information to my problem. The program I'm working on displays data in a Windows GUI. That data is persisted as XML. We often transform that XML using XSLT into HTML or XSL:FO for reporting purposes. My feeling based on what I have read is that the HTML should be

I'm using Qt/C++ on a Linux system. I need to convert a QLineEdit 's text to std::wstring and write it into a std::wofstream . It works correctly for ascii strings, but when I enter any other character (Arabic or Uzbek) there is nothing written in the file. (size of file is 0 bytes). this is my code: wofstream customersFile; customersFile.open("./customers.txt"); std::wstring ws = lne_address_customer->text().toStdWString(); customersFile << ws << ws.length() << std::endl; Output for John Smith entered in the line edit is John Smith10 . but for unicode strings, nothing. First I thought that is

I programmed a little Application in C++. There is a ListBox in the UI. And I want to use the selected Item of ListBox for an Algorithm where I can use only wstrings. All in all I have two questions: -how can I convert my String^ curItem = listBox2->SelectedItem->ToString(); to a wstring test? -What means the ^ in the code? Thanks a lot! It should be as simple as: std::wstring result = msclr::interop::marshal_as<std::wstring>(curItem); You'll also need header files to make that work: #include <msclr\marshal.h> #include <msclr\marshal_cppstd.h> What this marshal_as specialization looks like

To find out if C++ is the right language for a project of mine, I wanna test the UTF-8 capabilities. According to references, I built this example: #include <string> #include <iostream> using namespace std; int main() { wstring str; while(getline(wcin, str)) { wcout << str << endl; if(str.empty()) break; } return 0; } But when I type in an UTF-8 character, it misbehaves: $ > ./utf8 Hello Hello für f $ > Not only it doesn't print the ü , but also quits immediately. gdb told me there was no crash, but a normal exit, yet I find that hard to believe. robert petranovic Don't use wstring on Linux.