C++0x 是否支持 std::wstring 与 UTF-8 字节序列之间的转换？
我看到 C++0x 将添加对 UTF-8、UTF-16 和 UTF-32 文字的支持。 但是这三种表示形式之间的转换又如何呢？
我计划在代码中的任何地方使用 std::wstring 。 但我在处理文件和网络时还需要操作UTF-8编码的数据。 C++0x 也会提供对这些操作的支持吗？
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 ?
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在 C++0x 中，
char16_t和char32_t将用于存储 UTF-16 和 UTF-32，而不是wchar_t。来自草案 n2798：
关于
wchar_t的事情是它不会为您提供有关所使用的编码的任何保证。 它是一种可以容纳多字节字符的类型。 时期。 如果您现在要编写软件，您就必须接受这种妥协。 与 C++0x 兼容的编译器还有很长的路要走。 您始终可以尝试一下 VC2010 CTP 和 g++ 编译器，看看它是否值得。 此外，wchar_t在不同平台上具有不同的大小，这是另一件事需要注意（VS/Windows 上为 2 字节，GCC/Mac 上为 4 字节等）。 然后，GCC 的-fshort-wchar等选项使问题进一步复杂化。因此，最好的解决方案是使用现有的库。 追踪 UNICODE 错误并不是精力/时间的最佳利用方式。 我建议你看一下：
有关 C++0x Unicode 字符串文字的更多信息 此处
In C++0x,
char16_tandchar32_twill be used to store UTF-16 and UTF-32 and notwchar_t.From the draft n2798:
The thing about
wchar_tis that it does not give you any guarantees about the encoding used. It is a type that can hold a multibyte character. Period. If you are going to write software now, you have to live with this compromise. C++0x compliant compilers are yet a far cry. You can always give the VC2010 CTP and g++ compilers a try for what it is worth. Moreover,wchar_thas different sizes on different platforms which is another thing to watch out for (2 bytes on VS/Windows, 4 bytes on GCC/Mac and so on). There is then options like-fshort-wcharfor GCC to further complicate the issue.The best solution therefore is to use an existing library. Chasing UNICODE bugs around isn't the best possible use of effort/time. I'd suggest you take a look at:
More on C++0x Unicode string literals here
暗暗地谢谢你。 我尚未注册，因此无法投票或直接回复评论。
我通过 codecvt 学到了一些东西。 我知道您建议的库，以下资源也可能有用 http://www. unicode.org/Public/PROGRAMS/CVTUTF/。
该项目是一个应该开源的库。 我更喜欢最小化与外部库的依赖关系。 我已经依赖 libgc 和 boost，尽管后来我只使用线程。 我真的更愿意坚持 C++ 标准，而且我对 GC 支持以某种方式被放弃感到有点失望。
显然 VC++ Express 2008 据称支持大部分 C++0x 标准以及 icc。 由于我目前使用VC++进行开发，距离发布库还需要一段时间，所以我想尝试一下使用codecvt和char32_t字符串。
有谁知道如何做到这一点 ？ 我应该提出另一个问题吗？
Thank you dirkgently. I'm not yet registered, so I can't upvote or respond directly as a comment.
I've learned something with codecvt. I knew about the libraries you suggest and the following resource may also be useful http://www.unicode.org/Public/PROGRAMS/CVTUTF/.
The project is for a library that should be open source. I would prefer minimizing the dependencies with external libraries. I already have a dependency with libgc and boost, though for the later I only use threads. I would really prefer to stick to the C++ standard and I'm a bit disappointed that GC supported has been somehow dropped.
Apparently VC++ express 2008 is said to support most of the C++0x standard as well as icc. Since I currently develop with VC++ and it will still take some time until the library would be released, I'd like to give a try to use codecvt and char32_t strings.
Does anyone know how to do this ? Should I post another question ?