On Sat, 15 Jan 2011 17:04:24 +0000 Alexander Lamaison <awl03@doc.ic.ac.uk> wrote:
On Sat, 15 Jan 2011 10:08:22 -0500, Chad Nelson wrote:
On Fri, 14 Jan 2011 10:59:09 -0500 Dave Abrahams <dave@boostpro.com> wrote:
Also, is there any use in trying to get the difference into the type system, e.g. by using some kind of wrapper over std::string that gives it a distinct "utf-8" type?
The system I'm now using for my programs might interest you.
I have four classes: ascii_t, utf8_t, utf16_t, and utf32_t.
... snip
There are some parts of the code that could use polishing, but I like the overall design, and I'm finding it pretty easy to work with. Anyone interested in seeing the code?
Yes please!
http://www.oakcircle.com/toolkit.html I've released it under the Boost license, so anyone may use it as they wish. I think one part of os.cpp uses a class from the library that I didn't include, but it's minor and can easily be replaced with one of the Boost.Random classes instead. Everything else should work stand-alone. It's pretty well documented, but ask me if you have any questions.
This sounds roughly like the solution I'd been imagining where, for instance, boost::filesystem::path has string and wstring contructors that work as they do now but also has path(utf8_string) constructors that must be called like this:
std::string system_encoded_text = some_non_utf8_aware_library_call(); filesystem::path utf8_file_path(boost::utf8_string(system_encoded_text));
The utf8_string class would do the conversion from the system encoding.
That's how I designed it. :-) -- Chad Nelson Oak Circle Software, Inc. * * *