Request json_parser::read_json(boost::filesystem::path const&, ...)

[mfsv]

There are currently two signatures available:

• read_json(std::string const&, ...)
• read_json(std::basic_istream<...> const&, ...)

In case of Windows and a file name with non-standard characters I cannot rely on read_json(std::string const&, ...).

I therefore use this workaround:
boost::filesystem::path const filename(L"Some foreign language file name");
boost::filesystem::ifstream ifs(filename);
read_json(ifs, ...);

In case of an error, the exception thrown does not contain the filename and I have to construct a message of my own.

I would like to request these additions:

• read_json(boost::filesystem::path const&, ...)
• read_json(std::wstring const&, ...)