cin.readsome and MinGW

[vin]

In visual c++ express 2008 cin.readsome reads and stores the number of characters available and returns the number of characters stored.

cin.readsome in MinGW (ZinjaI or Code::Blocks edu portable or the latest Orwell DevC++) always returns 0 (no characters stored).

My searching found articles that said this is a bug in libstdc++ and articles that said that this was an implementation difference.

So does anyone know whether it is a bug or just a different implementation?

[MiiNiPaa]

http://en.cppreference.com/w/cpp/io/basic_istream/readsome

The behavior of this function is highly implementation-specific.
[...]
Likewise, a call to std::cin.readsome() may return all pending unprocessed console input, or may always return zero and extract no characters.