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#### Array Container

Where the standard library provides `std::array<>`, Boost.Asio:

- Provides overloads for the buffer() function.
- Uses it in preference to `boost::array<>` for the ip::address_v4::bytes_type and ip::address_v6::bytes_type types.
- Uses it in preference to `boost::array<>` where a fixed size array type is needed in the implementation.

Support for `std::array<>` is automatically enabled for `g++` 4.3 and later, when the `-std=c++0x` or `-std=gnu++0x` compiler options are used, as well as for Microsoft Visual C++ 10. It may be disabled by defining `BOOST_ASIO_DISABLE_STD_ARRAY`, or explicitly enabled for other compilers by defining `BOOST_ASIO_HAS_STD_ARRAY`.