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transfer_all

Return a completion condition function object that indicates that a read or write operation should continue until all of the data has been transferred, or until an error occurs.

unspecified transfer_all();

This function is used to create an object, of unspecified type, that meets CompletionCondition requirements.

Example

Reading until a buffer is full:

boost::array<char, 128> buf;
boost::system::error_code ec;
std::size_t n = boost::asio::read(
    sock, boost::asio::buffer(buf),
    boost::asio::transfer_all(), ec);
if (ec)
{
  // An error occurred.
}
else
{
  // n == 128
}

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