The concepts __ConstBufferSequence__ and __MutableBufferSequence__ describe bidirectional ranges whose value type is convertible to `const_buffer` and `mutable_buffer` respectively. These sequences allow transacting with multiple buffers in a single function call, a technique called [@https://en.wikipedia.org/wiki/Vectored_I/O ['scatter/gather I/O]]. Buffers and buffer sequences are non-owning; copies produce shallow references and not duplicates of the underlying memory. Each of these statements declares a buffer sequence:
The concepts __ConstBufferSequence__ and __MutableBufferSequence__ describe bidirectional ranges whose value type is convertible to `const_buffer` and `mutable_buffer` respectively. These sequences allow transacting with multiple buffers in a single function call, a technique called [@https://en.wikipedia.org/wiki/Vectored_I/O ['scatter/gather I/O]]. Buffers and buffer sequences are non-owning; copies produce shallow references and not duplicates of the underlying memory. Each of these statements declares a buffer sequence:
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