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### buffer_size

The `boost::asio::buffer_size` function determines the total number of bytes in a buffer or buffer sequence.

    std::size_t buffer_size(
        const mutable_buffer & b);
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    std::size_t buffer_size(
        const mutable_buffers_1 & b);
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    std::size_t buffer_size(
        const const_buffer & b);
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    std::size_t buffer_size(
        const const_buffers_1 & b);
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    template<
        typename BufferSequence>
    std::size_t buffer_size(
        const BufferSequence & b);
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##### Requirements

Header: `boost/asio/buffer.hpp`

Convenience header: `boost/asio.hpp`