#### basic_deadline_timer::basic_deadline_timer

Constructor.

    explicit basic_deadline_timer(
        asio::io_context & io_context);
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Constructor to set a particular expiry time as an absolute time.

    basic_deadline_timer(
        asio::io_context & io_context,
        const time_type & expiry_time);
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Constructor to set a particular expiry time relative to now.

    basic_deadline_timer(
        asio::io_context & io_context,
        const duration_type & expiry_time);
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Move-construct a `basic_deadline_timer` from another.

    basic_deadline_timer(
        basic_deadline_timer && other);
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