#### basic_signal_set::add

Add a signal to a signal_set.

    void add(
        int signal_number);
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    void add(
        int signal_number,
        asio::error_code & ec);
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Add a signal to a signal_set with the specified flags.

    void add(
        int signal_number,
        flags_t f);
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    void add(
        int signal_number,
        flags_t f,
        asio::error_code & ec);
      » more...