package system_types is
-- code from book
type system_status is (idle, active, overloaded);
-- end code from book
end package system_types;
entity ch_09_03 is
end entity ch_09_03;
----------------------------------------------------------------
architecture test of ch_09_03 is
-- code from book
alias status_type is work.system_types.system_status;
-- end code from book
begin
process_09_2_b : process is
variable status : status_type := idle;
begin
wait for 10 ns;
status := active;
wait for 10 ns;
status := overloaded;
wait;
end process process_09_2_b;
end architecture test;
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