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entity case4 is
end;
architecture behav of case4 is
subtype bv4 is bit_vector (1 to 4);
type vec2 is array (natural range <>) of bv4;
constant vects : vec2 := (x"0", x"3", x"9", x"4", x"a");
procedure print (msg : string; t : time) is
begin
report msg;
wait for t;
end print;
begin
process
begin
for i in vects'range loop
case bv4'(vects (i)) is
when "0100" =>
print ("value is 4", 4 ns);
print ("yes, really 4", 4 ns);
when "0011" =>
print ("value is 3", 3 ns);
when "0101" =>
print ("value is 5", 5 ns);
when others =>
print ("unknown value", 0 ns);
end case;
end loop;
report "SUCCESS";
wait;
end process;
end behav;
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