Comparator using "when" "else" (Dataflow)

library IEEE;
use IEEE.STD_LOGIC_1164.ALL;


entity comprtr is
    Port ( a,b : in  STD_LOGIC_VECTOR(2 downto 0);
           e,l,g : out  STD_LOGIC);
end comprtr;


architecture Dataflow of comprtr is

begin
e<='1' when a=b else '0';
l<='1' when a<b else '0';
g<='1' when a>b else '0';
end Dataflow;