Print to STDOUT using REPORT Statement in VHDL

REPORT Statement  Usage :-

Report statement is used for printing debug messages to STDOUT (Best way for logging messages is to use textio package. It has print to STDOUT or FILE option ).

Note on T'Image(x) attribute :-

a textual representation of the value x of type T is returned.
usage :  T'Image(x)
Eg. integer'image(A)
return type : string

(A) To print integer value to STDOUT using REPORT :-

        variable A : integer :=10;
        report "A value is" & integer'image(A);
        output  >  A value is 10

(B) To print std_logic type values to STDOUT using REPORT :-

        variable B : std_logic := '1';
        report "B value is" & std_logic'image(B);
        output > B value is 1

(C) To print std_logic_vector type values to STDOUT using REPORT :-

       '&' operator is used for concatenation.
       variable vectB : std_logic_vector(3 downto 0) := "1000";
       for i in 0 to vectB'LENGTH loop
            report "vectB("&integer'image(i)&") value is" &   
                  std_logic'image(vectB(i));
       end loop;
        output >   vectB(0) value is 0
                       vectB(1) value is 0
                       vectB(2) value is 0
                       vectB(3) value is 1