library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
use std.textio.all;

package pkg is
    impure function f1(
        path : string
    ) return string;

    impure function f1(
        file f : text
    ) return string;
end package pkg;

package body pkg is
    impure function f1(
        path : string
    ) return string is
        file f : text open read_mode is path;
    begin
        return f1(f);
    end function;
    impure function f1(
        file f : text
    ) return string is
        variable ef : boolean := false;

    begin
        ef := endfile(f);
        if (ef = TRUE) then
            return "true";
        else
            return "false";
        end if;
    end function;

end package body pkg;