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use std.textio.all;
entity sliding_index is
end entity;
architecture foo of sliding_index is
type integer_vector is array (natural range <>) of integer;
function to_string(inp: integer_vector) return string is
variable retn: line;
begin
for i in inp'range loop
if i = inp'RIGHT then
write (retn, integer'image(inp(i)));
else
write (retn, integer'image(inp(i)) & ',');
end if;
end loop;
return retn(1 to retn'length); -- the string value of the line
end function;
constant ivec: integer_vector := (1,2,3,4,5,6,7);
signal sum: integer_vector (ivec'range);
-- signal sum: integer_vector (0 to 6);
begin
sum <= (
0 => ( ivec(0) + ivec(1)),
1 => (ivec(0) + ivec(1) + ivec(2)),
2 => (ivec(1) + ivec(2) + ivec(3)),
3 => (ivec(2) + ivec(3) + ivec(4)),
4 => (ivec(3) + ivec(4) + ivec(5)),
5 => (ivec(4) + ivec(5) + ivec(6)),
6 => (ivec(5) + ivec(6) )
);
process
begin
wait for 0 ns;
report "ivec = " & to_string(ivec);
report "sum = " & to_string(sum);
wait;
end process;
end architecture;
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