syntax error near if in VHDL

Question

Hi I am trying to write a code in VHDL and I get syntax error near "end" / "if". I am not very good at nested if statements and have not figured out how to close those if statements in what order due to lack of internet sources. I am pretty sure that errors I receive are due to if statements, especially due to those which are not properly closed. How can I overcome this problem and continue my project? Here is a code segment I am getting error from. I wrote //ERROR HERE// to denote where an error occurs.

 SHOW : process (clk, rst) is
 begin -- process SHOW
 if rst = '1' then
 processed_pic <= def_pic;
 cursor_pos_x <= 0;
 cursor_pos_y <= 0;
 elsif clk'event and clk = '1' then
 if (visible = '1') and ( pos_x < 250) and (pos_y <250) and (pos_x > -1) 
 and (pos_y > -1) then
 if((pos_y = cursor_pos_y) and ((pos_x > cursor_pos_x -1) or (pos_x < 
 cursor_pos_x + height ))) or ((pos_y = cursor_pos_y + height -1) and 
 ((pos_x > cursor_pos_x -1) or (pos_x < cursor_pos_x + height))) then
 vgaData <= "00000000000";
 data_r <= vgaData(3*COLOR_BIT-1 downto 2*COLOR_BIT);
 data_g <= vgaData(2*COLOR_BIT-1 downto COLOR_BIT);
 data_b <= vgaData(COLOR_BIT-1 downto 0)
 //ERROR HERE// if ((pos_x = cursor_pos_x) and ((pos_y > cursor_pos_y - 1) or (pos_y < 
 cursor_pos_y + height))) or ((pos_x = cursor_pos_x + height -1) and 
 ((pos_y > cursor_pos_y - 1) or (pos_y < cursor_pos_y + height))) then
 vgaData <= "00000000000";
 data_r <= vgaData(3*COLOR_BIT-1 downto 2*COLOR_BIT);
 data_g <= vgaData(2*COLOR_BIT-1 downto COLOR_BIT);
 data_b <= vgaData(COLOR_BIT-1 downto 0)
 //ERROR HERE //end if;
 else 
 vgaData <= processed_pic(pos_x,pos_y);
 data_r <= vgaData(3*COLOR_BIT-1 downto 2*COLOR_BIT);
 data_g <= vgaData(2*COLOR_BIT-1 downto COLOR_BIT);
 data_b <= vgaData(COLOR_BIT-1 downto 0)
 //ERROR HERE //if ((pos_x > 249) and (pos_y > -1)) or ((pos_y > 249) and ((pos_x > -1) 
 or (pos_x < 250))) then
 vgaData <= "000000001111"; -- mavi
 data_r <= vgaData(3*COLOR_BIT-1 downto 2*COLOR_BIT);
 data_g <= vgaData(2*COLOR_BIT-1 downto COLOR_BIT);
 data_b <= vgaData(COLOR_BIT-1 downto 0);
 end if;
 end if;
 end if;
 end process SHOW;

• user16324: // is not a comment, and there are some missing semicolons. Apart from that, this isn't a complete compilable file and you've not told us what the error messages actually say.
• OnurTR: //ERROR HERE// is what I wrote above. It is not in the code. Error message says syntax error near "if". I added some semicolons and I kind of got rid of errors. However, now I am getting "expecting type void for SHOW" error.
• TonyM: Use proper indentation, of which there is plenty about on the Internet. Good presentation will help you spot errors in your design more easily. And those that have to use and maintain it after you. I recommend setting your Tabs to inserting two spaces, enough spacing to show structure without wasting screen space. Keep lines to 100 characters or less, which ensures they can be seen on screen easily and printed on A4 in 9pt. With good indentation showing structure, you'll see the unbalanced 'if's.

Answer 1

Each of the lines preceding an error is missing a semicolon at the end, e.g.

data_b <= vgaData(COLOR_BIT-1 downto 0)
 ^^^