Whitespace Rules
whitespace_001
This rule check for trailing spaces.
Violation
Where periods indicate spaces:
library ieee;....
Fix
library ieee;
whitespace_002
This rule will check for the existence of tabs in the middle of a line.
Violation
\t\tsignal wr_en\t:\tstd_logic; --\tWrite Enable
Fix
\t\tsignal wr_en : std_logic; -- Write Enable
whitespace_003
This rule checks for spaces before semicolons.
Violation
wr_en : in std_logic ;
Fix
wr_en : in std_logic;
whitespace_004
This rule checks for spaces before commas.
Violation
wr_en => wr_en ,
rd_en => rd_en,
Fix
wr_en => wr_en,
rd_en => rd_en,
whitespace_005
This rule checks for spaces after an open parenthesis.
Note
Spaces before numbers are allowed.
Violation
signal data : std_logic_vector(31 downto 0);
signal byte_enable : std_logic_vector( 3 downto 0);
signal width : std_logic_vector( g_width - 1 downto 0);
Fix
signal data : std_logic_vector(31 downto 0);
signal byte_enable : std_logic_vector( 3 downto 0);
signal width : std_logic_vector(g_width - 1 downto 0);
whitespace_006
This rule checks for spaces before a close parenthesis.
Violation
signal data : std_logic_vector(31 downto 0 );
signal byte_enable : std_logic_vector( 3 downto 0 );
signal width : std_logic_vector(g_width - 1 downto 0);
Fix
signal data : std_logic_vector(31 downto 0);
signal byte_enable : std_logic_vector( 3 downto 0);
signal width : std_logic_vector(g_width - 1 downto 0);
whitespace_007
This rule checks for spaces after a comma.
Refer to Configuring Whitespace Rules for options on changing the number of whitespaces..
Violation
proc : process (wr_en,rd_en,overflow) is
Fix
proc : process (wr_en, rd_en, overflow) is
whitespace_008
This rule checks for spaces after the std_logic_vector keyword.
Violation
signal data : std_logic_vector (7 downto 0);
signal counter : std_logic_vector (7 downto 0);
Fix
signal data : std_logic_vector(7 downto 0);
signal counter : std_logic_vector(7 downto 0);
whitespace_010
This rule checks for spaces before and after the concatenate (&) operator.
Violation
a <= b&c;
Fix
a <= b & c;
whitespace_011
This rule checks for at least a single space before and after math operators +, -, /, * and **.
Violation
a <= b+c;
a <= b-c;
a <= b/c;
a <= b*c;
a <= b**c;
a <= (b+c)-(d-e);
Fix
a <= b + c;
a <= b - c;
a <= b / c;
a <= b * c;
a <= b ** c;
a <= (b + c) - (d - e);
whitespace_012
This rule was a duplicate of whitespace_200 and has been removed.
whitespace_013
This rule checks for at least a single space before and after logical operators.
Violation
if (a = '1')and(b = '0')
if (a = '0')or (b = '1')
Fix
if (a = '1') and (b = '0')
if (a = '0') or (b = '1')
whitespace_100
This rule checks for at least a single space before and after relational operators.
Violation
if readAddr>=writeAddr then
if readAddr >= writeAddr then
Fix
if readAddr >= writeAddr then
if readAddr >= writeAddr then
whitespace_200
This rule enforces a maximum number of consecutive blank lines.
Refer to Configuring Consecutive Blank Line Rules for more information.
Violation
a <= b;
c <= d;
Fix
a <= b;
c <= d;