diff --git a/includes/enum.h b/includes/enum.h
index aaabfa8..6566224 100644
--- a/includes/enum.h
+++ b/includes/enum.h
@@ -6,7 +6,7 @@
 /*   By: mdekker/jde-baai <team@codam.nl>             +#+                     */
 /*                                                   +#+                      */
 /*   Created: 2023/07/13 17:41:00 by mdekker/jde   #+#    #+#                 */
-/*   Updated: 2023/11/20 20:59:54 by mdekker/jde   ########   odam.nl         */
+/*   Updated: 2023/11/22 23:15:29 by mdekker/jde   ########   odam.nl         */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -72,7 +72,7 @@ typedef enum e_error
 	COMMAND_NOT_FOUND = 127,
 	NOT_VALID = 128,
 	UNEXPECTED_EOF = 130,
-	SYNTAX_ERROR = 258,
+	SYNTAX_ERROR = 2,
 }	t_error;
 
 /**
diff --git a/src/checker/index.c b/src/checker/index.c
index 0a917af..4f66fa8 100644
--- a/src/checker/index.c
+++ b/src/checker/index.c
@@ -6,12 +6,20 @@
 /*   By: mdekker/jde-baai <team@codam.nl>             +#+                     */
 /*                                                   +#+                      */
 /*   Created: 2023/08/02 16:57:32 by mdekker/jde   #+#    #+#                 */
-/*   Updated: 2023/11/21 14:48:16 by mdekker       ########   odam.nl         */
+/*   Updated: 2023/11/22 23:20:04 by mdekker/jde   ########   odam.nl         */
 /*                                                                            */
 /* ************************************************************************** */
 
 #include <minishell.h>
 
+/**
+ * @brief Checks if there are two of the same operators next to each other
+ *
+ * @param found The found vector containing the found items
+ * @param data The shell struct containing the token vector
+ * @return true When there are no double operators
+ * @return false When there are double operators
+ */
 static bool	check_double_ops(t_vector *found, t_shell *data)
 {
 	t_found	*c_found;
@@ -30,7 +38,7 @@ static bool	check_double_ops(t_vector *found, t_shell *data)
 		if (next_found->index - c_found->index == 1)
 			if (c_token->type == n_token->type)
 				return (set_err(SYNTAX, type_symbol(c_token->type), data),
-					false);
+						false);
 		i++;
 	}
 	return (true);
@@ -83,9 +91,9 @@ static bool	check_ops(t_vector *found, t_shell *data)
 			n_token = (t_token *)vec_get(&data->token_vec, c_found->index + 1);
 			if (!n_token || n_token->type != STRING)
 				return (set_err(SYNTAX, type_symbol(c_token->type), data),
-					false);
+						false);
 			else if (!combine_tokens(&data->token_vec, c_found->index,
-					c_token->type))
+						c_token->type))
 				return (false);
 			else
 				vec_apply(found, decrement_index);
@@ -95,6 +103,14 @@ static bool	check_ops(t_vector *found, t_shell *data)
 	return (true);
 }
 
+/**
+ * @brief Checks the first and last token to see if they are valid
+ *
+ * @param found The found vector containing the found items
+ * @param data The shell struct containing the token vector
+ * @return true When the first and last token are valid
+ * @return false When the first and last token are invalid
+ */
 static bool	check_bounds(t_vector *found, t_shell *data)
 {
 	t_found	*first;
@@ -115,6 +131,15 @@ static bool	check_bounds(t_vector *found, t_shell *data)
 	return (true);
 }
 
+/**
+ * @brief The main function that checks the token vector for syntax errors
+ * uses vec_find to find all the operators in the token vector and then
+ * proceeds to check if there are any syntax errors that can be found
+ *
+ * @param data The shell struct containing the token vector
+ * @return true When there are no syntax errors
+ * @return false When there are syntax errors
+ */
 bool	check_tokens(t_shell *data)
 {
 	t_vector	*found;