code-style.md

@@ -45,7 +45,8 @@ Many of the rules of the [FreeBS kernel style](https://www.freebsd.org/cgi/man.c
     * Should a template if a template situation occur (e.g. to avoid errors when working with `foreach`).
 
 * preprocessor statements
-  * We use `#ifndef _HEADER_FILE_H_` as header guards (for file header_file.h). Leading and trailing underscore is mandatory.
+  * We used `#ifndef _HEADER_FILE_H_` as header guards (for file header_file.h). Leading and trailing underscore were mandatory.
+  * Nowadays we use a `#pragma once` header guards.
   * The `#endif` statement is followed by comment specifying corresponding `#ifdef` or `#if` statement (i.e. `#endif \* _HEADER_FILE_H_ *\`)
   * We use `#else` statements followed by a comment with the negation of the condition that leads to the else statement.
   * We prefer C-style commentaries.
@@ -74,13 +75,17 @@ Many of the rules of the [FreeBS kernel style](https://www.freebsd.org/cgi/man.c
 * function and variable declaration and definition
   * **Never** declare or define functions with empty brackets. Always use `void`.
   * When defining/declaring a reference or pointer, **always** attach the `*` or `&` to the variable:
-    * `void func(struct A *a)` (**not** `void func(struct A* a)` nor `void func(struct A * a)`)
-    * `const MyClass &ref` (**not** `const MyClass& ref` nor `const MyClass & ref`)
-    * `int *func(void)` (**not** `int* func(void)` nor `int * func(void)`)
+    * `void func(struct A *a)` (**not** `void func(struct A* a)` **nor** `void func(struct A * a)`)
+    * `const MyClass &ref` (**not** `const MyClass& ref` **nor** `const MyClass & ref`)
+    * `int *func(void)` (**not** `int* func(void)` **nor** `int * func(void)`)
   * When defining default parameter, then always put a single space around the `=`.
     * `void func(int i = 0)` (**not** `void func(int i=0)`)
   * There must not be a space between a function name and the opening bracket.
 
+* type casting
+  * When casting types to different types always attach the closing parenthesis directly to the cast value/variable:
+    * `(unsigned long)a` (**not** `(unsigned long) a`)
+
 ## Doxygen
 
 * The style is a mix of the Qt and Java style.