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Coding Style Convention
-------------------------
This document describes the coding style convention
used in KPovModeler.
Author: Andreas Zehender <zehender@kde.org>
Date: 16 June 2001
If you edit existing files or create new ones, please follow this convention.
This ensures that the code is consistent and clear.
1) Indentation
--------------
- Use 3 spaces as basic offset. Do not use tabs for indentation.
- Do not indent access keywords (public, protected, private) as
well as signal/slot keywords.
- Do not indent braces.
- Put braces in separate lines.
- Indent case statements.
Example:
class abcd
{
public:
void someMethod( );
};
void abcd::someMethod( )
{
if( 1 == 2 )
{
}
else
{
switch( x )
{
case 1:
y = 2;
break;
default:
y = -2;
}
}
}
2) Spacing
----------
Use many spaces.
Use it
- before and after brackets
- before and after operators
- after commas
Examples:
a = someMethod( ); // Notice the space between the brackets!
b = anotherMethod( ( a + b ) / 2, 3 ) || 23456;
if( ( a == 2 ) && !b )
3) Type Modifiers (Pointers and References)
-------------------------------------------
Put type modifiers behind the type, not before the variable name.
Example:
const QString& type;
PMObject* obj;
4) Names
--------
Variables:
----------
Member variables begin with "m_".
Static variables begin with "s_".
Member pointers begin with "m_p".
All variables begin with a lower case (member variables after the "m_").
Use upper case character to separate different words.
Examples:
class abcd
{
int m_firstMember;
char* m_pFirstMember;
static const char* s_pAStaticPointerToConstCharThatMeansItIsAString;
};
void abcd::efgh( )
{
int aLocalVariable;
}
Classes:
--------
All classes start with "PM" and a upper case character.
Methods:
--------
All methods start with a lower case character.
Set methods begin with "set".
Get methods do NOT begin with "get".
Examples:
int PMSPhere::centre( ) const;
void PMSphere::setCentre( );
5) KDoc Comments
----------------
Use KDoc comments to document classes.
Don't add a description if you just overload a virtual function
that doesn't add some functionality.
Example:
/** Returns the internal object name (not i18n'ed) */
virtual PMObject::className( ) const;
/** */
virtual PMSphere::className( ) const;
KDoc will then generate the following output:
<documentation>
PMObject* newObject ( )
[const virtual]
Reimplemented from PMObject.
</documentation>
6) Long Lines
--------------
Try to use only 80 characters per line.
7) Sample .emacs File
---------------------
Here is a sample .emacs file. It is a mix of several files, so some
things are set multiple times. But it works :-)
<.emacs>
(defconst my-c-style
'((c-tab-always-indent . t)
(c-comment-only-line-offset . 0)
(c-hanging-braces-alist . ((substatement-open after)
(brace-list-open)))
(c-hanging-colons-alist . ((member-init-intro before)
(inher-intro)
(case-label after)
(label after)
(access-label after)))
(c-cleanup-list . (scope-operator
empty-defun-braces
defun-close-semi))
(c-offsets-alist . ((arglist-close . c-lineup-arglist)
(substatement-open . 0)
(case-label . +)
(block-open . 0)
(knr-argdecl-intro . -)
(inline-open . 0)))
(c-echo-syntactic-information-p . t)
)
"My C Programming Style")
;; Customizations for all of c-mode, c++-mode, and objc-mode
(defun my-c-mode-common-hook ()
;; add my personal style and set it for the current buffer
(c-add-style "PERSONAL" my-c-style t)
;; offset customizations not in my-c-style
(c-set-offset 'member-init-intro '++)
;; other customizations
(set tab-width 8
;; this will make sure spaces are used instead of tabs
indent-tabs-mode nil)
(set c-basic-offset 3)
;; we like auto-newline and hungry-delete
(c-toggle-hungry-state 1)
;; keybindings for C, C++, and Objective-C. We can put these in
;; c-mode-map because c++-mode-map and objc-mode-map inherit it
(define-key c-mode-map [f9] 'compile)
(define-key c-mode-map [return] 'newline-and-indent)
(define-key c++-mode-map [f9] 'compile)
(define-key c++-mode-map [return] 'newline-and-indent)
(define-key java-mode-map [f9] 'compile)
(define-key java-mode-map [return] 'newline-and-indent)
(load-library "vc")
;;for QT
(set c-C++-access-key "\\<\\(Q_SIGNALS\\|public\\|protected\\|private
\\|public Q_SLOTS\\|protected Q_SLOTS\\|private Q_SLOTS\\)\\>[ \t]*:")
;; modify the colour of Q_SLOTS to match public, private, etc ...
(font-lock-add-keywords 'c++-mode
'(("\\<\\(Q_SLOTS\\|Q_SIGNALS\\)\\>" . font-lock-type-face)))
;; make new font for rest of qt keywords
(make-face 'qt-keywords-face)
(set -face-foreground 'qt-keywords-face "green")
;; qt keywords
(font-lock-add-keywords 'c++-mode
'(("\\<Q_OBJECT\\>" . 'qt-keywords-face)))
(font-lock-add-keywords 'c++-mode
'(("\\<SIGNAL\\|SLOT\\>" . 'qt-keywords-face)))
(font-lock-add-keywords 'c++-mode
'(("\\<Q[A-Z][A-Za-z]*" . 'qt-keywords-face)))
)
(set auto-mode-alist
(append '(("\\.h$" . c++-mode)) auto-mode-alist))
</.emacs>
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