File: codingstyle.h

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/***************************************************************************
 * Copyright (C) 2013 by Pablo Daniel Pareja Obregon                       *
 *                                                                         *
 * This is free software; you can redistribute it and/or modify            *
 * it under the terms of the GNU General Public License as published by    *
 * the Free Software Foundation; either version 2, or (at your option)     *
 * any later version.                                                      *
 *                                                                         *
 * This software is distributed in the hope that it will be useful,        *
 * but WITHOUT ANY WARRANTY; without even the implied warranty of          *
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           *
 * GNU General Public License for more details.                            *
 *                                                                         *
 * You should have received a copy of the GNU General Public License       *
 * along with this package; see the file COPYING.  If not, write to        *
 * the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,   *
 * Boston, MA 02110-1301, USA.                                             *
 ***************************************************************************/

namespace Caneda
{
/*!
 * \page CodingStylePage Caneda Coding Style
 *
 * \tableofcontents
 *
 * Extracted from Arora Coding Style. Feel free to edit to our needs.
 *
 * \section Introduction Introduction
 *
 * Caneda uses the same coding style as Qt.  If you use the git_hooks there is
 * a pre-commit_checkstyle that will warn you of style errors.  Keeping the
 * code consistant is important for readability both for fixing bugs and
 * bringing in new developers. Base all dialogs on .ui files (ie create them
 * using Qt Designer) so that layouts can be perfected effectively.
 * SaveDocumentsDialog is an example for this.
 *
 * \subsection Indentation Indentation
 * \li 4 spaces are used for indentation
 * \li Spaces, not tabs!
 *
 * \subsection DeclaringVariables Declaring variables
 * \li Declare each variable on a separate line
 * \li Avoid short (e.g., a,rbarr,nughdeget) names whenever possible
 * \li Single character variable names are only okay for counters and
 * temporaries, where the purpose of the variable is obvious
 * \li Wait with declaring a variable until it is needed
 *
 * \code{.cpp}
 * // Wrong
 * int a, b;
 * char *c, *d;
 * \endcode
 *
 * \code{.cpp}
 * // Correct
 * int height;
 * int width;
 * char *nameOfThis;
 * char *nameOfThat;
 * \endcode
 *
 * \li Variables and functions start with a small letter. Each consecutive word
 * in a variable's name starts with a capital letter
 * \li Avoid abbreviations
 *
 * \code{.cpp}
 * // Wrong
 * short Cntr;
 * char ITEM_DELIM = '\t';
 * \endcode
 *
 * \code{.cpp}
 * // Correct
 * short counter;
 * char itemDelimiter = '\t';
 * \endcode
 *
 * \li Classes always start with a big letter.
 *
 * \subsection Whitespace Whitespace
 * \li Use blank lines to group statements together where suited
 * \li Always use only one blank line
 * \li Always use a single space after a keyword, and before a curly brace.
 *
 * \code{.cpp}
 * // Wrong
 * if(foo){
 * }
 * \endcode
 *
 * \code{.cpp}
 * // Correct
 * if (foo) {
 * }
 * \endcode
 *
 * \li For pointers or references, always use a single space before * or &,
 * but never after. Exception: template parameters - use no space before and no
 * space after * or &.
 * \li No space after a cast.
 * \li Avoid C-style casts when possible.
 *
 * \code{.cpp}
 * // Wrong
 * char* blockOfMemory = (char* ) malloc(data.size());
 * \endcode
 *
 * \code{.cpp}
 * // Correct
 * char *blockOfMemory = (char *)malloc(data.size());
 * char *blockOfMemory = reinterpret_cast<char*>(malloc(data.size()));
 * \endcode
 *
 * \subsection Braces Braces
 * \li As a base rule, the left curly brace goes on the same line as the start
 * of the statement:
 *
 * \code{.cpp}
 * // Wrong
 * if (codec)
 * {
 * }
 * \endcode
 *
 * \code{.cpp}
 * // Correct
 * if (codec) {
 * }
 * \endcode
 *
 * \li Exception: Function implementations and class declarations always have
 * the left brace on the start of a line:
 *
 * \code{.cpp}
 * static void foo(int g)
 * {
 *     qDebug("foo: %i", g);
 * }
 * \endcode
 *
 * \code{.cpp}
 * class Moo
 * {
 * };
 * \endcode
 *
 * \li Use curly braces when the body of a conditional statement contains more
 * than one line, and also if a single line statement is somewhat complex.
 *
 * \code{.cpp}
 * // Wrong
 * if (address.isEmpty()) {
 *     return false;
 * }
 *
 * for (int i = 0; i < 10; ++i) {
 *     qDebug("%i", i);
 * }
 * \endcode
 *
 * \code{.cpp}
 * // Correct
 * if (address.isEmpty())
 *     return false;
 *
 * for (int i = 0; i < 10; ++i)
 *     qDebug("%i", i);
 * \endcode
 *
 * \li Exception 1: Use braces also if the parent statement covers several
 * lines / wraps
 *
 * \code{.cpp}
 * // Correct
 * if (address.isEmpty() || !isValid()
 *     || !codec) {
 *     return false;
 * }
 * \endcode
 *
 * \li Exception 2: Use braces also in if-then-else blocks where either the
 * if-code or the else-code covers several lines
 *
 * \code{.cpp}
 * // Wrong
 * if (address.isEmpty())
 *     return false;
 * else {
 *     qDebug("%s", qPrintable(address));
 *     ++it;
 * }
 * \endcode
 *
 * \code{.cpp}
 * // Correct
 * if (address.isEmpty()) {
 *     return false;
 * } else {
 *     qDebug("%s", qPrintable(address));
 *     ++it;
 * }
 * \endcode
 *
 * \code{.cpp}
 * // Wrong
 * if (a)
 *     if (b)
 *         ...
 *     else
 *         ...
 * \endcode
 *
 * \code{.cpp}
 * // Correct
 * if (a) {
 *     if (b)
 *         ...
 *     else
 *         ...
 * }
 * \endcode
 *
 * \li Use curly braces when the body of a conditional statement is empty
 *
 * \code{.cpp}
 * // Wrong
 * while (a);
 * \endcode
 *
 * \code{.cpp}
 * // Correct
 * while (a) {}
 * \endcode
 *
 * \subsection Parentheses Parentheses
 * \li Use parentheses to group expressions:
 *
 * \code{.cpp}
 * // Wrong
 * if (a && b || c)
 * \endcode
 *
 * \code{.cpp}
 * // Correct
 * if ((a && b) || c)
 * \endcode
 *
 * \code{.cpp}
 * // Wrong
 * a + b & c
 * \endcode
 *
 * \code{.cpp}
 * // Correct
 * (a + b) & c
 * \endcode
 *
 * \subsection SwitchStatements Switch statements
 * \li The case labels are on the same column as the switch
 * \li Every case must have a break (or return) statement at the end or a
 * comment to indicate that there's intentionally no break
 *
 * \code{.cpp}
 * switch (myEnum) {
 *     case Value1:
 *         doSomething();
 *         break;
 *     case Value2:
 *         doSomethingElse();
 *         // fall through
 *     default:
 *         defaultHandling();
 *         break;
 * }
 * \endcode
 *
 * \subsection LineBreaks Line breaks
 * \li Keep lines shorter than 100 characters; insert line breaks if necessary.
 * \li Commas go at the end of a broken line; operators start at the beginning
 * of the new line. The operator is at the end of the line to avoid having to
 * scroll if your editor is too narrow.
 *
 * \code{.cpp}
 * // Correct
 * if (longExpression
 *     + otherLongExpression
 *     + otherOtherLongExpression) {
 * }
 * \endcode
 *
 * \code{.cpp}
 * // Wrong
 * if (longExpression +
 *     otherLongExpression +
 *     otherOtherLongExpression) {
 * }
 * \endcode
 *
 * \subsection ForwardDeclarations Forward declarations
 * Use forward declaration when possible. Suppose you want to define a new
 * class B that uses objects of class A. If B only uses references or pointers
 * to A, use forward declarations (you don't need to include <A.h> in the
 * header, but include it in the cpp). This will in turn speed a little bit the
 * compilation.
 *
 * \code{.cpp}
 * class A ;
 *
 * class B {
 *   private:
 *       A *fPtrA;
 *   public:
 *       void mymethod(const& A) const;
 * };
 * \endcode
 *
 * B derives from A or B explicitely (or implicitely) uses objects of class A.
 * You then need to include <A.h>
 *
 * \code{.cpp}
 * #include <A.h>
 *
 * class B : public A{
 *
 * };
 *
 * class C {
 *   private:
 *       A fA;
 *   public:
 *       void mymethod(A par);
 * }
 * \endcode
 *
 * \section GeneralException General exception
 * Feel free to break a rule if it makes your code look bad.
 *
 */

} // namespace Caneda