source: lemon-main/doc/migration.dox @ 1200:73bd8d5200df

/* -*- mode: C++; indent-tabs-mode: nil; -*-
 *
 * This file is a part of LEMON, a generic C++ optimization library.
 *
 * Copyright (C) 2003-2009
 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 * (Egervary Research Group on Combinatorial Optimization, EGRES).
 *
 * Permission to use, modify and distribute this software is granted
 * provided that this copyright notice appears in all copies. For
 * precise terms see the accompanying LICENSE file.
 *
 * This software is provided "AS IS" with no warranty of any kind,
 * express or implied, and with no claim as to its suitability for any
 * purpose.
 *
 */

namespace lemon {
/*!

\page migration Migration from the 0.x Series

This guide gives an in depth description on what has changed compared
to the 0.x release series.

Many of these changes adjusted automatically by the
<tt>lemon-0.x-to-1.x.sh</tt> tool. Those requiring manual
update are typeset <b>boldface</b>.

\section migration-graph Graph Related Name Changes

- \ref concepts::Digraph "Directed graphs" are called \c Digraph and
  they have <tt>Arc</tt>s (instead of <tt>Edge</tt>s), while
  \ref concepts::Graph "undirected graphs" are called \c Graph
  (instead of \c UGraph) and they have <tt>Edge</tt>s (instead of
  <tt>UEdge</tt>s). These changes reflected thoroughly everywhere in
  the library. Namely,
  - \c Graph -> \c Digraph
    - \c %ListGraph -> \c ListDigraph, \c %SmartGraph -> \c SmartDigraph etc.
  - \c UGraph -> \c Graph
    - \c ListUGraph -> \c ListGraph, \c SmartUGraph -> \c SmartGraph etc.
  - \c Edge -> \c Arc, \c UEdge -> \c Edge
  - \c EdgeMap -> \c ArcMap, \c UEdgeMap -> \c EdgeMap
  - \c EdgeIt -> \c ArcIt, \c UEdgeIt -> \c EdgeIt
  - Class names and function names containing the words \c graph,
    \c ugraph, \e edge or \e arc should also be updated.
- <b>The two endpoints of an (\e undirected) \c Edge can be obtained by the
  <tt>u()</tt> and <tt>v()</tt> member function of the graph
  (instead of <tt>source()</tt> and <tt>target()</tt>). This change
  must be done by hand.</b>
  \n Of course, you can still use <tt>source()</tt> and <tt>target()</tt>
  for <tt>Arc</tt>s (directed edges).

\warning
<b>The <tt>lemon-0.x-to-1.x.sh</tt> script replaces the words \c graph,
\c ugraph, \c edge and \c uedge in your own identifiers and in
strings, comments etc. as well as in all LEMON specific identifiers.
So use the script carefully and make a backup copy of your source files
before applying the script to them.</b>

\section migration-lgf LGF tools
 - The \ref lgf-format "LGF file format" has changed,
   <tt>\@nodeset</tt> has changed to <tt>\@nodes</tt>,
   <tt>\@edgeset</tt> and <tt>\@uedgeset</tt> to <tt>\@arcs</tt> or
   <tt>\@edges</tt>, which become completely equivalents. The
   <tt>\@nodes</tt>, <tt>\@edges</tt> and <tt>\@uedges</tt> sections are
   removed from the format, the content of them should be
   the part of <tt>\@attributes</tt> section. The data fields in
   the sections must follow a strict format, they must be either character
   sequences without whitespaces or quoted strings.
 - The <tt>LemonReader</tt> and <tt>LemonWriter</tt> core interfaces
   are no longer available.
 - The implementation of the general section readers and writers has changed
   they are simple functors now. Beside the old
   stream based section handling, currently line oriented section
   reading and writing are also supported. In the
   section readers the lines must be counted manually. The sections
   should be read and written with the SectionWriter and SectionReader
   classes.
 - Instead of the item readers and writers, item converters should be
   used. The converters are functors, which map the type to
   std::string or std::string to the type. The converters for standard
   containers hasn't yet been implemented in the new LEMON. The converters
   can return strings in any format, because if it is necessary, the LGF
   writer and reader will quote and unquote the given value.
 - The DigraphReader and DigraphWriter can used similarly to the
   0.x series, however the <tt>read</tt> or <tt>write</tt> prefix of
   the member functions are removed.
 - The new LEMON supports the function like interface, the \c
   digraphReader and \c digraphWriter functions are more convenient than
   using the classes directly.

\section migration-search BFS, DFS and Dijkstra
- <b>Using the function interface of BFS, DFS and %Dijkstra both source and
  target nodes can be given as parameters of the <tt>run()</tt> function
  (instead of \c bfs(), \c dfs() or \c dijkstra() itself).</b>
- \ref named-templ-param "Named class template parameters" of \c Bfs,
  \c Dfs, \c Dijkstra, \c BfsVisit, \c DfsVisit are renamed to start
  with "Set" instead of "Def". Namely,
  - \c DefPredMap -> \c SetPredMap
  - \c DefDistMap -> \c SetDistMap
  - \c DefReachedMap -> \c SetReachedMap
  - \c DefProcessedMap -> \c SetProcessedMap
  - \c DefHeap -> \c SetHeap
  - \c DefStandardHeap -> \c SetStandardHeap
  - \c DefOperationTraits -> \c SetOperationTraits
  - \c DefProcessedMapToBeDefaultMap -> \c SetStandardProcessedMap

\section migration-error Exceptions and Debug tools

<b>The class hierarchy of exceptions has largely been simplified. Now,
only the i/o related tools may throw exceptions. All other exceptions
have been replaced with either the \c LEMON_ASSERT or the \c LEMON_DEBUG
macros.</b>

<b>On the other hand, the parameter order of constructors of the
exceptions has been changed. See \ref IoError and \ref FormatError for
more details.</b>

\section migration-other Others
- <b>The contents of <tt>graph_utils.h</tt> are moved to <tt>core.h</tt>
  and <tt>maps.h</tt>. <tt>core.h</tt> is included by all graph types,
  therefore it usually do not have to be included directly.</b>
- <b><tt>path_utils.h</tt> is merged to \c path.h.</b>
- <b>The semantic of the assignment operations and copy constructors of maps
  are still under discussion. So, you must copy them by hand (i.e. copy
  each entry one-by-one)</b>
- <b>The parameters of the graph copying tools (i.e. \c GraphCopy,
  \c DigraphCopy) have to be given in the from-to order.</b>
- \c copyDigraph() and \c copyGraph() are renamed to \c digraphCopy()
  and \c graphCopy(), respectively.
- <b>The interface of \ref DynArcLookUp has changed. It is now the same as
  of \ref ArcLookUp and \ref AllArcLookUp</b>
- Some map types should also been renamed. Namely,
  - \c IntegerMap -> \c RangeMap
  - \c StdMap -> \c SparseMap
  - \c FunctorMap -> \c FunctorToMap
  - \c MapFunctor -> \c MapToFunctor
  - \c ForkWriteMap -> \c ForkMap
  - \c StoreBoolMap -> \c LoggerBoolMap
- \c dim2::BoundingBox -> \c dim2::Box

*/
}