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gecode
gist
nodevisitor.hpp
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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
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/*
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* Main authors:
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* Guido Tack <tack@gecode.org>
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*
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* Copyright:
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* Guido Tack, 2006
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*
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* This file is part of Gecode, the generic constraint
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* development environment:
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* http://www.gecode.org
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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namespace
Gecode
{
namespace
Gist {
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template
<
class
Cursor>
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forceinline
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NodeVisitor<Cursor>::NodeVisitor
(
const
Cursor& c0) : c(c0) {}
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template
<
class
Cursor>
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forceinline
void
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NodeVisitor<Cursor>::setCursor
(
const
Cursor& c0) { c = c0; }
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template
<
class
Cursor>
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forceinline
Cursor&
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NodeVisitor<Cursor>::getCursor
(
void
) {
return
c; }
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template
<
class
Cursor>
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forceinline
void
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PostorderNodeVisitor<Cursor>::moveToLeaf
(
void
) {
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while
(c.mayMoveDownwards()) {
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c.moveDownwards();
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}
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}
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template
<
class
Cursor>
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PostorderNodeVisitor<Cursor>::PostorderNodeVisitor
(
const
Cursor& c0)
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:
NodeVisitor
<Cursor>(c0) {
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moveToLeaf
();
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}
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template
<
class
Cursor>
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forceinline
bool
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PostorderNodeVisitor<Cursor>::next
(
void
) {
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c.processCurrentNode();
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if
(c.mayMoveSidewards()) {
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c.moveSidewards();
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moveToLeaf();
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}
else
if
(c.mayMoveUpwards()) {
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c.moveUpwards();
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}
else
{
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return
false
;
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}
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return
true
;
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}
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template
<
class
Cursor>
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forceinline
void
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PostorderNodeVisitor<Cursor>::run
(
void
) {
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while
(next()) {}
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}
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template
<
class
Cursor>
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forceinline
bool
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PreorderNodeVisitor<Cursor>::backtrack
(
void
) {
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while
(! c.mayMoveSidewards() && c.mayMoveUpwards()) {
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c.moveUpwards();
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}
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if
(! c.mayMoveUpwards()) {
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return
false
;
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}
else
{
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c.moveSidewards();
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}
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return
true
;
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}
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template
<
class
Cursor>
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PreorderNodeVisitor<Cursor>::PreorderNodeVisitor
(
const
Cursor& c0)
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:
NodeVisitor
<Cursor>(c0) {}
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template
<
class
Cursor>
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forceinline
bool
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PreorderNodeVisitor<Cursor>::next
(
void
) {
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c.processCurrentNode();
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if
(c.mayMoveDownwards()) {
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c.moveDownwards();
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}
else
if
(c.mayMoveSidewards()) {
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c.moveSidewards();
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}
else
{
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return
backtrack();
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}
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return
true
;
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}
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template
<
class
Cursor>
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forceinline
void
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PreorderNodeVisitor<Cursor>::run
(
void
) {
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while
(next()) {}
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}
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}}
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// STATISTICS: gist-any
Gecode::Gist::NodeVisitor
Base class for a visitor that runs a cursor over a tree.
Definition
nodevisitor.hh:41
Gecode::Gist::NodeVisitor::getCursor
Cursor & getCursor(void)
Return the cursor.
Definition
nodevisitor.hpp:46
Gecode::Gist::NodeVisitor::NodeVisitor
NodeVisitor(const Cursor &c0)
Constructor.
Definition
nodevisitor.hpp:38
Gecode::Gist::NodeVisitor::setCursor
void setCursor(const Cursor &c0)
Reset the cursor object to c0.
Definition
nodevisitor.hpp:42
Gecode::Gist::PostorderNodeVisitor::PostorderNodeVisitor
PostorderNodeVisitor(const Cursor &c)
Constructor.
Definition
nodevisitor.hpp:57
Gecode::Gist::PostorderNodeVisitor::next
bool next(void)
Move cursor to next node, return true if succeeded.
Definition
nodevisitor.hpp:64
Gecode::Gist::PostorderNodeVisitor::run
void run(void)
Execute visitor.
Definition
nodevisitor.hpp:79
Gecode::Gist::PostorderNodeVisitor::moveToLeaf
void moveToLeaf(void)
Move the cursor to the left-most leaf.
Definition
nodevisitor.hpp:50
Gecode::Gist::PreorderNodeVisitor::next
bool next(void)
Move cursor to the next node, return true if succeeded.
Definition
nodevisitor.hpp:103
Gecode::Gist::PreorderNodeVisitor::PreorderNodeVisitor
PreorderNodeVisitor(const Cursor &c)
Constructor.
Definition
nodevisitor.hpp:98
Gecode::Gist::PreorderNodeVisitor::backtrack
bool backtrack(void)
Move cursor to next node from a leaf.
Definition
nodevisitor.hpp:85
Gecode::Gist::PreorderNodeVisitor::run
void run(void)
Execute visitor.
Definition
nodevisitor.hpp:117
Gecode
Gecode toplevel namespace
forceinline
#define forceinline
Definition
config.hpp:187