ranges-positive.hpp
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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
* Main authors:
* Christian Schulte <schulte@gecode.org>
*
* Copyright:
* Christian Schulte, 2008
*
* This file is part of Gecode, the generic constraint
* development environment:
* http://www.gecode.org
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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*/
#include <algorithm>
namespace Gecode { namespace Iter { namespace Ranges {
template<class I, bool strict=false>
class Positive {
protected:
I i;
public:
Positive(void);
Positive(I& i);
void init(I& i);
bool operator ()(void) const;
void operator ++(void);
int min(void) const;
int max(void) const;
unsigned int width(void) const;
};
template<class I, bool strict>
forceinline
Positive<I,strict>::Positive(void) {}
template<class I, bool strict>
forceinline void
Positive<I,strict>::init(I& i0) {
i=i0;
if (strict) {
while (i() && (i.max() < 0)) ++i;
} else {
while (i() && (i.max() <= 0)) ++i;
}
}
template<class I, bool strict>
forceinline
Positive<I,strict>::Positive(I& i) {
init(i);
}
template<class I, bool strict>
forceinline void
Positive<I,strict>::operator ++(void) {
++i;
}
template<class I, bool strict>
forceinline bool
Positive<I,strict>::operator ()(void) const {
return i();
}
template<class I, bool strict>
forceinline int
Positive<I,strict>::min(void) const {
if (strict) {
return std::max(i.min(),1);
} else {
return std::max(i.min(),0);
}
}
template<class I, bool strict>
forceinline int
Positive<I,strict>::max(void) const {
return i.max();
}
template<class I, bool strict>
forceinline unsigned int
Positive<I,strict>::width(void) const {
return static_cast<unsigned int>(max()-min()+1);
}
}}}
// STATISTICS: iter-any
Gecode::Iter::Ranges::Positive::min
int min(void) const
Return smallest value of range.
Definition ranges-positive.hpp:115
Gecode::Iter::Ranges::Positive::Positive
Positive(void)
Default constructor.
Definition ranges-positive.hpp:83
Gecode::Iter::Ranges::Positive::width
unsigned int width(void) const
Return width of range (distance between minimum and maximum).
Definition ranges-positive.hpp:129
Gecode::Iter::Ranges::Positive::operator++
void operator++(void)
Move iterator to next range (if possible).
Definition ranges-positive.hpp:104
Gecode::Iter::Ranges::Positive::init
void init(I &i)
Initialize with ranges from i.
Definition ranges-positive.hpp:87
Gecode::Iter::Ranges::Positive::i
I i
Input iterator.
Definition ranges-positive.hpp:49
Gecode::Iter::Ranges::Positive::max
int max(void) const
Return largest value of range.
Definition ranges-positive.hpp:124
Gecode::Iter::Ranges::Positive::operator()
bool operator()(void) const
Test whether iterator is still at a range or done.
Definition ranges-positive.hpp:109
Gecode::Iter::Ranges
Range iterators.
Definition iter.hh:43
Gecode::Iter
Range and value iterators.
Definition iter.hh:41
Gecode
Gecode toplevel namespace
Gecode::min
void min(Home home, FloatVar x0, FloatVar x1, FloatVar x2)
Post propagator for .
Definition arithmetic.cpp:67
Gecode::max
void max(Home home, FloatVar x0, FloatVar x1, FloatVar x2)
Post propagator for .
Definition arithmetic.cpp:49
forceinline
#define forceinline
Definition config.hpp:187