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/* -----------------------------------------------------------------------------
* octiterators.swg
*
* Users can derive form the OctSwigIterator to implemet their
* own iterators. As an example (real one since we use it for STL/STD
* containers), the template OctSwigIterator_T does the
* implementation for generic C++ iterators.
* ----------------------------------------------------------------------------- */
%include <std_common.i>
%fragment("OctSwigIterator","header",fragment="<stddef.h>") {
namespace swig {
struct stop_iteration {
};
struct OctSwigIterator {
private:
octave_value _seq;
protected:
OctSwigIterator(octave_value seq) : _seq(seq)
{
}
public:
virtual ~OctSwigIterator() {}
virtual octave_value value() const = 0;
virtual OctSwigIterator *incr(size_t n = 1) = 0;
virtual OctSwigIterator *decr(size_t n = 1)
{
throw stop_iteration();
}
virtual ptrdiff_t distance(const OctSwigIterator &x) const
{
throw std::invalid_argument("operation not supported");
}
virtual bool equal (const OctSwigIterator &x) const
{
throw std::invalid_argument("operation not supported");
}
virtual OctSwigIterator *copy() const = 0;
octave_value next()
{
octave_value obj = value();
incr();
return obj;
}
octave_value previous()
{
decr();
return value();
}
OctSwigIterator *advance(ptrdiff_t n)
{
return (n > 0) ? incr(n) : decr(-n);
}
bool operator == (const OctSwigIterator& x) const
{
return equal(x);
}
bool operator != (const OctSwigIterator& x) const
{
return ! operator==(x);
}
OctSwigIterator* operator ++ () {
incr();
return this;
}
OctSwigIterator* operator -- () {
decr();
return this;
}
OctSwigIterator* operator + (ptrdiff_t n) const
{
return copy()->advance(n);
}
OctSwigIterator* operator - (ptrdiff_t n) const
{
return copy()->advance(-n);
}
ptrdiff_t operator - (const OctSwigIterator& x) const
{
return x.distance(*this);
}
static swig_type_info* descriptor() {
static int init = 0;
static swig_type_info* desc = 0;
if (!init) {
desc = SWIG_TypeQuery("swig::OctSwigIterator *");
init = 1;
}
return desc;
}
};
}
}
%fragment("OctSwigIterator_T","header",fragment="<stddef.h>",fragment="OctSwigIterator",fragment="StdTraits",fragment="StdIteratorTraits") {
namespace swig {
template<typename OutIterator>
class OctSwigIterator_T : public OctSwigIterator
{
public:
typedef OutIterator out_iterator;
typedef typename std::iterator_traits<out_iterator>::value_type value_type;
typedef OctSwigIterator_T<out_iterator> self_type;
OctSwigIterator_T(out_iterator curr, octave_value seq)
: OctSwigIterator(seq), current(curr)
{
}
const out_iterator& get_current() const
{
return current;
}
bool equal (const OctSwigIterator &iter) const
{
const self_type *iters = dynamic_cast<const self_type *>(&iter);
if (iters) {
return (current == iters->get_current());
} else {
throw std::invalid_argument("bad iterator type");
}
}
ptrdiff_t distance(const OctSwigIterator &iter) const
{
const self_type *iters = dynamic_cast<const self_type *>(&iter);
if (iters) {
return std::distance(current, iters->get_current());
} else {
throw std::invalid_argument("bad iterator type");
}
}
protected:
out_iterator current;
};
template <class ValueType>
struct from_oper
{
typedef const ValueType& argument_type;
typedef octave_value result_type;
result_type operator()(argument_type v) const
{
return swig::from(v);
}
};
template<typename OutIterator,
typename ValueType = typename std::iterator_traits<OutIterator>::value_type,
typename FromOper = from_oper<ValueType> >
class OctSwigIteratorOpen_T : public OctSwigIterator_T<OutIterator>
{
public:
FromOper from;
typedef OutIterator out_iterator;
typedef ValueType value_type;
typedef OctSwigIterator_T<out_iterator> base;
typedef OctSwigIteratorOpen_T<OutIterator, ValueType, FromOper> self_type;
OctSwigIteratorOpen_T(out_iterator curr, octave_value seq)
: OctSwigIterator_T<OutIterator>(curr, seq)
{
}
octave_value value() const {
return from(static_cast<const value_type&>(*(base::current)));
}
OctSwigIterator *copy() const
{
return new self_type(*this);
}
OctSwigIterator *incr(size_t n = 1)
{
while (n--) {
++base::current;
}
return this;
}
OctSwigIterator *decr(size_t n = 1)
{
while (n--) {
--base::current;
}
return this;
}
};
template<typename OutIterator,
typename ValueType = typename std::iterator_traits<OutIterator>::value_type,
typename FromOper = from_oper<ValueType> >
class OctSwigIteratorClosed_T : public OctSwigIterator_T<OutIterator>
{
public:
FromOper from;
typedef OutIterator out_iterator;
typedef ValueType value_type;
typedef OctSwigIterator_T<out_iterator> base;
typedef OctSwigIteratorClosed_T<OutIterator, ValueType, FromOper> self_type;
OctSwigIteratorClosed_T(out_iterator curr, out_iterator first, out_iterator last, octave_value seq)
: OctSwigIterator_T<OutIterator>(curr, seq), begin(first), end(last)
{
}
octave_value value() const {
if (base::current == end) {
throw stop_iteration();
} else {
return from(static_cast<const value_type&>(*(base::current)));
}
}
OctSwigIterator *copy() const
{
return new self_type(*this);
}
OctSwigIterator *incr(size_t n = 1)
{
while (n--) {
if (base::current == end) {
throw stop_iteration();
} else {
++base::current;
}
}
return this;
}
OctSwigIterator *decr(size_t n = 1)
{
while (n--) {
if (base::current == begin) {
throw stop_iteration();
} else {
--base::current;
}
}
return this;
}
private:
out_iterator begin;
out_iterator end;
};
template<typename OutIter>
inline OctSwigIterator*
make_output_iterator(const OutIter& current, const OutIter& begin,const OutIter& end, octave_value seq = octave_value())
{
return new OctSwigIteratorClosed_T<OutIter>(current, begin, end, seq);
}
template<typename OutIter>
inline OctSwigIterator*
make_output_iterator(const OutIter& current, octave_value seq = octave_value())
{
return new OctSwigIteratorOpen_T<OutIter>(current, seq);
}
}
}
%fragment("OctSwigIterator");
namespace swig
{
// Throw a StopIteration exception
%ignore stop_iteration;
struct stop_iteration {};
%typemap(throws) stop_iteration {
error("stop_iteration exception");
SWIG_fail;
}
// Mark methods that return new objects
%newobject OctSwigIterator::copy;
%newobject OctSwigIterator::operator + (ptrdiff_t n) const;
%newobject OctSwigIterator::operator - (ptrdiff_t n) const;
%nodirector OctSwigIterator;
%catches(swig::stop_iteration) OctSwigIterator::value() const;
%catches(swig::stop_iteration) OctSwigIterator::incr(size_t n = 1);
%catches(swig::stop_iteration) OctSwigIterator::decr(size_t n = 1);
%catches(std::invalid_argument) OctSwigIterator::distance(const OctSwigIterator &x) const;
%catches(std::invalid_argument) OctSwigIterator::equal (const OctSwigIterator &x) const;
%catches(swig::stop_iteration) OctSwigIterator::next();
%catches(swig::stop_iteration) OctSwigIterator::previous();
%catches(swig::stop_iteration) OctSwigIterator::advance(ptrdiff_t n);
%catches(swig::stop_iteration) OctSwigIterator::operator += (ptrdiff_t n);
%catches(swig::stop_iteration) OctSwigIterator::operator -= (ptrdiff_t n);
%catches(swig::stop_iteration) OctSwigIterator::operator + (ptrdiff_t n) const;
%catches(swig::stop_iteration) OctSwigIterator::operator - (ptrdiff_t n) const;
struct OctSwigIterator
{
protected:
OctSwigIterator(octave_value seq);
public:
virtual ~OctSwigIterator();
virtual octave_value value() const = 0;
virtual OctSwigIterator *incr(size_t n = 1) = 0;
virtual OctSwigIterator *decr(size_t n = 1);
virtual ptrdiff_t distance(const OctSwigIterator &x) const;
virtual bool equal (const OctSwigIterator &x) const;
virtual OctSwigIterator *copy() const = 0;
octave_value next();
octave_value previous();
OctSwigIterator *advance(ptrdiff_t n);
bool operator == (const OctSwigIterator& x) const;
bool operator != (const OctSwigIterator& x) const;
OctSwigIterator* operator ++ ();
OctSwigIterator* operator -- ();
OctSwigIterator* operator + (ptrdiff_t n) const;
OctSwigIterator* operator - (ptrdiff_t n) const;
ptrdiff_t operator - (const OctSwigIterator& x) const;
};
}
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