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dust3d/thirdparty/cgal/CGAL-4.13/include/CGAL/Lazy.h

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// Copyright (c) 2005,2006 INRIA Sophia-Antipolis (France).
// All rights reserved.
//
// This file is part of CGAL (www.cgal.org); you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 3 of the License,
// or (at your option) any later version.
//
// Licensees holding a valid commercial license may use this file in
// accordance with the commercial license agreement provided with the software.
//
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
//
// $URL$
// $Id$
// SPDX-License-Identifier: LGPL-3.0+
//
//
// Author(s) : Andreas Fabri, Sylvain Pion
#ifndef CGAL_LAZY_H
#define CGAL_LAZY_H
#include <CGAL/disable_warnings.h>
#include <CGAL/basic.h>
#include <CGAL/Handle.h>
#include <CGAL/Object.h>
#include <CGAL/Kernel/Type_mapper.h>
#include <CGAL/Profile_counter.h>
#include <CGAL/Kernel/Return_base_tag.h>
#include <CGAL/min_max_n.h>
#include <CGAL/Origin.h>
#include <CGAL/Bbox_2.h>
#include <CGAL/Bbox_3.h>
#include <vector>
#include <CGAL/Default.h>
#include<CGAL/tss.h>
#include <boost/optional.hpp>
#include <boost/variant.hpp>
#ifdef CGAL_LAZY_KERNEL_DEBUG
# include <boost/optional/optional_io.hpp>
#endif
#include <boost/mpl/has_xxx.hpp>
#include <boost/preprocessor/facilities/expand.hpp>
#include <boost/preprocessor/repetition/repeat_from_to.hpp>
#include <boost/preprocessor/repetition/repeat.hpp>
#include <boost/preprocessor/repetition/enum_params.hpp>
#include <boost/preprocessor/repetition/enum_binary_params.hpp>
#include <boost/preprocessor/repetition/enum.hpp>
namespace CGAL {
template <class E,
class A,
class E2A,
class K>
class Lazy_kernel_base;
template <typename AT, typename ET, typename EFT, typename E2A> class Lazy;
template <typename ET_>
class Lazy_exact_nt;
template <typename AT, typename ET, typename EFT, typename E2A>
inline
const AT&
approx(const Lazy<AT,ET, EFT, E2A>& l)
{
return l.approx();
}
// Where is this one (non-const) needed ? Is it ?
template <typename AT, typename ET, typename EFT, typename E2A>
inline
AT&
approx(Lazy<AT,ET, EFT, E2A>& l)
{
return l.approx();
}
template <typename AT, typename ET, typename EFT, typename E2A>
inline
const ET&
exact(const Lazy<AT,ET,EFT,E2A>& l)
{
return l.exact();
}
template <typename AT, typename ET, typename EFT, typename E2A>
inline
unsigned
depth(const Lazy<AT,ET,EFT,E2A>& l)
{
return l.depth();
}
#define CGAL_LAZY_FORWARD(T) \
inline const T & approx(const T& d) { return d; } \
inline const T & exact (const T& d) { return d; } \
inline unsigned depth (const T& ) { return 0; }
CGAL_LAZY_FORWARD(long double)
CGAL_LAZY_FORWARD(double)
CGAL_LAZY_FORWARD(float)
CGAL_LAZY_FORWARD(int)
CGAL_LAZY_FORWARD(unsigned int)
CGAL_LAZY_FORWARD(long)
CGAL_LAZY_FORWARD(unsigned long)
#ifdef CGAL_USE_LONG_LONG
CGAL_LAZY_FORWARD(long long)
CGAL_LAZY_FORWARD(unsigned long long)
#endif
CGAL_LAZY_FORWARD(Return_base_tag)
CGAL_LAZY_FORWARD(Null_vector)
CGAL_LAZY_FORWARD(Origin)
CGAL_LAZY_FORWARD(Orientation)
CGAL_LAZY_FORWARD(Bbox_2)
CGAL_LAZY_FORWARD(Bbox_3)
#undef CGAL_LAZY_FORWARD
#ifdef CGAL_LAZY_KERNEL_DEBUG
template <class T>
void
print_at(std::ostream& os, const T& at)
{
os << at;
}
template <class T>
void
print_at(std::ostream& os, const std::vector<T>& at)
{
os << "std::vector";
}
template <>
void
print_at(std::ostream& os, const Object& o)
{
os << "Object";
}
template <class T1, class T2>
void
print_at(std::ostream& os, const std::pair<T1,T2> & at)
{
os << "[ " << at.first << " | " << at.second << " ]" << std::endl ;
}
template <typename AT, typename ET, typename EFT, typename E2A>
inline
void
print_dag(const Lazy<AT,ET,EFT,E2A>& l, std::ostream& os, int level = 0)
{
l.print_dag(os, level);
}
inline
void
print_dag(double d, std::ostream& os, int level)
{
for(int i = 0; i < level; i++)
os << " ";
os << d << std::endl;
}
inline
void
msg(std::ostream& os, int level, const char* s)
{
for(int i = 0; i < level; i++)
os << " ";
os << s << std::endl;
}
inline
void
print_dag(const Null_vector&, std::ostream& os, int level)
{
for(int i = 0; i < level; i++)
os << " ";
os << "Null_vector" << std::endl;
}
inline
void
print_dag(const Origin&, std::ostream& os, int level)
{
for(int i = 0; i < level; i++)
os << " ";
os << "Origin" << std::endl;
}
inline
void
print_dag(const Return_base_tag&, std::ostream& os, int level)
{
for(int i = 0; i < level; i++)
os << " ";
os << "Return_base_tag" << std::endl;
}
#endif
struct Depth_base {
#ifdef CGAL_PROFILE
unsigned depth_;
Depth_base() { set_depth(0); }
unsigned depth() const { return depth_; }
void set_depth(unsigned i)
{
depth_ = i;
CGAL_HISTOGRAM_PROFILER(std::string("[Lazy_kernel DAG depths]"), i);
//(unsigned) ::log2(double(i)));
}
#else
unsigned depth() const { return 0; }
void set_depth(unsigned) {}
#endif
};
// Abstract base class for lazy numbers and lazy objects
template <typename AT_, typename ET, typename E2A>
class Lazy_rep : public Rep, public Depth_base
{
Lazy_rep (const Lazy_rep&); // cannot be copied.
public:
typedef AT_ AT;
mutable AT at;
mutable ET *et;
Lazy_rep ()
: at(), et(NULL){}
Lazy_rep (const AT& a)
: at(a), et(NULL){}
Lazy_rep (const AT& a, const ET& e)
: at(a), et(new ET(e)) {}
const AT& approx() const
{
return at;
}
AT& approx()
{
return at;
}
const ET & exact() const
{
if (et==NULL)
update_exact();
return *et;
}
ET & exact()
{
if (et==NULL)
update_exact();
return *et;
}
#ifdef CGAL_LAZY_KERNEL_DEBUG
void print_at_et(std::ostream& os, int level) const
{
for(int i = 0; i < level; i++){
os << " ";
}
os << "Approximation: ";
print_at(os, at);
os << std::endl;
if(! is_lazy()){
for(int i = 0; i < level; i++){
os << " ";
}
os << "Exact: ";
print_at(os, *et);
os << std::endl;
#ifdef CGAL_LAZY_KERNEL_DEBUG_SHOW_TYPEID
for(int i = 0; i < level; i++){
os << " ";
}
os << " (type: " << typeid(*et).name() << ")" << std::endl;
#endif // CGAL_LAZY_KERNEL_DEBUG_SHOW_TYPEID
}
}
virtual void print_dag(std::ostream& os, int level) const {}
#endif
bool is_lazy() const { return et == NULL; }
virtual void update_exact() const = 0;
virtual ~Lazy_rep() { delete et; }
};
//____________________________________________________________
// The rep for the leaf node
template <typename AT, typename ET, typename E2A>
class Lazy_rep_0 : public Lazy_rep<AT, ET, E2A>
{
typedef Lazy_rep<AT, ET, E2A> Base;
public:
void
update_exact() const
{
this->et = new ET();
}
Lazy_rep_0()
: Lazy_rep<AT,ET, E2A>() {}
Lazy_rep_0(const AT& a, const ET& e)
: Lazy_rep<AT,ET,E2A>(a, e) {}
Lazy_rep_0(const AT& a, void*)
: Lazy_rep<AT,ET,E2A>(a) {}
Lazy_rep_0(const ET& e)
: Lazy_rep<AT,ET,E2A>(E2A()(e), e) {}
void
print_dag(std::ostream& os, int level) const
{
this->print_at_et(os, level);
}
};
// Macro helpers to build the kernel objects
#define CGAL_TYPEMAP_AC(z, n, t) typedef typename Type_mapper< t##n, LK, AK >::type A##n;
#define CGAL_TYPEMAP_EC(z, n, t) typedef typename Type_mapper< t##n, LK, EK >::type E##n;
#define CGAL_LEXACT(z,n,t) CGAL::exact( l##n )
#define CGAL_LARGS(z, n, t) L##n const& l##n
#define CGAL_TMAP(z, n, d) typename Type_mapper< L##n, d##K, LK >::type
#define CGAL_PRUNE_TREE(z, n, d) l##n = L##n ();
#define CGAL_LINIT(z, n, d) l##n(l##n)
#define CGAL_LN(z, n, d) d(l##n)
#define CGAL_MLIST(z, n, d) mutable L##n l##n;
//____________________________________________________________
template <typename AT, typename ET, typename AC, typename EC, typename E2A, typename L1>
class Lazy_rep_1
: public Lazy_rep<AT, ET, E2A>
, private EC
{
typedef Lazy_rep<AT, ET, E2A> Base;
mutable L1 l1_;
const EC& ec() const { return *this; }
public:
void
update_exact() const
{
this->et = new ET(ec()(CGAL::exact(l1_)));
this->at = E2A()(*(this->et));
// Prune lazy tree
l1_ = L1();
}
Lazy_rep_1(const AC& ac, const EC& ec, const L1& l1)
: Lazy_rep<AT,ET, E2A>(ac(CGAL::approx(l1))), EC(ec), l1_(l1)
{
this->set_depth(CGAL::depth(l1_) + 1);
}
#ifdef CGAL_LAZY_KERNEL_DEBUG_SHOW_TYPEID
# define CGAL_LAZY_PRINT_TYPEID CGAL::msg(os, level, typeid(AC).name());
#else // not CGAL_LAZY_KERNEL_DEBUG_SHOW_TYPEID
# define CGAL_LAZY_PRINT_TYPEID
#endif // not CGAL_LAZY_KERNEL_DEBUG_SHOW_TYPEID
#ifdef CGAL_LAZY_KERNEL_DEBUG
void
print_dag(std::ostream& os, int level) const
{
this->print_at_et(os, level);
if(this->is_lazy()){
CGAL_LAZY_PRINT_TYPEID
CGAL::msg(os, level, "DAG with one child node:");
CGAL::print_dag(l1_, os, level+1);
}
}
#endif
};
#ifdef CGAL_LAZY_KERNEL_DEBUG
# define CGAL_PRINT_DAG_LN(z, n, d) \
CGAL::print_dag(l##n, os, level+1);
# define CGAL_LAZY_REP_PRINT_DAG(n) \
void print_dag(std::ostream& os, int level) const { \
this->print_at_et(os, level); \
if(this->is_lazy()){ \
CGAL_LAZY_PRINT_TYPEID \
CGAL::msg(os, level, "DAG with " #n " child nodes:"); \
BOOST_PP_REPEAT(n, CGAL_PRINT_DAG_LN, _) \
} \
}
#else // not CGAL_LAZY_KERNEL_DEBUG
# define CGAL_LAZY_REP_PRINT_DAG(n)
#endif // not CGAL_LAZY_KERNEL_DEBUG
#define CGAL_LAZY_REP(z, n, d) \
template< typename AT, typename ET, typename AC, typename EC, typename E2A, BOOST_PP_ENUM_PARAMS(n, typename L)> \
class Lazy_rep_##n :public Lazy_rep< AT, \
ET, \
E2A >, \
private EC \
{ \
\
template <class Ei, \
class Ai, \
class E2Ai,\
class Ki> \
friend class Lazy_kernel_base; \
BOOST_PP_REPEAT(n, CGAL_MLIST, _) \
const EC& ec() const { return *this; } \
public: \
void update_exact() const { \
this->et = new ET(ec()( BOOST_PP_ENUM(n, CGAL_LEXACT, _) ) ); \
this->at = E2A()(*(this->et)); \
BOOST_PP_REPEAT(n, CGAL_PRUNE_TREE, _) \
} \
Lazy_rep_##n(const AC& ac, const EC&, BOOST_PP_ENUM(n, CGAL_LARGS, _)) \
: Lazy_rep<AT, ET, E2A>(ac( BOOST_PP_ENUM(n, CGAL_LN, CGAL::approx) )), BOOST_PP_ENUM(n, CGAL_LINIT, _) \
{ this->set_depth(max_n( BOOST_PP_ENUM(n, CGAL_LN, CGAL::depth) ) + 1); } \
\
CGAL_LAZY_REP_PRINT_DAG(n) \
};
BOOST_PP_REPEAT_FROM_TO(2, 9, CGAL_LAZY_REP, _)
#undef CGAL_TMAP
#undef CGAL_PRUNE_TREE
#undef CGAL_LINIT
#undef CGAL_LAZY_REP
#undef CGAL_LN
#undef CGAL_MLIST
#undef CGAL_PRINT_DAG_LN
#undef CGAL_LAZY_REP_PRINT_DAG
#undef CGAL_LAZY_PRINT_TYPEID
template < typename K1, typename K2 >
struct Approx_converter
{
typedef K1 Source_kernel;
typedef K2 Target_kernel;
//typedef Converter Number_type_converter;
template < typename T >
const typename T::AT&
operator()(const T&t) const
{ return t.approx(); }
const Null_vector&
operator()(const Null_vector& n) const
{ return n; }
const Bbox_2&
operator()(const Bbox_2& b) const
{ return b; }
const Bbox_3&
operator()(const Bbox_3& b) const
{ return b; }
};
template < typename K1, typename K2 >
struct Exact_converter
{
typedef K1 Source_kernel;
typedef K2 Target_kernel;
//typedef Converter Number_type_converter;
template < typename T >
const typename T::ET&
operator()(const T&t) const
{ return t.exact(); }
const Null_vector&
operator()(const Null_vector& n) const
{ return n; }
const Bbox_2&
operator()(const Bbox_2& b) const
{ return b; }
const Bbox_3&
operator()(const Bbox_3& b) const
{ return b; }
};
//____________________________________________________________
template <typename AC, typename EC, typename E2A, typename L1>
class Lazy_rep_with_vector_1
: public Lazy_rep<std::vector<Object>, std::vector<Object>, E2A>
, private EC
{
typedef std::vector<Object> AT;
typedef std::vector<Object> ET;
typedef Lazy_rep<AT, ET, E2A> Base;
mutable L1 l1_;
const EC& ec() const { return *this; }
public:
void
update_exact() const
{
// TODO : This looks really unfinished...
std::vector<Object> vec;
this->et = new ET();
//this->et->reserve(this->at.size());
ec()(CGAL::exact(l1_), std::back_inserter(*(this->et)));
if(this->et==NULL)
E2A()(*(this->et));
this->at = E2A()(*(this->et));
// Prune lazy tree
l1_ = L1();
}
Lazy_rep_with_vector_1(const AC& ac, const EC& /*ec*/, const L1& l1)
: l1_(l1)
{
ac(CGAL::approx(l1), std::back_inserter(this->at));
}
#ifdef CGAL_LAZY_KERNEL_DEBUG
void
print_dag(std::ostream& os, int level) const
{
this->print_at_et(os, level);
os << "A Lazy_rep_with_vector_1 of size " << this->at.size() << std::endl;
if(this->is_lazy()){
CGAL::msg(os, level, "DAG with one child node:");
CGAL::print_dag(l1_, os, level+1);
}
}
#endif
};
template <typename AC, typename EC, typename E2A, typename L1, typename L2>
class Lazy_rep_with_vector_2
: public Lazy_rep<std::vector<Object>, std::vector<Object>, E2A>
, private EC
{
typedef std::vector<Object> AT;
typedef std::vector<Object> ET;
typedef Lazy_rep<AT, ET, E2A> Base;
mutable L1 l1_;
mutable L2 l2_;
const EC& ec() const { return *this; }
public:
void
update_exact() const
{
this->et = new ET();
this->et->reserve(this->at.size());
ec()(CGAL::exact(l1_), CGAL::exact(l2_), std::back_inserter(*(this->et)));
this->at = E2A()(*(this->et));
// Prune lazy tree
l1_ = L1();
l2_ = L2();
}
Lazy_rep_with_vector_2(const AC& ac, const EC& /*ec*/, const L1& l1, const L2& l2)
: l1_(l1), l2_(l2)
{
ac(CGAL::approx(l1), CGAL::approx(l2), std::back_inserter(this->at));
}
#ifdef CGAL_LAZY_KERNEL_DEBUG
void
print_dag(std::ostream& os, int level) const
{
this->print_at_et(os, level);
os << "A Lazy_rep_with_vector_2 of size " << this->at.size() << std::endl;
if(this->is_lazy()){
CGAL::msg(os, level, "DAG with two child nodes:");
CGAL::print_dag(l1_, os, level+1);
CGAL::print_dag(l2_, os, level+1);
}
}
#endif
};
template <typename AC, typename EC, typename E2A, typename L1, typename L2, typename R1>
class Lazy_rep_2_1
: public Lazy_rep<typename R1::AT, typename R1::ET, E2A>
, private EC
{
typedef typename R1::AT AT;
typedef typename R1::ET ET;
typedef Lazy_rep<AT, ET, E2A> Base;
mutable L1 l1_;
mutable L2 l2_;
const EC& ec() const { return *this; }
public:
void
update_exact() const
{
this->et = new ET();
ec()(CGAL::exact(l1_), CGAL::exact(l2_), *(this->et));
this->at = E2A()(*(this->et));
// Prune lazy tree
l1_ = L1();
l2_ = L2();
}
Lazy_rep_2_1(const AC& ac, const EC& /*ec*/, const L1& l1, const L2& l2)
: Lazy_rep<AT,ET,E2A>(), l1_(l1), l2_(l2)
{
ac(CGAL::approx(l1), CGAL::approx(l2), this->at);
}
#ifdef CGAL_LAZY_KERNEL_DEBUG
void
print_dag(std::ostream& os, int level) const
{
this->print_at_et(os, level);
os << "A Lazy_rep_2_1" << std::endl;
if(this->is_lazy()){
CGAL::msg(os, level, "DAG with two child nodes:");
CGAL::print_dag(l1_, os, level+1);
CGAL::print_dag(l2_, os, level+1);
}
}
#endif
};
//____________________________________________________________________________________
// The following rep class stores two non-const reference parameters of type R1 and R2
template <typename AC, typename EC, typename E2A, typename L1, typename L2, typename R1, typename R2>
class Lazy_rep_2_2
: public Lazy_rep<std::pair<typename R1::AT,typename R2::AT>, std::pair<typename R1::ET, typename R2::ET>, E2A>
, private EC
{
typedef std::pair<typename R1::AT, typename R2::AT> AT;
typedef std::pair<typename R1::ET, typename R2::ET> ET;
typedef Lazy_rep<AT, ET, E2A> Base;
mutable L1 l1_;
mutable L2 l2_;
const EC& ec() const { return *this; }
public:
void
update_exact() const
{
this->et = new ET();
ec()(CGAL::exact(l1_), CGAL::exact(l2_), this->et->first, this->et->second );
this->at = E2A()(*(this->et));
// Prune lazy tree
l1_ = L1();
l2_ = L2();
}
Lazy_rep_2_2(const AC& ac, const EC& /*ec*/, const L1& l1, const L2& l2)
: Lazy_rep<AT,ET,E2A>(), l1_(l1), l2_(l2)
{
ac(CGAL::approx(l1), CGAL::approx(l2), this->at.first, this->at.second);
}
#ifdef CGAL_LAZY_KERNEL_DEBUG
void
print_dag(std::ostream& os, int level) const
{
this->print_at_et(os, level);
os << "A Lazy_rep_2_2" << std::endl;
if(this->is_lazy()){
CGAL::msg(os, level, "DAG with two child nodes:");
CGAL::print_dag(l1_, os, level+1);
CGAL::print_dag(l2_, os, level+1);
}
}
#endif
};
//____________________________________________________________
// The handle class
template <typename AT_, typename ET_, typename EFT, typename E2A>
class Lazy : public Handle
{
template <class Exact_kernel_,
class Approximate_kernel_,
class E2A_>
friend struct Lazy_kernel;
template <class E_,
class A_,
class E2A_,
class K_>
friend class Lazy_kernel_base;
public :
typedef Lazy<AT_, ET_, EFT, E2A> Self;
typedef Lazy_rep<AT_, ET_, E2A> Self_rep;
typedef AT_ AT; // undocumented
typedef ET_ ET; // undocumented
typedef AT Approximate_type;
typedef ET Exact_type;
/*
typedef Self Rep;
const Rep& rep() const
{
return *this;
}
Rep& rep()
{
return *this;
}
*/
Lazy()
: Handle(zero()) {}
// Before Lazy::zero() used Boost.Thread, the definition of Lazy() was:
// Lazy()
// #ifndef CGAL_HAS_THREAD
// : Handle(zero()) {}
// #else
// {
// PTR = new Lazy_rep_0<AT, ET, E2A>();
// }
// #endif
Lazy(Self_rep *r)
{
PTR = r;
}
Lazy(const ET& e)
{
PTR = new Lazy_rep_0<AT,ET,E2A>(e);
}
const AT& approx() const
{ return ptr()->approx(); }
const ET& exact() const
{ return ptr()->exact(); }
AT& approx()
{ return ptr()->approx(); }
ET& exact()
{ return ptr()->exact(); }
unsigned depth() const
{
return ptr()->depth();
}
void print_dag(std::ostream& os, int level) const
{
ptr()->print_dag(os, level);
}
private:
// We have a static variable for optimizing the default constructor,
// which is in particular heavily used for pruning DAGs.
static const Self & zero()
{
// Note that the new only happens inside an if() inside the macro
// So it would be a mistake to put the new before the macro
CGAL_STATIC_THREAD_LOCAL_VARIABLE(Self,z,(new Lazy_rep_0<AT, ET, E2A>()));
return z;
}
Self_rep * ptr() const { return (Self_rep*) PTR; }
};
// The magic functor for Construct_bbox_[2,3], as there is no Lazy<Bbox>
template <typename LK, typename AC, typename EC>
struct Lazy_construction_bbox
{
static const bool Protection = true;
typedef typename LK::Approximate_kernel AK;
typedef typename LK::Exact_kernel EK;
typedef typename AC::result_type result_type;
AC ac;
EC ec;
template <typename L1>
result_type operator()(const L1& l1) const
{
CGAL_BRANCH_PROFILER(std::string(" failures/calls to : ") + std::string(CGAL_PRETTY_FUNCTION), tmp);
// Protection is outside the try block as VC8 has the CGAL_CFG_FPU_ROUNDING_MODE_UNWINDING_VC_BUG
Protect_FPU_rounding<Protection> P;
try {
return ac(CGAL::approx(l1));
} catch (Uncertain_conversion_exception&) {
CGAL_BRANCH_PROFILER_BRANCH(tmp);
Protect_FPU_rounding<!Protection> P2(CGAL_FE_TONEAREST);
return ec(CGAL::exact(l1));
}
}
};
template <typename LK, typename AC, typename EC>
struct Lazy_construction_nt {
static const bool Protection = true;
typedef typename LK::Approximate_kernel AK;
typedef typename LK::Exact_kernel EK;
typedef typename LK::E2A E2A;
AC ac;
EC ec;
template<typename>
struct result { };
#define CGAL_RESULT_NT(z, n, d) \
template< typename F, BOOST_PP_ENUM_PARAMS(n, class T) > \
struct result<F( BOOST_PP_ENUM_PARAMS(n, T) )> { \
BOOST_PP_REPEAT(n, CGAL_TYPEMAP_EC, T) \
typedef Lazy_exact_nt< \
typename boost::remove_cv< typename boost::remove_reference < \
typename cpp11::result_of<EC( BOOST_PP_ENUM_PARAMS(n, E) )>::type >::type >::type > type; \
};
BOOST_PP_REPEAT_FROM_TO(1, 6, CGAL_RESULT_NT, _)
#define CGAL_NT_OPERATOR(z, n, d) \
template<BOOST_PP_ENUM_PARAMS(n, class L)> \
typename cpp11::result_of<Lazy_construction_nt(BOOST_PP_ENUM_PARAMS(n, L))>::type \
operator()( BOOST_PP_ENUM(n, CGAL_LARGS, _) ) const { \
BOOST_PP_REPEAT(n, CGAL_TYPEMAP_EC, L) \
BOOST_PP_REPEAT(n, CGAL_TYPEMAP_AC, L) \
typedef typename boost::remove_cv< typename boost::remove_reference < \
typename cpp11::result_of< EC(BOOST_PP_ENUM_PARAMS(n, E)) >::type >::type >::type ET; \
typedef typename boost::remove_cv< typename boost::remove_reference < \
typename cpp11::result_of< AC(BOOST_PP_ENUM_PARAMS(n, A)) >::type >::type >::type AT; \
CGAL_BRANCH_PROFILER(std::string(" failures/calls to : ") + std::string(CGAL_PRETTY_FUNCTION), tmp); \
Protect_FPU_rounding<Protection> P; \
try { \
return new Lazy_rep_##n<AT, ET, AC, EC, To_interval<ET>, BOOST_PP_ENUM_PARAMS(n, L) >(ac, ec, BOOST_PP_ENUM_PARAMS(n, l)); \
} catch (Uncertain_conversion_exception&) { \
CGAL_BRANCH_PROFILER_BRANCH(tmp); \
Protect_FPU_rounding<!Protection> P2(CGAL_FE_TONEAREST); \
return new Lazy_rep_0<AT,ET,To_interval<ET> >(ec( BOOST_PP_ENUM(n, CGAL_LEXACT, _) )); \
} \
} \
BOOST_PP_REPEAT_FROM_TO(1, 6, CGAL_NT_OPERATOR, _)
#undef INTERVAL_OPERATOR
#undef CGAL_RESULT_NT
};
template <typename LK>
Object
make_lazy(const Object& eto)
{
typedef typename LK::Approximate_kernel AK;
typedef typename LK::Exact_kernel EK;
typedef typename LK::E2A E2A;
if (eto.is_empty())
return Object();
#define CGAL_Kernel_obj(X) \
if (const typename EK::X* ptr = object_cast<typename EK::X>(&eto)) \
return make_object(typename LK::X(new Lazy_rep_0<typename AK::X, typename EK::X, E2A>(*ptr)));
#include <CGAL/Kernel/interface_macros.h>
//now handle vector
#define CGAL_Kernel_obj(X) \
{ \
const std::vector<typename EK::X>* v_ptr;\
if ( (v_ptr = object_cast<std::vector<typename EK::X> >(&eto)) ) { \
std::vector<typename LK::X> V;\
V.resize(v_ptr->size()); \
for (unsigned int i = 0; i < v_ptr->size(); ++i) \
V[i] = typename LK::X( new Lazy_rep_0<typename AK::X,typename EK::X,E2A>((*v_ptr)[i])); \
return make_object(V); \
}\
}
CGAL_Kernel_obj(Point_2)
CGAL_Kernel_obj(Point_3)
#undef CGAL_Kernel_obj
std::cerr << "object_cast inside Lazy_construction_rep::operator() failed. It needs more else if's (#2)" << std::endl;
std::cerr << "dynamic type of the Object : " << eto.type().name() << std::endl;
return Object();
}
// This functor selects the i'th element in a vector of Object's
// and casts it to what is in the Object
template <typename T2>
struct Ith {
typedef T2 result_type;
// We keep a Sign member object
// for future utilisation, in case
// we have pairs of 2 T2 objects e.g.
// for a numeric_point vector returned
// from a construction of a possible
// lazy algebraic kernel
int i;
Sign sgn;
Ith(int i_)
: i(i_)
{sgn=NEGATIVE;}
Ith(int i_, bool b_)
: i(i_)
{ sgn= (b_) ? POSITIVE : ZERO;}
const T2&
operator()(const std::vector<Object>& v) const
{
if(sgn==NEGATIVE)
return *object_cast<T2>(&v[i]);
typedef std::pair<T2,unsigned int > Pair_type_1;
typedef std::pair<T2,std::pair<bool,bool> > Pair_type_2;
if(const Pair_type_1 *p1 = object_cast<Pair_type_1>(&v[i]))
return p1->first;
else if(const Pair_type_2 *p2 = object_cast<Pair_type_2>(&v[i]))
return p2->first;
CGAL_error_msg( " Unexpected encapsulated type ");
}
};
// This functor selects the i'th element in a vector of T2's
template <typename T2>
struct Ith_for_intersection {
typedef T2 result_type;
int i;
Ith_for_intersection(int i_)
: i(i_)
{}
const T2&
operator()(const Object& o) const
{
const std::vector<T2>* ptr = object_cast<std::vector<T2> >(&o);
return (*ptr)[i];
}
};
// This functor selects the i'th element in a vector of T2's
template <typename T2>
struct Ith_for_intersection_with_variant {
typedef T2 result_type;
int i;
Ith_for_intersection_with_variant(int i_)
: i(i_)
{}
template< BOOST_VARIANT_ENUM_PARAMS(typename U) >
const T2&
operator()(const boost::optional< boost::variant< BOOST_VARIANT_ENUM_PARAMS(U) > >& o) const
{
const std::vector<T2>* ptr = (boost::get<std::vector<T2> >(&(*o)));
return (*ptr)[i];
}
template< BOOST_VARIANT_ENUM_PARAMS(typename U) >
const T2&
operator()(const boost::variant< BOOST_VARIANT_ENUM_PARAMS(U) >& o) const
{
const std::vector<T2>* ptr = (boost::get<std::vector<T2> >(&o));
return (*ptr)[i];
}
};
template <typename LK, typename AC, typename EC>
struct Lazy_cartesian_const_iterator_2
{
typedef typename LK::Approximate_kernel AK;
typedef typename LK::Exact_kernel EK;
typedef typename LK::Cartesian_const_iterator_2 result_type;
AC ac;
EC ec;
public:
template < typename L1>
result_type
operator()(const L1& l1) const
{
return result_type(&l1);
}
template < typename L1>
result_type
operator()(const L1& l1, int) const
{
return result_type(&l1,2);
}
};
template <typename LK, typename AC, typename EC>
struct Lazy_cartesian_const_iterator_3
{
typedef typename LK::Approximate_kernel AK;
typedef typename LK::Exact_kernel EK;
typedef typename LK::Cartesian_const_iterator_3 result_type;
AC ac;
EC ec;
public:
template < typename L1>
result_type
operator()(const L1& l1) const
{
return result_type(&l1);
}
template < typename L1>
result_type
operator()(const L1& l1, int) const
{
return result_type(&l1,3);
}
};
// This is the magic functor for functors that write their result in a reference argument
// In a first version we assume that the references are of type Lazy<Something>,
// and that the result type is void
template <typename LK, typename AK, typename EK, typename AC, typename EC, typename EFT, typename E2A>
struct Lazy_functor_2_1
{
static const bool Protection = true;
typedef void result_type;
AC ac;
EC ec;
public:
template <typename L1, typename L2, typename R1>
void
operator()(const L1& l1, const L2& l2, R1& r1) const
{
CGAL_BRANCH_PROFILER(std::string(" failures/calls to : ") + std::string(CGAL_PRETTY_FUNCTION), tmp);
Protect_FPU_rounding<Protection> P;
try {
// we suppose that R1 is a Lazy<Something>
r1 = R1(new Lazy_rep_2_1<AC, EC, E2A, L1, L2, R1>(ac, ec, l1, l2));
} catch (Uncertain_conversion_exception&) {
CGAL_BRANCH_PROFILER_BRANCH(tmp);
Protect_FPU_rounding<!Protection> P2(CGAL_FE_TONEAREST);
typename R1::ET et;
ec(CGAL::exact(l1), CGAL::exact(l2), et);
r1 = R1(new Lazy_rep_0<typename R1::AT,typename R1::ET,E2A>(et));
}
}
};
template <typename T>
struct First
{
typedef typename T::first_type result_type;
const typename T::first_type&
operator()(const T& p) const
{
return p.first;
}
};
template <typename T>
struct Second
{
typedef typename T::second_type result_type;
const typename T::second_type&
operator()(const T& p) const
{
return p.second;
}
};
// This is the magic functor for functors that write their result in a reference argument
// In a first version we assume that the references are of type Lazy<Something>,
// and that the result type is void
//template <typename LK, typename AK, typename EK, typename AC, typename EC, typename EFT, typename E2A>
template <typename LK, typename AC, typename EC>
struct Lazy_functor_2_2
{
static const bool Protection = true;
typedef void result_type;
typedef typename LK::Approximate_kernel AK;
typedef typename LK::Exact_kernel EK;
typedef typename EK::FT EFT;
typedef typename LK::E2A E2A;
AC ac;
EC ec;
public:
template <typename L1, typename L2, typename R1, typename R2>
void
operator()(const L1& l1, const L2& l2, R1& r1, R2& r2) const
{
typedef Lazy<typename R1::AT, typename R1::ET, EFT, E2A> Handle_1;
typedef Lazy<typename R2::AT, typename R2::ET, EFT, E2A> Handle_2;
CGAL_BRANCH_PROFILER(std::string(" failures/calls to : ") + std::string(CGAL_PRETTY_FUNCTION), tmp);
Protect_FPU_rounding<Protection> P;
try {
typedef Lazy<std::pair<typename R1::AT, typename R2::AT>, std::pair<typename R1::ET, typename R2::ET>, EFT, E2A> Lazy_pair;
Lazy_pair lv(new Lazy_rep_2_2<AC, EC, E2A, L1, L2, R1, R2>(ac, ec, l1, l2));
// lv->approx() is a std::pair<R1::AT, R2::AT>;
r1 = R1(Handle_1(new Lazy_rep_1<void, void, First<std::pair<typename R1::AT, typename R2::AT> >, First<std::pair<typename R1::ET, typename R2::ET> >, E2A, Lazy_pair>(First<std::pair<typename R1::AT, typename R2::AT> >(), First<std::pair<typename R1::ET, typename R2::ET> >(), lv)));
r2 = R2(Handle_2(new Lazy_rep_1<void, void, Second<std::pair<typename R1::AT, typename R2::AT> >, Second<std::pair<typename R1::ET, typename R2::ET> >, E2A, Lazy_pair>(Second<std::pair<typename R1::AT, typename R2::AT> >(), Second<std::pair<typename R1::ET, typename R2::ET> >(), lv)));
} catch (Uncertain_conversion_exception&) {
CGAL_BRANCH_PROFILER_BRANCH(tmp);
Protect_FPU_rounding<!Protection> P2(CGAL_FE_TONEAREST);
typename R1::ET et1, et2;
ec(CGAL::exact(l1), CGAL::exact(l2), et1, et2);
r1 = R1(Handle_1(new Lazy_rep_0<typename R1::AT,typename R1::ET,E2A>(et1)));
r2 = R2(Handle_2(new Lazy_rep_0<typename R2::AT,typename R2::ET,E2A>(et2)));
}
}
};
// This is the magic functor for functors that write their result as Objects into an output iterator
template <typename LK, typename AC, typename EC>
struct Lazy_intersect_with_iterators
{
static const bool Protection = true;
typedef typename LK::Approximate_kernel AK;
typedef typename LK::Exact_kernel EK;
typedef typename EK::FT EFT;
typedef typename LK::E2A E2A;
typedef void result_type;
typedef Lazy<Object, Object, EFT, E2A> Lazy_object;
typedef Lazy<std::vector<Object>, std::vector<Object>, EFT, E2A> Lazy_vector;
AC ac;
EC ec;
public:
// In the example we intersect two Lazy<Segment>s
// and write into a back_inserter(list<Object([Lazy<Point>,Lazy<Segment>]) >)
template <typename L1, typename L2, typename OutputIterator>
OutputIterator
operator()(const L1& l1, const L2& l2, OutputIterator it) const
{
CGAL_BRANCH_PROFILER(std::string(" failures/calls to : ") + std::string(CGAL_PRETTY_FUNCTION), tmp);
Protect_FPU_rounding<Protection> P;
try {
Lazy_vector lv(new Lazy_rep_with_vector_2<AC, EC, E2A, L1, L2>(ac, ec, l1, l2));
// lv.approx() is a std::vector<Object([AK::Point_2,AK::Segment_2])>
// that is, when we get here we have constructed all approximate results
for (unsigned int i = 0; i < lv.approx().size(); i++) {
// FIXME : I'm not sure how this work...
#define CGAL_Kernel_obj(X) if (object_cast<typename AK::X>(& (lv.approx()[i]))) { \
*it++ = make_object(typename LK::X(new Lazy_rep_1<typename AK::X, typename EK::X, Ith<typename AK::X>, \
Ith<typename EK::X>, E2A, Lazy_vector> \
(Ith<typename AK::X>(i), Ith<typename EK::X>(i), lv))); \
continue; \
}
#include <CGAL/Kernel/interface_macros.h>
std::cerr << "we need more casts" << std::endl;
}
} catch (Uncertain_conversion_exception&) {
CGAL_BRANCH_PROFILER_BRANCH(tmp);
// TODO: Instead of using a vector, write an iterator adapter
Protect_FPU_rounding<!Protection> P2(CGAL_FE_TONEAREST);
std::vector<Object> exact_objects;
ec(CGAL::exact(l1), CGAL::exact(l2), std::back_inserter(exact_objects));
for (std::vector<Object>::const_iterator oit = exact_objects.begin();
oit != exact_objects.end();
++oit){
*it++ = make_lazy<LK>(*oit);
}
}
return it;
}
};
template <typename T>
struct Object_cast
{
typedef T result_type;
const T&
operator()(const Object& o) const
{
return *object_cast<T>(&o);
}
};
// The following functor returns an Object with a Lazy<Something> inside
// As the nested kernels return Objects of AK::Something and EK::Something
// we have to unwrap them from the Object, and wrap them in a Lazy<Something>
//
// TODO: write operators for other than two arguments. For the current kernel we only need two for Intersect_2
template <typename LK, typename AC, typename EC>
struct Lazy_construction_object
{
static const bool Protection = true;
typedef typename LK::Approximate_kernel AK;
typedef typename LK::Exact_kernel EK;
typedef typename EK::FT EFT;
typedef typename LK::E2A E2A;
typedef typename AC::result_type AT;
typedef typename EC::result_type ET;
typedef Object result_type;
typedef Lazy<Object, Object, EFT, E2A> Lazy_object;
AC ac;
EC ec;
public:
template <typename L1>
result_type
operator()(const L1& l1) const
{
CGAL_BRANCH_PROFILER(std::string(" failures/calls to : ") + std::string(CGAL_PRETTY_FUNCTION), tmp);
Protect_FPU_rounding<Protection> P;
try {
Lazy_object lo(new Lazy_rep_1<result_type, result_type, AC, EC, E2A, L1>(ac, ec, l1));
if(lo.approx().is_empty())
return Object();
#define CGAL_Kernel_obj(X) \
if (object_cast<typename AK::X>(& (lo.approx()))) { \
typedef Lazy_rep_1< typename AK::X, typename EK::X, Object_cast<typename AK::X>, Object_cast<typename EK::X>, E2A, Lazy_object> Lcr; \
Lcr * lcr = new Lcr(Object_cast<typename AK::X>(), Object_cast<typename EK::X>(), lo); \
return make_object(typename LK::X(lcr)); \
}
#include <CGAL/Kernel/interface_macros.h>
std::cerr << "object_cast inside Lazy_construction_rep::operator() failed. It needs more else if's (#1)" << std::endl;
std::cerr << "dynamic type of the Object : " << lo.approx().type().name() << std::endl;
} catch (Uncertain_conversion_exception&) {
CGAL_BRANCH_PROFILER_BRANCH(tmp);
Protect_FPU_rounding<!Protection> P2(CGAL_FE_TONEAREST);
ET eto = ec(CGAL::exact(l1));
return make_lazy<LK>(eto);
}
return Object();
}
template <typename L1, typename L2>
result_type
operator()(const L1& l1, const L2& l2) const
{
CGAL_BRANCH_PROFILER(std::string(" failures/calls to : ") + std::string(CGAL_PRETTY_FUNCTION), tmp);
Protect_FPU_rounding<Protection> P;
try {
Lazy_object lo(new Lazy_rep_2<result_type, result_type, AC, EC, E2A, L1, L2>(ac, ec, l1, l2));
if(lo.approx().is_empty())
return Object();
#define CGAL_Kernel_obj(X) \
if (object_cast<typename AK::X>(& (lo.approx()))) { \
typedef Lazy_rep_1<typename AK::X, typename EK::X, Object_cast<typename AK::X>, Object_cast<typename EK::X>, E2A, Lazy_object> Lcr; \
Lcr * lcr = new Lcr(Object_cast<typename AK::X>(), Object_cast<typename EK::X>(), lo); \
return make_object(typename LK::X(lcr)); \
}
#include <CGAL/Kernel/interface_macros.h>
// We now check vector<X>
#define CGAL_Kernel_obj(X) \
{ \
const std::vector<typename AK::X>* v_ptr;\
if ( (v_ptr = object_cast<std::vector<typename AK::X> >(& (lo.approx()))) ) { \
std::vector<typename LK::X> V;\
V.resize(v_ptr->size()); \
for (unsigned int i = 0; i < v_ptr->size(); i++) { \
V[i] = typename LK::X(new Lazy_rep_1<typename AK::X, typename EK::X, Ith_for_intersection<typename AK::X>, \
Ith_for_intersection<typename EK::X>, E2A, Lazy_object> \
(Ith_for_intersection<typename AK::X>(i), Ith_for_intersection<typename EK::X>(i), lo)); \
} \
return make_object(V); \
}\
}
CGAL_Kernel_obj(Point_2)
CGAL_Kernel_obj(Point_3)
#undef CGAL_Kernel_obj
std::cerr << "object_cast inside Lazy_construction_rep::operator() failed. It needs more else if's (#1)" << std::endl;
std::cerr << "dynamic type of the Object : " << lo.approx().type().name() << std::endl;
} catch (Uncertain_conversion_exception&) {
CGAL_BRANCH_PROFILER_BRANCH(tmp);
Protect_FPU_rounding<!Protection> P2(CGAL_FE_TONEAREST);
ET eto = ec(CGAL::exact(l1), CGAL::exact(l2));
return make_lazy<LK>(eto);
}
return Object();
}
template <typename L1, typename L2, typename L3>
result_type
operator()(const L1& l1, const L2& l2, const L3& l3) const
{
CGAL_BRANCH_PROFILER(std::string(" failures/calls to : ") + std::string(CGAL_PRETTY_FUNCTION), tmp);
Protect_FPU_rounding<Protection> P;
try {
Lazy_object lo(new Lazy_rep_3<result_type, result_type, AC, EC, E2A, L1, L2, L3>(ac, ec, l1, l2, l3));
if(lo.approx().is_empty())
return Object();
#define CGAL_Kernel_obj(X) \
if (object_cast<typename AK::X>(& (lo.approx()))) { \
typedef Lazy_rep_1<typename AK::X, typename EK::X, Object_cast<typename AK::X>, Object_cast<typename EK::X>, E2A, Lazy_object> Lcr; \
Lcr * lcr = new Lcr(Object_cast<typename AK::X>(), Object_cast<typename EK::X>(), lo); \
return make_object(typename LK::X(lcr)); \
}
#include <CGAL/Kernel/interface_macros.h>
std::cerr << "object_cast inside Lazy_construction_rep::operator() failed. It needs more else if's (#1)" << std::endl;
std::cerr << "dynamic type of the Object : " << lo.approx().type().name() << std::endl;
} catch (Uncertain_conversion_exception&) {
CGAL_BRANCH_PROFILER_BRANCH(tmp);
Protect_FPU_rounding<!Protection> P2(CGAL_FE_TONEAREST);
ET eto = ec(CGAL::exact(l1), CGAL::exact(l2), CGAL::exact(l3));
return make_lazy<LK>(eto);
}
return Object();
}
};
//____________________________________________________________
// The magic functor that has Lazy<Something> as result type.
// Two versions are distinguished: one that needs to fiddle
// with result_of and another that can forward the result types.
namespace internal {
BOOST_MPL_HAS_XXX_TRAIT_DEF(result_type)
// lift boost::get into a functor with a result_type member name and
// extend it to operate on optionals
// TODO there is a mismatch between the result_type typedef and the
// actual return type of operator()
template<typename T>
struct Variant_cast {
typedef T result_type;
template<BOOST_VARIANT_ENUM_PARAMS(typename U)>
const T&
operator()(const boost::optional< boost::variant< BOOST_VARIANT_ENUM_PARAMS(U) > >& o) const {
// can throw but should never because we always build it inside
// a static visitor with the right type
return boost::get<T>(*o);
}
template<BOOST_VARIANT_ENUM_PARAMS(typename U)>
T&
operator()(boost::optional< boost::variant< BOOST_VARIANT_ENUM_PARAMS(U) > >& o) const {
// can throw but should never because we always build it inside
// a static visitor with the right type, if it throws bad_get
return boost::get<T>(*o);
}
};
template<typename Result, typename AK, typename LK, typename EK, typename Origin>
struct Fill_lazy_variant_visitor_2 : boost::static_visitor<> {
Fill_lazy_variant_visitor_2(Result& r, Origin& o) : r(&r), o(&o) {}
Result* r;
Origin* o;
template<typename T>
void operator()(const T&) {
// the equivalent type we are currently matching in the lazy kernel
typedef T AKT;
typedef typename Type_mapper<AKT, AK, EK>::type EKT;
typedef typename Type_mapper<AKT, AK, LK>::type LKT;
typedef Lazy_rep_1<AKT, EKT, Variant_cast<AKT>, Variant_cast<EKT>, typename LK::E2A, Origin> Lcr;
Lcr * lcr = new Lcr(Variant_cast<AKT>(), Variant_cast<EKT>(), *o);
*r = LKT(lcr);
}
template<typename T>
void operator()(const std::vector<T>& t) {
typedef T AKT;
typedef typename Type_mapper<AKT, AK, EK>::type EKT;
typedef typename Type_mapper<AKT, AK, LK>::type LKT;
std::vector<LKT> V;
V.resize(t.size());
for (unsigned int i = 0; i < t.size(); i++) {
V[i] = LKT(new Lazy_rep_1<AKT, EKT, Ith_for_intersection<AKT>,
Ith_for_intersection<EKT>, typename LK::E2A, Origin>
(Ith_for_intersection<AKT>(i), Ith_for_intersection<EKT>(i), *o));
}
*r = V;
}
};
template<typename Result, typename AK, typename LK, typename EK>
struct Fill_lazy_variant_visitor_0 : boost::static_visitor<> {
Fill_lazy_variant_visitor_0(Result& r) : r(&r) {}
Result* r;
template<typename T>
void operator()(const T& t) {
// the equivalent type we are currently matching in the lazy kernel
typedef T EKT;
typedef typename Type_mapper<EKT, EK, AK>::type AKT;
typedef typename Type_mapper<EKT, EK, LK>::type LKT;
*r = LKT(new Lazy_rep_0<AKT, EKT, typename LK::E2A>(t));
}
template<typename T>
void operator()(const std::vector<T>& t) {
typedef T EKT;
typedef typename Type_mapper<EKT, EK, AK>::type AKT;
typedef typename Type_mapper<EKT, EK, LK>::type LKT;
std::vector<LKT> V;
V.resize(t.size());
for (unsigned int i = 0; i < t.size(); i++) {
V[i] = LKT(new Lazy_rep_0<AKT, EKT, typename LK::E2A>(t[i]));
}
*r = V;
}
};
} // internal
template <typename LK, typename AC, typename EC>
struct Lazy_construction_variant {
static const bool Protection = true;
typedef typename LK::Approximate_kernel AK;
typedef typename LK::Exact_kernel EK;
typedef typename EK::FT EFT;
typedef typename LK::E2A E2A;
template<typename>
struct result {
// this does not default, if you want to make a lazy lazy-kernel,
// you are on your own
};
#define CGAL_RESULT(z, n, d) \
template< typename F, BOOST_PP_ENUM_PARAMS(n, class T) > \
struct result<F( BOOST_PP_ENUM_PARAMS(n, T) )> { \
BOOST_PP_REPEAT(n, CGAL_TYPEMAP_AC, T) \
typedef typename Type_mapper< \
typename cpp11::result_of<AC( BOOST_PP_ENUM_PARAMS(n, A) )>::type, AK, LK>::type type; \
};
BOOST_PP_REPEAT_FROM_TO(1, 9, CGAL_RESULT, _)
template <typename L1, typename L2>
typename result<Lazy_construction_variant(L1, L2)>::type
operator()(const L1& l1, const L2& l2) const {
typedef typename cpp11::result_of<Lazy_construction_variant(L1, L2)>::type result_type;
typedef typename cpp11::result_of<AC(typename Type_mapper<L1, LK, AK>::type,
typename Type_mapper<L2, LK, AK>::type)>::type AT;
typedef typename cpp11::result_of<EC(typename Type_mapper<L1, LK, EK>::type,
typename Type_mapper<L2, LK, EK>::type)>::type ET;
CGAL_BRANCH_PROFILER(std::string(" failures/calls to : ") + std::string(CGAL_PRETTY_FUNCTION), tmp);
Protect_FPU_rounding<Protection> P;
try {
Lazy<AT, ET, EFT, E2A> lazy(new Lazy_rep_2<AT, ET, AC, EC, E2A, L1, L2>(AC(), EC(), l1, l2));
// the approximate result requires the trait with types from the AK
AT approx_v = lazy.approx();
// the result we build
result_type res;
if(!approx_v) {
// empty
return res;
}
// the static visitor fills the result_type with the correct unwrapped type
internal::Fill_lazy_variant_visitor_2< result_type, AK, LK, EK, Lazy<AT, ET, EFT, E2A> > visitor(res, lazy);
boost::apply_visitor(visitor, *approx_v);
return res;
} catch (Uncertain_conversion_exception&) {
CGAL_BRANCH_PROFILER_BRANCH(tmp);
Protect_FPU_rounding<!Protection> P2(CGAL_FE_TONEAREST);
ET exact_v = EC()(CGAL::exact(l1), CGAL::exact(l2));
result_type res;
if(!exact_v) {
return res;
}
internal::Fill_lazy_variant_visitor_0<result_type, AK, LK, EK> visitor(res);
boost::apply_visitor(visitor, *exact_v);
return res;
}
}
template <typename L1, typename L2, typename L3>
typename result<Lazy_construction_variant(L1, L2, L3)>::type
operator()(const L1& l1, const L2& l2, const L3& l3) const {
typedef typename result<Lazy_construction_variant(L1, L2, L3)>::type result_type;
typedef typename cpp11::result_of<AC(typename Type_mapper<L1, LK, AK>::type,
typename Type_mapper<L2, LK, AK>::type,
typename Type_mapper<L3, LK, AK>::type)>::type AT;
typedef typename cpp11::result_of<EC(typename Type_mapper<L1, LK, EK>::type,
typename Type_mapper<L2, LK, EK>::type,
typename Type_mapper<L3, LK, EK>::type)>::type ET;
CGAL_BRANCH_PROFILER(std::string(" failures/calls to : ") + std::string(CGAL_PRETTY_FUNCTION), tmp);
Protect_FPU_rounding<Protection> P;
try {
Lazy<AT, ET, EFT, E2A> lazy(new Lazy_rep_3<AT, ET, AC, EC, E2A, L1, L2, L3>(AC(), EC(), l1, l2, l3));
// the approximate result requires the trait with types from the AK
AT approx_v = lazy.approx();
// the result we build
result_type res;
if(!approx_v) {
// empty
return res;
}
// the static visitor fills the result_type with the correct unwrapped type
internal::Fill_lazy_variant_visitor_2< result_type, AK, LK, EK, Lazy<AT, ET, EFT, E2A> > visitor(res, lazy);
boost::apply_visitor(visitor, *approx_v);
return res;
} catch (Uncertain_conversion_exception&) {
CGAL_BRANCH_PROFILER_BRANCH(tmp);
Protect_FPU_rounding<!Protection> P2(CGAL_FE_TONEAREST);
ET exact_v = EC()(CGAL::exact(l1), CGAL::exact(l2), CGAL::exact(l3));
result_type res;
if(!exact_v) {
return res;
}
internal::Fill_lazy_variant_visitor_0< result_type, AK, LK, EK> visitor(res);
boost::apply_visitor(visitor, *exact_v);
return res;
}
}
};
template<typename LK, typename AC, typename EC, typename E2A = Default,
bool has_result_type = internal::has_result_type<AC>::value && internal::has_result_type<EC>::value >
struct Lazy_construction;
// we have a result type, low effort
template<typename LK, typename AC, typename EC, typename E2A_>
struct Lazy_construction<LK, AC, EC, E2A_, true> {
static const bool Protection = true;
typedef typename LK::Approximate_kernel AK;
typedef typename LK::Exact_kernel EK;
typedef typename boost::remove_cv<
typename boost::remove_reference < typename AC::result_type >::type >::type AT;
typedef typename boost::remove_cv<
typename boost::remove_reference < typename EC::result_type >::type >::type ET;
typedef typename EK::FT EFT;
typedef typename Default::Get<E2A_, typename LK::E2A>::type E2A;
typedef typename Type_mapper<AT, AK, LK>::type result_type;
AC ac;
EC ec;
#define CGAL_CONSTRUCTION_OPERATOR(z, n, d ) \
template<BOOST_PP_ENUM_PARAMS(n, class L)> \
result_type \
operator()( BOOST_PP_ENUM(n, CGAL_LARGS, _) ) const { \
typedef Lazy< AT, ET, EFT, E2A> Handle; \
CGAL_BRANCH_PROFILER(std::string(" failures/calls to : ") + std::string(CGAL_PRETTY_FUNCTION), tmp); \
Protect_FPU_rounding<Protection> P; \
try { \
return result_type( Handle(new Lazy_rep_##n<AT, ET, AC, EC, E2A, BOOST_PP_ENUM_PARAMS(n, L)>(ac, ec, BOOST_PP_ENUM_PARAMS(n, l)))); \
} catch (Uncertain_conversion_exception&) { \
CGAL_BRANCH_PROFILER_BRANCH(tmp); \
Protect_FPU_rounding<!Protection> P2(CGAL_FE_TONEAREST); \
return result_type( Handle(new Lazy_rep_0<AT,ET,E2A>(ec( BOOST_PP_ENUM(n, CGAL_LEXACT, _) ))) ); \
} \
}
// arity 1-8
BOOST_PP_REPEAT_FROM_TO(1, 9, CGAL_CONSTRUCTION_OPERATOR, _)
// nullary
result_type
operator()() const
{
typedef Lazy<AT, ET, EFT, E2A> Handle;
return result_type( Handle(new Lazy_rep_0<AT,ET,E2A>()) );
}
#undef CGAL_CONSTRUCTION_OPERATOR
};
template <typename LK, typename AC, typename EC, typename E2A_>
struct Lazy_construction<LK, AC, EC, E2A_, false>
{
static const bool Protection = true;
typedef typename LK::Approximate_kernel AK;
typedef typename LK::Exact_kernel EK;
typedef typename EK::FT EFT;
typedef typename Default::Get<E2A_, typename LK::E2A>::type E2A;
template<typename>
struct result {
// this does not default, if you want to make a lazy lazy-kernel,
// you are on your own
};
AC ac;
EC ec;
// acquire the result_type of the approximate kernel, map it back to the lazy kernel object
#define CGAL_RESULT(z, n, d) \
template< typename F, BOOST_PP_ENUM_PARAMS(n, class T) > \
struct result<F( BOOST_PP_ENUM_PARAMS(n, T) )> { \
BOOST_PP_REPEAT(n, CGAL_TYPEMAP_AC, T) \
typedef typename Type_mapper< typename cpp11::result_of<AC( BOOST_PP_ENUM_PARAMS(n, A) )>::type, AK, LK>::type type; \
};
BOOST_PP_REPEAT_FROM_TO(1, 9, CGAL_RESULT, _)
#define CGAL_CONSTRUCTION_OPERATOR(z, n, d) \
template<BOOST_PP_ENUM_PARAMS(n, class L)> \
typename cpp11::result_of<Lazy_construction(BOOST_PP_ENUM_PARAMS(n, L))>::type \
operator()( BOOST_PP_ENUM(n, CGAL_LARGS, _) ) const { \
BOOST_PP_REPEAT(n, CGAL_TYPEMAP_EC, L) \
BOOST_PP_REPEAT(n, CGAL_TYPEMAP_AC, L) \
typedef typename boost::remove_cv< typename boost::remove_reference < \
typename cpp11::result_of< EC(BOOST_PP_ENUM_PARAMS(n, E)) >::type >::type >::type ET; \
typedef typename boost::remove_cv< typename boost::remove_reference < \
typename cpp11::result_of< AC(BOOST_PP_ENUM_PARAMS(n, A)) >::type >::type >::type AT; \
typedef Lazy< AT, ET, EFT, E2A> Handle; \
typedef typename cpp11::result_of<Lazy_construction(BOOST_PP_ENUM_PARAMS(n, L))>::type result_type; \
CGAL_BRANCH_PROFILER(std::string(" failures/calls to : ") + std::string(CGAL_PRETTY_FUNCTION), tmp); \
Protect_FPU_rounding<Protection> P; \
try { \
return result_type( Handle(new Lazy_rep_##n<AT, ET, AC, EC, E2A, BOOST_PP_ENUM_PARAMS(n, L)>(ac, ec, BOOST_PP_ENUM_PARAMS(n, l)))); \
} catch (Uncertain_conversion_exception&) { \
CGAL_BRANCH_PROFILER_BRANCH(tmp); \
Protect_FPU_rounding<!Protection> P2(CGAL_FE_TONEAREST); \
return result_type( Handle(new Lazy_rep_0<AT,ET,E2A>(ec( BOOST_PP_ENUM(n, CGAL_LEXACT, _) ))) ); \
} \
}
// arity 1-8
BOOST_PP_REPEAT_FROM_TO(1, 9, CGAL_CONSTRUCTION_OPERATOR, _)
// nullary
typename Type_mapper< typename cpp11::result_of<AC()>::type ,AK, LK>::type
operator()() const
{
typedef typename cpp11::result_of<AC()>::type AT;
typedef typename cpp11::result_of<EC()>::type ET;
typedef Lazy<AT, ET, EFT, E2A> Handle;
typedef typename Type_mapper< typename cpp11::result_of<AC()>::type ,AK, LK>::type result_type;
return result_type( Handle(new Lazy_rep_0<AT,ET,E2A>()) );
}
};
} //namespace CGAL
#undef CGAL_TYPEMAP_AC
#undef CGAL_TYPEMAP_EC
#undef CGAL_LEXACT
#undef CGAL_LARGS
#include <CGAL/enable_warnings.h>
#endif // CGAL_LAZY_H
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