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1
2/*
3 [auto_generated]
4 boost/numeric/odeint/iterator/n_step_iterator.hpp
5
6 [begin_description]
7 Iterator for iterating through the solution of an ODE with constant step size performing exactly n steps.
8 [end_description]
9
10 Copyright 2009-2013 Karsten Ahnert
11 Copyright 2009-2013 Mario Mulansky
12
13 Distributed under the Boost Software License, Version 1.0.
14 (See accompanying file LICENSE_1_0.txt or
15 copy at http://www.boost.org/LICENSE_1_0.txt)
16 */
17
18
19#ifndef BOOST_NUMERIC_ODEINT_ITERATOR_N_STEP_ITERATOR_HPP_INCLUDED
20#define BOOST_NUMERIC_ODEINT_ITERATOR_N_STEP_ITERATOR_HPP_INCLUDED
21
22
23#include <boost/numeric/odeint/util/stepper_traits.hpp>
24#include <boost/numeric/odeint/stepper/stepper_categories.hpp>
25#include <boost/numeric/odeint/iterator/detail/ode_iterator_base.hpp>
26#include <boost/numeric/odeint/iterator/impl/n_step_iterator_impl.hpp>
27
28
29namespace boost {
30namespace numeric {
31namespace odeint {
32
33
34 /* use the n_step_iterator_impl with the right tags */
35 template< class Stepper , class System , class State
36#ifndef DOXYGEN_SKIP
37 , class StepperTag = typename base_tag< typename traits::stepper_category< Stepper >::type >::type
38#endif
39 >
40 class n_step_iterator : public n_step_iterator_impl<
41 n_step_iterator< Stepper , System , State , StepperTag > ,
42 Stepper , System , State , detail::ode_state_iterator_tag , StepperTag
43 >
44 {
45 typedef typename traits::time_type< Stepper >::type time_type;
46 typedef n_step_iterator< Stepper , System , State , StepperTag > iterator_type;
47
48 public:
49 n_step_iterator( Stepper stepper , System sys , State &s , time_type t , time_type dt , size_t num_of_steps )
50 : n_step_iterator_impl< iterator_type , Stepper , System , State , detail::ode_state_iterator_tag , StepperTag >( stepper , sys , s , t , dt , num_of_steps )
51 {}
52
53 n_step_iterator( Stepper stepper , System sys , State &s )
54 : n_step_iterator_impl< iterator_type , Stepper , System , State , detail::ode_state_iterator_tag , StepperTag >( stepper , sys , s )
55 {}
56 };
57
58 /* make functions */
59
60 template< class Stepper , class System , class State >
61 n_step_iterator< Stepper , System, State > make_n_step_iterator_begin(
62 Stepper stepper ,
63 System system ,
64 State &x ,
65 typename traits::time_type< Stepper >::type t ,
66 typename traits::time_type< Stepper >::type dt ,
67 size_t num_of_steps )
68 {
69 return n_step_iterator< Stepper , System , State >( stepper , system , x , t , dt , num_of_steps );
70 }
71
72 template< class Stepper , class System , class State >
73 n_step_iterator< Stepper , System , State > make_n_step_iterator_end(
74 Stepper stepper ,
75 System system ,
76 State &x )
77 {
78 return n_step_iterator< Stepper , System , State >( stepper , system , x );
79 }
80
81 template< class Stepper , class System , class State >
82 std::pair< n_step_iterator< Stepper , System , State > , n_step_iterator< Stepper , System , State > >
83 make_n_step_range(
84 Stepper stepper ,
85 System system ,
86 State &x ,
87 typename traits::time_type< Stepper >::type t ,
88 typename traits::time_type< Stepper >::type dt ,
89 size_t num_of_steps )
90 {
91 return std::make_pair(
92 n_step_iterator< Stepper , System , State >( stepper , system , x , t , dt , num_of_steps ) ,
93 n_step_iterator< Stepper , System , State >( stepper , system , x )
94 );
95 }
96
97
98 /**
99 * \class n_step_iterator
100 *
101 * \brief ODE Iterator with constant step size. The value type of this iterator is the state type of the stepper.
102 *
103 * Implements an iterator representing the solution of an ODE starting from t
104 * with n steps and a constant step size dt.
105 * After each iteration the iterator dereferences to the state x at the next
106 * time t+dt.
107 * This iterator can be used with Steppers and
108 * DenseOutputSteppers and it always makes use of the all the given steppers
109 * capabilities. A for_each over such an iterator range behaves similar to
110 * the integrate_n_steps routine.
111 *
112 * n_step_iterator is a model of single-pass iterator.
113 *
114 * The value type of this iterator is the state type of the stepper. Hence one can only access the state and not the current time.
115 *
116 * \tparam Stepper The stepper type which should be used during the iteration.
117 * \tparam System The type of the system function (ODE) which should be solved.
118 * \tparam State The state type of the ODE.
119 */
120
121
122 /**
123 * \fn make_n_step_iterator_begin( Stepper stepper , System system , State &x , typename traits::time_type< Stepper >::type t , typename traits::time_type< Stepper >::type dt , size_t num_of_steps )
124 *
125 * \brief Factory function for n_step_iterator. Constructs a begin iterator.
126 *
127 * \param stepper The stepper to use during the iteration.
128 * \param system The system function (ODE) to solve.
129 * \param x The initial state. const_step_iterator stores a reference of s and changes its value during the iteration.
130 * \param t The initial time.
131 * \param dt The initial time step.
132 * \param num_of_steps The number of steps to be executed.
133 * \returns The n-step iterator.
134 */
135
136
137 /**
138 * \fn make_n_step_iterator_end( Stepper stepper , System system , State &x )
139 * \brief Factory function for n_step_iterator. Constructs an end iterator.
140 *
141 * \param stepper The stepper to use during the iteration.
142 * \param system The system function (ODE) to solve.
143 * \param x The initial state. const_step_iterator stores a reference of s and changes its value during the iteration.
144 * \returns The const_step_iterator.
145 */
146
147
148 /**
149 * \fn make_n_step_range( Stepper stepper , System system , State &x , typename traits::time_type< Stepper >::type t , typename traits::time_type< Stepper >::type dt , , size_t num_of_steps )
150 *
151 * \brief Factory function to construct a single pass range of n-step iterators. A range is here a pair
152 * of n_step_iterator.
153 *
154 * \param stepper The stepper to use during the iteration.
155 * \param system The system function (ODE) to solve.
156 * \param x The initial state. const_step_iterator store a reference of s and changes its value during the iteration.
157 * \param t The initial time.
158 * \param dt The initial time step.
159 * \param num_of_steps The number of steps to be executed.
160 * \returns The n-step range.
161 */
162
163
164} // namespace odeint
165} // namespace numeric
166} // namespace boost
167
168#endif // BOOST_NUMERIC_ODEINT_ITERATOR_CONST_N_STEP_ITERATOR_HPP_INCLUDED