QuantLib: a free/open-source library for quantitative finance
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earlyexercisepathpricer.hpp
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1/* -*- mode: c++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2
3/*
4 Copyright (C) 2006 Klaus Spanderen
5
6 This file is part of QuantLib, a free-software/open-source library
7 for financial quantitative analysts and developers - http://quantlib.org/
8
9 QuantLib is free software: you can redistribute it and/or modify it
10 under the terms of the QuantLib license. You should have received a
11 copy of the license along with this program; if not, please email
12 <quantlib-dev@lists.sf.net>. The license is also available online at
13 <http://quantlib.org/license.shtml>.
14
15 This program is distributed in the hope that it will be useful, but WITHOUT
16 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
17 FOR A PARTICULAR PURPOSE. See the license for more details.
18*/
19
20/*! \file earlyexercisepathpricer.hpp
21 \brief base class for early exercise single-path pricers
22*/
23
24#ifndef quantlib_early_exercise_path_pricer_hpp
25#define quantlib_early_exercise_path_pricer_hpp
26
27#include <ql/math/array.hpp>
30#include <ql/functional.hpp>
31
32namespace QuantLib {
33
34 template <class PathType>
36 // dummy definition, will not work
37 };
38
39 template <>
41 public:
42 typedef Real StateType;
43 static Size pathLength(const Path& path) {
44 return path.length();
45 }
46 };
47
48 template <>
50 public:
52 static Size pathLength(const MultiPath& path) {
53 return path.pathSize();
54 }
55 };
56
57 //! base class for early exercise path pricers
58 /*! Returns the value of an option on a given path and given time.
59
60 \ingroup mcarlo
61 */
62 template<class PathType,
63 class TimeType=Size, class ValueType=Real>
65 public:
67
68 virtual ~EarlyExercisePathPricer() = default;
69 virtual ValueType operator()(const PathType& path,
70 TimeType t) const = 0;
71
72 virtual StateType
73 state(const PathType& path, TimeType t) const = 0;
74 virtual std::vector<ext::function<ValueType(StateType)> >
75 basisSystem() const = 0;
76 };
77}
78
79
80#endif
1-D array used in linear algebra.
1-D array used in linear algebra.
Definition: array.hpp:52
base class for early exercise path pricers
virtual StateType state(const PathType &path, TimeType t) const =0
virtual ~EarlyExercisePathPricer()=default
virtual ValueType operator()(const PathType &path, TimeType t) const =0
EarlyExerciseTraits< PathType >::StateType StateType
virtual std::vector< ext::function< ValueType(StateType)> > basisSystem() const =0
static Size pathLength(const MultiPath &path)
Correlated multiple asset paths.
Definition: multipath.hpp:39
Size pathSize() const
Definition: multipath.hpp:48
single-factor random walk
Definition: path.hpp:40
Size length() const
Definition: path.hpp:94
const DefaultType & t
Maps function, bind and cref to either the boost or std implementation.
QL_REAL Real
real number
Definition: types.hpp:50
std::size_t Size
size of a container
Definition: types.hpp:58
Correlated multiple asset paths.
Definition: any.hpp:35
single factor random walk