QuantLib
: a free/open-source library for quantitative finance
fully annotated source code - version 1.34
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ql
experimental
math
piecewisefunction.hpp
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/* -*- mode: c++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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Copyright (C) 2015 Peter Caspers
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This file is part of QuantLib, a free-software/open-source library
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for financial quantitative analysts and developers - http://quantlib.org/
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QuantLib is free software: you can redistribute it and/or modify it
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under the terms of the QuantLib license. You should have received a
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copy of the license along with this program; if not, please email
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<quantlib-dev@lists.sf.net>. The license is also available online at
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<http://quantlib.org/license.shtml>.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the license for more details.
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*/
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/*! \file piecewisefunction.hpp
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\brief utility macro for piecewise functions
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*/
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#ifndef quantlib_piecewise_function_hpp
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#define quantlib_piecewise_function_hpp
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#include <
ql/qldefines.hpp
>
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#include <algorithm>
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/*! This defines a piecewise constant function which is RCLL and takes
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the values Y[0], Y[1], ... Y[n] on the intervals
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(-\infty, X[0]), [ X[1], X[2] ), ... , [ X[n-1], \infty)
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Normally Y.size() should be X.size() + 1. If more values for Y are
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given, they are ignored. If less values are given the last given
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value is kept the same for the remaining intervals.
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If X.size() is 0 a constant function taking the value Y[0] is
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evaluated.
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\warning If Y.size() is 0, an invalid access occurs. This
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condition is not checked for performance reasons.
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*/
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#define QL_PIECEWISE_FUNCTION(X, Y, x) \
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Y[std::min<std::size_t>( \
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std::upper_bound(X.begin(), X.end(), x) - X.begin(), Y.size() - 1)]
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#endif
qldefines.hpp
Global definitions and compiler switches.
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