Emily Boudreaux
856ab51b4c
we need an autodiff library at some point (or we need to roll our own but I do not think that makes sense). CppAD is well tested and header only and easy to include. It is also Liscene compatible with GPL v3.0. Here we bring it in as a dependency
118 lines
3.4 KiB
C++
118 lines
3.4 KiB
C++
# ifndef CPPAD_CORE_BASE2AD_HPP
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# define CPPAD_CORE_BASE2AD_HPP
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/* --------------------------------------------------------------------------
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CppAD: C++ Algorithmic Differentiation: Copyright (C) 2003-20 Bradley M. Bell
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CppAD is distributed under the terms of the
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Eclipse Public License Version 2.0.
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This Source Code may also be made available under the following
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Secondary License when the conditions for such availability set forth
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in the Eclipse Public License, Version 2.0 are satisfied:
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GNU General Public License, Version 2.0 or later.
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---------------------------------------------------------------------------- */
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/*
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$begin base2ad$$
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$spell
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af
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Taylor
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$$
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$spell
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$$
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$section Create an AD<Base> Function From a Base Function$$
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$head Syntax$$
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$icode%af% = %f%.base2ad()%$$
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$head See Also$$
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$cref mul_level$$
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$head Base$$
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This is the base type used to recorded the operation sequence in $icode f$$
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and $icode af$$; i.e., the type $codei%AD<%Base%>%$$ was used to record
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the operation sequence.
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$head f$$
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This object has prototype
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$codei%
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ADFun<%Base%> %f%
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%$$
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It does it's derivative calculations using the type $icode Base$$.
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$head af$$
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This object has prototype
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$codei%
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ADFun< AD<%Base%> , %Base% > %af%
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%$$
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It has the same operation sequence as $icode f$$,
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but it does it's derivative calculations using the type
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$codei%AD<%Base>%$$.
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This enables one to record new functions that are defined
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using derivatives of the function $icode f$$.
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Initially, there are no Taylor coefficients stored in $icode af$$ and
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$cref%af.size_order()%size_order%$$ is zero.
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$children%
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example/general/base2ad.cpp
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%$$
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$head Example$$
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The file $cref base2ad.cpp$$
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contains an example and test of this operation.
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$end
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----------------------------------------------------------------------------
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*/
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namespace CppAD { // BEGIN_CPPAD_NAMESPACE
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/*!
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\file base2ad.hpp
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*/
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/// Create an ADFun< AD<Base>, Base > from this ADFun<Base>
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template <class Base, class RecBase>
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ADFun< AD<Base>, RecBase > ADFun<Base,RecBase>::base2ad(void) const
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{ ADFun< AD<Base>, RecBase > fun;
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//
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// bool values
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fun.has_been_optimized_ = has_been_optimized_;
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fun.check_for_nan_ = check_for_nan_;
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//
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// size_t values
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fun.compare_change_count_ = compare_change_count_;
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fun.compare_change_number_ = compare_change_number_;
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fun.compare_change_op_index_ = compare_change_op_index_;
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CPPAD_ASSERT_UNKNOWN( fun.num_order_taylor_ == 0 ) ;
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CPPAD_ASSERT_UNKNOWN( fun.cap_order_taylor_ == 0 );
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CPPAD_ASSERT_UNKNOWN( fun.num_direction_taylor_ == 0 );
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fun.num_var_tape_ = num_var_tape_;
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//
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// pod_vector objects
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fun.ind_taddr_ = ind_taddr_;
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fun.dep_taddr_ = dep_taddr_;
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fun.dep_parameter_ = dep_parameter_;
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fun.cskip_op_ = cskip_op_;
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fun.load_op2var_ = load_op2var_;
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//
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// pod_maybe_vector< AD<Base> > = pod_maybe_vector<Base>
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CPPAD_ASSERT_UNKNOWN( fun.taylor_.size() == 0 );
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//
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// player
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// (uses move semantics)
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fun.play_ = play_.base2ad();
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//
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// subgraph
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fun.subgraph_info_ = subgraph_info_;
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//
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// sparse_pack
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fun.for_jac_sparse_pack_ = for_jac_sparse_pack_;
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//
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// sparse_list
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fun.for_jac_sparse_set_ = for_jac_sparse_set_;
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//
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return fun;
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}
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} // END_CPPAD_NAMESPACE
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# endif
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