/usr/include/trilinos/ROL_Elementwise_Function.hpp is in libtrilinos-rol-dev 12.12.1-5.
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// ************************************************************************
//
// Rapid Optimization Library (ROL) Package
// Copyright (2014) Sandia Corporation
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// @HEADER
#ifndef ROL_ELEMENTWISE_FUNCTION_H
#define ROL_ELEMENTWISE_FUNCTION_H
#include "Teuchos_CommHelpers.hpp"
namespace ROL {
template<class Real>
class Vector;
namespace Elementwise {
// Interface class with function of a single argument
template<class Real>
class UnaryFunction {
public:
virtual ~UnaryFunction() {}
virtual Real apply( const Real &x ) const = 0;
};
// Wrap a generic function/functor of a single argument
template<class Real, class Func>
class UnaryFunctionWrapper : public UnaryFunction<Real> {
public:
UnaryFunctionWrapper( const Func &f ) : f_(f) {}
Real apply( const Real &x ) const {
return f_(x);
}
private:
Func f_;
};
// Apply a Unary function to a ROL Vector
template<class Real>
void applyUnaryInPlace(ROL::Vector<Real> &x, const UnaryFunction<Real> &f) {
x.applyUnary(f);
}
// Wrap a generic single argument function or functor and and apply it to a ROL Vector
template<class Real, class Func>
void applyUnaryInPlace(ROL::Vector<Real> &x, Func f) {
UnaryFunctionWrapper<Real,Func> f_wrapped(f);
x.applyUnary(f_wrapped);
}
// Interface class with function of two arguments
template<class Real>
class BinaryFunction {
public:
virtual ~BinaryFunction() {}
virtual Real apply( const Real &x, const Real &y ) const = 0;
};
// Wrap a generic function/functor of two arguments
template<class Real, class Func>
class BinaryFunctionWrapper : public BinaryFunction<Real> {
public:
BinaryFunctionWrapper( const Func &f ) : f_(f) {}
Real apply( const Real &x, const Real &y ) const {
return f_(x,y);
}
private:
Func f_;
};
// Apply a Binary function to a ROL Vector
template<class Real>
void applyBinaryInPlace(ROL::Vector<Real> &x, const ROL::Vector<Real> &y, const BinaryFunction<Real> &f) {
x.applyBinary(f,y);
}
// Wrap a generic two argument function or functor and and apply it to a ROL Vector
template<class Real, class Func>
void applyBinaryInPlace(ROL::Vector<Real> &x, const ROL::Vector<Real> &y, Func f) {
BinaryFunctionWrapper<Real,Func> f_wrapped(f);
x.applyBinary(f_wrapped,y);
}
} // namespace Elementwise
} // namespace ROL
#include <ROL_Elementwise_Reduce.hpp>
#include <ROL_UnaryFunctions.hpp>
#include <ROL_BinaryFunctions.hpp>
#endif
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