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/usr/include/CLHEP/GenericFunctions/SymToArgAdaptor.icc is in libclhep-dev 2.1.2.3-1.

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// -*- C++ -*-
// $Id:
#include "SymToArgAdaptor.hh"
#include <assert.h>
#include <iostream>
#include <cfloat>

namespace Genfun {


//FUNCTION_OBJECT_IMP(SymToArgAdaptor) Do it by hand here:

template <class F>
inline
FunctionComposition SymToArgAdaptor<F>::operator()(const AbsFunction & function) const
{                                            
  return AbsFunction::operator() (function); 
}     
                 
template <class F>                      
inline
SymToArgAdaptor<F> *SymToArgAdaptor<F>::clone () const {       
  return (SymToArgAdaptor<F> *) _clone();             
}
                                            
template <class F>                      
inline
AbsFunction *SymToArgAdaptor<F>::_clone () const {    
  return new SymToArgAdaptor<F>(*this);                       
}
template <class F>
inline
ParameterComposition SymToArgAdaptor<F>::operator()(const AbsParameter & p) const
{                                            \
  return AbsFunction::operator() (p);        \
}      

template<class F> 
inline
SymToArgAdaptor<F>::SymToArgAdaptor(F        &function,
				    const AbsFunction & f_expression,
				    SymToArgAdaptor<F>::ScopedMethodPtr parameterFetchMethod,
	                            const AbsFunction * p_expression):

  _function(function.clone()),
  _f_expression(f_expression.clone()),
  _parameterFetchMethod(parameterFetchMethod),
  _p_expression(p_expression->clone())

{
  _parameterFetchMethod(*_function).setLowerLimit(-DBL_MAX);
  _parameterFetchMethod(*_function).setUpperLimit(+DBL_MAX);
  assert(f_expression.dimensionality()==p_expression->dimensionality());
}

template <class F>
inline
SymToArgAdaptor<F>::~SymToArgAdaptor() {
  delete _function;
  delete _f_expression;
  delete _p_expression;
}

template <class F>
inline
SymToArgAdaptor<F>::SymToArgAdaptor(const SymToArgAdaptor & right):
  _function(right._function->clone()),
  _f_expression(right._f_expression->clone()),
  _parameterFetchMethod(right._parameterFetchMethod),
  _p_expression(right._p_expression->clone())
{
  _parameterFetchMethod(*_function).setLowerLimit(-DBL_MAX);
  _parameterFetchMethod(*_function).setUpperLimit(+DBL_MAX);
}


template <class F>
inline
double SymToArgAdaptor<F>::operator ()(double x) const
{
  std::cerr
    << "Warning.  SymToArgAdaptor called with scalar argument"
    << std::endl;
  assert(0);
  return 0;
}

template <class F>
inline
unsigned int SymToArgAdaptor<F>::dimensionality() const {
  return _f_expression->dimensionality();
}

template <class F> 
inline
double SymToArgAdaptor<F>::operator() (const Argument & a) const {
  if (dimensionality()!= a.dimension()) {
    std::cerr
      << "Warning: SymToArgAdaptor function/argument dimension mismatch"
      <<  std::endl;
    assert(0);
    return 0;
  }

  // First evaluate the sumbol.
  double pVal= (*_p_expression)(a);
  
  // Then set the associated parameter:
  (_parameterFetchMethod(*_function)).setValue(pVal);
  
  // Now evaluate the function:
  return (*_function)((*_f_expression) (a));
}
} // end of namespace Genfun