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function.cxx
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function.cxx
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#include <stdexcept>
#include <string>
#include "function.hxx"
#include "variable.hxx"
//////////////////
// Constructors //
//////////////////
function::function() : _args(1)
{
_args[0] = std::make_shared<variable>();
_fptr = [](std::vector<double> & args) { return args.front(); };
}
function::function(fptr_t fptr, std::vector<double> & args)
: _fptr(fptr), _args(args.size(), nullptr)
{
unsigned size(args.size());
for (unsigned i = 0; i < size; ++i) {
_args[i] = std::make_shared<variable>(args[i]);
}
}
function::function(fptr_t fptr, unsigned num, double * args)
: _fptr(fptr), _args(num, nullptr)
{
for (unsigned i = 0; i < num; ++i) {
_args[i] = std::make_shared<variable>(args[i]);
}
}
function::function(fptr_t fptr, fnbase_ptr_vec & args)
: _fptr(fptr), _args(args) {}
function::function(fptr_t fptr, unsigned num, fnbase_ptr * args)
: _fptr(fptr), _args(args, args + num) {}
function::function(fptr_t fptr, std::vector<fnbase*> & args)
: _fptr(fptr), _args(args.size(), nullptr)
{
unsigned size(args.size());
for (unsigned i = 0; i < size; ++i) {
_args[i] = fnbase_ptr(args[i]);
}
}
function::function(fptr_t fptr, unsigned num, fnbase * args)
: _fptr(fptr), _args(num)
{
for (unsigned i = 0; i < num; ++i) {
_args[i] = fnbase_ptr(&args[i]);
}
}
function::function(const function & other)
: _fptr(other._fptr), _args(other._args) {}
function::~function() {}
///////////////
// Operators //
///////////////
auto function::operator=(const function & other) -> function &
{
if (this != &other) {
_fptr = other._fptr;
_args = other._args;
}
return *this;
}
bool function::operator==(const function & other) const
{
return (other._args == _args and
other._fptr.target<__fptr_sig__>() == _fptr.target<__fptr_sig__>());
// Comparison of functor objects is hard, see header file
}
bool function::operator!=(const function & other) const
{
return not (*this == other);
}
function::operator double () const
{
std::vector<double> args;
args.reserve(_args.size());
for (auto arg_ptr : _args) {
args.push_back(*arg_ptr); // arg_ptr is fnbase_ptr
}
return _fptr(args);
}
fnbase_ptr & function::operator[](std::size_t idx)
{
return _args[idx];
}
const fnbase_ptr & function::operator[](std::size_t idx) const
{
return const_cast<fnbase_ptr&>((*this)[idx]);
}
/////////////
// Methods //
/////////////
void function::replace(std::size_t idx, fnbase * arg)
{
if (idx >= _args.size())
throw std::out_of_range("Index out of range: "
+ std::to_string(_args.size()) + "(size) >= "
+ std::to_string(idx) + "(index)");
_args.at(idx) = fnbase_ptr(arg);
}
auto function::components() -> fnbase_ptr_vec &
{
return _args;
}