#include "optional.h"

Optional_Integer::Optional_Integer(int i)
    : data { new int {i} }
{}

Optional_Integer::Optional_Integer(Optional_Integer const & other)
: Optional_Integer{}
{
    if ( other.has_value() )
    {
        data = new int{*other.data};
    }
}

Optional_Integer::~Optional_Integer()
{
    delete data;
}

void Optional_Integer::swap(Optional_Integer & other)
{
    std::swap(data, other.data);
}

int & Optional_Integer::operator*() noexcept
{
    return *data;
}

int & Optional_Integer::value()
{
    if ( has_value() )
        return *data;
    throw invalid_optional_access{"no value stored"};
}

Optional_Integer & Optional_Integer::operator=(int val)
{
    if ( has_value() )
        *data = val;
    else
        data = new int{val};
    return *this;
}

Optional_Integer & Optional_Integer::operator=(Optional_Integer const & rhs)
{
    Optional_Integer{rhs}.swap(*this);
    return *this;
}

void Optional_Integer::reset()
{
    delete data;
    data = nullptr;
}

bool Optional_Integer::has_value() const noexcept
{
    return data != nullptr;
}