Flexible C++ #4: Efficient Integer To String Conversions
By Matthew Wilson, December 01, 2003
This is the final installment in the integer-to-string series. The previous two installments and the original article described different approaches to the efficient conversion of integers into strings. This time arround, I continue with the "Flexible C++" philosophy, and consider one last variation.
Flexible C++ #4: Efficient Integer To String Conversions: Part 4
Listing 1 – implementation of the int2str_proxy template class
template< typename C
, typename I
>
class int2str_proxy
{
public:
typedef C char_type;
typedef I int_type;
public:
int2str_proxy(int_type i)
: m_result(stlsoft::integer_to_string(m_sz, stlsoft_num_elements(m_sz), i))
{}
int2str_proxy(int2str_proxy const &rhs)
: m_result(m_sz)
{
char_type *dest = m_sz;
char_type const *src = rhs.m_result;
for(; 0 != (*dest++ = *src++);)
{}
}
operator char_type const *() const
{
return m_result;
}
private:
char_type const * const m_result;
char_type m_sz[21];
// Not to be implemented
private:
int2str_proxy &operator =(int2str_proxy const &rhs);
};
template< typename C
, typename I
>
inline int2str_proxy<C, I> int2str(I i)
{
return int2str_proxy<C, I>(i);
}
