Great discussion! Thanks folks.
Also, I didn't know that tuples and struct are interchangeable.
Graham
On 7/26/07, Jeff Flinn
Graham Reitz wrote:
Ok good. So it sounds like my concern isn't justified.
To be certain. Because of tuples I prefer this:
typedef boost::tuples::tuple
some_pair; typedef std::vector some_pairs; to this: struct some_pair { unsigned int i; double d; }; typedef std::vector
some_pairs; Is tuples meant to be used like the first example?
I use tuples or fusion containers when the names of the data members have no meaning, and you want to iterate over the members in some way. Your example, with it's members i and d, obviously falls into this category. ;)
I've also used tie to get the best of both worlds:
class tire_size { int width; int aspect_ratio; string speed_rating; int wheel_diameter; public:
...
bool operator<( const tire_size& rhs )const { return tie( width , aspect_ratio , speed_rating , wheel_diameter ) < tie( rhs.width, , rhs.aspect_ratio , rhs.speed_rating , rhs.wheel_diameter ); } };
int main() { tire_size summer911turbo(295,30,"Z",18); tire_size winter911rurbo(265,35,"H",18);
bool b = winter911turbo < summer911turbo;
return 0; };
Jeff Flinn
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