Re: passing vector as argument

"Ron Francis" wrote:


Actually you can say it about any data structure. Having a variable
`data', for instance, is no different from `MyVector' typedef. However,
usually this is not the case. The following code

class CustomerInfo { ... };

typedef std::vector<CustomerInfo> CustomerInfoVec;

void UpdateCustomerXYZ(CustomerInfoVec& civ)
{
   for(CustomerInfoVec::iterator it = civ.begin();
       it != civ.end();
       ++it)
   {
       CustomerInfo& ci = *it;
       ...
   }
}

is much easier to read comparing to this one:

void UpdateCustomerXYZ(std::vector<CustomerInfo>& civ)
{
   for(std::vector<CustomerInfo>::iterator it = civ.begin();
       it != civ.end();
       ++it)
   {
       CustomerInfo& ci = *it;
       ...
   }
}

In the case of `std::map' the typedef version is even more eloquent:

typdef std::map<CustomerID, CustomerInfo> CustomerInfoMap;

CustomerInfoMap::value_type v = ...

Alex