Re: maximum continuation lines in C++

* Lynn McGuire, on 27.05.2010 21:44:


Just if you're dead seat agains declaring a simple static array for the data,
and also don't want to use Boost, then you can fudge it as follows to avoid both
the extremely repetitive code and any compiler limits on # of arguments:

<code>
#include <iostream>
#include <vector>

struct Strings
{
     std::vector< char const* > v;

     Strings& operator,( char const* s )
     {
         v.push_back( s );
         return *this;
     }
};

template< class Type >
struct Vector: std::vector< Type >
{
     Vector( Strings const& strings )
         : std::vector< Type >( strings.v.begin(), strings.v.end() )
     {}
};

int main( )
{
     using namespace std;

     Vector< std::string> productNames = (Strings(),
         "Metal Raschig Super-Ring 0.3 mm",
         "Metal Raschig Super-Ring 0.5 mm",
         "Metal Raschig Super-Ring 1 mm",
         "Metal Raschig Super-Ring 2 mm",
         "Metal Raschig Super-Ring 3 mm",
         "Metal Pall Ring 50 mm",
         "Metal Pall Ring 35 mm",
         "Metal Pall Ring 25 mm",
         "Metal Ralu Ring 50 mm",
         "Metal Ralu Ring 38 mm",
         "Metal Ralu Ring 25 mm",
         "Metal Hiflow-Ring 50 mm",
         "Metal Hiflow-Ring 25 mm",
         "Metal Hiflow-Ring 50 mm",
         "Metal Glitsch Ring 30 PMK",
         "Metal Glitsch Ring 30 P",
         "Metal Glitsch CMR Ring 1.5 in",
         "Metal Glitsch CMR Ring 1.5 in T",
         "Metal Glitsch CMR Ring 1.0 in",
         "Metal Glitsch CMR Ring 0.5 in",
         "Metal VSP Ring 50 mm",
         "Metal VSP Ring 25 mm",
         "Metal Bialecki Ring 50 mm",
         "Metal Bialecki Ring 35 mm",
         "Metal Bialecki Ring 25 mm",
         "Metal Bialecki Ring 35 mm",
         "Metal Ralu Pak YC-250",
         "Metal Mellapak 250Y",
         "Metal Gempack A2T-304",
         "Metal Impulse packing 250 mm",
         "Metal Montz Packing B1-200",
         "Metal Montz Packing B2-300",
         "Plastic Raschig Super-Ring 2 mm",
         "Plastic Ralu Flow 1 mm",
         "Plastic Ralu Flow 2 mm",
         "Plastic Pall Ring 50 mm",
         "Plastic Pall Ring 35 mm",
         "Plastic Pall Ring 25 mm",
         "Plastic Ralu Ring 50 mm",
         "Plastic Ralu Ring 38 mm",
         "Plastic Ralu Ring 25 mm",
         "Plastic NOR PAC Ring 50 mm",
         "Plastic NOR PAC Ring 35 mm",
         "Plastic NOR PAC Ring 25 mm",
         "Plastic NOR PAC Ring 25 mm",
         "Plastic Hiflow-Ring 50 mm hydrophobic",
         "Plastic Hiflow-Ring 50 mm S",
         "Plastic Hiflow-Ring 25 mm",
         "Plastic Envi Pac Ring 80 mm",
         "Plastic Envi Pac Ring 60 mm",
         "Plastic Envi Pac Ring 32 mm",
         "Plastic Tellerette 25 mm",
         "Plastic Hackette 45 mm",
         "Plastic Raflux Ring 15 mm",
         "Plastic DIN-PAK 70 mm",
         "Plastic DIN-PAK 47 mm",
         "Plastic Montz Packing C1-200",
         "Plastic Montz Packing C2-200",
         "Plastic Euroform PN-110",
         "Ceramic Hiflow-Ring 50 mm",
         "Ceramic Hiflow-Ring 38 mm",
         "Ceramic Hiflow-Ring 20 mm",
         "Ceramic Raschig Ring 50 mm",
         "Ceramic Raschig Ring 25 mm",
         "Ceramic Berl Saddle 25 mm",
         "Ceramic Berl Saddle 13 mm",
         "Ceramic Pall Ring 50 mm",
         "Ceramic Impulse Packing 100 mm",
         "Aluminum TOP Pak Ring 50 mm"
         );
    cout << productNames.size() << endl;
}
</code>

However, I recommend to not hardcode such data but rather read it from some file
or other configuration source. Or if you "must" hardcode, then use an array, like

    char const* const productNames[] = { "alfa", "beta", "gamma" };

You can always copy that over into a std::vector.

Cheers & hth.,

- Alf

--
blog at <url: http://alfps.wordpress.com>