From: Reece Dunn (msclrhd_at_[hidden])
Date: 2004-05-10 08:00:41
Is there a boost library that allows you to specify the range that a number
can take, e.g.
boost::range< int, 1, 12 > month;
generating an error on an invalid range, e.g.
month = 20; // [1] oops!
Also, is it possible to distinguish between a number literal like the above
and a variable assignment, like:
month = m; // [2]
The logic behind this is to provide compile-time checks where possible, so
[1] would produce a compile-time error and [2] would be a run-time error.
You could also do something like:
inline char & string::operator[]( boost::range< int, 5, 10 > i ){ ... }
// ...
string s;
s[ 1 ] = 'a'; // oops!
and
class date
{
boost::range< int, 1, 12 > month;
public:
inline date( boost::range< int, 1, 12 > m ): month( m ){}
};
Regards,
Reece
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