[boost] Collection concept

From: jsiek_at_[hidden]
Date: 2000-01-10 19:21:18

There's one controvertial part in deciding what should go into the
requirements for the Collection concept. The reference type
requirements:

1) a real C++ reference (too restrictive)

2) any type, but if it is not a real reference the type should also be the
value type, so member access is still OK.

3) any type including proxies to the value type, now
  member access is *not* OK

e.g.,

i = c.begin();
(*i).foo(); // good or bad depending on 2 or 3

Many of the candidate types that model Collection (array, array_ptr,
many MTL and GGCL objects) would be OK with option 2). To have
vector<bool> fit one would have to go with option 3).

Thoughts, suggestions?

Cheers,

Jeremy