[boost] binary operator raits

Subject: [boost] binary operator raits
From: frederic.bron_at_[hidden]
Date: 2008-09-05 11:31:09

I have just commited new traits in the sandbox (sandbox/type_traits) to know if a type is comparable or not. I have included tests but could not make bjam and quickbook run together so I have no
documentation to commit.
The names of the traits are based on standard header <functional>: is_less_comparable<T>, is_less_equal_comparable<T>, is_greater_comparable<T>, is_greater_equal_comparable<T>, is_
equal_to_comparable<T> and is_not_equal_to_comparable<T>.

Some comments about these traits:
- I was not able to remove the warnings,
- the traits inherits from true_type is the operator exists, however, I am not sure if we should return true if the binary operator does not return a type convertible to bool

F. Bron

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