max-l/Squeryl — pull request #144 by rssh (2012-05-13 16:48:29+00:00)
Title:  added LogicalBoolean helper.

It would be good to have inside squeryl common operations on LogicalBoolean-s, which otherwise need to be written in any nontrivial project with squeryl:

Compose 'and' and 'or' statements from list of expressions.
generate true or false value.

So, I added object LogicalBoolean with expression node for constant-false and constant-true logical expressions.