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* add the casting node to the AST at build timeAaron Patterson2014-03-241-1/+1
| | | | | If we add the casting node to the ast at build time, then we can avoid doing the lookup at visit time.
* Add equality to ALL THE THINGS (that matter)Ernie Miller2012-08-181-0/+12
| | | | | | | | | | | | People are often trying to use ARel nodes inside ActiveRecord, and when they do so, lots of things can break, because ActiveRecord relies on Array#uniq and sometimes hash key equality to handle values that end up in wheres, havings, etc. By implementing equality for all the nodes, we should hopefully be able to prevent any nodes (even nodes containing other nodes) from failing an equality check they should otherwise pass, and alleviate many of these errors. Fixes #130
* Include Predications in GroupingErnie Miller2012-05-191-0/+13
Also, removed unused ordering.rb file, since it is identical to the one being created in unary.rb already, and isn't required anywhere.