Feb 28

When using expectation points, a parsing failure results in an exception that generically indicates the failure, but probably doesn’t explain the problem in the most meaningful way. It is possible to attach an error handler to react to the failed match in a more specialized way:

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Feb 26

Frank Dellaert was asking a valid question on the Spirit mailing list where he pointed out some things he was not able to understand. His question clearly uncovered an inconsistency in Spirit’s API. This lead us to implement some minor additional feature, which in the end turned out to make more uniform the way semantic actions are handled.

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Feb 12

Narinder Claire asked a seemingly innocent question on the Spirit mailing list the other day. After starting to write an answer I realized that this question is not innocent at all as it touches the very fabric of Spirit: the rules of attribute handling. Many people have a hard time to properly understand what is going on in the nether regions of Spirit. More importantly, they have a hard time to understand why is Spirit implemented the way it is.

The new article Attribute Propagation and Attribute Compatibility not only answers Narinders questions but tries to explain those important concepts in more detail.

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