I've been working on a tracing library, that works much like
clojure.contrib.trace (based on it, actually). One sticky problem
I've found is, hierarchical logs are really crappy to try to stream to
a file. You can't just keep writing to the end of the file - new data
needs to be inserted before existing end-tags. So what I'm doing is
storing the data as a list, until I know the data is complete, and
then i turn it back into a tree to write the file.
However I can't think of a simple way to do it, even though it seems
like a simple operation.
I want to turn this list of pairs (first item is the fn call or return
value, the second is a truthy value marking whether it's a call or
return)
'[[(+ 1 (- 5 2) nil]
[(- 5 2) nil]
[3 true]
[4 true]]
I want to turn that into
[(+ 1 (- 5 2))
[(- 5 2)
3]
4]
Is there a simple way to do this?
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