[processor/transform] Added nil to grammar #11150
Merged
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Description:
This PR adds
nil
to the grammar as a literal, in a reduced manner.nil
can be used as a literal but cannot be used as a replacement for maps and slices in function calls. The main goal is to allow nil checks in conditions, such as... where attributes["test"] == nil
Link to tracking Issue:
Closes #11087
Testing:
Updated unit tests
Documentation:
Updated README