Add parser transform API #485
Merged
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Changes
Satisfies #399 by adding a way to preprocess tokens. Calling it “transform” because it mirrors a lot of standard AST visitor patterns.
Docs were added describing usage + examples. Testing it in another context, so may make incremental updates to it over time.
Other noise in this PR was just some unrelated housekeeping that bugged me. I tend to do it as a procrastination task (which happened no fewer than 4 times during this PR when I got stuck on something).
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