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30 lines
1.2 KiB
Markdown
30 lines
1.2 KiB
Markdown
# Parsing Javascript and Generating it Back
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## What Purpose?
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This would be really useful for refactoring tools. I also want
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automatic comments to be placed when certain features are used,
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such as the [Sequence](../../src/backend/src/codex/Sequence.js)
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class, since its usefulness won't be immediately apparent where
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it appears in the source code.
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I turns out the state of affairs with respect to generating a
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CST for javascript... [kind of sucks](https://github.com/benjamn/recast/issues/1412).
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I hope that further discussion on the issue I linked renders the
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previous statement ironic.
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## So, What Next?
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The options I see are:
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1. Add support to recast to make use of @babel/parser tokens when
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the `tokens: true` option is set.
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2. Add a format-preserving outputter to @babel/outputter.
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[this is being worked on](https://github.com/babel/rfcs/pull/15)
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3. Wait for someone else to do either of the previous two things.
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4. Write a CST parser for javascript.
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I'm going to start with option #3. It's very disappointing that
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I don't have time to do #4, because I don't very much like solutions
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#1 and #2; I like my CSTs to be more cohesive - a pyramid of meaning -
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rather than lexer output dumped at the end of an AST.
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