Parses invalid parenthesized pattern (for statement)
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- TypeScript
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Description
Parses invalid parenthesized pattern (for statement)
Steps to reproduce
esprima.parse('for(({a}) in 0);)
esprima.parse('for(({a}) of 0);')
esprima.parse(for(([a]) of 0);)
esprima.parse('for(([a]) in 0);')
Expected output
Should throw an syntax error
Actual output
Parses AST tree
Relevant references
Both Acorn, Shift and Cherow throws as expected.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by running the four reproduction snippets through esprima.parse and trace how parenthesized patterns are handled in for statements. Add regression coverage for these cases and verify that each invalid form throws a syntax error instead of producing an AST.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- javascript, typescript
- Domain
- compilers
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100