microsoft / microsoft/TypeScript
Flag for strict default function `this` types for call-site and assignability checking (`--strictThis`)
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Description
#6018 was originally going to add a --strictThis flag that made function this types default to void or the enclosing class (instead of any) for purposes of call-site and assignability checking, but that functionality was dropped (details). This is a follow-up suggestion for the dropped functionality, whatever the flag ends up being named.
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 reading issue #6018 and the linked comment describing why the original functionality was dropped. Clarify the intended strict this defaults, call-site and assignability behavior, and the eventual flag name before implementation; the issue does not identify files or tests, so completion criteria still need to be established.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- typescript
- Domain
- compilers
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100