rust-lang / rust-lang/rust-bindgen
Provide way to request layout test for type replacement
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- Rust
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Description
In Gecko we use mapped-generic-types to swap certain types with another.
It would be nice if we could also request a layout test to be written for these types. Basically, the ability to say "Replace instances of type X with Y, but also generate a test checking that Y is the same size as X should be"
cc @emilio
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 locating the implementation of mapped-generic-types and the code that generates layout tests. Determine how a type replacement could request a generated size comparison test, then verify that the requested replacement produces a test checking that the replacement type matches the original type's size.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust
- Domain
- tooling
- Issue type
- Feature
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100