LuaLS / LuaLS/lua-language-server
Class generics cannot inherit directly from the generic
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- Dominant language
- Lua
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Description
How are you using the lua-language-server?
Visual Studio Code Extension (sumneko.lua)
Which OS are you using?
Windows
What is the issue affecting?
Annotations, Type Checking
Expected Behaviour
When defining a generic class, the class should be able to inherit directly from the generic, allowing an extension of the generic
---@class Example<T>: T
---@field thing boolean
Actual Behaviour
Lua diagnostics reports "undefined class `T`"
Reproduction steps
Copy the following into VSCode
---@class Example<T>: T
Hover over the second T
Additional Notes
No response
Log File
No response
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
Reproduce the issue in the Visual Studio Code extension using the provided generic-class annotation, then trace how class annotations and generic type parameters are resolved. Verify the fix by confirming that the second T is recognized as the inherited generic type and no undefined-class diagnostic appears.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- lua
- Domain
- tooling
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100