Support for generic classes #734

Activity

1. sumneko

   added

   feat/LuaCats AnnotationsRelated to Lua Language Server Annotations (LuaCats)Related to Lua Language Server Annotations (LuaCats)

   enhancementNew feature or requestNew feature or request

   on Oct 15, 2021
2. carsakiller

   added

   feat/genericRelated to generic emulation featureRelated to generic emulation feature

   on Jul 28, 2022
3. carsakiller commented on Feb 20, 2023

   

   carsakiller

   on Feb 20, 2023

   Collaborator

   More actions

   Just some test cases:

   ---@class Array<T>: { [integer]: T }
   
   ---@type Array<string>
   local arr = {}
   
   -- correctly warns that I am assigning a boolean to a string
   arr[1] = false
   
   -- no warning despite indexing with a string instead of an integer
   arr["foo"] = "bar"
   
   -- correctly does not warn as I am following the type correctly
   arr[3] = "Correct"

   ---@class Dictionary<T>: { [string]: T }
   
   ---@type Dictionary<boolean>
   local dict = {}
   
   -- no warning despite indexing with a number
   dict[1] = "incorrect"
   
   -- no warning despite assigning a string
   dict["foo"] = "bar?"
   
   -- correctly does not warn as I am following the type correctly
   dict["correct"] = true

   👍React with 👍2Reacted by inklesspen_rus and June Gschwantner
4. GiuseppeIII commented on Jun 25, 2023

   

   GiuseppeIII

   on Jun 25, 2023

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   Ran into this today as well 😞.

   👍React with 👍5Reacted by Massimo "Mx" Cacciapaglia, Utkarsh Verma, trober, Venusta and KUDr66
5. b0o commented on Mar 31, 2024

   

   b0o

   on Mar 31, 2024

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   Any update on this? This feature would be amazing!
6. A1steaksa commented on Apr 20, 2024

   

   A1steaksa

   on Apr 20, 2024

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   This has cropped up as an issue that's making modularity difficult. Would love to see it fixed.
7. vaderkos commented on Aug 31, 2025

   

   vaderkos

   on Aug 31, 2025

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   Is there any fix for Undefined type or alias yet?

   

   Because it looks like it works correctly in type definitions:

   

   👍React with 👍2Reacted by Stefanos Grammenos and melinda chang
8. Sampleeeee commented on Oct 15, 2025

   

   Sampleeeee

   on Oct 15, 2025

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   I am also experiencing this issue on arch, using neovim with the mason lua-language-server language server.