LuaLS / LuaLS/lua-language-server
Generics in nested functions don't work for some annotations unless there are no arguments passed
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Descripción
### 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
### Expected Behaviour
passing an argument should have no effect, and the types of nested functions should be resolved correctly
some examples:
```lua
---@generic T
---@param arg T
---@return fun(): fun(): T
local function POOL1(arg) return function() return function() return arg end end end -- implementing the function makes no difference for the typing
local func1 = POOL1(5.2) -- type is `fun(): fun(): number`
local func2 = func1(4) -- type should be `fun(): number`, instead it's `fun(): ` with an unresolved generic
```
```lua
---@class POOL2: { EnumerateActive: fun():(T, fun():T)) }
---@type POOL2
local headerPool = {}
local number, func = headerPool:EnumerateActive()
-- number type is `number`
-- func type should be `fun(): number`, instead it's `fun(): ` with an unresolved generic
```
```lua
---@alias POOL3 fun(arg: number): T, (fun():T)
---@type POOL3
local getPool
local number, func = getPool(3)
-- number type is `number`
-- func type should be `fun(): number`, instead it's `fun(): ` with an unresolved generic
```
all 3 examples work fine if you don't pass any argument
### Actual Behaviour
when an argument is passed to the outer function, the inner function doesn't have the generic resolved

if no arguments are passed (i.e. `headerPool.EnumerateActive()`), then they _are_ resolved properly
the type of the argument makes no difference, and annotating the function as accepting an argument also makes no difference
interestingly, when hovering over the function itself, the tooltip does show the correctly resolved types

### Reproduction steps
copy the provided snippets, and check which types the variables resolve to
### Additional Notes
Tested on both VSCode and Jetbrains IDEs
The example is contrived, my real usecase is to annotate an object pool class, that allows you to acquire objects of a given (generic) type, and allows iterating over them.
I know this has worked in a past version, though I don't remember how long ago that was (several weeks or months most likely)
### Log File
_No response_
Guía de contribución
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Línea de trabajo
Comienza reproduciendo los tres ejemplos de anotaciones de Lua proporcionados e inspecciona cómo se resuelven los tipos genéricos anidados cuando la función externa recibe un argumento. Compara los tipos inferidos con los casos sin argumentos y con los resultados de hover esperados. Se considera completado cuando los tres ejemplos resuelvan sus funciones internas al tipo concreto, como number, manteniendo el comportamiento correcto existente.
Escrito por el modelo de indexación a partir del texto del issue.
Evaluación
- Stack tecnológico
- lua
- Área
- devtools
- Tipo de issue
- Error
- Dificultad
- 4/5
- Tiempo estimado
- 3-5 días
- Estado de actividad
- Estancado
- Claridad
- Bien especificado
- Aptitud para principiantes
- 48/100