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Array type matches any table #3101

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rnwst opened this issue Feb 28, 2025 · 0 comments
Open

Array type matches any table #3101

rnwst opened this issue Feb 28, 2025 · 0 comments

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@rnwst
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rnwst commented Feb 28, 2025

How are you using the lua-language-server?

Other

Which OS are you using?

Linux

What is the issue affecting?

Type Checking

Expected Behaviour

When assigning a class/key-value table to a type defined as an array, a diagnostics error should be raised.

Actual Behaviour

No diagnostics error is raised.

Reproduction steps

local dict = {a = 'a'}

---@type number[]
local array = dict

Observe that no diagnostics error is raised when assigning dict to array, which is defined as an array.

Additional Notes

lua-langauge-server should check for the presence of non-integer indices in a table. If there are any, the table should not match the array type.

I believe the present issue is the underlying issue in #1721.

Version

3.13.6-1

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