Accept a new-generic type parameter as a keyed-table key

[Frotty]

The keyed-table key was typed int, which forced every caller through castTo int — exactly the cost the old <T> containers pay and the reason a native Lua key was impossible: an integer index cannot be hashed as the element. This accepts a new-generic T: type parameter as the key instead. New generics are erased on Lua rather than cast, so the element arrives as itself and becomes the table key directly.

Emitted Lua for a unit key, with no cast and no __wurst_classFromIndex round trip:

u = __wurst_safe_CreateUnit(Player(0), 1751543663, 0., 0., 0.)
__wurst_keyedTableAdd(t, u)
if __wurst_keyedTableContains(t, u) then ...

function __wurst_keyedTableAdd(t, k)       t[k] = true        end
function __wurst_keyedTableContains(t, k)  return t[k] ~= nil end

int keys stay accepted, so nothing that already compiled changes.

Checks: 247 targeted tests across the Lua backend classes, 0 failures.

Known gap: membership is still a call to the stub rather than an index inlined at the call site — the deferred finding from #1302, unchanged here.

[Frotty]

@codex review

[chatgpt-codex-connector]

Codex Review Summary

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-10T15:07:11.188970Z	1023b61	Manual request

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[chatgpt-codex-connector]

💡 Codex Review

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Reviewed commit: 37a46b33cf

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[Frotty]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Keep them coming!

Reviewed commit: 1023b61500

ℹ️ About Codex in GitHub

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• Comment "@codex review".

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Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".