Autocomplete - Prevent TableState:Free properties with no writeTy to show up when requesting properties from an AST Index #1392
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#1309
#1389
There is a Unit Test, I hope it explains it.
Now the thing is,
writeTyis nullopt only in the New Type Solver.When a property is only read from in the old type solver for some reason it also gets a
writeTyassigned, hence why this fix only works for the new type solver 🤷And when a property is written to
writeTyis empty in the old solver no clue how.I do know that this fix doesn't work if the FreeType is getting intersected with anything else, but... you'd loop through the intersection type I guess.
I didn't fix it because I ran into a bug that wasn't caused by this change. Which can be found here: #1391
Summary
If you have a TableType with
TableState:Freedoing an autocomplete is actually going to fill up the propeties that were never written to, into the entryMap as well.And this should prevent that from happening. This shouldn't ruin function table based autocompletes.
The purpose of Free Table types is to have unsealed tables work anywhere. You can't actually create a Free Table type with Luau syntax I think. At least yet.