Re: [w3c/IndexedDB] Key Paths: Support iteration step operator (#35)

mediaformat left a comment (w3c/IndexedDB#35)

I see this was tagged, was there any discussion of this at TPAC2024?

> What are the associated edge cases if we allowed the proposed syntax: `"a.b[].c"` ? What does the grammar look like? Is `"a[][]"` valid? (yes?) Is `"[]"` valid? (yes?) Is `"a[]a"` valid? (no?)
> 
> ```
> path := "" | (identifier | iteration) step*
> step ::= "." identifier | iteration 
> iteration ::= "[]"
> identifier ::= IdentifierName /* [ECMA-262] */
> ```
> 
> Parsing then leads to a sequence of (identifier | iteration); https://w3c.github.io/IndexedDB/#dfn-evaluate-a-key-path-on-a-value would need to parse (not just split on "." then iterate), and if an iteration step is hit uses GetMethod(v, @[@iterator](https://github.com/iterator)) / GetIterator() like WebIDL and iterates/recurses, producing a key array.

Any editors want to bring this up at TPAC2026?





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