> Le 3 juin 2015 à 11:08, Axel Rauschmayer <a...@rauschma.de> a écrit :
>
> https://people.mozilla.org/~jorendorff/es6-draft.html#sec-array.prototype.concat
>
> <https://people.mozilla.org/~jorendorff/es6-draft.html#sec-array.prototype.concat>
>
> I’m not seeing @@isConcatSpreadable being used as a property key anywhere in
> the spec.
>
> Thanks!
>
> Axel
>
Look at the IsConcatSpreadable abstract operation:
https://people.mozilla.org/~jorendorff/es6-draft.html#sec-isconcatspreadable
Note that, in absence of @@isConcatSpreadable property key, IsArray() is
considered instead,
so that builtin objects and constructors defined in the spec do not need to use
@@isConcatSpreadable in order to get the right semantics.
—Claude
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