Normative: add Iterator.concat #3713
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The rendered spec for this PR is available at https://tc39.es/ecma262/pr/3713. |
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| 1. Let _method_ be ? GetMethod(_item_, %Symbol.iterator%). | ||
| 1. If _method_ is *undefined*, throw a *TypeError* exception. |
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perhaps these two steps, which are repeated in GetIterator, could be abstracted to a reused AO?
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This implements the Stage 3 Iterator Sequencing proposal. Based on #3712.