Nullish assign operator ??=
#1705
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All cases are handled: ```js f?.() a.b?.() a[0]?.() a.__parent__() ``` Handled also `eval` (which has special opcodes)
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Rebased on top of master |
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Implements the nullish assign operator
??=.This PR is stacked on top of #1702. The only new commit is this: 005371f
Should close #936