Support for ES2020 Optional chaining #2048
Merged
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This PR fixes #2023.
Several changes are made:
ChainExpression
,ChainElement
(optional
property forMemberExpression
andCallExpression
)?.
, which cannot follow a digit.?.
a?.'b'
with template string or indirecta?.b'c'
, here apostrophe is used as backtick)ChainExpression
is only inserted when in the chain there is optional chainingoptional: false
property forMemberExpression
andCallExpression
test/language/expressions/optional-chaining/call-expression-super-no-base.js
is whitelisted because of super() in non derived class #2000