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This PR depends on #204.
The draft extends from the
ChainingExpression
approach proposed by the ESLint team. I choose this approach as it is more accessible the the other. I will work the other if we decide to use theOptionalCallExpression
approach.Since
a~.b()
and(a~.b)()
have different semantics, we addeventual: boolean
toChain
instead of(Member|Call)Expression
. I think this PR can offer perspective on how our decision on #204 will affect other proposal designs.Note that although the examples contain
?~.
, it should be considered as an experiment of an indeed experimental proposal which has not supported optional chaining yet. Although the optional chaining support can be expected in the near future, I have added a clause thateventual
andoptional
cannot be both true to align to current proposal.