ES2016 bind syntax does not work with functions
babel-bot opened this issue · comments
Original issue submitted by @julien-f in babel/babel#2988
const getConsole = () => console
const log = ::getConsole().log // Binding should be performed on object property
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We should verify if this is actually against the spec. The spec has
BindExpression[Yield] :
LeftHandSideExpression[?Yield] :: [lookahead ≠ new] MemberExpression[?Yield]
:: MemberExpression[?Yield]
and MemberExpression from the grammar side of things (rather than the AST side), does not include reading a property off the result of a call.
@loganfsmyth, I think you're right about your reading of the spec, but that's plausibly a bug in the grammar in the proposal - it's easy to forget that CallExpression has its own production for property access which also needs to be thought about any time you work with property access. (We ran into this in the private fields proposal, e.g.)
Totally.
This issue has been moved to babel/babel#6674.