Inline... On Thu, Mar 19, 2015 at 4:50 PM Jan-Ivar Bruaroey <[email protected]> wrote:
> Hi group! First post, so be gentle. > Welcome > > I love how arrow functions allow single arguments to be passed without > parenthesis, so I expected this to work: > > Promise.all([true, false]).then([foo, bar] => console.log(foo +”, > "+ bar)); > > but it doesn't: > > SyntaxError: invalid arrow-function arguments (parentheses around > the arrow-function may help) > > I understand from the spec that this is as defined, but is there a > technical reason to disallow it? > To prevent ambiguity with: MemberExpression Arguments CallExpression Arguments Arguments[Yield] : ( ) ( ArgumentList[?Yield] ) ArgumentList[Yield] : AssignmentExpression[In, ?Yield] ... AssignmentExpression[In, ?Yield] ArgumentList[?Yield] , AssignmentExpression[In, ?Yield] ArgumentList[?Yield] , ... AssignmentExpression[In, ?Yield] e.g. fn([a, b]) Rick > The parenthesis seem redundant to the naked eye. > > Thanks, > > .: Jan-Ivar :. > > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss >
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