(x) => {foo: bar}

[Allen Wirfs-Brock]

On Jan 6, 2015, at 5:34 PM, Gary Guo wrote:

> I found that even without shorthand, the object literal can still be ambiguous with block.

Yes, but not in the context of a ConciseBody of an ArrowFunction.

The grammar for ConciseBody (http://people.mozilla.org/~jorendorff/es6-draft.html#sec-arrow-function-definitions ) ensures that there is no ambiguity. If a ConciseBody starts with a { then it must parse as either a well-formed bracketed FunctionBody or as a syntax error.

There is no guessing. { means statements follow rather than an expression.

allen 
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