RFE: Allow newline when returning an anonymous object

cowwoc cowwoc at bbs.darktech.org
Wed May 28 11:23:09 PDT 2014


Oliver Hunt-2 wrote
>> On May 28, 2014, at 11:10 AM, cowwoc <

> cowwoc at .darktech

> > wrote:
>> 
>> I would like the specification to also allow the following syntax: 
>> 
>> return 
>> { 
>>  key: "value" 
>> }; 
> 
> This is currently valid syntax, and has an entirely different behaviour
> (and side effects) from returning an object literal. This means that even
> if we wanted to we could not change that behaviour without potentially
> breaking existing content.
> 
> That said our reason for the required newline is that it provides a
> mechanism to disambiguate the grammar and semantics of object literal vs.
> block statements.
> 
> The following for instance has totally different behaviour depending on
> whether the new line is used:
> 
> if (foo)
>    return
> {
> L: print(something)
> }
> 
> The only way to disambiguate this in the general case is to have a rule
> such as 
> <no newline>
>  to allow us to be sure that the opening brace is in an expression context
> and not a statement.
> 
> --Oliver

Hi Oliver,

Excuse my ignorance, but can you explain (or point me to a layman
explanation) of the difference between the two forms?

Thanks,
Gili



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