On Sat, Jul 25, 2009 at 09:45:18PM -0400, Isaac Dupree wrote:
> Ian Lynagh wrote:
>> Hi all,
>>
>> I've made a ticket and proposal page for making the labelled field
>> syntax stricter, e.g. making this illegal:
>>
>> data A = A {x :: Int}
>>
>> y :: Maybe A
>> y = Just A {x = 5}
>>
>> and requiring this instead:
>>
>> data A = A {x :: Int}
>>
>> y :: Maybe A
>> y = Just (A {x = 5})
>
> and, as currently, "(f some expression) {x=5}" still requires those
> parentheses also? Although depending on the surroundings, after this
> proposal, it might need to become "((f some expression) {x=5})"
Yes, exactly. I've added this to the wiki page:
No additional programs are accepted by this change, and no programs
have their behaviour changed. This change only rejects some programs
that were previously accepted.
Thanks
Ian
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