Documentation of Project Coin features as implemented in the JDK 7 developer preview

[Maurizio Cimadamore]

On 09/03/11 13:49, Eamonn McManus wrote:
>> So it is more a compiler bug erroneously accepting spaces 'inside' the
>> diamond. The compiler should be fixed.
> I don't understand this. We're not introducing a new lexical <> token, 
> are we? So obviously the compiler must allow spaces between < and >, 
> as between any pair of tokens. Stylistically, some people might prefer 
> to write List < Integer >, say, and would certainly be surprised not 
> to be able to write List < >.
I think it would be better if the compiler would be stricter about this, 
and to deal with diamond as if it were a token - otherwise, programmer 
might abuse of current behavior:

new ArrayList< >();

new ArrayList<
 >();

Which is ugly.

Maurizio
> Éamonn
>
> On 9/3/11 2:25 PM, Maurizio Cimadamore wrote:
>> On 09/03/11 12:57, Ulf Zibis wrote:
>>> Why do you allow whitespace between the "<" and">" of a diamond.
>> Good catch - I don't think this is a spec problem, as the grammar for
>> diamond is defined as follows in the latest draft:
>>
>> /TypeArgumentsOrDiamond:/
>>
>>          /TypeArguments/
>>
>>          |<||>|
>>
>>
>> So it is more a compiler bug erroneously accepting spaces 'inside' the
>> diamond. The compiler should be fixed.
>>
>> Maurizio
>>> Is whitespace allowed for ++ operator e.g.?
>>>
>>> -Ulf
>>>
>>>
>>> Am 09.03.2011 07:40, schrieb Joe Darcy:
>>>> Joe Darcy wrote:
>>>>> Hello.
>>>>>
>>>>> I've posted documentation of the semantics of the Project Coin
>>>>> features as implemented in the JDK 7 developer preview,  b130, at:
>>>>> http://cr.openjdk.java.net/~darcy/ProjectCoin/ProjectCoin-Documentation-v0.83.html
>>>>>
>>>>>
>>>>> Before sending in comments or questions about a feature to coin-dev,
>>>>> please read the discussion section after a feature.  Many design
>>>>> considerations are discussed in those sections.  Additionally, some
>>>>> known bugs in the current implementation are noted in the text.  In
>>>>> particular, javac in the JDK 7 developer preview erroneously accepts
>>>>> diamond combined with non-generic classes and accepts some uses of
>>>>> diamond with anonymous inner classes. These bugs will be corrected in
>>>>> future builds.
>>>>>
>>>>> Happy reading,
>>>>>
>>>>> -Joe
>>>> No comments from the coin-dev readership on the posted documentation?
>>>>
>>>> -Joe
>>>>
>>>>