Unintuitive here document behavior: bug or feature?

[Jim Laskey (Oracle)]

Revising the document is in the works.

Cheers,

-- Jim


On Feb 23, 2015, at 2:50 PM, Anthony Vanelverdinghe <anthony.vanelverdinghe at gmail.com> wrote:

> Hi
> 
> I see the bug has been resolved as not an issue. However, in my opinion this behavior is sufficiently unintuitive that it should at least be documented:
> - as far as I know, appending commands after the starting "<<EOD" is not possible in a bash script (already the fact that in Nashorn the "<<EOD" is actually embedded in the statement, as in "print(<<EOD);", is pretty unique, I believe)
> - moreover, users that are unaware of this behavior, may start writing text on the same line & will get errors at runtime. For example:
> 
> print(<<EOD); This is line 1.
> And this is line 2.
> EOD
> 
> results in:
> 
> test.js:3:-33 Expected ; but found is
> print(<<EOD); This is line 1.
> ^
> 
> and:
> 
> print(<<EOD); This
> And this is line 2.
> EOD
> 
> results in:
> 
> And this is line 2.
> test.js:3 ReferenceError: "This" is not defined
> 
> (also note that the error refers to line 3 in both cases, even though line 3 just contains the closing delimiter)
> 
> So in conclusion, I would like to ask for this bug to be reopened, with the goal to specify this behavior in the appropriate section of the Nashorn user guide [1]. Thanks in advance for your consideration.
> 
> Kind regards, Anthony
> 
> [1] http://docs.oracle.com/javase/8/docs/technotes/guides/scripting/nashorn/shell.html#sthref26
> 
> 
> On 23/02/2015 4:46, A. Sundararajan wrote:
>> Hi,
>> 
>> It appears to be a bug to me. Thanks for reporting. I filed https://bugs.openjdk.java.net/browse/JDK-8073612
>> 
>> Thanks,
>> -Sundar
>> 
>> On Sunday 22 February 2015 04:42 PM, Anthony Vanelverdinghe wrote:
>>> Hi
>>> 
>>> When using a here document, statements that are on the same line as the initial <<EOD are interpreted as JavaScript & executed after the "heredoc statement". Is this a bug or a feature?
>>> 
>>> For example:
>>> 
>>> var a = 2;
>>> print(<<EOD); a = 3; print("here")
>>> a++;
>>> ${a}
>>> EOD
>>> print(a);
>>> 
>>> prints
>>> 
>>> a++;
>>> 2
>>> here
>>> 3
>>> 
>>> Kind regards, Anthony
>> 
>> 
>