hg: lambda/lambda/jdk: Add BufferedReader.lines

[Remi Forax]

On 11/12/2012 12:11 AM, Brian Goetz wrote:
>> Brian,
>> UncheckedIOException already exists, it's IOError.
>
> That exists, but is something different.
>
> IOError implements Error, which is intended to indicate an error 
> situation from which the VM cannot recover.  It was added to support 
> Console, for which using Error is arguably OK.  But here, an 
> IOException is clearly NOT an Error.
>
> Our choices where creating this class or wrapping it in an ordinary 
> RuntimeException.  Because we anticipated other cases with IO-backed 
> streams, we thought we'd get additional mileage out of this class.

by example, java.nio.file.Files.newDirectoryStream uses IOError exactly 
for that.

I agree that a runtime exception is better than an Error, but given that 
some classes of the JDK already uses IOError exactly for the same 
purpose, I don't think it's a good idea to have two classes for the very 
same thing.

Rémi