Updating JDK libraries to use Project Coin features
joe.darcy at oracle.com
Thu Dec 16 09:01:45 PST 2010
On 12/16/2010 8:57 AM, Neil Richards wrote:
> On 15 December 2010 01:34, Joe Darcy<joe.darcy at oracle.com> wrote:
>> The JDK 7 build has been using -source 7 for some time, but to date use of
>> new language features has been informal and incidental. Supporting Project
>> Coin and JSR 334, Stuart Marks will be leading a "minting" exercise over the
>> JDK code base to systematically update the JDK libraries to take advantage
>> of the Project Coin language features. Efforts will be focused on the src
>> and test portions of the jdk repository of the JDK 7 forest.  The first
>> features to be rolled into the code will be diamond and strings in switch.
> It would be really great if the compiler code remains able to be built
> using a Java 6 bootstrap.
> (So that everyone's build environment doesn't become reliant on
> pre-FCS quality code).
Yes, we plan to keep at least the javac portions of the langtools
repository buildable with JDK 6 for just such bootstrapping reasons.
For some time, we've had the constraint that javac in JDK (N+1) is
buildable with JDK N, which precludes use of new language features and
direct use of new libraries (reflection can be used for dynamic lookups
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