Generic lambdas

[Brian Goetz]

Yes, Maurizio posted a list of gaps between the compiler binaries and the spec, this was one of them.

On Nov 16, 2011, at 6:59 PM, Miles Sabin wrote:

> I've just been attempting to play with generic lambdas using the
> binary JDK 8 snapshot posted a few days ago,
> 
> miles at lewis:lambda$ /usr/java/lambda-jdk/bin/java -version
> openjdk version "1.8.0-ea"
> OpenJDK Runtime Environment (build 1.8.0-ea-b1314)
> OpenJDK 64-Bit Server VM (build 23.0-b04, mixed mode)
> 
> I took this example from the EDR,
> 
> public class Lambda {
>  public static interface Picker {
>    <T> T pick(T first, T second);
>  }
> 
>  public static void main(String[] args) {
>    Picker rand = <T> (T first, T second) -> new
> Random().nextBoolean() ? first : second ;
>    int i = rand.pick(1, 2);
>    String s = rand.pick("a", "b");
>  }
> }
> 
> But this fails compilation as follows,
> 
> miles at lewis:lambda$ /usr/java/lambda-jdk/bin/javac Lambda.java
> Lambda.java:7: error: illegal start of expression
>    Picker rand = <T> (T first, T second) -> new
> Random().nextBoolean() ? first : second ;
> 
>                  ^
> 1 error
> 
> Is this expected at present?
> 
> Cheers,
> 
> 
> Miles
> 
> -- 
> Miles Sabin
> tel: +44 7813 944 528
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>