Re: GWT 2.8.0 forEach, Consumer, Function, Streams and other Java 8 stuff

You can compile java even 1.2 source code with JDK 1.8, so what is the problem with compiling Java 7 source with GWT for Java 8 emulation? Interfaces also should not be broken because of default methods in interfaces (that can just be ignored in sourceLevel < 8). Can you give example that describes the problem, please?

It is impossible to emulate certain Java 8 APIs without using Java 8 syntax (e.g. default methods on Collection interface). But if you launch GWT with -sourceLevel 1.7 then all Java 8 syntax is invalid and the emulated code that require Java 8 syntax will not compile.

That means we either 

- do not support Java 8 APIs in GWT 2.8 because we still want to support -sourceLevel 1.7, or

- GWT 2.8 will be Java 8 only and if you want to use it with -sourceLevel 1.7 you have to replace all emulated JRE code with the one of GWT 2.7 yourself

-- J.

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