Valid java 5 code refuses to compile with lambda-8-b81-linux-x64-12_mar_2013
Grégoire Neuville
gregoire.neuville at gmail.com
Wed Mar 27 16:39:01 PDT 2013
Ok, I've just tested with lambda-8-b83-linux-x64-25_mar_2013 and it works.
Thanks !
On 19 March 2013 18:21, Maurizio Cimadamore
<maurizio.cimadamore at oracle.com>wrote:
> I've fixed this in the latest tip.
>
> Maurizio
>
>
> On 16/03/13 23:17, Grégoire Neuville wrote:
>
>> Hello,
>>
>> First of all, let me thank and congratulate you for the hard work you're
>> putting into adding a functional tone to java : this is a great move that
>> will undoubtedly prove itself immensely beneficial.
>>
>> That being said, I'm having a hard time compiling some basic java 5 code
>> with the binary pre-release of both the bare jdk 1.8 and the
>> lambda-enriched one. Indeed, trying to compile the below code :
>>
>> <code>
>>
>> public class TestJ8 {
>>
>> interface Func<A, B> {
>> B f(A a);
>> }
>>
>> class List<A> {
>>
>> <B> List<B> map(Func<A, B> f) {
>> return null;
>> }
>>
>> <B> List<B> bind(Func<A, List<B>> f) {
>> return null;
>> }
>>
>> <B> List<B> apply(final List<Func<A, B>> lf) {
>> return lf.bind(this::map);
>> }
>>
>> <B, C> List<C> bind(final List<B> lb, final Func<A, Func<B, C>>
>> f) {
>> return lb.apply(map(f)); // fails to compile
>> }
>>
>> }
>>
>> }
>>
>> </code>
>>
>> fails with the given message : error: method apply in class
>> TestJ8.List<A>
>> cannot be applied to given types
>>
>> Is it expected behaviour or am I missing something (installation steps or
>> whatever...) ?
>>
>> Note : The compiler is invoked through maven with the following
>> configuration :
>>
>> <plugin>
>> <groupId>org.apache.maven.**plugins</groupId>
>> <artifactId>maven-compiler-**plugin</artifactId>
>> <version>3.0</version>
>> <configuration>
>> <verbose>true</verbose>
>> <fork>true</fork>
>> <executable>/usr/lib/jvm/**java8/bin/javac</executable>
>> <compilerArgument>-g</**compilerArgument>
>> <compilerVersion>1.8</**compilerVersion>
>> <source>1.8</source>
>> <target>1.8</target>
>> </configuration>
>> </plugin>
>>
>> Thanks !
>>
>>
>
--
Grégoire Neuville
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