gradle-retrolambda
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evant
lombok.val within lambda breaks the build
I have a local value status in my method that relies on type that will be inferred from the initializer expression (lombok's val):
private MyCallBack<Result> foo(final Bar bar) {
return new MyCallBack<Result>() { // <----------------------- anonymous class
@Override public void apply(final Result result) {
val status = result.getStatus(); // <----------------------- OK
switch (status) {
case Result.SUCCESS:
...
}
}
This code compiles and runs good, but when I replace this with lambda:
private MyCallBack<Result> foo(final Bar bar) {
return result -> { // <----------------------- lambda
val status = result.getStatus(); // <----------------------- ERROR
switch (status) {
case Result.SUCCESS:
...
}
}
it even doesn't compile at all. Console output:
:app:compileDebugJavaWithJavac
/path/to/my/activity/MainActivity.java:187: error: incompatible types: int cannot be converted to val
val status = result.getStatus();
^
/path/to/my/activity/MainActivity.java:190: error: incompatible types: val cannot be converted to int
switch (status) {
^
If I replace val with int, it works again.
We have the same issue here. Eclipse can compile it but maven can't:
LombokValTest.java:[31,36] incompatible types: java.lang.String cannot be converted to lombok.val
public class LombokValTest {
public static void main(String[] args) {
new LombokValTest().test();
}
public void test() {
val data = new ArrayList<>(); // works
data.add("test1");
data.add("test2");
data.forEach(input -> {
val newValue = "VAL: " + input; // doesn't work (line 31)
System.out.println(newValue);
});
}
}
Using lombok 1.16.6:
mvn dependency:tree -Dverbose |grep lombok
[INFO] +- org.projectlombok:lombok:jar:1.16.6:provided
This doesn't happen always. Some of our projects are successfully building while others are not.
"org.projectlombok:lombok:1.16.6" Java 8
Lombok does not support lambdas. It seems the build is ordered in a way that Lombok is run before RetroLambda. I am trying to figure out how to change the order.
this also doesn't work (latest lombok + java 8): val amount = BigDecimal.valueOf(ingerValue).multiply(factor); // factor is BigDecimal
switched on vanilla java for now: final BigDecimal amount = BigDecimal.valueOf(ingerValue).multiply(factor);
Seems fixed with Lombok 1.16.12 and RetroLambda 3.4.0 (with Oracle Java 1.8.0_121). Can anyone else confirm?
I'm also having this issue using Lombok 1.16.16 and Java 1.8.0_131.
error: incompatible types: String cannot be converted to val
val decoded = new String(decodeBase64(token));
I'm not using RetroLambda. I have just a gradle project having compileOnly "org.projectlombok:lombok:1.16.16" in dependencies.
This is an issue for RetroLambda that it did not convert lambdas to methods before Lombok was run. For the issue in Lombok, you need to report it to them.