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sunlan pushed a commit to branch GROOVY_3_0_X
in repository https://gitbox.apache.org/repos/asf/groovy.git
commit dce33a30eeb0aae6ffa3b232366eed6347682b0a
Author: Daniel Sun <sun...@apache.org>
AuthorDate: Wed Jan 15 14:59:08 2020 +0800
Add docs for Java-style non-static inner class instantiation
(cherry picked from commit 2533b24016893466df290cede7c2be8566913f79)
---
src/spec/doc/core-differences-java.adoc | 5 ++++-
src/spec/doc/core-object-orientation.adoc | 16 ++++++++++++++++
2 files changed, 20 insertions(+), 1 deletion(-)
diff --git a/src/spec/doc/core-differences-java.adoc
b/src/spec/doc/core-differences-java.adoc
index 1170704..d61c6f1 100644
--- a/src/spec/doc/core-differences-java.adoc
+++ b/src/spec/doc/core-differences-java.adoc
@@ -186,7 +186,7 @@ In Java you can do this:
include::{projectdir}/src/spec/test/DifferencesFromJavaTest.groovy[tags=innerclass_3_java,indent=0]
----------------------------------
-Groovy doesn't support the `y.new X()` syntax. Instead, you have to write `new
X(y)`, like in the code below:
+Before 3.0.0, Groovy doesn't support the `y.new X()` syntax. Instead, you have
to write `new X(y)`, like in the code below:
[source,groovy]
----------------------------------
@@ -201,6 +201,9 @@ There is a danger that you will write new X() instead of
new X(this) for
example. Since this might also be the regular way we have not yet found
a good way to prevent this problem.
+[NOTE]
+Groovy 3.0.0 supports Java style syntax for creating instances of non-static
inner classes.
+
== Lambda expressions and the method reference operator
Java 8+ supports lambda expressions and the method reference operator (`::`):
diff --git a/src/spec/doc/core-object-orientation.adoc
b/src/spec/doc/core-object-orientation.adoc
index 0ff7be4..a4a3657 100644
--- a/src/spec/doc/core-object-orientation.adoc
+++ b/src/spec/doc/core-object-orientation.adoc
@@ -144,6 +144,22 @@
include::{projectdir}/src/spec/test/ClassTest.groovy[tags=inner_class2,indent=0]
Note that the class `Inner2` is defined only to provide an implementation of
the method `run` to class `Outer2`. Anonymous inner classes help to eliminate
verbosity in this case.
+Since Groovy 3.0.0, Java syntax for non-static inner class instantiation is
now supported, for example:
+
+[source,groovy]
+--------------------------------------
+class Computer {
+ class Cpu {
+ int coreNumber
+
+ Cpu(int coreNumber) {
+ this.coreNumber = coreNumber
+ }
+ }
+}
+
+assert 4 == new Computer().new Cpu(4).coreNumber
+--------------------------------------
===== Anonymous inner class
