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Posted to notifications@groovy.apache.org by "Howard (Jira)" <ji...@apache.org> on 2020/10/16 17:26:00 UTC
[jira] [Created] (GROOVY-9781) Groovy 3 doesn't call implicit
constructor properly for inner classes
Howard created GROOVY-9781:
------------------------------
Summary: Groovy 3 doesn't call implicit constructor properly for inner classes
Key: GROOVY-9781
URL: https://issues.apache.org/jira/browse/GROOVY-9781
Project: Groovy
Issue Type: Bug
Reporter: Howard
Groovy 2 automatically calls the implicit constructor when the function definition requires returning a different class. Example
{code}
class B{
class A {
List a;
}
A func2() {
return ['a': []]
}
}
def b = new B().func2()
b
{code}
Fun2 automatically calls an implicit constructor for A using the map. The same code does not run on groovy 3 resulting in the following error msg
{code}
org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot cast object '{a=[]}' with class 'java.util.LinkedHashMap' to class 'B$A' due to: groovy.lang.GroovyRuntimeException: Could not find named-arg compatible constructor. Expecting one of:
B$A(Map)
B$A()
at B.func2(ConsoleScript8:7)
at B$func2.call(Unknown Source)
at ConsoleScript8.run(ConsoleScript8:10)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
{code}
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