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https://issues.apache.org/jira/browse/GROOVY-10925?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17685247#comment-17685247
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Paul King commented on GROOVY-10925:
------------------------------------
Yes, we have some inconsistent behavior. There has been debate in the past.
The semantics for properties with an initializer is to treat them like defaults
on the constructors.
{code:java}
@TupleConstructor
class C {
final one = 1
def two = 2
}
{code}
basically being equivalent to:
{code:java}
class C {
private final one
private two
C(one = 1, two = 2) {
this.one = one
this.two = two
}
def getOne() { one }
def getTwo() { two }
void setTwo(two) { this.two = two }
}
{code}
I think the same concept can be carried over to the map constructor but there
are some inconsistencies and issues with fields currently.
I'll have a further look shortly.
> @TupleConstructor namedVariant breaks on setting private final fields in
> constructor
> ------------------------------------------------------------------------------------
>
> Key: GROOVY-10925
> URL: https://issues.apache.org/jira/browse/GROOVY-10925
> Project: Groovy
> Issue Type: Bug
> Affects Versions: 4.0.8
> Reporter: Joe Li
> Priority: Major
>
> @TupleConstructor `namedVariant` Breaks in Groovy4 when setting values to
> private final fields in constructor
>
> Example code in Groovy4 that throws the `Unrecognized namedArgKey: x` error:
> {code:java}
> import groovy.transform.*
> @TupleConstructor(includeFields = true, namedVariant = true)
> @ToString(includeNames = true, includeFields = true)
> class Foo {
> private final int x = 1
> private int y = 2
> private final int z
> }
> println new Foo(x:3, y: 3, z: 3) {code}
>
>
> After removing the `namedVariant` and add the `@MapConstructor` the code
> works:
> {code:java}
> import groovy.transform.*
> @MapConstructor(includeFields = true)
> @TupleConstructor(includeFields = true)
> @ToString(includeNames = true, includeFields = true)
> class Foo {
> private final int x = 1
> private int y = 2
> private final int z
> }
> println new Foo(x:3, y: 3, z: 3) {code}
>
>
> Related issue:
> [GROOVY-10919|https://issues.apache.org/jira/browse/GROOVY-10919],
> @MapConstructor Breaks in Groovy4 when combined with @TupleConstructor, fine
> in Groovy3
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