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https://issues.apache.org/jira/browse/GROOVY-10261?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Paul King closed GROOVY-10261.
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> @NamedVariant: Default parameters on ctor/method are ignored when passing
> some named parameters
> -----------------------------------------------------------------------------------------------
>
> Key: GROOVY-10261
> URL: https://issues.apache.org/jira/browse/GROOVY-10261
> Project: Groovy
> Issue Type: Bug
> Components: Compiler
> Affects Versions: 3.0.9
> Environment: IntelliJ 2021.1.1 x64
> AdoptOpenJDK-11.0.11+9
> WIN 10
> Reporter: mgroovy
> Assignee: Paul King
> Priority: Major
> Fix For: 4.0.0-beta-2, 3.0.10
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> * When using named paramters on an @NamedVariant annotated ctor or method,
> default values for parameters not passed are ignored and the parameters are
> set to null instead
> * This does not occur when no paramaters are passed, or (trivially) if all
> named parameters are passed
> * Default parameters are a powerful feature of Groovy, not having them
> supported requires one to
> ## Treat parameters who cannot have null as an allowed value who are passed
> as null as having the default value (leading to a lot of clutter / boiler
> plate code)
> ## Parameters for which null is a valid value, special-meaning e.g. EMPTY
> instances have to be implemented and given as the default parameter value, to
> be mapped to the actual value as with the null values above, which evidently
> is even more cumbersome & inelegant
> * Sample code
> ** Note: assertEquals is used since at least in IntelliJ it supplies a link
> to the integrated text diff viewer, allowing to conevniently compare the
> expected and actual results:
> {code}
> import groovy.transform.NamedVariant
> import org.junit.Test
> import simple.groovy.helper.Foo
> import simple.groovy.helper.NamedVariantTestClass
> import static org.junit.Assert.assertEquals
> //@CompileStatic // compile-static or not does not matter
> class NamedVariantTest2 {
> @Test void namedVariantCtorBug_DefaultArgumentsAreIgnored() {
> final resultList = [
> new NamedVariantTestClass(),
> new NamedVariantTestClass(text:"cba"),
> new NamedVariantTestClass(text:"cba", foo:new Foo(8765,'Oof')),
> new NamedVariantTestClass(text:"cba", foo:new Foo(8765,'Oof'),
> number:4321),
> //new NamedVariantTestClass("cba", foo:new Foo(321,'foot'),
> number:7777)
> ]
> // Fails: all non-given ctor arguments are incorrectly set to null
> instead of being given their default value, unless all or no arguments are
> passed.
> assertEquals resultList.join('\n'),
> """
> NVTC(number=1234, text=abc, foo=Foo(5678,'Foo'))
> NVTC(number=1234, text=cba, foo=Foo(8765,'Oof'))
> NVTC(number=1234, text=cba, foo=Foo(8765,'Oof'))
> NVTC(number=4321, text=cba, foo=Foo(8765,'Oof'))
> """.trim()
> }
> @Test void namedVariantMethodBug_DefaultArgumentsAreIgnored() {
> final resultList = [
> namedVariantTestMethod(),
> namedVariantTestMethod(text:"cba"),
> namedVariantTestMethod(text:"cba", foo:new Foo(8765,'Oof')),
> namedVariantTestMethod(text:"cba", foo:new Foo(8765,'Oof'),
> number:4321)
> ]
> resultList.each { println it }
> // Fails: all non-given method arguments are incorrectly set to null
> instead of being given their default value, unless all or no arguments are
> passed.
> assertEquals resultList.join('\n'),
> """
> nvtm(number=1234, text=abc, foo=Foo(5678,'Foo'))
> nvtm(number=1234, text=cba, foo=Foo(8765,'Oof'))
> nvtm(number=1234, text=cba, foo=Foo(8765,'Oof'))
> nvtm(number=4321, text=cba, foo=Foo(8765,'Oof'))
> """.trim()
> }
> @NamedVariant String namedVariantTestMethod(Integer number = 1234, String
> text = "abc", Foo foo = new Foo(5678, 'Foo')) {
> "nvtm(number=$number, text=$text, foo=$foo)"
> }
> }
> {code}
> {code}
> class NamedVariantTestClass {
> final Integer number; final String text; final Foo foo
> @NamedVariant NamedVariantTestClass(Integer number = 1234, String text =
> "abc", Foo foo = new Foo(5678, 'Foo')) {
> this.number = number; this.text = text; this.foo = foo
> }
> @Override String toString() { "NVTC(number=$number, text=$text,
> foo=$foo)" }
> }
> {code}
> {code}
> class Foo {
> final Number x; final String s
> Foo(Number x, String s) { this.x = x; this.s = s }
> @Override String toString() { "Foo($x,'$s')" }
> }
> {code}
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