A workaround is to cast, e.g.
list[1] = (String) null
I don't see why that is needed for null. On GROOVY_4_0_X, the map also
needs the cast. On master, only the list needs the cast. I can't
explain that either (yet).
Paul.
On Mon, Apr 14, 2025 at 5:37 PM Per Nyfelt <per.nyf...@nordnet.se> wrote:
>
> Hi,
>
> I was recently experimenting with @CompileStatic for performance improvements
> and noticed that when using the short notation of putAt to assign a null
> value I get the following error
>
> [Static type checking] - Cannot call <T>
> org.codehaus.groovy.runtime.DefaultGroovyMethods#putAt(java.util.List<T>,
> int, T) with arguments [java.util.List<java.lang.String>, int,
> java.lang.Object]
>
>
>
> Here is an example:
>
>
>
> import groovy.transform.CompileStatic
> import org.junit.jupiter.api.Test
>
> @CompileStatic
> class PutAtTest {
>
> @Test
> void testList() {
> // These all work
> def list = ['a', 'b', 'c']
> list[0] = 'aa'
> assert list[0] == 'aa'
>
> list.set(2, null)
> assert list[2] == null
>
> list.putAt(0, null)
> assert list[0] == null
>
> // This Fails
> list[1] = null
> assert list[1] == null : "Short notation not working when assigning null"
> }
>
> @Test
> void testMap() {
> // These all work
> def map = [a: 'foo', b: 'bar', c: 'baz']
> map['a'] = 'aa'
> assert map['a'] == 'aa'
>
> map.put('c', null)
> assert map['c'] == null
>
> map.putAt('a', null)
> assert map['a'] == null
>
> // This Fails
> map['b'] = null
> assert map['b'] == null : "Short notation not working when assigning
> null"
> }
> }
>
>
>
> Is this expected behavior or a bug? Does anyone know of workaround?
>
>
>
> Regards,
>
> Per
