[jira] [Comment Edited] (GROOVY-9347) STC: lambda expression on wildcard generics fail to resolve param type(s)

["Eric Milles (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/GROOVY-9347?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17000323#comment-17000323 ] 

Eric Milles edited comment on GROOVY-9347 at 12/19/19 7:36 PM:
---------------------------------------------------------------

{{StaticTypeCheckingVisitor#inferSAMType}} cannot collect generics correctly from {{forEach(Consumer<? super T> c)}} and so the param type is Object.

PR #1126 fixes the assignment case, which is handled by separate methods:
{code:groovy}
@groovy.transform.CompileStatic
void test() {
    int sum = 0
    java.util.function.Consumer<? super Integer> add = i -> sum += i
}
{code}


was (Author: emilles):
{{StaticTypeCheckingVisitor#inferSAMType}} cannot collect generics correctly from {{forEach(Consumer<? super T> c)}} and so the param type is Object.

PR #1126 fixes the assignment case, which is handled by separate methods:
{code:groovy}
int sum = 0
java.util.function.Consumer<? super Integer> add = i -> sum += i
{code}

> STC: lambda expression on wildcard generics fail to resolve param type(s)
> -------------------------------------------------------------------------
>
>                 Key: GROOVY-9347
>                 URL: https://issues.apache.org/jira/browse/GROOVY-9347
>             Project: Groovy
>          Issue Type: Bug
>    Affects Versions: 3.0.0-rc-2
>            Reporter: Eric Milles
>            Priority: Major
>
> Follow up to GROOVY-9342.  Consider the following:
> {code:groovy}
> @groovy.transform.CompileStatic
> class Test1 {
>     static int acc = 1
>     static { [1, 2, 3].forEach(e -> acc += e) }
> }
> assert Test1.acc == 7
> {code}
> {code}
> org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
>     TestScript60.groovy: 5: [Static type checking] - Cannot find matching method int#plus(java.lang.Object). Please check if the declared type is correct and if the method exists.
>      @ line 5, column 49.
>        atic { [1, 2, 3].forEach(e -> acc += e)
>                                      ^
>     1 error
>         at org.codehaus.groovy.control.ErrorCollector.failIfErrors(ErrorCollector.java:287)
>         at org.codehaus.groovy.control.CompilationUnit.applyToPrimaryClassNodes(CompilationUnit.java:1091)
>         at org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:633)
>         at org.codehaus.groovy.control.CompilationUnit.processPhaseOperations(CompilationUnit.java:612)
>         at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:589)
>         at groovy.lang.GroovyClassLoader.doParseClass(GroovyClassLoader.java:367)
>         at groovy.lang.GroovyClassLoader.lambda$parseClass$2(GroovyClassLoader.java:310)
>         ...
> {code}



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