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https://issues.apache.org/jira/browse/GROOVY-11010?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17806582#comment-17806582
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Eric Milles edited comment on GROOVY-11010 at 1/15/24 1:44 PM:
---------------------------------------------------------------
Replacing “Main::m” with “(String s) -> Main.m(s)” should allow disambiguation
by param count (see GROOVY-9881).
GROOVY-10714 seeks to apply the same for method pointer/reference. A change in
the order of steps caused a regression here for Groovy 5.
was (Author: emilles):
Replacing “Main::m” with “s -> Main.m(s)” should allow disambiguation by param
count (see GROOVY-9881).
GROOVY-10714 seeks to apply the same for method pointer/reference. A change in
the order of steps caused a regression here for Groovy 5.
> Ambiguous method reference when expecting a SAM type
> ----------------------------------------------------
>
> Key: GROOVY-11010
> URL: https://issues.apache.org/jira/browse/GROOVY-11010
> Project: Groovy
> Issue Type: Bug
> Components: Static Type Checker
> Reporter: Thodoris Sotiropoulos
> Assignee: Eric Milles
> Priority: Minor
>
> I have the following program
> {code}
> import java.util.function.*;
> class Main {
> static final void test() {
> from(Main::m);
> }
> static <K, V> void from(Function<K, V> f) {}
> static <V> void from(Supplier<V> f) {}
> static int m(String x) { return 1; }
> }
> {code}
> h3. Actual behavior
> {code}
> org.codehaus.groovy.control.MultipleCompilationErrorsException: startup
> failed:
> test.groovy: 6: [Static type checking] - Reference to method is ambiguous.
> Cannot choose between [void Main#from(java.util.function.Supplier<V>), void
> Main#from(java.util.function.Function<K, V>)]
> @ line 6, column 5.
> from(Main::m);
> ^
> 1 error
> {code}
> h3. Expected behavior
> Compile successfully
> h3. Notes
> Tested against master (commit: 5bcd83e0fde722971f97d479f1a4d6da6cd4aa5f)
> Test case adapted from (Guava library)
> {code}
> import java.util.function.*;
> class Main {
> static final void test() {
> com.google.common.cache.CacheLoader.from(Main::m);
> }
> }
> {code}
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