[GROOVY-10974] Fail to perform SAM conversion using method references

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 5.0.0-alpha-2, 4.0.15
• Component/s: Static Type Checker
• Assignee: Eric Milles
• Reporter: Thodoris Sotiropoulos
• Created: 14/Mar/23 12:52
• Updated: 02/Jan/24 17:04
• Resolved: 31/Aug/23 19:20

Description

I have the following program

import java.util.*;
import java.util.stream.*;
import java.util.function.*;


class Main {
  static final void test(DoubleStream x, ObjDoubleConsumer<Boolean> y,
                         BiConsumer<Boolean, Boolean> z) {
        Spliterator.OfDouble d = null;
        StreamSupport.doubleStream(d, x.collect(
            () -> true, y::accept, z::accept));
  }
}

Actual behavior

org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
Main.groovy: 10: [Static type checking] - Cannot find matching method java.util.stream.StreamSupport#doubleStream(java.util.Spliterator$OfDouble, U). Please check if the declared type is correct and if the method exists.
 @ line 10, column 9.
           StreamSupport.doubleStream(d, x.collect(
           ^

1 error

Expected behavior

Compile successfully

Tested against master (commit: d3c914693486bf137ec0992ef0dc28b79cba2fae)

Issue Links

• is related to: GROOVY-10975 STC rejects program when passing method reference in parameterized function
• relates to: GROOVY-11259 STC loses generic information on method references