[GROOVY-9131] Extension method support for native method references

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.0.0-beta-2
• Assignee: Daniel Sun
• Reporter: Paul King
• Created: 21/May/19 02:13
• Updated: 22/Jul/19 04:21
• Resolved: 15/Jun/19 14:44

Description

The following two method reference statements compile and execute successfully with and without @CS (and with CS produce the correct native bytecode):

assert 'Hi'.transform(String::length) == 2 // transform is JDK12
assert 'Hi'.transform(StringGroovyMethods::size) == 2

This statement (using the extension method from StringGroovyMethods) works for dynamic Groovy:

assert 'Hi'.transform(String::size) == 2

But for static Groovy fails compilation with:

1 compilation error:
org.codehaus.groovy.syntax.RuntimeParserException: Failed to find the expected method[size(java.lang.String)] in the type[java.lang.String]

Issue Links

• links to: GitHub Pull Request #955