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https://issues.apache.org/jira/browse/GROOVY-11244?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17798786#comment-17798786
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Eric Milles commented on GROOVY-11244:
--------------------------------------
Is it possible to prefer a local variable declaration if open brace is followed
by newline? Then user could escape the newline to get back to parameter
interpretation. Just brain-storming an idea here.
> Cannot define Java-like lambda inside closure
> ---------------------------------------------
>
> Key: GROOVY-11244
> URL: https://issues.apache.org/jira/browse/GROOVY-11244
> Project: Groovy
> Issue Type: Bug
> Components: parser-antlr4
> Reporter: Thodoris Sotiropoulos
> Priority: Minor
>
> I have the following program
> {code}
> import java.util.function.Function;
> class Test {
> void test() {
> Closure<String> clo = {
> Function<Integer, Integer> x = (z) -> 1 + z;
> return "f";
> }
> }
> }
> {code}
> h3. Actual behavior
> {code}
> org.codehaus.groovy.control.MultipleCompilationErrorsException: startup
> failed:
> test.groovy: 6: [Static type checking] - The variable [z] is undeclared.
> @ line 6, column 49.
> eger, Integer> x = (z) -> 1 + z;
> ^
> test.groovy: 6: [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 6, column 45.
> <Integer, Integer> x = (z) -> 1 + z;
> ^
> test.groovy: 6: [Static type checking] - The variable [z] is undeclared.
> @ line 6, column 38.
> Function<Integer, Integer> x = (z) -> 1 + z;
> ^
> 3 errors
> {code}
> h3. Expected behavior
> Compile successfully
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