Eric Milles created GROOVY-11307:
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Summary: Compiler error for misapplication of @FunctionalInterface
Key: GROOVY-11307
URL: https://issues.apache.org/jira/browse/GROOVY-11307
Project: Groovy
Issue Type: Improvement
Components: Compiler
Reporter: Eric Milles
{{groovyc}} does not emit errors for misuse of {{@FunctionalInterface}}. At
minimum an interface with 0 or 2+ abstract methods should be an error. Bonus
points for supporting traits as well -- a trait compiles to an interface. And
using the annotation on a class, enum or @interface is improper as well.
{code:groovy}
@FunctionalInterface
interface I {
}
{code}
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