gistfile1.txt

    @Fancy(annotation = FooAnno())
    fun foo() {

        @Fancy(annotation = @FooAnno())
        foo()

        @Fancy2(annotation = arrayOf(FooAnno()))
        foo()

        @Fancy2(annotation = arrayOf(@FooAnno()))
        foo()
    }
}

@Target(AnnotationTarget.CLASS, AnnotationTarget.FUNCTION,
        AnnotationTarget.VALUE_PARAMETER, AnnotationTarget.EXPRESSION)
@Retention(AnnotationRetention.SOURCE)
annotation class Fancy(val annotation: FooAnno)

@Target(AnnotationTarget.CLASS, AnnotationTarget.FUNCTION,
        AnnotationTarget.VALUE_PARAMETER, AnnotationTarget.EXPRESSION)
@Retention(AnnotationRetention.SOURCE)
annotation class Fancy2(val annotation: Array<FooAnno>)


@Target(AnnotationTarget.CLASS, AnnotationTarget.FUNCTION,
        AnnotationTarget.VALUE_PARAMETER, AnnotationTarget.EXPRESSION)
@Retention(AnnotationRetention.SOURCE)
annotation class FooAnno

gistfile2.txt

@Target(AnnotationTarget.EXPRESSION)
@kotlin.annotation.Retention
annotation class Foo(val value: String, val foo: String)

テストなどのコミット。参考にする。
shiraji/kotlin@8e5481b