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import scala.tools.nsc._
object Test {
/**
* Type inference overlooks constraints posed by type parameters in annotations on types.
*/
val testCode = """
class posingAs[A] extends annotation.TypeConstraint
def resolve[A,B](x: A @posingAs[B]): B = x.asInstanceOf[B]
val x = resolve(7: @posingAs[Any])
"""
def main(args: Array[String]) {
val settings = new Settings()
settings.classpath.value = System.getProperty("java.class.path")
val tool = new interpreter.IMain(settings)
val global = tool.global
import global._
import definitions._
object checker extends AnnotationChecker {
/** Check annotations to decide whether tpe1 <:< tpe2 */
def annotationsConform(tpe1: Type, tpe2: Type): Boolean = {
tpe1.annotations.forall(a1 => tpe2.annotations.forall(a2 => a1.atp <:< a2.atp))
}
}
global.addAnnotationChecker(checker)
tool.interpret(testCode)
}
}
|
