File: macro-system-properties.scala

package info (click to toggle)
scala 2.11.12-5
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 62,828 kB
  • sloc: javascript: 28,808; java: 13,415; xml: 3,250; sh: 1,620; python: 756; makefile: 38; awk: 36; ansic: 6
file content (16 lines) | stat: -rw-r--r-- 735 bytes parent folder | download | duplicates (4)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
import scala.tools.nsc._
import scala.tools.partest.ReplTest

object Test extends ReplTest {
  def code = """
    import scala.language.experimental._, scala.reflect.macros.blackbox.Context
    object GrabContext {
      def lastContext = Option(System.getProperties.get("lastContext").asInstanceOf[reflect.macros.runtime.Context])
      // System.properties lets you stash true globals (unlike statics which are classloader scoped)
      def impl(c: Context)() = { import c.universe._; System.getProperties.put("lastContext", c); c.Expr[Unit](q"()") }
      def grab(): Unit = macro impl
    }
    object Test { class C(implicit a: Any) { GrabContext.grab } }
    object Test { class C(implicit a: Any) { GrabContext.grab } }
  """
}