blob: ef00f6ff322df291a7ee4a3ccace4fc1fdfcbd4a (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
|
import scala.reflect.macros.blackbox.Context
object Impls {
def toOptionOfInt(c: Context) = {
import c.{prefix => prefix}
import c.universe._
val printPrefix = Apply(Select(Ident(definitions.PredefModule), TermName("println")), List(Literal(Constant("prefix = " + prefix))))
val body = Block(List(printPrefix), Apply(Ident(definitions.SomeModule), List(Select(Select(prefix.tree, TermName("x")), TermName("toInt")))))
c.Expr[Option[Int]](body)
}
}
object Macros {
implicit def foo(x: String): Foo = new Foo(x)
class Foo(val x: String) {
def toOptionOfInt = macro Impls.toOptionOfInt
}
}
|