blob: bac1744c50393b64dd08ed6e0727a55f2dccd1e5 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
|
import scala.reflect.macros.blackbox.Context
import scala.reflect.runtime.{universe => ru}
object StaticReflect {
def method[A](name: String): ru.Type = macro methodImpl[A]
def methodImpl[A: c.WeakTypeTag](c: Context)(name: c.Expr[String]): c.Expr[ru.Type] = {
import c.universe._
val nameName: TermName = name.tree match {
case Literal(Constant(str: String)) => TermName(str)
case _ => c.error(c.enclosingPosition, s"Method name not constant.") ; return reify(ru.NoType)
}
val clazz = weakTypeOf[A]
clazz member nameName match {
case NoSymbol => c.error(c.enclosingPosition, s"No member called $nameName in $clazz.") ; reify(ru.NoType)
case member =>
val mtpe = member typeSignatureIn clazz
val mtag = c.reifyType(treeBuild.mkRuntimeUniverseRef, Select(treeBuild.mkRuntimeUniverseRef, TermName("rootMirror")), mtpe)
val mtree = Select(mtag, TermName("tpe"))
c.Expr[ru.Type](mtree)
}
}
}
|