How to access to generic class field via scala-reflect and TypeTag (Scala 2.10) -

i trying check if field exists in generic class.

import scala.reflect.runtime.{universe => ru}     class example[t:ru.typetag](val value:t)  object example {   def apply[t:ru.typetag](value:t, fieldname: string) : example[t] = {     val t = ru.typeof[t]     val hasfield: boolean = ??? // how can check class t has field name fieldname?      if(hasfield)       new example(value)     else       throw new runtimeexception()   } }  case class foo(field:string) object test{   example(foo("hola"), "field") // work   example(foo("hola"), "other") // throws exception } 

how can implement this??

scala 2.10:

val hasfield = t.declarations.exists { _.name.decodedname.tostring == fieldname } 

scala 2.11:

val hasfield = t.decls.exists { _.name.decodedname.tostring == fieldname } 

edit: didn't notice scala 2.10 requirement @ first