Fix #92 by enforcing the type information completeness and availability of annotations

Author: plokhotnyuk

macros/src/main/scala/com/github/plokhotnyuk/jsoniter_scala/macros/JsonCodecMaker.scala

@@ -299,8 +299,11 @@ object JsonCodecMaker {
       case class FieldAnnotations(name: String, transient: Boolean, stringified: Boolean)
 
       def getFieldAnnotations(tpe: Type): Map[String, FieldAnnotations] = tpe.members.collect {
-        case m: TermSymbol if m.annotations.exists(a => a.tree.tpe =:= typeOf[named]
-            || a.tree.tpe =:= typeOf[transient] || a.tree.tpe =:= typeOf[stringified]) =>
+        case m: TermSymbol if {
+          m.info // to enforce the type information completeness and availability of annotations
+          m.annotations.exists(a => a.tree.tpe =:= typeOf[named] || a.tree.tpe =:= typeOf[transient] ||
+            a.tree.tpe =:= typeOf[stringified])
+        } =>
           val fieldName = m.name.decodedName.toString.trim // FIXME: Why is there a space at the end of field name?!
           val named = m.annotations.filter(_.tree.tpe =:= typeOf[named])
           if (named.size > 1) fail(s"Duplicated '${typeOf[named]}' defined for '$fieldName' of '$tpe'.")

macros/src/test/scala/com/github/plokhotnyuk/jsoniter_scala/macros/JsonCodecMakerSpec.scala

@@ -115,9 +115,6 @@ class JsonCodecMakerSpec extends WordSpec with Matchers {
 
   case class Operators(`=<>!#%^&|*/\\~+-:$`: Int)
 
-  //FIXME: case classes with field annotation(s) should be defined in source file before `make` call for them
-  case class NameOverridden(@named("new_" + "name") oldName: String)
-
   val codecOfNameOverridden: JsonValueCodec[NameOverridden] = make[NameOverridden](CodecMakerConfig())
 
   case class Stringified(@stringified i: Int, @stringified bi: BigInt, @stringified l1: List[Int], l2: List[Int])
@@ -1158,4 +1155,6 @@ class JsonCodecMakerSpec extends WordSpec with Matchers {
   }
 
   def toString(json: Array[Byte]): String = new String(json, 0, json.length, UTF_8)
-}
+}
+
+case class NameOverridden(@named("new_" + "name") oldName: String) // intentionally declared after the `make` call