refs #35 bits in BitArray/input/output reordered for better performance; started typed serialization

lynglib/src/commonMain/kotlin/net/sergeych/lynon/LynonDecoder.kt

@@ -3,6 +3,8 @@ package net.sergeych.lynon
 import net.sergeych.lyng.Scope
 import net.sergeych.lyng.obj.Obj
 import net.sergeych.lyng.obj.ObjClass
+import net.sergeych.lyng.obj.ObjInt
+import net.sergeych.lyng.obj.ObjNull
 
 open class LynonDecoder(val bin: BitInput,val settings: LynonSettings = LynonSettings.default) {
 
@@ -24,6 +26,17 @@ open class LynonDecoder(val bin: BitInput,val settings: LynonSettings = LynonSet
         }
     }
 
+    fun decodeAny(scope: Scope): Obj = decodeCached {
+        val type = LynonType.entries[bin.getBits(4).toInt()]
+        return when(type) {
+            LynonType.Null -> ObjNull
+            LynonType.Int0 -> ObjInt.Zero
+            else -> {
+                scope.raiseNotImplemented("lynon type $type")
+            }
+        }
+    }
+
     fun unpackObject(scope: Scope, type: ObjClass): Obj {
         return decodeCached { type.deserialize(scope, this) }
     }