Packet

- Defined `PAYLOAD_MARKER` as a global

Package structure

- Placed all packet-encoding related code into a `doap.protocol` sub-package

source/doap/package.d

@@ -1,6 +1,5 @@
 module doap;
 
-import doap.packet;
-import doap.codes;
-import doap.types;
-import doap.exceptions;
+public import doap.protocol;
+
+public import doap.exceptions;

source/doap/protocol/codes.d

@@ -1,4 +1,4 @@
-module doap.codes;
+module doap.protocol.codes;
 
 public enum Code : ubyte
 {

source/doap/protocol/package.d

@@ -0,0 +1,5 @@
+module doap.protocol;
+
+public import doap.protocol.packet : CoapPacket;
+public import doap.protocol.codes : Code;
+public import doap.protocol.types : MessageType;

source/doap/protocol/packet.d

@@ -1,9 +1,14 @@
-module doap.packet;
+module doap.protocol.packet;
 
-import doap.types : MessageType;
-import doap.codes : Code;
+import doap.protocol.types : MessageType;
+import doap.protocol.codes : Code;
 import doap.exceptions : CoapException;
 
+/** 
+ * Payload marker
+ */
+private ubyte PAYLOAD_MARKER = cast(ubyte)-1;
+
 /** 
  * Represents a CoAP packet
  */
@@ -64,7 +69,7 @@ public class CoapPacket
         // FIXME: Add options encoding
 
         // Set the payload marker
-        encoded ~= cast(ubyte)-1;
+        encoded ~= PAYLOAD_MARKER;
 
         // Set the payload
         encoded ~= payload;
@@ -206,8 +211,7 @@ unittest
 
     // Ensure the payload marker is here
     ubyte seventhByte = encoded[6];
-    ubyte payloadMarker = cast(ubyte)-1;
-    assert(seventhByte == payloadMarker);
+    assert(seventhByte == PAYLOAD_MARKER);
 
     // Ensure the payload is [255, 254]
     // FIXME: Offset because of options later

source/doap/protocol/types.d

@@ -1,4 +1,4 @@
-module doap.types;
+module doap.protocol.types;
 
 public enum MessageType : ubyte
 {