frontend serialization: don't create `core_serialize_to` if it exists

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>

diff --git a/src/frontend/serialization_phase.nit b/src/frontend/serialization_phase.nit
index 9eb01a4..4549144 100644 (file)
--- a/src/frontend/serialization_phase.nit
+++ b/src/frontend/serialization_phase.nit
@@ -181,6 +181,16 @@ private class SerializationPhasePreModel
        do
                var npropdefs = nclassdef.n_propdefs
 
+               # Do not insert a `core_serialize_to` if it already exists
+               for npropdef in npropdefs do
+                       if npropdef isa AMethPropdef then
+                               var methid = npropdef.n_methid
+                               if methid != null and methid.collect_text == "core_serialize_to" then
+                                       return
+                               end
+                       end
+               end
+
                var code = new Array[String]
                code.add "redef fun core_serialize_to(v)"
                code.add "do"