serialization: better error messages for debugging serialization engines

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

diff --git a/lib/json_serialization.nit b/lib/json_serialization.nit
index ade8318..4381ad3 100644 (file)
--- a/lib/json_serialization.nit
+++ b/lib/json_serialization.nit
@@ -142,7 +142,7 @@ class JsonDeserializer
                                var class_name = object["__class"]
                                assert class_name isa String
 
-                               assert not id_to_object.keys.has(id) else print "Error: Object with id '{id}' is deserialized twice."
+                               assert not id_to_object.keys.has(id) else print "Error: Object with id '{id}' of {class_name} is deserialized twice."
 
                                # advance on path
                                path.push object

diff --git a/lib/serialization/serialization.nit b/lib/serialization/serialization.nit
index 5c6e273..aa8da21 100644 (file)
--- a/lib/serialization/serialization.nit
+++ b/lib/serialization/serialization.nit
@@ -63,7 +63,7 @@ interface Serializer
        fun serialize_attribute(name: String, value: nullable Object)
        do
                if not try_to_serialize(value) then
-                       warn("argument {value.class_name}::{name} is not serializable.")
+                       warn("argument {name} of type {value.class_name} is not serializable.")
                end
        end
 

diff --git a/src/frontend/serialization_phase.nit b/src/frontend/serialization_phase.nit
index eca090f..1a60fd8 100644 (file)
--- a/src/frontend/serialization_phase.nit
+++ b/src/frontend/serialization_phase.nit
@@ -123,7 +123,7 @@ private class SerializationPhasePreModel
 
                        code.add ""
                        code.add "\tvar {name} = v.deserialize_attribute(\"{name}\")"
-                       code.add "\tassert {name} isa {type_name} else print \"Unsupported type for attribute '{name}', got '\{{name}.class_name\}' (ex {type_name})\""
+                       code.add "\tassert {name} isa {type_name} else print \"Unsupported type for `\{class_name\}::{name}`, got '\{{name}.class_name\}'; expected {type_name}\""
                        code.add "\tself.{name} = {name}"
                end