frontend: use a prettier "Unknown type" when the type is not in the AST

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

diff --git a/src/frontend/serialization_phase.nit b/src/frontend/serialization_phase.nit
index 2f07196..bb5cb8d 100644 (file)
--- a/src/frontend/serialization_phase.nit
+++ b/src/frontend/serialization_phase.nit
@@ -237,11 +237,14 @@ do
 
                        var n_type = attribute.n_type
                        var type_name
+                       var type_name_pretty
                        if n_type == null then
                                # Use a place holder, we will replace it with the inferred type after the model phases
                                type_name = toolcontext.place_holder_type_name
+                               type_name_pretty = "Unknown type"
                        else
                                type_name = n_type.type_name
+                               type_name_pretty = type_name
                        end
                        var name = attribute.name
 
@@ -254,7 +257,7 @@ do
        var {{{name}}} = v.deserialize_attribute("{{{attribute.serialize_name}}}")
        if not {{{name}}} isa {{{type_name}}} then
                # Check if it was a subjectent error
-               v.errors.add new AttributeTypeError(self, "{{{attribute.serialize_name}}}", {{{name}}}, "{{{type_name}}}")
+               v.errors.add new AttributeTypeError(self, "{{{attribute.serialize_name}}}", {{{name}}}, "{{{type_name_pretty}}}")
 
                # Clear subjacent error
                if v.keep_going == false then return