compile: move MMLocalClass::compare to AbstractMetamodel and rename to total_order_co...

[nit.git] / src / metamodel / abstractmetamodel.nit

diff --git a/src/metamodel/abstractmetamodel.nit b/src/metamodel/abstractmetamodel.nit
index 6eb24b9..546b9fd 100644 (file)
--- a/src/metamodel/abstractmetamodel.nit
+++ b/src/metamodel/abstractmetamodel.nit
@@ -325,7 +325,7 @@ end
 # Local classes are classes defined, refined or imported in a module
 class MMLocalClass
        # The name of the local class
-        readable var _name: Symbol
+       readable var _name: Symbol
 
        # Arity of the local class (if generic)
        # FIXME: How to move this into the generic module in a sane way?
@@ -506,6 +506,28 @@ class MMLocalClass
        do
                return _name.to_s
        end
+
+       # Comparaison in a total order that superset the class refinement and the class specialisation relations
+       fun total_order_compare(b: MMLocalClass): Int
+       do
+               var a = self
+               if a == b then
+                       return 0
+               else if a.module.mhe < b.module then
+                       return 1
+               else if b.module.mhe < a.module then
+                       return -1
+               end
+               var ar = a.cshe.rank
+               var br = b.cshe.rank
+               if ar > br then
+                       return 1
+               else if br > ar then
+                       return -1
+               else
+                       return b.name.to_s <=> a.name.to_s
+               end
+       end
 end
 
 # A global property gather local properties that correspond to a same message