model: add `MEntity::is_broken`

[nit.git] / src / model / model_base.nit

diff --git a/src/model/model_base.nit b/src/model/model_base.nit
index fd2e1d1..8b33f15 100644 (file)
--- a/src/model/model_base.nit
+++ b/src/model/model_base.nit
@@ -64,6 +64,20 @@ abstract class MEntity
 
        # A Model Entity has a direct link to its model
        fun model: Model is abstract
+
+       # The indication that the entity did not pass some semantic verifications.
+       #
+       # This simple flag is set by a given analysis to say that the entity is broken and unusable in
+       # an execution.
+       # When an entity status is set to broken, it is usually associated with a error message.
+       #
+       # If it is safe to do so, clients of the model SHOULD just skip broken entities in their processing.
+       # Clients that do not care about the executability (e.g. metrics) MAY still process the entity or
+       # perform specific checks to determinate the validity of the entity.
+       #
+       # Note that the broken status is not propagated to enclosing and enclosed entities.
+       # e.g. a broken method does not make the whole module broken.
+       var is_broken = false is writable
 end
 
 # Something that represents a concern
@@ -102,6 +116,16 @@ class MVisibility
        end
 end
 
+# A `Comparator` to sort mentities by their names.
+class MEntityNameSorter
+       super Comparator
+
+       redef type COMPARED: MEntity
+
+       # Returns `a.name <=> b.name`.
+       redef fun compare(a, b) do return a.name <=> b.name
+end
+
 # The visibility level `intrude`
 fun intrude_visibility: MVisibility do return once new MVisibility("intrude", 5)
 # The visibility level `public`