model: add MEntity::mdoc_or_fallback to get more documentation

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

diff --git a/src/model/mmodule.nit b/src/model/mmodule.nit
index f2c11a6..a92d065 100644 (file)
--- a/src/model/mmodule.nit
+++ b/src/model/mmodule.nit
@@ -63,6 +63,13 @@ redef class MGroup
        # Return `null` if the group has no default module or if the default
        # module is not loaded.
        var default_mmodule: nullable MModule = null
+
+       redef fun mdoc_or_fallback
+       do
+               if mdoc != null then return mdoc
+               if default_mmodule == null then return null
+               return default_mmodule.mdoc_or_fallback
+       end
 end
 
 # A Nit module is usually associated with a Nit source file.