loader: new method `ModelBuilder::mmodule2node` to protect the access to `mmodule2nmo...

Signed-off-by: Jean Privat <jean@pryen.org>

diff --git a/src/loader.nit b/src/loader.nit
index 14ec4fe..d5b8797 100644 (file)
--- a/src/loader.nit
+++ b/src/loader.nit
@@ -553,6 +553,15 @@ redef class ModelBuilder
        # Register the nmodule associated to each mmodule
        # FIXME: why not refine the `MModule` class with a nullable attribute?
        var mmodule2nmodule = new HashMap[MModule, AModule]
+
+       # Retrieve the associated AST node of a mmodule.
+       # This method is used to associate model entity with syntactic entities.
+       #
+       # If the module is not associated with a node, returns null.
+       fun mmodule2node(mmodule: MModule): nullable AModule
+       do
+               return mmodule2nmodule.get_or_null(mmodule)
+       end
 end
 
 # File-system location of a module (file) that is identified but not always loaded.