Component: make deprecated arg error via illegal args; deprecate 'siz…

…e' (#3123)

psyneulink/core/components/component.py

@@ -931,6 +931,9 @@ class Component(MDFSerializable, metaclass=ComponentsMeta):
     componentType = None
 
     standard_constructor_args = {EXECUTE_UNTIL_FINISHED, FUNCTION_PARAMS, MAX_EXECUTIONS_BEFORE_FINISHED, RESET_STATEFUL_FUNCTION_WHEN, INPUT_SHAPES}
+    deprecated_constructor_args = {
+        'size': 'input_shapes',
+    }
 
     # helper attributes for MDF model spec
     _model_spec_id_parameters = 'parameters'
@@ -2150,8 +2153,11 @@ def alias_conflicts(alias, passed_name):
 
         conflicting_aliases = []
         unused_constructor_args = {}
+        deprecated_args = {}
         for p in self.parameters:
             if p.name in illegal_passed_args:
+                # p must have a constructor_argument, because otherwise
+                # p.name would not be in illegal_passed_args
                 assert p.constructor_argument is not None
                 unused_constructor_args[p.name] = p.constructor_argument
 
@@ -2164,13 +2170,26 @@ def alias_conflicts(alias, passed_name):
                 if alias_conflicts(p, passed_name):
                     conflicting_aliases.append((p.source.name, passed_name, p.name))
 
+        for arg in illegal_passed_args:
+            try:
+                deprecated_args[arg] = self.deprecated_constructor_args[arg]
+            except KeyError:
+                continue
+
         # raise constructor arg errors
         if len(unused_constructor_args) > 0:
             raise create_illegal_argument_error([
                 f"'{arg}': must use '{constr_arg}' instead"
                 for arg, constr_arg in unused_constructor_args.items()
             ])
 
+        # raise deprecated argument errors
+        if len(deprecated_args) > 0:
+            raise create_illegal_argument_error([
+                f"'{arg}' is deprecated. Use '{new_arg}' instead"
+                for arg, new_arg in deprecated_args.items()
+            ])
+
         # raise generic illegal argument error
         unknown_args = illegal_passed_args.difference(unused_constructor_args)
         if len(unknown_args) > 0:

tests/components/test_component.py

@@ -130,6 +130,13 @@ def test_execute_manual_context(self, component_type):
 
 class TestConstructorArguments:
     class NewTestMech(pnl.Mechanism_Base):
+        deprecated_constructor_args = {
+            **pnl.Mechanism_Base.deprecated_constructor_args,
+            **{
+                'deprecated_param': 'new_param',
+            }
+        }
+
         class Parameters(pnl.Mechanism_Base.Parameters):
             cca_param = pnl.Parameter('A', constructor_argument='cca_constr')
             param_with_alias = pnl.Parameter(None, constructor_argument='pwa_constr_arg', aliases=['pwa_alias'])
@@ -226,6 +233,25 @@ def test_invalid_argument(self, cls_, argument_name, param_value, params_dict_en
         constr_arg = getattr(cls_.parameters, argument_name).constructor_argument
         assert f"'{argument_name}': must use '{constr_arg}' instead" in str(err.value)
 
+    @pytest.mark.parametrize(
+        'cls_, argument_name, new_name',
+        [
+            (NewTestMech, 'deprecated_param', 'new_param'),
+            (NewTestMech, 'size', 'input_shapes'),
+            (pnl.TransferMechanism, 'size', 'input_shapes'),
+        ]
+    )
+    @pytest.mark.parametrize('params_dict_entry', [NotImplemented, 'params'])
+    def test_invalid_argument_deprecated(self, cls_, argument_name, new_name, params_dict_entry):
+        with pytest.raises(
+            pnl.ComponentError,
+            match=(
+                rf".*Illegal argument in constructor \(type: {cls_.__name__}\):"
+                f"\n\t'{argument_name}' is deprecated. Use '{new_name}' instead"
+            )
+        ):
+            cls_(**nest_dictionary({argument_name: new_name}, params_dict_entry))
+
     @pytest.mark.parametrize(
         'cls_, param_name, param_value, alias_name, alias_value',
         [