Fix currying for bound functions

param/depends.py

@@ -153,6 +153,8 @@ def _depends(*args, **kw):
     for dep in deps:
         if isinstance(dep, str):
             string_specs = True
+        elif hasattr(dep, '_dinfo'):
+            pass
         elif not isinstance(dep, Parameter):
             raise ValueError('The depends decorator only accepts string '
                              'types referencing a parameter or parameter '
@@ -325,7 +327,6 @@ async def wrapped(*wargs, **wkwargs):
         @depends(**dependencies, watch=watch)
         def wrapped(*wargs, **wkwargs):
             combined_args, combined_kwargs = combine_arguments(wargs, wkwargs)
-
             return eval_fn()(*combined_args, **combined_kwargs)
     wrapped.__bound_function__ = function
     wrapped.reactive = lambda: reactive(wrapped)

tests/testbind.py

@@ -39,6 +39,12 @@ def test_bind_constant_args_and_kwargs():
 def test_bind_constant_args_and_kwargs_partial():
     assert bind(identity, 1, bar=3)(2, baz=4) == ((1, 2), {'bar': 3, 'baz': 4})
 
+def test_curry_bind_args():
+    assert bind(bind(identity, 1), 2)() == ((1, 2), {})
+
+def test_curry_bind_kwargs():
+    assert bind(bind(identity, foo=1), bar=2)() == ((), {'foo': 1, 'bar': 2})
+
 def test_bind_class_param_as_arg():
     bound_fn = bind(identity, Parameters.param.string)
     assert bound_fn() == (('string',), {})
@@ -139,6 +145,18 @@ def test_bind_instance_params_and_constants_as_args_and_kwargs():
     P.number = 6.28
     assert bound_fn() == (('foo', 'baz',), {'num': 6.28, 'bar': 6})
 
+def test_bind_curry_function_with_deps():
+    P = Parameters()
+    bound_fn = bind(
+        identity, P.param.string, num=P.param.number
+    )
+    curried_fn = bind(bound_fn, const=3)
+    assert curried_fn() == (('string',), {'num': 3.14, 'const': 3})
+    P.string = 'baz'
+    assert curried_fn() == (('baz',), {'num': 3.14, 'const': 3})
+    P.number = 6.28
+    assert curried_fn() == (('baz',), {'num': 6.28, 'const': 3})
+
 def test_bind_bound_function_to_arg():
     P = Parameters(integer=1)