Resolve "Specify internal input/output dependencies of an Operation"

Closes #74 (closed)

b_asic/operation.py

@@ -181,10 +181,8 @@ class Operation(GraphComponent, SignalSourceProvider):
         raise NotImplementedError
 
     @abstractmethod
-    def depends(self, output_index: int, input_index: int) -> bool:
-        """Check if the output at the given output index depends on the input at the
-        given input index in order to be evaluated.
-        """
+    def inputs_required_for_output(self, output_index: int) -> Iterable[int]:
+        """Get the input indices of all inputs in this operation whose values are required in order to evalueate the output at the given output index."""
         raise NotImplementedError
 
 
@@ -347,12 +345,10 @@ class AbstractOperation(Operation, AbstractGraphComponent):
             pass
         return [self]
 
-    def depends(self, output_index: int, input_index: int) -> bool:
+    def inputs_required_for_output(self, output_index: int) -> Iterable[int]:
         if output_index < 0 or output_index >= self.output_count:
             raise IndexError(f"Output index out of range (expected 0-{self.output_count - 1}, got {output_index})")
-        if input_index < 0 or input_index >= self.input_count:
-            raise IndexError(f"Input index out of range (expected 0-{self.input_count - 1}, got {input_index})")
-        return True # By default, assume each output depends on all inputs.
+        return [i for i in range(self.input_count)] # By default, assume each output depends on all inputs.
 
     @property
     def neighbors(self) -> Iterable[GraphComponent]: