feat(float-fusing): fuse float parts of an OPGraph during compilation

- this allows to be compatible with the current compiler and squash float
domains into a single int to int ArbitraryFunction

tests/hnumpy/test_compile.py

@@ -1,6 +1,7 @@
 """Test file for hnumpy compilation functions"""
 import itertools
 
+import numpy
 import pytest
 
 from hdk.common.data_types.integers import Integer
@@ -10,6 +11,14 @@ from hdk.common.extensions.table import LookupTable
 from hdk.hnumpy.compile import compile_numpy_function
 
 
+def no_fuse_unhandled(x, y):
+    """No fuse unhandled"""
+    x_intermediate = x + 2.8
+    y_intermediate = y + 9.3
+    intermediate = x_intermediate + y_intermediate
+    return intermediate.astype(numpy.int32)
+
+
 @pytest.mark.parametrize(
     "function,input_ranges,list_of_arg_names",
     [
@@ -21,6 +30,12 @@ from hdk.hnumpy.compile import compile_numpy_function
             ((4, 8), (3, 4), (0, 4)),
             ["x", "y", "z"],
         ),
+        pytest.param(
+            no_fuse_unhandled,
+            ((-2, 2), (-2, 2)),
+            ["x", "y"],
+            marks=pytest.mark.xfail(raises=ValueError),
+        ),
     ],
 )
 def test_compile_function_multiple_outputs(function, input_ranges, list_of_arg_names):