ConstantValue: Support general dtypes

test/test_literals.py

@@ -1,6 +1,8 @@
 __authors__ = "Martin Sandve Alnæs"
 __date__ = "2011-04-14"
 
+import numpy as np
+
 from ufl import PermutationSymbol, as_matrix, as_vector, indices, product
 from ufl.classes import Indexed
 from ufl.constantvalue import ComplexValue, FloatValue, IntValue, Zero, as_ufl
@@ -29,13 +31,15 @@ def test_float(self):
     f4 = FloatValue(1.0)
     f5 = 3 - FloatValue(1) - 1
     f6 = 3 * FloatValue(2) / 6
+    f7 = as_ufl(np.ones((1,), dtype="d")[0])
 
     assert f1 == f1
     self.assertNotEqual(f1, f2)  # IntValue vs FloatValue, == compares representations!
     assert f2 == f3
     assert f2 == f4
     assert f2 == f5
     assert f2 == f6
+    assert f2 == f7
 
 
 def test_int(self):
@@ -45,13 +49,15 @@ def test_int(self):
     f4 = IntValue(1.0)
     f5 = 3 - IntValue(1) - 1
     f6 = 3 * IntValue(2) / 6
+    f7 = as_ufl(np.ones((1,), dtype="int")[0])
 
     assert f1 == f1
     self.assertNotEqual(f1, f2)  # IntValue vs FloatValue, == compares representations!
     assert f1 == f3
     assert f1 == f4
     assert f1 == f5
     assert f2 == f6  # Division produces a FloatValue
+    assert f1 == f7
 
 
 def test_complex(self):
@@ -62,6 +68,7 @@ def test_complex(self):
     f5 = ComplexValue(1.0 + 1.0j)
     f6 = as_ufl(1.0)
     f7 = as_ufl(1.0j)
+    f8 = as_ufl(np.array([1 + 1j], dtype="complex")[0])
 
     assert f1 == f1
     assert f1 == f4
@@ -71,6 +78,7 @@ def test_complex(self):
     assert f5 == f2 + f3
     assert f4 == f5
     assert f6 + f7 == f2 + f3
+    assert f4 == f8
 
 
 def test_scalar_sums(self):

ufl/constantvalue.py

@@ -9,6 +9,7 @@
 # Modified by Anders Logg, 2011.
 # Modified by Massimiliano Leoni, 2016.
 
+import numbers
 from math import atan2
 
 import ufl
@@ -506,12 +507,12 @@ def as_ufl(expression):
     """Converts expression to an Expr if possible."""
     if isinstance(expression, (Expr, ufl.BaseForm)):
         return expression
-    elif isinstance(expression, complex):
-        return ComplexValue(expression)
-    elif isinstance(expression, float):
-        return FloatValue(expression)
-    elif isinstance(expression, int):
+    elif isinstance(expression, numbers.Integral):
         return IntValue(expression)
+    elif isinstance(expression, numbers.Real):
+        return FloatValue(expression)
+    elif isinstance(expression, numbers.Complex):
+        return ComplexValue(expression)
     else:
         raise ValueError(
             f"Invalid type conversion: {expression} can not be converted to any UFL type."