Complex negation

Cython/Compiler/ExprNodes.py

@@ -3706,6 +3706,7 @@ class UnopNode(ExprNode):
     #      - Allocate temporary for result if needed.
     
     subexprs = ['operand']
+    infix = True
 
     def calculate_constant_result(self):
         func = compile_time_unary_operators[self.operator]
@@ -3820,13 +3821,17 @@ class UnaryMinusNode(UnopNode):
             self.type = self.operand.type
         else:
             self.type_error()
+        if self.type.is_complex:
+            self.infix = env.directives['c99_complex']
     
     def py_operation_function(self):
         return "PyNumber_Negative"
     
     def calculate_result_code(self):
+        if self.infix:
             return "(-%s)" % self.operand.result()
-
+        else:
+            return "%s(%s)" % (self.operand.type.unary_op('-'), self.operand.result())
 
 class TildeNode(UnopNode):
     #  unary '~' operator

tests/run/complex_numbers_T305.pyx

@@ -5,11 +5,11 @@ __doc__ = u"""
     (-0.5+2j)
     
     >>> test_arithmetic(2j, 4j)
-    (6j, -2j, (-8+0j), (0.5+0j))
+    (-2j, 6j, -2j, (-8+0j), (0.5+0j))
     >>> test_arithmetic(6+12j, 3j)
-    ((6+15j), (6+9j), (-36+18j), (4-2j))
+    ((-6-12j), (6+15j), (6+9j), (-36+18j), (4-2j))
     >>> test_arithmetic(5-10j, 3+4j)
-    ((8-6j), (2-14j), (55-10j), (-1-2j))
+    ((-5+10j), (8-6j), (2-14j), (55-10j), (-1-2j))
 
     >>> test_div_by_zero(4j)
     -0.25j
@@ -57,7 +57,7 @@ def test_object_conversion(o):
     return z
 
 def test_arithmetic(double complex z, double complex w):
-    return z+w, z-w, z*w, z/w
+    return -z, z+w, z-w, z*w, z/w
 
 @cython.cdivision(False)
 def test_div_by_zero(double complex z):