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import unittest
from Cython.Compiler import PyrexTypes as pt
from Cython.Compiler.ExprNodes import NameNode
from Cython.Compiler.PyrexTypes import CFuncTypeArg
def cfunctype(*arg_types):
return pt.CFuncType(pt.c_int_type,
[ CFuncTypeArg("name", arg_type, None) for arg_type in arg_types ])
def cppclasstype(name, base_classes):
return pt.CppClassType(name, None, 'CPP_'+name, base_classes)
class SignatureMatcherTest(unittest.TestCase):
"""
Test the signature matching algorithm for overloaded signatures.
"""
def assertMatches(self, expected_type, arg_types, functions):
match = pt.best_match(arg_types, functions)
if expected_type is not None:
self.assertNotEqual(None, match)
self.assertEqual(expected_type, match.type)
def test_cpp_reference_single_arg(self):
function_types = [
cfunctype(pt.CReferenceType(pt.c_int_type)),
cfunctype(pt.CReferenceType(pt.c_long_type)),
cfunctype(pt.CReferenceType(pt.c_double_type)),
]
functions = [ NameNode(None, type=t) for t in function_types ]
self.assertMatches(function_types[0], [pt.c_int_type], functions)
self.assertMatches(function_types[1], [pt.c_long_type], functions)
self.assertMatches(function_types[2], [pt.c_double_type], functions)
def test_cpp_reference_two_args(self):
function_types = [
cfunctype(
pt.CReferenceType(pt.c_int_type), pt.CReferenceType(pt.c_long_type)),
cfunctype(
pt.CReferenceType(pt.c_long_type), pt.CReferenceType(pt.c_long_type)),
]
functions = [ NameNode(None, type=t) for t in function_types ]
self.assertMatches(function_types[0], [pt.c_int_type, pt.c_long_type], functions)
self.assertMatches(function_types[1], [pt.c_long_type, pt.c_long_type], functions)
self.assertMatches(function_types[1], [pt.c_long_type, pt.c_int_type], functions)
def test_cpp_reference_cpp_class(self):
classes = [ cppclasstype("Test%d" % i, []) for i in range(2) ]
function_types = [
cfunctype(pt.CReferenceType(classes[0])),
cfunctype(pt.CReferenceType(classes[1])),
]
functions = [ NameNode(None, type=t) for t in function_types ]
self.assertMatches(function_types[0], [classes[0]], functions)
self.assertMatches(function_types[1], [classes[1]], functions)
def test_cpp_reference_cpp_class_and_int(self):
classes = [ cppclasstype("Test%d" % i, []) for i in range(2) ]
function_types = [
cfunctype(pt.CReferenceType(classes[0]), pt.c_int_type),
cfunctype(pt.CReferenceType(classes[0]), pt.c_long_type),
cfunctype(pt.CReferenceType(classes[1]), pt.c_int_type),
cfunctype(pt.CReferenceType(classes[1]), pt.c_long_type),
]
functions = [ NameNode(None, type=t) for t in function_types ]
self.assertMatches(function_types[0], [classes[0], pt.c_int_type], functions)
self.assertMatches(function_types[1], [classes[0], pt.c_long_type], functions)
self.assertMatches(function_types[2], [classes[1], pt.c_int_type], functions)
self.assertMatches(function_types[3], [classes[1], pt.c_long_type], functions)
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