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import gc
import unittest
from clang.cindex import CursorKind
from clang.cindex import TranslationUnit
from clang.cindex import TypeKind
from .util import get_cursor
from .util import get_tu
kInput = """\
typedef int I;
struct teststruct {
int a;
I b;
long c;
unsigned long d;
signed long e;
const int f;
int *g;
int ***h;
};
"""
constarrayInput="""
struct teststruct {
void *A[2];
};
"""
class TestType(unittest.TestCase):
def test_a_struct(self):
tu = get_tu(kInput)
teststruct = get_cursor(tu, 'teststruct')
self.assertIsNotNone(teststruct, "Could not find teststruct.")
fields = list(teststruct.get_children())
self.assertEqual(fields[0].kind, CursorKind.FIELD_DECL)
self.assertIsNotNone(fields[0].translation_unit)
self.assertEqual(fields[0].spelling, 'a')
self.assertFalse(fields[0].type.is_const_qualified())
self.assertEqual(fields[0].type.kind, TypeKind.INT)
self.assertEqual(fields[0].type.get_canonical().kind, TypeKind.INT)
self.assertEqual(fields[0].type.get_typedef_name(), '')
self.assertEqual(fields[1].kind, CursorKind.FIELD_DECL)
self.assertIsNotNone(fields[1].translation_unit)
self.assertEqual(fields[1].spelling, 'b')
self.assertFalse(fields[1].type.is_const_qualified())
self.assertEqual(fields[1].type.kind, TypeKind.TYPEDEF)
self.assertEqual(fields[1].type.get_canonical().kind, TypeKind.INT)
self.assertEqual(fields[1].type.get_declaration().spelling, 'I')
self.assertEqual(fields[1].type.get_typedef_name(), 'I')
self.assertEqual(fields[2].kind, CursorKind.FIELD_DECL)
self.assertIsNotNone(fields[2].translation_unit)
self.assertEqual(fields[2].spelling, 'c')
self.assertFalse(fields[2].type.is_const_qualified())
self.assertEqual(fields[2].type.kind, TypeKind.LONG)
self.assertEqual(fields[2].type.get_canonical().kind, TypeKind.LONG)
self.assertEqual(fields[2].type.get_typedef_name(), '')
self.assertEqual(fields[3].kind, CursorKind.FIELD_DECL)
self.assertIsNotNone(fields[3].translation_unit)
self.assertEqual(fields[3].spelling, 'd')
self.assertFalse(fields[3].type.is_const_qualified())
self.assertEqual(fields[3].type.kind, TypeKind.ULONG)
self.assertEqual(fields[3].type.get_canonical().kind, TypeKind.ULONG)
self.assertEqual(fields[3].type.get_typedef_name(), '')
self.assertEqual(fields[4].kind, CursorKind.FIELD_DECL)
self.assertIsNotNone(fields[4].translation_unit)
self.assertEqual(fields[4].spelling, 'e')
self.assertFalse(fields[4].type.is_const_qualified())
self.assertEqual(fields[4].type.kind, TypeKind.LONG)
self.assertEqual(fields[4].type.get_canonical().kind, TypeKind.LONG)
self.assertEqual(fields[4].type.get_typedef_name(), '')
self.assertEqual(fields[5].kind, CursorKind.FIELD_DECL)
self.assertIsNotNone(fields[5].translation_unit)
self.assertEqual(fields[5].spelling, 'f')
self.assertTrue(fields[5].type.is_const_qualified())
self.assertEqual(fields[5].type.kind, TypeKind.INT)
self.assertEqual(fields[5].type.get_canonical().kind, TypeKind.INT)
self.assertEqual(fields[5].type.get_typedef_name(), '')
self.assertEqual(fields[6].kind, CursorKind.FIELD_DECL)
self.assertIsNotNone(fields[6].translation_unit)
self.assertEqual(fields[6].spelling, 'g')
self.assertFalse(fields[6].type.is_const_qualified())
self.assertEqual(fields[6].type.kind, TypeKind.POINTER)
self.assertEqual(fields[6].type.get_pointee().kind, TypeKind.INT)
self.assertEqual(fields[6].type.get_typedef_name(), '')
self.assertEqual(fields[7].kind, CursorKind.FIELD_DECL)
self.assertIsNotNone(fields[7].translation_unit)
self.assertEqual(fields[7].spelling, 'h')
self.assertFalse(fields[7].type.is_const_qualified())
self.assertEqual(fields[7].type.kind, TypeKind.POINTER)
self.assertEqual(fields[7].type.get_pointee().kind, TypeKind.POINTER)
self.assertEqual(fields[7].type.get_pointee().get_pointee().kind, TypeKind.POINTER)
self.assertEqual(fields[7].type.get_pointee().get_pointee().get_pointee().kind, TypeKind.INT)
self.assertEqual(fields[7].type.get_typedef_name(), '')
def test_references(self):
"""Ensure that a Type maintains a reference to a TranslationUnit."""
tu = get_tu('int x;')
children = list(tu.cursor.get_children())
self.assertGreater(len(children), 0)
cursor = children[0]
t = cursor.type
self.assertIsInstance(t.translation_unit, TranslationUnit)
# Delete main TranslationUnit reference and force a GC.
del tu
gc.collect()
self.assertIsInstance(t.translation_unit, TranslationUnit)
# If the TU was destroyed, this should cause a segfault.
decl = t.get_declaration()
def testConstantArray(self):
tu = get_tu(constarrayInput)
teststruct = get_cursor(tu, 'teststruct')
self.assertIsNotNone(teststruct, "Didn't find teststruct??")
fields = list(teststruct.get_children())
self.assertEqual(fields[0].spelling, 'A')
self.assertEqual(fields[0].type.kind, TypeKind.CONSTANTARRAY)
self.assertIsNotNone(fields[0].type.get_array_element_type())
self.assertEqual(fields[0].type.get_array_element_type().kind, TypeKind.POINTER)
self.assertEqual(fields[0].type.get_array_size(), 2)
def test_equal(self):
"""Ensure equivalence operators work on Type."""
source = 'int a; int b; void *v;'
tu = get_tu(source)
a = get_cursor(tu, 'a')
b = get_cursor(tu, 'b')
v = get_cursor(tu, 'v')
self.assertIsNotNone(a)
self.assertIsNotNone(b)
self.assertIsNotNone(v)
self.assertEqual(a.type, b.type)
self.assertNotEqual(a.type, v.type)
self.assertNotEqual(a.type, None)
self.assertNotEqual(a.type, 'foo')
def test_type_spelling(self):
"""Ensure Type.spelling works."""
tu = get_tu('int c[5]; void f(int i[]); int x; int v[x];')
c = get_cursor(tu, 'c')
i = get_cursor(tu, 'i')
x = get_cursor(tu, 'x')
v = get_cursor(tu, 'v')
self.assertIsNotNone(c)
self.assertIsNotNone(i)
self.assertIsNotNone(x)
self.assertIsNotNone(v)
self.assertEqual(c.type.spelling, "int [5]")
self.assertEqual(i.type.spelling, "int []")
self.assertEqual(x.type.spelling, "int")
self.assertEqual(v.type.spelling, "int [x]")
def test_typekind_spelling(self):
"""Ensure TypeKind.spelling works."""
tu = get_tu('int a;')
a = get_cursor(tu, 'a')
self.assertIsNotNone(a)
self.assertEqual(a.type.kind.spelling, 'Int')
def test_function_argument_types(self):
"""Ensure that Type.argument_types() works as expected."""
tu = get_tu('void f(int, int);')
f = get_cursor(tu, 'f')
self.assertIsNotNone(f)
args = f.type.argument_types()
self.assertIsNotNone(args)
self.assertEqual(len(args), 2)
t0 = args[0]
self.assertIsNotNone(t0)
self.assertEqual(t0.kind, TypeKind.INT)
t1 = args[1]
self.assertIsNotNone(t1)
self.assertEqual(t1.kind, TypeKind.INT)
args2 = list(args)
self.assertEqual(len(args2), 2)
self.assertEqual(t0, args2[0])
self.assertEqual(t1, args2[1])
def test_argument_types_string_key(self):
"""Ensure that non-int keys raise a TypeError."""
tu = get_tu('void f(int, int);')
f = get_cursor(tu, 'f')
self.assertIsNotNone(f)
args = f.type.argument_types()
self.assertEqual(len(args), 2)
with self.assertRaises(TypeError):
args['foo']
def test_argument_types_negative_index(self):
"""Ensure that negative indexes on argument_types Raises an IndexError."""
tu = get_tu('void f(int, int);')
f = get_cursor(tu, 'f')
args = f.type.argument_types()
with self.assertRaises(IndexError):
args[-1]
def test_argument_types_overflow_index(self):
"""Ensure that indexes beyond the length of Type.argument_types() raise."""
tu = get_tu('void f(int, int);')
f = get_cursor(tu, 'f')
args = f.type.argument_types()
with self.assertRaises(IndexError):
args[2]
def test_argument_types_invalid_type(self):
"""Ensure that obtaining argument_types on a Type without them raises."""
tu = get_tu('int i;')
i = get_cursor(tu, 'i')
self.assertIsNotNone(i)
with self.assertRaises(Exception):
i.type.argument_types()
def test_is_pod(self):
"""Ensure Type.is_pod() works."""
tu = get_tu('int i; void f();')
i = get_cursor(tu, 'i')
f = get_cursor(tu, 'f')
self.assertIsNotNone(i)
self.assertIsNotNone(f)
self.assertTrue(i.type.is_pod())
self.assertFalse(f.type.is_pod())
def test_function_variadic(self):
"""Ensure Type.is_function_variadic works."""
source ="""
#include <stdarg.h>
void foo(int a, ...);
void bar(int a, int b);
"""
tu = get_tu(source)
foo = get_cursor(tu, 'foo')
bar = get_cursor(tu, 'bar')
self.assertIsNotNone(foo)
self.assertIsNotNone(bar)
self.assertIsInstance(foo.type.is_function_variadic(), bool)
self.assertTrue(foo.type.is_function_variadic())
self.assertFalse(bar.type.is_function_variadic())
def test_element_type(self):
"""Ensure Type.element_type works."""
tu = get_tu('int c[5]; void f(int i[]); int x; int v[x];')
c = get_cursor(tu, 'c')
i = get_cursor(tu, 'i')
v = get_cursor(tu, 'v')
self.assertIsNotNone(c)
self.assertIsNotNone(i)
self.assertIsNotNone(v)
self.assertEqual(c.type.kind, TypeKind.CONSTANTARRAY)
self.assertEqual(c.type.element_type.kind, TypeKind.INT)
self.assertEqual(i.type.kind, TypeKind.INCOMPLETEARRAY)
self.assertEqual(i.type.element_type.kind, TypeKind.INT)
self.assertEqual(v.type.kind, TypeKind.VARIABLEARRAY)
self.assertEqual(v.type.element_type.kind, TypeKind.INT)
def test_invalid_element_type(self):
"""Ensure Type.element_type raises if type doesn't have elements."""
tu = get_tu('int i;')
i = get_cursor(tu, 'i')
self.assertIsNotNone(i)
with self.assertRaises(Exception):
i.element_type
def test_element_count(self):
"""Ensure Type.element_count works."""
tu = get_tu('int i[5]; int j;')
i = get_cursor(tu, 'i')
j = get_cursor(tu, 'j')
self.assertIsNotNone(i)
self.assertIsNotNone(j)
self.assertEqual(i.type.element_count, 5)
with self.assertRaises(Exception):
j.type.element_count
def test_is_volatile_qualified(self):
"""Ensure Type.is_volatile_qualified works."""
tu = get_tu('volatile int i = 4; int j = 2;')
i = get_cursor(tu, 'i')
j = get_cursor(tu, 'j')
self.assertIsNotNone(i)
self.assertIsNotNone(j)
self.assertIsInstance(i.type.is_volatile_qualified(), bool)
self.assertTrue(i.type.is_volatile_qualified())
self.assertFalse(j.type.is_volatile_qualified())
def test_is_restrict_qualified(self):
"""Ensure Type.is_restrict_qualified works."""
tu = get_tu('struct s { void * restrict i; void * j; };')
i = get_cursor(tu, 'i')
j = get_cursor(tu, 'j')
self.assertIsNotNone(i)
self.assertIsNotNone(j)
self.assertIsInstance(i.type.is_restrict_qualified(), bool)
self.assertTrue(i.type.is_restrict_qualified())
self.assertFalse(j.type.is_restrict_qualified())
def test_record_layout(self):
"""Ensure Cursor.type.get_size, Cursor.type.get_align and
Cursor.type.get_offset works."""
source ="""
struct a {
long a1;
long a2:3;
long a3:4;
long long a4;
};
"""
tries=[(['-target','i386-linux-gnu'],(4,16,0,32,35,64)),
(['-target','nvptx64-unknown-unknown'],(8,24,0,64,67,128)),
(['-target','i386-pc-win32'],(8,16,0,32,35,64)),
(['-target','msp430-none-none'],(2,14,0,32,35,48))]
for flags, values in tries:
align,total,a1,a2,a3,a4 = values
tu = get_tu(source, flags=flags)
teststruct = get_cursor(tu, 'a')
fields = list(teststruct.get_children())
self.assertEqual(teststruct.type.get_align(), align)
self.assertEqual(teststruct.type.get_size(), total)
self.assertEqual(teststruct.type.get_offset(fields[0].spelling), a1)
self.assertEqual(teststruct.type.get_offset(fields[1].spelling), a2)
self.assertEqual(teststruct.type.get_offset(fields[2].spelling), a3)
self.assertEqual(teststruct.type.get_offset(fields[3].spelling), a4)
self.assertEqual(fields[0].is_bitfield(), False)
self.assertEqual(fields[1].is_bitfield(), True)
self.assertEqual(fields[1].get_bitfield_width(), 3)
self.assertEqual(fields[2].is_bitfield(), True)
self.assertEqual(fields[2].get_bitfield_width(), 4)
self.assertEqual(fields[3].is_bitfield(), False)
def test_offset(self):
"""Ensure Cursor.get_record_field_offset works in anonymous records"""
source="""
struct Test {
struct {int a;} typeanon;
struct {
int bariton;
union {
int foo;
};
};
int bar;
};"""
tries=[(['-target','i386-linux-gnu'],(4,16,0,32,64,96)),
(['-target','nvptx64-unknown-unknown'],(8,24,0,32,64,96)),
(['-target','i386-pc-win32'],(8,16,0,32,64,96)),
(['-target','msp430-none-none'],(2,14,0,32,64,96))]
for flags, values in tries:
align,total,f1,bariton,foo,bar = values
tu = get_tu(source)
teststruct = get_cursor(tu, 'Test')
children = list(teststruct.get_children())
fields = list(teststruct.type.get_fields())
self.assertEqual(children[0].kind, CursorKind.STRUCT_DECL)
self.assertNotEqual(children[0].spelling, "typeanon")
self.assertEqual(children[1].spelling, "typeanon")
self.assertEqual(fields[0].kind, CursorKind.FIELD_DECL)
self.assertEqual(fields[1].kind, CursorKind.FIELD_DECL)
self.assertTrue(fields[1].is_anonymous())
self.assertEqual(teststruct.type.get_offset("typeanon"), f1)
self.assertEqual(teststruct.type.get_offset("bariton"), bariton)
self.assertEqual(teststruct.type.get_offset("foo"), foo)
self.assertEqual(teststruct.type.get_offset("bar"), bar)
def test_decay(self):
"""Ensure decayed types are handled as the original type"""
tu = get_tu("void foo(int a[]);")
foo = get_cursor(tu, 'foo')
a = foo.type.argument_types()[0]
self.assertEqual(a.kind, TypeKind.INCOMPLETEARRAY)
self.assertEqual(a.element_type.kind, TypeKind.INT)
self.assertEqual(a.get_canonical().kind, TypeKind.INCOMPLETEARRAY)
def test_addrspace(self):
"""Ensure the address space can be queried"""
tu = get_tu('__attribute__((address_space(2))) int testInteger = 3;', 'c')
testInteger = get_cursor(tu, 'testInteger')
self.assertIsNotNone(testInteger, "Could not find testInteger.")
self.assertEqual(testInteger.type.get_address_space(), 2)
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