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bpo-32892: Use ast.Constant instead of specific constant AST types. (GH-9445)

This commit is contained in:
Serhiy Storchaka 2018-09-27 17:42:37 +03:00 committed by GitHub
parent a94ee12c26
commit 3f22811fef
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GPG Key ID: 4AEE18F83AFDEB23
20 changed files with 337 additions and 678 deletions
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15
Doc/library/ast.rst
View File

@ -78,8 +78,8 @@ Node classes
node = ast.UnaryOp()
node.op = ast.USub()
node.operand = ast.Num()
node.operand.n = 5
node.operand = ast.Constant()
node.operand.value = 5
node.operand.lineno = 0
node.operand.col_offset = 0
node.lineno = 0
@ -87,9 +87,16 @@ Node classes
or the more compact ::
node = ast.UnaryOp(ast.USub(), ast.Num(5, lineno=0, col_offset=0),
node = ast.UnaryOp(ast.USub(), ast.Constant(5, lineno=0, col_offset=0),
lineno=0, col_offset=0)
.. deprecated:: 3.8
Class :class:`ast.Constant` is now used for all constants. Old classes
:class:`ast.Num`, :class:`ast.Str`, :class:`ast.Bytes`,
:class:`ast.NameConstant` and :class:`ast.Ellipsis` are still available,
but they will be removed in future Python releases.
.. _abstract-grammar:
@ -239,7 +246,7 @@ and classes for traversing abstract syntax trees:
def visit_Name(self, node):
return copy_location(Subscript(
value=Name(id='data', ctx=Load()),
slice=Index(value=Str(s=node.id)),
slice=Index(value=Constant(value=node.id)),
ctx=node.ctx
), node)

5
Doc/whatsnew/3.8.rst
View File

@ -262,6 +262,11 @@ Deprecated
(Contributed by Berker Peksag in :issue:`9372`.)
* :mod:`ast` classes ``Num``, ``Str``, ``Bytes``, ``NameConstant`` and
``Ellipsis`` are considered deprecated and will be removed in future Python
versions. :class:`~ast.Constant` should be used instead.
(Contributed by Serhiy Storchaka in :issue:`32892`.)
Removed
=======

36
Include/Python-ast.h generated
View File

@ -208,11 +208,10 @@ enum _expr_kind {BoolOp_kind=1, BinOp_kind=2, UnaryOp_kind=3, Lambda_kind=4,
IfExp_kind=5, Dict_kind=6, Set_kind=7, ListComp_kind=8,
SetComp_kind=9, DictComp_kind=10, GeneratorExp_kind=11,
Await_kind=12, Yield_kind=13, YieldFrom_kind=14,
Compare_kind=15, Call_kind=16, Num_kind=17, Str_kind=18,
FormattedValue_kind=19, JoinedStr_kind=20, Bytes_kind=21,
NameConstant_kind=22, Ellipsis_kind=23, Constant_kind=24,
Attribute_kind=25, Subscript_kind=26, Starred_kind=27,
Name_kind=28, List_kind=29, Tuple_kind=30};
Compare_kind=15, Call_kind=16, FormattedValue_kind=17,
JoinedStr_kind=18, Constant_kind=19, Attribute_kind=20,
Subscript_kind=21, Starred_kind=22, Name_kind=23,
List_kind=24, Tuple_kind=25};
struct _expr {
enum _expr_kind kind;
union {
@ -297,14 +296,6 @@ struct _expr {
asdl_seq *keywords;
} Call;
struct {
object n;
} Num;
struct {
string s;
} Str;
struct {
expr_ty value;
int conversion;
@ -315,14 +306,6 @@ struct _expr {
asdl_seq *values;
} JoinedStr;
struct {
bytes s;
} Bytes;
struct {
singleton value;
} NameConstant;
struct {
constant value;
} Constant;
@ -566,23 +549,12 @@ expr_ty _Py_Compare(expr_ty left, asdl_int_seq * ops, asdl_seq * comparators,
#define Call(a0, a1, a2, a3, a4, a5) _Py_Call(a0, a1, a2, a3, a4, a5)
expr_ty _Py_Call(expr_ty func, asdl_seq * args, asdl_seq * keywords, int
lineno, int col_offset, PyArena *arena);
#define Num(a0, a1, a2, a3) _Py_Num(a0, a1, a2, a3)
expr_ty _Py_Num(object n, int lineno, int col_offset, PyArena *arena);
#define Str(a0, a1, a2, a3) _Py_Str(a0, a1, a2, a3)
expr_ty _Py_Str(string s, int lineno, int col_offset, PyArena *arena);
#define FormattedValue(a0, a1, a2, a3, a4, a5) _Py_FormattedValue(a0, a1, a2, a3, a4, a5)
expr_ty _Py_FormattedValue(expr_ty value, int conversion, expr_ty format_spec,
int lineno, int col_offset, PyArena *arena);
#define JoinedStr(a0, a1, a2, a3) _Py_JoinedStr(a0, a1, a2, a3)
expr_ty _Py_JoinedStr(asdl_seq * values, int lineno, int col_offset, PyArena
*arena);
#define Bytes(a0, a1, a2, a3) _Py_Bytes(a0, a1, a2, a3)
expr_ty _Py_Bytes(bytes s, int lineno, int col_offset, PyArena *arena);
#define NameConstant(a0, a1, a2, a3) _Py_NameConstant(a0, a1, a2, a3)
expr_ty _Py_NameConstant(singleton value, int lineno, int col_offset, PyArena
*arena);
#define Ellipsis(a0, a1, a2) _Py_Ellipsis(a0, a1, a2)
expr_ty _Py_Ellipsis(int lineno, int col_offset, PyArena *arena);
#define Constant(a0, a1, a2, a3) _Py_Constant(a0, a1, a2, a3)
expr_ty _Py_Constant(constant value, int lineno, int col_offset, PyArena
*arena);

73
Lib/ast.py
View File

@ -48,10 +48,8 @@ def literal_eval(node_or_string):
node_or_string = node_or_string.body
def _convert_num(node):
if isinstance(node, Constant):
if isinstance(node.value, (int, float, complex)):
if type(node.value) in (int, float, complex):
return node.value
elif isinstance(node, Num):
return node.n
raise ValueError('malformed node or string: ' + repr(node))
def _convert_signed_num(node):
if isinstance(node, UnaryOp) and isinstance(node.op, (UAdd, USub)):
@ -64,10 +62,6 @@ def literal_eval(node_or_string):
def _convert(node):
if isinstance(node, Constant):
return node.value
elif isinstance(node, (Str, Bytes)):
return node.s
elif isinstance(node, Num):
return node.n
elif isinstance(node, Tuple):
return tuple(map(_convert, node.elts))
elif isinstance(node, List):
@ -77,8 +71,6 @@ def literal_eval(node_or_string):
elif isinstance(node, Dict):
return dict(zip(map(_convert, node.keys),
map(_convert, node.values)))
elif isinstance(node, NameConstant):
return node.value
elif isinstance(node, BinOp) and isinstance(node.op, (Add, Sub)):
left = _convert_signed_num(node.left)
right = _convert_num(node.right)
@ -329,3 +321,66 @@ class NodeTransformer(NodeVisitor):
else:
setattr(node, field, new_node)
return node
# The following code is for backward compatibility.
# It will be removed in future.
def _getter(self):
return self.value
def _setter(self, value):
self.value = value
Constant.n = property(_getter, _setter)
Constant.s = property(_getter, _setter)
class _ABC(type):
def __instancecheck__(cls, inst):
if not isinstance(inst, Constant):
return False
if cls in _const_types:
try:
value = inst.value
except AttributeError:
return False
else:
return type(value) in _const_types[cls]
return type.__instancecheck__(cls, inst)
def _new(cls, *args, **kwargs):
if cls in _const_types:
return Constant(*args, **kwargs)
return Constant.__new__(cls, *args, **kwargs)
class Num(Constant, metaclass=_ABC):
_fields = ('n',)
__new__ = _new
class Str(Constant, metaclass=_ABC):
_fields = ('s',)
__new__ = _new
class Bytes(Constant, metaclass=_ABC):
_fields = ('s',)
__new__ = _new
class NameConstant(Constant, metaclass=_ABC):
__new__ = _new
class Ellipsis(Constant, metaclass=_ABC):
_fields = ()
def __new__(cls, *args, **kwargs):
if cls is Ellipsis:
return Constant(..., *args, **kwargs)
return Constant.__new__(cls, *args, **kwargs)
_const_types = {
Num: (int, float, complex),
Str: (str,),
Bytes: (bytes,),
NameConstant: (type(None), bool),
Ellipsis: (type(...),),
}

10
Lib/inspect.py
View File

@ -2005,14 +2005,8 @@ def _signature_fromstr(cls, obj, s, skip_bound_arg=True):
except NameError:
raise RuntimeError()
if isinstance(value, str):
return ast.Str(value)
if isinstance(value, (int, float)):
return ast.Num(value)
if isinstance(value, bytes):
return ast.Bytes(value)
if value in (True, False, None):
return ast.NameConstant(value)
if isinstance(value, (str, int, float, bytes, bool, type(None))):
return ast.Constant(value)
raise RuntimeError()
class RewriteSymbolics(ast.NodeTransformer):

202
Lib/test/test_ast.py
View File

@ -300,12 +300,16 @@ class AST_Tests(unittest.TestCase):
def test_classattrs(self):
x = ast.Num()
self.assertEqual(x._fields, ('n',))
self.assertEqual(x._fields, ('value',))
with self.assertRaises(AttributeError):
x.value
with self.assertRaises(AttributeError):
x.n
x = ast.Num(42)
self.assertEqual(x.value, 42)
self.assertEqual(x.n, 42)
with self.assertRaises(AttributeError):
@ -319,12 +323,102 @@ class AST_Tests(unittest.TestCase):
x = ast.Num(42, lineno=0)
self.assertEqual(x.lineno, 0)
self.assertEqual(x._fields, ('n',))
self.assertEqual(x._fields, ('value',))
self.assertEqual(x.value, 42)
self.assertEqual(x.n, 42)
self.assertRaises(TypeError, ast.Num, 1, 2)
self.assertRaises(TypeError, ast.Num, 1, 2, lineno=0)
self.assertEqual(ast.Num(42).n, 42)
self.assertEqual(ast.Num(4.25).n, 4.25)
self.assertEqual(ast.Num(4.25j).n, 4.25j)
self.assertEqual(ast.Str('42').s, '42')
self.assertEqual(ast.Bytes(b'42').s, b'42')
self.assertIs(ast.NameConstant(True).value, True)
self.assertIs(ast.NameConstant(False).value, False)
self.assertIs(ast.NameConstant(None).value, None)
self.assertEqual(ast.Constant(42).value, 42)
self.assertEqual(ast.Constant(4.25).value, 4.25)
self.assertEqual(ast.Constant(4.25j).value, 4.25j)
self.assertEqual(ast.Constant('42').value, '42')
self.assertEqual(ast.Constant(b'42').value, b'42')
self.assertIs(ast.Constant(True).value, True)
self.assertIs(ast.Constant(False).value, False)
self.assertIs(ast.Constant(None).value, None)
self.assertIs(ast.Constant(...).value, ...)
def test_realtype(self):
self.assertEqual(type(ast.Num(42)), ast.Constant)
self.assertEqual(type(ast.Num(4.25)), ast.Constant)
self.assertEqual(type(ast.Num(4.25j)), ast.Constant)
self.assertEqual(type(ast.Str('42')), ast.Constant)
self.assertEqual(type(ast.Bytes(b'42')), ast.Constant)
self.assertEqual(type(ast.NameConstant(True)), ast.Constant)
self.assertEqual(type(ast.NameConstant(False)), ast.Constant)
self.assertEqual(type(ast.NameConstant(None)), ast.Constant)
self.assertEqual(type(ast.Ellipsis()), ast.Constant)
def test_isinstance(self):
self.assertTrue(isinstance(ast.Num(42), ast.Num))
self.assertTrue(isinstance(ast.Num(4.2), ast.Num))
self.assertTrue(isinstance(ast.Num(4.2j), ast.Num))
self.assertTrue(isinstance(ast.Str('42'), ast.Str))
self.assertTrue(isinstance(ast.Bytes(b'42'), ast.Bytes))
self.assertTrue(isinstance(ast.NameConstant(True), ast.NameConstant))
self.assertTrue(isinstance(ast.NameConstant(False), ast.NameConstant))
self.assertTrue(isinstance(ast.NameConstant(None), ast.NameConstant))
self.assertTrue(isinstance(ast.Ellipsis(), ast.Ellipsis))
self.assertTrue(isinstance(ast.Constant(42), ast.Num))
self.assertTrue(isinstance(ast.Constant(4.2), ast.Num))
self.assertTrue(isinstance(ast.Constant(4.2j), ast.Num))
self.assertTrue(isinstance(ast.Constant('42'), ast.Str))
self.assertTrue(isinstance(ast.Constant(b'42'), ast.Bytes))
self.assertTrue(isinstance(ast.Constant(True), ast.NameConstant))
self.assertTrue(isinstance(ast.Constant(False), ast.NameConstant))
self.assertTrue(isinstance(ast.Constant(None), ast.NameConstant))
self.assertTrue(isinstance(ast.Constant(...), ast.Ellipsis))
self.assertFalse(isinstance(ast.Str('42'), ast.Num))
self.assertFalse(isinstance(ast.Num(42), ast.Str))
self.assertFalse(isinstance(ast.Str('42'), ast.Bytes))
self.assertFalse(isinstance(ast.Num(42), ast.NameConstant))
self.assertFalse(isinstance(ast.Num(42), ast.Ellipsis))
self.assertFalse(isinstance(ast.Constant('42'), ast.Num))
self.assertFalse(isinstance(ast.Constant(42), ast.Str))
self.assertFalse(isinstance(ast.Constant('42'), ast.Bytes))
self.assertFalse(isinstance(ast.Constant(42), ast.NameConstant))
self.assertFalse(isinstance(ast.Constant(42), ast.Ellipsis))
self.assertFalse(isinstance(ast.Constant(), ast.Num))
self.assertFalse(isinstance(ast.Constant(), ast.Str))
self.assertFalse(isinstance(ast.Constant(), ast.Bytes))
self.assertFalse(isinstance(ast.Constant(), ast.NameConstant))
self.assertFalse(isinstance(ast.Constant(), ast.Ellipsis))
def test_subclasses(self):
class N(ast.Num):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.z = 'spam'
class N2(ast.Num):
pass
n = N(42)
self.assertEqual(n.n, 42)
self.assertEqual(n.z, 'spam')
self.assertEqual(type(n), N)
self.assertTrue(isinstance(n, N))
self.assertTrue(isinstance(n, ast.Num))
self.assertFalse(isinstance(n, N2))
self.assertFalse(isinstance(ast.Num(42), N))
n = N(n=42)
self.assertEqual(n.n, 42)
self.assertEqual(type(n), N)
def test_module(self):
body = [ast.Num(42)]
x = ast.Module(body)
@ -446,17 +540,17 @@ class ASTHelpers_Test(unittest.TestCase):
node = ast.parse('spam(eggs, "and cheese")')
self.assertEqual(ast.dump(node),
"Module(body=[Expr(value=Call(func=Name(id='spam', ctx=Load()), "
"args=[Name(id='eggs', ctx=Load()), Str(s='and cheese')], "
"args=[Name(id='eggs', ctx=Load()), Constant(value='and cheese')], "
"keywords=[]))])"
)
self.assertEqual(ast.dump(node, annotate_fields=False),
"Module([Expr(Call(Name('spam', Load()), [Name('eggs', Load()), "
"Str('and cheese')], []))])"
"Constant('and cheese')], []))])"
)
self.assertEqual(ast.dump(node, include_attributes=True),
"Module(body=[Expr(value=Call(func=Name(id='spam', ctx=Load(), "
"lineno=1, col_offset=0), args=[Name(id='eggs', ctx=Load(), "
"lineno=1, col_offset=5), Str(s='and cheese', lineno=1, "
"lineno=1, col_offset=5), Constant(value='and cheese', lineno=1, "
"col_offset=11)], keywords=[], "
"lineno=1, col_offset=0), lineno=1, col_offset=0)])"
)
@ -465,8 +559,8 @@ class ASTHelpers_Test(unittest.TestCase):
src = ast.parse('1 + 1', mode='eval')
src.body.right = ast.copy_location(ast.Num(2), src.body.right)
self.assertEqual(ast.dump(src, include_attributes=True),
'Expression(body=BinOp(left=Num(n=1, lineno=1, col_offset=0), '
'op=Add(), right=Num(n=2, lineno=1, col_offset=4), lineno=1, '
'Expression(body=BinOp(left=Constant(value=1, lineno=1, col_offset=0), '
'op=Add(), right=Constant(value=2, lineno=1, col_offset=4), lineno=1, '
'col_offset=0))'
)
@ -477,11 +571,11 @@ class ASTHelpers_Test(unittest.TestCase):
self.assertEqual(src, ast.fix_missing_locations(src))
self.assertEqual(ast.dump(src, include_attributes=True),
"Module(body=[Expr(value=Call(func=Name(id='write', ctx=Load(), "
"lineno=1, col_offset=0), args=[Str(s='spam', lineno=1, "
"lineno=1, col_offset=0), args=[Constant(value='spam', lineno=1, "
"col_offset=6)], keywords=[], "
"lineno=1, col_offset=0), lineno=1, col_offset=0), "
"Expr(value=Call(func=Name(id='spam', ctx=Load(), lineno=1, "
"col_offset=0), args=[Str(s='eggs', lineno=1, col_offset=0)], "
"col_offset=0), args=[Constant(value='eggs', lineno=1, col_offset=0)], "
"keywords=[], lineno=1, "
"col_offset=0), lineno=1, col_offset=0)])"
)
@ -490,16 +584,16 @@ class ASTHelpers_Test(unittest.TestCase):
src = ast.parse('1 + 1', mode='eval')
self.assertEqual(ast.increment_lineno(src, n=3), src)
self.assertEqual(ast.dump(src, include_attributes=True),
'Expression(body=BinOp(left=Num(n=1, lineno=4, col_offset=0), '
'op=Add(), right=Num(n=1, lineno=4, col_offset=4), lineno=4, '
'Expression(body=BinOp(left=Constant(value=1, lineno=4, col_offset=0), '
'op=Add(), right=Constant(value=1, lineno=4, col_offset=4), lineno=4, '
'col_offset=0))'
)
# issue10869: do not increment lineno of root twice
src = ast.parse('1 + 1', mode='eval')
self.assertEqual(ast.increment_lineno(src.body, n=3), src.body)
self.assertEqual(ast.dump(src, include_attributes=True),
'Expression(body=BinOp(left=Num(n=1, lineno=4, col_offset=0), '
'op=Add(), right=Num(n=1, lineno=4, col_offset=4), lineno=4, '
'Expression(body=BinOp(left=Constant(value=1, lineno=4, col_offset=0), '
'op=Add(), right=Constant(value=1, lineno=4, col_offset=4), lineno=4, '
'col_offset=0))'
)
@ -514,10 +608,10 @@ class ASTHelpers_Test(unittest.TestCase):
self.assertEqual(len(list(ast.iter_child_nodes(node.body))), 4)
iterator = ast.iter_child_nodes(node.body)
self.assertEqual(next(iterator).id, 'spam')
self.assertEqual(next(iterator).n, 23)
self.assertEqual(next(iterator).n, 42)
self.assertEqual(next(iterator).value, 23)
self.assertEqual(next(iterator).value, 42)
self.assertEqual(ast.dump(next(iterator)),
"keyword(arg='eggs', value=Str(s='leek'))"
"keyword(arg='eggs', value=Constant(value='leek'))"
)
def test_get_docstring(self):
@ -627,9 +721,11 @@ class ASTValidatorTests(unittest.TestCase):
def mod(self, mod, msg=None, mode="exec", *, exc=ValueError):
mod.lineno = mod.col_offset = 0
ast.fix_missing_locations(mod)
if msg is None:
compile(mod, "<test>", mode)
else:
with self.assertRaises(exc) as cm:
compile(mod, "<test>", mode)
if msg is not None:
self.assertIn(msg, str(cm.exception))
def expr(self, node, msg=None, *, exc=ValueError):
@ -927,9 +1023,9 @@ class ASTValidatorTests(unittest.TestCase):
comp = ast.Compare(left, [ast.In()], [ast.Num(4), ast.Num(5)])
self.expr(comp, "different number of comparators and operands")
comp = ast.Compare(ast.Num("blah"), [ast.In()], [left])
self.expr(comp, "non-numeric", exc=TypeError)
self.expr(comp)
comp = ast.Compare(left, [ast.In()], [ast.Num("blah")])
self.expr(comp, "non-numeric", exc=TypeError)
self.expr(comp)
def test_call(self):
func = ast.Name("x", ast.Load())
@ -950,8 +1046,10 @@ class ASTValidatorTests(unittest.TestCase):
pass
class subcomplex(complex):
pass
for obj in "0", "hello", subint(), subfloat(), subcomplex():
self.expr(ast.Num(obj), "non-numeric", exc=TypeError)
for obj in "0", "hello":
self.expr(ast.Num(obj))
for obj in subint(), subfloat(), subcomplex():
self.expr(ast.Num(obj), "invalid type", exc=TypeError)
def test_attribute(self):
attr = ast.Attribute(ast.Name("x", ast.Store()), "y", ast.Load())
@ -993,7 +1091,7 @@ class ASTValidatorTests(unittest.TestCase):
self._sequence(ast.Tuple)
def test_nameconstant(self):
self.expr(ast.NameConstant(4), "singleton must be True, False, or None")
self.expr(ast.NameConstant(4))
def test_stdlib_validates(self):
stdlib = os.path.dirname(ast.__file__)
@ -1140,35 +1238,35 @@ def main():
#### EVERYTHING BELOW IS GENERATED #####
exec_results = [
('Module', [('Expr', (1, 0), ('NameConstant', (1, 0), None))]),
('Module', [('Expr', (1, 0), ('Str', (1, 0), 'module docstring'))]),
('Module', [('Expr', (1, 0), ('Constant', (1, 0), None))]),
('Module', [('Expr', (1, 0), ('Constant', (1, 0), 'module docstring'))]),
('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [], None, [], [], None, []), [('Pass', (1, 9))], [], None)]),
('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [], None, [], [], None, []), [('Expr', (1, 9), ('Str', (1, 9), 'function docstring'))], [], None)]),
('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [], None, [], [], None, []), [('Expr', (1, 9), ('Constant', (1, 9), 'function docstring'))], [], None)]),
('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [('arg', (1, 6), 'a', None)], None, [], [], None, []), [('Pass', (1, 10))], [], None)]),
('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [('arg', (1, 6), 'a', None)], None, [], [], None, [('Num', (1, 8), 0)]), [('Pass', (1, 12))], [], None)]),
('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [('arg', (1, 6), 'a', None)], None, [], [], None, [('Constant', (1, 8), 0)]), [('Pass', (1, 12))], [], None)]),
('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [], ('arg', (1, 7), 'args', None), [], [], None, []), [('Pass', (1, 14))], [], None)]),
('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [], None, [], [], ('arg', (1, 8), 'kwargs', None), []), [('Pass', (1, 17))], [], None)]),
('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [('arg', (1, 6), 'a', None), ('arg', (1, 9), 'b', None), ('arg', (1, 14), 'c', None), ('arg', (1, 22), 'd', None), ('arg', (1, 28), 'e', None)], ('arg', (1, 35), 'args', None), [('arg', (1, 41), 'f', None)], [('Num', (1, 43), 42)], ('arg', (1, 49), 'kwargs', None), [('Num', (1, 11), 1), ('NameConstant', (1, 16), None), ('List', (1, 24), [], ('Load',)), ('Dict', (1, 30), [], [])]), [('Expr', (1, 58), ('Str', (1, 58), 'doc for f()'))], [], None)]),
('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [('arg', (1, 6), 'a', None), ('arg', (1, 9), 'b', None), ('arg', (1, 14), 'c', None), ('arg', (1, 22), 'd', None), ('arg', (1, 28), 'e', None)], ('arg', (1, 35), 'args', None), [('arg', (1, 41), 'f', None)], [('Constant', (1, 43), 42)], ('arg', (1, 49), 'kwargs', None), [('Constant', (1, 11), 1), ('Constant', (1, 16), None), ('List', (1, 24), [], ('Load',)), ('Dict', (1, 30), [], [])]), [('Expr', (1, 58), ('Constant', (1, 58), 'doc for f()'))], [], None)]),
('Module', [('ClassDef', (1, 0), 'C', [], [], [('Pass', (1, 8))], [])]),
('Module', [('ClassDef', (1, 0), 'C', [], [], [('Expr', (1, 9), ('Str', (1, 9), 'docstring for class C'))], [])]),
('Module', [('ClassDef', (1, 0), 'C', [], [], [('Expr', (1, 9), ('Constant', (1, 9), 'docstring for class C'))], [])]),
('Module', [('ClassDef', (1, 0), 'C', [('Name', (1, 8), 'object', ('Load',))], [], [('Pass', (1, 17))], [])]),
('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [], None, [], [], None, []), [('Return', (1, 8), ('Num', (1, 15), 1))], [], None)]),
('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [], None, [], [], None, []), [('Return', (1, 8), ('Constant', (1, 15), 1))], [], None)]),
('Module', [('Delete', (1, 0), [('Name', (1, 4), 'v', ('Del',))])]),
('Module', [('Assign', (1, 0), [('Name', (1, 0), 'v', ('Store',))], ('Num', (1, 4), 1))]),
('Module', [('AugAssign', (1, 0), ('Name', (1, 0), 'v', ('Store',)), ('Add',), ('Num', (1, 5), 1))]),
('Module', [('Assign', (1, 0), [('Name', (1, 0), 'v', ('Store',))], ('Constant', (1, 4), 1))]),
('Module', [('AugAssign', (1, 0), ('Name', (1, 0), 'v', ('Store',)), ('Add',), ('Constant', (1, 5), 1))]),
('Module', [('For', (1, 0), ('Name', (1, 4), 'v', ('Store',)), ('Name', (1, 9), 'v', ('Load',)), [('Pass', (1, 11))], [])]),
('Module', [('While', (1, 0), ('Name', (1, 6), 'v', ('Load',)), [('Pass', (1, 8))], [])]),
('Module', [('If', (1, 0), ('Name', (1, 3), 'v', ('Load',)), [('Pass', (1, 5))], [])]),
('Module', [('With', (1, 0), [('withitem', ('Name', (1, 5), 'x', ('Load',)), ('Name', (1, 10), 'y', ('Store',)))], [('Pass', (1, 13))])]),
('Module', [('With', (1, 0), [('withitem', ('Name', (1, 5), 'x', ('Load',)), ('Name', (1, 10), 'y', ('Store',))), ('withitem', ('Name', (1, 13), 'z', ('Load',)), ('Name', (1, 18), 'q', ('Store',)))], [('Pass', (1, 21))])]),
('Module', [('Raise', (1, 0), ('Call', (1, 6), ('Name', (1, 6), 'Exception', ('Load',)), [('Str', (1, 16), 'string')], []), None)]),
('Module', [('Raise', (1, 0), ('Call', (1, 6), ('Name', (1, 6), 'Exception', ('Load',)), [('Constant', (1, 16), 'string')], []), None)]),
('Module', [('Try', (1, 0), [('Pass', (2, 2))], [('ExceptHandler', (3, 0), ('Name', (3, 7), 'Exception', ('Load',)), None, [('Pass', (4, 2))])], [], [])]),
('Module', [('Try', (1, 0), [('Pass', (2, 2))], [], [], [('Pass', (4, 2))])]),
('Module', [('Assert', (1, 0), ('Name', (1, 7), 'v', ('Load',)), None)]),
('Module', [('Import', (1, 0), [('alias', 'sys', None)])]),
('Module', [('ImportFrom', (1, 0), 'sys', [('alias', 'v', None)], 0)]),
('Module', [('Global', (1, 0), ['v'])]),
('Module', [('Expr', (1, 0), ('Num', (1, 0), 1))]),
('Module', [('Expr', (1, 0), ('Constant', (1, 0), 1))]),
('Module', [('Pass', (1, 0))]),
('Module', [('For', (1, 0), ('Name', (1, 4), 'v', ('Store',)), ('Name', (1, 9), 'v', ('Load',)), [('Break', (1, 11))], [])]),
('Module', [('For', (1, 0), ('Name', (1, 4), 'v', ('Store',)), ('Name', (1, 9), 'v', ('Load',)), [('Continue', (1, 11))], [])]),
@ -1181,40 +1279,40 @@ exec_results = [
('Module', [('Expr', (1, 0), ('DictComp', (1, 0), ('Name', (1, 1), 'a', ('Load',)), ('Name', (1, 5), 'b', ('Load',)), [('comprehension', ('Tuple', (1, 11), [('Name', (1, 11), 'v', ('Store',)), ('Name', (1, 13), 'w', ('Store',))], ('Store',)), ('Name', (1, 18), 'x', ('Load',)), [], 0)]))]),
('Module', [('Expr', (1, 0), ('SetComp', (1, 0), ('Name', (1, 1), 'r', ('Load',)), [('comprehension', ('Name', (1, 7), 'l', ('Store',)), ('Name', (1, 12), 'x', ('Load',)), [('Name', (1, 17), 'g', ('Load',))], 0)]))]),
('Module', [('Expr', (1, 0), ('SetComp', (1, 0), ('Name', (1, 1), 'r', ('Load',)), [('comprehension', ('Tuple', (1, 7), [('Name', (1, 7), 'l', ('Store',)), ('Name', (1, 9), 'm', ('Store',))], ('Store',)), ('Name', (1, 14), 'x', ('Load',)), [], 0)]))]),
('Module', [('AsyncFunctionDef', (1, 0), 'f', ('arguments', [], None, [], [], None, []), [('Expr', (2, 1), ('Str', (2, 1), 'async function')), ('Expr', (3, 1), ('Await', (3, 1), ('Call', (3, 7), ('Name', (3, 7), 'something', ('Load',)), [], [])))], [], None)]),
('Module', [('AsyncFunctionDef', (1, 0), 'f', ('arguments', [], None, [], [], None, []), [('AsyncFor', (2, 1), ('Name', (2, 11), 'e', ('Store',)), ('Name', (2, 16), 'i', ('Load',)), [('Expr', (2, 19), ('Num', (2, 19), 1))], [('Expr', (3, 7), ('Num', (3, 7), 2))])], [], None)]),
('Module', [('AsyncFunctionDef', (1, 0), 'f', ('arguments', [], None, [], [], None, []), [('AsyncWith', (2, 1), [('withitem', ('Name', (2, 12), 'a', ('Load',)), ('Name', (2, 17), 'b', ('Store',)))], [('Expr', (2, 20), ('Num', (2, 20), 1))])], [], None)]),
('Module', [('Expr', (1, 0), ('Dict', (1, 0), [None, ('Num', (1, 10), 2)], [('Dict', (1, 3), [('Num', (1, 4), 1)], [('Num', (1, 6), 2)]), ('Num', (1, 12), 3)]))]),
('Module', [('Expr', (1, 0), ('Set', (1, 0), [('Starred', (1, 1), ('Set', (1, 2), [('Num', (1, 3), 1), ('Num', (1, 6), 2)]), ('Load',)), ('Num', (1, 10), 3)]))]),
('Module', [('AsyncFunctionDef', (1, 0), 'f', ('arguments', [], None, [], [], None, []), [('Expr', (2, 1), ('Constant', (2, 1), 'async function')), ('Expr', (3, 1), ('Await', (3, 1), ('Call', (3, 7), ('Name', (3, 7), 'something', ('Load',)), [], [])))], [], None)]),
('Module', [('AsyncFunctionDef', (1, 0), 'f', ('arguments', [], None, [], [], None, []), [('AsyncFor', (2, 1), ('Name', (2, 11), 'e', ('Store',)), ('Name', (2, 16), 'i', ('Load',)), [('Expr', (2, 19), ('Constant', (2, 19), 1))], [('Expr', (3, 7), ('Constant', (3, 7), 2))])], [], None)]),
('Module', [('AsyncFunctionDef', (1, 0), 'f', ('arguments', [], None, [], [], None, []), [('AsyncWith', (2, 1), [('withitem', ('Name', (2, 12), 'a', ('Load',)), ('Name', (2, 17), 'b', ('Store',)))], [('Expr', (2, 20), ('Constant', (2, 20), 1))])], [], None)]),
('Module', [('Expr', (1, 0), ('Dict', (1, 0), [None, ('Constant', (1, 10), 2)], [('Dict', (1, 3), [('Constant', (1, 4), 1)], [('Constant', (1, 6), 2)]), ('Constant', (1, 12), 3)]))]),
('Module', [('Expr', (1, 0), ('Set', (1, 0), [('Starred', (1, 1), ('Set', (1, 2), [('Constant', (1, 3), 1), ('Constant', (1, 6), 2)]), ('Load',)), ('Constant', (1, 10), 3)]))]),
('Module', [('AsyncFunctionDef', (1, 0), 'f', ('arguments', [], None, [], [], None, []), [('Expr', (2, 1), ('ListComp', (2, 2), ('Name', (2, 2), 'i', ('Load',)), [('comprehension', ('Name', (2, 14), 'b', ('Store',)), ('Name', (2, 19), 'c', ('Load',)), [], 1)]))], [], None)]),
]
single_results = [
('Interactive', [('Expr', (1, 0), ('BinOp', (1, 0), ('Num', (1, 0), 1), ('Add',), ('Num', (1, 2), 2)))]),
('Interactive', [('Expr', (1, 0), ('BinOp', (1, 0), ('Constant', (1, 0), 1), ('Add',), ('Constant', (1, 2), 2)))]),
]
eval_results = [
('Expression', ('NameConstant', (1, 0), None)),
('Expression', ('Constant', (1, 0), None)),
('Expression', ('BoolOp', (1, 0), ('And',), [('Name', (1, 0), 'a', ('Load',)), ('Name', (1, 6), 'b', ('Load',))])),
('Expression', ('BinOp', (1, 0), ('Name', (1, 0), 'a', ('Load',)), ('Add',), ('Name', (1, 4), 'b', ('Load',)))),
('Expression', ('UnaryOp', (1, 0), ('Not',), ('Name', (1, 4), 'v', ('Load',)))),
('Expression', ('Lambda', (1, 0), ('arguments', [], None, [], [], None, []), ('NameConstant', (1, 7), None))),
('Expression', ('Dict', (1, 0), [('Num', (1, 2), 1)], [('Num', (1, 4), 2)])),
('Expression', ('Lambda', (1, 0), ('arguments', [], None, [], [], None, []), ('Constant', (1, 7), None))),
('Expression', ('Dict', (1, 0), [('Constant', (1, 2), 1)], [('Constant', (1, 4), 2)])),
('Expression', ('Dict', (1, 0), [], [])),
('Expression', ('Set', (1, 0), [('NameConstant', (1, 1), None)])),
('Expression', ('Dict', (1, 0), [('Num', (2, 6), 1)], [('Num', (4, 10), 2)])),
('Expression', ('Set', (1, 0), [('Constant', (1, 1), None)])),
('Expression', ('Dict', (1, 0), [('Constant', (2, 6), 1)], [('Constant', (4, 10), 2)])),
('Expression', ('ListComp', (1, 1), ('Name', (1, 1), 'a', ('Load',)), [('comprehension', ('Name', (1, 7), 'b', ('Store',)), ('Name', (1, 12), 'c', ('Load',)), [('Name', (1, 17), 'd', ('Load',))], 0)])),
('Expression', ('GeneratorExp', (1, 1), ('Name', (1, 1), 'a', ('Load',)), [('comprehension', ('Name', (1, 7), 'b', ('Store',)), ('Name', (1, 12), 'c', ('Load',)), [('Name', (1, 17), 'd', ('Load',))], 0)])),
('Expression', ('Compare', (1, 0), ('Num', (1, 0), 1), [('Lt',), ('Lt',)], [('Num', (1, 4), 2), ('Num', (1, 8), 3)])),
('Expression', ('Call', (1, 0), ('Name', (1, 0), 'f', ('Load',)), [('Num', (1, 2), 1), ('Num', (1, 4), 2), ('Starred', (1, 10), ('Name', (1, 11), 'd', ('Load',)), ('Load',))], [('keyword', 'c', ('Num', (1, 8), 3)), ('keyword', None, ('Name', (1, 15), 'e', ('Load',)))])),
('Expression', ('Num', (1, 0), 10)),
('Expression', ('Str', (1, 0), 'string')),
('Expression', ('Compare', (1, 0), ('Constant', (1, 0), 1), [('Lt',), ('Lt',)], [('Constant', (1, 4), 2), ('Constant', (1, 8), 3)])),
('Expression', ('Call', (1, 0), ('Name', (1, 0), 'f', ('Load',)), [('Constant', (1, 2), 1), ('Constant', (1, 4), 2), ('Starred', (1, 10), ('Name', (1, 11), 'd', ('Load',)), ('Load',))], [('keyword', 'c', ('Constant', (1, 8), 3)), ('keyword', None, ('Name', (1, 15), 'e', ('Load',)))])),
('Expression', ('Constant', (1, 0), 10)),
('Expression', ('Constant', (1, 0), 'string')),
('Expression', ('Attribute', (1, 0), ('Name', (1, 0), 'a', ('Load',)), 'b', ('Load',))),
('Expression', ('Subscript', (1, 0), ('Name', (1, 0), 'a', ('Load',)), ('Slice', ('Name', (1, 2), 'b', ('Load',)), ('Name', (1, 4), 'c', ('Load',)), None), ('Load',))),
('Expression', ('Name', (1, 0), 'v', ('Load',))),
('Expression', ('List', (1, 0), [('Num', (1, 1), 1), ('Num', (1, 3), 2), ('Num', (1, 5), 3)], ('Load',))),
('Expression', ('List', (1, 0), [('Constant', (1, 1), 1), ('Constant', (1, 3), 2), ('Constant', (1, 5), 3)], ('Load',))),
('Expression', ('List', (1, 0), [], ('Load',))),
('Expression', ('Tuple', (1, 0), [('Num', (1, 0), 1), ('Num', (1, 2), 2), ('Num', (1, 4), 3)], ('Load',))),
('Expression', ('Tuple', (1, 1), [('Num', (1, 1), 1), ('Num', (1, 3), 2), ('Num', (1, 5), 3)], ('Load',))),
('Expression', ('Tuple', (1, 0), [('Constant', (1, 0), 1), ('Constant', (1, 2), 2), ('Constant', (1, 4), 3)], ('Load',))),
('Expression', ('Tuple', (1, 1), [('Constant', (1, 1), 1), ('Constant', (1, 3), 2), ('Constant', (1, 5), 3)], ('Load',))),
('Expression', ('Tuple', (1, 0), [], ('Load',))),
('Expression', ('Call', (1, 0), ('Attribute', (1, 0), ('Attribute', (1, 0), ('Attribute', (1, 0), ('Name', (1, 0), 'a', ('Load',)), 'b', ('Load',)), 'c', ('Load',)), 'd', ('Load',)), [('Subscript', (1, 8), ('Attribute', (1, 8), ('Name', (1, 8), 'a', ('Load',)), 'b', ('Load',)), ('Slice', ('Num', (1, 12), 1), ('Num', (1, 14), 2), None), ('Load',))], [])),
('Expression', ('Call', (1, 0), ('Attribute', (1, 0), ('Attribute', (1, 0), ('Attribute', (1, 0), ('Name', (1, 0), 'a', ('Load',)), 'b', ('Load',)), 'c', ('Load',)), 'd', ('Load',)), [('Subscript', (1, 8), ('Attribute', (1, 8), ('Name', (1, 8), 'a', ('Load',)), 'b', ('Load',)), ('Slice', ('Constant', (1, 12), 1), ('Constant', (1, 14), 2), None), ('Load',))], [])),
]
main()

24
Lib/test/test_fstring.py
View File

@ -116,9 +116,11 @@ f'eggs {a * x()} spam {b + y()}'"""
self.assertEqual(type(t.body[1]), ast.Expr)
self.assertEqual(type(t.body[1].value), ast.JoinedStr)
self.assertEqual(len(t.body[1].value.values), 4)
self.assertEqual(type(t.body[1].value.values[0]), ast.Str)
self.assertEqual(type(t.body[1].value.values[0]), ast.Constant)
self.assertEqual(type(t.body[1].value.values[0].value), str)
self.assertEqual(type(t.body[1].value.values[1]), ast.FormattedValue)
self.assertEqual(type(t.body[1].value.values[2]), ast.Str)
self.assertEqual(type(t.body[1].value.values[2]), ast.Constant)
self.assertEqual(type(t.body[1].value.values[2].value), str)
self.assertEqual(type(t.body[1].value.values[3]), ast.FormattedValue)
self.assertEqual(t.body[1].lineno, 3)
self.assertEqual(t.body[1].value.lineno, 3)
@ -183,9 +185,11 @@ f'{a * f"-{x()}-"}'"""
self.assertEqual(binop.right.col_offset, 7)
# check the nested call location
self.assertEqual(len(binop.right.values), 3)
self.assertEqual(type(binop.right.values[0]), ast.Str)
self.assertEqual(type(binop.right.values[0]), ast.Constant)
self.assertEqual(type(binop.right.values[0].value), str)
self.assertEqual(type(binop.right.values[1]), ast.FormattedValue)
self.assertEqual(type(binop.right.values[2]), ast.Str)
self.assertEqual(type(binop.right.values[2]), ast.Constant)
self.assertEqual(type(binop.right.values[2].value), str)
self.assertEqual(binop.right.values[0].lineno, 3)
self.assertEqual(binop.right.values[1].lineno, 3)
self.assertEqual(binop.right.values[2].lineno, 3)
@ -215,9 +219,11 @@ f'{a * x()} {a * x()} {a * x()}'
self.assertEqual(type(t.body[1].value), ast.JoinedStr)
self.assertEqual(len(t.body[1].value.values), 5)
self.assertEqual(type(t.body[1].value.values[0]), ast.FormattedValue)
self.assertEqual(type(t.body[1].value.values[1]), ast.Str)
self.assertEqual(type(t.body[1].value.values[1]), ast.Constant)
self.assertEqual(type(t.body[1].value.values[1].value), str)
self.assertEqual(type(t.body[1].value.values[2]), ast.FormattedValue)
self.assertEqual(type(t.body[1].value.values[3]), ast.Str)
self.assertEqual(type(t.body[1].value.values[3]), ast.Constant)
self.assertEqual(type(t.body[1].value.values[3].value), str)
self.assertEqual(type(t.body[1].value.values[4]), ast.FormattedValue)
self.assertEqual(t.body[1].lineno, 3)
self.assertEqual(t.body[1].value.lineno, 3)
@ -287,9 +293,11 @@ non-important content
self.assertEqual(type(t.body[1]), ast.Expr)
self.assertEqual(type(t.body[1].value), ast.JoinedStr)
self.assertEqual(len(t.body[1].value.values), 3)
self.assertEqual(type(t.body[1].value.values[0]), ast.Str)
self.assertEqual(type(t.body[1].value.values[0]), ast.Constant)
self.assertEqual(type(t.body[1].value.values[0].value), str)
self.assertEqual(type(t.body[1].value.values[1]), ast.FormattedValue)
self.assertEqual(type(t.body[1].value.values[2]), ast.Str)
self.assertEqual(type(t.body[1].value.values[2]), ast.Constant)
self.assertEqual(type(t.body[1].value.values[2].value), str)
# NOTE: the following invalid behavior is described in bpo-16806.
# - line number should be the *first* line (3), not the *last* (8)
# - column offset should not be -1

2
Lib/test/test_future.py
View File

@ -230,7 +230,7 @@ class AnnotationsFutureTestCase(unittest.TestCase):
eq("lukasz.langa.pl")
eq("call.me(maybe)")
eq("1 .real")
eq("1.0 .real")
eq("1.0.real")
eq("....__class__")
eq("list[str]")
eq("dict[str, int]")

3
Lib/test/test_pyclbr.py
View File

@ -144,7 +144,8 @@ class PyclbrTest(TestCase):
def test_easy(self):
self.checkModule('pyclbr')
self.checkModule('ast')
# XXX: Metaclasses are not supported
# self.checkModule('ast')
self.checkModule('doctest', ignore=("TestResults", "_SpoofOut",
"DocTestCase", '_DocTestSuite'))
self.checkModule('difflib', ignore=("Match",))

4
Misc/NEWS.d/next/Library/2018-09-20-17-35-05.bpo-32892.TOUBdg.rst Normal file
View File

@ -0,0 +1,4 @@
The parser now represents all constants as :class:`ast.Constant` instead of
using specific constant AST types (``Num``, ``Str``, ``Bytes``,
``NameConstant`` and ``Ellipsis``). These classes are considered deprecated
and will be removed in future Python versions.

12
Parser/Python.asdl
View File

@ -1,8 +1,5 @@
-- ASDL's 7 builtin types are:
-- identifier, int, string, bytes, object, singleton, constant
--
-- singleton: None, True or False
-- constant can be None, whereas None means "no value" for object.
-- ASDL's 5 builtin types are:
-- identifier, int, string, object, constant
module Python
{
@ -75,13 +72,8 @@ module Python
-- x < 4 < 3 and (x < 4) < 3
| Compare(expr left, cmpop* ops, expr* comparators)
| Call(expr func, expr* args, keyword* keywords)
| Num(object n) -- a number as a PyObject.
| Str(string s) -- need to specify raw, unicode, etc?
| FormattedValue(expr value, int? conversion, expr? format_spec)
| JoinedStr(expr* values)
| Bytes(bytes s)
| NameConstant(singleton value)
| Ellipsis
| Constant(constant value)
-- the following expression can appear in assignment context

31
Parser/asdl_c.py
View File

@ -855,17 +855,6 @@ static PyObject* ast2obj_int(long b)
/* Conversion Python -> AST */
static int obj2ast_singleton(PyObject *obj, PyObject** out, PyArena* arena)
{
if (obj != Py_None && obj != Py_True && obj != Py_False) {
PyErr_SetString(PyExc_ValueError,
"AST singleton must be True, False, or None");
return 1;
}
*out = obj;
return 0;
}
static int obj2ast_object(PyObject* obj, PyObject** out, PyArena* arena)
{
if (obj == Py_None)
@ -883,13 +872,11 @@ static int obj2ast_object(PyObject* obj, PyObject** out, PyArena* arena)
static int obj2ast_constant(PyObject* obj, PyObject** out, PyArena* arena)
{
if (obj) {
if (PyArena_AddPyObject(arena, obj) < 0) {
*out = NULL;
return -1;
}
Py_INCREF(obj);
}
*out = obj;
return 0;
}
@ -903,24 +890,6 @@ static int obj2ast_identifier(PyObject* obj, PyObject** out, PyArena* arena)
return obj2ast_object(obj, out, arena);
}
static int obj2ast_string(PyObject* obj, PyObject** out, PyArena* arena)
{
if (!PyUnicode_CheckExact(obj) && !PyBytes_CheckExact(obj)) {
PyErr_SetString(PyExc_TypeError, "AST string must be of type str");
return 1;
}
return obj2ast_object(obj, out, arena);
}
static int obj2ast_bytes(PyObject* obj, PyObject** out, PyArena* arena)
{
if (!PyBytes_CheckExact(obj)) {
PyErr_SetString(PyExc_TypeError, "AST bytes must be of type bytes");
return 1;
}
return obj2ast_object(obj, out, arena);
}
static int obj2ast_int(PyObject* obj, int* out, PyArena* arena)
{
int i;

304
Python/Python-ast.c generated
View File

@ -284,16 +284,6 @@ static char *Call_fields[]={
"args",
"keywords",
};
static PyTypeObject *Num_type;
_Py_IDENTIFIER(n);
static char *Num_fields[]={
"n",
};
static PyTypeObject *Str_type;
_Py_IDENTIFIER(s);
static char *Str_fields[]={
"s",
};
static PyTypeObject *FormattedValue_type;
_Py_IDENTIFIER(conversion);
_Py_IDENTIFIER(format_spec);
@ -306,15 +296,6 @@ static PyTypeObject *JoinedStr_type;
static char *JoinedStr_fields[]={
"values",
};
static PyTypeObject *Bytes_type;
static char *Bytes_fields[]={
"s",
};
static PyTypeObject *NameConstant_type;
static char *NameConstant_fields[]={
"value",
};
static PyTypeObject *Ellipsis_type;
static PyTypeObject *Constant_type;
static char *Constant_fields[]={
"value",
@ -736,17 +717,6 @@ static PyObject* ast2obj_int(long b)
/* Conversion Python -> AST */
static int obj2ast_singleton(PyObject *obj, PyObject** out, PyArena* arena)
{
if (obj != Py_None && obj != Py_True && obj != Py_False) {
PyErr_SetString(PyExc_ValueError,
"AST singleton must be True, False, or None");
return 1;
}
*out = obj;
return 0;
}
static int obj2ast_object(PyObject* obj, PyObject** out, PyArena* arena)
{
if (obj == Py_None)
@ -764,13 +734,11 @@ static int obj2ast_object(PyObject* obj, PyObject** out, PyArena* arena)
static int obj2ast_constant(PyObject* obj, PyObject** out, PyArena* arena)
{
if (obj) {
if (PyArena_AddPyObject(arena, obj) < 0) {
*out = NULL;
return -1;
}
Py_INCREF(obj);
}
*out = obj;
return 0;
}
@ -784,24 +752,6 @@ static int obj2ast_identifier(PyObject* obj, PyObject** out, PyArena* arena)
return obj2ast_object(obj, out, arena);
}
static int obj2ast_string(PyObject* obj, PyObject** out, PyArena* arena)
{
if (!PyUnicode_CheckExact(obj) && !PyBytes_CheckExact(obj)) {
PyErr_SetString(PyExc_TypeError, "AST string must be of type str");
return 1;
}
return obj2ast_object(obj, out, arena);
}
static int obj2ast_bytes(PyObject* obj, PyObject** out, PyArena* arena)
{
if (!PyBytes_CheckExact(obj)) {
PyErr_SetString(PyExc_TypeError, "AST bytes must be of type bytes");
return 1;
}
return obj2ast_object(obj, out, arena);
}
static int obj2ast_int(PyObject* obj, int* out, PyArena* arena)
{
int i;
@ -943,22 +893,11 @@ static int init_types(void)
if (!Compare_type) return 0;
Call_type = make_type("Call", expr_type, Call_fields, 3);
if (!Call_type) return 0;
Num_type = make_type("Num", expr_type, Num_fields, 1);
if (!Num_type) return 0;
Str_type = make_type("Str", expr_type, Str_fields, 1);
if (!Str_type) return 0;
FormattedValue_type = make_type("FormattedValue", expr_type,
FormattedValue_fields, 3);
if (!FormattedValue_type) return 0;
JoinedStr_type = make_type("JoinedStr", expr_type, JoinedStr_fields, 1);
if (!JoinedStr_type) return 0;
Bytes_type = make_type("Bytes", expr_type, Bytes_fields, 1);
if (!Bytes_type) return 0;
NameConstant_type = make_type("NameConstant", expr_type,
NameConstant_fields, 1);
if (!NameConstant_type) return 0;
Ellipsis_type = make_type("Ellipsis", expr_type, NULL, 0);
if (!Ellipsis_type) return 0;
Constant_type = make_type("Constant", expr_type, Constant_fields, 1);
if (!Constant_type) return 0;
Attribute_type = make_type("Attribute", expr_type, Attribute_fields, 3);
@ -2089,44 +2028,6 @@ Call(expr_ty func, asdl_seq * args, asdl_seq * keywords, int lineno, int
return p;
}
expr_ty
Num(object n, int lineno, int col_offset, PyArena *arena)
{
expr_ty p;
if (!n) {
PyErr_SetString(PyExc_ValueError,
"field n is required for Num");
return NULL;
}
p = (expr_ty)PyArena_Malloc(arena, sizeof(*p));
if (!p)
return NULL;
p->kind = Num_kind;
p->v.Num.n = n;
p->lineno = lineno;
p->col_offset = col_offset;
return p;
}
expr_ty
Str(string s, int lineno, int col_offset, PyArena *arena)
{
expr_ty p;
if (!s) {
PyErr_SetString(PyExc_ValueError,
"field s is required for Str");
return NULL;
}
p = (expr_ty)PyArena_Malloc(arena, sizeof(*p));
if (!p)
return NULL;
p->kind = Str_kind;
p->v.Str.s = s;
p->lineno = lineno;
p->col_offset = col_offset;
return p;
}
expr_ty
FormattedValue(expr_ty value, int conversion, expr_ty format_spec, int lineno,
int col_offset, PyArena *arena)
@ -2163,57 +2064,6 @@ JoinedStr(asdl_seq * values, int lineno, int col_offset, PyArena *arena)
return p;
}
expr_ty
Bytes(bytes s, int lineno, int col_offset, PyArena *arena)
{
expr_ty p;
if (!s) {
PyErr_SetString(PyExc_ValueError,
"field s is required for Bytes");
return NULL;
}
p = (expr_ty)PyArena_Malloc(arena, sizeof(*p));
if (!p)
return NULL;
p->kind = Bytes_kind;
p->v.Bytes.s = s;
p->lineno = lineno;
p->col_offset = col_offset;
return p;
}
expr_ty
NameConstant(singleton value, int lineno, int col_offset, PyArena *arena)
{
expr_ty p;
if (!value) {
PyErr_SetString(PyExc_ValueError,
"field value is required for NameConstant");
return NULL;
}
p = (expr_ty)PyArena_Malloc(arena, sizeof(*p));
if (!p)
return NULL;
p->kind = NameConstant_kind;
p->v.NameConstant.value = value;
p->lineno = lineno;
p->col_offset = col_offset;
return p;
}
expr_ty
Ellipsis(int lineno, int col_offset, PyArena *arena)
{
expr_ty p;
p = (expr_ty)PyArena_Malloc(arena, sizeof(*p));
if (!p)
return NULL;
p->kind = Ellipsis_kind;
p->lineno = lineno;
p->col_offset = col_offset;
return p;
}
expr_ty
Constant(constant value, int lineno, int col_offset, PyArena *arena)
{
@ -3289,24 +3139,6 @@ ast2obj_expr(void* _o)
goto failed;
Py_DECREF(value);
break;
case Num_kind:
result = PyType_GenericNew(Num_type, NULL, NULL);
if (!result) goto failed;
value = ast2obj_object(o->v.Num.n);
if (!value) goto failed;
if (_PyObject_SetAttrId(result, &PyId_n, value) == -1)
goto failed;
Py_DECREF(value);
break;
case Str_kind:
result = PyType_GenericNew(Str_type, NULL, NULL);
if (!result) goto failed;
value = ast2obj_string(o->v.Str.s);
if (!value) goto failed;
if (_PyObject_SetAttrId(result, &PyId_s, value) == -1)
goto failed;
Py_DECREF(value);
break;
case FormattedValue_kind:
result = PyType_GenericNew(FormattedValue_type, NULL, NULL);
if (!result) goto failed;
@ -3335,28 +3167,6 @@ ast2obj_expr(void* _o)
goto failed;
Py_DECREF(value);
break;
case Bytes_kind:
result = PyType_GenericNew(Bytes_type, NULL, NULL);
if (!result) goto failed;
value = ast2obj_bytes(o->v.Bytes.s);
if (!value) goto failed;
if (_PyObject_SetAttrId(result, &PyId_s, value) == -1)
goto failed;
Py_DECREF(value);
break;
case NameConstant_kind:
result = PyType_GenericNew(NameConstant_type, NULL, NULL);
if (!result) goto failed;
value = ast2obj_singleton(o->v.NameConstant.value);
if (!value) goto failed;
if (_PyObject_SetAttrId(result, &PyId_value, value) == -1)
goto failed;
Py_DECREF(value);
break;
case Ellipsis_kind:
result = PyType_GenericNew(Ellipsis_type, NULL, NULL);
if (!result) goto failed;
break;
case Constant_kind:
result = PyType_GenericNew(Constant_type, NULL, NULL);
if (!result) goto failed;
@ -6606,54 +6416,6 @@ obj2ast_expr(PyObject* obj, expr_ty* out, PyArena* arena)
if (*out == NULL) goto failed;
return 0;
}
isinstance = PyObject_IsInstance(obj, (PyObject*)Num_type);
if (isinstance == -1) {
return 1;
}
if (isinstance) {
object n;
if (_PyObject_LookupAttrId(obj, &PyId_n, &tmp) < 0) {
return 1;
}
if (tmp == NULL) {
PyErr_SetString(PyExc_TypeError, "required field \"n\" missing from Num");
return 1;
}
else {
int res;
res = obj2ast_object(tmp, &n, arena);
if (res != 0) goto failed;
Py_CLEAR(tmp);
}
*out = Num(n, lineno, col_offset, arena);
if (*out == NULL) goto failed;
return 0;
}
isinstance = PyObject_IsInstance(obj, (PyObject*)Str_type);
if (isinstance == -1) {
return 1;
}
if (isinstance) {
string s;
if (_PyObject_LookupAttrId(obj, &PyId_s, &tmp) < 0) {
return 1;
}
if (tmp == NULL) {
PyErr_SetString(PyExc_TypeError, "required field \"s\" missing from Str");
return 1;
}
else {
int res;
res = obj2ast_string(tmp, &s, arena);
if (res != 0) goto failed;
Py_CLEAR(tmp);
}
*out = Str(s, lineno, col_offset, arena);
if (*out == NULL) goto failed;
return 0;
}
isinstance = PyObject_IsInstance(obj, (PyObject*)FormattedValue_type);
if (isinstance == -1) {
return 1;
@ -6748,64 +6510,6 @@ obj2ast_expr(PyObject* obj, expr_ty* out, PyArena* arena)
if (*out == NULL) goto failed;
return 0;
}
isinstance = PyObject_IsInstance(obj, (PyObject*)Bytes_type);
if (isinstance == -1) {
return 1;
}
if (isinstance) {
bytes s;
if (_PyObject_LookupAttrId(obj, &PyId_s, &tmp) < 0) {
return 1;
}
if (tmp == NULL) {
PyErr_SetString(PyExc_TypeError, "required field \"s\" missing from Bytes");
return 1;
}
else {
int res;
res = obj2ast_bytes(tmp, &s, arena);
if (res != 0) goto failed;
Py_CLEAR(tmp);
}
*out = Bytes(s, lineno, col_offset, arena);
if (*out == NULL) goto failed;
return 0;
}
isinstance = PyObject_IsInstance(obj, (PyObject*)NameConstant_type);
if (isinstance == -1) {
return 1;
}
if (isinstance) {
singleton value;
if (_PyObject_LookupAttrId(obj, &PyId_value, &tmp) < 0) {
return 1;
}
if (tmp == NULL) {
PyErr_SetString(PyExc_TypeError, "required field \"value\" missing from NameConstant");
return 1;
}
else {
int res;
res = obj2ast_singleton(tmp, &value, arena);
if (res != 0) goto failed;
Py_CLEAR(tmp);
}
*out = NameConstant(value, lineno, col_offset, arena);
if (*out == NULL) goto failed;
return 0;
}
isinstance = PyObject_IsInstance(obj, (PyObject*)Ellipsis_type);
if (isinstance == -1) {
return 1;
}
if (isinstance) {
*out = Ellipsis(lineno, col_offset, arena);
if (*out == NULL) goto failed;
return 0;
}
isinstance = PyObject_IsInstance(obj, (PyObject*)Constant_type);
if (isinstance == -1) {
return 1;
@ -8244,18 +7948,10 @@ PyInit__ast(void)
if (PyDict_SetItemString(d, "Compare", (PyObject*)Compare_type) < 0) return
NULL;
if (PyDict_SetItemString(d, "Call", (PyObject*)Call_type) < 0) return NULL;
if (PyDict_SetItemString(d, "Num", (PyObject*)Num_type) < 0) return NULL;
if (PyDict_SetItemString(d, "Str", (PyObject*)Str_type) < 0) return NULL;
if (PyDict_SetItemString(d, "FormattedValue",
(PyObject*)FormattedValue_type) < 0) return NULL;
if (PyDict_SetItemString(d, "JoinedStr", (PyObject*)JoinedStr_type) < 0)
return NULL;
if (PyDict_SetItemString(d, "Bytes", (PyObject*)Bytes_type) < 0) return
NULL;
if (PyDict_SetItemString(d, "NameConstant", (PyObject*)NameConstant_type) <
0) return NULL;
if (PyDict_SetItemString(d, "Ellipsis", (PyObject*)Ellipsis_type) < 0)
return NULL;
if (PyDict_SetItemString(d, "Constant", (PyObject*)Constant_type) < 0)
return NULL;
if (PyDict_SetItemString(d, "Attribute", (PyObject*)Attribute_type) < 0)

78
Python/ast.c
View File

@ -295,23 +295,6 @@ validate_expr(expr_ty exp, expr_context_ty ctx)
return 0;
}
return 1;
case Num_kind: {
PyObject *n = exp->v.Num.n;
if (!PyLong_CheckExact(n) && !PyFloat_CheckExact(n) &&
!PyComplex_CheckExact(n)) {
PyErr_SetString(PyExc_TypeError, "non-numeric type in Num");
return 0;
}
return 1;
}
case Str_kind: {
PyObject *s = exp->v.Str.s;
if (!PyUnicode_CheckExact(s)) {
PyErr_SetString(PyExc_TypeError, "non-string type in Str");
return 0;
}
return 1;
}
case JoinedStr_kind:
return validate_exprs(exp->v.JoinedStr.values, Load, 0);
case FormattedValue_kind:
@ -320,14 +303,6 @@ validate_expr(expr_ty exp, expr_context_ty ctx)
if (exp->v.FormattedValue.format_spec)
return validate_expr(exp->v.FormattedValue.format_spec, Load);
return 1;
case Bytes_kind: {
PyObject *b = exp->v.Bytes.s;
if (!PyBytes_CheckExact(b)) {
PyErr_SetString(PyExc_TypeError, "non-bytes type in Bytes");
return 0;
}
return 1;
}
case Attribute_kind:
return validate_expr(exp->v.Attribute.value, Load);
case Subscript_kind:
@ -339,10 +314,8 @@ validate_expr(expr_ty exp, expr_context_ty ctx)
return validate_exprs(exp->v.List.elts, ctx, 0);
case Tuple_kind:
return validate_exprs(exp->v.Tuple.elts, ctx, 0);
/* These last cases don't have any checking. */
/* This last case doesn't have any checking. */
case Name_kind:
case NameConstant_kind:
case Ellipsis_kind:
return 1;
default:
PyErr_SetString(PyExc_SystemError, "unexpected expression");
@ -1040,19 +1013,23 @@ set_context(struct compiling *c, expr_ty e, expr_context_ty ctx, const node *n)
break;
case Dict_kind:
case Set_kind:
case Num_kind:
case Str_kind:
case Bytes_kind:
case JoinedStr_kind:
case FormattedValue_kind:
expr_name = "literal";
break;
case NameConstant_kind:
case Constant_kind: {
PyObject *value = e->v.Constant.value;
if (value == Py_None || value == Py_False || value == Py_True) {
expr_name = "keyword";
break;
case Ellipsis_kind:
}
else if (value == Py_Ellipsis) {
expr_name = "Ellipsis";
}
else {
expr_name = "literal";
}
break;
}
case Compare_kind:
expr_name = "comparison";
break;
@ -2091,11 +2068,11 @@ ast_for_atom(struct compiling *c, const node *n)
size_t len = strlen(s);
if (len >= 4 && len <= 5) {
if (!strcmp(s, "None"))
return NameConstant(Py_None, LINENO(n), n->n_col_offset, c->c_arena);
return Constant(Py_None, LINENO(n), n->n_col_offset, c->c_arena);
if (!strcmp(s, "True"))
return NameConstant(Py_True, LINENO(n), n->n_col_offset, c->c_arena);
return Constant(Py_True, LINENO(n), n->n_col_offset, c->c_arena);
if (!strcmp(s, "False"))
return NameConstant(Py_False, LINENO(n), n->n_col_offset, c->c_arena);
return Constant(Py_False, LINENO(n), n->n_col_offset, c->c_arena);
}
name = new_identifier(s, c);
if (!name)
@ -2144,10 +2121,10 @@ ast_for_atom(struct compiling *c, const node *n)
Py_DECREF(pynum);
return NULL;
}
return Num(pynum, LINENO(n), n->n_col_offset, c->c_arena);
return Constant(pynum, LINENO(n), n->n_col_offset, c->c_arena);
}
case ELLIPSIS: /* Ellipsis */
return Ellipsis(LINENO(n), n->n_col_offset, c->c_arena);
return Constant(Py_Ellipsis, LINENO(n), n->n_col_offset, c->c_arena);
case LPAR: /* some parenthesized expressions */
ch = CHILD(n, 1);
@ -4751,7 +4728,7 @@ typedef struct {
expr_ty's, and then after that start dynamically allocating,
doubling the number allocated each time. Note that the f-string
f'{0}a{1}' contains 3 expr_ty's: 2 FormattedValue's, and one
Str for the literal 'a'. So you add expr_ty's about twice as
Constant for the literal 'a'. So you add expr_ty's about twice as
fast as you add exressions in an f-string. */
Py_ssize_t allocated; /* Number we've allocated. */
@ -4903,7 +4880,7 @@ FstringParser_Dealloc(FstringParser *state)
ExprList_Dealloc(&state->expr_list);
}
/* Make a Str node, but decref the PyUnicode object being added. */
/* Make a Constant node, but decref the PyUnicode object being added. */
static expr_ty
make_str_node_and_del(PyObject **str, struct compiling *c, const node* n)
{
@ -4914,7 +4891,7 @@ make_str_node_and_del(PyObject **str, struct compiling *c, const node* n)
Py_DECREF(s);
return NULL;
}
return Str(s, LINENO(n), n->n_col_offset, c->c_arena);
return Constant(s, LINENO(n), n->n_col_offset, c->c_arena);
}
/* Add a non-f-string (that is, a regular literal string). str is
@ -5002,11 +4979,11 @@ FstringParser_ConcatFstring(FstringParser *state, const char **str,
break;
/* We know we have an expression. Convert any existing string
to a Str node. */
to a Constant node. */
if (!state->last_str) {
/* Do nothing. No previous literal. */
} else {
/* Convert the existing last_str literal to a Str node. */
/* Convert the existing last_str literal to a Constant node. */
expr_ty str = make_str_node_and_del(&state->last_str, c, n);
if (!str || ExprList_Append(&state->expr_list, str) < 0)
return -1;
@ -5033,7 +5010,7 @@ FstringParser_ConcatFstring(FstringParser *state, const char **str,
}
/* Convert the partial state reflected in last_str and expr_list to an
expr_ty. The expr_ty can be a Str, or a JoinedStr. */
expr_ty. The expr_ty can be a Constant, or a JoinedStr. */
static expr_ty
FstringParser_Finish(FstringParser *state, struct compiling *c,
const node *n)
@ -5055,7 +5032,7 @@ FstringParser_Finish(FstringParser *state, struct compiling *c,
return make_str_node_and_del(&state->last_str, c, n);
}
/* Create a Str node out of last_str, if needed. It will be the
/* Create a Constant node out of last_str, if needed. It will be the
last node in our expression list. */
if (state->last_str) {
expr_ty str = make_str_node_and_del(&state->last_str, c, n);
@ -5206,9 +5183,9 @@ parsestr(struct compiling *c, const node *n, int *bytesmode, int *rawmode,
/* Accepts a STRING+ atom, and produces an expr_ty node. Run through
each STRING atom, and process it as needed. For bytes, just
concatenate them together, and the result will be a Bytes node. For
concatenate them together, and the result will be a Constant node. For
normal strings and f-strings, concatenate them together. The result
will be a Str node if there were no f-strings; a FormattedValue
will be a Constant node if there were no f-strings; a FormattedValue
node if there's just an f-string (with no leading or trailing
literals), or a JoinedStr node if there are multiple f-strings or
any literals involved. */
@ -5279,7 +5256,7 @@ parsestrplus(struct compiling *c, const node *n)
/* Just return the bytes object and we're done. */
if (PyArena_AddPyObject(c->c_arena, bytes_str) < 0)
goto error;
return Bytes(bytes_str, LINENO(n), n->n_col_offset, c->c_arena);
return Constant(bytes_str, LINENO(n), n->n_col_offset, c->c_arena);
}
/* We're not a bytes string, bytes_str should never have been set. */
@ -5304,9 +5281,6 @@ _PyAST_GetDocString(asdl_seq *body)
return NULL;
}
expr_ty e = st->v.Expr.value;
if (e->kind == Str_kind) {
return e->v.Str.s;
}
if (e->kind == Constant_kind && PyUnicode_CheckExact(e->v.Constant.value)) {
return e->v.Constant.value;
}

61
Python/ast_opt.c
View File

@ -5,47 +5,6 @@
#include "ast.h"
/* TODO: is_const and get_const_value are copied from Python/compile.c.
It should be deduped in the future. Maybe, we can include this file
from compile.c?
*/
static int
is_const(expr_ty e)
{
switch (e->kind) {
case Constant_kind:
case Num_kind:
case Str_kind:
case Bytes_kind:
case Ellipsis_kind:
case NameConstant_kind:
return 1;
default:
return 0;
}
}
static PyObject *
get_const_value(expr_ty e)
{
switch (e->kind) {
case Constant_kind:
return e->v.Constant.value;
case Num_kind:
return e->v.Num.n;
case Str_kind:
return e->v.Str.s;
case Bytes_kind:
return e->v.Bytes.s;
case Ellipsis_kind:
return Py_Ellipsis;
case NameConstant_kind:
return e->v.NameConstant.value;
default:
Py_UNREACHABLE();
}
}
static int
make_const(expr_ty node, PyObject *val, PyArena *arena)
{
@ -81,7 +40,7 @@ fold_unaryop(expr_ty node, PyArena *arena, int optimize)
{
expr_ty arg = node->v.UnaryOp.operand;
if (!is_const(arg)) {
if (arg->kind != Constant_kind) {
/* Fold not into comparison */
if (node->v.UnaryOp.op == Not && arg->kind == Compare_kind &&
asdl_seq_LEN(arg->v.Compare.ops) == 1) {
@ -123,7 +82,7 @@ fold_unaryop(expr_ty node, PyArena *arena, int optimize)
[UAdd] = PyNumber_Positive,
[USub] = PyNumber_Negative,
};
PyObject *newval = ops[node->v.UnaryOp.op](get_const_value(arg));
PyObject *newval = ops[node->v.UnaryOp.op](arg->v.Constant.value);
return make_const(node, newval, arena);
}
@ -259,12 +218,12 @@ fold_binop(expr_ty node, PyArena *arena, int optimize)
expr_ty lhs, rhs;
lhs = node->v.BinOp.left;
rhs = node->v.BinOp.right;
if (!is_const(lhs) || !is_const(rhs)) {
if (lhs->kind != Constant_kind || rhs->kind != Constant_kind) {
return 1;
}
PyObject *lv = get_const_value(lhs);
PyObject *rv = get_const_value(rhs);
PyObject *lv = lhs->v.Constant.value;
PyObject *rv = rhs->v.Constant.value;
PyObject *newval;
switch (node->v.BinOp.op) {
@ -316,7 +275,7 @@ make_const_tuple(asdl_seq *elts)
{
for (int i = 0; i < asdl_seq_LEN(elts); i++) {
expr_ty e = (expr_ty)asdl_seq_GET(elts, i);
if (!is_const(e)) {
if (e->kind != Constant_kind) {
return NULL;
}
}
@ -328,7 +287,7 @@ make_const_tuple(asdl_seq *elts)
for (int i = 0; i < asdl_seq_LEN(elts); i++) {
expr_ty e = (expr_ty)asdl_seq_GET(elts, i);
PyObject *v = get_const_value(e);
PyObject *v = e->v.Constant.value;
Py_INCREF(v);
PyTuple_SET_ITEM(newval, i, v);
}
@ -357,16 +316,16 @@ fold_subscr(expr_ty node, PyArena *arena, int optimize)
arg = node->v.Subscript.value;
slice = node->v.Subscript.slice;
if (node->v.Subscript.ctx != Load ||
!is_const(arg) ||
arg->kind != Constant_kind ||
/* TODO: handle other types of slices */
slice->kind != Index_kind ||
!is_const(slice->v.Index.value))
slice->v.Index.value->kind != Constant_kind)
{
return 1;
}
idx = slice->v.Index.value;
newval = PyObject_GetItem(get_const_value(arg), get_const_value(idx));
newval = PyObject_GetItem(arg->v.Constant.value, idx->v.Constant.value);
return make_const(node, newval, arena);
}

24
Python/ast_unparse.c
View File

@ -567,8 +567,6 @@ append_fstring_element(_PyUnicodeWriter *writer, expr_ty e, bool is_format_spec)
switch (e->kind) {
case Constant_kind:
return append_fstring_unicode(writer, e->v.Constant.value);
case Str_kind:
return append_fstring_unicode(writer, e->v.Str.s);
case JoinedStr_kind:
return append_joinedstr(writer, e, is_format_spec);
case FormattedValue_kind:
@ -690,13 +688,12 @@ static int
append_ast_attribute(_PyUnicodeWriter *writer, expr_ty e)
{
const char *period;
APPEND_EXPR(e->v.Attribute.value, PR_ATOM);
expr_ty v = e->v.Attribute.value;
APPEND_EXPR(v, PR_ATOM);
/* Special case: integers require a space for attribute access to be
unambiguous. Floats and complex numbers don't but work with it, too. */
if (e->v.Attribute.value->kind == Num_kind ||
e->v.Attribute.value->kind == Constant_kind)
{
unambiguous. */
if (v->kind == Constant_kind && PyLong_CheckExact(v->v.Constant.value)) {
period = " .";
}
else {
@ -841,21 +838,14 @@ append_ast_expr(_PyUnicodeWriter *writer, expr_ty e, int level)
case Call_kind:
return append_ast_call(writer, e);
case Constant_kind:
if (e->v.Constant.value == Py_Ellipsis) {
APPEND_STR_FINISH("...");
}
return append_repr(writer, e->v.Constant.value);
case Num_kind:
return append_repr(writer, e->v.Num.n);
case Str_kind:
return append_repr(writer, e->v.Str.s);
case JoinedStr_kind:
return append_joinedstr(writer, e, false);
case FormattedValue_kind:
return append_formattedvalue(writer, e, false);
case Bytes_kind:
return append_repr(writer, e->v.Bytes.s);
case Ellipsis_kind:
APPEND_STR_FINISH("...");
case NameConstant_kind:
return append_repr(writer, e->v.NameConstant.value);
/* The following exprs can be assignment targets. */
case Attribute_kind:
return append_ast_attribute(writer, e);

64
Python/compile.c
View File

@ -1398,43 +1398,6 @@ compiler_addop_j(struct compiler *c, int opcode, basicblock *b, int absolute)
} \
}
static int
is_const(expr_ty e)
{
switch (e->kind) {
case Constant_kind:
case Num_kind:
case Str_kind:
case Bytes_kind:
case Ellipsis_kind:
case NameConstant_kind:
return 1;
default:
return 0;
}
}
static PyObject *
get_const_value(expr_ty e)
{
switch (e->kind) {
case Constant_kind:
return e->v.Constant.value;
case Num_kind:
return e->v.Num.n;
case Str_kind:
return e->v.Str.s;
case Bytes_kind:
return e->v.Bytes.s;
case Ellipsis_kind:
return Py_Ellipsis;
case NameConstant_kind:
return e->v.NameConstant.value;
default:
Py_UNREACHABLE();
}
}
/* Search if variable annotations are present statically in a block. */
static int
@ -2568,7 +2531,7 @@ static int
compiler_return(struct compiler *c, stmt_ty s)
{
int preserve_tos = ((s->v.Return.value != NULL) &&
!is_const(s->v.Return.value));
(s->v.Return.value->kind != Constant_kind));
if (c->u->u_ste->ste_type != FunctionBlock)
return compiler_error(c, "'return' outside function");
if (s->v.Return.value != NULL &&
@ -3054,7 +3017,7 @@ compiler_visit_stmt_expr(struct compiler *c, expr_ty value)
return 1;
}
if (is_const(value)) {
if (value->kind == Constant_kind) {
/* ignore constant statement */
return 1;
}
@ -3502,7 +3465,7 @@ are_all_items_const(asdl_seq *seq, Py_ssize_t begin, Py_ssize_t end)
Py_ssize_t i;
for (i = begin; i < end; i++) {
expr_ty key = (expr_ty)asdl_seq_GET(seq, i);
if (key == NULL || !is_const(key))
if (key == NULL || key->kind != Constant_kind)
return 0;
}
return 1;
@ -3522,7 +3485,7 @@ compiler_subdict(struct compiler *c, expr_ty e, Py_ssize_t begin, Py_ssize_t end
return 0;
}
for (i = begin; i < end; i++) {
key = get_const_value((expr_ty)asdl_seq_GET(e->v.Dict.keys, i));
key = ((expr_ty)asdl_seq_GET(e->v.Dict.keys, i))->v.Constant.value;
Py_INCREF(key);
PyTuple_SET_ITEM(keys, i - begin, key);
}
@ -4244,8 +4207,8 @@ compiler_visit_keyword(struct compiler *c, keyword_ty k)
static int
expr_constant(expr_ty e)
{
if (is_const(e)) {
return PyObject_IsTrue(get_const_value(e));
if (e->kind == Constant_kind) {
return PyObject_IsTrue(e->v.Constant.value);
}
return -1;
}
@ -4505,25 +4468,10 @@ compiler_visit_expr1(struct compiler *c, expr_ty e)
case Constant_kind:
ADDOP_LOAD_CONST(c, e->v.Constant.value);
break;
case Num_kind:
ADDOP_LOAD_CONST(c, e->v.Num.n);
break;
case Str_kind:
ADDOP_LOAD_CONST(c, e->v.Str.s);
break;
case JoinedStr_kind:
return compiler_joined_str(c, e);
case FormattedValue_kind:
return compiler_formatted_value(c, e);
case Bytes_kind:
ADDOP_LOAD_CONST(c, e->v.Bytes.s);
break;
case Ellipsis_kind:
ADDOP_LOAD_CONST(c, Py_Ellipsis);
break;
case NameConstant_kind:
ADDOP_LOAD_CONST(c, e->v.NameConstant.value);
break;
/* The following exprs can be assignment targets. */
case Attribute_kind:
if (e->v.Attribute.ctx != AugStore)

5
Python/symtable.c
View File

@ -1461,11 +1461,6 @@ symtable_visit_expr(struct symtable *st, expr_ty e)
VISIT_SEQ(st, expr, e->v.JoinedStr.values);
break;
case Constant_kind:
case Num_kind:
case Str_kind:
case Bytes_kind:
case Ellipsis_kind:
case NameConstant_kind:
/* Nothing to do here. */
break;
/* The following exprs can be assignment targets. */

17
Tools/clinic/clinic.py
View File

@ -3840,9 +3840,6 @@ class DSLParser:
# "starred": "a = [1, 2, 3]; *a"
visit_Starred = bad_node
# allow ellipsis, for now
# visit_Ellipsis = bad_node
blacklist = DetectBadNodes()
blacklist.visit(module)
bad = blacklist.bad
@ -3868,10 +3865,15 @@ class DSLParser:
py_default = 'None'
c_default = "NULL"
elif (isinstance(expr, ast.BinOp) or
(isinstance(expr, ast.UnaryOp) and not isinstance(expr.operand, ast.Num))):
(isinstance(expr, ast.UnaryOp) and
not (isinstance(expr.operand, ast.Num) or
(hasattr(ast, 'Constant') and
isinstance(expr.operand, ast.Constant) and
type(expr.operand.value) in (int, float, complex)))
)):
c_default = kwargs.get("c_default")
if not (isinstance(c_default, str) and c_default):
fail("When you specify an expression (" + repr(default) + ") as your default value,\nyou MUST specify a valid c_default.")
fail("When you specify an expression (" + repr(default) + ") as your default value,\nyou MUST specify a valid c_default." + ast.dump(expr))
py_default = default
value = unknown
elif isinstance(expr, ast.Attribute):
@ -3946,6 +3948,11 @@ class DSLParser:
self.function.parameters[parameter_name] = p
def parse_converter(self, annotation):
if (hasattr(ast, 'Constant') and
isinstance(annotation, ast.Constant) and
type(annotation.value) is str):
return annotation.value, True, {}
if isinstance(annotation, ast.Str):
return annotation.s, True, {}

23
Tools/parser/unparse.py
View File

@ -329,12 +329,6 @@ class Unparser:
self.leave()
# expr
def _Bytes(self, t):
self.write(repr(t.s))
def _Str(self, tree):
self.write(repr(tree.s))
def _JoinedStr(self, t):
self.write("f")
string = io.StringIO()
@ -352,10 +346,6 @@ class Unparser:
meth = getattr(self, "_fstring_" + type(value).__name__)
meth(value, write)
def _fstring_Str(self, t, write):
value = t.s.replace("{", "{{").replace("}", "}}")
write(value)
def _fstring_Constant(self, t, write):
assert isinstance(t.value, str)
value = t.value.replace("{", "{{").replace("}", "}}")
@ -384,6 +374,7 @@ class Unparser:
def _write_constant(self, value):
if isinstance(value, (float, complex)):
# Substitute overflowing decimal literal for AST infinities.
self.write(repr(value).replace("inf", INFSTR))
else:
self.write(repr(value))
@ -398,16 +389,11 @@ class Unparser:
else:
interleave(lambda: self.write(", "), self._write_constant, value)
self.write(")")
elif value is ...:
self.write("...")
else:
self._write_constant(t.value)
def _NameConstant(self, t):
self.write(repr(t.value))
def _Num(self, t):
# Substitute overflowing decimal literal for AST infinities.
self.write(repr(t.n).replace("inf", INFSTR))
def _List(self, t):
self.write("[")
interleave(lambda: self.write(", "), self.dispatch, t.elts)
@ -539,8 +525,7 @@ class Unparser:
# Special case: 3.__abs__() is a syntax error, so if t.value
# is an integer literal then we need to either parenthesize
# it or add an extra space to get 3 .__abs__().
if ((isinstance(t.value, ast.Num) and isinstance(t.value.n, int))
or (isinstance(t.value, ast.Constant) and isinstance(t.value.value, int))):
if isinstance(t.value, ast.Constant) and isinstance(t.value.value, int):
self.write(" ")
self.write(".")
self.write(t.attr)