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bpo-35975: Support parsing earlier minor versions of Python 3 (GH-12086) 

This adds a `feature_version` flag to `ast.parse()` (documented) and `compile()` (hidden) that allow tweaking the parser to support older versions of the grammar. In particular if `feature_version` is 5 or 6, the hacks for the `async` and `await` keyword from PEP 492 are reinstated. (For 7 or higher, these are unconditionally treated as keywords, but they are still special tokens rather than `NAME` tokens that the parser driver recognizes.)



https://bugs.python.org/issue35975
This commit is contained in:
Guido van Rossum 2019-03-07 12:38:08 -08:00 committed by Miss Islington (bot)
parent bf94cc7b49
commit 495da29225
29 changed files with 476 additions and 201 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
Doc/library/ast.rst
View File

@ -126,7 +126,7 @@ The abstract grammar is currently defined as follows:
Apart from the node classes, the :mod:`ast` module defines these utility functions
and classes for traversing abstract syntax trees:
.. function:: parse(source, filename='<unknown>', mode='exec', *, type_comments=False)
.. function:: parse(source, filename='<unknown>', mode='exec', *, type_comments=False, feature_version=-1)
Parse the source into an AST node. Equivalent to ``compile(source,
filename, mode, ast.PyCF_ONLY_AST)``.
@ -145,13 +145,19 @@ and classes for traversing abstract syntax trees:
modified to correspond to :pep:`484` "signature type comments",
e.g. ``(str, int) -> List[str]``.
Also, setting ``feature_version`` to the minor version of an
earlier Python 3 version will attempt to parse using that version's
grammar. For example, setting ``feature_version=4`` will allow
the use of ``async`` and ``await`` as variable names. The lowest
supported value is 4; the highest is ``sys.version_info[1]``.
.. warning::
It is possible to crash the Python interpreter with a
sufficiently large/complex string due to stack depth limitations
in Python's AST compiler.
.. versionchanged:: 3.8
Added ``type_comments=True`` and ``mode='func_type'``.
Added ``type_comments``, ``mode='func_type'`` and ``feature_version``.
.. function:: literal_eval(node_or_string)

4
Doc/library/token-list.inc generated
View File

@ -203,6 +203,10 @@
.. data:: OP
.. data:: AWAIT
.. data:: ASYNC
.. data:: TYPE_IGNORE
.. data:: TYPE_COMMENT

3
Doc/library/token.rst
View File

@ -88,3 +88,6 @@ the :mod:`tokenize` module.
.. versionchanged:: 3.8
Added :data:`TYPE_COMMENT`.
Added :data:`AWAIT` and :data:`ASYNC` tokens back (they're needed
to support parsing older Python versions for :func:`ast.parse` with
``feature_version`` set to 6 or lower).

8
Grammar/Grammar
View File

@ -18,7 +18,7 @@ decorator: '@' dotted_name [ '(' [arglist] ')' ] NEWLINE
decorators: decorator+
decorated: decorators (classdef | funcdef | async_funcdef)
async_funcdef: 'async' funcdef
async_funcdef: ASYNC funcdef
funcdef: 'def' NAME parameters ['->' test] ':' [TYPE_COMMENT] func_body_suite
parameters: '(' [typedargslist] ')'
@ -70,7 +70,7 @@ nonlocal_stmt: 'nonlocal' NAME (',' NAME)*
assert_stmt: 'assert' test [',' test]
compound_stmt: if_stmt | while_stmt | for_stmt | try_stmt | with_stmt | funcdef | classdef | decorated | async_stmt
async_stmt: 'async' (funcdef | with_stmt | for_stmt)
async_stmt: ASYNC (funcdef | with_stmt | for_stmt)
if_stmt: 'if' namedexpr_test ':' suite ('elif' namedexpr_test ':' suite)* ['else' ':' suite]
while_stmt: 'while' namedexpr_test ':' suite ['else' ':' suite]
for_stmt: 'for' exprlist 'in' testlist ':' [TYPE_COMMENT] suite ['else' ':' suite]
@ -106,7 +106,7 @@ arith_expr: term (('+'|'-') term)*
term: factor (('*'|'@'|'/'|'%'|'//') factor)*
factor: ('+'|'-'|'~') factor | power
power: atom_expr ['**' factor]
atom_expr: ['await'] atom trailer*
atom_expr: [AWAIT] atom trailer*
atom: ('(' [yield_expr|testlist_comp] ')' |
'[' [testlist_comp] ']' |
'{' [dictorsetmaker] '}' |
@ -144,7 +144,7 @@ argument: ( test [comp_for] |
comp_iter: comp_for | comp_if
sync_comp_for: 'for' exprlist 'in' or_test [comp_iter]
comp_for: ['async'] sync_comp_for
comp_for: [ASYNC] sync_comp_for
comp_if: 'if' test_nocond [comp_iter]
# not used in grammar, but may appear in "node" passed from Parser to Compiler

2
Grammar/Tokens
View File

@ -55,6 +55,8 @@ ELLIPSIS '...'
COLONEQUAL ':='
OP
AWAIT
ASYNC
TYPE_IGNORE
TYPE_COMMENT
ERRORTOKEN

1
Include/Python-ast.h generated
View File

@ -703,6 +703,7 @@ type_ignore_ty _Py_TypeIgnore(int lineno, PyArena *arena);
PyObject* PyAST_mod2obj(mod_ty t);
mod_ty PyAST_obj2mod(PyObject* ast, PyArena* arena, int mode);
mod_ty PyAST_obj2mod_ex(PyObject* ast, PyArena* arena, int mode, int feature_version);
int PyAST_Check(PyObject* obj);
#ifdef __cplusplus

1
Include/compile.h
View File

@ -27,6 +27,7 @@ PyAPI_FUNC(PyCodeObject *) PyNode_Compile(struct _node *, const char *);
#ifndef Py_LIMITED_API
typedef struct {
int cf_flags; /* bitmask of CO_xxx flags relevant to future */
int cf_feature_version; /* minor Python version (PyCF_ONLY_AST) */
} PyCompilerFlags;
#endif

1
Include/parsetok.h
View File

@ -35,6 +35,7 @@ typedef struct {
#define PyPARSE_IGNORE_COOKIE 0x0010
#define PyPARSE_BARRY_AS_BDFL 0x0020
#define PyPARSE_TYPE_COMMENTS 0x0040
#define PyPARSE_ASYNC_HACKS 0x0080
PyAPI_FUNC(node *) PyParser_ParseString(const char *, grammar *, int,
perrdetail *);

10
Include/token.h generated
View File

@ -65,10 +65,12 @@ extern "C" {
#define ELLIPSIS 52
#define COLONEQUAL 53
#define OP 54
#define TYPE_IGNORE 55
#define TYPE_COMMENT 56
#define ERRORTOKEN 57
#define N_TOKENS 61
#define AWAIT 55
#define ASYNC 56
#define TYPE_IGNORE 57
#define TYPE_COMMENT 58
#define ERRORTOKEN 59
#define N_TOKENS 63
#define NT_OFFSET 256
/* Special definitions for cooperation with parser */

6
Lib/ast.py
View File

@ -27,7 +27,8 @@
from _ast import *
def parse(source, filename='<unknown>', mode='exec', *, type_comments=False):
def parse(source, filename='<unknown>', mode='exec', *,
type_comments=False, feature_version=-1):
"""
Parse the source into an AST node.
Equivalent to compile(source, filename, mode, PyCF_ONLY_AST).
@ -36,7 +37,8 @@ def parse(source, filename='<unknown>', mode='exec', *, type_comments=False):
flags = PyCF_ONLY_AST
if type_comments:
flags |= PyCF_TYPE_COMMENTS
return compile(source, filename, mode, flags)
return compile(source, filename, mode, flags,
feature_version=feature_version)
def literal_eval(node_or_string):

6
Lib/keyword.py
View File

@ -20,8 +20,6 @@ kwlist = [
'and',
'as',
'assert',
'async',
'await',
'break',
'class',
'continue',
@ -52,6 +50,10 @@ kwlist = [
#--end keywords--
]
kwlist.append('async')
kwlist.append('await')
kwlist.sort()
iskeyword = frozenset(kwlist).__contains__
def main():

2
Lib/test/test_parser.py
View File

@ -916,7 +916,7 @@ class STObjectTestCase(unittest.TestCase):
return (n + 3) & ~3
return 1 << (n - 1).bit_length()
basesize = support.calcobjsize('Pii')
basesize = support.calcobjsize('Piii')
nodesize = struct.calcsize('hP3iP0h2i')
def sizeofchildren(node):
if node is None:

89
Lib/test/test_type_comments.py
View File

@ -1,4 +1,5 @@
import ast
import sys
import unittest
@ -20,6 +21,29 @@ async def bar(): # type: () -> int
return await bar()
"""
asyncvar = """\
async = 12
await = 13
"""
asynccomp = """\
async def foo(xs):
[x async for x in xs]
"""
matmul = """\
a = b @ c
"""
fstring = """\
a = 42
f"{a}"
"""
underscorednumber = """\
a = 42_42_42
"""
redundantdef = """\
def foo(): # type: () -> int
# type: () -> str
@ -155,14 +179,30 @@ def favk(
class TypeCommentTests(unittest.TestCase):
def parse(self, source):
return ast.parse(source, type_comments=True)
lowest = 4 # Lowest minor version supported
highest = sys.version_info[1] # Highest minor version
def parse(self, source, feature_version=highest):
return ast.parse(source, type_comments=True,
feature_version=feature_version)
def parse_all(self, source, minver=lowest, maxver=highest, expected_regex=""):
for feature_version in range(self.lowest, self.highest + 1):
if minver <= feature_version <= maxver:
try:
yield self.parse(source, feature_version)
except SyntaxError as err:
raise SyntaxError(str(err) + f" feature_version={feature_version}")
else:
with self.assertRaisesRegex(SyntaxError, expected_regex,
msg=f"feature_version={feature_version}"):
self.parse(source, feature_version)
def classic_parse(self, source):
return ast.parse(source)
def test_funcdef(self):
tree = self.parse(funcdef)
for tree in self.parse_all(funcdef):
self.assertEqual(tree.body[0].type_comment, "() -> int")
self.assertEqual(tree.body[1].type_comment, "() -> None")
tree = self.classic_parse(funcdef)
@ -170,47 +210,68 @@ class TypeCommentTests(unittest.TestCase):
self.assertEqual(tree.body[1].type_comment, None)
def test_asyncdef(self):
tree = self.parse(asyncdef)
for tree in self.parse_all(asyncdef, minver=5):
self.assertEqual(tree.body[0].type_comment, "() -> int")
self.assertEqual(tree.body[1].type_comment, "() -> int")
tree = self.classic_parse(asyncdef)
self.assertEqual(tree.body[0].type_comment, None)
self.assertEqual(tree.body[1].type_comment, None)
def test_asyncvar(self):
for tree in self.parse_all(asyncvar, maxver=6):
pass
def test_asynccomp(self):
for tree in self.parse_all(asynccomp, minver=6):
pass
def test_matmul(self):
for tree in self.parse_all(matmul, minver=5):
pass
def test_fstring(self):
for tree in self.parse_all(fstring, minver=6):
pass
def test_underscorednumber(self):
for tree in self.parse_all(underscorednumber, minver=6):
pass
def test_redundantdef(self):
with self.assertRaisesRegex(SyntaxError, "^Cannot have two type comments on def"):
tree = self.parse(redundantdef)
for tree in self.parse_all(redundantdef, maxver=0,
expected_regex="^Cannot have two type comments on def"):
pass
def test_nonasciidef(self):
tree = self.parse(nonasciidef)
for tree in self.parse_all(nonasciidef):
self.assertEqual(tree.body[0].type_comment, "() -> àçčéñt")
def test_forstmt(self):
tree = self.parse(forstmt)
for tree in self.parse_all(forstmt):
self.assertEqual(tree.body[0].type_comment, "int")
tree = self.classic_parse(forstmt)
self.assertEqual(tree.body[0].type_comment, None)
def test_withstmt(self):
tree = self.parse(withstmt)
for tree in self.parse_all(withstmt):
self.assertEqual(tree.body[0].type_comment, "int")
tree = self.classic_parse(withstmt)
self.assertEqual(tree.body[0].type_comment, None)
def test_vardecl(self):
tree = self.parse(vardecl)
for tree in self.parse_all(vardecl):
self.assertEqual(tree.body[0].type_comment, "int")
tree = self.classic_parse(vardecl)
self.assertEqual(tree.body[0].type_comment, None)
def test_ignores(self):
tree = self.parse(ignores)
for tree in self.parse_all(ignores):
self.assertEqual([ti.lineno for ti in tree.type_ignores], [2, 5])
tree = self.classic_parse(ignores)
self.assertEqual(tree.type_ignores, [])
def test_longargs(self):
tree = self.parse(longargs)
for tree in self.parse_all(longargs):
for t in tree.body:
# The expected args are encoded in the function name
todo = set(t.name[1:])
@ -247,8 +308,8 @@ class TypeCommentTests(unittest.TestCase):
def check_both_ways(source):
ast.parse(source, type_comments=False)
with self.assertRaises(SyntaxError):
ast.parse(source, type_comments=True)
for tree in self.parse_all(source, maxver=0):
pass
check_both_ways("pass # type: int\n")
check_both_ways("foo() # type: int\n")

16
Lib/token.py generated
View File

@ -58,14 +58,16 @@ RARROW = 51
ELLIPSIS = 52
COLONEQUAL = 53
OP = 54
TYPE_IGNORE = 55
TYPE_COMMENT = 56
AWAIT = 55
ASYNC = 56
TYPE_IGNORE = 57
TYPE_COMMENT = 58
# These aren't used by the C tokenizer but are needed for tokenize.py
ERRORTOKEN = 57
COMMENT = 58
NL = 59
ENCODING = 60
N_TOKENS = 61
ERRORTOKEN = 59
COMMENT = 60
NL = 61
ENCODING = 62
N_TOKENS = 63
# Special definitions for cooperation with parser
NT_OFFSET = 256

7
Misc/NEWS.d/next/Core and Builtins/2019-02-27-16-49-08.bpo-35975.IescLY.rst Normal file
View File

@ -0,0 +1,7 @@
Add a ``feature_version`` flag to ``ast.parse()`` (documented) and
``compile()`` (hidden) that allows tweaking the parser to support older
versions of the grammar. In particular, if ``feature_version`` is 5 or 6,
the hacks for the ``async`` and ``await`` keyword from PEP 492 are
reinstated. (For 7 or higher, these are unconditionally treated as keywords,
but they are still special tokens rather than ``NAME`` tokens that the
parser driver recognizes.)

2
Modules/main.c
View File

@ -799,7 +799,7 @@ pymain_run_python(PyInterpreterState *interp, int *exitcode)
Py_DECREF(path0);
}
PyCompilerFlags cf = {.cf_flags = 0};
PyCompilerFlags cf = {.cf_flags = 0, .cf_feature_version = PY_MINOR_VERSION};
pymain_header(config);
pymain_import_readline(config);

5
Modules/parsermodule.c
View File

@ -341,6 +341,7 @@ parser_newstobject(node *st, int type)
o->st_node = st;
o->st_type = type;
o->st_flags.cf_flags = 0;
o->st_flags.cf_feature_version = PY_MINOR_VERSION;
}
else {
PyNode_Free(st);
@ -584,8 +585,10 @@ parser_do_parse(PyObject *args, PyObject *kw, const char *argspec, int type)
if (n) {
res = parser_newstobject(n, type);
if (res)
if (res) {
((PyST_Object *)res)->st_flags.cf_flags = flags & PyCF_MASK;
((PyST_Object *)res)->st_flags.cf_feature_version = PY_MINOR_VERSION;
}
}
else {
PyParser_SetError(&err);

6
Parser/asdl_c.py
View File

@ -1188,6 +1188,11 @@ PyObject* PyAST_mod2obj(mod_ty t)
/* mode is 0 for "exec", 1 for "eval" and 2 for "single" input */
mod_ty PyAST_obj2mod(PyObject* ast, PyArena* arena, int mode)
{
return PyAST_obj2mod_ex(ast, arena, mode, PY_MINOR_VERSION);
}
mod_ty PyAST_obj2mod_ex(PyObject* ast, PyArena* arena, int mode, int feature_version)
{
mod_ty res;
PyObject *req_type[3];
@ -1269,6 +1274,7 @@ def main(srcfile, dump_module=False):
f.write("\n")
f.write("PyObject* PyAST_mod2obj(mod_ty t);\n")
f.write("mod_ty PyAST_obj2mod(PyObject* ast, PyArena* arena, int mode);\n")
f.write("mod_ty PyAST_obj2mod_ex(PyObject* ast, PyArena* arena, int mode, int feature_version);\n")
f.write("int PyAST_Check(PyObject* obj);\n")
f.write('\n')
f.write('#ifdef __cplusplus\n')

2
Parser/parsetok.c
View File

@ -101,6 +101,8 @@ PyParser_ParseStringObject(const char *s, PyObject *filename,
Py_INCREF(err_ret->filename);
tok->filename = err_ret->filename;
if (*flags & PyPARSE_ASYNC_HACKS)
tok->async_hacks = 1;
return parsetok(tok, g, start, err_ret, flags);
}

2
Parser/token.c generated
View File

@ -61,6 +61,8 @@ const char * const _PyParser_TokenNames[] = {
"ELLIPSIS",
"COLONEQUAL",
"OP",
"AWAIT",
"ASYNC",
"TYPE_IGNORE",
"TYPE_COMMENT",
"<ERRORTOKEN>",

79
Parser/tokenizer.c
View File

@ -84,6 +84,11 @@ tok_new(void)
tok->decoding_buffer = NULL;
tok->type_comments = 0;
tok->async_hacks = 0;
tok->async_def = 0;
tok->async_def_indent = 0;
tok->async_def_nl = 0;
return tok;
}
@ -1196,6 +1201,31 @@ tok_get(struct tok_state *tok, char **p_start, char **p_end)
}
}
/* Peek ahead at the next character */
c = tok_nextc(tok);
tok_backup(tok, c);
/* Check if we are closing an async function */
if (tok->async_def
&& !blankline
/* Due to some implementation artifacts of type comments,
* a TYPE_COMMENT at the start of a function won't set an
* indentation level and it will produce a NEWLINE after it.
* To avoid spuriously ending an async function due to this,
* wait until we have some non-newline char in front of us. */
&& c != '\n'
&& tok->level == 0
/* There was a NEWLINE after ASYNC DEF,
so we're past the signature. */
&& tok->async_def_nl
/* Current indentation level is less than where
the async function was defined */
&& tok->async_def_indent >= tok->indent)
{
tok->async_def = 0;
tok->async_def_indent = 0;
tok->async_def_nl = 0;
}
again:
tok->start = NULL;
/* Skip spaces */
@ -1310,6 +1340,50 @@ tok_get(struct tok_state *tok, char **p_start, char **p_end)
*p_start = tok->start;
*p_end = tok->cur;
/* async/await parsing block. */
if (tok->cur - tok->start == 5 && tok->start[0] == 'a') {
/* May be an 'async' or 'await' token. For Python 3.7 or
later we recognize them unconditionally. For Python
3.5 or 3.6 we recognize 'async' in front of 'def', and
either one inside of 'async def'. (Technically we
shouldn't recognize these at all for 3.4 or earlier,
but there's no *valid* Python 3.4 code that would be
rejected, and async functions will be rejected in a
later phase.) */
if (!tok->async_hacks || tok->async_def) {
/* Always recognize the keywords. */
if (memcmp(tok->start, "async", 5) == 0) {
return ASYNC;
}
if (memcmp(tok->start, "await", 5) == 0) {
return AWAIT;
}
}
else if (memcmp(tok->start, "async", 5) == 0) {
/* The current token is 'async'.
Look ahead one token to see if that is 'def'. */
struct tok_state ahead_tok;
char *ahead_tok_start = NULL, *ahead_tok_end = NULL;
int ahead_tok_kind;
memcpy(&ahead_tok, tok, sizeof(ahead_tok));
ahead_tok_kind = tok_get(&ahead_tok, &ahead_tok_start,
&ahead_tok_end);
if (ahead_tok_kind == NAME
&& ahead_tok.cur - ahead_tok.start == 3
&& memcmp(ahead_tok.start, "def", 3) == 0)
{
/* The next token is going to be 'def', so instead of
returning a plain NAME token, return ASYNC. */
tok->async_def_indent = tok->indent;
tok->async_def = 1;
return ASYNC;
}
}
}
return NAME;
}
@ -1322,6 +1396,11 @@ tok_get(struct tok_state *tok, char **p_start, char **p_end)
*p_start = tok->start;
*p_end = tok->cur - 1; /* Leave '\n' out of the string */
tok->cont_line = 0;
if (tok->async_def) {
/* We're somewhere inside an 'async def' function, and
we've encountered a NEWLINE after its signature. */
tok->async_def_nl = 1;
}
return NEWLINE;
}

7
Parser/tokenizer.h
View File

@ -64,6 +64,13 @@ struct tok_state {
const char* input; /* Tokenizer's newline translated copy of the string. */
int type_comments; /* Whether to look for type comments */
/* async/await related fields (still needed depending on feature_version) */
int async_hacks; /* =1 if async/await aren't always keywords */
int async_def; /* =1 if tokens are inside an 'async def' body. */
int async_def_indent; /* Indentation level of the outermost 'async def'. */
int async_def_nl; /* =1 if the outermost 'async def' had at least one
NEWLINE token after it. */
};
extern struct tok_state *PyTokenizer_FromString(const char *, int);

5
Python/Python-ast.c generated
View File

@ -8899,6 +8899,11 @@ PyObject* PyAST_mod2obj(mod_ty t)
/* mode is 0 for "exec", 1 for "eval" and 2 for "single" input */
mod_ty PyAST_obj2mod(PyObject* ast, PyArena* arena, int mode)
{
return PyAST_obj2mod_ex(ast, arena, mode, PY_MINOR_VERSION);
}
mod_ty PyAST_obj2mod_ex(PyObject* ast, PyArena* arena, int mode, int feature_version)
{
mod_ty res;
PyObject *req_type[3];

98
Python/ast.c
View File

@ -564,6 +564,7 @@ struct compiling {
PyArena *c_arena; /* Arena for allocating memory. */
PyObject *c_filename; /* filename */
PyObject *c_normalize; /* Normalization function from unicodedata. */
int c_feature_version; /* Latest minor version of Python for allowed features */
};
static asdl_seq *seq_for_testlist(struct compiling *, const node *);
@ -783,6 +784,7 @@ PyAST_FromNodeObject(const node *n, PyCompilerFlags *flags,
/* borrowed reference */
c.c_filename = filename;
c.c_normalize = NULL;
c.c_feature_version = flags->cf_feature_version;
if (TYPE(n) == encoding_decl)
n = CHILD(n, 0);
@ -955,7 +957,7 @@ PyAST_FromNode(const node *n, PyCompilerFlags *flags, const char *filename_str,
*/
static operator_ty
get_operator(const node *n)
get_operator(struct compiling *c, const node *n)
{
switch (TYPE(n)) {
case VBAR:
@ -975,6 +977,11 @@ get_operator(const node *n)
case STAR:
return Mult;
case AT:
if (c->c_feature_version < 5) {
ast_error(c, n,
"The '@' operator is only supported in Python 3.5 and greater");
return (operator_ty)0;
}
return MatMult;
case SLASH:
return Div;
@ -1209,6 +1216,11 @@ ast_for_augassign(struct compiling *c, const node *n)
else
return Mult;
case '@':
if (c->c_feature_version < 5) {
ast_error(c, n,
"The '@' operator is only supported in Python 3.5 and greater");
return (operator_ty)0;
}
return MatMult;
default:
PyErr_Format(PyExc_SystemError, "invalid augassign: %s", STR(n));
@ -1719,6 +1731,12 @@ ast_for_funcdef_impl(struct compiling *c, const node *n0,
node *tc;
string type_comment = NULL;
if (is_async && c->c_feature_version < 5) {
ast_error(c, n,
"Async functions are only supported in Python 3.5 and greater");
return NULL;
}
REQ(n, funcdef);
name = NEW_IDENTIFIER(CHILD(n, name_i));
@ -1772,10 +1790,9 @@ ast_for_funcdef_impl(struct compiling *c, const node *n0,
static stmt_ty
ast_for_async_funcdef(struct compiling *c, const node *n, asdl_seq *decorator_seq)
{
/* async_funcdef: 'async' funcdef */
/* async_funcdef: ASYNC funcdef */
REQ(n, async_funcdef);
REQ(CHILD(n, 0), NAME);
assert(strcmp(STR(CHILD(n, 0)), "async") == 0);
REQ(CHILD(n, 0), ASYNC);
REQ(CHILD(n, 1), funcdef);
return ast_for_funcdef_impl(c, n, decorator_seq,
@ -1794,10 +1811,9 @@ ast_for_funcdef(struct compiling *c, const node *n, asdl_seq *decorator_seq)
static stmt_ty
ast_for_async_stmt(struct compiling *c, const node *n)
{
/* async_stmt: 'async' (funcdef | with_stmt | for_stmt) */
/* async_stmt: ASYNC (funcdef | with_stmt | for_stmt) */
REQ(n, async_stmt);
REQ(CHILD(n, 0), NAME);
assert(strcmp(STR(CHILD(n, 0)), "async") == 0);
REQ(CHILD(n, 0), ASYNC);
switch (TYPE(CHILD(n, 1))) {
case funcdef:
@ -1948,8 +1964,7 @@ count_comp_fors(struct compiling *c, const node *n)
n_fors++;
REQ(n, comp_for);
if (NCH(n) == 2) {
REQ(CHILD(n, 0), NAME);
assert(strcmp(STR(CHILD(n, 0)), "async") == 0);
REQ(CHILD(n, 0), ASYNC);
n = CHILD(n, 1);
}
else if (NCH(n) == 1) {
@ -2034,8 +2049,7 @@ ast_for_comprehension(struct compiling *c, const node *n)
if (NCH(n) == 2) {
is_async = 1;
REQ(CHILD(n, 0), NAME);
assert(strcmp(STR(CHILD(n, 0)), "async") == 0);
REQ(CHILD(n, 0), ASYNC);
sync_n = CHILD(n, 1);
}
else {
@ -2043,6 +2057,13 @@ ast_for_comprehension(struct compiling *c, const node *n)
}
REQ(sync_n, sync_comp_for);
/* Async comprehensions only allowed in Python 3.6 and greater */
if (is_async && c->c_feature_version < 6) {
ast_error(c, n,
"Async comprehensions are only supported in Python 3.6 and greater");
return NULL;
}
for_ch = CHILD(sync_n, 1);
t = ast_for_exprlist(c, for_ch, Store);
if (!t)
@ -2337,7 +2358,15 @@ ast_for_atom(struct compiling *c, const node *n)
return str;
}
case NUMBER: {
PyObject *pynum = parsenumber(c, STR(ch));
PyObject *pynum;
/* Underscores in numeric literals are only allowed in Python 3.6 or greater */
/* Check for underscores here rather than in parse_number so we can report a line number on error */
if (c->c_feature_version < 6 && strchr(STR(ch), '_') != NULL) {
ast_error(c, ch,
"Underscores in numeric literals are only supported in Python 3.6 and greater");
return NULL;
}
pynum = parsenumber(c, STR(ch));
if (!pynum)
return NULL;
@ -2420,8 +2449,8 @@ ast_for_atom(struct compiling *c, const node *n)
TYPE(CHILD(ch, 3 - is_dict)) == comp_for) {
/* It's a dictionary comprehension. */
if (is_dict) {
ast_error(c, n, "dict unpacking cannot be used in "
"dict comprehension");
ast_error(c, n,
"dict unpacking cannot be used in dict comprehension");
return NULL;
}
res = ast_for_dictcomp(c, ch);
@ -2524,7 +2553,7 @@ ast_for_binop(struct compiling *c, const node *n)
if (!expr2)
return NULL;
newoperator = get_operator(CHILD(n, 1));
newoperator = get_operator(c, CHILD(n, 1));
if (!newoperator)
return NULL;
@ -2539,7 +2568,7 @@ ast_for_binop(struct compiling *c, const node *n)
expr_ty tmp_result, tmp;
const node* next_oper = CHILD(n, i * 2 + 1);
newoperator = get_operator(next_oper);
newoperator = get_operator(c, next_oper);
if (!newoperator)
return NULL;
@ -2678,7 +2707,12 @@ ast_for_atom_expr(struct compiling *c, const node *n)
REQ(n, atom_expr);
nch = NCH(n);
if (TYPE(CHILD(n, 0)) == NAME && strcmp(STR(CHILD(n, 0)), "await") == 0) {
if (TYPE(CHILD(n, 0)) == AWAIT) {
if (c->c_feature_version < 5) {
ast_error(c, n,
"Await expressions are only supported in Python 3.5 and greater");
return NULL;
}
start = 1;
assert(nch > 1);
}
@ -2775,7 +2809,7 @@ ast_for_expr(struct compiling *c, const node *n)
term: factor (('*'|'@'|'/'|'%'|'//') factor)*
factor: ('+'|'-'|'~') factor | power
power: atom_expr ['**' factor]
atom_expr: ['await'] atom trailer*
atom_expr: [AWAIT] atom trailer*
yield_expr: 'yield' [yield_arg]
*/
@ -3233,6 +3267,13 @@ ast_for_expr_stmt(struct compiling *c, const node *n)
node *deep, *ann = CHILD(n, 1);
int simple = 1;
/* AnnAssigns are only allowed in Python 3.6 or greater */
if (c->c_feature_version < 6) {
ast_error(c, ch,
"Variable annotation syntax is only supported in Python 3.6 and greater");
return NULL;
}
/* we keep track of parens to qualify (x) as expression not name */
deep = ch;
while (NCH(deep) == 1) {
@ -4050,6 +4091,13 @@ ast_for_for_stmt(struct compiling *c, const node *n0, bool is_async)
int end_lineno, end_col_offset;
int has_type_comment;
string type_comment;
if (is_async && c->c_feature_version < 5) {
ast_error(c, n,
"Async for loops are only supported in Python 3.5 and greater");
return NULL;
}
/* for_stmt: 'for' exprlist 'in' testlist ':' [TYPE_COMMENT] suite ['else' ':' suite] */
REQ(n, for_stmt);
@ -4278,6 +4326,12 @@ ast_for_with_stmt(struct compiling *c, const node *n0, bool is_async)
asdl_seq *items, *body;
string type_comment;
if (is_async && c->c_feature_version < 5) {
ast_error(c, n,
"Async with statements are only supported in Python 3.5 and greater");
return NULL;
}
REQ(n, with_stmt);
has_type_comment = TYPE(CHILD(n, NCH(n) - 2)) == TYPE_COMMENT;
@ -4768,6 +4822,7 @@ fstring_compile_expr(const char *expr_start, const char *expr_end,
str[len+2] = 0;
cf.cf_flags = PyCF_ONLY_AST;
cf.cf_feature_version = PY_MINOR_VERSION;
mod_n = PyParser_SimpleParseStringFlagsFilename(str, "<fstring>",
Py_eval_input, 0);
if (!mod_n) {
@ -5568,6 +5623,13 @@ parsestr(struct compiling *c, const node *n, int *bytesmode, int *rawmode,
}
}
}
/* fstrings are only allowed in Python 3.6 and greater */
if (fmode && c->c_feature_version < 6) {
ast_error(c, n, "Format strings are only supported in Python 3.6 and greater");
return -1;
}
if (fmode && *bytesmode) {
PyErr_BadInternalCall();
return -1;

11
Python/bltinmodule.c
View File

@ -745,6 +745,7 @@ compile as builtin_compile
flags: int = 0
dont_inherit: bool(accept={int}) = False
optimize: int = -1
feature_version: int = -1
Compile source into a code object that can be executed by exec() or eval().
@ -763,8 +764,8 @@ in addition to any features explicitly specified.
static PyObject *
builtin_compile_impl(PyObject *module, PyObject *source, PyObject *filename,
const char *mode, int flags, int dont_inherit,
int optimize)
/*[clinic end generated code: output=1fa176e33452bb63 input=0ff726f595eb9fcd]*/
int optimize, int feature_version)
/*[clinic end generated code: output=b0c09c84f116d3d7 input=5fcc30651a6acaa9]*/
{
PyObject *source_copy;
const char *str;
@ -775,6 +776,10 @@ builtin_compile_impl(PyObject *module, PyObject *source, PyObject *filename,
PyObject *result;
cf.cf_flags = flags | PyCF_SOURCE_IS_UTF8;
cf.cf_feature_version = PY_MINOR_VERSION;
if (feature_version >= 0 && (flags & PyCF_ONLY_AST)) {
cf.cf_feature_version = feature_version;
}
if (flags &
~(PyCF_MASK | PyCF_MASK_OBSOLETE | PyCF_DONT_IMPLY_DEDENT | PyCF_ONLY_AST | PyCF_TYPE_COMMENTS))
@ -981,6 +986,7 @@ builtin_eval_impl(PyObject *module, PyObject *source, PyObject *globals,
}
cf.cf_flags = PyCF_SOURCE_IS_UTF8;
cf.cf_feature_version = PY_MINOR_VERSION;
str = source_as_string(source, "eval", "string, bytes or code", &cf, &source_copy);
if (str == NULL)
return NULL;
@ -1068,6 +1074,7 @@ builtin_exec_impl(PyObject *module, PyObject *source, PyObject *globals,
const char *str;
PyCompilerFlags cf;
cf.cf_flags = PyCF_SOURCE_IS_UTF8;
cf.cf_feature_version = PY_MINOR_VERSION;
str = source_as_string(source, "exec",
"string, bytes or code", &cf,
&source_copy);

15
Python/clinic/bltinmodule.c.h generated
View File

@ -151,7 +151,7 @@ exit:
PyDoc_STRVAR(builtin_compile__doc__,
"compile($module, /, source, filename, mode, flags=0,\n"
" dont_inherit=False, optimize=-1)\n"
" dont_inherit=False, optimize=-1, feature_version=-1)\n"
"--\n"
"\n"
"Compile source into a code object that can be executed by exec() or eval().\n"
@ -173,26 +173,27 @@ PyDoc_STRVAR(builtin_compile__doc__,
static PyObject *
builtin_compile_impl(PyObject *module, PyObject *source, PyObject *filename,
const char *mode, int flags, int dont_inherit,
int optimize);
int optimize, int feature_version);
static PyObject *
builtin_compile(PyObject *module, PyObject *const *args, Py_ssize_t nargs, PyObject *kwnames)
{
PyObject *return_value = NULL;
static const char * const _keywords[] = {"source", "filename", "mode", "flags", "dont_inherit", "optimize", NULL};
static _PyArg_Parser _parser = {"OO&s|iii:compile", _keywords, 0};
static const char * const _keywords[] = {"source", "filename", "mode", "flags", "dont_inherit", "optimize", "feature_version", NULL};
static _PyArg_Parser _parser = {"OO&s|iiii:compile", _keywords, 0};
PyObject *source;
PyObject *filename;
const char *mode;
int flags = 0;
int dont_inherit = 0;
int optimize = -1;
int feature_version = -1;
if (!_PyArg_ParseStackAndKeywords(args, nargs, kwnames, &_parser,
&source, PyUnicode_FSDecoder, &filename, &mode, &flags, &dont_inherit, &optimize)) {
&source, PyUnicode_FSDecoder, &filename, &mode, &flags, &dont_inherit, &optimize, &feature_version)) {
goto exit;
}
return_value = builtin_compile_impl(module, source, filename, mode, flags, dont_inherit, optimize);
return_value = builtin_compile_impl(module, source, filename, mode, flags, dont_inherit, optimize, feature_version);
exit:
return return_value;
@ -754,4 +755,4 @@ builtin_issubclass(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
exit:
return return_value;
}
/*[clinic end generated code: output=54e5e33dcc2659e0 input=a9049054013a1b77]*/
/*[clinic end generated code: output=00b97a48ea49eaf2 input=a9049054013a1b77]*/

1
Python/compile.c
View File

@ -330,6 +330,7 @@ PyAST_CompileObject(mod_ty mod, PyObject *filename, PyCompilerFlags *flags,
goto finally;
if (!flags) {
local_flags.cf_flags = 0;
local_flags.cf_feature_version = PY_MINOR_VERSION;
flags = &local_flags;
}
merged = c.c_future->ff_features | flags->cf_flags;

216
Python/graminit.c
View File

@ -106,7 +106,7 @@ static state states_5[3] = {
{1, arcs_5_2},
};
static arc arcs_6_0[1] = {
{16, 1},
{38, 1},
};
static arc arcs_6_1[1] = {
{56, 2},
@ -120,7 +120,7 @@ static state states_6[3] = {
{1, arcs_6_2},
};
static arc arcs_7_0[1] = {
{21, 1},
{19, 1},
};
static arc arcs_7_1[1] = {
{40, 2},
@ -583,7 +583,7 @@ static state states_19[2] = {
{1, arcs_19_1},
};
static arc arcs_20_0[1] = {
{22, 1},
{20, 1},
};
static arc arcs_20_1[1] = {
{98, 2},
@ -597,7 +597,7 @@ static state states_20[3] = {
{1, arcs_20_2},
};
static arc arcs_21_0[1] = {
{31, 1},
{29, 1},
};
static arc arcs_21_1[1] = {
{0, 1},
@ -621,7 +621,7 @@ static state states_22[2] = {
{1, arcs_22_1},
};
static arc arcs_23_0[1] = {
{18, 1},
{16, 1},
};
static arc arcs_23_1[1] = {
{0, 1},
@ -631,7 +631,7 @@ static state states_23[2] = {
{1, arcs_23_1},
};
static arc arcs_24_0[1] = {
{20, 1},
{18, 1},
};
static arc arcs_24_1[1] = {
{0, 1},
@ -641,7 +641,7 @@ static state states_24[2] = {
{1, arcs_24_1},
};
static arc arcs_25_0[1] = {
{33, 1},
{31, 1},
};
static arc arcs_25_1[2] = {
{80, 2},
@ -666,14 +666,14 @@ static state states_26[2] = {
{1, arcs_26_1},
};
static arc arcs_27_0[1] = {
{32, 1},
{30, 1},
};
static arc arcs_27_1[2] = {
{60, 2},
{0, 1},
};
static arc arcs_27_2[2] = {
{24, 3},
{22, 3},
{0, 2},
};
static arc arcs_27_3[1] = {
@ -701,7 +701,7 @@ static state states_28[2] = {
{1, arcs_28_1},
};
static arc arcs_29_0[1] = {
{27, 1},
{25, 1},
};
static arc arcs_29_1[1] = {
{106, 2},
@ -715,7 +715,7 @@ static state states_29[3] = {
{1, arcs_29_2},
};
static arc arcs_30_0[1] = {
{24, 1},
{22, 1},
};
static arc arcs_30_1[3] = {
{107, 2},
@ -725,11 +725,11 @@ static arc arcs_30_1[3] = {
static arc arcs_30_2[4] = {
{107, 2},
{9, 2},
{27, 4},
{25, 4},
{49, 3},
};
static arc arcs_30_3[1] = {
{27, 4},
{25, 4},
};
static arc arcs_30_4[3] = {
{5, 5},
@ -832,7 +832,7 @@ static state states_35[2] = {
{2, arcs_35_1},
};
static arc arcs_36_0[1] = {
{25, 1},
{23, 1},
};
static arc arcs_36_1[1] = {
{40, 2},
@ -847,7 +847,7 @@ static state states_36[3] = {
{2, arcs_36_2},
};
static arc arcs_37_0[1] = {
{29, 1},
{27, 1},
};
static arc arcs_37_1[1] = {
{40, 2},
@ -903,7 +903,7 @@ static state states_39[2] = {
{1, arcs_39_1},
};
static arc arcs_40_0[1] = {
{16, 1},
{38, 1},
};
static arc arcs_40_1[3] = {
{113, 2},
@ -919,7 +919,7 @@ static state states_40[3] = {
{1, arcs_40_2},
};
static arc arcs_41_0[1] = {
{26, 1},
{24, 1},
};
static arc arcs_41_1[1] = {
{118, 2},
@ -955,7 +955,7 @@ static state states_41[8] = {
{1, arcs_41_7},
};
static arc arcs_42_0[1] = {
{35, 1},
{33, 1},
};
static arc arcs_42_1[1] = {
{118, 2},
@ -990,7 +990,7 @@ static state states_42[8] = {
{1, arcs_42_7},
};
static arc arcs_43_0[1] = {
{23, 1},
{21, 1},
};
static arc arcs_43_1[1] = {
{98, 2},
@ -1038,7 +1038,7 @@ static state states_43[11] = {
{1, arcs_43_10},
};
static arc arcs_44_0[1] = {
{34, 1},
{32, 1},
};
static arc arcs_44_1[1] = {
{59, 2},
@ -1097,7 +1097,7 @@ static state states_44[13] = {
{2, arcs_44_12},
};
static arc arcs_45_0[1] = {
{36, 1},
{34, 1},
};
static arc arcs_45_1[1] = {
{125, 2},
@ -1218,7 +1218,7 @@ static arc arcs_50_1[1] = {
{0, 1},
};
static arc arcs_50_2[2] = {
{26, 3},
{24, 3},
{0, 2},
};
static arc arcs_50_3[1] = {
@ -1250,7 +1250,7 @@ static state states_51[2] = {
{1, arcs_51_1},
};
static arc arcs_52_0[1] = {
{28, 1},
{26, 1},
};
static arc arcs_52_1[2] = {
{59, 2},
@ -1273,7 +1273,7 @@ static state states_52[5] = {
{1, arcs_52_4},
};
static arc arcs_53_0[1] = {
{28, 1},
{26, 1},
};
static arc arcs_53_1[2] = {
{59, 2},
@ -1318,7 +1318,7 @@ static state states_55[2] = {
{2, arcs_55_1},
};
static arc arcs_56_0[2] = {
{30, 1},
{28, 1},
{139, 2},
};
static arc arcs_56_1[1] = {
@ -1353,13 +1353,13 @@ static arc arcs_58_0[10] = {
{146, 1},
{122, 1},
{147, 2},
{30, 3},
{28, 3},
};
static arc arcs_58_1[1] = {
{0, 1},
};
static arc arcs_58_2[2] = {
{30, 1},
{28, 1},
{0, 2},
};
static arc arcs_58_3[1] = {
@ -1460,7 +1460,7 @@ static state states_65[2] = {
static arc arcs_66_0[4] = {
{7, 1},
{8, 1},
{39, 1},
{37, 1},
{162, 2},
};
static arc arcs_66_1[1] = {
@ -1494,7 +1494,7 @@ static state states_67[4] = {
{1, arcs_67_3},
};
static arc arcs_68_0[2] = {
{17, 1},
{39, 1},
{164, 2},
};
static arc arcs_68_1[1] = {
@ -1516,7 +1516,7 @@ static arc arcs_69_0[10] = {
{12, 2},
{13, 2},
{14, 3},
{38, 4},
{36, 4},
{40, 2},
{41, 2},
{42, 5},
@ -1788,7 +1788,7 @@ static state states_77[14] = {
{1, arcs_77_13},
};
static arc arcs_78_0[1] = {
{19, 1},
{17, 1},
};
static arc arcs_78_1[1] = {
{40, 2},
@ -1874,7 +1874,7 @@ static state states_81[2] = {
{1, arcs_81_1},
};
static arc arcs_82_0[1] = {
{23, 1},
{21, 1},
};
static arc arcs_82_1[1] = {
{98, 2},
@ -1901,7 +1901,7 @@ static state states_82[6] = {
{1, arcs_82_5},
};
static arc arcs_83_0[2] = {
{16, 1},
{38, 1},
{177, 2},
};
static arc arcs_83_1[1] = {
@ -1916,7 +1916,7 @@ static state states_83[3] = {
{1, arcs_83_2},
};
static arc arcs_84_0[1] = {
{26, 1},
{24, 1},
};
static arc arcs_84_1[1] = {
{133, 2},
@ -1945,7 +1945,7 @@ static state states_85[2] = {
{1, arcs_85_1},
};
static arc arcs_86_0[1] = {
{37, 1},
{35, 1},
};
static arc arcs_86_1[2] = {
{179, 2},
@ -1960,7 +1960,7 @@ static state states_86[3] = {
{1, arcs_86_2},
};
static arc arcs_87_0[2] = {
{24, 1},
{22, 1},
{80, 2},
};
static arc arcs_87_1[1] = {
@ -2115,7 +2115,7 @@ static dfa dfas[92] = {
{257, "file_input", 0, 2, states_1,
"\344\377\377\377\377\027\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{258, "eval_input", 0, 3, states_2,
"\240\173\002\120\300\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\240\173\000\024\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{259, "decorator", 0, 7, states_3,
"\000\004\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{260, "decorators", 0, 2, states_4,
@ -2123,9 +2123,9 @@ static dfa dfas[92] = {
{261, "decorated", 0, 3, states_5,
"\000\004\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{262, "async_funcdef", 0, 3, states_6,
"\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\000\000\000\000\100\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{263, "funcdef", 0, 9, states_7,
"\000\000\040\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\000\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{264, "parameters", 0, 4, states_8,
"\040\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{265, "typedargslist", 0, 22, states_9,
@ -2139,39 +2139,39 @@ static dfa dfas[92] = {
{269, "stmt", 0, 2, states_13,
"\340\377\377\377\377\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{270, "simple_stmt", 0, 4, states_14,
"\340\373\126\373\343\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\340\373\325\376\270\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{271, "small_stmt", 0, 2, states_15,
"\340\373\126\373\343\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\340\373\325\376\270\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{272, "expr_stmt", 0, 6, states_16,
"\340\173\002\120\300\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\340\173\000\024\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{273, "annassign", 0, 5, states_17,
"\000\000\000\000\000\000\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{274, "testlist_star_expr", 0, 3, states_18,
"\340\173\002\120\300\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\340\173\000\024\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{275, "augassign", 0, 2, states_19,
"\000\000\000\000\000\000\000\000\000\000\340\377\003\000\000\000\000\000\000\000\000\000\000"},
{276, "del_stmt", 0, 3, states_20,
"\000\000\100\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{277, "pass_stmt", 0, 2, states_21,
"\000\000\000\200\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{278, "flow_stmt", 0, 2, states_22,
"\000\000\024\000\043\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{279, "break_stmt", 0, 2, states_23,
"\000\000\004\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{280, "continue_stmt", 0, 2, states_24,
"\000\000\020\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{277, "pass_stmt", 0, 2, states_21,
"\000\000\000\040\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{278, "flow_stmt", 0, 2, states_22,
"\000\000\005\300\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{279, "break_stmt", 0, 2, states_23,
"\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{280, "continue_stmt", 0, 2, states_24,
"\000\000\004\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{281, "return_stmt", 0, 3, states_25,
"\000\000\000\000\002\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\000\000\000\200\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{282, "yield_stmt", 0, 2, states_26,
"\000\000\000\000\040\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\000\000\000\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{283, "raise_stmt", 0, 5, states_27,
"\000\000\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\000\000\000\100\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{284, "import_stmt", 0, 2, states_28,
"\000\000\000\011\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\000\000\100\002\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{285, "import_name", 0, 3, states_29,
"\000\000\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\000\000\000\002\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{286, "import_from", 0, 8, states_30,
"\000\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\000\000\100\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{287, "import_as_name", 0, 4, states_31,
"\000\000\000\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{288, "dotted_as_name", 0, 4, states_32,
@ -2183,117 +2183,117 @@ static dfa dfas[92] = {
{291, "dotted_name", 0, 2, states_35,
"\000\000\000\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{292, "global_stmt", 0, 3, states_36,
"\000\000\000\002\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\000\000\200\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{293, "nonlocal_stmt", 0, 3, states_37,
"\000\000\000\040\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\000\000\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{294, "assert_stmt", 0, 5, states_38,
"\000\200\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{295, "compound_stmt", 0, 2, states_39,
"\000\004\251\004\034\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\000\004\052\001\107\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{296, "async_stmt", 0, 3, states_40,
"\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\000\000\000\000\100\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{297, "if_stmt", 0, 8, states_41,
"\000\000\000\004\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\000\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{298, "while_stmt", 0, 8, states_42,
"\000\000\000\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\000\000\000\000\002\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{299, "for_stmt", 0, 11, states_43,
"\000\000\200\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\000\000\040\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{300, "try_stmt", 0, 13, states_44,
"\000\000\000\000\004\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\000\000\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{301, "with_stmt", 0, 6, states_45,
"\000\000\000\000\020\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\000\000\000\000\004\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{302, "with_item", 0, 4, states_46,
"\240\173\002\120\300\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\240\173\000\024\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{303, "except_clause", 0, 5, states_47,
"\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\200\000\000\000\000\000\000\000"},
{304, "suite", 0, 5, states_48,
"\344\373\126\373\343\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\344\373\325\376\270\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{305, "namedexpr_test", 0, 4, states_49,
"\240\173\002\120\300\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\240\173\000\024\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{306, "test", 0, 6, states_50,
"\240\173\002\120\300\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\240\173\000\024\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{307, "test_nocond", 0, 2, states_51,
"\240\173\002\120\300\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\240\173\000\024\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{308, "lambdef", 0, 5, states_52,
"\000\000\000\020\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\000\000\000\004\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{309, "lambdef_nocond", 0, 5, states_53,
"\000\000\000\020\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\000\000\000\004\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{310, "or_test", 0, 2, states_54,
"\240\173\002\100\300\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\240\173\000\020\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{311, "and_test", 0, 2, states_55,
"\240\173\002\100\300\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\240\173\000\020\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{312, "not_test", 0, 3, states_56,
"\240\173\002\100\300\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\240\173\000\020\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{313, "comparison", 0, 2, states_57,
"\240\173\002\000\300\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\240\173\000\000\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{314, "comp_op", 0, 4, states_58,
"\000\000\000\100\000\000\000\000\000\000\000\000\000\000\000\004\000\340\017\000\000\000\000"},
"\000\000\000\020\000\000\000\000\000\000\000\000\000\000\000\004\000\340\017\000\000\000\000"},
{315, "star_expr", 0, 3, states_59,
"\100\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{316, "expr", 0, 2, states_60,
"\240\173\002\000\300\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\240\173\000\000\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{317, "xor_expr", 0, 2, states_61,
"\240\173\002\000\300\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\240\173\000\000\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{318, "and_expr", 0, 2, states_62,
"\240\173\002\000\300\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\240\173\000\000\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{319, "shift_expr", 0, 2, states_63,
"\240\173\002\000\300\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\240\173\000\000\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{320, "arith_expr", 0, 2, states_64,
"\240\173\002\000\300\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\240\173\000\000\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{321, "term", 0, 2, states_65,
"\240\173\002\000\300\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\240\173\000\000\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{322, "factor", 0, 3, states_66,
"\240\173\002\000\300\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\240\173\000\000\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{323, "power", 0, 4, states_67,
"\040\172\002\000\100\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\040\172\000\000\220\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{324, "atom_expr", 0, 3, states_68,
"\040\172\002\000\100\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\040\172\000\000\220\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{325, "atom", 0, 9, states_69,
"\040\172\000\000\100\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\040\172\000\000\020\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{326, "testlist_comp", 0, 5, states_70,
"\340\173\002\120\300\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\340\173\000\024\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{327, "trailer", 0, 7, states_71,
"\040\100\000\000\000\000\000\000\000\000\000\000\000\010\000\000\000\000\000\000\000\000\000"},
{328, "subscriptlist", 0, 3, states_72,
"\240\173\002\120\300\007\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\240\173\000\024\260\007\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{329, "subscript", 0, 5, states_73,
"\240\173\002\120\300\007\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\240\173\000\024\260\007\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{330, "sliceop", 0, 3, states_74,
"\000\000\000\000\000\000\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{331, "exprlist", 0, 3, states_75,
"\340\173\002\000\300\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\340\173\000\000\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{332, "testlist", 0, 3, states_76,
"\240\173\002\120\300\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\240\173\000\024\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{333, "dictorsetmaker", 0, 14, states_77,
"\340\173\002\120\300\007\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\340\173\000\024\260\007\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{334, "classdef", 0, 8, states_78,
"\000\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\000\000\002\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{335, "arglist", 0, 3, states_79,
"\340\173\002\120\300\007\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\340\173\000\024\260\007\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{336, "argument", 0, 4, states_80,
"\340\173\002\120\300\007\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\340\173\000\024\260\007\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{337, "comp_iter", 0, 2, states_81,
"\000\000\201\004\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\000\000\040\001\100\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{338, "sync_comp_for", 0, 6, states_82,
"\000\000\200\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\000\000\040\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{339, "comp_for", 0, 3, states_83,
"\000\000\201\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\000\000\040\000\100\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{340, "comp_if", 0, 4, states_84,
"\000\000\000\004\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\000\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{341, "encoding_decl", 0, 2, states_85,
"\000\000\000\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{342, "yield_expr", 0, 3, states_86,
"\000\000\000\000\040\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\000\000\000\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{343, "yield_arg", 0, 3, states_87,
"\340\173\002\121\300\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\340\173\100\024\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{344, "func_body_suite", 0, 7, states_88,
"\344\373\126\373\343\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\344\373\325\376\270\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{345, "func_type_input", 0, 3, states_89,
"\040\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{346, "func_type", 0, 6, states_90,
"\040\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{347, "typelist", 0, 11, states_91,
"\340\173\002\120\300\007\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
"\340\173\000\024\260\007\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
};
static label labels[183] = {
{0, "EMPTY"},
@ -2312,8 +2312,6 @@ static label labels[183] = {
{1, "True"},
{9, 0},
{1, "assert"},
{1, "async"},
{1, "await"},
{1, "break"},
{1, "class"},
{1, "continue"},
@ -2336,6 +2334,8 @@ static label labels[183] = {
{1, "yield"},
{25, 0},
{31, 0},
{56, 0},
{55, 0},
{1, 0},
{2, 0},
{3, 0},
@ -2357,7 +2357,7 @@ static label labels[183] = {
{51, 0},
{11, 0},
{306, 0},
{56, 0},
{58, 0},
{344, 0},
{265, 0},
{35, 0},

6
Python/pythonrun.c
View File

@ -105,6 +105,7 @@ PyRun_InteractiveLoopFlags(FILE *fp, const char *filename_str, PyCompilerFlags *
if (flags == NULL) {
flags = &local_flags;
local_flags.cf_flags = 0;
local_flags.cf_feature_version = PY_MINOR_VERSION;
}
v = _PySys_GetObjectId(&PyId_ps1);
if (v == NULL) {
@ -1165,6 +1166,7 @@ Py_SymtableStringObject(const char *str, PyObject *filename, int start)
return NULL;
flags.cf_flags = 0;
flags.cf_feature_version = PY_MINOR_VERSION;
mod = PyParser_ASTFromStringObject(str, filename, start, &flags, arena);
if (mod == NULL) {
PyArena_Free(arena);
@ -1198,12 +1200,15 @@ PyParser_ASTFromStringObject(const char *s, PyObject *filename, int start,
PyCompilerFlags localflags;
perrdetail err;
int iflags = PARSER_FLAGS(flags);
if (flags && flags->cf_feature_version < 7)
iflags |= PyPARSE_ASYNC_HACKS;
node *n = PyParser_ParseStringObject(s, filename,
&_PyParser_Grammar, start, &err,
&iflags);
if (flags == NULL) {
localflags.cf_flags = 0;
localflags.cf_feature_version = PY_MINOR_VERSION;
flags = &localflags;
}
if (n) {
@ -1249,6 +1254,7 @@ PyParser_ASTFromFileObject(FILE *fp, PyObject *filename, const char* enc,
start, ps1, ps2, &err, &iflags);
if (flags == NULL) {
localflags.cf_flags = 0;
localflags.cf_feature_version = PY_MINOR_VERSION;
flags = &localflags;
}
if (n) {