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Issue #26331: Implement the parsing part of PEP 515.

Browse source 
Thanks to Georg Brandl for the patch.
This commit is contained in:
Brett Cannon 2016-09-09 14:57:09 -07:00
parent ee73a65745
commit a721abac29
22 changed files with 743 additions and 205 deletions
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10
Doc/library/decimal.rst
View file

@ -345,7 +345,7 @@ Decimal objects
*value* can be an integer, string, tuple, :class:`float`, or another :class:`Decimal`
object. If no *value* is given, returns ``Decimal('0')``. If *value* is a
string, it should conform to the decimal numeric string syntax after leading
and trailing whitespace characters are removed::
and trailing whitespace characters, as well as underscores throughout, are removed::
sign ::= '+' | '-'
digit ::= '0' | '1' | '2' | '3' | '4' | '5' | '6' | '7' | '8' | '9'
@ -394,6 +394,10 @@ Decimal objects
:class:`float` arguments raise an exception if the :exc:`FloatOperation`
trap is set. By default the trap is off.
.. versionchanged:: 3.6
Underscores are allowed for grouping, as with integral and floating-point
literals in code.
Decimal floating point objects share many properties with the other built-in
numeric types such as :class:`float` and :class:`int`. All of the usual math
operations and special methods apply. Likewise, decimal objects can be
@ -1075,8 +1079,8 @@ In addition to the three supplied contexts, new contexts can be created with the
Decimal('4.44')
This method implements the to-number operation of the IBM specification.
If the argument is a string, no leading or trailing whitespace is
permitted.
If the argument is a string, no leading or trailing whitespace or
underscores are permitted.
.. method:: create_decimal_from_float(f)

16
Doc/library/functions.rst
View file

@ -271,6 +271,9 @@ are always available. They are listed here in alphabetical order.
The complex type is described in :ref:`typesnumeric`.
.. versionchanged:: 3.6
Grouping digits with underscores as in code literals is allowed.
.. function:: delattr(object, name)
@ -531,11 +534,14 @@ are always available. They are listed here in alphabetical order.
The float type is described in :ref:`typesnumeric`.
.. index::
single: __format__
single: string; format() (built-in function)
.. versionchanged:: 3.6
Grouping digits with underscores as in code literals is allowed.
.. index::
single: __format__
single: string; format() (built-in function)
.. function:: format(value[, format_spec])
Convert a *value* to a "formatted" representation, as controlled by
@ -702,6 +708,10 @@ are always available. They are listed here in alphabetical order.
:meth:`base.__int__ <object.__int__>` instead of :meth:`base.__index__
<object.__index__>`.
.. versionchanged:: 3.6
Grouping digits with underscores as in code literals is allowed.
.. function:: isinstance(object, classinfo)
Return true if the *object* argument is an instance of the *classinfo*

45
Doc/reference/lexical_analysis.rst
View file

@ -721,20 +721,24 @@ Integer literals
Integer literals are described by the following lexical definitions:
.. productionlist::
integer: `decimalinteger` | `octinteger` | `hexinteger` | `bininteger`
decimalinteger: `nonzerodigit` `digit`* | "0"+
integer: `decinteger` | `bininteger` | `octinteger` | `hexinteger`
decinteger: `nonzerodigit` (["_"] `digit`)* | "0"+ (["_"] "0")*
bininteger: "0" ("b" | "B") (["_"] `bindigit`)+
octinteger: "0" ("o" | "O") (["_"] `octdigit`)+
hexinteger: "0" ("x" | "X") (["_"] `hexdigit`)+
nonzerodigit: "1"..."9"
digit: "0"..."9"
octinteger: "0" ("o" | "O") `octdigit`+
hexinteger: "0" ("x" | "X") `hexdigit`+
bininteger: "0" ("b" | "B") `bindigit`+
bindigit: "0" | "1"
octdigit: "0"..."7"
hexdigit: `digit` | "a"..."f" | "A"..."F"
bindigit: "0" | "1"
There is no limit for the length of integer literals apart from what can be
stored in available memory.
Underscores are ignored for determining the numeric value of the literal. They
can be used to group digits for enhanced readability. One underscore can occur
between digits, and after base specifiers like ``0x``.
Note that leading zeros in a non-zero decimal number are not allowed. This is
for disambiguation with C-style octal literals, which Python used before version
3.0.
@ -743,6 +747,10 @@ Some examples of integer literals::
7 2147483647 0o177 0b100110111
3 79228162514264337593543950336 0o377 0xdeadbeef
100_000_000_000 0b_1110_0101
.. versionchanged:: 3.6
Underscores are now allowed for grouping purposes in literals.
.. _floating:
@ -754,23 +762,28 @@ Floating point literals are described by the following lexical definitions:
.. productionlist::
floatnumber: `pointfloat` | `exponentfloat`
pointfloat: [`intpart`] `fraction` | `intpart` "."
exponentfloat: (`intpart` | `pointfloat`) `exponent`
intpart: `digit`+
fraction: "." `digit`+
exponent: ("e" | "E") ["+" | "-"] `digit`+
pointfloat: [`digitpart`] `fraction` | `digitpart` "."
exponentfloat: (`digitpart` | `pointfloat`) `exponent`
digitpart: `digit` (["_"] `digit`)*
fraction: "." `digitpart`
exponent: ("e" | "E") ["+" | "-"] `digitpart`
Note that the integer and exponent parts are always interpreted using radix 10.
For example, ``077e010`` is legal, and denotes the same number as ``77e10``. The
allowed range of floating point literals is implementation-dependent. Some
examples of floating point literals::
allowed range of floating point literals is implementation-dependent. As in
integer literals, underscores are supported for digit grouping.
3.14 10. .001 1e100 3.14e-10 0e0
Some examples of floating point literals::
3.14 10. .001 1e100 3.14e-10 0e0 3.14_15_93
Note that numeric literals do not include a sign; a phrase like ``-1`` is
actually an expression composed of the unary operator ``-`` and the literal
``1``.
.. versionchanged:: 3.6
Underscores are now allowed for grouping purposes in literals.
.. _imaginary:
@ -780,7 +793,7 @@ Imaginary literals
Imaginary literals are described by the following lexical definitions:
.. productionlist::
imagnumber: (`floatnumber` | `intpart`) ("j" | "J")
imagnumber: (`floatnumber` | `digitpart`) ("j" | "J")
An imaginary literal yields a complex number with a real part of 0.0. Complex
numbers are represented as a pair of floating point numbers and have the same
@ -788,7 +801,7 @@ restrictions on their range. To create a complex number with a nonzero real
part, add a floating point number to it, e.g., ``(3+4j)``. Some examples of
imaginary literals::
3.14j 10.j 10j .001j 1e100j 3.14e-10j
3.14j 10.j 10j .001j 1e100j 3.14e-10j 3.14_15_93j
.. _operators:

23
Doc/whatsnew/3.6.rst
View file

@ -124,6 +124,29 @@ Windows improvements:
New Features
============
.. _pep-515:
PEP 515: Underscores in Numeric Literals
========================================
Prior to PEP 515, there was no support for writing long numeric
literals with some form of separator to improve readability. For
instance, how big is ``1000000000000000```? With :pep:`515`, though,
you can use underscores to separate digits as desired to make numeric
literals easier to read: ``1_000_000_000_000_000``. Underscores can be
used with other numeric literals beyond integers, e.g.
``0x_FF_FF_FF_FF``.
Single underscores are allowed between digits and after any base
specifier. More than a single underscore in a row, leading, or
trailing underscores are not allowed.
.. seealso::
:pep:`523` - Underscores in Numeric Literals
PEP written by Georg Brandl & Serhiy Storchaka.
.. _pep-523:
PEP 523: Adding a frame evaluation API to CPython

4
Include/pystrtod.h
View file

@ -19,6 +19,10 @@ PyAPI_FUNC(char *) PyOS_double_to_string(double val,
int *type);
#ifndef Py_LIMITED_API
PyAPI_FUNC(PyObject *) _Py_string_to_number_with_underscores(
const char *str, Py_ssize_t len, const char *what, PyObject *obj, void *arg,
PyObject *(*innerfunc)(const char *, Py_ssize_t, void *));
PyAPI_FUNC(double) _Py_parse_inf_or_nan(const char *p, char **endptr);
#endif

10
Lib/_pydecimal.py
View file

@ -589,7 +589,7 @@ def __new__(cls, value="0", context=None):
# From a string
# REs insist on real strings, so we can too.
if isinstance(value, str):
m = _parser(value.strip())
m = _parser(value.strip().replace("_", ""))
if m is None:
if context is None:
context = getcontext()
@ -4125,7 +4125,7 @@ def _set_rounding(self, type):
This will make it round up for that operation.
"""
rounding = self.rounding
self.rounding= type
self.rounding = type
return rounding
def create_decimal(self, num='0'):
@ -4134,10 +4134,10 @@ def create_decimal(self, num='0'):
This method implements the to-number operation of the
IBM Decimal specification."""
if isinstance(num, str) and num != num.strip():
if isinstance(num, str) and (num != num.strip() or '_' in num):
return self._raise_error(ConversionSyntax,
"no trailing or leading whitespace is "
"permitted.")
"trailing or leading whitespace and "
"underscores are not permitted.")
d = Decimal(num, context=self)
if d._isnan() and len(d._int) > self.prec - self.clamp:

14
Lib/test/test_complex.py
View file

@ -1,5 +1,7 @@
import unittest
from test import support
from test.test_grammar import (VALID_UNDERSCORE_LITERALS,
INVALID_UNDERSCORE_LITERALS)
from random import random
from math import atan2, isnan, copysign
@ -377,6 +379,18 @@ def __complex__(self):
self.assertAlmostEqual(complex(complex1(1j)), 2j)
self.assertRaises(TypeError, complex, complex2(1j))
def test_underscores(self):
# check underscores
for lit in VALID_UNDERSCORE_LITERALS:
if not any(ch in lit for ch in 'xXoObB'):
self.assertEqual(complex(lit), eval(lit))
self.assertEqual(complex(lit), complex(lit.replace('_', '')))
for lit in INVALID_UNDERSCORE_LITERALS:
if lit in ('0_7', '09_99'): # octals are not recognized here
continue
if not any(ch in lit for ch in 'xXoObB'):
self.assertRaises(ValueError, complex, lit)
def test_hash(self):
for x in range(-30, 30):
self.assertEqual(hash(x), hash(complex(x, 0)))

10
Lib/test/test_decimal.py
View file

@ -554,6 +554,10 @@ def test_explicit_from_string(self):
self.assertEqual(str(Decimal(' -7.89')), '-7.89')
self.assertEqual(str(Decimal(" 3.45679 ")), '3.45679')
# underscores
self.assertEqual(str(Decimal('1_3.3e4_0')), '1.33E+41')
self.assertEqual(str(Decimal('1_0_0_0')), '1000')
# unicode whitespace
for lead in ["", ' ', '\u00a0', '\u205f']:
for trail in ["", ' ', '\u00a0', '\u205f']:
@ -578,6 +582,9 @@ def test_explicit_from_string(self):
# embedded NUL
self.assertRaises(InvalidOperation, Decimal, "12\u00003")
# underscores don't prevent errors
self.assertRaises(InvalidOperation, Decimal, "1_2_\u00003")
@cpython_only
def test_from_legacy_strings(self):
import _testcapi
@ -772,6 +779,9 @@ def test_explicit_context_create_decimal(self):
self.assertRaises(InvalidOperation, nc.create_decimal, "xyz")
self.assertRaises(ValueError, nc.create_decimal, (1, "xyz", -25))
self.assertRaises(TypeError, nc.create_decimal, "1234", "5678")
# no whitespace and underscore stripping is done with this method
self.assertRaises(InvalidOperation, nc.create_decimal, " 1234")
self.assertRaises(InvalidOperation, nc.create_decimal, "12_34")
# too many NaN payload digits
nc.prec = 3

24
Lib/test/test_float.py
View file

@ -1,4 +1,3 @@
import fractions
import operator
import os
@ -9,6 +8,8 @@
import unittest
from test import support
from test.test_grammar import (VALID_UNDERSCORE_LITERALS,
INVALID_UNDERSCORE_LITERALS)
from math import isinf, isnan, copysign, ldexp
INF = float("inf")
@ -60,6 +61,27 @@ def test_float(self):
float(b'.' + b'1'*1000)
float('.' + '1'*1000)
def test_underscores(self):
for lit in VALID_UNDERSCORE_LITERALS:
if not any(ch in lit for ch in 'jJxXoObB'):
self.assertEqual(float(lit), eval(lit))
self.assertEqual(float(lit), float(lit.replace('_', '')))
for lit in INVALID_UNDERSCORE_LITERALS:
if lit in ('0_7', '09_99'): # octals are not recognized here
continue
if not any(ch in lit for ch in 'jJxXoObB'):
self.assertRaises(ValueError, float, lit)
# Additional test cases; nan and inf are never valid as literals,
# only in the float() constructor, but we don't allow underscores
# in or around them.
self.assertRaises(ValueError, float, '_NaN')
self.assertRaises(ValueError, float, 'Na_N')
self.assertRaises(ValueError, float, 'IN_F')
self.assertRaises(ValueError, float, '-_INF')
self.assertRaises(ValueError, float, '-INF_')
# Check that we handle bytes values correctly.
self.assertRaises(ValueError, float, b'0_.\xff9')
def test_non_numeric_input_types(self):
# Test possible non-numeric types for the argument x, including
# subclasses of the explicitly documented accepted types.

89
Lib/test/test_grammar.py
View file

@ -16,6 +16,87 @@
from test import ann_module2
import test
# These are shared with test_tokenize and other test modules.
#
# Note: since several test cases filter out floats by looking for "e" and ".",
# don't add hexadecimal literals that contain "e" or "E".
VALID_UNDERSCORE_LITERALS = [
'0_0_0',
'4_2',
'1_0000_0000',
'0b1001_0100',
'0xffff_ffff',
'0o5_7_7',
'1_00_00.5',
'1_00_00.5e5',
'1_00_00e5_1',
'1e1_0',
'.1_4',
'.1_4e1',
'0b_0',
'0x_f',
'0o_5',
'1_00_00j',
'1_00_00.5j',
'1_00_00e5_1j',
'.1_4j',
'(1_2.5+3_3j)',
'(.5_6j)',
]
INVALID_UNDERSCORE_LITERALS = [
# Trailing underscores:
'0_',
'42_',
'1.4j_',
'0x_',
'0b1_',
'0xf_',
'0o5_',
'0 if 1_Else 1',
# Underscores in the base selector:
'0_b0',
'0_xf',
'0_o5',
# Old-style octal, still disallowed:
'0_7',
'09_99',
# Multiple consecutive underscores:
'4_______2',
'0.1__4',
'0.1__4j',
'0b1001__0100',
'0xffff__ffff',
'0x___',
'0o5__77',
'1e1__0',
'1e1__0j',
# Underscore right before a dot:
'1_.4',
'1_.4j',
# Underscore right after a dot:
'1._4',
'1._4j',
'._5',
'._5j',
# Underscore right after a sign:
'1.0e+_1',
'1.0e+_1j',
# Underscore right before j:
'1.4_j',
'1.4e5_j',
# Underscore right before e:
'1_e1',
'1.4_e1',
'1.4_e1j',
# Underscore right after e:
'1e_1',
'1.4e_1',
'1.4e_1j',
# Complex cases with parens:
'(1+1.5_j_)',
'(1+1.5_j)',
]
class TokenTests(unittest.TestCase):
@ -95,6 +176,14 @@ def test_float_exponent_tokenization(self):
self.assertEqual(1 if 0else 0, 0)
self.assertRaises(SyntaxError, eval, "0 if 1Else 0")
def test_underscore_literals(self):
for lit in VALID_UNDERSCORE_LITERALS:
self.assertEqual(eval(lit), eval(lit.replace('_', '')))
for lit in INVALID_UNDERSCORE_LITERALS:
self.assertRaises(SyntaxError, eval, lit)
# Sanity check: no literal begins with an underscore
self.assertRaises(NameError, eval, "_0")
def test_string_literals(self):
x = ''; y = ""; self.assertTrue(len(x) == 0 and x == y)
x = '\''; y = "'"; self.assertTrue(len(x) == 1 and x == y and ord(x) == 39)

21
Lib/test/test_int.py
View file

@ -2,6 +2,8 @@
import unittest
from test import support
from test.test_grammar import (VALID_UNDERSCORE_LITERALS,
INVALID_UNDERSCORE_LITERALS)
L = [
('0', 0),
@ -212,6 +214,25 @@ def test_basic(self):
self.assertEqual(int('2br45qc', 35), 4294967297)
self.assertEqual(int('1z141z5', 36), 4294967297)
def test_underscores(self):
for lit in VALID_UNDERSCORE_LITERALS:
if any(ch in lit for ch in '.eEjJ'):
continue
self.assertEqual(int(lit, 0), eval(lit))
self.assertEqual(int(lit, 0), int(lit.replace('_', ''), 0))
for lit in INVALID_UNDERSCORE_LITERALS:
if any(ch in lit for ch in '.eEjJ'):
continue
self.assertRaises(ValueError, int, lit, 0)
# Additional test cases with bases != 0, only for the constructor:
self.assertEqual(int("1_00", 3), 9)
self.assertEqual(int("0_100"), 100) # not valid as a literal!
self.assertEqual(int(b"1_00"), 100) # byte underscore
self.assertRaises(ValueError, int, "_100")
self.assertRaises(ValueError, int, "+_100")
self.assertRaises(ValueError, int, "1__00")
self.assertRaises(ValueError, int, "100_")
@support.cpython_only
def test_small_ints(self):
# Bug #3236: Return small longs from PyLong_FromString

30
Lib/test/test_tokenize.py
View file

@ -3,7 +3,9 @@
STRING, ENDMARKER, ENCODING, tok_name, detect_encoding,
open as tokenize_open, Untokenizer)
from io import BytesIO
from unittest import TestCase, mock, main
from unittest import TestCase, mock
from test.test_grammar import (VALID_UNDERSCORE_LITERALS,
INVALID_UNDERSCORE_LITERALS)
import os
import token
@ -185,6 +187,21 @@ def test_float(self):
NUMBER '3.14e159' (1, 4) (1, 12)
""")
def test_underscore_literals(self):
def number_token(s):
f = BytesIO(s.encode('utf-8'))
for toktype, token, start, end, line in tokenize(f.readline):
if toktype == NUMBER:
return token
return 'invalid token'
for lit in VALID_UNDERSCORE_LITERALS:
if '(' in lit:
# this won't work with compound complex inputs
continue
self.assertEqual(number_token(lit), lit)
for lit in INVALID_UNDERSCORE_LITERALS:
self.assertNotEqual(number_token(lit), lit)
def test_string(self):
# String literals
self.check_tokenize("x = ''; y = \"\"", """\
@ -1529,11 +1546,10 @@ def test_random_files(self):
tempdir = os.path.dirname(fn) or os.curdir
testfiles = glob.glob(os.path.join(tempdir, "test*.py"))
# Tokenize is broken on test_unicode_identifiers.py because regular
# expressions are broken on the obscure unicode identifiers in it.
# *sigh* With roundtrip extended to test the 5-tuple mode of
# untokenize, 7 more testfiles fail. Remove them also until the
# failure is diagnosed.
# Tokenize is broken on test_pep3131.py because regular expressions are
# broken on the obscure unicode identifiers in it. *sigh*
# With roundtrip extended to test the 5-tuple mode of untokenize,
# 7 more testfiles fail. Remove them also until the failure is diagnosed.
testfiles.remove(os.path.join(tempdir, "test_unicode_identifiers.py"))
for f in ('buffer', 'builtin', 'fileio', 'inspect', 'os', 'platform', 'sys'):
@ -1565,4 +1581,4 @@ def test_indentation_semantics_retained(self):
if __name__ == "__main__":
main()
unittest.main()

1
Lib/test/test_types.py
View file

@ -48,6 +48,7 @@ def test_comparisons(self):
def test_float_constructor(self):
self.assertRaises(ValueError, float, '')
self.assertRaises(ValueError, float, '5\0')
self.assertRaises(ValueError, float, '5_5\0')
def test_zero_division(self):
try: 5.0 / 0.0

17
Lib/tokenize.py
View file

@ -120,16 +120,17 @@ def maybe(*choices): return group(*choices) + '?'
Ignore = Whitespace + any(r'\\\r?\n' + Whitespace) + maybe(Comment)
Name = r'\w+'
Hexnumber = r'0[xX][0-9a-fA-F]+'
Binnumber = r'0[bB][01]+'
Octnumber = r'0[oO][0-7]+'
Decnumber = r'(?:0+|[1-9][0-9]*)'
Hexnumber = r'0[xX](?:_?[0-9a-fA-F])+'
Binnumber = r'0[bB](?:_?[01])+'
Octnumber = r'0[oO](?:_?[0-7])+'
Decnumber = r'(?:0(?:_?0)*|[1-9](?:_?[0-9])*)'
Intnumber = group(Hexnumber, Binnumber, Octnumber, Decnumber)
Exponent = r'[eE][-+]?[0-9]+'
Pointfloat = group(r'[0-9]+\.[0-9]*', r'\.[0-9]+') + maybe(Exponent)
Expfloat = r'[0-9]+' + Exponent
Exponent = r'[eE][-+]?[0-9](?:_?[0-9])*'
Pointfloat = group(r'[0-9](?:_?[0-9])*\.(?:[0-9](?:_?[0-9])*)?',
r'\.[0-9](?:_?[0-9])*') + maybe(Exponent)
Expfloat = r'[0-9](?:_?[0-9])*' + Exponent
Floatnumber = group(Pointfloat, Expfloat)
Imagnumber = group(r'[0-9]+[jJ]', Floatnumber + r'[jJ]')
Imagnumber = group(r'[0-9](?:_?[0-9])*[jJ]', Floatnumber + r'[jJ]')
Number = group(Imagnumber, Floatnumber, Intnumber)
# Return the empty string, plus all of the valid string prefixes.

6
Misc/NEWS
View file

@ -17,6 +17,8 @@ Core and Builtins
efficient bytecode. Patch by Demur Rumed, design by Serhiy Storchaka,
reviewed by Serhiy Storchaka and Victor Stinner.
- Issue #26331: Implement tokenizing support for PEP 515. Patch by Georg Brandl.
- Issue #27999: Make "global after use" a SyntaxError, and ditto for nonlocal.
Patch by Ivan Levkivskyi.
@ -2678,7 +2680,7 @@ Library
- Issue #24774: Fix docstring in http.server.test. Patch from Chiu-Hsiang Hsu.
- Issue #21159: Improve message in configparser.InterpolationMissingOptionError.
Patch from Å?ukasz Langa.
Patch from <EFBFBD>?ukasz Langa.
- Issue #20362: Honour TestCase.longMessage correctly in assertRegex.
Patch from Ilia Kurenkov.
@ -4606,7 +4608,7 @@ Library
Based on patch by Martin Panter.
- Issue #17293: uuid.getnode() now determines MAC address on AIX using netstat.
Based on patch by Aivars KalvÄ?ns.
Based on patch by Aivars Kalv<EFBFBD>?ns.
- Issue #22769: Fixed ttk.Treeview.tag_has() when called without arguments.

12
Modules/_decimal/_decimal.c
View file

@ -1889,12 +1889,13 @@ is_space(enum PyUnicode_Kind kind, void *data, Py_ssize_t pos)
/* Return the ASCII representation of a numeric Unicode string. The numeric
string may contain ascii characters in the range [1, 127], any Unicode
space and any unicode digit. If strip_ws is true, leading and trailing
whitespace is stripped.
whitespace is stripped. If ignore_underscores is true, underscores are
ignored.
Return NULL if malloc fails and an empty string if invalid characters
are found. */
static char *
numeric_as_ascii(const PyObject *u, int strip_ws)
numeric_as_ascii(const PyObject *u, int strip_ws, int ignore_underscores)
{
enum PyUnicode_Kind kind;
void *data;
@ -1929,6 +1930,9 @@ numeric_as_ascii(const PyObject *u, int strip_ws)
for (; j < len; j++) {
ch = PyUnicode_READ(kind, data, j);
if (ignore_underscores && ch == '_') {
continue;
}
if (0 < ch && ch <= 127) {
*cp++ = ch;
continue;
@ -2011,7 +2015,7 @@ PyDecType_FromUnicode(PyTypeObject *type, const PyObject *u,
PyObject *dec;
char *s;
s = numeric_as_ascii(u, 0);
s = numeric_as_ascii(u, 0, 0);
if (s == NULL) {
return NULL;
}
@ -2031,7 +2035,7 @@ PyDecType_FromUnicodeExactWS(PyTypeObject *type, const PyObject *u,
PyObject *dec;
char *s;
s = numeric_as_ascii(u, 1);
s = numeric_as_ascii(u, 1, 1);
if (s == NULL) {
return NULL;
}

63
Objects/complexobject.c
View file

@ -759,29 +759,12 @@ static PyMemberDef complex_members[] = {
};
static PyObject *
complex_subtype_from_string(PyTypeObject *type, PyObject *v)
complex_from_string_inner(const char *s, Py_ssize_t len, void *type)
{
const char *s, *start;
char *end;
double x=0.0, y=0.0, z;
int got_bracket=0;
PyObject *s_buffer = NULL;
Py_ssize_t len;
if (PyUnicode_Check(v)) {
s_buffer = _PyUnicode_TransformDecimalAndSpaceToASCII(v);
if (s_buffer == NULL)
return NULL;
s = PyUnicode_AsUTF8AndSize(s_buffer, &len);
if (s == NULL)
goto error;
}
else {
PyErr_Format(PyExc_TypeError,
"complex() argument must be a string or a number, not '%.200s'",
Py_TYPE(v)->tp_name);
return NULL;
}
const char *start;
char *end;
/* position on first nonblank */
start = s;
@ -822,7 +805,7 @@ complex_subtype_from_string(PyTypeObject *type, PyObject *v)
if (PyErr_ExceptionMatches(PyExc_ValueError))
PyErr_Clear();
else
goto error;
return NULL;
}
if (end != s) {
/* all 4 forms starting with <float> land here */
@ -835,7 +818,7 @@ complex_subtype_from_string(PyTypeObject *type, PyObject *v)
if (PyErr_ExceptionMatches(PyExc_ValueError))
PyErr_Clear();
else
goto error;
return NULL;
}
if (end != s)
/* <float><signed-float>j */
@ -890,17 +873,45 @@ complex_subtype_from_string(PyTypeObject *type, PyObject *v)
if (s-start != len)
goto parse_error;
Py_XDECREF(s_buffer);
return complex_subtype_from_doubles(type, x, y);
return complex_subtype_from_doubles((PyTypeObject *)type, x, y);
parse_error:
PyErr_SetString(PyExc_ValueError,
"complex() arg is a malformed string");
error:
Py_XDECREF(s_buffer);
return NULL;
}
static PyObject *
complex_subtype_from_string(PyTypeObject *type, PyObject *v)
{
const char *s;
PyObject *s_buffer = NULL, *result = NULL;
Py_ssize_t len;
if (PyUnicode_Check(v)) {
s_buffer = _PyUnicode_TransformDecimalAndSpaceToASCII(v);
if (s_buffer == NULL) {
return NULL;
}
s = PyUnicode_AsUTF8AndSize(s_buffer, &len);
if (s == NULL) {
goto exit;
}
}
else {
PyErr_Format(PyExc_TypeError,
"complex() argument must be a string or a number, not '%.200s'",
Py_TYPE(v)->tp_name);
return NULL;
}
result = _Py_string_to_number_with_underscores(s, len, "complex", v, type,
complex_from_string_inner);
exit:
Py_DECREF(s_buffer);
return result;
}
static PyObject *
complex_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
{

59
Objects/floatobject.c
View file

@ -124,11 +124,43 @@ PyFloat_FromDouble(double fval)
return (PyObject *) op;
}
static PyObject *
float_from_string_inner(const char *s, Py_ssize_t len, void *obj)
{
double x;
const char *end;
const char *last = s + len;
/* strip space */
while (s < last && Py_ISSPACE(*s)) {
s++;
}
while (s < last - 1 && Py_ISSPACE(last[-1])) {
last--;
}
/* We don't care about overflow or underflow. If the platform
* supports them, infinities and signed zeroes (on underflow) are
* fine. */
x = PyOS_string_to_double(s, (char **)&end, NULL);
if (end != last) {
PyErr_Format(PyExc_ValueError,
"could not convert string to float: "
"%R", obj);
return NULL;
}
else if (x == -1.0 && PyErr_Occurred()) {
return NULL;
}
else {
return PyFloat_FromDouble(x);
}
}
PyObject *
PyFloat_FromString(PyObject *v)
{
const char *s, *last, *end;
double x;
const char *s;
PyObject *s_buffer = NULL;
Py_ssize_t len;
Py_buffer view = {NULL, NULL};
@ -169,27 +201,8 @@ PyFloat_FromString(PyObject *v)
Py_TYPE(v)->tp_name);
return NULL;
}
last = s + len;
/* strip space */
while (s < last && Py_ISSPACE(*s))
s++;
while (s < last - 1 && Py_ISSPACE(last[-1]))
last--;
/* We don't care about overflow or underflow. If the platform
* supports them, infinities and signed zeroes (on underflow) are
* fine. */
x = PyOS_string_to_double(s, (char **)&end, NULL);
if (end != last) {
PyErr_Format(PyExc_ValueError,
"could not convert string to float: "
"%R", v);
result = NULL;
}
else if (x == -1.0 && PyErr_Occurred())
result = NULL;
else
result = PyFloat_FromDouble(x);
result = _Py_string_to_number_with_underscores(s, len, "float", v, v,
float_from_string_inner);
PyBuffer_Release(&view);
Py_XDECREF(s_buffer);
return result;

169
Objects/longobject.c
View file

@ -2004,12 +2004,18 @@ unsigned char _PyLong_DigitValue[256] = {
* non-digit (which may be *str!). A normalized int is returned.
* The point to this routine is that it takes time linear in the number of
* string characters.
*
* Return values:
* -1 on syntax error (exception needs to be set, *res is untouched)
* 0 else (exception may be set, in that case *res is set to NULL)
*/
static PyLongObject *
long_from_binary_base(const char **str, int base)
static int
long_from_binary_base(const char **str, int base, PyLongObject **res)
{
const char *p = *str;
const char *start = p;
char prev = 0;
int digits = 0;
int bits_per_char;
Py_ssize_t n;
PyLongObject *z;
@ -2019,23 +2025,43 @@ long_from_binary_base(const char **str, int base)
assert(base >= 2 && base <= 32 && (base & (base - 1)) == 0);
n = base;
for (bits_per_char = -1; n; ++bits_per_char)
for (bits_per_char = -1; n; ++bits_per_char) {
n >>= 1;
/* n <- total # of bits needed, while setting p to end-of-string */
while (_PyLong_DigitValue[Py_CHARMASK(*p)] < base)
}
/* count digits and set p to end-of-string */
while (_PyLong_DigitValue[Py_CHARMASK(*p)] < base || *p == '_') {
if (*p == '_') {
if (prev == '_') {
*str = p - 1;
return -1;
}
} else {
++digits;
}
prev = *p;
++p;
}
if (prev == '_') {
/* Trailing underscore not allowed. */
*str = p - 1;
return -1;
}
*str = p;
/* n <- # of Python digits needed, = ceiling(n/PyLong_SHIFT). */
n = (p - start) * bits_per_char + PyLong_SHIFT - 1;
n = digits * bits_per_char + PyLong_SHIFT - 1;
if (n / bits_per_char < p - start) {
PyErr_SetString(PyExc_ValueError,
"int string too large to convert");
return NULL;
*res = NULL;
return 0;
}
n = n / PyLong_SHIFT;
z = _PyLong_New(n);
if (z == NULL)
return NULL;
if (z == NULL) {
*res = NULL;
return 0;
}
/* Read string from right, and fill in int from left; i.e.,
* from least to most significant in both.
*/
@ -2043,7 +2069,11 @@ long_from_binary_base(const char **str, int base)
bits_in_accum = 0;
pdigit = z->ob_digit;
while (--p >= start) {
int k = (int)_PyLong_DigitValue[Py_CHARMASK(*p)];
int k;
if (*p == '_') {
continue;
}
k = (int)_PyLong_DigitValue[Py_CHARMASK(*p)];
assert(k >= 0 && k < base);
accum |= (twodigits)k << bits_in_accum;
bits_in_accum += bits_per_char;
@ -2062,7 +2092,8 @@ long_from_binary_base(const char **str, int base)
}
while (pdigit - z->ob_digit < n)
*pdigit++ = 0;
return long_normalize(z);
*res = long_normalize(z);
return 0;
}
/* Parses an int from a bytestring. Leading and trailing whitespace will be
@ -2087,23 +2118,29 @@ PyLong_FromString(const char *str, char **pend, int base)
"int() arg 2 must be >= 2 and <= 36");
return NULL;
}
while (*str != '\0' && Py_ISSPACE(Py_CHARMASK(*str)))
while (*str != '\0' && Py_ISSPACE(Py_CHARMASK(*str))) {
str++;
if (*str == '+')
}
if (*str == '+') {
++str;
}
else if (*str == '-') {
++str;
sign = -1;
}
if (base == 0) {
if (str[0] != '0')
if (str[0] != '0') {
base = 10;
else if (str[1] == 'x' || str[1] == 'X')
}
else if (str[1] == 'x' || str[1] == 'X') {
base = 16;
else if (str[1] == 'o' || str[1] == 'O')
}
else if (str[1] == 'o' || str[1] == 'O') {
base = 8;
else if (str[1] == 'b' || str[1] == 'B')
}
else if (str[1] == 'b' || str[1] == 'B') {
base = 2;
}
else {
/* "old" (C-style) octal literal, now invalid.
it might still be zero though */
@ -2114,12 +2151,26 @@ PyLong_FromString(const char *str, char **pend, int base)
if (str[0] == '0' &&
((base == 16 && (str[1] == 'x' || str[1] == 'X')) ||
(base == 8 && (str[1] == 'o' || str[1] == 'O')) ||
(base == 2 && (str[1] == 'b' || str[1] == 'B'))))
(base == 2 && (str[1] == 'b' || str[1] == 'B')))) {
str += 2;
/* One underscore allowed here. */
if (*str == '_') {
++str;
}
}
if (str[0] == '_') {
/* May not start with underscores. */
goto onError;
}
start = str;
if ((base & (base - 1)) == 0)
z = long_from_binary_base(&str, base);
if ((base & (base - 1)) == 0) {
int res = long_from_binary_base(&str, base, &z);
if (res < 0) {
/* Syntax error. */
goto onError;
}
}
else {
/***
Binary bases can be converted in time linear in the number of digits, because
@ -2208,11 +2259,13 @@ digit beyond the first.
***/
twodigits c; /* current input character */
Py_ssize_t size_z;
int digits = 0;
int i;
int convwidth;
twodigits convmultmax, convmult;
digit *pz, *pzstop;
const char* scan;
const char *scan, *lastdigit;
char prev = 0;
static double log_base_BASE[37] = {0.0e0,};
static int convwidth_base[37] = {0,};
@ -2226,8 +2279,9 @@ digit beyond the first.
log((double)PyLong_BASE));
for (;;) {
twodigits next = convmax * base;
if (next > PyLong_BASE)
if (next > PyLong_BASE) {
break;
}
convmax = next;
++i;
}
@ -2238,21 +2292,43 @@ digit beyond the first.
/* Find length of the string of numeric characters. */
scan = str;
while (_PyLong_DigitValue[Py_CHARMASK(*scan)] < base)
lastdigit = str;
while (_PyLong_DigitValue[Py_CHARMASK(*scan)] < base || *scan == '_') {
if (*scan == '_') {
if (prev == '_') {
/* Only one underscore allowed. */
str = lastdigit + 1;
goto onError;
}
}
else {
++digits;
lastdigit = scan;
}
prev = *scan;
++scan;
}
if (prev == '_') {
/* Trailing underscore not allowed. */
/* Set error pointer to first underscore. */
str = lastdigit + 1;
goto onError;
}
/* Create an int object that can contain the largest possible
* integer with this base and length. Note that there's no
* need to initialize z->ob_digit -- no slot is read up before
* being stored into.
*/
size_z = (Py_ssize_t)((scan - str) * log_base_BASE[base]) + 1;
size_z = (Py_ssize_t)(digits * log_base_BASE[base]) + 1;
/* Uncomment next line to test exceedingly rare copy code */
/* size_z = 1; */
assert(size_z > 0);
z = _PyLong_New(size_z);
if (z == NULL)
if (z == NULL) {
return NULL;
}
Py_SIZE(z) = 0;
/* `convwidth` consecutive input digits are treated as a single
@ -2263,9 +2339,17 @@ digit beyond the first.
/* Work ;-) */
while (str < scan) {
if (*str == '_') {
str++;
continue;
}
/* grab up to convwidth digits from the input string */
c = (digit)_PyLong_DigitValue[Py_CHARMASK(*str++)];
for (i = 1; i < convwidth && str != scan; ++i, ++str) {
for (i = 1; i < convwidth && str != scan; ++str) {
if (*str == '_') {
continue;
}
i++;
c = (twodigits)(c * base +
(int)_PyLong_DigitValue[Py_CHARMASK(*str)]);
assert(c < PyLong_BASE);
@ -2277,8 +2361,9 @@ digit beyond the first.
*/
if (i != convwidth) {
convmult = base;
for ( ; i > 1; --i)
for ( ; i > 1; --i) {
convmult *= base;
}
}
/* Multiply z by convmult, and add c. */
@ -2316,41 +2401,51 @@ digit beyond the first.
}
}
}
if (z == NULL)
if (z == NULL) {
return NULL;
}
if (error_if_nonzero) {
/* reset the base to 0, else the exception message
doesn't make too much sense */
base = 0;
if (Py_SIZE(z) != 0)
if (Py_SIZE(z) != 0) {
goto onError;
}
/* there might still be other problems, therefore base
remains zero here for the same reason */
}
if (str == start)
if (str == start) {
goto onError;
if (sign < 0)
}
if (sign < 0) {
Py_SIZE(z) = -(Py_SIZE(z));
while (*str && Py_ISSPACE(Py_CHARMASK(*str)))
}
while (*str && Py_ISSPACE(Py_CHARMASK(*str))) {
str++;
if (*str != '\0')
}
if (*str != '\0') {
goto onError;
}
long_normalize(z);
z = maybe_small_long(z);
if (z == NULL)
if (z == NULL) {
return NULL;
if (pend != NULL)
}
if (pend != NULL) {
*pend = (char *)str;
}
return (PyObject *) z;
onError:
if (pend != NULL)
if (pend != NULL) {
*pend = (char *)str;
}
Py_XDECREF(z);
slen = strlen(orig_str) < 200 ? strlen(orig_str) : 200;
strobj = PyUnicode_FromStringAndSize(orig_str, slen);
if (strobj == NULL)
if (strobj == NULL) {
return NULL;
}
PyErr_Format(PyExc_ValueError,
"invalid literal for int() with base %d: %.200R",
base, strobj);

232
Parser/tokenizer.c
View file

@ -1333,6 +1333,28 @@ verify_identifier(struct tok_state *tok)
}
#endif
static int
tok_decimal_tail(struct tok_state *tok)
{
int c;
while (1) {
do {
c = tok_nextc(tok);
} while (isdigit(c));
if (c != '_') {
break;
}
c = tok_nextc(tok);
if (!isdigit(c)) {
tok->done = E_TOKEN;
tok_backup(tok, c);
return 0;
}
}
return c;
}
/* Get next token, after space stripping etc. */
static int
@ -1353,17 +1375,20 @@ tok_get(struct tok_state *tok, char **p_start, char **p_end)
tok->atbol = 0;
for (;;) {
c = tok_nextc(tok);
if (c == ' ')
if (c == ' ') {
col++, altcol++;
}
else if (c == '\t') {
col = (col/tok->tabsize + 1) * tok->tabsize;
altcol = (altcol/tok->alttabsize + 1)
* tok->alttabsize;
}
else if (c == '\014') /* Control-L (formfeed) */
else if (c == '\014') {/* Control-L (formfeed) */
col = altcol = 0; /* For Emacs users */
else
}
else {
break;
}
}
tok_backup(tok, c);
if (c == '#' || c == '\n') {
@ -1372,10 +1397,12 @@ tok_get(struct tok_state *tok, char **p_start, char **p_end)
not passed to the parser as NEWLINE tokens,
except *totally* empty lines in interactive
mode, which signal the end of a command group. */
if (col == 0 && c == '\n' && tok->prompt != NULL)
if (col == 0 && c == '\n' && tok->prompt != NULL) {
blankline = 0; /* Let it through */
else
}
else {
blankline = 1; /* Ignore completely */
}
/* We can't jump back right here since we still
may need to skip to the end of a comment */
}
@ -1383,8 +1410,9 @@ tok_get(struct tok_state *tok, char **p_start, char **p_end)
if (col == tok->indstack[tok->indent]) {
/* No change */
if (altcol != tok->altindstack[tok->indent]) {
if (indenterror(tok))
if (indenterror(tok)) {
return ERRORTOKEN;
}
}
}
else if (col > tok->indstack[tok->indent]) {
@ -1395,8 +1423,9 @@ tok_get(struct tok_state *tok, char **p_start, char **p_end)
return ERRORTOKEN;
}
if (altcol <= tok->altindstack[tok->indent]) {
if (indenterror(tok))
if (indenterror(tok)) {
return ERRORTOKEN;
}
}
tok->pendin++;
tok->indstack[++tok->indent] = col;
@ -1415,8 +1444,9 @@ tok_get(struct tok_state *tok, char **p_start, char **p_end)
return ERRORTOKEN;
}
if (altcol != tok->altindstack[tok->indent]) {
if (indenterror(tok))
if (indenterror(tok)) {
return ERRORTOKEN;
}
}
}
}
@ -1462,9 +1492,11 @@ tok_get(struct tok_state *tok, char **p_start, char **p_end)
tok->start = tok->cur - 1;
/* Skip comment */
if (c == '#')
while (c != EOF && c != '\n')
if (c == '#') {
while (c != EOF && c != '\n') {
c = tok_nextc(tok);
}
}
/* Check for EOF and errors now */
if (c == EOF) {
@ -1481,27 +1513,35 @@ tok_get(struct tok_state *tok, char **p_start, char **p_end)
saw_b = 1;
/* Since this is a backwards compatibility support literal we don't
want to support it in arbitrary order like byte literals. */
else if (!(saw_b || saw_u || saw_r || saw_f) && (c == 'u' || c == 'U'))
else if (!(saw_b || saw_u || saw_r || saw_f)
&& (c == 'u'|| c == 'U')) {
saw_u = 1;
}
/* ur"" and ru"" are not supported */
else if (!(saw_r || saw_u) && (c == 'r' || c == 'R'))
else if (!(saw_r || saw_u) && (c == 'r' || c == 'R')) {
saw_r = 1;
else if (!(saw_f || saw_b || saw_u) && (c == 'f' || c == 'F'))
}
else if (!(saw_f || saw_b || saw_u) && (c == 'f' || c == 'F')) {
saw_f = 1;
else
}
else {
break;
}
c = tok_nextc(tok);
if (c == '"' || c == '\'')
if (c == '"' || c == '\'') {
goto letter_quote;
}
}
while (is_potential_identifier_char(c)) {
if (c >= 128)
if (c >= 128) {
nonascii = 1;
}
c = tok_nextc(tok);
}
tok_backup(tok, c);
if (nonascii && !verify_identifier(tok))
if (nonascii && !verify_identifier(tok)) {
return ERRORTOKEN;
}
*p_start = tok->start;
*p_end = tok->cur;
@ -1510,10 +1550,12 @@ tok_get(struct tok_state *tok, char **p_start, char **p_end)
/* Current token length is 5. */
if (tok->async_def) {
/* We're inside an 'async def' function. */
if (memcmp(tok->start, "async", 5) == 0)
if (memcmp(tok->start, "async", 5) == 0) {
return ASYNC;
if (memcmp(tok->start, "await", 5) == 0)
}
if (memcmp(tok->start, "await", 5) == 0) {
return AWAIT;
}
}
else if (memcmp(tok->start, "async", 5) == 0) {
/* The current token is 'async'.
@ -1546,8 +1588,9 @@ tok_get(struct tok_state *tok, char **p_start, char **p_end)
/* Newline */
if (c == '\n') {
tok->atbol = 1;
if (blankline || tok->level > 0)
if (blankline || tok->level > 0) {
goto nextline;
}
*p_start = tok->start;
*p_end = tok->cur - 1; /* Leave '\n' out of the string */
tok->cont_line = 0;
@ -1570,11 +1613,13 @@ tok_get(struct tok_state *tok, char **p_start, char **p_end)
*p_start = tok->start;
*p_end = tok->cur;
return ELLIPSIS;
} else {
}
else {
tok_backup(tok, c);
}
tok_backup(tok, '.');
} else {
}
else {
tok_backup(tok, c);
}
*p_start = tok->start;
@ -1588,59 +1633,93 @@ tok_get(struct tok_state *tok, char **p_start, char **p_end)
/* Hex, octal or binary -- maybe. */
c = tok_nextc(tok);
if (c == 'x' || c == 'X') {
/* Hex */
c = tok_nextc(tok);
if (!isxdigit(c)) {
tok->done = E_TOKEN;
tok_backup(tok, c);
return ERRORTOKEN;
}
do {
c = tok_nextc(tok);
} while (isxdigit(c));
if (c == '_') {
c = tok_nextc(tok);
}
if (!isxdigit(c)) {
tok->done = E_TOKEN;
tok_backup(tok, c);
return ERRORTOKEN;
}
do {
c = tok_nextc(tok);
} while (isxdigit(c));
} while (c == '_');
}
else if (c == 'o' || c == 'O') {
/* Octal */
c = tok_nextc(tok);
if (c < '0' || c >= '8') {
tok->done = E_TOKEN;
tok_backup(tok, c);
return ERRORTOKEN;
}
do {
c = tok_nextc(tok);
} while ('0' <= c && c < '8');
if (c == '_') {
c = tok_nextc(tok);
}
if (c < '0' || c >= '8') {
tok->done = E_TOKEN;
tok_backup(tok, c);
return ERRORTOKEN;
}
do {
c = tok_nextc(tok);
} while ('0' <= c && c < '8');
} while (c == '_');
}
else if (c == 'b' || c == 'B') {
/* Binary */
c = tok_nextc(tok);
if (c != '0' && c != '1') {
tok->done = E_TOKEN;
tok_backup(tok, c);
return ERRORTOKEN;
}
do {
c = tok_nextc(tok);
} while (c == '0' || c == '1');
if (c == '_') {
c = tok_nextc(tok);
}
if (c != '0' && c != '1') {
tok->done = E_TOKEN;
tok_backup(tok, c);
return ERRORTOKEN;
}
do {
c = tok_nextc(tok);
} while (c == '0' || c == '1');
} while (c == '_');
}
else {
int nonzero = 0;
/* maybe old-style octal; c is first char of it */
/* in any case, allow '0' as a literal */
while (c == '0')
c = tok_nextc(tok);
while (isdigit(c)) {
nonzero = 1;
while (1) {
if (c == '_') {
c = tok_nextc(tok);
if (!isdigit(c)) {
tok->done = E_TOKEN;
tok_backup(tok, c);
return ERRORTOKEN;
}
}
if (c != '0') {
break;
}
c = tok_nextc(tok);
}
if (c == '.')
if (isdigit(c)) {
nonzero = 1;
c = tok_decimal_tail(tok);
if (c == 0) {
return ERRORTOKEN;
}
}
if (c == '.') {
c = tok_nextc(tok);
goto fraction;
else if (c == 'e' || c == 'E')
}
else if (c == 'e' || c == 'E') {
goto exponent;
else if (c == 'j' || c == 'J')
}
else if (c == 'j' || c == 'J') {
goto imaginary;
}
else if (nonzero) {
/* Old-style octal: now disallowed. */
tok->done = E_TOKEN;
tok_backup(tok, c);
return ERRORTOKEN;
@ -1649,17 +1728,22 @@ tok_get(struct tok_state *tok, char **p_start, char **p_end)
}
else {
/* Decimal */
do {
c = tok_nextc(tok);
} while (isdigit(c));
c = tok_decimal_tail(tok);
if (c == 0) {
return ERRORTOKEN;
}
{
/* Accept floating point numbers. */
if (c == '.') {
c = tok_nextc(tok);
fraction:
/* Fraction */
do {
c = tok_nextc(tok);
} while (isdigit(c));
if (isdigit(c)) {
c = tok_decimal_tail(tok);
if (c == 0) {
return ERRORTOKEN;
}
}
}
if (c == 'e' || c == 'E') {
int e;
@ -1681,14 +1765,16 @@ tok_get(struct tok_state *tok, char **p_start, char **p_end)
*p_end = tok->cur;
return NUMBER;
}
do {
c = tok_nextc(tok);
} while (isdigit(c));
c = tok_decimal_tail(tok);
if (c == 0) {
return ERRORTOKEN;
}
}
if (c == 'j' || c == 'J')
if (c == 'j' || c == 'J') {
/* Imaginary part */
imaginary:
c = tok_nextc(tok);
}
}
}
tok_backup(tok, c);
@ -1708,22 +1794,27 @@ tok_get(struct tok_state *tok, char **p_start, char **p_end)
c = tok_nextc(tok);
if (c == quote) {
c = tok_nextc(tok);
if (c == quote)
if (c == quote) {
quote_size = 3;
else
}
else {
end_quote_size = 1; /* empty string found */
}
}
if (c != quote)
if (c != quote) {
tok_backup(tok, c);
}
/* Get rest of string */
while (end_quote_size != quote_size) {
c = tok_nextc(tok);
if (c == EOF) {
if (quote_size == 3)
if (quote_size == 3) {
tok->done = E_EOFS;
else
}
else {
tok->done = E_EOLS;
}
tok->cur = tok->inp;
return ERRORTOKEN;
}
@ -1732,12 +1823,14 @@ tok_get(struct tok_state *tok, char **p_start, char **p_end)
tok->cur = tok->inp;
return ERRORTOKEN;
}
if (c == quote)
if (c == quote) {
end_quote_size += 1;
}
else {
end_quote_size = 0;
if (c == '\\')
if (c == '\\') {
tok_nextc(tok); /* skip escaped char */
}
}
}
@ -1767,7 +1860,8 @@ tok_get(struct tok_state *tok, char **p_start, char **p_end)
int token3 = PyToken_ThreeChars(c, c2, c3);
if (token3 != OP) {
token = token3;
} else {
}
else {
tok_backup(tok, c3);
}
*p_start = tok->start;

27
Python/ast.c
View file

@ -4018,7 +4018,7 @@ ast_for_stmt(struct compiling *c, const node *n)
}
static PyObject *
parsenumber(struct compiling *c, const char *s)
parsenumber_raw(struct compiling *c, const char *s)
{
const char *end;
long x;
@ -4060,6 +4060,31 @@ parsenumber(struct compiling *c, const char *s)
}
}
static PyObject *
parsenumber(struct compiling *c, const char *s)
{
char *dup, *end;
PyObject *res = NULL;
assert(s != NULL);
if (strchr(s, '_') == NULL) {
return parsenumber_raw(c, s);
}
/* Create a duplicate without underscores. */
dup = PyMem_Malloc(strlen(s) + 1);
end = dup;
for (; *s; s++) {
if (*s != '_') {
*end++ = *s;
}
}
*end = '\0';
res = parsenumber_raw(c, dup);
PyMem_Free(dup);
return res;
}
static PyObject *
decode_utf8(struct compiling *c, const char **sPtr, const char *end)
{

66
Python/pystrtod.c
View file

@ -370,6 +370,72 @@ PyOS_string_to_double(const char *s,
return result;
}
/* Remove underscores that follow the underscore placement rule from
the string and then call the `innerfunc` function on the result.
It should return a new object or NULL on exception.
`what` is used for the error message emitted when underscores are detected
that don't follow the rule. `arg` is an opaque pointer passed to the inner
function.
This is used to implement underscore-agnostic conversion for floats
and complex numbers.
*/
PyObject *
_Py_string_to_number_with_underscores(
const char *s, Py_ssize_t orig_len, const char *what, PyObject *obj, void *arg,
PyObject *(*innerfunc)(const char *, Py_ssize_t, void *))
{
char prev;
const char *p, *last;
char *dup, *end;
PyObject *result;
if (strchr(s, '_') == NULL) {
return innerfunc(s, orig_len, arg);
}
dup = PyMem_Malloc(orig_len + 1);
end = dup;
prev = '\0';
last = s + orig_len;
for (p = s; *p; p++) {
if (*p == '_') {
/* Underscores are only allowed after digits. */
if (!(prev >= '0' && prev <= '9')) {
goto error;
}
}
else {
*end++ = *p;
/* Underscores are only allowed before digits. */
if (prev == '_' && !(*p >= '0' && *p <= '9')) {
goto error;
}
}
prev = *p;
}
/* Underscores are not allowed at the end. */
if (prev == '_') {
goto error;
}
/* No embedded NULs allowed. */
if (p != last) {
goto error;
}
*end = '\0';
result = innerfunc(dup, end - dup, arg);
PyMem_Free(dup);
return result;
error:
PyMem_Free(dup);
PyErr_Format(PyExc_ValueError,
"could not convert string to %s: "
"%R", what, obj);
return NULL;
}
#ifdef PY_NO_SHORT_FLOAT_REPR
/* Given a string that may have a decimal point in the current