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compiler: don't emit SyntaxWarning on const stmt

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Issue #26204: the compiler doesn't emit SyntaxWarning warnings anymore when
constant statements are ignored.
This commit is contained in:
Victor Stinner 2016-02-08 22:45:06 +01:00
parent 896632ea6b
commit 15a3095d64
5 changed files with 28 additions and 76 deletions
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58
Lib/test/test_code.py
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@ -66,6 +66,24 @@ nlocals: 1
flags: 67
consts: ('None',)
>>> def optimize_away():
... 'doc string'
... 'not a docstring'
... 53
... 0x53
>>> dump(optimize_away.__code__)
name: optimize_away
argcount: 0
kwonlyargcount: 0
names: ()
varnames: ()
cellvars: ()
freevars: ()
nlocals: 0
flags: 67
consts: ("'doc string'", 'None')
>>> def keywordonly_args(a,b,*,k1):
... return a,b,k1
...
@ -84,10 +102,8 @@ consts: ('None',)
"""
import textwrap
import unittest
import weakref
import warnings
from test.support import run_doctest, run_unittest, cpython_only
@ -118,44 +134,6 @@ class CodeTest(unittest.TestCase):
self.assertEqual(co.co_name, "funcname")
self.assertEqual(co.co_firstlineno, 15)
def dump(self, co):
dump = {}
for attr in ["name", "argcount", "kwonlyargcount", "names", "varnames",
"cellvars", "freevars", "nlocals", "flags"]:
dump[attr] = getattr(co, "co_" + attr)
dump['consts'] = tuple(consts(co.co_consts))
return dump
def test_optimize_away(self):
ns = {}
with warnings.catch_warnings():
warnings.filterwarnings('ignore', category=SyntaxWarning)
exec(textwrap.dedent('''
def optimize_away():
'doc string'
'not a docstring'
53
0x53
b'bytes'
1.0
True
False
None
...
'''), ns)
self.assertEqual(self.dump(ns['optimize_away'].__code__),
{'name': 'optimize_away',
'argcount': 0,
'kwonlyargcount': 0,
'names': (),
'varnames': (),
'cellvars': (),
'freevars': (),
'nlocals': 0,
'flags': 67,
'consts': ("'doc string'", 'None')})
class CodeWeakRefTest(unittest.TestCase):