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bpo-37500: Make sure dead code does not generate bytecode but also detect syntax errors (GH-14612)

Browse source 
https://bugs.python.org/issue37500

Add a new field to the compiler structure that allows to be configured
so no bytecode is emitted. In this way is possible to detect errors by
walking the nodes while preserving optimizations.


https://bugs.python.org/issue37500
This commit is contained in:
Pablo Galindo 2019-07-15 10:15:01 +01:00 • committed by Miss Islington (bot)
parent cd6e83b481
commit 18c5f9d44d
4 changed files with 174 additions and 18 deletions
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41
Lib/test/test_syntax.py
View file

@ -697,18 +697,47 @@ class SyntaxTestCase(unittest.TestCase):
self._check_error("break", "outside loop")
def test_yield_outside_function(self):
self._check_error("if 0: yield", "outside function")
self._check_error("class C:\n if 0: yield", "outside function")
self._check_error("if 0: yield", "outside function")
self._check_error("if 0: yield\nelse: x=1", "outside function")
self._check_error("if 1: pass\nelse: yield", "outside function")
self._check_error("while 0: yield", "outside function")
self._check_error("while 0: yield\nelse: x=1", "outside function")
self._check_error("class C:\n if 0: yield", "outside function")
self._check_error("class C:\n if 1: pass\n else: yield",
"outside function")
self._check_error("class C:\n while 0: yield", "outside function")
self._check_error("class C:\n while 0: yield\n else: x = 1",
"outside function")
def test_return_outside_function(self):
self._check_error("if 0: return", "outside function")
self._check_error("class C:\n if 0: return", "outside function")
self._check_error("if 0: return", "outside function")
self._check_error("if 0: return\nelse: x=1", "outside function")
self._check_error("if 1: pass\nelse: return", "outside function")
self._check_error("while 0: return", "outside function")
self._check_error("class C:\n if 0: return", "outside function")
self._check_error("class C:\n while 0: return", "outside function")
self._check_error("class C:\n while 0: return\n else: x=1",
"outside function")
self._check_error("class C:\n if 0: return\n else: x= 1",
"outside function")
self._check_error("class C:\n if 1: pass\n else: return",
"outside function")
def test_break_outside_loop(self):
self._check_error("if 0: break", "outside loop")
self._check_error("if 0: break", "outside loop")
self._check_error("if 0: break\nelse: x=1", "outside loop")
self._check_error("if 1: pass\nelse: break", "outside loop")
self._check_error("class C:\n if 0: break", "outside loop")
self._check_error("class C:\n if 1: pass\n else: break",
"outside loop")
def test_continue_outside_loop(self):
self._check_error("if 0: continue", "not properly in loop")
self._check_error("if 0: continue", "not properly in loop")
self._check_error("if 0: continue\nelse: x=1", "not properly in loop")
self._check_error("if 1: pass\nelse: continue", "not properly in loop")
self._check_error("class C:\n if 0: continue", "not properly in loop")
self._check_error("class C:\n if 1: pass\n else: continue",
"not properly in loop")
def test_unexpected_indent(self):
self._check_error("foo()\n bar()\n", "unexpected indent",