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Issue #999042: The Python compiler now handles explict global statements

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correctly (should be assigned using STORE_GLOBAL opcode).  This was done by
having the system table differentiate between explict and implicit globals.
This commit is contained in:
Neil Schemenauer 2009-02-07 00:54:41 +00:00
parent 98c3b85bc4
commit 92c3b2190b
4 changed files with 18 additions and 10 deletions
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9
Lib/compiler/symbols.py
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@ -1,7 +1,8 @@
"""Module symbol-table generator"""
from compiler import ast
from compiler.consts import SC_LOCAL, SC_GLOBAL, SC_FREE, SC_CELL, SC_UNKNOWN
from compiler.consts import SC_LOCAL, SC_GLOBAL_IMPLICIT, SC_GLOBAL_EXPLICT, \
SC_FREE, SC_CELL, SC_UNKNOWN
from compiler.misc import mangle
import types
@ -89,7 +90,7 @@ def check_name(self, name):
The scope of a name could be LOCAL, GLOBAL, FREE, or CELL.
"""
if name in self.globals:
return SC_GLOBAL
return SC_GLOBAL_EXPLICT
if name in self.cells:
return SC_CELL
if name in self.defs:
@ -99,7 +100,7 @@ def check_name(self, name):
if self.nested:
return SC_UNKNOWN
else:
return SC_GLOBAL
return SC_GLOBAL_IMPLICIT
def get_free_vars(self):
if not self.nested:
@ -152,7 +153,7 @@ def add_frees(self, names):
if sc == SC_UNKNOWN or sc == SC_FREE \
or isinstance(self, ClassScope):
self.frees[name] = 1
elif sc == SC_GLOBAL:
elif sc == SC_GLOBAL_IMPLICIT:
child_globals.append(name)
elif isinstance(self, FunctionScope) and sc == SC_LOCAL:
self.cells[name] = 1