# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1384526807 -3600
# Node ID 87db7d860e4e070af69a5b87a00b378949c4b85b
# Parent  11e442323fc68e3af3bd437f0ddd7327e88f316a
Added a module to verify that an appropriate compiler module is being used.

diff -r 11e442323fc6 -r 87db7d860e4e micropython/common.py
--- a/micropython/common.py	Fri Nov 15 13:15:30 2013 +0100
+++ b/micropython/common.py	Fri Nov 15 15:46:47 2013 +0100
@@ -19,8 +19,8 @@
 this program.  If not, see <http://www.gnu.org/licenses/>.
 """
 
+from micropython.stdcompiler import compiler
 from compiler.ast import AssAttr, Getattr, Name
-import compiler.ast
 from micropython.basicdata import Const, Constant, TypedInstance
 from micropython.data import BaseAttr, Class, Module
 from micropython.errors import *
diff -r 11e442323fc6 -r 87db7d860e4e micropython/deduce.py
--- a/micropython/deduce.py	Fri Nov 15 13:15:30 2013 +0100
+++ b/micropython/deduce.py	Fri Nov 15 15:46:47 2013 +0100
@@ -22,7 +22,6 @@
 from micropython.common import *
 from micropython.data import *
 from micropython.errors import *
-import compiler.ast
 
 # Source code classes.
 
diff -r 11e442323fc6 -r 87db7d860e4e micropython/inspect.py
--- a/micropython/inspect.py	Fri Nov 15 13:15:30 2013 +0100
+++ b/micropython/inspect.py	Fri Nov 15 15:46:47 2013 +0100
@@ -75,7 +75,7 @@
 from micropython.common import ASTVisitor, operator_functions, get_module_name
 from micropython.data import *
 from micropython.errors import *
-import compiler.ast
+from micropython.stdcompiler import compiler
 import sys
 
 class NullBranch(compiler.ast.AttributeUser):
diff -r 11e442323fc6 -r 87db7d860e4e micropython/report.py
--- a/micropython/report.py	Fri Nov 15 13:15:30 2013 +0100
+++ b/micropython/report.py	Fri Nov 15 15:46:47 2013 +0100
@@ -23,7 +23,7 @@
 from micropython.data import *
 from micropython.errors import *
 from os.path import exists, extsep, join
-import compiler.ast
+from micropython.stdcompiler import compiler
 import sys
 import os
 import textwrap
diff -r 11e442323fc6 -r 87db7d860e4e micropython/stdcompiler.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/micropython/stdcompiler.py	Fri Nov 15 15:46:47 2013 +0100
@@ -0,0 +1,29 @@
+#!/usr/bin/env python
+
+"""
+Compiler module import control.
+
+Copyright (C) 2013 Paul Boddie <paul@boddie.org.uk>
+
+This program is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free Software
+Foundation; either version 3 of the License, or (at your option) any later
+version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+details.
+
+You should have received a copy of the GNU General Public License along with
+this program.  If not, see <http://www.gnu.org/licenses/>.
+"""
+
+import compiler.ast
+
+if not hasattr(compiler.ast, "AttributeUser"):
+    raise SystemError, "The compiler module must support micropython " \
+                       "annotations. See the documentation for more " \
+                       "information."
+
+# vim: tabstop=4 expandtab shiftwidth=4
diff -r 11e442323fc6 -r 87db7d860e4e micropython/syspython.py
--- a/micropython/syspython.py	Fri Nov 15 13:15:30 2013 +0100
+++ b/micropython/syspython.py	Fri Nov 15 15:46:47 2013 +0100
@@ -23,7 +23,7 @@
 from micropython.data import *
 from micropython.errors import *
 from os.path import exists, extsep, join
-import compiler.ast
+from micropython.stdcompiler import compiler
 import sys
 import os