# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1373040234 -7200
# Node ID 02feed1a9aa3022c097a6e37b565678e7789953e
# Parent  ad6b88ecbf3cc79385a02f09cd7f84f2de22c86e
Added keyword argument names to the syspython module output.
Added a proper translation of slice objects.

diff -r ad6b88ecbf3c -r 02feed1a9aa3 docs/syspython.txt
--- a/docs/syspython.txt	Fri Jul 05 17:16:07 2013 +0200
+++ b/docs/syspython.txt	Fri Jul 05 18:03:54 2013 +0200
@@ -35,6 +35,11 @@
 
     constants(...)
 
+Each module may feature keyword arguments, and a list of such names is
+provided as follows:
+
+    keywords(...)
+
 Explicit structure declaration is still performed using class statements,
 but base classes are omitted and attributes are declared explicitly as
 follows:
@@ -183,11 +188,12 @@
 In general, attribute access must use an explicit function indicating the
 kind of access operation being performed. For example:
 
-                                                        # context effect
-                                                        # --------------
+                                                    # context effect
+
     loadattr(obj, attrname)                         # preserve context
     loadattrcontext(parent, attrname, obj)          # replace context with obj
     loadattrcontextcond(parent, attrname, obj)      # run-time context decision
+
     loadattrindex(obj, attrname)                    # preserve context
     loadattrindexcontextcond(obj, attrname)         # run-time context decision
 
@@ -195,6 +201,10 @@
     storeattrcontext(parent, attrname, value, obj)  # replace context with obj
     storeattrindex(obj, attrname, value)
 
+Recall that for loadattrindex family functions, the location of the attribute
+is obtained from the object table and the nature of the attribute is
+determined from the stored context value.
+
 Temporary variables could employ similar functions:
 
     loadtemp(0)
diff -r ad6b88ecbf3c -r 02feed1a9aa3 micropython/syspython.py
--- a/micropython/syspython.py	Fri Jul 05 17:16:07 2013 +0200
+++ b/micropython/syspython.py	Fri Jul 05 18:03:54 2013 +0200
@@ -91,6 +91,15 @@
 
         definitions = self.process_definitions(node)
 
+        # keywords(name, ...)
+
+        keywords = module.keyword_names and [
+            compiler.ast.CallFunc(
+                special_name("keywords"),
+                [special_name(name) for name in module.keyword_names]
+                )
+            ] or []
+
         # globalnames(name, ...)
 
         globalnames = module.module_attribute_names() and [
@@ -113,7 +122,7 @@
         self.in_main = False
         self.units.pop()
 
-        return compiler.ast.Module(node.doc, compiler.ast.Stmt(definitions + [main]))
+        return compiler.ast.Module(node.doc, compiler.ast.Stmt(keywords + definitions + [main]))
 
     # Statements.
 
@@ -1026,7 +1035,11 @@
             )
 
     def visitSliceobj(self, node):
-        return compiler.ast.Sliceobj([self.dispatch(n) for n in node.nodes])
+        return compiler.ast.CallFunc(
+            special_name("apply"),
+            [module_attribute("__builtins__", "slice")]
+                + [self.dispatch(n) for n in node.nodes]
+            )
 
     def visitSub(self, node):
         return self._visitBinary(node)