add a asdl bytes type, so Bytes.s be properly typechecked

3 files changed, 13 insertions, 3 deletions

diff --git a/Parser/Python.asdl b/Parser/Python.asdl
index dc322dc9f3..6955199280 100644
--- a/Parser/Python.asdl
+++ b/Parser/Python.asdl
@@ -1,4 +1,4 @@
--- ASDL's four builtin types are identifier, int, string, object
+-- ASDL's five builtin types are identifier, int, string, bytes, object
 
 module Python
 {
@@ -67,7 +67,7 @@ module Python
 			 expr? starargs, expr? kwargs)
 	     | Num(object n) -- a number as a PyObject.
 	     | Str(string s) -- need to specify raw, unicode, etc?
-	     | Bytes(string s)
+	     | Bytes(bytes s)
 	     | Ellipsis
 	     -- other literals? bools?
 
diff --git a/Parser/asdl.py b/Parser/asdl.py
index c63dfa7fb6..c90d2e26c3 100644
--- a/Parser/asdl.py
+++ b/Parser/asdl.py
@@ -228,7 +228,7 @@ class ASDLParser(spark.GenericParser, object):
         " field ::= Id ? "
         return Field(type[0], opt=True)
 
-builtin_types = ("identifier", "string", "int", "bool", "object")
+builtin_types = ("identifier", "string", "bytes", "int", "bool", "object")
 
 # below is a collection of classes to capture the AST of an AST :-)
 # not sure if any of the methods are useful yet, but I'm adding them
diff --git a/Parser/asdl_c.py b/Parser/asdl_c.py
index 432d7b7c25..0b95aaa1e8 100755
--- a/Parser/asdl_c.py
+++ b/Parser/asdl_c.py
@@ -776,6 +776,7 @@ static PyObject* ast2obj_object(void *o)
 }
 #define ast2obj_identifier ast2obj_object
 #define ast2obj_string ast2obj_object
+#define ast2obj_bytes ast2obj_object
 
 static PyObject* ast2obj_int(long b)
 {
@@ -813,6 +814,15 @@ static int obj2ast_string(PyObject* obj, PyObject** out, PyArena* arena)
     return obj2ast_object(obj, out, arena);
 }
 
+static int obj2ast_bytes(PyObject* obj, PyObject** out, PyArena* arena)
+{
+    if (!PyBytes_CheckExact(obj)) {
+        PyErr_SetString(PyExc_TypeError, "AST bytes must be of type bytes");
+        return 1;
+    }
+    return obj2ast_object(obj, out, arena);
+}
+
 static int obj2ast_int(PyObject* obj, int* out, PyArena* arena)
 {
     int i;