Fix async tests by adding back __await__ use. Remove u* lookup

locale/circuitpython.pot

@@ -414,6 +414,10 @@ msgstr ""
 msgid "'return' outside function"
 msgstr ""
 
+#: py/compile.c
+msgid "'yield from' inside async function"
+msgstr ""
+
 #: py/compile.c
 msgid "'yield' outside function"
 msgstr ""

py/compile.c

@@ -923,7 +923,7 @@ STATIC void compile_decorated(compiler_t *comp, mp_parse_node_struct_t *pns) {
         mp_parse_node_struct_t *pns0 = (mp_parse_node_struct_t *)pns_body->nodes[0];
         body_name = compile_funcdef_helper(comp, pns0, emit_options);
         scope_t *fscope = (scope_t *)pns0->nodes[4];
-        fscope->scope_flags |= MP_SCOPE_FLAG_GENERATOR;
+        fscope->scope_flags |= MP_SCOPE_FLAG_GENERATOR | MP_SCOPE_FLAG_ASYNC;
     #endif
     } else {
         assert(MP_PARSE_NODE_STRUCT_KIND(pns_body) == PN_classdef); // should be
@@ -1963,7 +1963,7 @@ STATIC void compile_async_stmt(compiler_t *comp, mp_parse_node_struct_t *pns) {
         // async def
         compile_funcdef(comp, pns0);
         scope_t *fscope = (scope_t *)pns0->nodes[4];
-        fscope->scope_flags |= MP_SCOPE_FLAG_GENERATOR;
+        fscope->scope_flags |= MP_SCOPE_FLAG_GENERATOR | MP_SCOPE_FLAG_ASYNC;
     } else {
         // async for/with; first verify the scope is a generator
         int scope_flags = comp->scope_cur->scope_flags;
@@ -2738,6 +2738,12 @@ STATIC void compile_yield_expr(compiler_t *comp, mp_parse_node_struct_t *pns) {
         reserve_labels_for_native(comp, 1);
     } else if (MP_PARSE_NODE_IS_STRUCT_KIND(pns->nodes[0], PN_yield_arg_from)) {
         pns = (mp_parse_node_struct_t *)pns->nodes[0];
+        #if MICROPY_PY_ASYNC_AWAIT
+        if (comp->scope_cur->scope_flags & MP_SCOPE_FLAG_ASYNC) {
+            compile_syntax_error(comp, (mp_parse_node_t)pns, translate("'yield from' inside async function"));
+            return;
+        }
+        #endif
         compile_node(comp, pns->nodes[0]);
         compile_yield_from(comp);
     } else {
@@ -2754,7 +2760,15 @@ STATIC void compile_atom_expr_await(compiler_t *comp, mp_parse_node_struct_t *pn
         return;
     }
     compile_atom_expr_normal(comp, pns);
-    compile_yield_from(comp);
+
+    // CIRCUITPY-CHANGE: Use __await__ instead of yield from.
+    // If it's an awaitable thing, need to reach for the __await__ method for the coroutine.
+    // async def functions' __await__ return themselves, which are able to receive a send(),
+    // while other types with custom __await__ implementations return async generators.
+    EMIT_ARG(load_method, MP_QSTR___await__, false);
+    EMIT_ARG(call_method, 0, 0, 0);
+    EMIT_ARG(load_const_tok, MP_TOKEN_KW_NONE);
+    EMIT_ARG(yield, MP_EMIT_YIELD_FROM);
 }
 #endif
 

py/objmodule.c

@@ -198,15 +198,8 @@ mp_obj_t mp_module_get_builtin(qstr module_name, bool extensible) {
         // should be using sys.path to force the built-in, but this retains
         // the old behaviour of the u-prefix being used to force a built-in
         // import.
-        size_t module_name_len;
-        const char *module_name_str = (const char *)qstr_data(module_name, &module_name_len);
-        if (module_name_str[0] != 'u') {
-            return MP_OBJ_NULL;
-        }
-        elem = mp_map_lookup((mp_map_t *)&mp_builtin_extensible_module_map, MP_OBJ_NEW_QSTR(qstr_from_strn(module_name_str + 1, module_name_len - 1)), MP_MAP_LOOKUP);
-        if (!elem) {
-            return MP_OBJ_NULL;
-        }
+        // CIRCUITPY-CHANGE: Don't look for `ufoo`.
+        return MP_OBJ_NULL;
     }
 
     #if MICROPY_MODULE_BUILTIN_INIT

tests/import/builtin_ext.py

@@ -23,18 +23,11 @@ print(usys, hasattr(usys, "__file__"))
 # This should get os.py, which uses uos to get the builtin.
 import os
 
-print(os, hasattr(os, "__file__"), os.sep, os.extra)
+print(os, hasattr(os, "__file__"))
 
 # This should get time.py, which uses empty sys.path to get the builtin.
 import time
 
 print(time, hasattr(time, "__file__"), time.sleep, time.extra)
 
-# These should get the builtins.
-import uos
-
-print(uos, hasattr(uos, "__file__"), hasattr(uos, "extra"))
-
-import utime
-
-print(utime, hasattr(utime, "__file__"), hasattr(utime, "extra"))
+# CIRCUITPY-CHANGE: Don't find u prefixes.

tests/import/builtin_ext.py.exp

@@ -3,8 +3,6 @@
 <module 'sys'> False
 <module 'sys'> False
 os from filesystem
-<module 'os' from 'ext/os.py'> True / 1
+<module 'os' from 'ext/os.py'> True
 time from filesystem
 <module 'time' from 'ext/time.py'> True <function> 1
-<module 'os'> False False
-<module 'time'> False False

tests/import/ext/os.py

@@ -1,5 +1,3 @@
 print("os from filesystem")
 
-from uos import *
-
 extra = 1