Merge pull request #266 from paultag/paultag/feature/yield-from

Paultag/feature/yield from

hy/core/macros.hy

@@ -0,0 +1,6 @@
+;;; hy core macros
+
+(defmacro yield-from [_hy_yield_from_els]
+  (quasiquote
+    (for [_hy_yield_from_x (unquote _hy_yield_from_els)]
+      (yield _hy_yield_from_x))))

hy/macros.py

@@ -31,10 +31,14 @@ from hy.util import str_type
 from collections import defaultdict
 
 
-MACROS = [
+CORE_MACROS = [
     "hy.core.bootstrap",
 ]
 
+EXTRA_MACROS = [
+    "hy.core.macros",
+]
+
 _hy_macros = defaultdict(dict)
 
 
@@ -74,7 +78,7 @@ _wrappers = {
 
 
 def process(tree, module_name):
-    load_macros()
+    load_macros(module_name)
     old = None
     while old != tree:
         old = tree
@@ -82,8 +86,14 @@ def process(tree, module_name):
     return tree
 
 
-def load_macros():
-    for module in MACROS:
+def load_macros(module_name):
+    for module in CORE_MACROS:
+        __import__(module)
+
+    if module_name.startswith("hy.core"):
+        return
+
+    for module in EXTRA_MACROS:
         __import__(module)
 
 

tests/native_tests/native_macros.hy

@@ -91,3 +91,11 @@
 (assert initialized)
 (assert (test-initialized))
 
+
+(defn test-yield-from []
+  "NATIVE: testing yield from"
+  (defn yield-from-test []
+    (for [i (range 3)]
+      (yield i))
+    (yield-from [1 2 3]))
+  (assert (= (list (yield-from-test)) [0 1 2 1 2 3])))