Implement magic method return values, fixes #1577

test/completion/functions.py

@@ -241,7 +241,7 @@ args_func(*1)[0]
 args_func(*iter([1]))[0]
 
 # different types
-e = args_func(*[1+"", {}])
+e = args_func(*[1 if UNDEFINED else "", {}])
 #? int() str()
 e[0]
 #? dict()

test/completion/positional_only_params.py

@@ -5,7 +5,10 @@ def positional_only_call(a, /, b):
     a
     #? int()
     b
-    return a + b
+    if UNDEFINED:
+        return a
+    else:
+        return b
 
 
 #? int() str()
@@ -13,7 +16,10 @@ positional_only_call('', 1)
 
 
 def positional_only_call2(a, /, b=3):
-    return a + b
+    if UNDEFINED:
+        return a
+    else:
+        return b
 
 #? int()
 positional_only_call2(1)

test/completion/precedence.py

@@ -56,7 +56,7 @@ a
 (3 ** 3)
 #? int() str()
 (3 ** 'a')
-#? int() str()
+#? int()
 (3 + 'a')
 #? bool()
 (3 == 'a')
@@ -147,3 +147,18 @@ a = foobarbaz + 'hello'
 
 #? int() float()
 {'hello': 1, 'bar': 1.0}[a]
+
+# -----------------
+# stubs
+# -----------------
+
+from datetime import datetime, timedelta
+
+#?
+(datetime - timedelta)
+#? datetime()
+(datetime() - timedelta())
+#? timedelta()
+(timedelta() - datetime())
+#? timedelta()
+(timedelta() - timedelta())