Definitive nogil and cypclass flag in parsing

Cython/Compiler/Parsing.py

@@ -3787,14 +3787,14 @@ def p_cpp_class_definition(s, pos,  ctx):
         base_classes = []
     if s.sy == '[':
         error(s.position(), "Name options not allowed for C++ class")
-    nogil = p_nogil(s)
+    nogil = p_nogil(s) or cypclass
     if s.sy == ':':
         s.next()
         s.expect('NEWLINE')
         s.expect_indent()
         doc = p_doc_string(s)
         attributes = []
-        body_ctx = Ctx(visibility = ctx.visibility, level='cpp_class', nogil=nogil)
+        body_ctx = Ctx(visibility = ctx.visibility, level='cpp_class', nogil=nogil or ctx.nogil)
         body_ctx.templates = template_names
         while s.sy != 'DEDENT':
             if s.sy != 'pass':