unikernel/duniverse/ocaml-caqti/caqti/lib-platform/system_utils.ml

@@ -0,0 +1,31 @@
+(* Copyright (C) 2025  Petter A. Urkedal <paurkedal@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version, with the LGPL-3.0 Linking Exception.
+ *
+ * This library is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+ * License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * and the LGPL-3.0 Linking Exception along with this library.  If not, see
+ * <http://www.gnu.org/licenses/> and <https://spdx.org>, respectively.
+ *)
+
+module Monad_syntax (Monad : System_sig.FIBER) = struct
+  open Monad.Infix
+
+  let ( let* ) = (>>=)
+  let ( let+ ) = (>|=)
+
+  let ( >>=? ) m f =
+    m >>= function Ok x -> f x | Error _ as r -> Monad.return r
+  let ( >|=? ) m f =
+    m >|= function Ok x -> Ok (f x) | Error _ as r -> r
+
+  let ( let*? ) = ( >>=? )
+  let ( let+? ) = ( >|=? )
+end