From 818628c53a85680cd0e5ea8be3da5ddd34da0a54 Mon Sep 17 00:00:00 2001
From: Michael Weiss <dev.primeos@gmail.com>
Date: Tue, 11 Feb 2020 22:18:23 +0100
Subject: [PATCH] tl-expected: init at 2019-11-11

This version is 5 commits ahead of version 1.0.0 because we need at
least one patch [0] that prevents CMake from trying to use Git to fetch
the already fetched submodule...
Also some files have the wrong formatting (CRLF line endings) which
makes the patching really messy. At this point is seems therefore better
to use the master version instead (1.0.0 is pretty broken regarding
CMake).

[0]: https://github.com/TartanLlama/expected/commit/0ca73ee30e72a54b285ef1e26fd9ecc83c81e5ea
---
 .../libraries/tl-expected/default.nix         | 24 +++++++++++++++++++
 pkgs/top-level/all-packages.nix               |  2 ++
 2 files changed, 26 insertions(+)
 create mode 100644 pkgs/development/libraries/tl-expected/default.nix

diff --git a/pkgs/development/libraries/tl-expected/default.nix b/pkgs/development/libraries/tl-expected/default.nix
new file mode 100644
index 00000000000..9de97229e0b
--- /dev/null
+++ b/pkgs/development/libraries/tl-expected/default.nix
@@ -0,0 +1,24 @@
+{ stdenv, fetchFromGitHub, cmake }:
+
+stdenv.mkDerivation rec {
+  pname = "tl-expected-unstable";
+  version = "2019-11-11"; # 5 commits ahead of version 1.0.0
+
+  src = fetchFromGitHub {
+    owner = "TartanLlama";
+    repo = "expected";
+    rev = "1d9c5d8c0da84b8ddc54bd3d90d632eec95c1f13";
+    fetchSubmodules = true;
+    sha256 = "0rzfn9yyg70zwpxbmv22qy0015baymi2rdd65ixmcb31fgnap68i";
+  };
+
+  nativeBuildInputs = [ cmake ];
+
+  meta = with stdenv.lib; {
+    description = "C++11/14/17 std::expected with functional-style extensions";
+    homepage = https://tl.tartanllama.xyz/en/latest/api/expected.html;
+    license = licenses.cc0;
+    platforms = platforms.all;
+    maintainers = with maintainers; [ primeos ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index cb4016b4971..e645277627c 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -14458,6 +14458,8 @@ in
   tk-8_6 = callPackage ../development/libraries/tk/8.6.nix { };
   tk-8_5 = callPackage ../development/libraries/tk/8.5.nix { tcl = tcl-8_5; };
 
+  tl-expected = callPackage ../development/libraries/tl-expected { };
+
   tnt = callPackage ../development/libraries/tnt { };
 
   tntnet = callPackage ../development/libraries/tntnet { };