From e8638c16305068b50b6b084519bbd3ded412689d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= <sebastian@centricular.com>
Date: Sun, 5 Nov 2017 19:16:50 +0200
Subject: [PATCH] Mark various enums that can signal errors as #[must_use]

See https://github.com/sdroege/gstreamer-rs/issues/44
---
 Gir_Gst.toml                | 24 ++++++++++++++++++++----
 gstreamer/src/auto/enums.rs |  4 ++++
 2 files changed, 24 insertions(+), 4 deletions(-)

diff --git a/Gir_Gst.toml b/Gir_Gst.toml
index a3ef354ba..c2f7bc7be 100644
--- a/Gir_Gst.toml
+++ b/Gir_Gst.toml
@@ -18,11 +18,9 @@ generate = [
     "Gst.ClockTimeDiff",
     "Gst.Pipeline",
     "Gst.State",
-    "Gst.StateChangeReturn",
     "Gst.StateChange",
     "Gst.SeekFlags",
     "Gst.SeekType",
-    "Gst.FlowReturn",
     "Gst.PadDirection",
     "Gst.PadPresence",
     "Gst.URIHandler",
@@ -44,7 +42,6 @@ generate = [
     "Gst.DeviceMonitor",
     "Gst.StreamType",
     "Gst.StreamFlags",
-    "Gst.PadLinkReturn",
     "Gst.ProgressType",
     "Gst.BusSyncReply",
     "Gst.TagMergeMode",
@@ -65,7 +62,6 @@ generate = [
     "Gst.TocLoopType",
     "Gst.TocSetter",
     "Gst.ClockType",
-    "Gst.ClockReturn",
     "Gst.ElementFlags",
     "Gst.Rank",
     "Gst.PadLinkCheck",
@@ -705,3 +701,23 @@ status = "generate"
     pattern = "parse.*full"
     # wrong mutable for context parameter
     ignore = true
+
+[[object]]
+name = "Gst.StateChangeReturn"
+status = "generate"
+must_use = true
+
+[[object]]
+name = "Gst.FlowReturn"
+status = "generate"
+must_use = true
+
+[[object]]
+name = "Gst.PadLinkReturn"
+status = "generate"
+must_use = true
+
+[[object]]
+name = "Gst.ClockReturn"
+status = "generate"
+must_use = true
diff --git a/gstreamer/src/auto/enums.rs b/gstreamer/src/auto/enums.rs
index f3b3940d0..33cf37d27 100644
--- a/gstreamer/src/auto/enums.rs
+++ b/gstreamer/src/auto/enums.rs
@@ -191,6 +191,7 @@ impl SetValue for CapsIntersectMode {
 }
 
 #[derive(Clone, Copy, Debug, Eq, PartialEq, Hash)]
+#[must_use]
 pub enum ClockReturn {
     Ok,
     Early,
@@ -677,6 +678,7 @@ impl SetValue for EventType {
 }
 
 #[derive(Clone, Copy, Debug, Eq, PartialEq, Hash)]
+#[must_use]
 pub enum FlowReturn {
     CustomSuccess2,
     CustomSuccess1,
@@ -993,6 +995,7 @@ impl SetValue for PadDirection {
 }
 
 #[derive(Clone, Copy, Debug, Eq, PartialEq, Hash)]
+#[must_use]
 pub enum PadLinkReturn {
     Ok,
     WrongHierarchy,
@@ -1950,6 +1953,7 @@ impl SetValue for StateChange {
 }
 
 #[derive(Clone, Copy, Debug, Eq, PartialEq, Hash)]
+#[must_use]
 pub enum StateChangeReturn {
     Failure,
     Success,