From 93333f0d7b62df382913885ccf7e7c79702d090a Mon Sep 17 00:00:00 2001
From: Oliver Schneider <git-spam-no-reply9815368754983@oli-obk.de>
Date: Thu, 22 Dec 2016 15:51:59 +0100
Subject: [PATCH] support impl trait for needless lifetimes

---
 clippy_lints/src/lifetimes.rs                 |  7 ++++++
 .../run-pass/needless_lifetimes_impl_trait.rs | 22 +++++++++++++++++++
 2 files changed, 29 insertions(+)
 create mode 100644 tests/run-pass/needless_lifetimes_impl_trait.rs

diff --git a/clippy_lints/src/lifetimes.rs b/clippy_lints/src/lifetimes.rs
index ba705a84089..3600abe0d7b 100644
--- a/clippy_lints/src/lifetimes.rs
+++ b/clippy_lints/src/lifetimes.rs
@@ -281,6 +281,13 @@ impl<'a, 'tcx> Visitor<'tcx> for RefVisitor<'a, 'tcx> {
             TyPath(ref path) => {
                 self.collect_anonymous_lifetimes(path, ty);
             },
+            TyImplTrait(ref param_bounds) => {
+                for bound in param_bounds {
+                    if let RegionTyParamBound(_) = *bound {
+                        self.record(&None);
+                    }
+                }
+            }
             _ => (),
         }
         walk_ty(self, ty);
diff --git a/tests/run-pass/needless_lifetimes_impl_trait.rs b/tests/run-pass/needless_lifetimes_impl_trait.rs
new file mode 100644
index 00000000000..fab2fe626c3
--- /dev/null
+++ b/tests/run-pass/needless_lifetimes_impl_trait.rs
@@ -0,0 +1,22 @@
+#![feature(plugin)]
+#![plugin(clippy)]
+#![feature(conservative_impl_trait)]
+#![deny(needless_lifetime)]
+
+trait Foo {}
+
+struct Bar {}
+
+struct Baz<'a> {
+    bar: &'a Bar,
+}
+
+impl<'a> Foo for Baz<'a> {}
+
+impl Bar {
+    fn baz<'a>(&'a self) -> impl Foo + 'a {
+        Baz { bar: self }
+    }
+}
+
+fn main() {}