Fix `const_static_lifetime`

clippy_lints/src/const_static_lifetime.rs

@@ -1,4 +1,4 @@
-use syntax::ast::{Item, ItemKind, Ty, TyKind};
+use syntax::ast::*;
 use rustc::lint::{EarlyContext, EarlyLintPass, LintArray, LintPass};
 use utils::{in_macro, snippet, span_lint_and_then};
 
@@ -86,4 +86,22 @@ impl EarlyLintPass for StaticConst {
             }
         }
     }
+
+    fn check_trait_item(&mut self, cx: &EarlyContext, item: &TraitItem) {
+        if !in_macro(item.span) {
+            // Match only constants...
+            if let TraitItemKind::Const(ref var_type, _) = item.node {
+                self.visit_type(var_type, cx);
+            }
+        }
+    }
+
+    fn check_impl_item(&mut self, cx: &EarlyContext, item: &ImplItem) {
+        if !in_macro(item.span) {
+            // Match only constants...
+            if let ImplItemKind::Const(ref var_type, _) = item.node {
+                self.visit_type(var_type, cx);
+            }
+        }
+    }
 }

tests/ui/const_static_lifetime.rs

@@ -35,3 +35,15 @@ fn main() {
     println!("{:?}", VAR_HEIGHT);
     println!("{}", false_positive);
 }
+
+trait Bar {
+    const TRAIT_VAR: &'static str;
+}
+
+impl Foo {
+    const IMPL_VAR: &'static str = "var";
+}
+
+impl Bar for Foo {
+    const TRAIT_VAR: &'static str = "foo";
+}

tests/ui/const_static_lifetime.stderr

@@ -78,5 +78,23 @@ error: Constants have by default a `'static` lifetime
 24 | const VAR_ARRAY: &'static [u8; 1] = b"T"; // ERROR Consider removing 'static.
    |                  -^^^^^^^-------- help: consider removing `'static`: `&[u8; 1]`
 
-error: aborting due to 13 previous errors
+error: Constants have by default a `'static` lifetime
+  --> $DIR/const_static_lifetime.rs:40:23
+   |
+40 |     const TRAIT_VAR: &'static str;
+   |                      -^^^^^^^---- help: consider removing `'static`: `&str`
+
+error: Constants have by default a `'static` lifetime
+  --> $DIR/const_static_lifetime.rs:44:22
+   |
+44 |     const IMPL_VAR: &'static str = "var";
+   |                     -^^^^^^^---- help: consider removing `'static`: `&str`
+
+error: Constants have by default a `'static` lifetime
+  --> $DIR/const_static_lifetime.rs:48:23
+   |
+48 |     const TRAIT_VAR: &'static str = "foo";
+   |                      -^^^^^^^---- help: consider removing `'static`: `&str`
+
+error: aborting due to 16 previous errors