From 4b466ee4f94d7c17b0634495dc959e6f5dd4cc5a Mon Sep 17 00:00:00 2001
From: flip1995 <9744647+flip1995@users.noreply.github.com>
Date: Mon, 30 Jul 2018 11:20:11 +0200
Subject: [PATCH] Introduce the declare_tool_lint macro

---
 src/librustc/lint/mod.rs | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/src/librustc/lint/mod.rs b/src/librustc/lint/mod.rs
index 3c1b2056208..6940826ba86 100644
--- a/src/librustc/lint/mod.rs
+++ b/src/librustc/lint/mod.rs
@@ -139,6 +139,26 @@ macro_rules! declare_lint {
     );
 }
 
+#[macro_export]
+macro_rules! declare_tool_lint {
+    ($vis: vis $tool: ident ::$NAME: ident, $Level: ident, $desc: expr) => (
+        declare_tool_lint!{$vis $tool::$NAME, $Level, $desc, false}
+    );
+    ($vis: vis $tool: ident ::$NAME: ident, $Level: ident, $desc: expr,
+     report_in_external_macro: $rep: expr) => (
+         declare_tool_lint!{$vis $tool::$NAME, $Level, $desc, $rep}
+    );
+    ($vis: vis $tool: ident ::$NAME: ident, $Level: ident, $desc: expr, $external: expr) => (
+        $vis static $NAME: &$crate::lint::Lint = &$crate::lint::Lint {
+            name: &concat!(stringify!($tool), "::", stringify!($NAME)),
+            default_level: $crate::lint::$Level,
+            desc: $desc,
+            edition_lint_opts: None,
+            report_in_external_macro: $external,
+        };
+    );
+}
+
 /// Declare a static `LintArray` and return it as an expression.
 #[macro_export]
 macro_rules! lint_array {
-- 
2.44.0