From cb0cd719009826e0f0699208704078401cdc9e88 Mon Sep 17 00:00:00 2001
From: Joshua Nelson <jyn514@gmail.com>
Date: Sat, 6 Jun 2020 17:29:51 -0400
Subject: [PATCH] impl From<LocalDefId> for DefId

This makes it easier for new contributors (a.k.a me) to convert between
types without having to look up
https://doc.rust-lang.org/nightly/nightly-rustc/rustc_hir/def_id/struct.LocalDefId.html#method.to_def_id.
I think in some cases it will also cause rustc to suggest `.into()` when
the types don't match which maybe helpful even to experienced
contributors.
---
 src/librustc_span/def_id.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/librustc_span/def_id.rs b/src/librustc_span/def_id.rs
index fad9f2f613012..c4bd428b132c6 100644
--- a/src/librustc_span/def_id.rs
+++ b/src/librustc_span/def_id.rs
@@ -231,6 +231,12 @@ impl LocalDefId {
     }
 }
 
+impl From<LocalDefId> for DefId {
+    fn from(local: LocalDefId) -> Self {
+        local.to_def_id()
+    }
+}
+
 impl fmt::Debug for LocalDefId {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         self.to_def_id().fmt(f)