From 8852408bfb358766d59b83f294148fb5eeae26a0 Mon Sep 17 00:00:00 2001
From: Aleksey Kladov <aleksey.kladov@gmail.com>
Date: Thu, 10 Jan 2019 22:47:05 +0300
Subject: use arena for sysroot

---
 crates/ra_arena/src/lib.rs | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

(limited to 'crates/ra_arena/src/lib.rs')

diff --git a/crates/ra_arena/src/lib.rs b/crates/ra_arena/src/lib.rs
index 43bfa925a..d7d5d5265 100644
--- a/crates/ra_arena/src/lib.rs
+++ b/crates/ra_arena/src/lib.rs
@@ -35,12 +35,21 @@ impl fmt::Display for RawId {
     }
 }
 
-#[derive(Clone, Debug, PartialEq, Eq)]
+#[derive(Clone, PartialEq, Eq)]
 pub struct Arena<ID: ArenaId, T> {
     data: Vec<T>,
     _ty: PhantomData<ID>,
 }
 
+impl<ID: ArenaId, T: fmt::Debug> fmt::Debug for Arena<ID, T> {
+    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
+        fmt.debug_struct("Arena")
+            .field("len", &self.len())
+            .field("data", &self.data)
+            .finish()
+    }
+}
+
 #[macro_export]
 macro_rules! impl_arena_id {
     ($name:ident) => {
-- 
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