commit ab91445c1dcc617219f130e60da480ea4f015ba2
author David Tolnay <dtolnay@gmail.com> Mon May 04 00:21:37 2020 -0700
committer David Tolnay <dtolnay@gmail.com> Mon May 04 00:31:28 2020 -0700
tree b32ac17f3c6d00ba0e8ddb8fe2a7b24673f72261
parent 96a826b8f09f4064642aaca2d125a9d2e4554267

Check type name duplication more compactly

syntax/set.rs

diff --git a/syntax/set.rs b/syntax/set.rs
index ca816cf..688d1c0 100644
--- a/syntax/set.rs
+++ b/syntax/set.rs
@@ -18,10 +18,12 @@
         }
     }
 
-    pub fn insert(&mut self, value: &'a T) {
-        if self.set.insert(value) {
+    pub fn insert(&mut self, value: &'a T) -> bool {
+        let new = self.set.insert(value);
+        if new {
             self.vec.push(value);
         }
+        new
     }
 
     pub fn contains(&self, value: &T) -> bool {