From 98f98cbb5404385703a404547aa2477d4a2fd1cb Mon Sep 17 00:00:00 2001
From: Edwin Cheng <edwin0cheng@gmail.com>
Date: Fri, 13 Dec 2019 21:53:34 +0800
Subject: Refactor tt::Delimiter

---
 crates/ra_tt/src/lib.rs | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

(limited to 'crates/ra_tt')

diff --git a/crates/ra_tt/src/lib.rs b/crates/ra_tt/src/lib.rs
index 4c00b8f30..e7bfd5fd2 100644
--- a/crates/ra_tt/src/lib.rs
+++ b/crates/ra_tt/src/lib.rs
@@ -48,9 +48,9 @@ pub enum Leaf {
 }
 impl_froms!(Leaf: Literal, Punct, Ident);
 
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+#[derive(Debug, Clone, PartialEq, Eq, Hash, Default)]
 pub struct Subtree {
-    pub delimiter: Delimiter,
+    pub delimiter: Option<Delimiter>,
     pub token_trees: Vec<TokenTree>,
 }
 
@@ -59,7 +59,6 @@ pub enum Delimiter {
     Parenthesis,
     Brace,
     Bracket,
-    None,
 }
 
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
@@ -97,10 +96,10 @@ impl fmt::Display for TokenTree {
 impl fmt::Display for Subtree {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         let (l, r) = match self.delimiter {
-            Delimiter::Parenthesis => ("(", ")"),
-            Delimiter::Brace => ("{", "}"),
-            Delimiter::Bracket => ("[", "]"),
-            Delimiter::None => ("", ""),
+            Some(Delimiter::Parenthesis) => ("(", ")"),
+            Some(Delimiter::Brace) => ("{", "}"),
+            Some(Delimiter::Bracket) => ("[", "]"),
+            None => ("", ""),
         };
         f.write_str(l)?;
         let mut needs_space = false;
-- 
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