From 8f6a0cdb0fd453580bed74586c6930b1498aa26f Mon Sep 17 00:00:00 2001
From: Mazdak Farrokhzad <twingoow@gmail.com>
Date: Sun, 18 Aug 2019 18:38:36 +0200
Subject: [PATCH] parser: document `ban_unexpected_or_or`.

---
 src/libsyntax/parse/parser/pat.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/libsyntax/parse/parser/pat.rs b/src/libsyntax/parse/parser/pat.rs
index 680a58720568..8fab8884ca01 100644
--- a/src/libsyntax/parse/parser/pat.rs
+++ b/src/libsyntax/parse/parser/pat.rs
@@ -90,6 +90,7 @@ impl<'a> Parser<'a> {
         }
     }
 
+    /// We have parsed `||` instead of `|`. Error and suggest `|` instead.
     fn ban_unexpected_or_or(&mut self) {
         self.struct_span_err(self.token.span, "unexpected token `||` after pattern")
             .span_suggestion(