From 4625ba4872e17a98ea11940fff0e50b3b880b815 Mon Sep 17 00:00:00 2001
From: Mazdak Farrokhzad <twingoow@gmail.com>
Date: Sun, 8 Dec 2019 11:57:18 +0100
Subject: [PATCH] simplify 'let question = ...;'

---
 src/librustc_parse/parser/ty.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/librustc_parse/parser/ty.rs b/src/librustc_parse/parser/ty.rs
index eadaf8ad716..c9722045875 100644
--- a/src/librustc_parse/parser/ty.rs
+++ b/src/librustc_parse/parser/ty.rs
@@ -426,7 +426,7 @@ fn parse_generic_bound(
         let has_parens = self.eat(&token::OpenDelim(token::Paren));
         let inner_lo = self.token.span;
         let is_negative = self.eat(&token::Not);
-        let question = if self.eat(&token::Question) { Some(self.prev_span) } else { None };
+        let question = self.eat(&token::Question).then_some(self.prev_span);
         if self.token.is_lifetime() {
             Ok(Ok(self.parse_generic_lt_bound(lo, inner_lo, has_parens, question)?))
         } else {