From 0c4e15a52eb071a454eb34f2d1eacd894b252ec9 Mon Sep 17 00:00:00 2001
From: bjorn3 <bjorn3@users.noreply.github.com>
Date: Wed, 26 Aug 2020 12:36:30 +0200
Subject: [PATCH] [reader] Replace == None with .is_none() in Parser::token

This replaces a full function call with matching on both lhs and rhs
with a single cmpb instruction.
---
 cranelift/reader/src/parser.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cranelift/reader/src/parser.rs b/cranelift/reader/src/parser.rs
index 44a2ea30e3..230d1b83d3 100644
--- a/cranelift/reader/src/parser.rs
+++ b/cranelift/reader/src/parser.rs
@@ -445,7 +445,7 @@ impl<'a> Parser<'a> {
         // running. I don't think this is true - self.lookahead is mutated in the loop body - so
         // maybe this is a clippy bug? Either way, disable clippy for this.
         #[cfg_attr(feature = "cargo-clippy", allow(clippy::while_immutable_condition))]
-        while self.lookahead == None {
+        while self.lookahead.is_none() {
             match self.lex.next() {
                 Some(Ok(LocatedToken { token, location })) => {
                     match token {