From d9592c2d9f0db851b090c10c0cc3560b87fc7789 Mon Sep 17 00:00:00 2001
From: Nicholas Nethercote <n.nethercote@gmail.com>
Date: Wed, 6 Apr 2022 12:08:39 +1000
Subject: Shrink `Nonterminal`.

By heap allocating the argument within `NtPath`, `NtVis`, and `NtStmt`.
This slightly reduces cumulative and peak allocation amounts, most
notably on `deep-vector`.
---
 compiler/rustc_parse/src/parser/expr.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'compiler/rustc_parse/src/parser/expr.rs')

diff --git a/compiler/rustc_parse/src/parser/expr.rs b/compiler/rustc_parse/src/parser/expr.rs
index 7978a1a7f5f..7efc0ca2da2 100644
--- a/compiler/rustc_parse/src/parser/expr.rs
+++ b/compiler/rustc_parse/src/parser/expr.rs
@@ -41,7 +41,7 @@ macro_rules! maybe_whole_expr {
                     return Ok(e);
                 }
                 token::NtPath(path) => {
-                    let path = path.clone();
+                    let path = (**path).clone();
                     $p.bump();
                     return Ok($p.mk_expr(
                         $p.prev_token.span,
-- 
cgit 1.4.1-3-g733a5