From 5ce1b33502b6c90868874dbc649ee3e336b1928e Mon Sep 17 00:00:00 2001
From: Steve Klabnik <steve@steveklabnik.com>
Date: Fri, 13 Feb 2015 08:55:11 -0500
Subject: [PATCH] Reintroduce box syntax where needed
Otherwise, this line is a lie.
---
src/doc/trpl/pointers.md | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/src/doc/trpl/pointers.md b/src/doc/trpl/pointers.md
index 9c649cd2273..332f299a67f 100644
--- a/src/doc/trpl/pointers.md
+++ b/src/doc/trpl/pointers.md
@@ -687,7 +687,9 @@ than the hundred `int`s that make up the `BigStruct`.
This is an antipattern in Rust. Instead, write this:
-```{rust}
+```rust
+#![feature(box_syntax)]
+
struct BigStruct {
one: i32,
two: i32,
@@ -706,10 +708,13 @@ fn main() {
one_hundred: 100,
});
- let y = Box::new(foo(x));
+ let y = box foo(x);
}
```
+Note that this uses the `box_syntax` feature gate, so this syntax may change in
+the future.
+
This gives you flexibility without sacrificing performance.
You may think that this gives us terrible performance: return a value and then