From 976bc121d57cf11e278439f127f2bcd06e9ab3f6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Br=C3=A1ulio=20Bezerra?= <brauliobezerra@gmail.com>
Date: Sat, 14 Oct 2017 14:05:15 -0300
Subject: [PATCH] Extern crate grammar

---
 src/items/extern-crates.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/items/extern-crates.md b/src/items/extern-crates.md
index e12e37495..2bc20f9e1 100644
--- a/src/items/extern-crates.md
+++ b/src/items/extern-crates.md
@@ -1,5 +1,9 @@
 # Extern crate declarations
 
+> **<sup>Syntax:<sup>**  
+> _ExternCrate_ :  
+> &nbsp;&nbsp; `extern` `crate` [IDENTIFIER]&nbsp;(`as` [IDENTIFIER])<sup>?</sup> `;`
+
 An _`extern crate` declaration_ specifies a dependency on an external crate.
 The external crate is then bound into the declaring scope as the `ident`
 provided in the `extern_crate_decl`.
@@ -35,3 +39,5 @@ extern crate hello_world; // hyphen replaced with an underscore
 ```
 
 [RFC 940]: https://github.com/rust-lang/rfcs/blob/master/text/0940-hyphens-considered-harmful.md
+
+[IDENTIFIER]: identifiers.html