From 3c139ae929118d984e30d4b093c36618fcddf2f9 Mon Sep 17 00:00:00 2001
From: pierwill <19642016+pierwill@users.noreply.github.com>
Date: Thu, 2 Jul 2020 15:11:03 -0700
Subject: [PATCH] Document rustc_ast::ast::Pat

---
 src/librustc_ast/ast.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/librustc_ast/ast.rs b/src/librustc_ast/ast.rs
index 99fbb1ee3ea83..6543117774a68 100644
--- a/src/librustc_ast/ast.rs
+++ b/src/librustc_ast/ast.rs
@@ -511,6 +511,9 @@ pub struct Block {
     pub span: Span,
 }
 
+/// A match pattern.
+///
+/// Patterns appear in match statements and some other contexts, such as `let` and `if let`.
 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
 pub struct Pat {
     pub id: NodeId,