From dff1e379fc55429ea9a4794634e02c17cebee603 Mon Sep 17 00:00:00 2001
From: Mazdak Farrokhzad <twingoow@gmail.com>
Date: Wed, 15 May 2019 16:03:22 +0200
Subject: let_chains: Add support for parsing let expressions.

---
 src/libsyntax/util/parser.rs | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

(limited to 'src/libsyntax/util')

diff --git a/src/libsyntax/util/parser.rs b/src/libsyntax/util/parser.rs
index fcecee8c57f..81b5b085937 100644
--- a/src/libsyntax/util/parser.rs
+++ b/src/libsyntax/util/parser.rs
@@ -260,6 +260,7 @@ pub enum ExprPrecedence {
 
     Box,
     AddrOf,
+    Let,
     Unary,
 
     Call,
@@ -277,9 +278,7 @@ pub enum ExprPrecedence {
     Path,
     Paren,
     If,
-    IfLet,
     While,
-    WhileLet,
     ForLoop,
     Loop,
     Match,
@@ -318,6 +317,8 @@ impl ExprPrecedence {
             // Unary, prefix
             ExprPrecedence::Box |
             ExprPrecedence::AddrOf |
+            // Here `let pats = expr` has `let pats =` as a "unary" prefix of `expr`.
+            ExprPrecedence::Let |
             ExprPrecedence::Unary => PREC_PREFIX,
 
             // Unary, postfix
@@ -338,9 +339,7 @@ impl ExprPrecedence {
             ExprPrecedence::Path |
             ExprPrecedence::Paren |
             ExprPrecedence::If |
-            ExprPrecedence::IfLet |
             ExprPrecedence::While |
-            ExprPrecedence::WhileLet |
             ExprPrecedence::ForLoop |
             ExprPrecedence::Loop |
             ExprPrecedence::Match |
-- 
cgit 1.4.1-3-g733a5