From 95742ff23cf2283da796f483386367f7fdc06bc6 Mon Sep 17 00:00:00 2001
From: David Tolnay <dtolnay@gmail.com>
Date: Wed, 25 Oct 2023 11:15:18 -0700
Subject: [PATCH] Add a Parse impl for symbol Value

---
 compiler/rustc_macros/src/symbols.rs | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/compiler/rustc_macros/src/symbols.rs b/compiler/rustc_macros/src/symbols.rs
index 4df7eb63104..c48df8313b2 100644
--- a/compiler/rustc_macros/src/symbols.rs
+++ b/compiler/rustc_macros/src/symbols.rs
@@ -65,13 +65,19 @@ impl Parse for Symbol {
     fn parse(input: ParseStream<'_>) -> Result<Self> {
         let name = input.parse()?;
         let colon_token: Option<Token![:]> = input.parse()?;
-        let value =
-            if colon_token.is_some() { Value::String(input.parse()?) } else { Value::SameAsName };
+        let value = if colon_token.is_some() { input.parse()? } else { Value::SameAsName };
 
         Ok(Symbol { name, value })
     }
 }
 
+impl Parse for Value {
+    fn parse(input: ParseStream<'_>) -> Result<Self> {
+        let lit: LitStr = input.parse()?;
+        Ok(Value::String(lit))
+    }
+}
+
 struct Input {
     keywords: Punctuated<Keyword, Token![,]>,
     symbols: Punctuated<Symbol, Token![,]>,