From 3df2acd31ba14544ddb7fb1b0e73e6235824d4a3 Mon Sep 17 00:00:00 2001
From: clubby789 <jamie@hill-daniel.co.uk>
Date: Fri, 21 Mar 2025 05:09:57 +0000
Subject: Allow boolean literals in `check-cfg`

---
 compiler/rustc_interface/src/interface.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'compiler/rustc_interface/src/interface.rs')

diff --git a/compiler/rustc_interface/src/interface.rs b/compiler/rustc_interface/src/interface.rs
index 3f87b1a547b..33b4a48b28d 100644
--- a/compiler/rustc_interface/src/interface.rs
+++ b/compiler/rustc_interface/src/interface.rs
@@ -204,6 +204,14 @@ pub(crate) fn parse_check_cfg(dcx: DiagCtxtHandle<'_>, specs: Vec<String>) -> Ch
                     error!("`cfg()` names cannot be after values");
                 }
                 names.push(ident);
+            } else if let Some(boolean) = arg.boolean_literal() {
+                if values_specified {
+                    error!("`cfg()` names cannot be after values");
+                }
+                names.push(rustc_span::Ident::new(
+                    if boolean { rustc_span::kw::True } else { rustc_span::kw::False },
+                    arg.span(),
+                ));
             } else if arg.has_name(sym::any)
                 && let Some(args) = arg.meta_item_list()
             {
-- 
cgit 1.4.1-3-g733a5