From 948832d10ba2fe59c5c08c5642e5835a4d9922b9 Mon Sep 17 00:00:00 2001
From: Jonas Schievink <jonasschievink@gmail.com>
Date: Thu, 10 Dec 2020 13:46:47 +0100
Subject: format_args: handle key-value arguments

---
 crates/hir_expand/src/builtin_macro.rs | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'crates/hir_expand/src/builtin_macro.rs')

diff --git a/crates/hir_expand/src/builtin_macro.rs b/crates/hir_expand/src/builtin_macro.rs
index f60666a54..477192a09 100644
--- a/crates/hir_expand/src/builtin_macro.rs
+++ b/crates/hir_expand/src/builtin_macro.rs
@@ -245,6 +245,12 @@ fn format_args_expand(
     if args.is_empty() {
         return ExpandResult::only_err(mbe::ExpandError::NoMatchingRule);
     }
+    for arg in &mut args {
+        // Remove `key =`.
+        if matches!(arg.get(1), Some(tt::TokenTree::Leaf(tt::Leaf::Punct(p))) if p.char == '=') {
+            arg.drain(..2);
+        }
+    }
     let _format_string = args.remove(0);
     let arg_tts = args.into_iter().flat_map(|arg| {
         quote! { std::fmt::ArgumentV1::new(&(##arg), std::fmt::Display::fmt), }
-- 
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