New upstream version 1.61.0+dfsg1

[rustc.git] / compiler / rustc_builtin_macros / src / concat.rs

diff --git a/compiler/rustc_builtin_macros/src/concat.rs b/compiler/rustc_builtin_macros/src/concat.rs
index e5077d93674a19be6ff1c0c1ea774a69e243d26f..a23dd1d1213b718cd1cacc7943b13c5e901370df 100644 (file)
--- a/compiler/rustc_builtin_macros/src/concat.rs
+++ b/compiler/rustc_builtin_macros/src/concat.rs
@@ -10,9 +10,8 @@ pub fn expand_concat(
     sp: rustc_span::Span,
     tts: TokenStream,
 ) -> Box<dyn base::MacResult + 'static> {
-    let es = match base::get_exprs_from_tts(cx, sp, tts) {
-        Some(e) => e,
-        None => return DummyResult::any(sp),
+    let Some(es) = base::get_exprs_from_tts(cx, sp, tts) else {
+        return DummyResult::any(sp);
     };
     let mut accumulator = String::new();
     let mut missing_literal = vec![];
@@ -21,7 +20,7 @@ pub fn expand_concat(
         match e.kind {
             ast::ExprKind::Lit(ref lit) => match lit.kind {
                 ast::LitKind::Str(ref s, _) | ast::LitKind::Float(ref s, _) => {
-                    accumulator.push_str(&s.as_str());
+                    accumulator.push_str(s.as_str());
                 }
                 ast::LitKind::Char(c) => {
                     accumulator.push(c);