Readd the matches_macro diag item

This is now used by Clippy
rust-lang · Nov 17, 2022 · 34a1434 · 34a1434
1 parent b6097f2
commit 34a1434
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diff --git a/compiler/rustc_span/src/symbol.rs b/compiler/rustc_span/src/symbol.rs
@@ -893,6 +893,7 @@ symbols! {
         masked,
         match_beginning_vert,
         match_default_bindings,
+        matches_macro,
         maxnumf32,
         maxnumf64,
         may_dangle,

diff --git a/library/core/src/macros/mod.rs b/library/core/src/macros/mod.rs
@@ -338,6 +338,7 @@ pub macro debug_assert_matches($($arg:tt)*) {
 /// ```
 #[macro_export]
 #[stable(feature = "matches_macro", since = "1.42.0")]
+#[cfg_attr(not(test), rustc_diagnostic_item = "matches_macro")]
 macro_rules! matches {
     ($expression:expr, $(|)? $( $pattern:pat_param )|+ $( if $guard: expr )? $(,)?) => {
         match $expression {