Auto merge of #114063 - matthiaskrgr:rollup-c90czu6, r=matthiaskrgr

Rollup of 7 pull requests

Successful merges:

 - #114008 (coverage: Obtain the `__llvm_covfun` section name outside a per-function loop)
 - #114014 (builtin_macros: expect raw strings too)
 - #114043 (docs(LazyLock): add example pass local LazyLock variable to struct)
 - #114051 (Add regression test for invalid "unused const" in method)
 - #114052 (Suggest `{Option,Result}::as_ref()` instead of `cloned()` in some cases)
 - #114058 (Add help for crate arg when crate name is invalid)
 - #114060 (abi: unsized field in union - assert to delay bug )

r? `@ghost`
`@rustbot` modify labels: rollup

1 files changed, 6 insertions, 0 deletions

diff --git a/compiler/rustc_errors/src/diagnostic_impls.rs b/compiler/rustc_errors/src/diagnostic_impls.rs
index 9c972342f25..132f2c015b8 100644
--- a/compiler/rustc_errors/src/diagnostic_impls.rs
+++ b/compiler/rustc_errors/src/diagnostic_impls.rs
@@ -164,6 +164,12 @@ impl IntoDiagnosticArg for hir::ConstContext {
     }
 }
 
+impl IntoDiagnosticArg for ast::Expr {
+    fn into_diagnostic_arg(self) -> DiagnosticArgValue<'static> {
+        DiagnosticArgValue::Str(Cow::Owned(pprust::expr_to_string(&self)))
+    }
+}
+
 impl IntoDiagnosticArg for ast::Path {
     fn into_diagnostic_arg(self) -> DiagnosticArgValue<'static> {
         DiagnosticArgValue::Str(Cow::Owned(pprust::path_to_string(&self)))