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give a better error for tuple structs in derive(Diagnostic)

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This commit is contained in:
jyn 2023-12-24 18:34:31 -05:00
parent d792e1f50a
commit 3141a65d25
6 changed files with 142 additions and 139 deletions
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5
compiler/rustc_macros/src/diagnostics/diagnostic_builder.rs
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@ -253,7 +253,10 @@ impl DiagnosticDeriveVariantBuilder {
let mut field_binding = binding_info.binding.clone();
field_binding.set_span(field.ty.span());
let ident = field.ident.as_ref().unwrap();
let Some(ident) = field.ident.as_ref() else {
span_err(field.span().unwrap(), "tuple structs are not supported").emit();
return TokenStream::new();
};
let ident = format_ident!("{}", ident); // strip `r#` prefix, if present
quote! {