add expected_list_with_num_args_or_more attribute parsing error

Author: Bryntet

compiler/rustc_attr_parsing/src/context.rs

@@ -490,6 +490,10 @@ impl<'f, 'sess: 'f, S: Stage> AcceptContext<'f, 'sess, S> {
         self.emit_parse_error(span, AttributeParseErrorReason::ExpectedList)
     }
 
+    pub(crate) fn expected_list_with_num_args_or_more(&self, args: usize, span: Span) -> ErrorGuaranteed {
+        self.emit_parse_error(span, AttributeParseErrorReason::ExpectedListWithNumArgsOrMore { args})
+    }
+
     pub(crate) fn expected_list_or_no_args(&self, span: Span) -> ErrorGuaranteed {
         self.emit_parse_error(span, AttributeParseErrorReason::ExpectedListOrNoArgs)
     }

compiler/rustc_attr_parsing/src/session_diagnostics.rs

@@ -520,6 +520,9 @@ pub(crate) enum AttributeParseErrorReason<'a> {
     ExpectedSingleArgument,
     ExpectedList,
     ExpectedListOrNoArgs,
+    ExpectedListWithNumArgsOrMore {
+        args: usize,
+    },
     ExpectedNameValueOrNoArgs,
     UnexpectedLiteral,
     ExpectedNameValue(Option<Symbol>),
@@ -596,6 +599,9 @@ impl<'a, G: EmissionGuarantee> Diagnostic<'a, G> for AttributeParseError<'_> {
             AttributeParseErrorReason::ExpectedListOrNoArgs => {
                 diag.span_label(self.span, "expected a list or no arguments here");
             }
+            AttributeParseErrorReason::ExpectedListWithNumArgsOrMore { args } => {
+                diag.span_label(self.span, format!("expected {args} or more items"));
+            }
             AttributeParseErrorReason::ExpectedNameValueOrNoArgs => {
                 diag.span_label(self.span, "didn't expect a list here");
             }