Rollup merge of #92714 - yanganto:ignore-message, r=Mark-Simulacrum

Provide ignore message in the result of test

Provide ignore the message in the result of the test.

This PR does not need RFC, because it is about the presentation of the report of `cargo test`.

However, the following document listed here helps you to know about PR.

- [RFC](https://github.com/rust-lang/rfcs/pull/3217)
- [Rendered](https://github.com/yanganto/rfcs/blob/ignore-test-message/text/0000-ignore-test-message.md)
- [Previous discussion on IRLO](https://internals.rust-lang.org/t/pre-rfc-provide-ignore-message-when-the-test-ignored/15904)

If there is something improper, please let me know.
Thanks.

compiler/rustc_builtin_macros/src/test.rs

@@ -262,6 +262,15 @@ pub fn expand_test_or_bench(
                                         "ignore",
                                         cx.expr_bool(sp, should_ignore(&cx.sess, &item)),
                                     ),
+                                    // ignore_message: Some("...") | None
+                                    field(
+                                        "ignore_message",
+                                        if let Some(msg) = should_ignore_message(cx, &item) {
+                                            cx.expr_some(sp, cx.expr_str(sp, msg))
+                                        } else {
+                                            cx.expr_none(sp)
+                                        },
+                                    ),
                                     // compile_fail: true | false
                                     field("compile_fail", cx.expr_bool(sp, false)),
                                     // no_run: true | false
@@ -364,6 +373,20 @@ fn should_ignore(sess: &Session, i: &ast::Item) -> bool {
     sess.contains_name(&i.attrs, sym::ignore)
 }
 
+fn should_ignore_message(cx: &ExtCtxt<'_>, i: &ast::Item) -> Option<Symbol> {
+    match cx.sess.find_by_name(&i.attrs, sym::ignore) {
+        Some(attr) => {
+            match attr.meta_item_list() {
+                // Handle #[ignore(bar = "foo")]
+                Some(_) => None,
+                // Handle #[ignore] and #[ignore = "message"]
+                None => attr.value_str(),
+            }
+        }
+        None => None,
+    }
+}
+
 fn should_panic(cx: &ExtCtxt<'_>, i: &ast::Item) -> ShouldPanic {
     match cx.sess.find_by_name(&i.attrs, sym::should_panic) {
         Some(attr) => {