Merge ref 'f957826bff7a' from rust-lang/rust

Pull recent changes from https://github.com/rust-lang/rust via Josh.

Upstream ref: f957826bff7a68b267ce75b1ea56352aed0cca0a
Filtered ref: 7291893f9d875b6e8775a7a0e661abdaec15d3c1
Upstream diff: https://github.com/rust-lang/rust/compare/caccb4d0368bd918ef6668af8e13834d07040417...f957826bff7a68b267ce75b1ea56352aed0cca0a

This merge was created using https://github.com/rust-lang/josh-sync.

1 files changed, 60 insertions, 0 deletions

diff --git a/compiler/rustc_attr_parsing/src/attributes/debugger.rs b/compiler/rustc_attr_parsing/src/attributes/debugger.rs
new file mode 100644
index 00000000000..56ff10be426
--- /dev/null
+++ b/compiler/rustc_attr_parsing/src/attributes/debugger.rs
@@ -0,0 +1,60 @@
+use rustc_hir::attrs::{DebugVisualizer, DebuggerVisualizerType};
+
+use super::prelude::*;
+
+pub(crate) struct DebuggerViualizerParser;
+
+impl<S: Stage> CombineAttributeParser<S> for DebuggerViualizerParser {
+    const PATH: &[Symbol] = &[sym::debugger_visualizer];
+    const ALLOWED_TARGETS: AllowedTargets =
+        AllowedTargets::AllowList(&[Allow(Target::Mod), Allow(Target::Crate)]);
+    const TEMPLATE: AttributeTemplate = template!(
+        List: &[r#"natvis_file = "...", gdb_script_file = "...""#],
+        "https://doc.rust-lang.org/reference/attributes/debugger.html#the-debugger_visualizer-attribute"
+    );
+
+    type Item = DebugVisualizer;
+    const CONVERT: ConvertFn<Self::Item> = |v, _| AttributeKind::DebuggerVisualizer(v);
+
+    fn extend<'c>(
+        cx: &'c mut AcceptContext<'_, '_, S>,
+        args: &'c ArgParser<'_>,
+    ) -> impl IntoIterator<Item = Self::Item> + 'c {
+        let Some(l) = args.list() else {
+            cx.expected_list(args.span().unwrap_or(cx.attr_span));
+            return None;
+        };
+        let Some(single) = l.single() else {
+            cx.expected_single_argument(l.span);
+            return None;
+        };
+        let Some(mi) = single.meta_item() else {
+            cx.expected_name_value(single.span(), None);
+            return None;
+        };
+        let path = mi.path().word_sym();
+        let visualizer_type = match path {
+            Some(sym::natvis_file) => DebuggerVisualizerType::Natvis,
+            Some(sym::gdb_script_file) => DebuggerVisualizerType::GdbPrettyPrinter,
+            _ => {
+                cx.expected_specific_argument(
+                    mi.path().span(),
+                    &[sym::natvis_file, sym::gdb_script_file],
+                );
+                return None;
+            }
+        };
+
+        let Some(path) = mi.args().name_value() else {
+            cx.expected_name_value(single.span(), path);
+            return None;
+        };
+
+        let Some(path) = path.value_as_str() else {
+            cx.expected_string_literal(path.value_span, Some(path.value_as_lit()));
+            return None;
+        };
+
+        Some(DebugVisualizer { span: mi.span(), visualizer_type, path })
+    }
+}