rename rustc_attr to rustc_attr_parsing and create rustc_attr_data_structures

1 files changed, 21 insertions, 0 deletions

diff --git a/compiler/rustc_attr_parsing/src/attributes/confusables.rs b/compiler/rustc_attr_parsing/src/attributes/confusables.rs
new file mode 100644
index 00000000000..672fcf05eda
--- /dev/null
+++ b/compiler/rustc_attr_parsing/src/attributes/confusables.rs
@@ -0,0 +1,21 @@
+//! Parsing and validation of builtin attributes
+
+use rustc_ast::MetaItemInner;
+use rustc_ast::attr::AttributeExt;
+use rustc_span::symbol::Symbol;
+
+/// Read the content of a `rustc_confusables` attribute, and return the list of candidate names.
+pub fn parse_confusables(attr: &impl AttributeExt) -> Option<Vec<Symbol>> {
+    let metas = attr.meta_item_list()?;
+
+    let mut candidates = Vec::new();
+
+    for meta in metas {
+        let MetaItemInner::Lit(meta_lit) = meta else {
+            return None;
+        };
+        candidates.push(meta_lit.symbol);
+    }
+
+    Some(candidates)
+}